公开(公告)号：US6017474A

公开(公告)日：2000-01-25

申请号：US100013

申请日：1998-06-19

申请人： Wah Koon Teo ,  Kang Li ,  Dongliang Wang

发明人： Wah Koon Teo ,  Kang Li ,  Dongliang Wang

IPC分类号： D01D5/24 ,  D01D5/247 ,  D01F6/66

CPC分类号： D01F6/66 ,  D01D5/24 ,  D01D5/247

摘要： Formulation polymer dopes and development of processes for preparing asymmetric polyethersulfone hollow fiber membranes for gas separation are provided. Polyethersulfone hollow fiber membranes which exhibit improved gas permeability and selectivity have been produced from a formulated polymer dope containing N-methyl-2-pyrrolidone (NMP) and suitable nonsolvent-additives (NSA). The nonsolvent-additives are water and the mixture of ethanol and water. The dopes were tailored to be close to the point of phase separation, and have moderate polymer concentration with moderate viscosity. The hollow fibers were spun by the dry-wet phase inversion processes using water as both the internal and external coagulant. The dried hollow fibers are then coated with silicone rubber, a highly permeable material and the coated hollow fiber membranes exhibit excellent permeability and selectivity compared to those of the state-of-the-art polyethersulfone membranes.

摘要翻译： 提供了制备聚合物涂料和开发用于制备用于气体分离的不对称聚醚砜中空纤维膜的方法。 已经由含有N-甲基-2-吡咯烷酮（NMP）和合适的非溶剂 - 添加剂（NSA）的配制的聚合物涂料制备了具有改善的气体渗透性和选择性的聚醚砜中空纤维膜。 非溶剂 - 添加剂是水和乙醇和水的混合物。 这些涂料被定制为接近相分离点，并且具有中等粘度的中等聚合物浓度。 通过使用水作为内部和外部凝结剂的干 - 湿相转化方法将中空纤维纺丝。 然后用干燥的中空纤维涂覆硅橡胶，高度可渗透的材料，并且与现有技术的聚醚砜膜相比，涂覆的中空纤维膜表现出优异的渗透性和选择性。