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High-strength, anti-freezing and transparent conductive PVA/quaternary ammonium salt elastomer

A quaternary ammonium salt, high-strength technology, used in electric/magnetic solid deformation measurement, electromagnetic measurement device, bulk chemical production, etc. The effect of excellent optical clarity

Active Publication Date: 2022-08-05
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

2. PVA melting temperature (T m ) is too close to the degradation temperature to be melt-processed

Method used

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  • High-strength, anti-freezing and transparent conductive PVA/quaternary ammonium salt elastomer
  • High-strength, anti-freezing and transparent conductive PVA/quaternary ammonium salt elastomer
  • High-strength, anti-freezing and transparent conductive PVA/quaternary ammonium salt elastomer

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preparation example Construction

[0043] On the other hand, the preparation method of high-strength, frost-resistant and transparent conductive PVA / quaternary ammonium salt elastomer comprises the following steps:

[0044] Step (1) adding PVA and quaternary ammonium salt into the reactor according to a certain proportion to carry out solution blending; wherein the mass ratio of quaternary ammonium salt and PVA is 15-30:100. The solvent is water. The temperature was 80°C.

[0045] Step (2) The above solution blended by the solution is filmed, dried to remove the solvent to obtain a PVA / quaternary ammonium salt elastomer, and finally the performance is characterized.

Embodiment 1

[0050] Step (1) First, 10g of PVA and 1g of ChCl were added to the reaction kettle, the temperature was 80°C, and the solution was mixed for 6h;

[0051] Step (2) Cool the solution to room temperature, pour it into a PTFE mold for film laying, evaporate the solvent on the obtained film, and vacuum dry for 24 hours. Note 15wt%-PVA elastomer.

Embodiment 2

[0053] Step (1) First, 10g of PVA and 1g of ChCl were added to the reaction kettle, the temperature was 80°C, and the solution was mixed for 6h;

[0054] Step (2) Cool the solution to room temperature, pour it into a PTFE mold for film laying, evaporate the solvent on the obtained film, and vacuum dry for 24 hours. Note 20wt%-PVA elastomer.

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Abstract

The invention discloses a high-strength, anti-freezing and transparent conductive PVA / quaternary ammonium salt elastomer. The PVA / quaternary ammonium salt elastomer is prepared by a melt blending modification method and a volatilization film forming method; the mass ratio of the quaternary ammonium salt to the polyvinyl alcohol is (15-30): 100. The polyvinyl alcohol conductive elastomer disclosed by the invention has excellent mechanical properties, optical transparency and conductivity. Quaternary ammonium salt uniformly distributed in a PVA composite material matrix is fused and ionized due to hydrogen bond interaction, so that the glass-transition temperature (Tg), the melting temperature (Tm) and the crystallization property of PVA are greatly changed, the Tg and the Tm are reduced, the crystallization capacity of PVA is reduced, meanwhile, the composite material becomes soft due to the fact that the free volume of a PVA molecular chain is increased, and the PVA composite material has good mechanical properties. And the crystalline region is used as a physical cross-linking point to provide the recovery capability for the composite material, so that the high-strength, anti-freezing and transparent conductive PVA / quaternary ammonium salt elastomer can be obtained.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a high-strength, antifreeze and transparent conductive PVA / quaternary ammonium salt elastomer and a preparation method thereof, in particular to a method for melting and ionizing quaternary ammonium salt through hydrogen bond interaction Preparation method of polymer composite material with uniform distribution inside the material. Background technique [0002] With the advent of flexible electronic devices such as flexible displays, smart clothes, and implantable medical devices, it is expected to bring great changes to human daily life. Among them, flexible wearable sensors are widely used in health diagnosis, sports monitoring, rehabilitation medicine, entertainment and other fields due to their stretchability, bendability, lightness and portability, and excellent electrical properties. In recent years, flexible wearable stress sensors have made significant progress, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08K5/19C08J5/18G01B7/16
CPCC08K5/19C08J5/18G01B7/18C08J2329/04C08L29/04Y02P20/54
Inventor 李勇进王莲郑乐天
Owner HANGZHOU NORMAL UNIVERSITY
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