High-performance polyimide hollow fiber membrane and preparation method and application thereof

A polyimide and fiber membrane technology, which is applied in the field of preparation of polyimide hollow fiber gas separation membranes, can solve the problems of fragility and breakage of membrane filaments, decrease in molecular weight, and difficulty in preparing membrane-forming components, so as to improve the resistance to Solvent properties and mechanical strength, the effect of mechanical strength enhancement
CN110404423AActive Publication Date: 2019-11-05DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Publication Date
2019-11-05

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Abstract

The invention provides a preparation method for a high-performance polyimide hollow fiber membrane. The hollow fiber membrane is prepared by using a dry-wet spinning technology, and the mechanical strength and the solvent resistance of the polyimide hollow fiber membrane are improved by using a high-temperature annealing method. When the annealing temperature is close to the glass-transition temperature, the annealing process can improve the tensile strength of the polyimide hollow fiber membrane, and when the annealing temperature is higher than the glass-transition temperature, the tensile strength and the solvent resistance of the polyimide hollow fiber membrane can be obviously improved. The method is simple and effective, and has a good application prospect in the aspect of gas separation.
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Description

technical field

[0001] The invention belongs to the field of gas separation, and in particular relates to a preparation method of a gas separation membrane, in particular to a preparation method and application of a polyimide hollow fiber gas separation membrane. Background technique

[0002] Gas separation membrane is a new type of gas separation technology that has developed very rapidly in recent decades. It has very successful applications in hydrogen recovery, natural gas purification, organic vapor recovery, air separation and other fields.

[0003] There are many kinds of polymer membrane materials, such as cellulose acetate, polysulfone, polyphenylene oxide, polyamide, polyimide and so on. Polyimide is a class of chemical-resistant, high-temperature-resistant, high-strength and high-performance materials. Aromatic polyimide material has rich benzene ring structure, strong polymer chain rigidity, and good gas separation performance. Gas separation membranes are gene...

Claims

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