Preparation method of polyimide porous film

A polyimide and porous film technology, which is applied in the field of preparation of polyimide porous films, can solve the problems of uneven distribution, difficult control of pore size, etc., and achieves simple preparation process, uniform and orderly distribution of pores, and controllable pore size. Effect
CN102417604AInactive Publication Date: 2012-04-18LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
8 Cites 26 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2012-04-18
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
Patent Text Reader

Abstract

The invention discloses a preparation method of a polyimide porous film. According to the invention, silica colloid ball is used as a template; uniformly dispersed polyamide acids (PAA) / SiO2 colloidal solution is dried to obtain a PAA / SiO2 composite film with an ordered structure; the composite film is treated with thermal imidization, etched by a hydrofluoric acid solution to remove the SiO2 colloid ball, washed and dried in vacuum to obtain the polyimide porous film with an ordered structure. The invention is simply operated, at low cost and easy for industrialized production; the prepared polyimide porous material has advantages of ordered structure, ordered aperture, large strength and heat resistance, etc.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a preparation method of a polyimide porous film, in particular to a preparation method of a polyimide porous film with an ordered structure and controllable pore size. Background technique

[0002] Polyimide porous material, in addition to the superior mechanical properties, dimensional stability, and solvent resistance of polyimide materials, the introduction of pores makes it have the characteristics of small density, large specific surface area, and high specific mechanical properties of porous materials. , good damping performance, etc., and for polyimide porous materials with ordered nanostructures, it can be endowed with optical, electrical, magnetic and other functionalities at the same time. Therefore, polyimide porous materials have broad application prospects in the fields of catalysis, separation and purification, biological tissue repair, optoelectronic devices, and tribology. Especially in the application of micro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More