The Study On Modification And Applications Of Polyperfluorosulfonic Proton Exchange Membranes

Perfluorosulfonic proton exchange membrane is one kind of ion-exchange membranes which has high selectivity. Due to the outstanding performance such as resistance to oxidation, mechanical strength, thermal stability, low resistance, electrochemistry performance and high selectivity,it is not only applied to ion exchange membrane fuel cell, but also widely used in electrolytic sodium chloride, preparation of hydrogen by electrolysis of water, electric adsorption desalination and sewage treatment. Therefore, the research on the development and modification of proton exchange membrane, as well as the discussion of its application value is especially important, and has the extremely vital significance.In this paper, the perfluorosulfonic proton exchange membrane which used domestic pfsa resin was prepared by the molding process of flow delay. Different mesh of PTFE were used to enhance the compound sulfonic acid membrane. The bumpy phenomenon of membrane surface caused by the water Swelling was avoided, and the influence of the electrolysis of polar distances in application processes was effectively prevented.The membrane prepared with the reclaimed perfluorosulfonic acid resin solution was beneficial to economize the material and decline the cost.In this paper, the perfluorosulfonate ion exchange membrane was modified by carbon aerogel of Phenol formaldehyde system. The parameters affecting the modification membrane were studied systematically, and the modification membrane used in electrosorb technology has been proposed. The results indicated that the optimum carbon aerogel to be used for modification was the particle size of 9.76nm, the specific surface area of 590m2/g and the carbon aerogel content of 2%,under these conditions, the modification membrane's performance was outstanding and would satisfy the application for the electrosorb technology.In this paper, a self-made sulfonic acid ionic membrane as the core assemble of the electrolysis of water reactor, with platinum content for 40 percent of carbon membrane catalyst platinum as carrying. Through optimization of the preparation methods of MEA and the substitutability of catalyst, the electrolysis of hydrogen temperature, current density, produce hydrogen rate when application in the electrolysis of water hydrogen were examined. The influence of different preparation methods of MEA on the hydrogen production rate and electrolytic efficiency were analysed and compared. The results indicated that the performance of MEA which obtained by flow delay molding process using mixed evenly resin catalyst and mixed solution on the base of the pure PEM is better, such as the production of hydrogen efficiency and cost reduction.