作　　者： ; ; ; ;

机构地区： 景德镇陶瓷学院

出　　处： 《中国陶瓷》 2013年第8期17-21,25,共6页

摘　　要： 为获得特定的分离膜表面,在陶瓷膜的膜孔道表面制备了纳米涂层。纳米涂层厚度导致陶瓷膜的孔径减小,根据Hagen-Poiseuille方程,渗透通量应减少,但纳米涂层修饰陶瓷膜反而增加。为认识这种特殊的水渗透现象,借助"边界滑移"理论,从纳米涂层的表面形貌、纳米效应以及亲憎水性的角度解释纳米修饰陶瓷膜的渗透机理,并通过实验验证了渗透机理的前提条件。 The microfiltration membrane was modified with nano-sized metal oxide coating to obtain the hydrolysis surface. The nano coating distributes in the surface of the microfiltration membrane and on the wall of the permeating channels in the microfiltration membrane. The thickness of the nano-sized coating results in the decrease of the mean pore size of the modified microfiltration membrane. According to Hagen-Poiseuille equation, the permeating flux should decrease. However, the permeating flux of the modified membrane increases. To explain this phenomenon, the water permeating mechanism of the modified membrane was discussed from the point of the surface morphology of nano coating, the nano-sized effect and the hydrophilic/hydrophobic character. The requirements of this mechanism were tested by the experiments.

关 键 词： 纳米涂层 修饰微滤膜 渗透 边界滑移

领　　域： [一般工业技术]