Thermoplastic polyimide microporous material and its preparation process

Abstract

This invention is related to the manufacturing technologic field of a micropore polymeric material, esecilly related to a thermoplastic polyimide micropore material and its preparation technology. Its raw materials and their percentage contents are as belows: thermoplastic polyimid(TPI): 70%-95%; pore former: 5%-30%. The micropore material is prepared by sintering humid mixed powder of polyimide and solid pore former. Its technological process is simple and it costs little. Multi-stage thermostatic sintering makes the mixed powder decompose completely and blend well with the polyimide particles. This improves material's strength and the factor of porosity. Micropore material's property can be adjusted by controlling the contend of the pore former, so it is very easy to adjust the bore diameter and the factor of porosity.

Description

technical field

[0001] The invention relates to the technical field of preparation of microporous polymer materials. In particular, it relates to a thermoplastic polyimide microporous material and a preparation process thereof. Background technique

[0002] Since the preparation of nylon microporous materials by the Massachusetts Institute of Technology in 1959, microporous materials have developed rapidly, and their interior has a special microporous structure. Among them, microporous polyimide materials are mostly used in aerospace, heat preservation, heat insulation, precision machinery and other fields due to their thermal stability, good mechanical properties, anti-friction and wear resistance and other properties. Foreign countries began to develop microporous polyimide materials in the 1970s. Microporous materials developed rapidly in the 1980s, and the United States successfully applied the materials to high-tech systems such as satellites and aircraft inertial nav...

Images