中文摘要：

制备了聚偏氟乙烯（PVDF）接枝N-异丙基丙烯酰胺（NIPAAm）共聚物（PVDF-g-PNIPAAm）,进而采用干-湿法纺丝工艺,首次纺制出温敏PVDF-g-PNIPAAm中空纤维膜。通过红外光谱（FT-IR）、X射线衍射（XRD）、差示扫描量热仪（DSC）、扫描电镜（SEM）等对中空纤维膜的结构和形态进行了表征与研究。研究结果表明,和PVDF中空纤维膜相比,PVDF-g-PNIPAAm中空纤维膜具有相同的晶型结构,但结晶度明显降低,导致熔融峰值温度降低;由于亲水性的增加,PVDF-g-PNIPAAm接枝共聚物纤维膜形成较大的指状孔结构和粗糙的内外表面,且具有较高的孔隙率。

英文摘要：

A poly（vinylidene fluoride）-graft-poly（N-isopropylacrylamide）（PVDF-g-PNIPAAm） copolymer was synthesized,and from which a novel temperature-sensitive copolymer hollow fiber membrane was prepared based on the technique of dry-wet spinning.The structures of the hollow fiber membrane were characterized by Fourier transform infrared spectroscopy（FT-IR）,X-ray diffraction（XRD）,differential scanning calorimetry（DSC）,scanning electron microscope（SEM）,respectively.The results showed that the PVDF-g-PNIPAAm hollow fiber membrane possessed the same microcrystalline structure as the PVDF membrane,while the degree of crystallinity of PVDF-g-PNIPAAm hollow fiber membrane decreased remarkably,which resulted in the lower melting temperature.Larger finger-like structures were formed in the cross-sections of PVDF-g-PNIPAAm fiber membrane with a higher porosity for the improvement of hydrophilicity.