有机膜的无机改性及其性能研究

以无机纳米氧化铝粒子作为无机添加剂与聚偏氟乙烯（PVDF）共混,采用相转换法合成了有机-无机共混超滤膜.通过测定膜与纯水的接触角,表征膜的亲水性;用激光共聚焦显微镜(CLSM)、扫描电镜（SEM）和透射电镜（TEM）观察了膜的表面结构、表面孔分布和断面孔的结构及纳米颗粒在膜中的分散情况;利用杯式超滤装置对改性膜的透过性能、截留性能以及抗污染性能进行了测试;用强度测定仪测定了膜强度.结果表明,纳米Al₂O₃ 的加入改善了PVDF膜的表面亲水性、通量、强度和抗污染性.

Research of Performances for the Organic Membrane Modified by Inorganic Material

Nano-sized alumina particles as inorganic additive were dispersed in the poly(vinylidene fluoride) uniformly to prepare organic-inorganic composite membranes.Contact angle between water and the membrane surface were measured by contact angle measurement in order to characterize the hydrophilicity changing of the membrane surface.The membrane surface structures,porous distribution on the membrane surface,the cross-sectional structures and nanometer particles distribution were examined by confocal laser scanning microscopy (CLSM),scanning electron microscopy (SEM) and transmission electron microscopy (TEM) respectively.Membrane properties were characterized by ultrafiltration (UF) experiments in terms of water flux and antifouling properties.Membranes mechanical performances were measured by omnipotence electronic intensity measuring instrument (W-56).Experiments indicate that Al₂O₃-PVDF composite membranes exhibit significant differences in surface hydrophilicity properties,flux,and intensity and antifouling performances due to nano-sized particles addition.