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Preparation method of quaternized polyvinyl alcohol/chitosan electrospinning solid electrolyte film

A technology of solid electrolyte and polyvinyl alcohol, which is applied in the direction of textiles and papermaking, non-woven fabrics, fiber types, etc., can solve the problems of high price of Nafion film, limitation of fuel cell efficiency and development, high fuel, etc., to improve ion conductivity , Improve dimensional stability and reduce production cost

Inactive Publication Date: 2018-11-16
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Nafion membrane is expensive, and there is a problem of high fuel penetration, which limits the efficiency and development of fuel cells

Method used

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  • Preparation method of quaternized polyvinyl alcohol/chitosan electrospinning solid electrolyte film
  • Preparation method of quaternized polyvinyl alcohol/chitosan electrospinning solid electrolyte film
  • Preparation method of quaternized polyvinyl alcohol/chitosan electrospinning solid electrolyte film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Take 2.0 g of quaternized polyvinyl alcohol and add it to 23 ml of deionized water, heat and stir in a water bath at 85° C. to dissolve to obtain an aqueous solution of quaternized polyvinyl alcohol;

[0032] (2) By electrospinning, spin the quaternized polyvinyl alcohol aqueous solution in step (1) to obtain a quaternized polyvinyl alcohol nanofiber membrane, wherein the electrospinning conditions are negative low voltage -1 kV, positive The high voltage is 15kV, and the pushing speed is 0.1mm / min;

[0033] (3) using 10 wt% glutaraldehyde solution to carry out steam crosslinking reaction to the quaternized polyvinyl alcohol nanofiber membrane obtained in (2), to obtain a crosslinked quaternized polyvinyl alcohol nanofiber membrane;

[0034] (4) Add 1.0 g of quaternized polyvinyl alcohol into 24 ml of deionized water, heat and stir in a water bath at 95°C to obtain a quaternized polyvinyl alcohol solution; add 2.0 g of chitosan and 1.0 g of aluminum chloride to 97 m...

Embodiment 2

[0038] (1) Take 2.0 g of quaternized polyvinyl alcohol and add it to 20 ml of deionized water, heat and stir in a water bath at 85° C. to dissolve to obtain an aqueous solution of quaternized polyvinyl alcohol;

[0039] (2) By electrospinning, spin the quaternized polyvinyl alcohol aqueous solution in step (1) to obtain a quaternized polyvinyl alcohol nanofiber membrane, wherein the electrospinning conditions are negative low voltage -1 kV, positive The high voltage is 18 kV, and the pushing speed is 0.3mm / min;

[0040] (3) using 25 wt% glutaraldehyde solution to carry out steam crosslinking reaction to the quaternized polyvinyl alcohol nanofiber membrane obtained in (2), to obtain a crosslinked quaternized polyvinyl alcohol nanofiber membrane;

[0041] (4) Add 1.0 g of quaternized polyvinyl alcohol into 9.0 ml of deionized water, heat and stir in a water bath at 95°C to obtain a quaternized polyvinyl alcohol solution; add 3.0 g of chitosan and 1.5 g of aluminum chloride to 95...

Embodiment 3

[0045] (1) Take 1.0 g of quaternized polyvinyl alcohol and add it to 6.14 ml of deionized water, heat and stir in a water bath at 85°C to dissolve to obtain an aqueous solution of quaternized polyvinyl alcohol;

[0046] (2) By electrospinning, spin the quaternized polyvinyl alcohol aqueous solution in step (1) to obtain a quaternized polyvinyl alcohol nanofiber membrane, wherein the electrospinning conditions are negative low voltage -1 kV, positive The high voltage is 20 kV, and the pushing speed is 0.4 mm / min;

[0047] (3) using 10 wt% glutaraldehyde solution to carry out steam crosslinking reaction to the quaternized polyvinyl alcohol nanofiber membrane obtained in (2), to obtain a crosslinked quaternized polyvinyl alcohol nanofiber membrane;

[0048] (4) Add 1.0 g of quaternized polyvinyl alcohol into 12 ml of deionized water, heat and stir in a water bath at 95°C to obtain a quaternized polyvinyl alcohol solution; add 2.5 g of chitosan and 2.0 g of aluminum chloride to 96...

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Abstract

The invention discloses a preparation method and application of a quaternized polyvinyl alcohol / chitosan electrospinning solid electrolyte film. A nanospun fiber film of quaternized polyvinyl alcoholis prepared by an electrospinning technology first, and then steam crosslinking is performed on the nanospun fiber film by using glutaraldehyde so as to improve the stability thereof; the crosslinkedspun fiber film is immersed in a mixed solution of the quaternized polyvinyl alcohol and chitosan to obtain a sandwiched nanofiber composite film; the prepared film is immersed in a KOH solution to obtain the quaternized polyvinyl alcohol / chitosan electrospinning solid electrolyte film. In the electrolyte film, due to existence of a pore structure and silky fiber of the nanofiber film, more amorphous regions and ion transport channels can be formed, so that the conductivity of the electrolyte film is improved; the ionic conductivity of the composite film reaches 4.37*10< -2>S / cm.

Description

technical field [0001] The invention belongs to the technical field of material preparation and electrochemistry, and in particular relates to a preparation method and application of a quaternized polyvinyl alcohol / chitosan electrospun solid electrolyte film. Background technique [0002] The polymer electrolyte film can be used as a solid electrolyte for the core device of a high-performance fuel cell, and can also be used in a fuel cell to prevent the penetration of fuel substances between the positive and negative electrodes of the battery. The current commercial application is Nafion separator, which has good chemical and physical stability and high proton conductivity. However, Nafion membranes are expensive and suffer from high fuel penetration, which limits the efficiency and development of fuel cells. In order to promote the development and wide application of fuel cells, it is of great significance to prepare high-performance, economical and environmentally friendl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/333D06M15/03D06M13/123D04H1/4309D04H1/728D06M101/24
CPCD04H1/4309D04H1/728D06M13/123D06M15/03D06M15/333D06M2101/24
Inventor 江献财孙玉俊孟祥超彭水娇侯琳熙
Owner FUZHOU UNIV