Method for preparing block copolymer proton exchange membrane through controlling over free radical polymerization under existence of DPE

A technology of block copolymer and proton exchange membrane, applied in the field of preparation of proton exchange membrane, can solve the problems of molecular design and structural regulation limitation of proton exchange membrane, achieve green polymerization system, improve proton conductivity and monomer conversion rate high effect

Inactive Publication Date: 2013-06-26
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above existing methods for preparing proton exchange membranes have certain limitations in terms of molecular design and structural regulation.

Method used

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  • Method for preparing block copolymer proton exchange membrane through controlling over free radical polymerization under existence of DPE
  • Method for preparing block copolymer proton exchange membrane through controlling over free radical polymerization under existence of DPE
  • Method for preparing block copolymer proton exchange membrane through controlling over free radical polymerization under existence of DPE

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Controlled free radical polymerization in the presence of DPE to prepare block copolymer proton exchange membrane, using sodium dodecylbenzenesulfonate as surfactant

[0032]30g of sodium dodecylbenzenesulfonate aqueous solution with a mass fraction of 0.25% was added to a 150ml three-necked flask equipped with an electric stirrer and a condenser, and 8g of methyl methacrylate and 0.12g of 1,1-diphenyl Add ethylene into the above-mentioned three-necked flask, and pre-emulsify under 300r / min mechanical stirring. After 30 minutes, put the three-neck flask in an 80°C water bath, and after equilibrating for 10 minutes, add 10 g of potassium persulfate aqueous solution with a mass fraction of 14% to the emulsion system, continue the reaction for 6 hours, and then cool to room temperature to obtain seeds containing macromolecular precursors latex. Using a dropping funnel, 5 g of styrene and 10 g of 0.3% sodium dodecylbenzenesulfonate aqueous solution were added dr...

Embodiment 2

[0034] Example 2: Controlled free radical polymerization in the presence of DPE to prepare block copolymer proton exchange membrane, using sodium dodecylsulfonate as surfactant

[0035] Add 30 g of sodium dodecylsulfonate aqueous solution with a mass fraction of 0.3% into a 150 ml three-necked flask equipped with an electric stirrer and a condenser, mix 8 g of methyl methacrylate and 0.2 g of 1,1-diphenylethylene Add it into the above-mentioned three-necked flask, and pre-emulsify under 300r / min mechanical stirring. After 30 minutes, put the three-neck flask in an 80°C water bath, and after equilibrating for 10 minutes, add 10 g of potassium persulfate aqueous solution with a mass fraction of 18% to the emulsion system, continue the reaction for 6 hours, and then cool to room temperature to obtain seeds containing macromolecular precursors latex. Using a dropping funnel, 5 g of styrene and 10 g of 0.3% sodium dodecylsulfonate aqueous solution were added dropwise at the same t...

Embodiment 3

[0037] Example 3: Controlled free radical polymerization in the presence of DPE to prepare block copolymer proton exchange membrane, the sulfonation time is 130min

[0038] Add 30 g of sodium dodecylsulfonate aqueous solution with a mass fraction of 0.3% into a 150 ml three-necked flask equipped with an electric stirrer and a condenser, mix 8 g of methyl methacrylate and 0.2 g of 1,1-diphenylethylene Add it into the above-mentioned three-necked flask, and pre-emulsify under 300r / min mechanical stirring. After 30 minutes, put the three-neck flask in an 80°C water bath, and after equilibrating for 10 minutes, add 10 g of potassium persulfate aqueous solution with a mass fraction of 18% to the emulsion system, continue the reaction for 6 hours, and then cool to room temperature to obtain seeds containing macromolecular precursors latex. Using a dropping funnel, 5 g of styrene and 10 g of 0.3% sodium dodecylsulfonate aqueous solution were added dropwise at the same time. Under me...

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Abstract

The invention relates to a method for preparing a block copolymer proton exchange membrane through the controlling over free radical polymerization under the existence of DPE. The invention has technical characteristics that: a macroinitiator precursor seed latex with a semiquinone structure is prepared in an emulsion system; a second monomer is swelled in the seed latex; the block copolymer is sulfonated by using heparan sulfate; a series of sulfonated block copolymer membrane is prepared by using a solution casting method; and the block copolymer proton exchange membrane is prepared through an annealing treatment. According to the invention, the preparation method and process are simple; the polymerization system is green and environment-friendly; monomer conversion rate is high; high-molecular weight block copolymer can be prepared within a relatively short period of time; block copolymer composition and structure can be effectively controlled; micro-phase separation morphology in proton exchange membrane can be controlled at a molecular level; and proton conductivity can be improved.

Description

technical field [0001] The invention relates to a method for preparing a proton exchange membrane for a fuel cell, in particular to preparing a series of block copolymers by using a DPE controlled free radical polymerization method in a full emulsion system, and sulfonating them to prepare a proton exchange membrane. This method can improve the proton conductivity of the proton exchange membrane by adjusting the microphase separation morphology of the proton exchange membrane. Background technique [0002] At present, air pollution, global warming, and increasing dependence on fossil fuels are major issues that countries around the world need to address urgently. As a clean, efficient and safe green new energy, fuel cells have shown broad and attractive market development prospects. Compared with other fuel cells, the proton exchange membrane fuel cell (PEMFC) has the advantages of high power density, high working current density, low working temperature, and fast start-up ...

Claims

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Application Information

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IPC IPC(8): C08J5/22C08L33/12C08L33/08C08F293/00C08F220/14C08F220/18C08F212/08C08F2/38C08F8/36
Inventor 张秋禹王雯雯张和鹏顾军渭周艳阳刘梦姣
Owner NORTHWESTERN POLYTECHNICAL UNIV
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