CN105548269B - A kind of flexible wearable stress sensing basic unit and preparation method thereof based on carbonization cotton - Google Patents
A kind of flexible wearable stress sensing basic unit and preparation method thereof based on carbonization cotton Download PDFInfo
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- CN105548269B CN105548269B CN201510890704.5A CN201510890704A CN105548269B CN 105548269 B CN105548269 B CN 105548269B CN 201510890704 A CN201510890704 A CN 201510890704A CN 105548269 B CN105548269 B CN 105548269B
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- polydimethylsiloxane
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
Abstract
Based on the flexible wearable stress sensing basic unit of carbonization cotton, cotton layer is gripped by two panels PDMS flexible substrates, and the two sides of cotton layer have the conducting adhesive cloth for being covered with golden film as extraction electrode.Preparation process is as follows：Cotton textile is cut into required size, is subsequently placed under the ar gas environment that temperature is 600~800 DEG C and calcines 25~35 min；The conducting adhesive cloth for being covered with golden film as the two panels of extraction electrode is separately connected to the two sides of cotton in the carbonized, cotton and the conducting adhesive cloth tiling for being covered with golden film are tightly attached in PDMS flexible substrates；By cotton and it is covered with the conducting adhesive cloth of golden film and PDMS flexible substrates are placed in 8~12 min of drying under 60~70 DEG C of atmospheric environment；Another PDMS flexible substrate is tightly attached to cotton and is covered with the another side of the conducting adhesive cloth of golden film；Layer structure is integrally placed at 8~12 min of drying under 60~70 DEG C of atmospheric environment, obtains the flexible wearable stress sensing basic unit based on carbonization cotton.
Description
Technical field
Flexible wearable stress stress sensing basic unit and preparation method thereof is prepared the present invention relates to a kind of, especially one
Kind is based on the common textile such as cotton, low cost, simple for process, the good wearable stress sensing basic unit of stability
And preparation method thereof.
Background technology
Flexible wearable strain gauge is a kind of novel strain gauge, can be used for software robot's technology, tangible
The fields such as display screen, Medical Devices, electronic skin and energy resource collecting.
Currently, strain gauge mainly rides in variation, pressure drag and the piezoelectricity effect of stress or resistance and capacitance under strain
It answers, triboelectric effect etc..By traditional strain gauge of metal resistance variations under strain and the piezoresistive effect of semiconductor,
Its application receives the limitation of system flexibility.In recent years, including carbon nanomaterial, metal nanoparticle, nano wire and nano oxygen
Various nano materials including change zinc be used to prepare flexibility stress strain transducer.It is this based on nano material
Flexible sensor mainly by depositing nano-materials to flexible substrate either by nanomaterial assembly at macrostructure.
In this kind of sensor, the sensing unit based on resistance variations shows apparent advantage, and if preparation process is simple, low energy consumption
Deng.
Much the strain gauge based on resistance variations is based on the reticular structure of nano material.Under stress, net
The resistance of shape structure can change.However, the preparation process of nano material reticular structure is complex, and repeatability is difficult to protect
Card.Daily textile fabric such as cotton clothes etc. used, have natural reticular structure and very excellent flexibility.Original cotton
Equal textiles are insulating materials, are changed into fibrous material with good conductivity after high temperature cabonization.These features make cotton at
For a kind of good candidate material in flexible sensing field.But there are no the pliable pressure biographies based on cotton so far
The relevant report of sensor.
Invention content
The object of the present invention is to provide a kind of low costs, and low energy consumption, preparation process is simple, reproducible, and stability is good
Based on the flexible wearable stress sensing basic unit and preparation method thereof of carbonization cotton, overcome the deficiencies in the prior art.
The flexible wearable stress sensing basic unit based on carbonization cotton of the present invention, includes positioned at the complete of middle layer
The cotton layer of carbonization, cotton layer are gripped by two panels polydimethylsiloxane flexible substrate, are covered in the two sides of cotton layer
The conducting adhesive cloth of golden film as extraction electrode, be covered with golden film conducting adhesive cloth be located at two panels polydimethylsiloxane flexible substrate it
Between.
The flexible wearable stress sensing basic unit based on carbonization cotton of the present invention, wherein the cotton with carry
There is elargol connection between the conducting adhesive cloth of golden film.
The preparation method of the flexible wearable stress sensing basic unit based on carbonization cotton of the present invention, steps are as follows：
A. cotton textile is cut into required size, is subsequently placed under the ar gas environment that temperature is 600~800 DEG C and forges
25~35 min are burnt, the cotton of carbonization is obtained；
B., the conducting adhesive cloth that golden film is covered with as the two panels of extraction electrode is separately connected to the both sides of cotton in the carbonized
At side, then cotton is tightly attached to the conducting adhesive cloth tiling for being covered with golden film in polydimethylsiloxane flexible substrate；
C. by cotton and it is covered with the conducting adhesive cloth of golden film and polydimethylsiloxane flexible substrate is placed in 60~70 DEG C of air
8~12 min are dried under environment；
D. another polydimethylsiloxane flexible substrate is tightly attached to cotton and is covered with the another side of the conducting adhesive cloth of golden film,
Make two panels polydimethylsiloxane flexible substrate clamping cotton and be covered with the two sides of the conducting adhesive cloth of golden film, forms layer structure；
E. the layer structure that Step d obtains is integrally placed at 8~12 min of drying under 60~70 DEG C of atmospheric environment, obtains base
In the flexible wearable stress sensing basic unit of carbonization cotton.
The preparation method of the flexible wearable stress sensing basic unit based on carbonization cotton of the present invention, wherein described
Polydimethylsiloxane flexible substrate is leather hard, and the polydimethylsiloxane flexible substrate preparation method of the leather hard is：
The liquid polydimethylsiloxane that thickness is 300 ~ 400 μm is positioned under 55~65 DEG C of atmospheric environment and dries 15~19
Min obtains the polydimethylsiloxane of leather hard；
It is added curing agent in the liquid polydimethylsiloxane, the quality proportioning of polydimethylsiloxane and curing agent is：
10 ︰ 0.5~1.5；
Cotton is covered with golden film conducting adhesive cloth with surface and is connected with elargol.
The present invention is using the common textile such as cotton as raw material, after high temperature cabonization, using flexible substrate as guarantor
A kind of high flexibility, highly sensitive and stability wearable stress sensing basic unit is made in sheath and outer packing.The spinnings such as cotton
Fabric has natural periodic reticular structure, this is reproducible to manufacture, and highly sensitive sensor provides advantage.Cotton
Cloth, conducting adhesive cloth and polydimethylsiloxane（PDMS）Flexible fabulous, the material that can be arbitrarily bent is belonged to, this, which is also manufacture, to wear
The sensor worn provides possibility.Product has that low cost, low energy consumption, preparation process is simple, reproducible, stability is good
Advantage.
Description of the drawings
Fig. 1 is the optical photograph of cotton after carbonization；
Fig. 2 is the electron micrograph of cotton after carbonization；
Fig. 3 is the structure chart of the flexible wearable stress sensing basic unit based on carbonization cotton；
Fig. 4 be flexible wearable stress sensing basic unit I-V characteristic curve under stress based on carbonization cotton and
The transient response curve graph of electric current；
Fig. 5 is phase of the flexible wearable stress sensing basic unit based on carbonization cotton under pressure, bending and torsion
To resistance change curves figure；
Fig. 6 be based on carbonization cotton flexible wearable stress sensing basic unit under bending with 1 second for the period 100
Secondary loop test curve graph；
Fig. 7 be based on carbonization cotton flexible wearable stress sensing basic unit under bending with 5 seconds winks for the period
When response test curve graph
Fig. 8 is to test song in relaxation time of the flexible wearable stress sensing basic unit based on carbonization cotton under bending
Line chart；
Fig. 9 is the current-responsive curve that the flexible wearable stress sensing basic unit based on carbonization cotton measures door folding
Figure；
Figure 10 is the electric current sound that the flexible wearable stress sensing basic unit based on carbonization cotton measures articulations digitorum manus movement
Answer curve graph.
Specific implementation mode
The flexible wearable stress sensing basic unit based on carbonization cotton of the present invention, includes positioned at the complete of middle layer
The cotton layer of carbonization, cotton layer are gripped by two panels polydimethylsiloxane flexible substrate, are covered in the two sides of cotton layer
The conducting adhesive cloth of golden film as extraction electrode, be covered with golden film conducting adhesive cloth be located at two panels polydimethylsiloxane flexible substrate it
Between.There is elargol connection between cotton and conducting adhesive cloth with golden film.
The preparation method of the flexible wearable stress sensing basic unit based on carbonization cotton of the present invention, steps are as follows：
A. cotton textile is cut into required size, it is 600 DEG C or 650 DEG C or 700 DEG C or 750 DEG C to be subsequently placed in temperature
Or calcine 25 min or 30 min or 35 min under 800 DEG C of ar gas environment, calcination temperature between 600~800 DEG C,
Calcination time obtains the cotton of carbonization between 25~35 min；
B., the conducting adhesive cloth that golden film is covered with as the two panels of extraction electrode is separately connected to the both sides of cotton in the carbonized
At side, then cotton is tightly attached to the conducting adhesive cloth tiling for being covered with golden film in polydimethylsiloxane flexible substrate；
C. by cotton and it is covered with the conducting adhesive cloth of golden film and polydimethylsiloxane flexible substrate is placed in 60 DEG C or 65 DEG C or 70
DEG C atmospheric environment under dry 8 min or 9 min or 10 min or 11 min or 12 min, wherein temperature 60~70 DEG C it
Between, the time is between 8~12 min；,
D. another polydimethylsiloxane flexible substrate is tightly attached to cotton and is covered with the another side of the conducting adhesive cloth of golden film,
Make two panels polydimethylsiloxane flexible substrate clamping cotton and be covered with the two sides of the conducting adhesive cloth of golden film, forms layer structure（Such as
Shown in Fig. 3）；
E. the layer structure that Step d obtains is integrally placed under 60 DEG C or 65 DEG C or 70 DEG C of atmospheric environment and dries 8 min
Or 9 min or 10 min or 11 min or 12 min, wherein temperature between 60~70 DEG C, the time 8~12 min it
Between, obtain the flexible wearable stress sensing basic unit based on carbonization cotton.
Polydimethylsiloxane flexible substrate is leather hard, the polydimethylsiloxane flexible substrate preparation method of leather hard
For：It is that 300 μm or 350 μm or 400 μm of liquid polydimethylsiloxane is positioned over 55 DEG C or 60 DEG C or 65 DEG C big by thickness
15 min or 17 min or 19 min are dried under compression ring border, obtain the polydimethylsiloxane of leather hard, wherein liquid poly- two
The thickness of methyl-monosilane is between 300~400 μm, and temperature is between 55~65 DEG C, and the time is in 15~19 min
Between.
It is added curing agent in the liquid polydimethylsiloxane, the quality proportioning of polydimethylsiloxane and curing agent is：
10 ︰ 0.5 or 1 or 1.5, i.e., between 10 ︰ 0.5~1.5.Cotton is covered with golden film conducting adhesive cloth with surface and is connected with elargol.
To the specific test result of the product of the present invention：
Cotton is by carbon after the optical photograph of cotton and electron micrograph can be seen that carbonization after Fig. 1,2 carbonizations
Fiber line is interlaced to be entwined.The short texture is porous, and under stress, contacting between carbon fiber and between carbon line can send out
It is raw to change, and then change the appearance resistance of entire primitive.The variation of contact resistance under stress is the sensor mechanism of primitive.
Fig. 3 is the structure principle chart of the flexible wearable stress sensing basic unit based on carbonization cotton.Cotton after carbonization
Cloth is clipped between two panels PDMS flexible, and the resistance variations of cotton under stress are recorded by two extraction electrodes.
Fig. 4 is that a block size is 2 × 1mm2Cotton made of based on carbonization cotton flexible wearable stress sensing base
The transient response curve of the I-V characteristic curve and electric current of this unit under stress.In experiment test, cotton can be born more than 5kPa
Pressure without the permanent change on any structure and electrology characteristic.Under pressure, the resistance of primitive reduces.Pressure
The moment that power is removed, electric current complete transitory in 35ms.
Flexible wearable stress sensing basic unit based on carbonization cotton has significantly under pressure, bending and torsion
Resistance variations, and available exponential type curve is described.From fig. 5, it can be seen that index of resistance reduces under pressure and bending,
The speed that resistance reduces under torsion first rises to be declined afterwards, and when torsion angle is at 90 ° or so, pace of change reaches maximum, changes
Two sections of exponential type curves of Cheng Keyong are described.According to matched curve, the producible maximum resistance under pressure, bending and torsion
Variation is respectively 26.5%, 68.9% and 39.%.Under the application environment for being used for the sensing primitive there is bending, it is up to very high
Responsiveness.
Fig. 6 is that the flexible wearable stress sensing basic unit based on carbonization cotton is tested by the cycle characteristics in period of 1s
Curve.Good stability is shown under being recycled at 100 times.It can be seen that pair from using 5s as the transient response curve in period
Quickly bending has very sharp peak response, shows high signal-to-noise ratio.When the flexible wearable based on carbonization cotton
When stress sensing basic unit returns to original state, the flexible wearable stress sensing basic unit resistance based on carbonization cotton is simultaneously
It is non-immediate to return to initial value, but the higher state of resistance value is first jumped to, however gradually relax towards original state.This relaxation is come
The dislocation occurred between carbon fiber line during bending, later carbon fiber line can gradually relax towards the closest and jail
Solid state, therefore resistance is gradually reduced.The relaxation process that resistance changes over time can be fitted with exponential function, and then can be with
Calculate the relaxation time.It is 3.43s that can obtain mean time of relaxation from Fig. 8.
Fig. 9 is that electric current of the flexible wearable stress sensing basic unit based on carbonization cotton in the folding of test gate is rung
Answer curve.The noise of response curve is small, and response curve is stablized.Figure 10 is the flexible wearable stress sensing base based on carbonization cotton
Current-responsive curve of this unit when testing articulations digitorum manus movement, equally shows the noise of very little.When the length of primitive can
When covering two articulations digitorum manus, it is which joint is bent that can be told from response curve.
Claims (3)
1. a kind of flexible wearable stress sensing basic unit based on carbonization cotton, it is characterised in that：Including being located at middle layer
Carbonization cotton layer, cotton layer is gripped by two panels polydimethylsiloxane flexible substrate, in the two sides of cotton layer
There is the conducting adhesive cloth for being covered with golden film as extraction electrode, the conducting adhesive cloth for being covered with golden film is located at two panels polydimethylsiloxane flexible liner
Between bottom.
2. the flexible wearable stress sensing basic unit according to claim 1 based on carbonization cotton, it is characterised in that：
There is elargol connection between the cotton and the conducting adhesive cloth with golden film.
3. a kind of preparation method of the flexible wearable stress sensing basic unit based on carbonization cotton, it is characterised in that：Step
It is as follows：
A. cotton textile is cut into required size, is subsequently placed under the ar gas environment that temperature is 600~800 DEG C and calcines 25
~35 min obtain the cotton of carbonization；
B. the conducting adhesive cloth that golden film is covered with as the two panels of extraction electrode is separately connected at the two sides of cotton in the carbonized,
Then cotton is tightly attached to the conducting adhesive cloth tiling for being covered with golden film in polydimethylsiloxane flexible substrate；
C. by cotton and it is covered with the conducting adhesive cloth of golden film and polydimethylsiloxane flexible substrate is placed in 60~70 DEG C of atmospheric environment
8~12 min of lower drying；
D. another polydimethylsiloxane flexible substrate is tightly attached to cotton and is covered with the another side of the conducting adhesive cloth of golden film, make two
Piece polydimethylsiloxane flexible substrate is clamped cotton and is covered with the two sides of the conducting adhesive cloth of golden film, forms layer structure；
E. the layer structure that Step d obtains is integrally placed at 8~12 min of drying under 60~70 DEG C of atmospheric environment, obtained based on carbon
Change the flexible wearable stress sensing basic unit of cotton；
The polydimethylsiloxane flexible substrate is leather hard, the polydimethylsiloxane flexible substrate system of the leather hard
Preparation Method is：The liquid polydimethylsiloxane that thickness is 300 ~ 400 μm is positioned under 55~65 DEG C of atmospheric environment and is dried
Dry 15~19 min, obtain the polydimethylsiloxane of leather hard；
It is added curing agent in the liquid polydimethylsiloxane, the quality proportioning of polydimethylsiloxane and curing agent is：10 ︰
0.5~1.5；
Cotton is covered with golden film conducting adhesive cloth with surface and is connected with elargol.
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| CN201510890704.5A CN105548269B (en) | 2015-12-07 | 2015-12-07 | A kind of flexible wearable stress sensing basic unit and preparation method thereof based on carbonization cotton |
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| CN201510890704.5A CN105548269B (en) | 2015-12-07 | 2015-12-07 | A kind of flexible wearable stress sensing basic unit and preparation method thereof based on carbonization cotton |
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| CN105548269B true CN105548269B (en) | 2018-07-13 |
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| CN105869720B (en) * | 2016-05-25 | 2017-09-19 | 东华大学 | A kind of elastic conduction membrane material and preparation method thereof |
| CN108896219B (en) * | 2018-07-06 | 2019-05-21 | 清华大学 | Flexible bionic electronic skin and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598529A (en) * | 2008-05-19 | 2009-12-09 | 香港理工大学 | The method for preparing fabric strain sensors |
| CN202793668U (en) * | 2012-02-16 | 2013-03-13 | 安德润普科技开发（深圳）有限公司 | Flexible pressure sensor |
| CN104790224A (en) * | 2014-01-21 | 2015-07-22 | 吴江市南华纺织整理厂 | Production method of water proof and breathable fabric |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598529A (en) * | 2008-05-19 | 2009-12-09 | 香港理工大学 | The method for preparing fabric strain sensors |
| CN202793668U (en) * | 2012-02-16 | 2013-03-13 | 安德润普科技开发（深圳）有限公司 | Flexible pressure sensor |
| CN104790224A (en) * | 2014-01-21 | 2015-07-22 | 吴江市南华纺织整理厂 | Production method of water proof and breathable fabric |
Non-Patent Citations (1)
| Title |
|---|
| 本征导电纤维集合体的电一力学性能及其作为应变、压力传感的性能分析;张辉;《中国博士学位论文全文数据库 工程科技Ⅰ辑》;20110315(第03期);77页第5行，78页第2段 * |
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