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High-molecular hydrogel film with piezoelectric property as well as preparation and application of high-molecular hydrogel film

A polymer hydrogel, piezoelectric performance technology, applied in seawater treatment, water/sewage treatment, general water supply conservation, etc. Piezoelectric output capability, increased water activation capability, effect of high output voltage

Active Publication Date: 2022-06-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, directly adding an electric field to water will introduce additional complex devices and huge energy, which cannot meet the current concept of green and sustainable development
[0004] In the prior art, there is no relevant report on the application of composite materials with piezoelectric layer structure and polymer hydrogel in the field of promoting water evaporation

Method used

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  • High-molecular hydrogel film with piezoelectric property as well as preparation and application of high-molecular hydrogel film
  • High-molecular hydrogel film with piezoelectric property as well as preparation and application of high-molecular hydrogel film
  • High-molecular hydrogel film with piezoelectric property as well as preparation and application of high-molecular hydrogel film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A kind of polyvinyl alcohol hydrogel composite film, its preparation method is as follows:

[0048] First prepare a porous polymer piezoelectric film: take 0.75g of polyvinylidene fluoride-trifluoroethylene copolymer and add it to 5ml of a mixed solution of N,N-dimethylformamide and acetone (N,N-difluoroethylene in the mixed solution The volume ratio of methylformamide and acetone is 3:2), stirring at room temperature to make it fully dissolved; the mixed solution is prepared into a film by electrospinning technology, and the rotation speed of the collecting roller is adjusted to 3000rpm to obtain a highly oriented structure. Fiber membrane; put the aforementioned fiber membrane in an oven at 60° C. for 24 hours to remove residual solvent; obtain the final piezoelectric membrane with a highly oriented structure. Get 100mg of graphene oxide powder and add it to a mixed solution of 50ml of deionized water and glycerol (the mass ratio of water and glycerol in the mixed sol...

Embodiment 2

[0054] A kind of polyvinyl alcohol hydrogel composite film, its preparation method is as follows:

[0055] First prepare a porous polymer piezoelectric film: take 0.75g of polyvinylidene fluoride and add it to 5ml of a mixed solution of N,N-dimethylformamide and acetone (N,N-dimethylformamide and acetone in the mixed solution The volume ratio is 3:2), stirring at room temperature to make it fully dissolved; the mixed solution is prepared into a film by electrospinning technology, and the rotating speed of the collecting roller is adjusted to 3000rpm to obtain a fiber film with a highly oriented structure; The film was placed in an oven at 60°C for 24 hours to remove residual solvent; the final piezoelectric film with a highly oriented structure was obtained.

[0056] Get 100mg of graphene oxide powder and add it to a mixed solution of 50ml of deionized water and glycerol (the mass ratio of water and glycerol in the mixed solution is 9:1), and ultrasonically treat it for 30min to...

Embodiment 3

[0059] A kind of polyvinyl alcohol hydrogel composite film, its preparation method is as follows:

[0060] First prepare a porous polymer piezoelectric film: take 0.75g of polyvinylidene fluoride-trifluoroethylene copolymer and add it to 5ml of a mixed solution of N,N-dimethylformamide and acetone (N,N-difluoroethylene in the mixed solution The volume ratio of methylformamide and acetone is 3:2), stirring at room temperature to make it fully dissolved; the mixed solution is prepared into a film by electrospinning technology, and the rotation speed of the collecting roller is adjusted to 3000rpm to obtain a highly oriented structure. Fiber membrane; put the aforementioned fiber membrane in an oven at 60° C. for 24 hours to remove residual solvent; obtain the final piezoelectric membrane with a highly oriented structure.

[0061] Take 25mg of graphene oxide powder and add it to a mixed solution of 50ml of deionized water and glycerol (the mass ratio of water and glycerol in the ...

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Abstract

The invention belongs to the field of polymer composite materials, and relates to a polymer hydrogel film with piezoelectric property and preparation and application thereof. The invention provides a high-molecular hydrogel film with piezoelectric property, the high-molecular hydrogel film comprises an outer layer and an inner layer, the outer layer is high-molecular hydrogel, and the inner layer is a piezoelectric polymer film. The invention provides a novel high-molecular hydrogel film with piezoelectric property, and due to the characteristic of high hydration of hydrogel, a molecular chain can more strongly capture surrounding water molecules to influence a hydrogen bond network in water so as to activate the water; in addition, due to the fact that the hydrogel film has the piezoelectric property, by means of the piezoelectric property of the film, the film can continuously convert wave energy in the ocean into electric energy, the electric energy can be used for further activating water which is activated by the hydrogel and located around molecular chains, and meanwhile unaffected water which is far away from the molecular chains in the hydrogel can be activated; energy required by water evaporation is reduced again, and the water evaporation process is promoted synergistically.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a polymer hydrogel film with piezoelectric properties and its preparation and application. Background technique [0002] In recent years, the shortage of water resources has become more and more obvious. By 2030, people's demand for fresh water will reach 6.9 trillion cubic meters per year. Although 70% of the earth's surface is covered by water, only 2.5% is freshwater, and 87% of this freshwater is located in polar ice caps and alpine glaciers, making it difficult for humans to use it. Solar energy is a clean and renewable energy source. Using solar energy to heat water to generate steam, desalinate seawater or treat sewage, clean water resources can be obtained. [0003] The technology of solar energy conversion to heat energy is a technology that directly obtains solar energy for energy storage and heat generation. So far, the technology of co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L27/16C08K3/04C08J5/18C02F1/14C02F103/08
CPCC08J5/18C02F1/14C02F1/043C02F2103/08C08J2329/04C08J2427/16C08K3/042Y02A20/212
Inventor 杨伟孟森杨洁包睿莹刘正英杨鸣波
Owner SICHUAN UNIV
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