CN110330747A - A kind of preparation method and application of big strain super-elasticity PVA/MCNTS hydrogel - Google Patents
A kind of preparation method and application of big strain super-elasticity PVA/MCNTS hydrogel Download PDFInfo
- Publication number
- CN110330747A CN110330747A CN201910477009.4A CN201910477009A CN110330747A CN 110330747 A CN110330747 A CN 110330747A CN 201910477009 A CN201910477009 A CN 201910477009A CN 110330747 A CN110330747 A CN 110330747A
- Authority
- CN
- China
- Prior art keywords
- mcnts
- pva
- powder
- hydrogel
- preparation
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
- C08J3/075—Macromolecular gels
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/041—Carbon nanotubes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention proposes a kind of preparation method and application of big strain super-elasticity PVA/MCNTS hydrogel, preparation method is included 01, is prepared unordered MCNTS powder using chemical vapor deposition；02, by the acidification of MCNTS powder, separation, dry and grinding；03, PVA aqueous solution is prepared, step 02 treated MCNTS powder is added in PVA aqueous solution, heating water bath stirring keeps its fully dispersed, prepares PVA/MCNTS mixed solution；04, the PVA/MCNTS mixed solution in step 03 is poured into mold, then multiple freeze-thaw, obtains PVA/MCNTS hydrogel.Polyvinyl alcohol prepared by the present invention/multi-walled carbon nanotube hydrogel answers composition uniform, it is provided simultaneously with big elongation strain and compression strain, and have super-elasticity and severity factor in drawing process and compression process, due to its excellent performance, which can be used as the stretchable devices field of strain transducer application flexibility.
Description
Technical field
The present invention relates to technical field of nanometer material preparation, particularly relate to a kind of big strain super-elasticity PVA/MCNTS water-setting
The preparation method and application of glue can be used as strain transducer applied to flexible wearable field of electronic devices.
Background technique
With the development of science and technology and artificial intelligence, the demand of flexible wearable electronic device is increasing.Currently, big
Most flexible wearable devices are using organic polymer flexible substrates and conducting medium filler.Carbon nanotube is a kind of allusion quotation
The one-dimensional tubular nanometer material of type has good electric conductivity, thermal conductivity and good mechanical performance, is widely used in and answers
Become sensor.Polyvinyl alcohol is as a kind of with good biocompatibility organic polymer, with the earth elongation strain and tough
Property, but irrecoverable in drawing process limits its ability as the substrate of strain transducer.It is prepared using refrigerating cycle
Polyvinyl alcohol hydrogel have a large amount of three dimensional physical cross-linked network, so that it is had good bullet while having big strain
Property, but the electric conductivity of polyvinyl alcohol hydrogel is poor.
Summary of the invention
The present invention proposes a kind of preparation method and application of big strain super-elasticity PVA/MCNTS hydrogel, and PVA is polyethylene
Alcohol, MCNTS are multi-walled carbon nanotube, by multi-wall carbon nano-tube pipe powder compound in polyvinyl alcohol hydrogel, are substantially increased
The conductive capability of conventional hydrogels.
The technical scheme of the present invention is realized as follows: a kind of preparation side of big strain super-elasticity PVA/MCNTS hydrogel
Method, comprising the following steps:
01, unordered MCNTS powder is prepared using chemical vapor deposition；
02, by MCNTS powder soaking in 20% dust technology 12h, after acidification MCNTS powder by filter machine washing
It washs to neutrality and is separated by solid-liquid separation again, by the MCNTS isolated 60 DEG C of dry 12h in a vacuum drying oven, after drying
MCNTS powder is ground into more tiny particle with mortar；
03, PVA powder is added to the water, preparation PVA aqueous solution is stirred by heating water bath, treated by step 02
MCNTS powder is added in PVA aqueous solution, and heating water bath stirring keeps its fully dispersed, prepares PVA/MCNTS mixed solution；
04, the PVA/MCNTS mixed solution in step 03 is poured into mold, then multiple freeze-thaw, obtains PVA/
MCNTS hydrogel.
Further, in step 01, using CVD tube furnace, using 100ml dichloro-benzenes as carbon source, 0.6g ferrocene is to urge
Agent, in the atmosphere of the hydrogen-argon-mixed body of 2000sccm, reaction temperature is 850 DEG C, is grown on quartzy tube wall unordered
MCNTS powder.The multi-walled carbon nanotube of this method preparation has good electric conductivity and randomness, for the subsequent uniform ingredient of synthesis
Hydrogel provide may.
Further, in step 03, the PVA powder of 10g is added in the water of 90ml, is added by 85 DEG C of water-baths of water-bath
Thermal agitation 3h prepares the PVA aqueous solution of 10wt.%, step 02 treated MCNTS powder is added in PVA aqueous solution, 65
DEG C heating water bath stirring 3h keeps its fully dispersed, prepares PVA/MCNTS mixed solution.
Further, in step 04, the PVA/MCNTS mixed solution in step 03 is poured into cylindrical mold, so
12h is freezed in refrigerator afterwards, then the 12h that thaws at room temperature, freeze/thaw process is repeated as many times, and preparation PVA/MCNTS mixing is molten
Liquid.
Application of the above-mentioned big strain super-elasticity PVA/MCNTS hydrogel as elongation strain sensor or pressure sensor.
Further, the elongation strain sensor or pressure sensor are used for flexible wearable electronic device.
Beneficial effects of the present invention: the present invention is compound by multi-wall carbon nano-tube pipe powder and polyvinyl alcohol hydrogel, improves former
The electric conductivity of beginning polyvinyl alcohol hydrogel, preparation strain greatly hyperelastic polyvinyl alcohol/multi-walled carbon nanotube hydrogel.Mixed
When closing multi-wall carbon nano-tube pipe powder and polyvinyl alcohol water solution, heating water bath stirring can well solve carbon pipe and be unevenly distributed
The problem of.
During the preparation process, original multi-walled carbon nanotube has hydrophobicity to the present invention, and multi-walled carbon nanotube is acidified
Rear surface generates hydrophilic radical, and multi-walled carbon nanotube is made to have hydrophilic ability；Heating water bath polyvinyl alcohol and multi-walled carbon nanotube
Mixed solution, polyvinyl alcohol water solution is sticky liquid under room temperature, be unfavorable for the diffusion motion of multi-wall carbon nano-tube pipe powder,
The mixed solution of heating water bath polyvinyl alcohol and multi-walled carbon nanotube promotes multi-walled carbon nanotube diffusivity in the solution, is
The key of the uniform hydrogel of prepared composition.The method of refrigerating cycle can be polyvinyl alcohol and be physical crosslinking, and be prepared into
Dividing the uniform stretchable compressible super-elasticity hydrogel of three-dimensional, unordered multi-walled carbon nanotube is uniformly distributed in hydrogel,
Conductive media ability is provided for hydrogel, and has super-elasticity and the highly sensitive factor in drawing process and compression process.
The present invention has successfully obtained polyvinyl alcohol/multi-walled carbon nanotube of uniform component by acidification, grinding and water-bath
Hydrogel, the hydrogel can be stretched and be compressed, and be provided with big strain, super-elasticity and height in drawing process and compression process
Severity factor has very big application prospect in flexible wearable device especially strain transducer.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Preparation process schematic diagram Fig. 1 of the invention；
The electron scanning micrograph of Fig. 2 PVA/MCNTS hydrogel prepared by the present invention；
The stress-strain curve diagram that Fig. 3 PVA/MCNTS hydrogel prepared by the present invention is broken；
Fig. 4 PVA/MCNTS hydrogel prepared by the present invention stretch the stress-strain curve diagram of circulation；
Fig. 5 PVA/MCNTS hydrogel prepared by the present invention carries out the stress-strain curve diagram of compression circulation；
Fig. 6 polyvinyl alcohol prepared by the present invention/multi-walled carbon nanotube hydrogel carries out the curve graph of power electrical testing.
Wherein: MCNTS powder 1, beaker 2, PVA aqueous solution 3, water-bath 4, dropper 5, mold 6, the PVA/ after refrigerating cycle
MCNTS hydrogel 7.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of preparation method of big strain super-elasticity PVA/MCNTS hydrogel, comprising the following steps:
01, using CVD tube furnace, using 100ml dichloro-benzenes as carbon source, 0.6g ferrocene is catalyst, in 2000sccm hydrogen
In the atmosphere of argon mixture gas, reaction temperature is 850 DEG C, and unordered MCNTS powder is grown on quartzy tube wall；
02, by MCNTS powder soaking in 20% dust technology 12h, after acidification MCNTS powder by filter machine washing wash to
Neutrality is separated by solid-liquid separation again, by the MCNTS isolated 60 DEG C of dry 12h in a vacuum drying oven, by the MCNTS powder after drying
End is ground into more tiny particle with mortar；
03, the PVA powder of 10g is added in the water of 90ml, stirs 3h preparation by 85 DEG C of heating water baths of water-bath
The PVA aqueous solution of 10wt.% step 02 treated MCNTS powder is added in PVA aqueous solution, in 65 DEG C of heating water bath 3h
Keep its fully dispersed, prepares PVA/MCNTS mixed solution；
04, the PVA/MCNTS mixed solution in step 03 is poured into cylindrical mold, 12h is then freezed in refrigerator,
Thaw 12h at room temperature again, and freeze/thaw process is repeated as many times, and prepares PVA/MCNTS hydrogel, PVA/MCNTS hydrogel
Electron scanning micrograph is as shown in Figure 2.
In step 03, the MCNTS powder of addition is between 0.2g-1.0g, for example 0.2g, 0.6g or 1.0g, polyethylene
The volume of alcohol solution is 30ml.
The present invention will be described in detail with reference to embodiments.
Embodiment 1
10gPVA powder is added in 90ml water, 3h is stirred in 85 DEG C of heating water baths, it is water-soluble to obtain PVA.Pass through chemical gas
0.2gMCNTS powder is added described in 30ml after the acidification of MCNTS powder, dry, grinding for mutually deposition preparation MCNTS powder
In PVA solution, 3h is stirred in 65 DEG C of heating water baths, PVA/MCNTS mixed solution will be obtained and pour into mold, freezed in refrigerator
12h, then the 12h that thaws at room temperature, freeze-thaw process are repeated as many times, and obtain PVA/MCNTS hydrogel.
Embodiment 2
10gPVA powder is added in 90ml water, 3h is stirred in 85 DEG C of heating water baths, it is water-soluble to obtain PVA.Pass through chemical gas
0.6gMCNTS powder is added described in 30ml after the acidification of MCNTS powder, dry, grinding for mutually deposition preparation MCNTS powder
In PVA solution, 3h is stirred in 65 DEG C of heating water baths, PVA/MCNTS mixed solution will be obtained and pour into mold, freezed in refrigerator
12h, then the 12h that thaws at room temperature, freeze-thaw process are repeated as many times, and obtain PVA/MCNTS hydrogel.
Embodiment 3
10gPVA powder is added in 90ml water, 3h is stirred in 85 DEG C of heating water baths, it is water-soluble to obtain PVA.Pass through chemical gas
After the acidification of MCNTS powder, dry, grinding the above-mentioned PVA of 30ml is added in 1.0gMCNTS powder by mutually deposition preparation MCNTS powder
In solution, 3h is stirred in 65 DEG C of heating water baths, PVA/MCNTS mixed solution will be obtained and pour into mold, 12h is freezed in refrigerator,
Thaw 12h at room temperature again, and freeze-thaw process is repeated as many times, and obtains PVA/MCNTS hydrogel.
Comparative example 1
10gPVA powder is added in 90ml water, 3h is stirred in 85 DEG C of heating water baths, obtained PVA aqueous solution is poured into mould
Tool, freezes 12h, then the 12h that thaws at room temperature, freeze-thaw process is repeated as many times, and obtains PVA hydrogel in refrigerator.
Embodiment 1-3 and comparative example 1 are removed from the molds, are fixed on the fixture of stretching-machine, is drawn respectively
Stretch test, tensile speed 10mm/min.Enabling hydrogel original length is l0, length is l before being broken, according to ε=(l-l0)/l0*
100% calculates its strain value.Enabling hydrogel cross-sectional area is s, and load is F before being broken, and calculates its stress value according to σ=F/s, answers
Stress-strain curve as shown in figure 3, it can be seen that but when MCNTS be added 1.0g when, the strain of hydrogel is less than 300%.
Conductivity test is carried out to embodiment 1-3, tests its resistance value R respectively using multimeter, between multimeter beam probe
Be exemplified as l, hydrogel cross-sectional area is s, calculates its conductivity according to σ=l/Rs.Conductivity test is carried out to embodiment 1-3
As a result as shown in the table:
| Sample | Conductivity (S/km) |
| Embodiment 1 | 15.14530 |
| Embodiment 2 | 15.57002 |
| Embodiment 3 | 18.65908 |
Embodiment 2 is carried out to carry out cyclic tension experiment, with elongation strain for 50%, 100%, 200%, 300% circulation
5 circulations are stretched, tensile speed is 2 per minute circulations, and the stress-strain diagram for stretching circulation is as shown in Figure 4.
Circulation compression verification is carried out to embodiment 2, with compression strain 10%, 20%, 30%, 40%, 50% circulation compression 5
A circulation, compression speed are 2 per minute circulations, and the stress-strain diagram for compressing circulation is as shown in Figure 5.
Power electrical testing is carried out to embodiment 2, to strain 300% cyclic tension greatly, tensile speed is two per minute circulations,
And the variation of the resistance change rate in drawing process is tested, the curve of power electrical testing is as shown in Figure 6.
By above-mentioned test it is found that the PVA/MCNTS hydrogel of preparation has big elongation strain and bending strain, super-elasticity
The advantages that, the addition of disordered multi-wall nano carbon tube improves the conductive capability of hydrogel, and hydrogel is made to stretch and compress
There is high severity factor in the process, be conducive to PVA/MCNTS hydrogel as elongation strain sensor or pressure sensor application
In flexible wearable electronic device.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of preparation method of big strain super-elasticity PVA/MCNTS hydrogel, which comprises the following steps:
01, unordered MCNTS powder is prepared using chemical vapor deposition；
02, by MCNTS powder soaking in 20% dust technology 12h, after acidification MCNTS powder by filter machine washing wash to
Neutrality is separated by solid-liquid separation again, by the MCNTS isolated 60 DEG C of dry 12h in a vacuum drying oven, by the MCNTS powder after drying
It uses and is ground into more tiny particle in end；
03, PVA powder is added to the water, preparation PVA aqueous solution is stirred by heating water bath, by step 02 treated MCNTS
Powder is added in PVA aqueous solution, and heating water bath stirring keeps its fully dispersed, prepares PVA/MCNTS mixed solution；
04, the PVA/MCNTS mixed solution in step 03 is poured into mold, then multiple freeze-thaw, obtains PVA/MCNTS
Hydrogel.
2. a kind of preparation method of big strain super-elasticity PVA/MCNTS hydrogel according to claim 1, feature exist
In in step 01, using CVD tube furnace, using 100ml dichloro-benzenes as carbon source, 0.6g ferrocene is catalyst, in 2000sccm
In the atmosphere of hydrogen-argon-mixed body, reaction temperature is 850 DEG C, and unordered MCNTS powder is grown on quartzy tube wall.
3. a kind of preparation method of big strain super-elasticity PVA/MCNTS hydrogel according to claim 1, feature exist
In the PVA powder of 10g being added in the water of 90ml, passes through 85 DEG C of heating water baths of water-bath and stirs 3h preparation in step 03
Step 02 treated MCNTS powder is added in PVA aqueous solution, stirs in 65 DEG C of heating water baths by the PVA aqueous solution of 10wt.%
Mixing 3h keeps its fully dispersed, prepares PVA/MCNTS mixed solution.
4. a kind of preparation method of big strain super-elasticity PVA/MCNTS hydrogel according to claim 1, feature exist
In the PVA/MCNTS mixed solution in step 03 being poured into cylindrical mold, is then freezed in refrigerator in step 04
12h, then the 12h that thaws at room temperature, freeze/thaw process are repeated as many times, and prepare PVA/MCNTS mixed solution.
5. a kind of big strain super-elasticity PVA/MCNTS hydrogel as described in one of claim 1-4 is sensed as elongation strain
The application of device or pressure sensor.
6. a kind of elongation strain sensor as claimed in claim 5 or pressure sensor are used for flexible wearable electronic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477009.4A CN110330747B (en) | 2019-06-03 | 2019-06-03 | Preparation method and application of large-strain superelasticity PVA/MCNTS hydrogel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477009.4A CN110330747B (en) | 2019-06-03 | 2019-06-03 | Preparation method and application of large-strain superelasticity PVA/MCNTS hydrogel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110330747A true CN110330747A (en) | 2019-10-15 |
| CN110330747B CN110330747B (en) | 2021-07-16 |
Family
ID=68141012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910477009.4A Expired - Fee Related CN110330747B (en) | 2019-06-03 | 2019-06-03 | Preparation method and application of large-strain superelasticity PVA/MCNTS hydrogel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110330747B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860280A (en) * | 2019-12-31 | 2020-03-06 | 新兴远建（天津）新材料科技有限公司 | Composite hybrid hydrogel with high adsorption capacity and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140134415A1 (en) * | 2012-11-09 | 2014-05-15 | The United States Of America As Represented By The Secretary Of Agriculture | Sustainable hybrid organic aerogels and methods and uses thereof |
| CN109111581A (en) * | 2018-06-11 | 2019-01-01 | 中原工学院 | A kind of preparation method of high-strength conductive polyvinyl alcohol composite hydrogel |
-
2019
- 2019-06-03 CN CN201910477009.4A patent/CN110330747B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140134415A1 (en) * | 2012-11-09 | 2014-05-15 | The United States Of America As Represented By The Secretary Of Agriculture | Sustainable hybrid organic aerogels and methods and uses thereof |
| CN109111581A (en) * | 2018-06-11 | 2019-01-01 | 中原工学院 | A kind of preparation method of high-strength conductive polyvinyl alcohol composite hydrogel |
Non-Patent Citations (3)
| Title |
|---|
| MAITY, D: "《Polyvinyl alcohol wrapped multiwall carbon nanotube (MWCNTs) network on fabrics for wearable room temperature ethanol sensor》", 《SENSORS AND ACTUATORS B: CHEMICAL》 * |
| 徐朝阳等: "《MWCNTs增强聚乙二醇-聚乙烯醇复合水凝胶的制备及性能》", 《复合材料学报》 * |
| 程亚玮,李欢军,张公正: "<碳纳米管基聚合物水凝胶研究进展>", <中国科技论文> * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110860280A (en) * | 2019-12-31 | 2020-03-06 | 新兴远建（天津）新材料科技有限公司 | Composite hybrid hydrogel with high adsorption capacity and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110330747B (en) | 2021-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Xu et al. | Plasma modification of PU foam for piezoresistive sensor with high sensitivity, mechanical properties and long-term stability | |
| CN106601329B (en) | A kind of flexible nano friction generator, preparation method and manufactured sensor | |
| Li et al. | Flexible conductive hydrogel fabricated with polyvinyl alcohol, carboxymethyl chitosan, cellulose nanofibrils, and lignin-based carbon applied as strain and pressure sensor | |
| KR100695185B1 (en) | Method for obtaining macroscopic fibres and strips from colloidal particles and in particular carbon nanotubes | |
| CN105907009B (en) | The preparation of conductive polymer composite and its application in strain transducer | |
| Hu et al. | Tough and stretchable Fe3O4/MoS2/PAni composite hydrogels with conductive and magnetic properties | |
| CN109929248B (en) | Preparation method of carbon nano tube fiber/polydimethylsiloxane composite conductive elastomer | |
| CN112414294B (en) | Preparation method of high-sensitivity sandwich interlayer strain sensor | |
| CN108409997A (en) | A kind of preparation method of the superhigh intensity anisotropy hydrogel containing Cellulose nanocrystal palpus | |
| CN110330747A (en) | A kind of preparation method and application of big strain super-elasticity PVA/MCNTS hydrogel | |
| CN112679753A (en) | Super-soft conductive self-healing hydrogel and preparation method and application thereof | |
| CN112210088A (en) | Conductive hydrogel and preparation method and application thereof | |
| Cao et al. | MXene-enhanced deep eutectic solvent-based flexible strain sensor with high conductivity and anti-freezing using electrohydrodynamic direct-writing method | |
| CN116376058A (en) | Aramid nanofiber conductive hydrogel and preparation method and application thereof | |
| CN110256704B (en) | Preparation method of flexible conductive polyurethane composite film | |
| Mu et al. | High strength, anti-freezing and conductive silkworm excrement cellulose-based ionic hydrogel with physical-chemical double cross-linked for pressure sensing | |
| CN111312433B (en) | Fiber composite material conductive film with interface interlocking structure and preparation method thereof | |
| CN109233213B (en) | Poly (glycerol sebacate) 3D printing nano-generator and preparation method and application thereof | |
| CN114858046B (en) | Method for improving sensitivity of polymer-based flexible strain sensor | |
| CN111218085B (en) | Preparation method of bendable porous conductive composite material with double-layer structure | |
| CN113332936A (en) | High-toughness conductive anti-freezing carbon nanotube organic hydrogel | |
| CN110993145A (en) | Stretchable flexible conductive composite material and preparation method and application thereof | |
| CN116178865B (en) | Transparent conductive hydrogel with high compressive strength and low energy dissipation and preparation method thereof | |
| CN117245934B (en) | Flexible stretching sensor based on microelectronic printing and preparation method thereof | |
| CN114907613B (en) | Carbon nano tube/polydopamine-reduced graphene oxide/three-dimensional interconnected porous silicon rubber composite material, and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210716 |