Fuel cells are a new type of energy technology that directly convert the chemical energy of fuels through electrochemical reactions. Converted into electrical energy and is not restricted by region or geographical conditions. What we are going to talk about today is a core component in this fuel cell, which is the eptfe proton exchange membrane.
The structures of perfluorosulfonic acid membranes are similar, with a hydrophobic fluorocarbon backbone and hydrophilic sulfonic acid side chains. A currently recognized working principle of membranes is that the microphase separation structure of the hydrophilic phase and the hydrophobic phase in the membrane causes the aggregation of hydrophilic clusters, thereby forming a proton transmission channel. Obviously, a humidified environment will directly affect the water absorption rate of the membrane, thereby directly affecting the effectiveness of the proton transmission channel.
Eptfe proton exchange membrane is a non-toxic, odorless and tasteless milky white highly crystalline polymer with a density of only 0. 90–“0. 91g/cm3. It is one of the lightest varieties of all plastics currently. 1. It is particularly stable to water, with a water absorption rate of only 0.01% and a molecular weight of about 80,000 to 150,000. It has good formability, but due to its large shrinkage (1% to 2.5%), thick-walled products are easy to For some parts with high dimensional accuracy, it is difficult to meet the requirements, and the surface gloss of the products is good.
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