CN106643464B - A kind of composite material based on carbon nano-tube film is respectively to strain monitoring method - Google Patents
A kind of composite material based on carbon nano-tube film is respectively to strain monitoring method Download PDFInfo
- Publication number
- CN106643464B CN106643464B CN201611230481.0A CN201611230481A CN106643464B CN 106643464 B CN106643464 B CN 106643464B CN 201611230481 A CN201611230481 A CN 201611230481A CN 106643464 B CN106643464 B CN 106643464B
- Authority
- CN
- China
- Prior art keywords
- carbon nano
- tube film
- strain
- carbon
- composite material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
Abstract
The invention discloses a kind of carbon nano-tube film/composite material integrated molding strain monitoring methods, comprising: preparation carbon nanotube alignment films；Carbon nano-tube film is cut into U-shaped dentation sensor according to demand；The above-mentioned carbon nano-tube film strain transducer processed and resin progress is compound, and precuring becomes carbon nano-tube film precast body；Carbon nano-tube film precast body is laid on the upper and lower surface of material prepreg by the laying of composite material, forms the carbon nanotube film composite material that can carry out strain monitoring；Connection electrode material, on-line monitoring strain are applied to composite material by a variety of loading modes, record the variation of resistance instrument, calculate the real-time change of strain.Carbon nanotube film composite material strain transducer prepared by the present invention can effectively monitor various forms of strains on composite material, response is rapid, susceptibility is high, the influence of multi-direction strain caused by sensor poisson effect is overcome, while more preferably having played the piezoresistive characteristic of carbon nanotube itself by draw orientation.
Description
Technical field
The present invention relates to a kind of carbon nanotube alignment films and its preparation methods of composite material, are set by reasonable structure
It can be realized each to strain monitoring of material after meter, the carbon nano-tube film and composite material integrated molding.
Background technique
Japan Electronic Speculum expert Iijima has had found that the brainstrust of different field is to this since carbon nanotube (CNTs) since 1991
The unique one-dimensional graphite-structure of kind produces keen interest.Carbon nanotube has high tensile strength, elasticity modulus and bullet
Property deformation, comprehensive performance be higher than it is any it has been found that traditional material.Such as the modulus of single-walled carbon nanotube is up to 1TPa (about
5 times of steel), tensile strength is commonly distributed in 50-200GPa, and the density of single-walled carbon nanotube only has 1.2g/cm3It is left
It is right.Therefore, the more current high-performance carbon fibre composite material of carbon nano tube compound material is lighter, stronger.In addition, carbon nanotube has
There is excellent electric, thermally conductive and thermal stability, therefore carbon nano tube compound material is considered as most potential substitution carbon fiber composite
Expect while realizing the next-generation advanced composite material of structure/function integration.
In numerous application fields of carbon nanotube, its determined by the pressure drag performance of carbon nanotube is in strain transducer
The effect in field is noticeable.Carbon nanotube has excellent pressure drag performance, and single-root carbon nano-tube is electric under 1% range of strain
Resistance can change 75 times, have splendid sensibility to deformation, be the excellent materials of strain sensor.The pressure of carbon nanotube itself
Contact resistance between resistive energy and carbon nanotube, making carbon nano-tube film also has good strain sensitivity, has more simultaneously
Good processing performance, is more suitable for the strain monitoring of macrostructure material.
The patent CN200910188746.9 of Tsinghua University and Hongfujin Precise Industry's joint application
" strain gauge means and measurement method " discloses a kind of strain gauge means comprising: a foil gauge；One for clamping and drawing
The clamping device of the foil gauge is stretched, the foil gauge generates longitudinal strain in the stretching direction, on perpendicular to draw direction
Generate transverse strain；And the image recording structure of a transverse strain for measuring the foil gauge；It is characterized in that, described
Foil gauge includes a carbon nano tube membrane structure, which includes multiple carbon nanotubes, the multiple carbon nanotube
It is arranged of preferred orient respectively along a first direction and a second direction, the carbon nanotube being arranged of preferred orient along first direction and edge
The carbon nanotube overlapping that second direction is arranged of preferred orient is arranged in a crossed manner, and the first direction and second direction have an angle,
The angle is greater than 0 and is less than 180 degree, in use, foil gauge is the folder bisector of angle along the first direction and second direction
Direction be arranged in clamping device.Sensor strains outside Direction distortion along monitoring when being monitored using such method, is imitated by Poisson
In vertical monitoring direction, deformation occurs for the influence answered, these factors can all cause the variation of monitoring signals.Using the method for the present invention,
Vertical monitoring direction strain, which can be reduced, to be influenced.
In addition, can produce carbon nano-tube film and composite material integrated molding each real-time in the process what is used
Monitor the composite material of strain.Compared with existing strain transducer, carbon nanotube film sensors have bigger strain sensitivity,
More preferably environmental resistance and can be with composite material integrated molding the advantages of.
Patent CN201610546596.4 " the structure/heating integral composite wood of Shanghai Composite Technology Co
Material and preparation method thereof " provides a kind of structure/heating integral composite material and preparation method；The composite material is packet
Include reinforcement layer, carbon nano-tube film/resin compounded layer multilayered structure；The reinforcement layer, carbon nano-tube film/resin compounded layer
Successively laying.The method is to connect carbon nano-tube film/resin compounded layer with electrode, then as heating element laying in increasing
Strong body interlayer or surface, prepare composite material by integrated forming technique.The composite material of invention preparation has excellent
Mechanical property and electric heating characteristic have boundless application in fields such as deep space exploration, polar region observation, civil electronic devices
Prospect.The tensile strength and modulus of its composite material are respectively increased 3% or more compared with the structural composite material of respective material system,
Any heating temperature within 150 DEG C can reach balance, and laser heating 200 hours at 150 DEG C within 5 minutes,
Resistance variations are less than 5%.This method still cannot overcome influence of the multi-direction strain of material to electric signal using carbon nano-tube film,
Randomly-oriented carbon nano-tube film relies primarily on the resistance variations between carbon nanotube and realizes piezoresistive characteristic simultaneously, passes through carbon after orientation
Nanotube bearing capacity is stronger, can more preferably play the piezoresistive characteristic of carbon nanotube itself.
The prior art mostly uses the form of particle-filled resin greatly to prepare carbon nano tube compound material, but by carbon nanometer
The performance of its composite material of the dispersion of pipe difficulty and the influence of random distribution is horizontal far below expected.Have been developed that many carbon are received at present
Mitron dispersion technology, such as ultrasound, the grinding of three rollers, ball milling and Screw Extrusion, however be difficult to prepare using these technologies well dispersed
High content of carbon nanotubes composite material, and as the viscosity of the increase system of content of carbon nanotubes increases substantially, at
Type technique has an impact.Drawbacks described above can effectively be avoided by carrying out whole compound method using carbon nano-tube film and resin, sufficiently
Play the good mechanics of carbon nano-tube film, functional characteristic.Meanwhile strain monitoring mistake is carried out using the carbon nano-tube film of traditional full wafer
Cheng Zhong needs to develop a kind of strain monitoring side because of comprehensive function of the resistance by multiple directions deformation of piezoresistive effect carbon periosteum
Method realizes the strain monitoring of a direction.
Summary of the invention
The object of the present invention is to provide a kind of carbon nano-tube film/composite material integrated molding strain monitoring methods.In order to
Realize that this purpose, this method use following technical scheme.
A kind of carbon nano-tube film/composite material integrated molding strain monitoring method, includes the following steps:
(1) random carbon nano-tube film is prepared, and carbon nanotube alignment films are made by mechanical commutation draft；
(2) above-mentioned carbon nanotube alignment films are processed into the carbon nano-tube film strain transducer with continuous U dentation；
(3) preimpregnation of carbon nano-tube film, the above-mentioned carbon nano-tube film strain transducer processed and resin progress is compound,
Precuring becomes carbon nano-tube film precast body；
(4) laying of carbon nano-tube film strain transducer and composite molding, above-mentioned carbon nano-tube film precast body is laid on
The upper and lower surface of material prepreg obtains composite material, and by the composite material cure under pressure, formation can carry out strain prison
The carbon nanotube film composite material of survey；
(5) connection electrode material, on-line monitoring strain, will can carry out the electricity of the carbon nanotube film composite material of strain monitoring
Pole is connected to external circuits, changes the shape of composite material by a variety of loading modes, records the variation of resistance instrument, calculates and answer
The real-time change of change.
The carbon nanotube that random carbon nano-tube film is not less than 0.1 μm by tens to several hundred thickness degree in the step (1)
Thin layer is constituted, carbon nanotube Two dimensional Distribution in pellicular front, random orientation, not along thickness distribution.
In the step (1) in the forming process of random carbon nano-tube film, carbon nanotube and carbon nano-tube film are simultaneously
It is formed；The carbon nano-tube film has good drawdown simultaneously, can change the orientation of carbon nanotube by mechanical commutation draft.
Change the degree of draft preparation carbon nanotube orientation of carbon nano-tube film in the step (1) using more roller systems
The velocity of rotation of film, each roller bearing is incremented by successively from feed end to discharge end rate, roller bearing speed 1mm/min-30mm/min.
In the step (2), continuous U dentation required for sheet carbon nanotube alignment films are processed into, system will be cut into
At carbon nano-tube film strain transducer, dentation carbon nano-tube film narrowband width 0.2-1mm after processing, carbon nanotube senses section gap
0.5-1mm, carbon nano-tube film tooth edge lengths and width ratio are greater than 5.To extend the effective of carbon nano-tube film strain sensing
Length, has utmostly played the piezoresistive effect of carbon nanotube itself, while overcoming vertical direction when monitoring the strain of certain direction
Poisson effect caused by influence.
Using the carbon nano-tube film after thermosetting property or thermoplastic resin impregnation processability in the step (3).For thermosetting property
Resin, using the fiber prepreg material of thermosetting resin, according to mold-prepreg-tetrafluoro cloth-carbon nano-tube film-with holes four with holes
Fluorine cloth-prepreg-tetrafluoro cloth-carbon nano-tube film-with holes tetrafluoro cloth-prepreg-mold sequence with holes carries out in hot press
Hot pressing can once prepare the carbon nano-tube film of multilayer preimpregnation.Prepreg resin mass fraction used in it is greater than 38wt%.?
It is lower than the temperature of 20-30 DEG C of resin system solidification temperature in hot press, hot pressing is carried out to resin solidification with the pressure of 5-10MPa
Spend 50-70%.For thermoplastic resin, it can be dissolved in polar solvent, be configured to the resin solution of 1wt%-5wt%, impregnated
Carbon nano-tube film is pressed using vacuum bag thereafter by carbon nano-tube film laying and mold and guarantees that carbon nano-tube film is smooth, promoted simultaneously
It volatilizees into solvent.
The resin system refers to polyethylene, polyvinyl alcohol, epoxy resin, bismaleimide resin, poly- aryl ethane resin and gathers
Any one or more in acid imide.
In the step (4) by prepreg according to laying sequence laying at composite material preformed body, and upper and lower two
Surface can monitor two mutually to hang down respectively along mutually perpendicular direction laying carbon nano-tube film strain transducer precast body respectively
The composite material in a direction strains.It can add simultaneously between the prepreg and carbon nanotube film sensors of conductive fiber preparation
Enter a layer insulating, can be glass fibre mat or electrician, aramid fiber mat or plastic film, thickness 0.02-
0.1mm。
In the step (5), metal electrode, electricity are connected in two ends of continuous U dentation carbon nanotube film sensors
It can be extremely copper wire or silver wire, and use two ends of conductive silver glue connection electrode and carbon nano-tube film, so that it is electric to reduce contact
Resistance.On-line monitoring strain are as follows: when longitudinal stretching occurs for composite material, monitor that the variation of resistance value removes by upper surface
The longitudinal strain of material can be obtained with the strain sensitive coefficient of carbon nano-tube film, can be removed by the variation of following table surface resistance
The transverse strain of material can be obtained with the strain sensitive coefficient of carbon nano-tube film, the change of upper surface resistance value is divided by lower surface
The change of resistance value is the Poisson's ratio of composite material.
The present invention further uses following specific technical solution:
The first step prepares randomly-oriented carbon nano-tube film, which can be carried out using the methods of chemical meteorology deposition
Preparation；By what time the carbon nano-tube film to several hundred thickness degree not higher than 0.1 μm is constituted, carbon nanotube is presented the film in film
Two-dimentional random distribution, not along thickness distribution.Length of carbon nanotube in the carbon nano-tube film reaches Centimeter Level, intertwine with each other and has
There is good drawdown, the orientation of carbon nanotube can be changed by mechanical commutation draft.
The carbon nanotube band of 3-5cm wide is carried out draw orientation on the more roller systems of three-level differential by second step, preparation
Carbon nanotube alignment films.The revolving speed of first order roller bearing is 5mm/s, through the rotational speed difference between regulation roller bearing from 5mm/s to 30mm/
S, degree of draft can reach 5%-30%.
Carbon nano-tube film is cut into different size of flaky material, width 1-20mm, length by third step according to demand
For 5-30mm.U-shaped dentation required for its work, dentation carbon nano-tube film tooth hem width degree are processed into using laser cutting method
0.2-1mm, tooth side spacing 0.5-1mm, carbon nano-tube film tooth edge lengths and width ratio are greater than 5, and optimum ratio is greater than 10, thus
Processing obtains carbon nano-tube film strain transducer.
4th step, the preimpregnation of carbon nano-tube film carry out the above-mentioned carbon nano-tube film strain transducer processed and resin
Compound, precuring becomes carbon nano-tube film precast body, and resin system used can be epoxy resin, bismaleimide tree
Rouge, cyanate ester resin etc..For thermosetting resin, carbon nano-tube film is infiltrated using the fiber prepreg material of thermosetting resin, wherein
Prepreg resin mass fraction used is greater than 38wt%.It is with holes according to mold-prepreg-tetrafluoro cloth-carbon nano-tube film-with holes
Tetrafluoro cloth-prepreg-tetrafluoro cloth-carbon nano-tube film-with holes tetrafluoro cloth-prepreg-mold sequence with holes in hot press into
Row hot pressing, the primary carbon nano-tube film for preparing multilayer preimpregnation.Lower than 20-30 DEG C of resin system solidification temperature in hot press
Temperature carries out hot pressing to resin solidification degree 50-70% with the pressure of 5-10MPa.For thermoplastic resin, polarity can be dissolved in
Solution is configured to the resin solution of 1wt%-5wt%, impregnates carbon nano-tube film, carbon nano-tube film sensing is obtained after solvent volatilization
Device.
Carbon nano-tube film precast body is laid on the upper and lower surface of material prepreg by the 5th step, the laying of composite material,
Carbon nano tube sensor U-shaped tooth edge lengths direction and monitoring should change direction unanimously, and by composite material cure under pressure, formation can be into
The carbon nanotube film composite material of row strain monitoring.For between the prepreg and carbon nanotube film sensors of conductive fiber preparation
A layer insulating can be added, can be glass fibre mat or electrician, aramid fiber mat or plastic film, thickness
0.02-0.1mm。
6th step, connection electrode material, by carbon nano-tube film strain transducer conductive silver glue and conductive copper wire or silver wire
Connection, after solidifying 1h at 100 DEG C, the contact resistance of electrode is less than 10m Ω.
7th step, strain on-line monitoring, is connected to external circuits for the electrode of composite material, is with Estimate of Resistance for DC Low Resistance instrument
Example, can be monitored in real time the variation of incoming end resistance.Apply load to composite material by a variety of loading modes, records resistance instrument
Variation, the real-time change of strain can be calculated by the piezoresistance factor of carbon nano-tube film.
The present invention has the advantages that
(1) carbon nanotube film composite material strain transducer prepared by the present invention can effectively monitor various shapes on composite material
There is response to be widely used, the high advantage of susceptibility rapidly for the strain of formula.
(2) U-shaped dentalation effectively eliminates the influence of full wafer carbon nano-tube film poisson effect, i.e. carbon nano-tube film direction
It strains, the strain influence of vertical direction is preferably minimized, thus accurately perception material strain variation.
(3) U-shaped dentalation increases the effective length of monitoring section by several times, is used for strain monitoring, and resistance variations signal is rung
It should be more significant.
(4) carbon nanotube film composite material strain transducer prepared by the present invention can be by adjusting carbon nano-tube film itself
Degree of draft respectively reaches 14 and 30% to change the strain sensitive coefficient and strain monitoring range of sensor.Make it possible to root
It is adjusted according to demand, produces and uses the strain transducer of different degree of drafts.
(5) carbon nano-tube film used in the present invention can prepare answering under various circumstances from different resin compoundeds
Condensation material strain transducer.Such as compound with epoxy resin, sensor can work in an acidic or alkaline environment.With poly- aryl ethane
Compound, sensor is resistant to 250 DEG C of high temperature.
(6) present invention can be used not only for monitoring glass fibre, aramid fiber reinforced composite, while introducing insulating layer can benefit
It is used to monitor the strain of the conductive fiber composite materials such as carbon fiber with carbon nano-tube film resistance variations.
(6) strain transducer prepared by the present invention can measure composite material in the strain of both direction simultaneously, and calculate
The Poisson's ratio of material out.
Detailed description of the invention
Fig. 1 is initial randomly-oriented carbon nanometer tube film surface appearance；
Drafting process of the more roller systems of Fig. 2 to carbon nano-tube film band；
Carbon nano-tube film microscopic appearance after Fig. 3 draw orientation；
The U-shaped dentation carbon nano-tube film strain transducer machining sketch chart of Fig. 4；
Fig. 5 carbon nano-tube film presoaks ply angles schematic diagram；
Fig. 6 carbon nanotube and conductive fiber laying are arranged；
Fig. 7 different directions strain monitoring method schematic diagram；
When Fig. 8 is that composite product is axially stretched in embodiment, the relationship of carbon nanotube film resistance and longitudinal strain；
When Fig. 9 is that composite product is axially stretched in embodiment, the relationship of carbon nanotube film resistance and transverse strain.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is further explained.It should be understood that these embodiments are merely to illustrate
The present invention rather than limit the scope of the invention.In addition, it should also be understood that, after reading the content that the present invention lectures, ability
Field technique personnel can make various changes or modification to the present invention, and such equivalent forms also belong to the application appended claims
Book limited range.
The present invention provides a kind of composite material based on carbon nano-tube film respectively to strain monitoring method, the preparation method packet
Include following steps:
The first step, the preparation of random carbon nano-tube film.
The film can be prepared using the methods of vapor deposition；The film is not less than by tens to several hundred thickness degree
0.1 μm of carbon nanotube thin layer is constituted, carbon nanotube Two dimensional Distribution in pellicular front, random orientation, not along thickness distribution, referring to
Fig. 1.The vapour deposition process prepare carbon nano-tube film the following steps are included:
Under the protective effect of inert gas (such as argon gas, hydrogen or both mixture), by carbon source ethyl alcohol, thiophene and catalysis
Agent ferrocene mixed system injects in high temperature process furnances.The carbon to be formed is collected using wind in the other end of high temperature process furnances
Nanotube aeroge, single layer aeroge thickness are about 0.1 μm, collect winding drum width 5cm, the diameter 1m of aeroge, are used
Spray solution forms carbon nano-tube film after carbon nanotube aerogel, solution evaporation, with winding thickness in monolayer variation, finally
Several microns to tens microns of carbon nano-tube film thickness, it finally is parallel to axial incision along winding drum surface, carbon is formed and receives
Mitron film band.The production method of this carbon nano-tube film is easier to realize continuous batch production, and by adjusting height
The diameter and wind of warm tube furnace can control the size of carbon nano-tube film, thus more can satisfy actual answer
With.The thickness of carbon nano-tube film single layer can be controlled by adjusting the time of winding, but is not less than 0.1 micron.Change life
One of the available single-walled carbon nanotube of elongate member, few-wall carbon nanotube and multi-walled carbon nanotube or a variety of, carbon nanotube
Between intertwine with each other to form freestanding carbon nanotube film by Van der Waals force.Carbon nanotube and carbon nano-tube film are almost simultaneously
It is formed, therefore the excellent properties loss of carbon nanotube is smaller.
Carbon nano-tube film is carried out on more roller systems draw orientation, prepares carbon nanotube alignment films by second step.
The present invention changes the degree of draft of carbon nano-tube film using more roller systems, and the rate of extension of each roller bearing is 5mm/
Min, 10mm/min, 15mm/min etc. can regulate and control the degree of draft of carbon periosteum, see figure by adjusting the speed difference between roller
2.In order to improve the drawability of carbon nano-tube film, need to spray alcohol solvent in drafting process, ethyl alcohol can eliminate drawing-off
The defect and hole formed between carbon nano-tube film in the process, enables drafting process to go on smoothly and is unlikely to destroy.
In drafting process, carbon nanotube narrows along drawing-off direction preferred orientation, the width of carbon nano-tube film, and degree of draft can reach 5%-
30%, see Fig. 3.
Carbon nano-tube film is cut into the flaky material of the different sizes such as 5 × 10mm according to demand, is processed into it by third step
U-shaped dentation required for working, is shown in Fig. 4, is processed into carbon nano-tube film strain transducer.Using laser cutting by carbon nano-tube film
It is processed into U-shaped dentation, such shape can give full play to the piezoresistive effect on carbon nano-tube film longitudinal direction, and eliminate laterally
Deformation on direction is influenced to piezoresistive effect bring.
4th step, the preimpregnation of carbon nano-tube film carry out the above-mentioned carbon nano-tube film strain transducer processed and resin
Compound, precuring becomes carbon nano-tube film precast body, while the resin on surface can inhibit conductive fiber in subsequent compounding processes
Deng the influence to its electric signal.
For thermosetting resin, carbon nano-tube compound film, this method carbon are prepared using composite molding pre-suction gluing method
It is controllable that nanotube films suck amount of resin, and is evenly distributed.It is with holes according to mold-prepreg-tetrafluoro cloth-carbon nano-tube film-with holes
Tetrafluoro cloth-prepreg-tetrafluoro cloth-carbon nano-tube film-with holes tetrafluoro cloth-prepreg-mold sequence with holes in hot press with
Temperature of 20 DEG C lower than resin system solidification temperature carries out hot pressing with the pressure of 5MPa, sees Fig. 5.After 1h processed, by entire mold with
Furnace is cooling, obtains carbon nano-tube film precast body.
For thermoplastic resin, it can be dissolved in polar solvent, be configured to the resin solution of 1wt%-5wt%, impregnated carbon
Nanotube films obtain carbon nanotube film sensors after solvent volatilization.
The resin system refers to polyethylene, polyvinyl alcohol, epoxy resin, bismaleimide resin, poly- aryl ethane resin and gathers
Any one in acid imide.
Carbon nano-tube film precast body is laid on the upper and lower surface of material prepreg by the 5th step, the laying of composite material,
By composite material cure under pressure, the carbon nanotube film composite material that can carry out strain monitoring is formed, sees Fig. 6.
By prepreg according to laying sequence laying at composite material preformed body, and upper and lower surfaces respectively along with
Carbon nano-tube film strain transducer precast body is axially spread perpendicular to composite material.In this way when sample is axially stretched,
The carbon nano-tube film of upper surface can monitor the longitudinal strain of sample, and the carbon nano-tube film in lower surface can monitor the cross of style
To strain.
It, can be with for a layer insulating can be added between the prepreg and carbon nanotube film sensors of conductive fiber preparation
For glass fibre mat or electrician, aramid fiber mat or plastic film, thickness 0.02-0.1mm.
Carbon nano-tube film strain transducer conductive silver glue is connect by the 6th step, connection electrode material with conductive copper wire,
After solidifying 1h at 100 DEG C, the contact resistance of electrode is less than 10m Ω.
7th step, strain on-line monitoring, is connected to external circuits for the electrode of composite material, is with Estimate of Resistance for DC Low Resistance instrument
Example, can be monitored in real time the variation of incoming end resistance.Composite material is loaded by a variety of loading modes, records resistance instrument
Variation can calculate the real-time change of strain in conjunction with the piezoresistance factor of carbon nano-tube film.
When longitudinal stretching occurs for composite material, monitor the variation of resistance value divided by carbon nanotube by upper surface
The longitudinal strain of material can be obtained in the strain sensitive coefficient of film.Similarly, material can be obtained by the variation of following table surface resistance
The transverse strain of material.The change of upper surface resistance value is the Poisson's ratio of composite material divided by the change of following table surface resistance.
Embodiment 1:
Using preparation method provided by the invention, by by the carbon nano-tube film of No yield point/epoxy composite film and glass fibers
Dimension composite material is compound, and preparation can be carried out the glass fiber compound material of axial strain monitoring, the specific steps are as follows:
The first step, the preparation of carbon nano-tube film；
Under the protective effect of inert gas, by the mixed liquor of ethyl alcohol, ferrocene and thiophene with the speed of 0.15ml/min
It is injected into 1300 DEG C of high temperature process furnances.Inert gas is the mixture of argon gas and hydrogen (volume ratio 1:1), and flow is
4000sccm.Continuous carbon nanotube aerogel is formed in the other end of high temperature process furnances, carbon nanometer is collected by wind
Pipe aeroge, roller width 3cm, diameter 0.5m, about 0.1 μm of carbon nanotube aerogel thickness in monolayer, while with ethyl alcohol and water
Mixed liquor sprinkling carbon nanotube aerogel obtains carbon nano-tube film.Collection obtains wide 3cm and thick 15 microns of carbon nanotube is thin
Film.
Second step, the preparation of carbon nanotube composite preform；
Carbon nano-tube film obtained above is cut into U-shaped dentation using laser cutting method, wherein tooth side length 5mm, wide
0.2mm, tooth side spacing be 1mm, by cutting, long 5mm, wide 5.8mm are formed, with a thickness of 15 microns of sensor, the sensor
Part is continuously made of the carbon streaking tube that 5 segment length are 5mm.Select unsaturated-resin/glass fibre prepreg, using mold/every
From film/epoxy prepreg/porous tetrafluoro cloth/carbon nano-tube film/porous tetrafluoro cloth/epoxy prepreg/isolation film/mould
The mode laying of tool, carries out hot pressing under 60 DEG C, 5MPa pressure, the abundant slipper dip carbon nano-tube film of resin, is made pre- after 1h
Cured carbon nano-tube film precast body.
Third step, carbon nano-tube film/glass fibre/epoxy composite material preparation；
Prepreg fiber is paved into unidirectional composite material laminate along 0 ° of direction, and on a surface of laminate along fiber
Carbon nano-tube film strain transducer precast body is spread in direction, and tooth edge lengths direction is consistent with machine direction.The preimpregnation that will be completed
Material solidifies 2h at 0.5MPa, 120 DEG C, and carbon nano-tube film/glass fibre/epoxy composite material is obtained after furnace cooling.In this way
When sample is axially stretched, the longitudinal strain of sample can be monitored by attaching carbon nano-tube film on the surface.
4th step, carbon nano-tube film/glass fibre/epoxy composite material axial strain monitoring
Carbon nano-tube film strain transducer end conductive silver glue is connect, 100 by connection electrode material with conductive copper wire
After solidifying 1h at DEG C, the contact resistance of electrode is less than 10m Ω.The electrode of composite material is connected to external Estimate of Resistance for DC Low Resistance
Instrument, the variation of real-time monitoring incoming end resistance.By applying axial strain on glass fiber compound material, pass through record electricity
The variation for hindering resistance value on instrument, can calculate the real-time change of strain.When Fig. 8 shows carbon nano-tube film tension, resistance and answer
The relationship of change, the strain sensitive factor are about 5.0.
Embodiment 2:
Using preparation method provided by the invention, draw orientation is carried out by roller bearing, the carbon that degree of draft is 30% is prepared and receives
Mitron film, and it is further compound with carbon fiber epoxy prepreg, and the carbon fiber epoxy that preparation can be carried out transverse strain monitoring is multiple
Condensation material.Specific step is as follows:
The first step, the preparation of carbon nano-tube film；
Under the protective effect of inert gas, by the mixed liquor of ethyl alcohol, ferrocene and thiophene with the speed of 0.15ml/min
It is injected into 1300 DEG C of high temperature process furnances.Inert gas is the mixture of argon gas and hydrogen (volume ratio 1:1), and flow is
4000sccm.Continuous carbon nanotube aerogel is formed in the other end of high temperature process furnances, carbon nanometer is collected by wind
Pipe aeroge, wind width 5cm, diameter 0.5m.Carbon nanotube is obtained with ethyl alcohol sprinkling carbon nanotube aerogel after collection
Film obtains wide 5cm and thick 15 microns of carbon nano-tube film.It is parallel to axis direction cutting along collection device surface, is formed
The carbon nanotube band of 5cm wide about 3m long.
Second step, the preparation of carbon nanotube composite preform；
Carbon nano-tube film band obtained is subjected to drawing-off, the revolving speed linear velocity of roller bearing by the three-level roller system of differential
Respectively 5mm/min, 11mm/min, 15mm/min, while ethyl alcohol leading convenient for carbon nano-tube film is sprayed during drawing-off
It stretches.The carbon nano-tube film that degree of draft is 30% is obtained, carbon film thickness becomes 25 microns after drawing-off.
Carbon nano-tube film obtained above is cut into U-shaped dentation using laser cutting method, wherein tooth side length 10mm, wide
1mm, tooth side spacing are 1mm, form long 10mm, wide 5mm, and with a thickness of 25 microns of sensor, which is 10mm by 3 segment length
Carbon streaking tube connect and compose.
E51 epoxy resin/carbon fiber prepreg is selected, using mold/isolation film/epoxy prepreg/porous tetrafluoro
Cloth/carbon nano-tube film/porous tetrafluoro cloth/epoxy prepreg/carbon nano-tube film/porous tetrafluoro cloth/epoxy prepreg/
Isolation film/mold laying mode carries out carrying out hot pressing under 70 DEG C, 10MPa, primary to prepare two panels carbon nanotube film sensors,
Resin carbon nano-tube film precast body is made in the abundant slipper dip carbon nano-tube film of resin after 2.5h.
Third step, the preparation of aligned carbon nanotube film/carbon fiber/epoxy resin composite material；
The orthogonal laying of prepreg is prepared into composite-material laminates, is received on a surface of laying along 90 ° of direction laying carbon
Mitron membrane strain sensor, wherein tooth edge lengths direction is consistent with 90 ° of directions, and carbon nanotube film sensors and fiber lay down interlayer are spread
Put 0.05mm thick fiberglass felt.The prepreg completed is solidified into 3h at 0.3MPa, 150 DEG C, carbon is obtained after furnace cooling and receives
Mitron film/epoxy resin carbon fiber composite material.In this way when sample is by 0 ° of stretching, carbon nano-tube film on the surface is attached
(90 °) of transverse direction strains of sample can be monitored.
4th step, carbon nano-tube film/epoxy resin carbon fiber composite material is laterally to strain monitoring
Carbon nano-tube film strain transducer conductive silver glue is connect with conductive silver wire, after solidifying 1h at 100 DEG C.It will answer
The electrode of condensation material is connected to external Estimate of Resistance for DC Low Resistance instrument, and the variation of incoming end resistance can be monitored in real time.It is multiple in carbon fiber
0 ° of application tensile load of condensation material records the variation of resistance value on resistance instrument, can calculate the reality of composite material transverse strain
Shi Bianhua.Fig. 9 show carbon nano-tube film when 90 ° of directions are pressurized, the relationship of resistance variations and transverse strain, strain sensitive because
Son is 2.6.
Embodiment 3:
Using preparation method provided by the invention, draw orientation is carried out by roller bearing, the carbon that degree of draft is 20% is prepared and receives
Mitron film, and it is further compound with carbon fiber/poly- aryne prepreg, and preparation can carry out vertical and horizontal strain monitoring simultaneously
Carbon fiber/poly- aryne composite material.Specific step is as follows:
The first step, the preparation of carbon nano-tube film；
Under the protective effect of inert gas, by the mixed liquor of ethyl alcohol, ferrocene and thiophene with the speed of 0.15ml/min
It is injected into 1300 DEG C of high temperature process furnances.Inert gas is the mixture of argon gas and hydrogen (volume ratio 1:1), and flow is
4000sccm.Continuous carbon nanotube aerogel is formed in the other end of high temperature process furnances, carbon nanometer is collected by wind
Pipe aeroge, wind width 3cm, diameter 0.5m.Carbon nanotube is obtained with ethyl alcohol sprinkling carbon nanotube aerogel after collection
Film obtains wide 3cm and thick 10 microns of carbon nano-tube film.It is parallel to axis direction cutting along collection device surface, is formed
The carbon nanotube band of 3cm wide about 3m long.
Second step, the preparation of carbon nanotube composite preform；
Carbon nano-tube film band obtained is subjected to drawing-off by the three-level roller system of differential, the revolving speed of roller bearing is respectively
5mm/min, 9mm/min, 12mm/min, while ethyl alcohol is sprayed during drawing-off convenient for the drawing-off of carbon nano-tube film, it obtains
The carbon nano-tube film that degree of draft is 20%.
Carbon nano-tube film obtained above is cut into U-shaped dentation using laser cutting method, wherein the long 20mm of tooth side length,
Wide 1mm, tooth side spacing are 0.5mm, form the sensor of a long 20mm, width 8.5mm, which is 20mm's by 6 segment length
Carbon streaking tube connects and composes.
Poly- aryne/carbon fiber prepreg is selected, is received using mold/isolation film/poly- aryne prepreg/porous tetrafluoro cloth/carbon
Mitron film/porous tetrafluoro cloth/poly- aryne prepreg/isolation film/mold laying mode is carried out at 60 DEG C, and heat is carried out under 7MPa
It presses, after 0.5h, resin is sufficiently impregnated carbon nano-tube film, and carbon nano-tube film precast body is made.
Third step, the preparation of aligned carbon nanotube film/carbon fiber/poly- aryne composite material；
Prepreg standard is respectively prepared into composite-material laminates to ply sequence laying, and respectively in two tables of preform
Face is along 0 ° and 90 ° of direction laying carbon nano-tube film strain transducer precast bodies, wherein sensor tooth edge lengths direction and monitoring
Direction is parallel, carbon nanotube film sensors and fiber lay down interlayer laying 0.05mm thickness aramid fiber mat.The prepreg completed is existed
0.4MPa, 110 DEG C/3h+120 DEG C/3h+140 DEG C/1h+150 DEG C/1h solidification, obtain carbon nano-tube film/carbon fiber after furnace cooling
Dimension/poly- aryne composite material.In this way when sample is stretched or is compressed, the carbon nano-tube film attached on the surface can be simultaneously
Monitor the longitudinal strain and transverse strain of sample.
4th step, carbon nano-tube film/epoxy resin carbon fiber composite material vertical and horizontal are to strain monitoring
Carbon nano-tube film strain transducer conductive silver glue is connect with conductive copper wire, after solidifying 1h at 100 DEG C.It will answer
The electrode of condensation material is connected to external Estimate of Resistance for DC Low Resistance instrument, and the variation of incoming end resistance can be monitored in real time.It is multiple in carbon fiber
Apply tensile load on condensation material, by record resistance instrument on resistance value variation, can calculate composite material in parallel with hang down
The strain variation of straight draw direction, wherein parallel drawing direction piezoresistance factor is up to 14, and stretched vertically direction is up to 5.5.
Embodiment 4:
Using preparation method provided by the invention, draw orientation is carried out by roller bearing, the carbon that degree of draft is 20% is prepared and receives
Mitron film, and composite membrane of polyvinyl alcohol is further prepared, the strain that can be used for monitoring thermoplastic composite different directions becomes
Change, the specific steps are as follows:
The first step, the preparation of carbon nano-tube film；
Under the protective effect of inert gas, by the mixed liquor of ethyl alcohol, ferrocene and thiophene with the speed of 0.15ml/min
It is injected into 1300 DEG C of high temperature process furnances.Inert gas is the mixture of argon gas and hydrogen (volume ratio 1:1), and flow is
4000sccm.Continuous carbon nanotube aerogel is formed in the other end of high temperature process furnances, carbon nanometer is collected by wind
Pipe aeroge, wind width 3cm, diameter 0.5m.Carbon nanotube is obtained with ethyl alcohol sprinkling carbon nanotube aerogel after collection
Film obtains wide 3cm and thick 10 microns of carbon nano-tube film.It is parallel to axis direction cutting along collection device surface, is formed
The carbon nanotube band of 3cm wide about 3m long.
Second step, the preparation of carbon nanotube composite preform；
Carbon nano-tube film band obtained is subjected to drawing-off by the three-level roller system of differential, the revolving speed of roller bearing is respectively
5mm/min, 9mm/min, 12mm/min, while ethyl alcohol is sprayed during drawing-off convenient for the drawing-off of carbon nano-tube film, it obtains
The carbon nano-tube film that degree of draft is 20%.
Carbon nano-tube film obtained above is cut into U-shaped dentation using laser cutting method, wherein the long 20mm of tooth side length,
Wide 1mm, tooth side spacing are 0.5mm, form the sensor of a long 20mm, width 4mm, the carbon which is 20mm by 3 segment length
Streaking tube connects and composes.
The carbon nano-tube film of cutting is placed in one 30min, places after taking-up by the polyvinyl alcohol water solution for preparing 5wt%
It on flat plate mold, is pressed using vacuum bag and guarantees that carbon nano-tube film is smooth, be placed in baking oven 70 DEG C, 3h promotes solvent volatilization.
Third step, the preparation of aligned carbon nanotube film/glass fiber/polypropylene composites；
By the unidirectional laying of glass fibre polypropylene prepreg, 200 DEG C are heated to, 5MPa pressure prepares composite material, uses
Carbon nano-tube film/polyvinyl alcohol sensor prepared by step 2 is sticked in composite material upper and lower surface by adhesive, is being tried in this way
When sample is stretched or compresses, the longitudinal strain of sample can be monitored simultaneously and laterally answer by attaching carbon nano-tube film on the surface
Become.
4th step, carbon nano-tube film/composite membrane of polyvinyl alcohol vertical and horizontal are to strain monitoring
Carbon nano-tube film strain transducer conductive silver glue is connect with conductive copper wire, after solidifying 1h at 100 DEG C.It will answer
The electrode of condensation material is connected to external Estimate of Resistance for DC Low Resistance instrument, and the variation of incoming end resistance can be monitored in real time.In glass fibre
Apply tensile load on composite material, by record resistance instrument on resistance value variation, can calculate composite material in parallel with
The strain variation in stretched vertically direction, wherein parallel drawing direction piezoresistance factor is up to 4.6, and stretched vertically direction is up to 2.7.
Claims (10)
1. a kind of carbon nano-tube film/composite material integrated molding strain monitoring method, includes the following steps:
(1) random carbon nano-tube film is prepared, and carbon nanotube alignment films are made；
(2) above-mentioned carbon nanotube alignment films are cut into flaky material, are processed into U-shaped dentation carbon nano-tube film strain transducer；
(3) preimpregnation of carbon nano-tube film, the above-mentioned carbon nano-tube film strain transducer processed and resin progress is compound, it is pre- solid
Change, becomes carbon nano-tube film precast body；
(4) laying of composite material obtains the upper and lower surface that above-mentioned carbon nano-tube film precast body is laid on material prepreg
The composite material cure under pressure is formed the carbon nanotube film composite material that can carry out strain monitoring by composite material；
(5) connection electrode material, on-line monitoring strain, the electrode that will can carry out the carbon nanotube film composite material of strain monitoring connect
External circuits are connected to, change the shape of composite material by a variety of loading modes, the variation of resistance instrument is recorded, calculates strain
Real-time change；
Wherein in the step (4) by prepreg according to laying sequence laying at composite material preformed body, and upper and lower two
Surface monitors two mutually to hang down respectively along mutually perpendicular direction laying carbon nano-tube film strain transducer precast body respectively
The composite material in direction strains.
2. monitoring method according to claim 1, it is characterized in that random carbon nano-tube film is by tens in the step (1)
Carbon nanotube thin layer to several hundred thickness degree not less than 0.1 μm is constituted, and carbon nanotube Two dimensional Distribution in pellicular front randomly takes
To not along thickness distribution.
3. monitoring method according to claim 1, it is characterized in that in the step (1) random carbon nano-tube film molding
In the process, carbon nanotube is formed simultaneously with carbon nano-tube film；The carbon nano-tube film has good drawdown simultaneously, can pass through
The orientation of mechanical commutation draft change carbon nanotube.
4. monitoring method according to claim 1, it is characterized in that changing carbon using more roller systems in the step (1)
The degree of drafts of nanotube films prepares carbon nanotube alignment films, the velocity of rotation of each roller bearing from feed end to discharge end rate successively
It is incremented by, the rate of extension of each roller bearing is 5mm/min-25mm/min.
5. monitoring method according to claim 1, it is characterized in that sheet carbon nanotube will be cut into the step (2)
Alignment films are processed into required U-shaped dentation, and carbon nano-tube film strain transducer is made.
6. monitoring method according to claim 1, it is characterized in that resin uses thermosetting property or thermoplasticity in the step (3)
Resin is received according to mold-prepreg-tetrafluoro cloth-carbon nano-tube film-with holes tetrafluoro cloth-prepreg-with holes tetrafluoro cloth-carbon with holes
Mitron film-tetrafluoro with holes cloth-prepreg-mold sequence carries out hot pressing in hot press, and the primary carbon for preparing multilayer preimpregnation is received
Mitron film；For thermoplastic resin, it is dissolved in polar solvent, is configured to the resin solution of 1wt%-5wt%, impregnated carbon nanometer
Periosteum is pressed using vacuum bag thereafter by carbon nano-tube film laying and mold and guarantees that carbon nano-tube film is smooth, while promoting solvent
Volatilization.
7. monitoring method according to claim 6, used in prepreg resin mass fraction be greater than 38wt%, in heat
It is lower than the temperature of 20-30 DEG C of resin system solidification temperature in press, hot pressing is carried out with the pressure of 5-10MPa.
8. monitoring method according to claim 6, it is characterized in that the resin system refers to polyethylene, polyvinyl alcohol, ring
Any one or more in oxygen resin, bismaleimide resin, poly- aryl ethane resin and polyimides.
9. monitoring method according to claim 1, it is characterized in that for the prepreg and carbon nanotube of conductive fiber preparation
Be added a layer insulating between film sensors, the insulating layer be glass fibre mat, electrician, aramid fiber mat or
Plastic film, thickness 0.02-0.1mm.
10. monitoring method according to claim 1, it is characterized in that in the step (5), on-line monitoring strain are as follows: when multiple
When longitudinal stretching occurs for condensation material, monitor the variation of resistance value divided by the strain sensitive of carbon nano-tube film by upper surface
The longitudinal strain of material can be obtained in coefficient, by the variation of following table surface resistance divided by the strain sensitive coefficient of carbon nano-tube film
The transverse strain of material can be obtained, the change of upper surface resistance value is composite material divided by the change of following table surface resistance
Poisson's ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611230481.0A CN106643464B (en) | 2016-12-27 | 2016-12-27 | A kind of composite material based on carbon nano-tube film is respectively to strain monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611230481.0A CN106643464B (en) | 2016-12-27 | 2016-12-27 | A kind of composite material based on carbon nano-tube film is respectively to strain monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106643464A CN106643464A (en) | 2017-05-10 |
| CN106643464B true CN106643464B (en) | 2019-02-22 |
Family
ID=58831717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611230481.0A Active CN106643464B (en) | 2016-12-27 | 2016-12-27 | A kind of composite material based on carbon nano-tube film is respectively to strain monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106643464B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181029B (en) * | 2018-01-10 | 2020-01-07 | 沈阳航空航天大学 | Method for monitoring strain of fiber reinforced composite material in multiple directions by carbon nano paper sensor |
| CN108489375B (en) * | 2018-02-06 | 2022-10-28 | 常州大学 | Manufacturing method of two-dimensional sensor based on carbon nano tube |
| CN108692846A (en) * | 2018-05-09 | 2018-10-23 | 中南大学 | A kind of hot-press solidifying composite product and mold interface stress monitoring system |
| CN109520409A (en) * | 2018-10-28 | 2019-03-26 | 北京工业大学 | A kind of flexible strain transducer and experimental method based on the production of CNT fiber mechanical resistance performance |
| CN109502570B (en) * | 2018-12-14 | 2020-08-25 | 郑州大学 | Conductive large-strain carbon nanotube composite film, preparation method and test method |
| CN110002431B (en) * | 2019-03-27 | 2020-12-18 | 华中科技大学 | Carbon nanotube film and preparation method thereof |
| CN110906858B (en) * | 2019-12-03 | 2022-04-19 | 观云(山东)智能科技有限公司 | Non-woven composite material, structural strain sensor, distributed monitoring system and method |
| CN112700908B (en) * | 2020-12-16 | 2023-01-31 | 中国科学院苏州纳米技术与纳米仿生研究所 | Intelligent composite material and preparation method and application thereof |
| CN113514174B (en) * | 2021-03-10 | 2023-08-01 | 深圳烯湾科技有限公司 | Stress detection assembly for pressure gas storage container and pressure gas storage container |
| CN113834418B (en) * | 2021-09-06 | 2023-04-18 | 电子科技大学 | Flexible strain sensor with adjustable Poisson ratio |
| CN114739354B (en) * | 2022-03-25 | 2023-11-14 | 广东技术师范大学 | Strain sensor and preparation method thereof |
| CN116628617B (en) * | 2023-07-25 | 2023-09-22 | 值数科技(北京)有限公司 | Method for realizing miniature strain monitoring based on nanocomposite |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087101A (en) * | 2009-12-04 | 2011-06-08 | 清华大学 | Device and method for measuring strain |
| CN103808247A (en) * | 2012-11-06 | 2014-05-21 | 沈阳航空航天大学 | Preparation method for strain sensor based on carbon nano tube three-dimensional network film |
| CN103921368A (en) * | 2014-04-14 | 2014-07-16 | 北京航空航天大学 | High-orientation carbon nano tube compound prefabricated body and preparation method thereof |
| CN104142118A (en) * | 2013-05-10 | 2014-11-12 | 雅马哈株式会社 | Strain sensor |
| CN106009677A (en) * | 2016-07-18 | 2016-10-12 | 深圳市尚智工程技术咨询有限公司 | Nanometer conductive rubber sensing unit and method for preparing same |
| CN106183212A (en) * | 2016-07-12 | 2016-12-07 | 上海复合材料科技有限公司 | Structure/heating integral composite and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6469484B2 (en) * | 2015-03-13 | 2019-02-13 | セイコーインスツル株式会社 | Strain sensor |
-
2016
- 2016-12-27 CN CN201611230481.0A patent/CN106643464B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087101A (en) * | 2009-12-04 | 2011-06-08 | 清华大学 | Device and method for measuring strain |
| CN103808247A (en) * | 2012-11-06 | 2014-05-21 | 沈阳航空航天大学 | Preparation method for strain sensor based on carbon nano tube three-dimensional network film |
| CN104142118A (en) * | 2013-05-10 | 2014-11-12 | 雅马哈株式会社 | Strain sensor |
| CN103921368A (en) * | 2014-04-14 | 2014-07-16 | 北京航空航天大学 | High-orientation carbon nano tube compound prefabricated body and preparation method thereof |
| CN106183212A (en) * | 2016-07-12 | 2016-12-07 | 上海复合材料科技有限公司 | Structure/heating integral composite and preparation method thereof |
| CN106009677A (en) * | 2016-07-18 | 2016-10-12 | 深圳市尚智工程技术咨询有限公司 | Nanometer conductive rubber sensing unit and method for preparing same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106643464A (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106643464B (en) | A kind of composite material based on carbon nano-tube film is respectively to strain monitoring method | |
| Mohammadzadehmoghadam et al. | Recent progress in electrospun nanofibers: Reinforcement effect and mechanical performance | |
| CN103921368B (en) | A kind of high-orientation carbon nanotube composite preform and preparation method thereof | |
| Liu et al. | Producing superior composites by winding carbon nanotubes onto a mandrel under a poly (vinyl alcohol) spray | |
| CN107189354B (en) | A kind of preparation method of graphene nanometer sheet enhancing carbon fibre composite | |
| Zhang et al. | Integrated damage sensing in fibre-reinforced composites with extremely low carbon nanotube loadings | |
| CN102794952B (en) | Preparation method of CFRP (Carbon Fiber Reinforced Plastics) composite material with height orientation MWNTs and synchronously reinforced and toughened by hybrid nanofiber | |
| Vijay Kumar et al. | Electrospun nanofiber interleaving in fiber reinforced composites—Recent trends | |
| CN105073848A (en) | Carbon-fiber-reinforced thermoplastic-resin composite material and molded body using same | |
| Razavi et al. | Effect of neat and reinforced polyacrylonitrile nanofibers incorporation on interlaminar fracture toughness of carbon/epoxy composite | |
| Steinke et al. | Laser induced graphene for in-situ ballistic impact damage and delamination detection in aramid fiber reinforced composites | |
| Lu et al. | Real time monitoring of the curing degree and the manufacturing process of fiber reinforced composites with a carbon nanotube buckypaper sensor | |
| CN105220259A (en) | A kind of polymer nanocomposite conductive fiber and preparation method thereof | |
| Liu et al. | Laser direct writing of a multifunctional superhydrophobic composite strain sensor with excellent corrosion resistance and Anti-Icing/Deicing performance | |
| Yang et al. | Uniaxial tensile and impact investigation of carbon-fabric/polycarbonate composites with different weave tow widths | |
| US10717051B2 (en) | Carbon nanotube membrane systems and methods of synthesis | |
| Wang et al. | Fiber-welded ciliated-like nonwoven fabric nano-composite multiscale architectures for superior mechanical and electromagnetic shielding behaviors | |
| CN106183212A (en) | Structure/heating integral composite and preparation method thereof | |
| CN113002024A (en) | Method for toughening carbon fiber prepreg between nano-particle polymer composite nano-fiber film layers | |
| CN107674385B (en) | A kind of preparation method of toughening drop resistance carbon fibre composite | |
| Xiong et al. | Preparation and thermal properties of soluble poly (phthalazinone ether sulfone ketone) composites reinforced with multi-walled carbon nanotube buckypaper | |
| CN115485423B (en) | Bicomponent or multicomponent fibers for large composite parts | |
| CN110906858B (en) | Non-woven composite material, structural strain sensor, distributed monitoring system and method | |
| US20220235191A1 (en) | Fibers, prepreg materials, compositions, composite articles, and methods of producing composite articles | |
| JP2012236897A (en) | Fiber-reinforced resin molding material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |