CAJ | 학술논문

采用静电纺丝法制备了磷钼酸/聚苯乙烯( PS)/聚乙烯醇( PVA)复合纤维,并将其模压成膜。利用红外光谱( IR)、扫描电子显微镜( SEM)及X射线能谱( EDX)等对复合纤维及其膜的结构与形貌进行表征,并对复合纤维膜的光催化性能、力学性能及在水中稳定性进行测试。结果表明,在复合纤维中磷钼酸的Keggin结构得到保持。 PS与PVA质量比为1：1时,复合纤维形貌最佳,表面光滑,直径较小且分布均匀,复合纤维的直径随着磷钼酸含量的增加而减小。将磷钼酸固载于复合纤维膜上比直接使用具有更高的光催化活性,光照25 min后接近98%的甲基橙降解；复合纤维膜易于回收再利用,5次重复使用后,复合纤维膜没有破损,磷钼酸损失较少,光催化性能无明显下降。复合纤维膜的强度随磷钼酸含量的增加先增大后减小,韧性随PVA含量的增加而增大,随磷钼酸含量的增加而减小。
채용정전방사법제비료린목산/취분을희( PS)/취을희순( PVA)복합섬유,병장기모압성막。이용홍외광보( IR)、소묘전자현미경( SEM)급X사선능보( EDX)등대복합섬유급기막적결구여형모진행표정,병대복합섬유막적광최화성능、역학성능급재수중은정성진행측시。결과표명,재복합섬유중린목산적Keggin결구득도보지。 PS여PVA질량비위1：1시,복합섬유형모최가,표면광활,직경교소차분포균균,복합섬유적직경수착린목산함량적증가이감소。장린목산고재우복합섬유막상비직접사용구유경고적광최화활성,광조25 min후접근98%적갑기등강해；복합섬유막역우회수재이용,5차중복사용후,복합섬유막몰유파손,린목산손실교소,광최화성능무명현하강。복합섬유막적강도수린목산함량적증가선증대후감소,인성수PVA함량적증가이증대,수린목산함량적증가이감소。
POMs ( phosphomolybdic acid )/PS ( polystyrene )/PVA ( polyvinyl alcohol ) composite fibers were prepared by electrospinning, which were molded into a membrane. The structure and morphology of the com-posite fibers were characterized, by infrared ( IR ) spectroscopy, scanning electron microscopy ( SEM ) and energy dispersive X-ray( EDX) spectroscopy. The photocatalytic performance and mechanical properties of the composite fibers membranes were also tested. The results show that the Keggin structure of POMs in the com-posite fiber was not destroyed. When the mass ratio of PS and PVA was 1:1, the composite fibers got the best morphology, smooth surface and smaller diameter along with uniform distribution. The diameter of composite fibers decreased with the increase of POMs content. UV test showed that the POMs immobilized on composite fiber membranes displayed higher photocatalytic activity than that of the direct use. Around 98% of methyl orange was degraded after 25 min irradiation. The composite fiber membrane was easy to recycle and reuse. After using 5 times repeatedly, the photocatalytic activity of the composite fiber membranes was not significant-ly reduced. The composite fiber membranes were very few breakages. The composite fiber membranes strength increased first and then decreased with the POMs content increased. The toughness increased with the increase of PVA content but the toughness decreased with the increasing of the POMs content.