CN113968981A - Preparation method and application of swelling-resistant zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity - Google Patents
Preparation method and application of swelling-resistant zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity Download PDFInfo
- Publication number
- CN113968981A CN113968981A CN202111403416.4A CN202111403416A CN113968981A CN 113968981 A CN113968981 A CN 113968981A CN 202111403416 A CN202111403416 A CN 202111403416A CN 113968981 A CN113968981 A CN 113968981A
- Authority
- CN
- China
- Prior art keywords
- hydrogel
- swelling
- sbma
- sma
- rehydration
- 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.)
- Pending
Links
Images
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
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44C—PERSONAL ADORNMENTS, e.g. JEWELLERY; COINS
- A44C5/00—Bracelets; Wrist-watch straps; Fastenings for bracelets or wrist-watch straps
- A44C5/0007—Bracelets specially adapted for other functions or with means for attaching other articles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
-
- 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
- C08J2333/00—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 only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
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)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a swelling-resistant zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity, and a preparation method and application thereof. The hydrogel is a conductive polymer hydrogel composed of acrylic acid, octadecyl methacrylate and [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide. In this hydrogel, SBMA ([2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide) and a conductive polymer impart conductivity to the hydrogel, and SMA (octadecyl methacrylate) as a hydrophobic monomer achieves a hydrophilic-hydrophobic water balance with hydrophilic zwitterionic SBMA to impart anti-swelling properties to the hydrogel. The P (AA-SMA-SBMA) [ poly (octadecyl acrylate-methacrylate- [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide) ] hydrogel prepared by the method has good stretchability (strain is approximately equal to 170%) and tensile strength (130kPa), can stably output signals and detect human body movement (finger bending, finger pressure, phonation and pulse), can restore the original quality and performance when the dried hydrogel is in swelling balance, can be repeatedly recycled, and has the advantages of unchanged structure and stable performance.
Description
Technical Field
The invention belongs to the technical field of intelligent materials, and particularly relates to a preparation method and application of an anti-swelling and strain-sensitive conductive polymer hydrogel sensing material.
Background
The advent of wearable devices has provided a direction for the development of many industries and fields, among which the electronics industry and healthcare equipment are more prevalent. However, most of wearable devices still have the traditional defects at present, and are low in stretchability and easy to lose water and lose original performance, so that flexible, stretchable and controllable rehydration wearable devices are widely researched so as to adapt to different working environments to a certain extent and meet the deformation requirements of human bodies on the devices, such as electronic skins, photoelectric devices, all-solid-state batteries, touch screens, human body motion strain sensors and the like.
The flexible sensor device can be used for detecting by converting the change of mechanical properties into an electronic signal by being stretched or compressed, i.e. the resistance or capacitance changes when the device is stretched or compressed. This provides the possibility for monitoring the development of human body movement, human-computer interaction, etc. However, the conventional sensor is prepared by embedding conductive materials such as metal, graphene, conductive polymer, etc. into an elastic substrate, and although the sensitivity is high, the sensor has too strong rigidity, poor stretchability, and water volatility, so that the application thereof is limited.
The problem of water loss of the traditional hydrogel is well noticed, so that the problem that the hydrogel loses original performance after water loss is of great significance.
Disclosure of Invention
Aiming at the technical problems of poor strength, toughness and strain sensitivity, easiness in water loss and the like of the traditional hydrogel sensor, the invention aims to provide a high-strain-sensitivity and controllable rehydration conductive polymer hydrogel sensing material and a preparation method and application thereof.
A preparation method and application of an anti-swelling zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity are characterized in that the method specifically comprises the following steps:
adding 9% of SMA (octadecyl methacrylate) and Tween80 (Tween 80) into deionized water, and then stirring the mixture in a water bath kettle at 40 ℃ until the SMA is dissolved;
step (2) then carrying out ultrasonic emulsification on the solution obtained in the step (1) with the power of 300W until the solution becomes uniform milky white liquid;
step (3) adding SBMA ([2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide), AA (acrylic acid), N, N '-Methylene Bisacrylamide (MBA) and Ammonium Persulfate (APS) to the step (2), wherein the SBMA ([2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide) is 10% by mass, the amount of N, N' -Methylene Bisacrylamide (MBA) is 0.5 mol% of the amount of the monomer substances, the amount of Ammonium Persulfate (APS) is 1 mol% of the amount of the monomer substances, stirring at room temperature and 400r/min to completely dissolve the reagent, and obtaining P (AA-SMA) [ poly (octadecyl acrylate- [2- (methacryloyloxy) ethyl ] dimethyl- (3- Sulfopropyl) ammonium hydroxide) ];
and (4) transferring the P (AA-SMA-SBMA) mixed solution obtained in the step (3) into a mould, carrying out heat treatment for 7h at the temperature of 60 ℃, and taking out after the heat treatment is finished to obtain the P (AA-SMA-SBMA) hydrogel.
The mass ratio of the deionized water to the SMA in the mixed solvent in the step (1) is 1: 0.09; the mass ratio of the deionized water to the Tween80 (Tween 80) was 1: 0.02.
The power of ultrasonic emulsification in the step (2) is 300W, and the time is 10 min.
The SBMA mass concentration in the step (3) is 10%.
The mass concentration of AA in the step (3) is 12 percent.
The amount of MBA in the step (3) is 0.5 mol% of the amount of the monomer material.
The amount of APS (ammonium persulfate) in the step (3) is 1 mol% of the amount of the monomer substances.
Compared with the prior art, the invention has the following advantages:
1) most of wearable devices still have the traditional defects at present, the stretchability is low, the wearable devices are easy to lose water and lose original performance, so that the flexible, stretchable and controllable rehydration wearable devices are widely researched, so that the wearable devices can adapt to different working environments to a certain extent, and the deformation requirements of human bodies on the devices are met, the method comprises the steps of uniformly dispersing SMA (octadecyl methacrylate) by using Tween80, adding SBMA to optimize a conductive path, adding AA to improve the mechanical performance of hydrogel, and further obtaining P (AA-SMA-SBMA) conductive polymer hydrogel, wherein the stretching amount of the hydrogel can reach 170%, and the toughness reaches 130 kPa;
2) the flexible, stretchable and controlled-rehydration conductive polymer hydrogel sensor prepared by the invention can repeatedly detect stable electric signals under large strain and small strain, and even can identify pulses before and after movement, so that the sensor can be used for monitoring human body movement and health;
3) the hydrogel prepared by the invention can restore the original quality and appearance by rehydration when losing water and losing the original performance, and the performance of the hydrogel is stable and sensitive as that of the original hydrogel.
The synthesis process of the P (AA-SMA-SBMA) hydrogel sensing material provided by the invention is simple to operate and easy to control, and as the raw materials adopted by the invention have good biocompatibility and nontoxicity, the wearable device prepared by the invention can monitor human body movement and human body health safely and effectively.
Drawings
Fig. 1(a) is a stress-strain curve of the flexible conductive polymer hydrogel in example 1, (B) is a cyclic tensile curve of the flexible conductive polymer hydrogel in example 1, and (C) is a tensile loading-unloading cyclic curve under a gradual increase in strain from 20% to 100% of the flexible conductive polymer hydrogel in example 1;
fig. 2(a) shows the brightness change of the blue diode under stretching of the conductive polymer hydrogel prepared in example 1, (B) the electrical signal response of finger bending at different angles (0 °, 30 °, 60 ° or 90 °), (C) finger pressure, (D) elbow bending from 0o to 90 °, (E) knee bending from 0 degree to 90 °, (F) smile, (G) frown, (H) say "hi", "goodbye" and "hydrogel", and (I) heart beat of the person before and after physical exercise;
FIG. 3 is (A) Raman (B) IR spectra of the conductive polymer hydrogel prepared in example 1 and the hydrogel cycled 1-7 times;
fig. 4 is a resistance change of a finger bent at various degrees (0 °, 30 °, 60 °, or 90 °) using the conductive polymer hydrogel prepared in example 1 and the conductive polymer hydrogel subjected to cycle 2(a), cycle 3(B), cycle 4(C), cycle 5(D), cycle 6(E), and cycle 7 (F).
Detailed Description
The present invention will be further described in detail by the following embodiments, which are implemented on the premise of the technology of the present invention, and the detailed embodiments and the specific operation procedures will be given to illustrate the inventive aspects of the present invention, but the scope of the present invention is not limited to the following embodiments.
Example 1:
a preparation method and application of an anti-swelling zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity are characterized in that the method specifically comprises the following steps:
adding 0.9g of SMA (octadecyl methacrylate) and 200 mu L of Tween80 (Tween 80) into 8.8mL of deionized water, and then stirring the mixture in a water bath kettle at the temperature of 40 ℃ until the SMA is dissolved;
step (2) then carrying out ultrasonic emulsification on the solution obtained in the step (1) with the power of 300W until the solution becomes uniform milky white liquid;
step (3) adding 1g of SBMA ([2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide), 1.2mL of AA (acrylic acid), 0.0176g N, N' -Methylenebisacrylamide (MBA) and 131 μ L of Ammonium Persulfate (APS) of which the concentration is 0.4g/mL to the step (2), and then stirring at room temperature and the rotation speed of 400r/min to completely dissolve the reagent to obtain a P (AA-SMA-SBMA) [ poly (octadecyl acrylate-methacrylate- [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide) ] mixed solution;
and (4) transferring the P (AA-SMA-SBMA) mixed solution obtained in the step (3) into a mould, carrying out heat treatment for 7h at the temperature of 60 ℃, and taking out after the heat treatment is finished to obtain the P (AA-SMA-SBMA) hydrogel.
Example 2:
a preparation method of an anti-swelling zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity is characterized by comprising the following steps:
adding 0.7g of SMA (octadecyl methacrylate) and 200 mu L of Tween80 (Tween 80) into 8.8mL of deionized water, and then stirring the mixture in a water bath kettle at the temperature of 40 ℃ until the SMA is dissolved;
step (2) then carrying out ultrasonic emulsification on the solution obtained in the step (1) with the power of 300W until the solution becomes uniform milky white liquid;
step (3) adding 1g of SBMA ([2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide), 1.2mL of AA (acrylic acid), 0.0172g N, N' -Methylenebisacrylamide (MBA) and 131 μ L of Ammonium Persulfate (APS) of which the concentration is 0.4g/mL to the step (2), and then stirring at room temperature and the rotation speed of 400r/min to completely dissolve the reagent to obtain a P (AA-SMA-SBMA) [ poly (octadecyl acrylate-methacrylate- [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide) ] mixed solution;
and (4) transferring the P (AA-SMA-SBMA) mixed solution obtained in the step (3) into a mould, carrying out heat treatment for 7h at the temperature of 60 ℃, and taking out after the heat treatment is finished to obtain the P (AA-SMA-SBMA) hydrogel.
The tensile stress-strain curve of the flexible conductive polymer hydrogel prepared in specific example 1 is shown in fig. 1(a), from which it can be seen that the hydrogel has superior stretchability (strain ≈ 170%), high tensile strength (130 kPa). Fig. 1(B) is a loading-unloading curve and a compression cycle curve of a hydrogel continuously stretched 5 times at a strain of 100% without dead time, and it can be seen from the graph that the curve obtained by the first loading is obviously different from the curve obtained by the later stretching cycle process after 5 times, because the internal network of the hydrogel is destroyed and can not be immediately recovered, but the stress and the hysteresis energy of the hydrogel are basically kept unchanged after four times of later cycles, which shows that the energy dissipation is limited, and a uniform network structure can be formed after the fracture of some dynamic bonds (electrostatic interaction and hydrogen bond interaction) in the hydrogel, so that the hydrogel has good fatigue resistance. Fig. 1(C) shows the maximum strain increased from 20% to 100% and no dwell time between the two cycles during the test. It can be seen that the magnitude of the hysteresis loop increases gradually with increasing set strain in fig. 1 (C). As the maximum strain increases, the degree of fracture of the hydrogel network increases and more dynamic crosslinking points are destroyed, resulting in a significant increase in hysteresis loop. Successive loading cycles of different staining levels partially overlapped, indicating partial recovery of the hydrogel.
The relative resistance change (Δ R/Ro) curves of the conductive polymer hydrogel prepared in example 1 monitored at different human body sites are shown in FIG. 2. The conductive polymer can monitor the size deformation, and the resistance value of the conductive polymer is almost unchanged after a plurality of cycles, so that the hydrogel has high performance stability. As shown in fig. 2(H), the hydrogel strain sensor is connected to the throat to recognize the speech process, the signal generated by speech is obvious and stable, the process of human body vocalization can be clearly reflected, and the resistance change shows obvious reproducibility when repeatedly uttered; and micro deformation such as pulse can be detected, and even the pulse before and after movement can be identified.
The functional groups of the conductive polymer hydrogel prepared in specific example 1 and the hydrogel cycled 1-7 times were also changed, and the peaks remained highly consistent with the initial hydrogel by infrared and raman tests, as shown in fig. 3(a) and 3 (B).
The conductive polymer hydrogel prepared in the specific example 1 and the conductive polymer hydrogel subjected to the cycles 2(a), 3(B), 4(C), 5(D), 6(E), and 7(F) were stable in the resistance change values of the bent fingers at different degrees (0 °, 30 °, 60 °, or 90 °), which proves that the performance of the P (AA-SMA-SBMA) hydrogel was still sensitive and stable after seven cycles.
Claims (6)
1. A preparation method and application of an anti-swelling zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity are characterized in that the method specifically comprises the following steps:
adding SMA (octadecyl methacrylate) and Tween80 (Tween 80) into deionized water, and then stirring in a water bath kettle at 40 ℃ until the SMA is dissolved;
step (2) then carrying out ultrasonic emulsification on the solution obtained in the step (1) with the power of 300W until the solution becomes uniform milky white liquid;
step (3) adding SBMA ([2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide), AA (acrylic acid), N' -Methylene Bisacrylamide (MBA) and Ammonium Persulfate (APS) into the step (2), wherein the mass concentration of the SBMA is 10%, the amount of the MBA is 0.5 mol% of the amount of the monomer substances, and the amount of the APS is 1 mol% of the amount of the monomer substances, and then stirring at room temperature and the rotating speed of 400r/min to completely dissolve the reagent to obtain a P (AA-SMA-SBMA) [ poly (octadecyl acrylate-methacrylate- [2- (methacryloyloxy) ethyl ] dimethyl- (3-sulfopropyl) ammonium hydroxide) ] mixed solution;
and (4) transferring the P (AA-SMA-SBMA) mixed solution obtained in the step (3) into a mould, carrying out heat treatment for 7h at the temperature of 60 ℃, and taking out after the heat treatment is finished to obtain the P (AA-SMA-SBMA) hydrogel.
2. The preparation method and the application of the swelling-resistant zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity according to claim 1 are characterized in that: in the step (1), the mass concentration of the SMA monomer is 1-11%.
3. The preparation method and the application of the swelling-resistant zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity according to claim 1 are characterized in that: the power of ultrasonic emulsification in the step (2) is 300W, and the time is 10min
4. The preparation method and the application of the swelling-resistant zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity according to claim 1 are characterized in that: in step (3), the mass concentration of SBMA was 10%, the mass concentration of AA was 12%, the amount of MBA was 0.5 mol% and the amount of APS was 1 mol% based on the amount of the monomer material.
5. The preparation method and the application of the swelling-resistant zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity according to claim 1 are characterized in that: the controllable rehydration and high strain sensitivity swelling-resistant zwitterionic hydrogel material prepared by the method can restore the original appearance and performance by soaking deionized water after dehydration.
6. The preparation method and the application of the swelling-resistant zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity according to claim 5 are characterized in that: the P (AA-SMA-SBMA) hydrogel sensing material connected with a lead is fixed on each part of a human body by using an insulating adhesive tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111403416.4A CN113968981A (en) | 2021-11-24 | 2021-11-24 | Preparation method and application of swelling-resistant zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111403416.4A CN113968981A (en) | 2021-11-24 | 2021-11-24 | Preparation method and application of swelling-resistant zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113968981A true CN113968981A (en) | 2022-01-25 |
Family
ID=79590156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111403416.4A Pending CN113968981A (en) | 2021-11-24 | 2021-11-24 | Preparation method and application of swelling-resistant zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113968981A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114573748A (en) * | 2022-04-02 | 2022-06-03 | 南京工业大学 | Underwater adhesion anti-swelling hydrogel and flexible strain sensor |
-
2021
- 2021-11-24 CN CN202111403416.4A patent/CN113968981A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114573748A (en) * | 2022-04-02 | 2022-06-03 | 南京工业大学 | Underwater adhesion anti-swelling hydrogel and flexible strain sensor |
| CN114573748B (en) * | 2022-04-02 | 2022-11-01 | 南京工业大学 | Underwater adhesion anti-swelling hydrogel and flexible strain sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Luan et al. | MXene-based composite double-network multifunctional hydrogels as highly sensitive strain sensors | |
| CN112608431A (en) | Ion-conductive hydrogel and preparation method and application thereof | |
| Liang et al. | Fully physically cross-linked hydrogel as highly stretchable, tough, self-healing and sensitive strain sensors | |
| CN110006327B (en) | A kind of fast preparation method of the flexible strain transducer based on biaxial stretch-formed technology | |
| CN113968981A (en) | Preparation method and application of swelling-resistant zwitterionic hydrogel sensing material with controllable rehydration and high strain sensitivity | |
| CN110426063B (en) | Dual-mode sensor and application thereof in pressure detection and strain process | |
| CN110054856A (en) | The preparation method and applications of low temperature resistant self-healing hydrogel | |
| Wang et al. | Anisotropic hydrogels with high-sensitivity and self-adhesion for wearable sensors | |
| CN110411623B (en) | High-sensitivity flexible piezoresistive sensor and preparation method and application thereof | |
| Zhang et al. | A flexible bifunctional sensor based on porous copper nanowire@ IonGel composite films for high-resolution stress/deformation detection | |
| CN110305345A (en) | A kind of preparation method of nano-cellulose/carbon nano tube flexible touch sensor | |
| CN113773445B (en) | Preparation method and application of hydrogel flexible touch sensor | |
| CN109180962A (en) | A kind of preparation method of PAA class pectin self-healing hydrogel and its capacitance type sensor | |
| Sun et al. | Skin-conformal MXene-doped wearable sensors with self-adhesive, dual-mode sensing, and high sensitivity for human motions and wireless monitoring | |
| Li et al. | Self-powered and high sensitivity ionic skins by using versatile organogel | |
| Gao et al. | A hydrogel sensor driven by sodium carboxymethyl starch with synergistic enhancement of toughness and conductivity | |
| Zhao et al. | Bioinspired wet-resistant organogel for highly sensitive mechanical perception | |
| Liu et al. | Multifunctional conductive hydrogels based on the alkali lignin-Fe3+-mediated Fenton reaction for bioelectronics | |
| CN113372492A (en) | High-performance polyion liquid gel, multi-mode flexible sensor and preparation method thereof | |
| Chen et al. | Microstructured flexible pressure sensor based on nanofibrous films for human motions and physiological detection | |
| Feng et al. | Low hysteresis, anti-freezing and conductive organohydrogel prepared by thiol-ene click chemistry for human-machine interaction | |
| CN114044920A (en) | High-elongation and strain-sensitive conductive polymer hydrogel sensing material and preparation method and application thereof | |
| CN115028861A (en) | High-conductivity double-network hydrogel and preparation method and flexible sensing application thereof | |
| CN114957538A (en) | Self-healing gel based on dynamic non-covalent bond effect and preparation method and application thereof | |
| CN114560970B (en) | Ion conductive hydrogel and preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication |