PPS diaphragm, also known as PPS fabric diaphragm, is a diaphragm cloth made of PPS fibers through processes such as machine weaving and water splitting. As a high-performance special engineering plastic, it can maintain stable performance under alkaline and high temperature conditions, and is therefore used to prepare alkaline hydrogen production membranes. Surface treatment of PPS diaphragm to improve its hydrophilicity, such as coating with ceramic coatings such as zirconia on the basis of PPS cloth.