摘要
对熔融纺丝-冷却拉伸与热致相分离两种制备微孔聚丙烯中空纤维膜的意义、原理、过程、影响因素等进行了评述。
Polypropylene hollow fibrous membrane modules promise more rapid mass transfer than was commonly possible in conventional equipment. Microporous polypropylene hollow fibrous membranes may be prepared by the melt spinning and cold stretching (MSCS) or thermally induced phase separation (TIPS) method. In the MSCS process, a pure polypropylene melt was spun, and the micropores were formed by the mechanical force acting on the membranes in a subsequent cold stretching step. In the TIPS process, the sample was comprised of polypropylene and diluent, which formed a homogeneous melt above its melting temperature. Then it undergoed solid liquid or liquid liquid phase separation upon cooling. The sites occupied by the diluent become micropores after removal of the diluent. Factors affecting the MSCS membrane structure were melt draw ratio, spinning temperature, and annealing temperature. Factors affecting the TIPS membrane structure were polypropylene diluent interactions, the thermal history, polypropylene concentration, cooling rate, and the addition of nucleating agent.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1997年第4期8-13,共6页
Polymer Materials Science & Engineering
关键词
微孔膜
纺丝
膜分离
中空纤维膜
聚丙烯纤维
microporous membrane, membrane manufacture, melt spinning and cold stretching, thermally induced phase separation, solid liquid phase separation, liquid liquid phase separation