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A kind of modified polyvinyl alcohol copolymer and its preparation and gel polymer electrolyte

A technology of polyvinyl alcohol copolymer and gel polymer, which is applied in the direction of hybrid capacitor electrolyte, etc., can solve the problems of poor electrolyte resistance and easy flocculation, and achieve the effect of improving mechanical properties and capacitance properties, and excellent electrolyte resistance

Active Publication Date: 2019-05-03
GUANGDONG PHARMA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, the PVA-based gel polymer aqueous solution has poor electrolyte resistance and is easy to flocculate, so it is not suitable for the preparation of water-based gel polymer electrolytes with adjustable water content.

Method used

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  • A kind of modified polyvinyl alcohol copolymer and its preparation and gel polymer electrolyte
  • A kind of modified polyvinyl alcohol copolymer and its preparation and gel polymer electrolyte
  • A kind of modified polyvinyl alcohol copolymer and its preparation and gel polymer electrolyte

Examples

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Effect test

Embodiment 1

[0030] Embodiment 1, modified polyvinyl alcohol copolymer of the present invention and preparation thereof

[0031] S1. Dissolution of polyvinyl alcohol: Weigh 10g of polyvinyl alcohol solid and place it in a three-necked flask, add 50mL of water, heat it in a water bath at 60°C, stir and swell for 0.5h, and add water during the swelling process to make the total volume 60mL ; Then raise the temperature to 95°C, keep stirring at 95°C until the polyvinyl alcohol solid is completely dissolved, and cool naturally to obtain a polyvinyl alcohol solution for later use;

[0032] S2. Graft modification of polyvinyl alcohol: Weigh 8 g of the polyvinyl alcohol solution, put it into a three-necked flask, and heat it in a water bath at 40-45°C; then pass argon gas into the three-necked flask for 4 After ~6min, add 7mL of N-vinylpyrrolidone and 0.4mL of 2-hydroxyethyl methacrylate, stir evenly, then add acidic cerium ion solution; keep the water bath temperature at 40-45°C, continue argon ...

Embodiment 2

[0034] Embodiment 2, modified polyvinyl alcohol copolymer of the present invention and preparation thereof

[0035] S1. Dissolution of polyvinyl alcohol: Weigh 10g of polyvinyl alcohol solid and place it in a three-necked flask, add 50mL of water, heat it in a water bath at 60°C, stir and swell for 0.5h, and add water during the swelling process to make the total volume 60mL ; Then raise the temperature to 95°C, keep stirring at 95°C until the polyvinyl alcohol solid is completely dissolved, and cool naturally to obtain a polyvinyl alcohol solution for later use;

[0036] S2. Graft modification of polyvinyl alcohol: Weigh 12 g of the polyvinyl alcohol solution, put it into a three-necked flask, and heat it in a water bath at 40-45°C; then pass argon gas into the three-necked flask, 4 After ~6min, add 14mL of N-vinylpyrrolidone and 1mL of glycidyl methacrylate, stir well, then add acidic cerium ion solution; keep the temperature of the water bath at 40-45°C, continue to pass ar...

Embodiment 3

[0038] Embodiment 3, modified polyvinyl alcohol copolymer of the present invention and preparation thereof

[0039] S1. Dissolution of polyvinyl alcohol: Weigh 10g of polyvinyl alcohol solid and place it in a three-necked flask, add 50mL of water, heat it in a water bath at 60°C, stir and swell for 0.5h, and add water during the swelling process to make the total volume 60mL ; Then raise the temperature to 95°C, keep stirring at 95°C until the polyvinyl alcohol solid is completely dissolved, and cool naturally to obtain a polyvinyl alcohol solution for later use;

[0040] S2. Grafting modification of polyvinyl alcohol: Weigh 10 g of the polyvinyl alcohol solution, put it into a three-necked flask, and heat it in a water bath at 40-45°C; then pass argon gas into the three-necked flask, 4 After ~6min, add 12mL of N-vinylpyrrolidone and 0.7mL of 2-hydroxyethyl methacrylate, stir evenly, then add acidic cerium ion solution; keep the water bath temperature at 40-45°C, continue argo...

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Abstract

The invention specifically discloses a modified polyvinyl alcohol copolymer, a preparation method thereof, and a gel polymer electrolyte containing the modified polyvinyl alcohol copolymer. The preparation method of the modified polyvinyl alcohol copolymer comprises: weighing the polyvinyl alcohol solid, adding water to swell, heating up and dissolving, placing it in a water bath at 40-45°C, heating it, blowing argon, and then adding N-vinylpyrrolidone and functional After the monomer is stirred evenly, the acidic cerium ion solution is added and reacted for 3-5 hours to obtain a modified polyvinyl alcohol copolymer, which has excellent electrolyte resistance. The modified polyvinyl alcohol copolymer of the present invention is used as a matrix material, glutaraldehyde or borax is used as a crosslinking agent, and an appropriate amount of electrolyte (LiCl or LiOH) is added to prepare a neutral and alkaline solution with ideal mechanical properties and capacitance properties. The gel polymer electrolyte, and the water content in the gel can be adjusted, which meets the good application in flexible solid-state supercapacitors.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and specifically relates to a modified polyvinyl alcohol copolymer, a preparation method thereof, and a gel polymer electrolyte containing the modified polyvinyl alcohol copolymer. Background technique [0002] As a necessary functional material for the assembly of flexible solid supercapacitors, gel polymer electrolyte not only directly affects its capacitance, rate performance, high and low temperature performance, etc., but also can avoid liquid leakage, and is safe and convenient to use. It is very suitable for flexible electronics and energy storage devices. [0003] Currently, gel polymer electrolytes used in the assembly of flexible solid supercapacitors usually consist of three parts: gel polymer (matrix material), organic / aqueous solvent (plasticizer) and electrolyte. Typical representatives of matrix materials are: polyacrylic acid (PAA or PAAK), polyethylene oxide (PEO), pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F261/04C08F226/10C08F220/28C08F220/32C08F4/40C08J3/24C08J3/075H01G11/56C08L51/00
CPCH01G11/56C08F4/40C08F261/04C08J3/075C08J3/24C08J2351/00C08F220/325C08F220/281Y02E60/13
Inventor 刘意肖儒坚王昊
Owner GUANGDONG PHARMA UNIV
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