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Recovery method of sulfonated polyether ether ketone (SPEEK) / polyaniline (PANI) / propylene glycol monomethyl acetate (PMA) composite proton exchange membrane

A technology of proton exchange membrane and recovery method, which is applied in the field of recovery of SPEEK/PANI/PMA composite proton exchange membrane, which can solve the problem of lowering battery performance and fuel utilization rate, temperature and water content without mentioning composite proton exchange membrane recovery method Require high-level problems, achieve the effect of solving the problem of waste membrane treatment, simple equipment, and low raw material cost

Inactive Publication Date: 2012-12-26
NANTONG UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it still has some disadvantages: (1) It has high requirements on temperature and water content, and its best working temperature is 70°C to 90°C. If the temperature exceeds this temperature, its water content will drop sharply, and the proton conductivity will drop rapidly; ( 2) Poor selectivity to methanol and water, and poor alcohol resistance. More than 40% of methanol will pass through the membrane during use, which reduces battery performance and fuel utilization. It is not suitable for direct methanol fuel cells ( Direct methanol fuel cell, DMFC) PEM
[0011] The recovery of the above membranes does not mention the recovery method of the SPEEK / PANI / PMA composite proton exchange membrane

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Membrane pretreatment Take a waste membrane with a formula of 50% by mass of SPEEK solid with a sulfonation degree of 60%, 25% by mass of PANI powder, and 25% by mass of PMA particles. Soak the waste membrane in 1% hydrogen peroxide, heat it at 70°C~90°C for 60min, remove the organic matter on the membrane surface, wash the membrane surface with deionized water for 3~5 times, remove the residual hydrogen peroxide, and place the membrane in 0.5mol / L H 2 SO 4 in 70°C~90°C for 60 minutes; then boil 3 times with deionized water at 70°C~90°C for 30 minutes each time, and put the pretreated SPEEK / PANI / PMA composite proton exchange membrane scraps in an oven at 100°C Dry in medium.

[0028] (2) Preparation of membrane solution Cut the above-mentioned SPEEK / PANI / PMA composite proton exchange membrane into 1-methyl-2-pyrrolidone solution (or methylamine solution or dimethyl sulfoxide solution), and place it under magnetic heating and stirring Stir at room temperature for 2...

Embodiment 2

[0031] The formula ratio of step (1) is: SPEEK solid with a sulfonation degree of 60% is 60% by mass, PANI powder is 15% by mass, and PMA particles are 25% by mass; the rest are the same as in Example 1, the prepared proton exchange membrane The proton conductivity is 2×10 -2 S / cm , the methanol permeability is 1.8×10 -7 cm 2 / s, the loss rate of heteropoly acid was 2.7%.

Embodiment 3

[0033] The formula ratio of step (1) is: SPEEK solid with a sulfonation degree of 60% is 70% by mass, PANI powder is 10% by mass, and PMA particles are 20% by mass; the rest are the same as in Example 1, the prepared proton exchange membrane The proton conductivity is 2.4×10 -2 S / cm , the methanol permeability is 2.5×10 -7 cm 2 / s, the loss rate of heteropoly acid was 2.8%.

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PUM

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Abstract

The invention discloses a recovery method of a sulfonated polyether ether ketone (SPEEK) / polyaniline (PANI) / propylene glycol monomethyl acetate (PMA) composite proton exchange membrane. The composite proton exchange membrane is formed by composition of SPEEK with sulphonation degree of 50%-70%, PANI and PMA. The membrane is firstly pretreated. Then the membrane is dissolved into 1-methyl-2-pyrrolidone solutions to produce membrane solutions. Eventually, casting film forming is carried out to produce a recasting membrane, and the proton exchange membrane is formed. The recovery method has the advantages that a waste membrane or leftover materials of the SPEEK / PANI / PMA composite proton exchange membrane are used as the raw materials, sources of the raw materials are wide, raw material cost is low, the recovery preparation process and needed instruments are simple, manufacturing cost of the membrane is reduced, meanwhile, the problem of treatment of the waste membrane is solved, environmental pollution is avoided, and significant environmental functions are achieved.

Description

technical field [0001] The invention relates to a method for recovering a proton exchange membrane, in particular to a method for recovering a SPEEK / PANI / PMA composite proton exchange membrane. Background technique [0002] At present, the proton exchange membrane (PEM) is one of the core components of the proton exchange membrane fuel cell (PEMFC) and the direct alcohol fuel cell (including DMFC and DEFC), and its role is: ( 1) Separate the anode and cathode to prevent the direct mixing of fuel and air (oxygen) for chemical reactions; (2) conduct protons, the higher the proton conductivity, the smaller the internal resistance of the membrane, and the higher the efficiency of the fuel cell; (3) The insulator prevents the conduction of electrons in the membrane, and the electrons flow from the anode to the cathode through the external line to generate external current for people to use. Generally, PEM materials for fuel cells must meet the following requirements: (1) low cos...

Claims

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Application Information

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IPC IPC(8): C08J11/08C08J5/22C08L61/16C08L79/02
CPCY02W30/62
Inventor 倪红军马骏黄明宇廖萍苏冬云汪兴兴万晓峰钱双庆
Owner NANTONG UNIVERSITY
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