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High-strength antifreeze conductive polypyrrole hydrogel and preparation method thereof

A conductive hydrogel and pyrrole hydrogel technology is applied in the field of high-strength antifreeze conductive polypyrrole hydrogel and its preparation, which can solve the disadvantages of wide-scale popularization, high price of dopamine modifiers, and complicated preparation process. problem, to achieve the effect of high toughness, low cost and excellent electrical conductivity

Active Publication Date: 2019-05-21
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this kind of hydrogel has good electrical conductivity and mechanical properties, the preparation process is cumbersome, and the price of dopamine modifiers is also high, which is not conducive to large-scale popularization and use in industry and life.

Method used

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  • High-strength antifreeze conductive polypyrrole hydrogel and preparation method thereof
  • High-strength antifreeze conductive polypyrrole hydrogel and preparation method thereof
  • High-strength antifreeze conductive polypyrrole hydrogel and preparation method thereof

Examples

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Embodiment 1

[0033] A preparation method of high-strength antifreeze conductive polypyrrole hydrogel, comprising the steps

[0034] 1) Dissolve 10 parts of PVA with a molecular weight of 67000 in 90 parts of deionized water, and divide the resulting solution into two parts (about 50 ml each); add 0.670 parts of pyrrole and 0.164 parts of methyl Orange, and 0.5 parts of tannic acid and 0.3 parts of gallic acid, apply ultrasonic waves to make the above-mentioned substances dissolve and disperse uniformly in the polymer stabilizer solution. Add 5.4 parts of ferric chloride to another part of the PVA solution, fully stir to dissolve and mix evenly;

[0035] 2) Quickly mix the two solutions obtained above, pour them into a sealed plastic mold immediately after fully stirring, place the mold together with the mold in an ice bath at -50°C for 8 hours, and then place it at -15°C for 72 hours;

[0036] 3) Take out the frozen sample, thaw it at room temperature, and then freeze and thaw it again. A...

Embodiment 2

[0039] A preparation method of high-strength antifreeze conductive polypyrrole hydrogel, comprising the following steps:

[0040] 1) Dissolve 7.5 parts of PVA with a molecular weight of 145,000 in 92.5 parts of deionized water, and divide the resulting solution into two parts (about 50ml each); add 0.67 parts of pyrrole and 0.1 part of methyl orange to one part of the PVA solution , 0.64 parts of ethyl orange and 0.5 parts of gallic acid, ultrasonic waves are applied to dissolve and disperse the above-mentioned substances in the PVA solution evenly. Add 2.7 parts of ferric chloride hexahydrate and 2.0 parts of ferric nitrate to another part of the PVA solution, fully stir to dissolve and mix evenly;

[0041] 2) Quickly mix the two solutions obtained above, and pour them into a sealed plastic mold immediately after fully stirring, freeze together with the mold in an ice bath at -50°C for 8 hours, and then place it in an environment of -10°C for 24 hours;

[0042] 3) Take out t...

Embodiment 3

[0045] A preparation method of high-strength antifreeze conductive polypyrrole hydrogel, comprising the following steps:

[0046] 1) Dissolve 5 parts of PVA with a molecular weight of 205,000 in 95 parts of deionized water, and divide the resulting solution into two parts (about 50 ml each); add 0.3 parts of pyrrole and 0.08 parts of methyl orange to one part of the PVA solution and 0.3 parts of ellagic acid, apply ultrasound to make the above-mentioned substances dissolve and disperse evenly in the PVA solution. Add 3.00 parts of ferric sulfate to another part of the polymer PVA solution, stir fully to dissolve and mix evenly;

[0047] 2) Quickly mix the two solutions obtained above, and pour them into a sealed plastic mold immediately after fully stirring, freeze together with the mold in an ice bath at -40°C for 10 hours, and then place it at -15°C for 24 hours;

[0048] 3) Take out the frozen sample, thaw it at room temperature, freeze and thaw it again, repeat the freezi...

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Abstract

The invention discloses a high-strength antifreeze conductive polypyrrole hydrogel and a preparation method thereof, and belongs to the field of polymer materials. The high-strength antifreeze conductive polypyrrole hydrogel is obtained by in-situ chemical oxidative polymerization of a pyrrole monomer in a hydrogen bond-enhanced polymer network, multiple freezing and thawing cycles, and partial displacement of moisture in the gel by a low freezing point medium. The method is wide in raw material source and easy to operate and facilitates industrial production. The high-strength antifreeze conductive polypyrrole hydrogel prepared with the method has good electrical conductivity and mechanical properties, can withstand a relatively wide temperature range, and is unlikely to lose water, shrink and freeze. The high-strength antifreeze conductive polypyrrole hydrogel can withstand subzero 20 DEG C for 72 hours without being frozen, can be placed at 80 DEG C for 4 hours without drying and shrinking, and has an electrical conductivity of 0.5-1.5 S / m, a tensile strength of 0.5 MPa and a compressive elastic modulus of 200 kPa.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a high-strength antifreeze conductive polypyrrole hydrogel and a preparation method thereof, in particular to a high-strength antifreeze conductive hydrogel based on conductive polypyrrole and a hydrogen bond-enhanced polymer network and its preparation method. Background technique [0002] Hydrogel is a kind of soft material composed of a three-dimensional polymer network containing a large amount of water. It has a medium composition similar to that of a living body and good flexibility. It has unique properties and broad application prospects. Relying on the conductive polymer hydrogel constructed by the hydrogel matrix, it can conveniently convert stimuli such as strain, pressure and temperature into electrical signals and conduct them. It is a very attractive flexible electronic material (patent CN108376618A, patent CN106009000A, etc.). However, due to the contradiction betw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L79/04C08J3/075C08G73/06
Inventor 李瑜井新利周峰蒋在航郑元锁
Owner XI AN JIAOTONG UNIV
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