Porous polyimide ink, preparation method thereof, and method for preparing porous polyimide through direct writing 3D printing

A polyimide and polyamic acid technology, which is applied in the field of 3D printing technology and the preparation of porous polymer materials, can solve the problems of difficult control of porous polyimide pores and difficulty in forming porous components.
CN111154336AActive Publication Date: 2020-05-15LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2020-05-15

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Abstract

The invention provides a porous polyimide ink, a preparation method thereof, and a method for preparing porous polyimide through direct writing 3D printing, and relates to the fields of 3D printing technologies and porous polymer material preparation. The porous polyimide ink comprises the following components: polyamic acid, an organic solvent and a pore-forming agent. The prepared porous polyimide ink is applied to direct writing 3D printing, an obtained printed product is excellent in formability and good in size stability, and porous polyimide obtained through thermal imidization and after-treatment is uniform in pore diameter, uniform in pore distribution and communicated in pore passage. The method for preparing the porous polyimide is combined with a 3D printing technology, the problems that pores of the porous polyimide prepared through a traditional sintering method are difficult to control, complex porous components are difficult to form and the like are solved, and the method is suitable for 3D printing and forming of porous oil-containing parts that work under extreme working conditions and special conditions.
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Description

technical field

[0001] The invention relates to the field of 3D printing technology and preparation of porous polymer materials, in particular to a porous polyimide ink and a preparation method thereof, and a method for preparing porous polyimide by direct writing 3D printing. Background technique

[0002] For parts working under extreme working conditions and special conditions, it is particularly necessary to reduce and control friction and wear. Polymer-based composites have become the focus of more and more researchers because of their low friction coefficient, good wear resistance, and excellent mechanical strength. Polyimide, as one of high molecular polymers, because of its excellent properties such as heat resistance, dimensional stability, flame retardancy, electrical insulation, mechanical properties and diversity of application forms such as powder, ink, Varnishes, adhesives, composite materials, etc., have attracted widespread attention and are used in modern cu...

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
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