Polyvinyl alcohol-bacterial cellulose sandwich structure type alkaline anion exchange membrane as well as preparation and application thereof

A technology of bacterial cellulose membrane and bacterial cellulose, applied in the field of polyvinyl alcohol/bacterial cellulose sandwich structure alkaline anion exchange composite membrane, can solve the problems of high cost and complicated preparation of alkaline anion exchange membrane, and achieve low cost , good CO2 electrochemical reduction performance and zinc-air battery charge and discharge performance, and the green effect of the preparation method

Pending Publication Date: 2021-03-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is: the technical problem of complex and expensive preparation of the existing basic anion exchange membrane

Method used

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  • Polyvinyl alcohol-bacterial cellulose sandwich structure type alkaline anion exchange membrane as well as preparation and application thereof
  • Polyvinyl alcohol-bacterial cellulose sandwich structure type alkaline anion exchange membrane as well as preparation and application thereof
  • Polyvinyl alcohol-bacterial cellulose sandwich structure type alkaline anion exchange membrane as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of preparation method of basic anion exchange composite membrane of PVA-BC sandwich structure formula:

[0033] Step 1: Dissolve 5g of glucose, 0.5g of tryptone and 0.3g of yeast extract powder in 100mL of deionized water and stir to adjust the pH to 5.0-6.0 and evenly seal and distribute them in 5 petri dishes, then heat at 115°C Autoclave for 30 minutes, inoculate 1 mL of bacterial solution (number DHU-ATCC-1) into each petri dish (in the sterilization station), seal it again and place it in a constant temperature incubator at 30°C for constant temperature cultivation until the medium is completely absorbed , put it into 1wt.% NaOH solution for 2 days for purification to remove attached bacteria and excess nutrient solution to obtain BC film;

[0034]Step 2: Dissolve hydroxyl-containing PVA with a molecular weight LW of 89,000-98,000 in deionized water, stir at 80-95°C until a uniform and transparent solution is obtained, and dissolve the water-soluble polymer ...

Embodiment 2

[0039] A kind of preparation method of basic anion exchange composite membrane of PVA-BC sandwich structure formula:

[0040] Step 1: Dissolve 5g of glucose, 0.5g of tryptone and 0.3g of yeast extract powder in 100mL of deionized water and stir to adjust the pH to 5.0-6.0 and evenly seal and distribute them in 5 petri dishes, then heat at 115°C Autoclave for 30 minutes, inoculate 1 mL of bacterial solution (number DHU-ATCC-1) into each petri dish (in the sterilization station), seal it again and place it in a constant temperature incubator at 30°C for constant temperature cultivation until the medium is completely absorbed , put it into 1wt.% NaOH solution for 2 days for purification to remove attached bacteria and excess nutrient solution to obtain BC film;

[0041] Step 2: Dissolve hydroxyl-containing PVA with a molecular weight of 146,000-186,000 in deionized water, and stir at 80-95°C until a uniform and transparent solution is obtained, and the water-soluble polymer conta...

Embodiment 3

[0046] A kind of preparation method of basic anion exchange composite membrane of PVA-BC sandwich structure formula:

[0047] Step 1: Dissolve 5g of glucose, 0.5g of tryptone and 0.3g of yeast extract powder in 100mL of deionized water and stir to adjust the pH to 5.0-6.0 and evenly seal and distribute them in 5 petri dishes, then heat at 115°C Autoclave for 30 minutes, inoculate 1 mL of bacterial solution (number DHU-ATCC-1) into each petri dish (in the sterilization station), seal it again and place it in a constant temperature incubator at 30°C for constant temperature cultivation until the medium is completely absorbed , put it into 1wt.% NaOH solution for 2 days for purification to remove attached bacteria and excess nutrient solution to obtain BC film;

[0048] Step 2: Dissolve hydroxyl-containing PVA with a molecular weight HW of 205,000 in deionized water, stir at 80-95°C until a uniform and transparent solution is obtained, and chlorinate the water-soluble polymer con...

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Abstract

The invention discloses a polyvinyl alcohol bacterial cellulose sandwich structure type alkaline anion exchange membrane as well as preparation and application thereof in an electrochemical energy device. The alkaline anion exchange membrane comprises hydroxyl-containing polyvinyl alcohol, a bacterial cellulose membrane and a quaternary ammonium group-containing water-soluble polymer. The preparation method comprises the following steps: dissolving hydroxyl-containing polyvinyl alcohol in deionized water to obtain a solution A; adding a water-soluble polymer solution containing a quaternary ammonium group into the solution A to obtain a solution B; equivalently pouring the solution B on two sides of a bacterial cellulose membrane in a plastic culture dish, and naturally drying to form a membrane, so as to obtain a polyvinyl alcohol-bacterial cellulose sandwich structure type polymer composite membrane; and taking out the polymer composite membrane from the culture dish, carrying out physical and chemical crosslinking treatment, and soaking in a KOH solution. The PVA-BC sandwich structure type alkaline anion exchange composite membrane provided by the invention is good in conductivity, simple in process, green, environment-friendly, low in cost and easy for electrochemical application.

Description

technical field [0001] The present invention relates to a CO 2 Preparation and application of electrocatalytic conversion and alkaline anion exchange membrane of zinc-air battery, especially related to a polyvinyl alcohol / bacterial cellulose (PVA-BC) sandwich structure alkaline anion exchange composite membrane, preparation and application. Background technique [0002] Due to the accelerated industrialization process in recent years, the energy resources led by fossil fuels have been drastically reduced and a large amount of CO has been generated thereby. 2 , thus causing various environmental crises (such as global warming, ocean acidification and desertification, etc.) and energy crises (decrease of non-renewable resources) [Journal of Applied Electr ° chemistry, 35 (2005) 955-965, International Journal of Artificial Organs, 42(2019) 386-474]. To solve the environmental crisis, reduce CO 2 emissions, people are committed to replacing fossil fuels by developing new ener...

Claims

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Application Information

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IPC IPC(8): H01M8/1041H01M8/1067H01M8/1069H01M12/06C25B1/50
CPCC25B1/00H01M8/1041H01M8/1067H01M8/1069H01M12/06Y02E60/50
Inventor 乔锦丽郭晓晶洪枫高璐诌倩倩徐能能王永霞
Owner DONGHUA UNIV
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