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Polyacid-polyaniline-glycerol-polyvinyl alcohol composite gel and preparation method thereof

A polyvinyl alcohol and composite gel technology, applied in the field of conductive polymers, can solve the problems of low sensitivity, poor conductivity of conductive gel, slow response, etc., achieve broad application prospects, enhance dispersion performance, and improve the effect of antifreeze

Pending Publication Date: 2021-09-10
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a polybasic acid-polyaniline-glycerin-polyvinyl alcohol composite gel and its preparation method to solve the problems of poor conductivity, low sensitivity and slow response of existing conductive gels

Method used

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  • Polyacid-polyaniline-glycerol-polyvinyl alcohol composite gel and preparation method thereof
  • Polyacid-polyaniline-glycerol-polyvinyl alcohol composite gel and preparation method thereof
  • Polyacid-polyaniline-glycerol-polyvinyl alcohol composite gel and preparation method thereof

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preparation example Construction

[0028] combine figure 1 As shown, the embodiment of the present invention provides a preparation method of polybasic acid-polyaniline-glycerin-polyvinyl alcohol composite gel, comprising the following steps:

[0029] S1. Add polyaniline to deionized water, and uniformly disperse it into a nano-sized polyaniline suspension under the action of ultrasound;

[0030] S2, adding polybasic acid to the polyaniline suspension, stirring to obtain a mixed liquid system;

[0031] S3. Add polyvinyl alcohol and glycerin to the mixed liquid system, heat it in a water bath, pour it into a polytetrafluoroethylene mold to form a composite system, and freeze the composite system under the first preset condition;

[0032] S4. Thaw the frozen composite system, and let it stand under the second preset condition to prepare polyacid-polyaniline-glycerol-polyvinyl alcohol composite gel.

[0033] It is understandable that polyvinyl alcohol (PVA), as a material, is widely used in the process of prepar...

Embodiment 1

[0046] This embodiment provides a preparation method of polybasic acid-polyaniline-glycerin-polyvinyl alcohol composite gel, which specifically includes the following steps:

[0047] 1) Add polyaniline to deionized water, stir and sonicate to obtain a suspension with a concentration of 5 mg / mL;

[0048] 2) Add 25 mg of tannic acid to the suspension, and stir for 8 hours to obtain a mixed liquid system;

[0049] 3) Add 1.5g of polyvinyl alcohol powder and 5mL of glycerin to the mixed liquid system, and after heating in a water bath at 95°C, pour it into a polytetrafluoroethylene mold and store it at minus 30°C for 8 hours.

[0050] 4) The frozen composite system was thawed at room temperature, and placed at 4°C for 6 hours after thawing to obtain a polyacid-polyaniline-glycerol-polyvinyl alcohol composite gel.

[0051] The polybasic acid-polyaniline-glycerin-polyvinyl alcohol composite gel prepared in the present embodiment 1 is subjected to a tensile test, and the test condit...

Embodiment 2

[0055] This embodiment provides a preparation method of polybasic acid-polyaniline-glycerin-polyvinyl alcohol composite gel, the difference from Example 1 is:

[0056] In step 1), polyaniline is added to deionized water, stirred and ultrasonicated to obtain a suspension with a concentration of 10 mg / mL;

[0057] All the other steps and parameters are the same as in Example 1.

[0058] The polybasic acid-polyaniline-glycerin-polyvinyl alcohol composite gel that embodiment 2 makes is carried out tensile test, and test condition is: under room temperature environment, with the universal testing machine that 1kN load cell is housed, sample size during test is 2mm×6mm×30mm, the moving speed of the mold is set to 50mm / min.

[0059] As shown in Table 1, the polybasic acid-polyaniline-glycerol-polyvinyl alcohol composite gel obtained in Example 2 has resistance change rates of 90%, 50%, and 75% when stretched to the original length of 25%, 50%, and 75%, respectively. 160%, 260%, the...

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Abstract

The invention provides polyacid-polyaniline-glycerin-polyvinyl alcohol composite gel and a preparation method thereof. The preparation method comprises the following steps of: S1, adding polyaniline into deionized water, and conducting ultrasonic stirring to obtain polyaniline suspension liquid; S2, adding polyacid into the polyaniline suspension liquid, and stirring to obtain a mixed liquid system; S3, adding polyvinyl alcohol and glycerol into the mixed liquid system, heating in a water bath, pouring the mixed liquid system into a polytetrafluoroethylene mold to form a composite system, and freezing the composite system under a first preset condition; and S4, unfreezing the frozen composite system, and carrying out standing under a second preset condition so as to obtain the polyacid-polyaniline-glycerin-polyvinyl alcohol composite gel. The preparation cost is low, the process is simple, good use performance can still be guaranteed in the working environment of below zero DEG C, and the composite gel has a wide application prospect in flexible sensors and electronic devices.

Description

technical field [0001] The invention relates to the technical field of conductive polymers, in particular to a polyacid-polyaniline-glycerin-polyvinyl alcohol composite gel and a preparation method thereof. Background technique [0002] With the development of electronics and high-tech, people hope to combine artificial intelligence with the field of health or environmental monitoring to achieve the purpose of monitoring environmental signals (pressure, humidity, temperature, etc.), human body dynamic signals and health status. Traditional sensor elements integrate circuits on silicon-based semiconductor materials. However, due to the high hardness and poor toughness of this material, it is difficult to adhere to the skin of the human body, so it cannot be used well in the field of detecting human body signals. The flexible sensor has good flexibility, ductility, and can even be repeatedly folded, bent or even stretched. The conductive hydrogel sensor compounded with flexibl...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08L79/02C08L29/04C08K5/053C08K5/1545C08K5/521C08K5/092
CPCC08J3/075C08J2329/04C08J2479/02C08K5/053C08K5/1545C08K5/521C08K5/092
Inventor 王奋钰杜寒威李亮喻湘华刘玉兰黄华波
Owner WUHAN INSTITUTE OF TECHNOLOGY
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