CN208350247U - A kind of flexibility stress sensor - Google Patents
A kind of flexibility stress sensor Download PDFInfo
- Publication number
- CN208350247U CN208350247U CN201820623755.0U CN201820623755U CN208350247U CN 208350247 U CN208350247 U CN 208350247U CN 201820623755 U CN201820623755 U CN 201820623755U CN 208350247 U CN208350247 U CN 208350247U
- Authority
- CN
- China
- Prior art keywords
- covering yarn
- graphene
- sensor
- nethike embrane
- conductive layer
- 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.)
- Expired - Fee Related
Links
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 40
- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims abstract description 40
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims abstract description 40
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 40
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 37
- 150000001875 compounds Chemical class 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000001953 sensory effect Effects 0.000 claims abstract description 20
- 238000004528 spin coating Methods 0.000 claims abstract description 7
- 230000001464 adherent effect Effects 0.000 claims abstract description 5
- 238000001548 drop coating Methods 0.000 claims abstract description 3
- 238000007711 solidification Methods 0.000 claims abstract description 3
- 230000008023 solidification Effects 0.000 claims abstract description 3
- 229920002334 Spandex Polymers 0.000 claims description 7
- 239000004759 spandex Substances 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 abstract description 8
- 239000006185 dispersion Substances 0.000 description 20
- 239000000758 substrate Substances 0.000 description 19
- 239000007788 liquid Substances 0.000 description 15
- 229920000139 polyethylene terephthalate Polymers 0.000 description 15
- 239000005020 polyethylene terephthalate Substances 0.000 description 15
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 10
- 230000008859 change Effects 0.000 description 9
- 230000004044 response Effects 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- -1 Dragon skin Polymers 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 229920002379 silicone rubber Polymers 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 239000003292 glue Substances 0.000 description 5
- 230000036571 hydration Effects 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 5
- 230000001376 precipitating effect Effects 0.000 description 5
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 241001522296 Erithacus rubecula Species 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 238000009736 wetting Methods 0.000 description 4
- 230000036541 health Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000000840 electrochemical analysis Methods 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000039 congener Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920005839 ecoflex® Polymers 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000013305 flexible fiber Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000027756 respiratory electron transport chain Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The utility model is a kind of flexibility stress sensor.The sensor includes two sensory packages；Each sensory package includes PDMS adherent base bottom and the compound nethike embrane conductive layer of covering yarn-graphene, and the basal layer is formed a film and obtained after solidification by the spin coating of PDMS prepolymer or drop coating；The compound nethike embrane conductive layer of the covering yarn-graphene is to be assembled in the covering yarn skeleton by graphene dispersing solution and obtain；Two sensory package fittings, wherein the side of the compound nethike embrane conductive layer of covering yarn-graphene is bonded, and is located at centre, and flexibility stress sensor forms " sandwich " structure；The compound nethike embrane conductive layer of covering yarn-graphene of each sensor module is all connected with a conducting wire.The sensitivity of sensor of the utility model significant increase reduces detection limit.
Description
Technical field
The utility model relates to flexibility stress sensor fields, and in particular to a kind of based on covering yarn-graphene nethike embrane
The preparation method of strain gauge.
Background technique
With the high speed development of artificial intelligence and popularizing for intelligent terminal, wearable electronic shows huge market
Prospect.Core of the flexibility stress sensor as artificial flexible electronic device in human clinical's diagnosis, health evaluating, is good for
It is latent that the fields such as health monitoring, virtual electronic, flexible touch screen, flexible electronic skin, or even industrial robot possess very big application
Power.
Currently, the main way of manufacture strain transducer is the variation that the deformation of sensor is changed into resistance value, that is, press
Resistor-type strain gauge.One of more common preparation method is to be embedded in or cover one layer of conduction on flexible substrates surface
Material obtains the strain transducer of multilayered structure.Conductive material can be metal film or electrical-conductive nanometer material passes through various techniques
Assembling obtains conductive film.Graphene is most thin and most hard nano material in the world at present, and resistivity is extremely low, electron transfer
Speed is exceedingly fast.Before unique two-dimensional structure and excellent electric conductivity make graphene show greatly to apply in stress sensing field
Scape.
Traditional base material be surfacing elastic film, as Polymethyl methacrylate (PDMS),
The conductive layer of Ecoflex, Dragon skin, rubber etc., surface insertion or covering is also planar structure.This planar structure
The generally existing sensitivity of sensor it is not high enough, it is difficult to the shortcomings that detecting miniature deformation, limit its development and application.Therefore,
There is an urgent need to a kind of high sensitivity, while the novel strain gauge of preparation process simplicity.
Utility model content
The purpose of this utility model is to provide a kind of novel high-performance flexibility stress biography for deficiency existing for current techniques
Sensor.The sensor uses compound nethike embrane to substitute traditional planar structure material as conductive layer, by by two-dimensional layer also
Former graphene (RGO) is coated on covering yarn surface, obtains conductive compound nethike embrane.The utility model significant increase sensor
Sensitivity reduces detection limit.
The technical solution of the utility model are as follows:
A kind of flexibility stress sensor, including two sensory packages；Each sensory package include PDMS adherent base bottom and
The compound nethike embrane conductive layer of covering yarn-graphene, the basal layer be by the spin coating of PDMS prepolymer or drop coating, form a film after solidification and
?；The compound nethike embrane conductive layer of the covering yarn-graphene is to be assembled in the covering yarn skeleton by graphene dispersing solution and obtain；
Two sensory package fittings, wherein the fitting of covering yarn-graphene compound nethike embrane conductive layer side is located at centre, and flexibility stress passes
Sensor forms " sandwich " structure；The compound nethike embrane conductive layer of covering yarn-graphene of each sensor module is all connected with one and leads
Line.
The covering yarn skeleton is the yarn that diameter is 10 μm -30 μm, and yarn is one of spandex or polyamide fibre or two
Kind.
The PDMS adherent base bottom with a thickness of 200 μm -500 μm.
The conducting wire is copper wire or copper foil, and the conducting wire is connect by conducting resinl with graphene conductive layer.
The conducting resinl uses conductive silver paste or conductive carbon paste.
The conducting wire connects electro-chemical test equipment, and electro-chemical test equipment includes electrochemical analyser and digital versatile
Table.
The PDMS prepolymer is the component A that the commercially available trade mark is 184 bi-component external member silicon rubber of DOW CORNING Sylgard
With component B, quality is than component A: component B=10-15:1.
The substantive distinguishing features of the utility model are as follows:
For the utility model by using the flexible covering yarn of class spring structure as flexible back bone, two-dimensional slice is wrapped up on surface
The graphene of structure obtains conductive layer of the compound nethike embrane of covering yarn-graphene as strain transducer, to substitute surfacing
Plane conductive layer.Since the special class spring reticular structure of obtained compound nethike embrane is extremely sensitive to extraneous faint stress, make
Performance of sensor in terms of sensitivity and detection all improves a lot.
The utility model has the following beneficial effects:
(1) using flexible covering yarn as skeleton, nanostructure graphene sheet layer as sensitive material, covering yarn surface is
The filament wound structure of class spring, extraneous microseism can cause fiber contacts area that significant change, deformation transmitting occurs
To the graphene on surface, so that two-dimensional layer graphene is in contact-is separated or Relative sliding, be conducive to the spy to minimal stress
It surveys.Compared with conventional planar structure sensor, detection resolution is significantly improved.It can be used for detecting compression, bending, vibration etc. no
Congener stress.Should the compressed detected of force snesor limit up to 1.38pa, compression-sensitive degree is up to 77.1kPa-1(as schemed
4), sensitivity improves at least 20 times compared with the strain gauge of planar structure.Bending Sensitivity is 1.25cm-1(such as Fig. 6).It can
The faint vibration (such as Fig. 7) that detected amplitude is 10 μm.
(2) contact area is effectively to detect the area of stress between being wrapped in the conductive layer on flexible fiber surface, and therefore, this is soft
The size of property strain gauge can be made that very small (length and width can accomplish to be less than 1cm, most thin reachable 500 μ of thickness
M), solve the problems, such as that existing sensor miniaturization is difficult.It is suitably applied miniaturization and integrated equipment, can detect the human body heart
The physiological signals such as jump, breathing, for making the wearable device of detection human health.
(3) preparation process is relatively easy, and preparation condition is easy to accomplish.Covering yarn-graphene conductive nethike embrane is by impregnating certainly
The methods of assembling can prepare completion, and easy to assembly；The flexibility stress sensor can carry out device under air, atmospheric pressure environment
Encapsulation, can effectively reduce cost, and be suitable for large scale preparation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the flexibility stress sensor of the utility model；
Fig. 2 is the microstructural image that graphene is wrapped in covering yarn skeleton surface；
Fig. 3 is the compression response curve figure of the flexibility stress sensor of the utility model；
Fig. 4 is the conductance change rate of the flexibility stress sensor of the utility model with the curve graph of pressure change；
Fig. 5 is the bending response curve graph of the flexibility stress sensor of the utility model；
Fig. 6 is the curve graph that the conductance change rate of the flexibility stress sensor of the utility model changes with radius of curvature；
Fig. 7 is the vibration responding curve graph of the flexibility stress sensor of the utility model；
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
The utility model relates to graphene dispersing solution be well known materials, be to pass through chemistry using graphene oxide as raw material
Reduction method is prepared, and graphene concentration is 0.01mg/mL-0.4mg/mL, and solvent is water.
As shown in Figure 1, a kind of flexibility stress sensor according to the present utility model, comprising: upper substrate, upper layer covering yarn-
The compound nethike embrane of graphene, the lower layer's covering yarn-compound nethike embrane of graphene, lower substrate, conducting wire.
The utility model provides the preparation method of the flexibility stress sensor, comprising the following steps:
Embodiment 1:
(1) it prepares RGO dispersion liquid: hydration being added in graphene oxide (GO) aqueous dispersions (0.01mg/mL, 100mL)
92 DEG C of reduction 1h of hydrazine (375 μ L), extra precipitating are filtered out with gauze, obtain RGO dispersion liquid (0.01mg/mL).
(2) the compound nethike embrane of covering yarn-RGO is prepared: by covering yarn (blended Fypro 85%, spandex 15%；Diameter 15
μm) be put into UV-ozone cleaning device using ultraviolet lighting and ozone treatment 2min, make its surface hydrophilic, then leaching completely again
Profit 5min in RGO dispersion liquid, then paves and is placed in culture dish, and the compound nethike embrane of covering yarn-RGO is made in 60 DEG C of drying 2h,
As shown in Fig. 2, the rectangle that the nethike embrane made is cut into 1cm × 3cm is spare.
(3) prepare PDMS film: taking the commercially available trade mark is the component A of 184 bi-component external member silicon rubber of DOW CORNING Sylgard
It is placed in culture dish with component B 10:1 ratio in mass ratio and stirs 20min, vacuum defoamation to surface bubble-free, 60 DEG C of precuring
16min.(the component A is host agent Polymethyl methacrylate prepolymer, and component B is the prepolymer with vinyl sidechain
And crosslinking agent-following embodiment is same).Above-mentioned solution is spun on polyethylene terephthalate (PET) substrate surface, will be revolved
The PDMS film coated, which is put into 60 DEG C of air dry ovens, solidifies 20min, by film from PET base sur-face peeling, obtains thickness
Upper substrate and lower substrate for 200 μm of PDMS films as sensor (PDMS film still has certain viscosity at this time).
(4) it assembles sensor: covering yarn-RGO composite web is adhered to PDMS film surface.It is 1cm, thickness width
The copper sheet of 0.02mm is fixed on the both ends (as shown in Figure 1) of the compound nethike embrane of covering yarn-RGO with conductive silver glue, and centre reserves
A sensory package is prepared as sensing response area in the distance of 1.5cm.Two sensory packages are assembled face-to-face, are extruded
Assembled device is put into 3h in 60 DEG C of air dry ovens by extra air out, makes PDMS film completion of cure to get to three
The flexibility stress sensor of Mingzhi's structure.
Embodiment 2:
(1) RGO dispersion liquid is prepared: in (the middle addition hydration of graphene oxide (GO) aqueous dispersions (0.05mg/mL, 100mL)
92 DEG C of reduction 1h of hydrazine (375 μ L), extra precipitating are filtered out with gauze, obtain RGO dispersion liquid (0.05mg/mL).
(2) the compound nethike embrane of covering yarn-RGO is prepared: by covering yarn (blended Fypro 85%, spandex 15%；Diameter 20
μm) hydrophilicity-imparting treatment is carried out in UV-ozone cleaning device, then complete wetting 10min in RGO dispersion liquid paves placement
In culture dish, 60 DEG C of drying 2h repeat above-mentioned immersion step 2 times, the compound nethike embrane of covering yarn-RGO, the nethike embrane that will be made are made
The rectangle for being cut into 1cm × 3cm is spare.
(3) prepare PDMS film: taking the commercially available trade mark is the component A of 184 bi-component external member silicon rubber of DOW CORNING Sylgard
It is placed in culture dish with component B 10:1 ratio in mass ratio and stirs 20min, vacuum defoamation to surface bubble-free, 60 DEG C of precuring
16min.Above-mentioned solution is spun on polyethylene terephthalate (PET) substrate surface, the good PDMS film of spin coating is put
Enter in 60 DEG C of air dry ovens and solidify 30min, by film from PET base sur-face peeling, obtains the PDMS film with a thickness of 300 μm
As the upper substrate of sensor and lower substrate (PDMS film still has certain viscosity at this time).
(4) it assembles sensor: covering yarn-RGO composite web is adhered to PDMS film surface.It is 1cm, thickness width
The copper sheet of 0.02mm is fixed on the both ends (as shown in Figure 1) of the compound nethike embrane of covering yarn-RGO with conductive silver glue, and centre reserves
A sensory package is prepared as sensing response area in the distance of 1.5cm.Two sensory packages are assembled face-to-face, are extruded
Assembled device is put into 3h in 60 DEG C of air dry ovens by extra air out, makes PDMS film completion of cure to get to three
The flexibility stress sensor of Mingzhi's structure.
Embodiment 3:
(1) RGO dispersion liquid is prepared: in (the middle addition hydration of graphene oxide (GO) aqueous dispersions (0.1mg/mL, 100mL)
92 DEG C of reduction 1h of hydrazine (375 μ L), extra precipitating are filtered out with gauze, obtain RGO dispersion liquid (0.1mg/mL).
(2) the compound nethike embrane of covering yarn-RGO is prepared: by covering yarn (blended Fypro 85%, spandex 15%；Diameter 20
μm) hydrophilicity-imparting treatment is carried out in UV-ozone cleaning device, then complete wetting 15min in RGO dispersion liquid paves placement
In culture dish, 60 DEG C of drying 2h repeat above-mentioned immersion step 4 times, the compound nethike embrane of covering yarn-RGO, the nethike embrane that will be made are made
The rectangle for being cut into 1cm × 3cm is spare.
(3) prepare PDMS film: taking the commercially available trade mark is the component A of 184 bi-component external member silicon rubber of DOW CORNING Sylgard
It is placed in culture dish with component B 10:1 ratio in mass ratio and stirs 20min, vacuum defoamation to surface bubble-free, 60 DEG C of precuring
16min.Above-mentioned solution is spun on polyethylene terephthalate (PET) substrate surface, the good PDMS film of spin coating is put
Enter in 60 DEG C of air dry ovens and solidify 35min, by film from PET base sur-face peeling, obtains the PDMS film with a thickness of 400 μm
As the upper substrate of sensor and lower substrate (PDMS film still has certain viscosity at this time).
(4) it assembles sensor: covering yarn-RGO composite web is adhered to PDMS film surface.It is 1cm, thickness width
The copper sheet of 0.02mm is fixed on the both ends (as shown in Figure 1) of the compound nethike embrane of covering yarn-RGO with conductive silver glue, and centre reserves
A sensory package is prepared as sensing response area in the distance of 1.5cm.Two sensory packages are assembled face-to-face, are extruded
Assembled device is put into 3h in 60 DEG C of air dry ovens by extra air out, makes PDMS film completion of cure to get to three
The flexibility stress sensor of Mingzhi's structure.
Embodiment 4:
(1) RGO dispersion liquid is prepared: in (the middle addition hydration of graphene oxide (GO) aqueous dispersions (0.2mg/mL, 100mL)
92 DEG C of reduction 1h of hydrazine (375 μ L), extra precipitating are filtered out with gauze, obtain RGO dispersion liquid (0.2mg/mL).
(2) the compound nethike embrane of covering yarn-RGO is prepared: by covering yarn (blended Fypro 85%, spandex 15%；Diameter 30
μm) hydrophilicity-imparting treatment is carried out in UV-ozone cleaning device, then complete wetting 20min in RGO dispersion liquid paves placement
In culture dish, 60 DEG C of drying 2h repeat above-mentioned immersion step 6 times, the compound nethike embrane of covering yarn-RGO, the nethike embrane that will be made are made
The rectangle for being cut into 1cm × 3cm is spare.
(3) prepare PDMS film: taking the commercially available trade mark is the component A of 184 bi-component external member silicon rubber of DOW CORNING Sylgard
It is placed in culture dish with component B 10:1 ratio in mass ratio and stirs 20min, vacuum defoamation to surface bubble-free, 60 DEG C of precuring
16min.Above-mentioned solution is spun on polyethylene terephthalate (PET) substrate surface, the good PDMS film of spin coating is put
Enter in 60 DEG C of air dry ovens and solidify 35min, by film from PET base sur-face peeling, obtains the PDMS film with a thickness of 400 μm
As the upper substrate of sensor and lower substrate (PDMS film still has certain viscosity at this time).
(4) it assembles sensor: covering yarn-RGO composite web is adhered to PDMS film surface.It is 1cm, thickness width
The copper sheet of 0.02mm is fixed on the both ends (as shown in Figure 1) of the compound nethike embrane of covering yarn-RGO with conductive silver glue, and centre reserves
A sensory package is prepared as sensing response area in the distance of 1.5cm.Two sensory packages are assembled face-to-face, are extruded
Assembled device is put into 3h in 60 DEG C of air dry ovens by extra air out, makes PDMS film completion of cure to get to three
The flexibility stress sensor of Mingzhi's structure.
Embodiment 5:
(1) RGO dispersion liquid is prepared: in (the middle addition hydration of graphene oxide (GO) aqueous dispersions (0.4mg/mL, 100mL)
92 DEG C of reduction 1h of hydrazine (375 μ L), extra precipitating are filtered out with gauze, obtain RGO dispersion liquid (0.4mg/mL).
(2) the compound nethike embrane of covering yarn-RGO is prepared: by covering yarn (blended Fypro 85%, spandex 15%；Diameter 30
μm) hydrophilicity-imparting treatment is carried out in UV-ozone cleaning device, then complete wetting 30min in RGO dispersion liquid paves placement
In culture dish, 60 DEG C of drying 2h repeat above-mentioned immersion step 8 times, the compound nethike embrane of covering yarn-RGO, the nethike embrane that will be made are made
The rectangle for being cut into 1cm × 3cm is spare.
(3) prepare PDMS film: taking the commercially available trade mark is the component A of 184 bi-component external member silicon rubber of DOW CORNING Sylgard
It is placed in culture dish with component B 10:1 ratio in mass ratio and stirs 20min, vacuum defoamation to surface bubble-free, 60 DEG C of precuring
16min.Above-mentioned solution is spun on polyethylene terephthalate (PET) substrate surface, the good PDMS film of spin coating is put
Enter in 60 DEG C of air dry ovens and solidify 45min, by film from PET base sur-face peeling, obtains the PDMS film with a thickness of 500 μm
As the upper substrate of sensor and lower substrate (PDMS film still has certain viscosity at this time).
(4) it assembles sensor: covering yarn-RGO composite web is adhered to PDMS film surface.It is 1cm, thickness width
The copper sheet of 0.02mm is fixed on the both ends (as shown in Figure 1) of the compound nethike embrane of covering yarn-RGO with conductive silver glue, and centre reserves
A sensory package is prepared as sensing response area in the distance of 1.5cm.Two sensory packages are assembled face-to-face, are extruded
Assembled device is put into 3h in 60 DEG C of air dry ovens by extra air out, makes PDMS film completion of cure to get to three
The flexibility stress sensor of Mingzhi's structure.
Fig. 3 is round robin curve of the sensor in example 1 to compressive deformation.In 1kPa pressure, sensor sheet reveals
Good round robin performance.Fig. 4 is curve of the sensor conductance change rate in example 1 with pressure change, and slope can react
The compression-sensitive degree of sensor.Pressure < 0.3kPa, high sensitivity reach 77.1kPa-1.Meanwhile sensor has very wide detection model
It encloses, the minimum slight pressure that can be used for detecting 1.38pa, highest can detect the pressure of 80kPa.Fig. 5 is the sensor in example 1
To the response curve of Bending Deformation.It is 1.5cm in radius of curvature, sensor sheet reveals stable and sensitive round robin
Energy.Fig. 6 is the curve that the sensor conductance change rate in example 1 changes with radius of curvature, Bending Sensitivity 1.25cm-1.Fig. 7
The round robin curve that faint dextrorotation is shaken for the sensor in example 1.Amplitude is 10 μm, frequency 1HZ, sensor performance
Apparent response signal out.The above electrochemical data is tested by Shanghai Chen Hua electrochemical workstation CHI-760E, using permanent electricity
Bit pattern, voltage 1V.Various deformation are provided by Dynamic Mechanical Analyzer DMA (Q800, TAInstruments).
Should force snesor traditional planar structure material is substituted by using compound nethike embrane as conductive layer, greatly mention
The sensitivity for having risen sensor reduces detection limit, the efficient detection suitable for a variety of deformation.
The working principle of the flexibility stress sensor of the utility model are as follows: the flexibility stress sensor original state, on
Lower two parts sensory package part contact, forms conducting structure.Under extraneous stress, deformation occurs and conducts to packet for substrate
Heart yarn skeleton and the conductive layer on skeleton surface, the deformation of skeleton make the contact area of surface conductive layer change, cause graphite
It is in contact-separates between alkene lamella and Relative sliding, change so as to cause sensor conductance rate.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
The utility model unaccomplished matter is well-known technique.
Claims (1)
1. a kind of flexibility stress sensor, it is characterized in that the sensor includes two sensory packages；Each sensory package includes
PDMS adherent base bottom and the compound nethike embrane conductive layer of covering yarn-graphene, the basal layer be by the spin coating of PDMS prepolymer or
Drop coating forms a film and obtains after solidification；The compound nethike embrane conductive layer of the covering yarn-graphene is that institute is assembled in by graphene dispersing solution
It states covering yarn skeleton and obtains；Two sensory package fittings, wherein the side of the compound nethike embrane conductive layer of covering yarn-graphene is bonded,
Positioned at centre, flexibility stress sensor forms " sandwich " structure；The compound nethike embrane of covering yarn-graphene of each sensor module
Conductive layer is all connected with a conducting wire；
The covering yarn skeleton is the yarn that diameter is 10 μm -30 μm, and yarn is one or both of spandex or polyamide fibre；
The PDMS adherent base bottom with a thickness of 200 μm -500 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820623755.0U CN208350247U (en) | 2018-04-28 | 2018-04-28 | A kind of flexibility stress sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820623755.0U CN208350247U (en) | 2018-04-28 | 2018-04-28 | A kind of flexibility stress sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208350247U true CN208350247U (en) | 2019-01-08 |
Family
ID=64887809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820623755.0U Expired - Fee Related CN208350247U (en) | 2018-04-28 | 2018-04-28 | A kind of flexibility stress sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208350247U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332887A (en) * | 2018-04-28 | 2018-07-27 | 河北工业大学 | A kind of flexibility stress sensor |
| CN113504267A (en) * | 2021-04-12 | 2021-10-15 | 浙江大学 | Piezoresistive sensor based on conductive hydrogel double-tower-shaped spring structure, preparation method and application |
-
2018
- 2018-04-28 CN CN201820623755.0U patent/CN208350247U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332887A (en) * | 2018-04-28 | 2018-07-27 | 河北工业大学 | A kind of flexibility stress sensor |
| CN108332887B (en) * | 2018-04-28 | 2024-08-23 | 河北工业大学 | Flexible stress sensor |
| CN113504267A (en) * | 2021-04-12 | 2021-10-15 | 浙江大学 | Piezoresistive sensor based on conductive hydrogel double-tower-shaped spring structure, preparation method and application |
| CN113504267B (en) * | 2021-04-12 | 2022-04-08 | 浙江大学 | Piezoresistive sensor based on conductive hydrogel double-tower-shaped spring structure, preparation method and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108332887A (en) | A kind of flexibility stress sensor | |
| Jin et al. | Ultrathin nanofibrous membranes containing insulating microbeads for highly sensitive flexible pressure sensors | |
| Wang et al. | A durable nanomesh on-skin strain gauge for natural skin motion monitoring with minimum mechanical constraints | |
| Zhou et al. | Significant stretchability enhancement of a crack-based strain sensor combined with high sensitivity and superior durability for motion monitoring | |
| Oh et al. | Pressure insensitive strain sensor with facile solution-based process for tactile sensing applications | |
| Yang et al. | In situ polymerized MXene/polypyrrole/hydroxyethyl cellulose-based flexible strain sensor enabled by machine learning for handwriting recognition | |
| Song et al. | Breathable and skin-mountable strain sensor with tunable stretchability, sensitivity, and linearity via surface strain delocalization for versatile skin activities’ recognition | |
| CN109576905B (en) | MXene-based flexible polyurethane fiber membrane strain sensor | |
| Ren et al. | Flexible sensors based on organic–inorganic hybrid materials | |
| Lin et al. | All-nanofibrous ionic capacitive pressure sensor for wearable applications | |
| Guo et al. | Bioinspired sandwich-structured pressure sensors based on graphene oxide/hydroxyl functionalized carbon nanotubes/bovine serum albumin nanocomposites for wearable textile electronics | |
| Zhou et al. | All-nanofiber network structure for ultrasensitive piezoresistive pressure sensors | |
| Zhao et al. | Washable patches with gold nanowires/textiles in wearable sensors for health monitoring | |
| Li et al. | Visually aided tactile enhancement system based on ultrathin highly sensitive crack-based strain sensors | |
| CN105708425A (en) | Development of flexible resistance type pressure sensor for human body pulse detection | |
| CN113218296B (en) | Elastic strain sensor and preparation method thereof | |
| Wen et al. | Wearable multimode sensor with a seamless integrated structure for recognition of different joint motion states with the assistance of a deep learning algorithm | |
| CN110411623B (en) | High-sensitivity flexible piezoresistive sensor and preparation method and application thereof | |
| CN208350247U (en) | A kind of flexibility stress sensor | |
| CN109855782A (en) | Sensor compliant conductive composite membrane and preparation method thereof and flexible sensor | |
| CN112525065A (en) | Micro-crack flexible resistance change mechanical sensor based on mixed resistance entanglement network and preparation method thereof | |
| Yao et al. | Poly (vinyl alcohol)/phosphoric acid gel electrolyte@ polydimethylsiloxane sponge for piezoresistive pressure sensors | |
| Meng et al. | Degradable and highly sensitive CB-based pressure sensor with applications for speech recognition and human motion monitoring | |
| CN112146796A (en) | Flexible stress sensor and preparation method thereof | |
| Yu et al. | Multilayer Perceptron Algorithm-Assisted Flexible Piezoresistive PDMS/Chitosan/cMWCNT Sponge Pressure Sensor for Sedentary Healthcare Monitoring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190108 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |