CN109827682A - A kind of sensor dielectric layer and its preparation method and application - Google Patents
A kind of sensor dielectric layer and its preparation method and application Download PDFInfo
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- CN109827682A CN109827682A CN201910227098.7A CN201910227098A CN109827682A CN 109827682 A CN109827682 A CN 109827682A CN 201910227098 A CN201910227098 A CN 201910227098A CN 109827682 A CN109827682 A CN 109827682A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
Abstract
The present invention provides a kind of sensor dielectric layers and its preparation method and application.Dielectric layer provided by the invention includes porous material and is filled in the intrapore ion conductor liquid of the porous material, and the porous material is opaque or trnaslucent materials.The preparation method includes: to mix ion conductor liquid with porous material, stands, obtains the sensor dielectric layer.Sensor dielectric layer provided by the invention has achieved the purpose that for opaque material to be changed into transparent material by filling ion conductor liquid, and improves the sensing capabilities of sensor, can be applied to the senser element etc. of production high transparency.
Description
Technical field
The invention belongs to sensor technical field, it is related to a kind of sensor dielectric layer and its preparation method and application.
Background technique
The variation that testee can be occurred for the senser element of different operating principle be converted into electric signal or other needed for
The information of form exports, and meets the transmission of information, handles, and stores, display, the requirement of record and control, therefore they are in people
Life in play very important effect.Wherein, the capacitive pressure that external force effect is perceived by capacitance variation passes
For sensor since its structure is simple, stability is good, and the advantages such as sensitivity height are by extensive concern.In recent years, by sensor dielectric
The layer improved means of structure, so that capacitance pressure transducer, is in performance parameters sides such as flexibility, sensitivity, stability and detection limits
Face all achieves the progress to attract people's attention.However, the production of the pressure sensor of high transparency still suffers from huge choose at present
War, main reasons is that keeping high transparency and high sensing capabilities simultaneously is conflicting for sensor dielectric layer.
In other words, the sensing as dielectric layer such as common high transparency material such as dimethyl silicone polymer, polyester, polyimides, glass
The sensitivity of device is low, influences actual application；And there is porous or surface micro-structure dielectric layer although can be improved sensor
Sensitivity, but seriously reduce device entirety transparency.Based on this, the dielectric layer of a kind of highly transparent and high sensitivity is prepared
Sensor for making high transparency has great importance.
CN105865667A discloses a kind of condenser type pliable pressure sensor and its system based on micro-structural dielectric layer
Preparation Method, including upper flexible substrates and lower flexible substrates are attached to the upper conductive layer of flexible substrates inner surface and are attached to down
The lower conductiving layer of flexible substrates inner surface is equipped with micro-structural dielectric layer between the upper conductive layer and lower conductiving layer.Although
The condenser type pliable pressure sensor of the invention has by the design to conditions such as dielectric layer microstructure aspects, size and distributions
Effect has adjusted sensor performance, realizes to different sensitivity, the condenser type pliable pressure sensor production of test scope.However,
The building of micro-structure inevitably increases the mist degree of dielectric layer, reduces the whole clearing degree of sensor, influences sensor
Use scope.
CN106017748A discloses a kind of condenser type pliable pressure sensor and its system based on composite material dielectric layer
Preparation Method, including upper flexible substrates and lower flexible substrates are attached to the upper conductive layer of flexible substrates inner surface and are attached to down
The lower conductiving layer of flexible substrates inner surface is equipped with composite material dielectric layer between upper conductive layer and lower conductiving layer.The invention exists
It is doped in dielectric layer macromolecule resin including metallic conductor, ferroelectric ceramics, carbon material and organic semiconducting materials, is effectively mentioned
The high sensitivity of condenser type pliable pressure sensor.Although the invention is realized through composite dielectric layer, to improve device sensitive
The purpose of degree, but it is identical, it does not prepare transparent yet and highly sensitive dielectric layer can be provided.
CN109288500A discloses a kind of wearable clothes sensor and its preparation method and application, described in the program
Clothes sensor successively includes tissue layer, first electrode layer, dielectric layer and the second electrode lay from top to bottom；Wherein, the dielectric
Layer has supported ion liquid on porous structure and the hole wall of the dielectric layer.Though the sensor of the program has relatively good soft
Property, but the sensor transparency of the program is poor, influences the application of sensor.
Therefore, it is necessary to develop a kind of flexible and transparent and can provide highly sensitive dielectric layer to meet high transparency sensor
It is required that.
Summary of the invention
Aiming at the above shortcomings existing in the prior art, the purpose of the present invention is to provide a kind of sensor dielectric layer and its
Preparation method and purposes.Sensor dielectric layer provided by the invention is capable of providing high sensitivity, and is transparent dielectric layer, can have
Flexible, preparation process is simple, and low raw-material cost is conducive to large-scale industrial production.
To achieve this purpose, the present invention adopts the following technical scheme:
In a first aspect, the present invention provides a kind of sensor dielectric layer, the dielectric layer includes porous material and is filled in
The intrapore ion conductor liquid of porous material, the porous material are opaque or trnaslucent materials.
In the present invention, the sensor dielectric layer high sensitivity, translucency is good, and can have flexibility.The present invention mentions
Although the dielectric layer of confession is evenly distributed in porous material using opaque or trnaslucent materials, ion conductor liquid
Hole in, and the coarse structure of porous material surface itself is not filled up completely.This unique mode can be mentioned significantly
The transparency of high opaque or translucent porous material.Also, under external force, ion activity solution with micro-structure
Common presence can also make sensor form a kind of electric double layer, so as to greatly improve the sensing capabilities of sensor.
In the present invention, the opaque material refers to that transparency is 0% material, and trnaslucent materials refers to that transparency is not high
In 10% material.
" comprising " of the present invention, it is intended that it can also include other components, these other components exceptionally except described group
Assign cloth different characteristics.In addition to this, " comprising " of the present invention, may be replaced by enclosed " for " or
" by ... form ".
It is used as currently preferred technical solution below, but not as the limitation to technical solution provided by the invention, leads to
Following preferred technical solution is crossed, can preferably reach and realize technical purpose and beneficial effect of the invention.
As currently preferred technical solution, the porous material is flexible material.
Preferably, the porous material includes cloth, paper, plastic foam, polyimide porous membrane, dimethyl silicone polymer
Perforated membrane, polyvinylidene fluoride porous film, polystyrene porous membrane, porous polylactic acid film, polypropylene porous film, polyvinyl chloride are porous
In film, polyethylene porous membrane, fibrination pore membrane, cellulose acetate perforated membrane or nitrocellulose perforated membrane any one or
At least two combination.It is typical but be non-limiting combination and have: the combination of cloth and paper, plastic foam and polyimide foraminous
The combination of film, the combination of polyvinylidene fluoride porous film and dimethyl silicone polymer perforated membrane, polystyrene porous membrane, polylactic acid are more
The combination of pore membrane and polypropylene porous film, the combination of polyvinyl chloride perforated membrane, polyethylene porous membrane and cellulose acetate perforated membrane,
The combination of cloth, paper, plastic foam and polyimide porous membrane, dimethyl silicone polymer perforated membrane, polyvinylidene fluoride porous film,
The combination of polystyrene porous membrane, fibrination pore membrane, porous polylactic acid film and polypropylene porous film, polyimide porous membrane,
Dimethyl silicone polymer perforated membrane, polyvinyl chloride perforated membrane, polyethylene porous membrane, fibrination pore membrane, cellulose acetate are porous
The combination etc. of film and nitrocellulose perforated membrane, preferably polyvinylidene fluoride porous film.
Preferably, the aperture of the porous material is 0.01-100 μm, such as 0.01 μm, 1 μm, 5 μm, 10 μm, 20 μm, 30
μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm etc., it is not limited to cited numerical value, the numberical range
Other interior unlisted numerical value are equally applicable, preferably 0.1-10 μm, further preferably 5 μm.
Preferably, the porous material with a thickness of 0.01-100mm, such as 0.01mm, 1mm, 5mm, 10mm, 20mm,
30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm etc., it is not limited to cited numerical value, the numerical value model
Other unlisted numerical value are equally applicable in enclosing, preferably 0.1-10mm, further preferably 0.5mm.
Preferably, the porosity of the porous material be 10%-99%, such as 10%, 20%, 30%, 40%, 50%,
60%, 70%, 80%, 90%, 95%, 99% etc., it is not limited to cited numerical value, interior other of the numberical range are not arranged
The numerical value of act is equally applicable, preferably 30-80%, and further preferred 60%.
As currently preferred technical solution, the ion conductor liquid includes that ionic liquid, sodium salt solution, sylvite are molten
In liquid, sulfate liquor, nitrate solution, chloride brine or phosphate solution any one or at least two group
It closes, it is typical but be non-limiting combination and have: the group of the combination of ionic liquid and sodium salt solution, potassium salt soln and sulfate liquor
It closes, the combination of nitrate solution and chloride brine, the combination of ionic liquid, sodium salt solution and potassium salt soln, sulfate is molten
The combination of liquid, nitrate solution and chloride brine, the group of ionic liquid, sodium salt solution, potassium salt soln and sulfate liquor
It closes, the combination of nitrate solution, chloride brine, ionic liquid and phosphate solution, ionic liquid, sodium salt solution, sylvite
Solution, sulfate liquor and combination of nitrate solution etc., preferably ionic liquid.
Preferably, the ion conductor liquid is ionic liquid.The ionic liquid includes but is not limited to 1- butyl -3- first
Base imidazoles trifluoroacetate, 1- base -3- methylimidazole villaumite, 1- amyl -3- methylimidazole bromide, tributyhnethylammonium chloride
In 1- ethyl-3-methylimidazole hexafluorophosphate any one or at least two combination.
The sodium salt solution, potassium salt soln, sulfate liquor, nitrate solution, chloride brine or phosphate solution
In solvent can be water.
As currently preferred technical solution, in the sensor dielectric layer, ion conductor liquid and porous material
Mass ratio is 1:(0.1-10), such as 1:0.1,1:0.5,1:1,1:2,1:3,1:4,1:5,1:6,1:7,1:8,1:9 or 1:10
Deng, it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable, preferably 1:(2-
5).In the present invention, if the ion conductor liquid in dielectric layer is excessive, porous material is very few, will lead to the mechanical property of film
Difference；If porous material is excessive and ion conductor liquid is very few, it is low to will lead to transparency, and sensing capabilities are poor.
Second aspect, the present invention provide a kind of preparation method of sensor dielectric layer as described in relation to the first aspect, the method
The following steps are included:
Ion conductor liquid is mixed with porous material, stands, obtains the sensor dielectric layer.
Provided by the invention preparation method is simple, and cost of material is low, facilitates large-scale industrial production.
As currently preferred technical solution, the method that ion conductor liquid is mixed with porous material includes taking out
Filter, titration, spraying, coating or impregnate in any one or at least two combination, wherein typical but non-limiting combination
Have: suction filtration and the combination titrated, the combination for spraying and coating, the combination for filtering, titrating and spraying, suction filtration, titration spray and painting
The combination covered, the combination etc. for filtering, titrate, spray, coating and impregnating, preferably impregnates.
After the above method of the invention on the porous material supported ion liquid, the surface of porous material still has one
Part raised structures can effectively improve the sensitive of sensor under the action of this raised structures and ion conductor are common
Degree.
As currently preferred technical solution, time of the standing is 1-120min, such as 1min, 5min,
10min, 20min, 30min, 40min, 50min, 60min, 70min, 80min, 90min, 100min, 110min, 120min etc.,
It is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable, preferably 10-60min,
Further preferably 30min.
As currently preferred technical solution, the preparation method further include:
The extra ion conductor liquid of porous material surface is removed after standing.
Preferably, the method for the extra ion conductor liquid of the removal porous material surface includes: to stand upside down stand, is dustless
Cloth wiping, glass bar rolling wipe, shake or rotate in any one or at least two combination, typical but non-limiting combination
Are as follows: suction filtration and the combination titrated, the combination for spraying and coating, the combination for filtering, titrating and spraying, suction filtration, titration spray and painting
The combination covered, the combination etc. for filtering, titrate, spray, coating and impregnating, preferably handstand standing.
As the further preferred technical solution of preparation method of the present invention, the described method comprises the following steps:
(1) ion conductor liquid is mixed with the method impregnated with porous material, stands 10-60min；
(2) the extra ion conductor liquid of porous material surface described in step (1) is removed with the method stood of standing upside down, obtained
To the sensor dielectric layer.
The third aspect, the present invention provide a kind of purposes of sensor dielectric layer as described in relation to the first aspect, and the sensor is situated between
Electric layer is used for flexible and transparent senser element.
Dielectric layer provided by the invention not only has good optical clarity and flexibility, but also can provide high biography
Perceptual energy, the dielectric layer have very big application space in terms of clear sensor part production.
Compared with prior art, the invention has the following advantages:
(1) in the present invention, dielectric layer is mainly made of opaque or translucent porous material and ion conductor liquid,
Since ion conductor liquid and porous material have similar refractive index, the ion conductor liquid loaded in porous material hole
Body can significantly improve the transparency of film, so that opaque or translucent porous film material be made to become high transparency dielectric material
Material, has achieved the purpose that opaque material being changed into transparent material；
(2) in the present invention, there are the intrapore ionic actives of porous material can make to sense under the effect of external force
Device forms electric double layer, so as to improve the sensing capabilities of sensor；
(3) up to 96.1%, detection limit can respond the transmissivity of sensor dielectric layer provided by the invention down to 0.2Pa
Time can be down to 32s, and maximum sensitivity is up to 2.825KPa-1, can be applied to the senser element etc. of production high transparency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of sensor dielectric layer that the embodiment of the present invention 1 provides, wherein 1- porous material, 2- from
Sub- conductor liquid；
Fig. 2 is the scanning electron microscope (SEM) photograph for the polyvinylidene fluoride porous film that the embodiment of the present invention 1 uses；
Fig. 3 is the scanning electron microscope (SEM) photograph for the polyvinylidene fluoride film that the load that the embodiment of the present invention 1 is prepared has ionic liquid；
Fig. 4 is the polyvinylidene fluoride porous film that uses of the embodiment of the present invention 1 and fill the transparent of dielectric layer after ionic liquid
Spend comparison diagram；
Fig. 5 is that the detection of the pressure sensor for the dielectric layer production that the embodiment of the present invention 1 provides limits test chart；
Fig. 6 is the response time test chart for the pressure sensor that the embodiment of the present invention 1 provides dielectric layer production, is embedded in figure
Two width illustrations be apply and removal pressure when data point enlarged drawing；
Fig. 7 is the sensitivity test figure for the pressure sensor that the embodiment of the present invention 1 provides dielectric layer production；
Fig. 8 is the sensitivity test figure for the pressure sensor that comparative example 1 provides dielectric layer production.
Specific embodiment
In order to better illustrate the present invention, it is easy to understand technical solution of the present invention, below further specifically to the present invention
It is bright.But following embodiments is only simple example of the invention, does not represent or limit the scope of the present invention, this
Invention protection scope is subject to claims.
The following are typical but non-limiting embodiments of the invention:
Embodiment 1
The present embodiment is prepared as follows sensor dielectric layer:
It (1) is 5 μm by aperture, porosity 50% is dipped into ionic liquid with a thickness of the polyvinylidene fluoride porous film of 0.5mm
In liquid solution (1- ethyl-3-methylimidazole hexafluorophosphate), 60min is stood；
(2) it is wiped by dust-free paper, the extra ion conductor liquid of removal film surface obtains transparent sensor dielectric
Layer.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are translucent polyvinylidene fluoride porous film, and the ion conductor liquid is ion
In liquid (1- ethyl-3-methylimidazole hexafluorophosphate) described sensor dielectric layer, ion conductor liquid and porous material
Mass ratio is 1:1.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Morphology analysis is carried out to sensor dielectric layer manufactured in the present embodiment using scanning electron microscope:
Fig. 1 is the structural schematic diagram of sensor dielectric layer manufactured in the present embodiment, as shown in the drawing, ion conductor liquid 2
It is filled in the hole of the porous material 1.
Fig. 2 is the scanning electron microscope (SEM) photograph for the polyvinylidene fluoride porous film that the present embodiment uses, it can be seen that loaded ionic liquid
Before body, Kynoar has porous structure, and rough surface is strong to the scattering power of light, therefore porous polyvinylidene fluoride
Alkene is opaque or translucent.
Fig. 3 is the scanning electron microscope (SEM) photograph for the polyvinylidene fluoride film that the load that the present embodiment is prepared has ionic liquid, by this
Figure reduces the coarse of film it is found that ionic liquid is filled in the hole of polyvinylidene fluoride porous film after impregnating ionic liquid
Degree, causes the transparency of film to greatly improve.Moreover, as pressure sensor, after supported ion liquid, the surface of film is still
Some raised structures can effectively improve sensor under the action of this raised structures and ion conductor are common
Sensitivity.
Fig. 4 is the transparency comparison of dielectric layer after the polyvinylidene fluoride porous film that the present embodiment uses and filling ionic liquid
Figure, it can be seen from this figure that the transmissivity of polyvinylidene fluoride porous film increases to from 20.8% after filling ionic liquid
94.8%, transparency is substantially increased.
Fig. 5 is that the detection of the pressure sensor of dielectric layer provided in this embodiment production limits test chart, can be through by the figure
The figure is extrapolated, and when pressure applied is small arrives 0.2Pa, can there is apparent detection peak.
Fig. 6 is the response time test chart of the pressure sensor made the present embodiment provides dielectric layer, by the figure and figure
The illustration of middle insertion can be seen that its response time and can achieve 40ms, the sensing capability that can be matched in excellence or beauty with human skin.
Fig. 7 is the sensitivity test figure of the pressure sensor made the present embodiment provides dielectric layer, it can be seen from this figure that
The peak response of sensor prepared by dielectric layer provided in this embodiment reaches 1.194KPa-1。
Embodiment 2
The present embodiment is prepared as follows sensor dielectric layer:
(1) sodium salt (sodium chloride) aqueous solution droplets are determined to aperture to be 100 μm, porosity 30%, with a thickness of the cloth of 1mm
In material, 30min is stood；
(2) it is stood by standing upside down, the extra sodium salt solution of removal design on fabric surface obtains transparent dielectric layer material.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are opaque cloth, and the ion conductor liquid is sodium-chloride water solution.It is described
In sensor dielectric layer, the mass ratio of ion conductor liquid and porous material is 1:2.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Embodiment 3
The present embodiment is prepared as follows sensor dielectric layer:
(1) sylvite (potassium chloride) aqueous solution liquid is coated to aperture is 50 μm, porosity 60%, with a thickness of the modeling of 10mm
In strand foam, 20min is stood；
(2) it is wiped by glass bar rolling, the extra potassium salt soln of removal design on fabric surface obtains transparent dielectric layer material.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are opaque plastic foam, and the ion conductor liquid is potassium chloride solution.
In the sensor dielectric layer, the mass ratio of ion conductor liquid and porous material is 1:0.2.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Embodiment 4
The present embodiment is prepared as follows sensor dielectric layer:
It (1) is 1 μm by aperture, porosity 70% is dipped into nitrate with a thickness of the polystyrene porous membrane of 0.1mm
In (sodium nitrate) aqueous solution, 30min is stood；
(2) by concussion, the nitrate solution of polystyrene porous membrane excess surface is removed, transparent dielectric layer material is obtained
Material.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are translucent polystyrene porous membrane, and the ion conductor liquid is sodium nitrate
Aqueous solution.In the sensor dielectric layer, the mass ratio of ion conductor liquid and porous material is 1:3.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Embodiment 5
The present embodiment is prepared as follows sensor dielectric layer:
It (1) is 10 μm by aperture, porosity 85% is dipped into sulfate (sulphur with a thickness of the porous polylactic acid film of 0.3mm
Sour sodium) in aqueous solution, stand 60min；
(2) by rotation, the sulfate liquor of porous polylactic acid film excess surface is removed, transparent dielectric layer material is obtained
Material.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are translucent porous polylactic acid film, and the ion conductor liquid is sodium sulphate water
Solution.In the sensor dielectric layer, the mass ratio of ion conductor liquid and porous material is 1:2.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Embodiment 6
The present embodiment is prepared as follows sensor dielectric layer:
(1) by ionic liquid (1- butyl -3- methylimidazole trifluoroacetate) filter to being 100 μm in aperture, porosity is
70%, with a thickness of in the polypropylene porous film of 3mm, stand 60min；
(2) it is wiped by non-dust cloth, the extra ionic gel of removal polypropylene porous membrane surface obtains transparent dielectric layer
Material.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are translucent polypropylene porous film, and the ion conductor liquid is ionic liquid
(1- butyl -3- methylimidazole trifluoroacetate).In the sensor dielectric layer, the quality of ion conductor liquid and porous material
Than for 1:5.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Embodiment 7
The present embodiment is prepared as follows sensor dielectric layer:
It (1) is 50 μm coated in aperture by phosphate (sodium phosphate) aqueous solution, porosity 30%, with a thickness of the poly- of 5mm
In vinyl chloride perforated membrane, 60min is stood；
(2) by concussion, the extra phosphate solution of removal polyvinyl chloride porous film surface obtains transparent dielectric layer material
Material.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are translucent polyvinyl chloride perforated membrane, and the ion conductor liquid is sodium phosphate
Aqueous solution.In the sensor dielectric layer, the mass ratio of ion conductor liquid and porous material is 1:10.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Embodiment 8
The present embodiment is prepared as follows sensor dielectric layer:
(1) filtering chloride salt (barium chloride) aqueous solution in aperture is 1 μm, porosity 40%, with a thickness of the poly- of 1mm
In vinyl chloride perforated membrane, 120min is stood；
(2) by rotation, the chloride brine of polyethylene porous membrane excess surface is removed, transparent dielectric layer material is obtained
Material.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are translucent polyethylene porous membrane, and the ion conductor liquid is barium chloride water
Solution.In the sensor dielectric layer, the mass ratio of ion conductor liquid and porous material is 1:3.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Embodiment 9
The present embodiment is prepared as follows sensor dielectric layer:
It (1) is 0.5 μm by aperture, porosity 80% is dipped into ion with a thickness of the cellulose acetate perforated membrane of 0.2mm
In liquid (1- amyl -3- methylimidazole bromide), 20min is stood；
(2) it is stood by standing upside down, the extra ionic liquid of removal cellulose acetate porous film surface obtains transparent dielectric
Layer material.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are translucent cellulose acetate perforated membrane, and the ion conductor liquid is ion
Liquid (1- amyl -3- methylimidazole bromide).In the sensor dielectric layer, the mass ratio of ion conductor liquid and porous material
For 1:2.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Embodiment 10
The present embodiment is prepared as follows sensor dielectric layer:
Difference with embodiment 1 is only that, in the present embodiment, it is porous that polyvinylidene fluoride porous film is replaced with cellulose
Film.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are translucent fibrination pore membrane, and the ion conductor liquid is ionic liquid
(1- ethyl-3-methylimidazole hexafluorophosphate).In the sensor dielectric layer, the quality of ion conductor liquid and porous material
Than for 1:8.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Embodiment 11
The present embodiment is prepared as follows sensor dielectric layer:
Difference with embodiment 1 is only that in the present embodiment, will have ionic liquid to replace with sodium salt (sodium chloride) water
Solution.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are translucent polyvinylidene fluoride porous film, and the ion conductor liquid is chlorination
Sodium water solution, in the sensor dielectric layer, the mass ratio of ion conductor liquid and porous material is 1:1.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Embodiment 12
The present embodiment is prepared as follows sensor dielectric layer:
It (1) is 0.1 μm by aperture, porosity 80% is dipped into ion with a thickness of the polyvinylidene fluoride porous film of 100mm
In liquid (1- ethyl-3-methylimidazole hexafluorophosphate), 10min is stood；
(2) it is wiped by dust-free paper, the extra ion conductor liquid of removal film surface obtains transparent sensor dielectric
Layer.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are translucent polyvinylidene fluoride porous film, and the ion conductor liquid is ion
Liquid (1- ethyl-3-methylimidazole hexafluorophosphate).In the sensor dielectric layer, ion conductor liquid and porous material
Mass ratio is 1:0.2.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Embodiment 13
(1) by aperture be 0.01 μm, porosity 10%, with a thickness of 0.01mm polyvinylidene fluoride porous film be dipped into from
In sub- liquid (1- ethyl-3-methylimidazole hexafluorophosphate), 1min is stood；
(2) it is wiped by dust-free paper, the extra ion conductor liquid of removal film surface obtains transparent sensor dielectric
Layer.
Sensor dielectric layer manufactured in the present embodiment by porous material and be filled in the porous material it is intrapore from
Sub- conductor liquid composition, the porous material are translucent polyvinylidene fluoride porous film, and the ion conductor liquid is ion
Liquid (1- ethyl-3-methylimidazole hexafluorophosphate).In the sensor dielectric layer, ion conductor liquid and porous material
Mass ratio is 1:10.
The performance test results of sensor dielectric layer manufactured in the present embodiment are shown in Table 1.
Comparative example 1
Difference with embodiment 1 is only that, in this comparative example, is not filled with ion conductor liquid.
The performance test results of the sensor dielectric layer of this comparative example preparation are shown in Table 1.
Fig. 8 provides the sensitivity test figure of the pressure sensor of dielectric layer production for this comparative example, it can be seen from this figure that
The device peak response of unsupported ion conductor liquid is 0.245KPa-1.It can be seen that load in conjunction with Fig. 7, Fig. 8 and Fig. 4
Ionic active can be such that the sensing capability of transparency and device is substantially increased.
Comparative example 2
Difference with embodiment 1 is only that, in this comparative example, ion conductor liquid is replaced with pure water.
The performance test results of the sensor dielectric layer of this comparative example preparation are shown in Table 1.
Comparative example 3
Difference with embodiment 1 is only that, in this comparative example, will have polyvinylidene fluoride porous film to replace with glass.
The performance test results of the sensor dielectric layer of this comparative example preparation are shown in Table 1.
Test method
(1) institute's embodiment and comparative example are tested using ultraviolet-uisible spectrophotometer, it is saturating chooses 550nm point
Penetrate transparency of the value of rate as institute's sample.
(2) sensitivity test: pressure needed for being applied by press machine to sample, using multifunctional tester to the electricity of sample
Capacitance variation is recorded, and test frequency is set as 1 × 105Hz, by the relationship of power and capacitance variation rate, calculates and is surveyed
The detection of sample limits, response time and sensitivity.
(3) flexible test: pinching the both ends of institute's sample with hand, applies two opposite power, sees whether sample can be turned round
Turn.
Test result is as follows shown in table.
Table 1
Based on the above embodiments with comparative example it is found that the sensor dielectric layer of preparation of the embodiment of the present invention has excellent light
The advantages of learning transparency, and the detection limit of the sensor of its production is low, responding fast and high sensitivity.By embodiment 1 and comparison
Prepared by the present invention load has the dielectric layer of ion conductor liquid not only can effectively improve device known to the comparison of example 1-2
Transparency, and sensing capabilities also significantly improve；By the comparison of embodiment 1 and comparative example 3 it is found that the present invention selects perforated membrane
The sensing capabilities of sensor can preferably be increased as substrate.
The Applicant declares that the present invention is explained by the above embodiments detailed features and method detailed of the invention,
But the invention is not limited to above-mentioned processing steps, that is, do not mean that the present invention must rely on the above process steps to be carried out.
It should be clear to those skilled in the art, any improvement in the present invention, replaces to the equivalent of raw material selected by the present invention
It changes and the addition of auxiliary element, the selection of concrete mode etc., all of which fall within the scope of protection and disclosure of the present invention.
Claims (10)
1. a kind of sensor dielectric layer, which is characterized in that the dielectric layer includes porous material and is filled in the porous material
Expect that intrapore ion conductor liquid, the porous material are opaque or trnaslucent materials.
2. sensor dielectric layer according to claim 1, which is characterized in that the porous material is flexible material；
Preferably, the porous material includes that cloth, paper, plastic foam, polyimide porous membrane, dimethyl silicone polymer are porous
Film, polyvinylidene fluoride porous film, polystyrene porous membrane, porous polylactic acid film, polypropylene porous film, polyvinyl chloride perforated membrane,
In polyethylene porous membrane, fibrination pore membrane, cellulose acetate perforated membrane or nitrocellulose perforated membrane any one or extremely
Few two kinds of combination, preferably polyvinylidene fluoride porous film；
Preferably, the aperture of the porous material is 0.01-100 μm, preferably 0.1-10 μm, further preferably 5 μm；
Preferably, the porous material with a thickness of 0.01-100mm, preferably 0.1-10mm, further preferably 0.5mm；
Preferably, the porosity of the porous material is 10%-99%, preferably 30-80%, further preferred 60%.
3. sensor dielectric layer according to claim 1 or claim 2, which is characterized in that the ion conductor liquid includes ionic liquid
It is any one in body, sodium salt solution, potassium salt soln, sulfate liquor, nitrate solution, chloride brine or phosphate solution
Kind or at least two combination；
Preferably, the ion conductor liquid is ionic liquid.
4. any one of -3 sensor dielectric layer according to claim 1, which is characterized in that in the sensor dielectric layer, from
The mass ratio of sub- conductor liquid and porous material is 1:(0.1-10), preferably 1:(2-5).
5. a kind of preparation method of the sensor dielectric layer as described in claim any one of 1-4, which is characterized in that the method packet
Include following steps:
Ion conductor liquid is mixed with porous material, stands, obtains the sensor dielectric layer.
6. the preparation method of sensor dielectric layer according to claim 5, which is characterized in that it is described by ion conductor liquid with
The method of porous material mixing includes the combination of any one or at least two in filtering, titration, spraying, coat or impregnate,
Preferably impregnate.
7. according to the preparation method of the sensor dielectric layer of claim 5 or 6, which is characterized in that the time of the standing is
1-120min, preferably 10-60min, further preferably 30min.
8. according to the preparation method of any one of the claim 5-7 sensor dielectric layer, which is characterized in that the preparation method
Further include:
The extra ion conductor liquid of porous material surface is removed after standing；
Preferably, the method for the extra ion conductor liquid of the removal porous material surface includes: stand upside down standing, non-dust cloth wiping
Wipe, glass bar rolling wipe, shake or rotate in any one or at least two combination, preferably stand upside down standing.
9. according to the preparation method of any one of the claim 5-8 sensor dielectric layer, which is characterized in that the preparation method
The following steps are included:
(1) ion conductor liquid is mixed with the method impregnated with porous material, stands 10-60min；
(2) the extra ion conductor liquid of porous material surface described in step (1) is removed with the method stood of standing upside down, obtains institute
State sensor dielectric layer.
10. a kind of purposes of the sensor dielectric layer as described in claim any one of 1-4, which is characterized in that the sensor is situated between
Electric layer is used for flexible and transparent senser element.
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| CN201910227098.7A CN109827682B (en) | 2019-03-25 | 2019-03-25 | Sensor dielectric layer and preparation method and application thereof |
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| WO2020191947A1 (en) * | 2019-03-25 | 2020-10-01 | Southern University Of Science And Technology. | Sensor dielectric layer and preparation method and use thereof |
| CN113188711A (en) * | 2021-04-29 | 2021-07-30 | 苏州凝智新材料发展有限公司 | Pressure sensor and preparation method and application thereof |
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| CN114705247B (en) * | 2022-04-02 | 2023-09-22 | 杭州师范大学 | Ion type capacitive pressure and temperature sensing fiber device capable of being manufactured in batch and preparation method thereof |
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| CN109827682B (en) | 2022-01-14 |
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