Production and properties of hollow fibres based on polyamide-imide

Production of hollow fibres is a promising technology for creating membrane materials with controllable properties. The major factors affecting the structure of hollow fibre are viscosity of the polymer solution, its concentration, and conditions of its casting and post-treatment. The viscosity of the spinning solution is shown to have an effect on the formation of porous structure and its evolution in the post-treatment process. The obtained polyamide-imide based fibres exhibited gas-separating properties at the level of their commercial analogs.