HOLLOW FIBER, SPINNING SOLUTION COMPOSITION FOR OBTAINING HOLLOW FIBER, AND METHOD OF PRODUCING HOLLOW FIBER WITH ITS APPLICATION Russian patent published in 2012 - IPC D01D5/24 D01D5/247 D01F6/74 C08L79/08 C08G73/10 C08G73/22 B01D71/64 B01D53/22 

FIELD: textiles, paper.

SUBSTANCE: invention relates to hollow fiber comprising a cavity located in the center of the hollow fiber, macropores located near the cavity, and mesopores and picopores located near macropores, and picopores are connected to each other in three dimensional space to form a three-dimensional net structure, and hollow fiber comprises polymer derived from polyimide, and polyimide comprises repeating structural unit derived from aromatic diamine comprising at least one functional group comprising OH, SH or NH₂, which is in the ortho position in relation to the amino group, and dianhydride. Also the spinning solution composition for obtaining the above mentioned hollow fiber and method of producing the hollow fiber is described.

EFFECT: creation of hollow fibers having improved gas permeability and selectivity in relation to gases, creation of new membranes for separation of gases based on these materials.

48 cl, 18 ex, 1 tbl, 9 dwg