CAJ | 학술논문

采用溶液涂覆-浸没相分离法对聚偏氟乙烯膜（PVDF）进行表面复合改性,制备了超疏水分离膜。初步考察了涂覆液中PVDF固含量和涂覆条件（浸泡时间、预蒸发时间、凝固浴组成和凝固浴温度）对复合膜疏水性能的影响。实验结果表明,当涂覆液中PVDF含量为1.88%（质量分数）时,膜丝有最大接触角136°;复合膜的接触角随浸泡时间的延长呈现先增大后减小的趋势,当浸泡时间为40s时,接触角最大,达到133°;在较短时间内（0～5s）,预蒸发时间对复合膜的接触角影响不大;复合膜的接触角随着凝固浴中DMAc含量的增加而逐渐减小,随着凝固浴温度的增大而增大,当凝固浴温度为65℃时,膜表面的接触角增至153°。
채용용액도복-침몰상분리법대취편불을희막（PVDF）진행표면복합개성,제비료초소수분리막。초보고찰료도복액중PVDF고함량화도복조건（침포시간、예증발시간、응고욕조성화응고욕온도）대복합막소수성능적영향。실험결과표명,당도복액중PVDF함량위1.88%（질량분수）시,막사유최대접촉각136°;복합막적접촉각수침포시간적연장정현선증대후감소적추세,당침포시간위40s시,접촉각최대,체도133°;재교단시간내（0～5s）,예증발시간대복합막적접촉각영향불대;복합막적접촉각수착응고욕중DMAc함량적증가이축점감소,수착응고욕온도적증대이증대,당응고욕온도위65℃시,막표면적접촉각증지153°。
The surface of polyvinylidene fluride （PVDF） hollow fiber membranes was modified by non-solvent induced phase separation and then obtained super-hydrophobic separation membranes. The influences of PVDF percentage composition in the coating solution and coating conditiongs （such as：soaking time, pre-evaporation time, coagulation bath composition and coagulation bath temperature） were researched. The results show that composite membranes had the largest contact angle that was 136 °when PVDF solid content is 1.88wt% in the coating solution; with the extension of soaking time,the contact angle of composite membrane at first increase and then decreased, when the soaking time is 40s,the contact angle reach to a maximum of 133%;in a relatively short period of time （0-5s）, the pre-evaporation time have little effect on the contact angle of composite mem- brane;contact angle of composite membrane decrease with DMAc concentration in the coagulation bath increase, but increase with the coagulation bath temperature increase,when the coagulation bath temperature is 65℃ ,the membrane surface contact angle increase to 153°.