Polyethersulfone hollow fiber intelligent membrane with pH sensitivity as well as preparation method and application thereof

Abstract

The invention relates to a polyether sulphone hollow intelligent fibrous membrane with pH sensitivity, a method for preparing the same and application of the fibrous membrane. The method is characterized in that 8 to 24 weight portions of acrylonitrile, 5 to 18 weight portions of crylic acid, 70 to 85 weight portions of a solvent and 0.1 to 0.5 weight portion of an evocating agent are added into a reaction kettle with a stirrer, a thermometer and a condenser; under stirring, the mixture reacts for 8 to 24 hours at a temperature of between 55 and 70 DEG C to obtain an acrylonitrile-crylic acid copolymer solution; and 10 to 28 weight portions of polyether sulphone, 70 to 85 weight portions of a solvent and 1.5 to 6 weight portions of an additive are put into a vessel and dissolved for 2 to 24 hours at a temperature of between 75 and 95 DEG C under stirring to prepare a polyether sulphone solution, and 0.2 to 0.6 weight portion of the synthetic copolymer polyether sulphone solution is added into the prepared polyether sulphone solution; and the mixed solution is mixed for 2 to 24 hours at a temperature of between 55 and 65 DEG C under stirring. The mixed solution is subjected to filtering and defoaming and is positioned for curing to prepare a polyether sulphone spinning solution. The polyether sulphone spinning solution is spun to prepare the intelligent type hollow fibrous membrane with pH sensitivity by dry spraying-wet spinning technology; and the membrane has different screening coefficient and flux on acidic amino acid and basic amino acid, thereby being applied to separation of amino acid.

Description

technical field [0001] The invention relates to a polyethersulfone hollow fiber membrane with pH sensitivity and its preparation method and application, belonging to the field of special functional polymer materials. Background technique [0002] Polyethersulfone (PES for short) is a special engineering plastic that was first successfully developed and commercialized by the British ICI company in 1972. Its brand name is "Victrex PES". PES special engineering plastic, because of its high glass transition temperature and good physical and chemical stability, is an excellent special polymer material for engineering, but it is made into an intelligent hollow fiber membrane with pH sensitivity and applied to the separation of amino acids. There is no research report and product coming out so far. [0003] The separation and purification methods of amino acids mainly include: precipitation method, ion exchange method, extraction method and membrane separation method. Membrane se...

AI Technical Summary

Problems solved by technology

These methods all use chemical grafting to obtain pH-sensitive membranes, the preparation methods and processes are complicated, and it is difficult to realize industrialization.