作　　者： ; ;

机构地区： 景德镇陶瓷学院

出　　处： 《硅酸盐学报》 2010年第2期342-346,共5页

摘　　要： 采用相转化和烧结法,通过一步成型制备了新颖的堇青石中空纤维陶瓷膜,并对制备的中空纤维膜微观结构、孔隙率和孔径分布、抗弯强度、纯净水通量和氮气渗透性等结构与性能进行了表征。结果表明:堇青石中空纤维膜为多孔非对称结构,由内部大孔层和外部海绵状多孔层组成。在1360℃保温2h制备的堇青石中空纤维膜孔隙率为39.2%,抗弯强度为76.5MPa。0.10MPa压差下的纯净水和氮气渗透性分别达到61.34m3/(m2·h·MPa)和7824m3/(m2·h·MPa)。实验证明,采用较大粒径的廉价工业级粉体为原料,可制备非对称的中空纤维陶瓷微滤膜。 Novel cordierite hollow fiber membranes were prepared in one step by a combined phase inversion and sintering technique,based on a dry/wet spinning process.The cordierite hollow fiber membranes were characterized in terms of microstructure,porosity and pore size distribution,bending strength,pure water flux and nitrogen permeability.The results demonstrate that the hollow fiber membrane has porous and asymmetric structure including inner macro-void structure and outer sponge-like structure.The membrane sintered at 1 360 ℃ for 2 h has a total porosity of 39.2%,a bending strength of 76.5 MPa,a pure water flux of 61.34 m3/（m2·h·MPa） and a nitrogen permeability of 7 824 m3/（m2·h·MPa） under a trans-membrane pressure difference of 0.10 MPa.This work confirms that the highly asymmetric ceramic hollow fiber membrane for microfiltration can be prepared in one step using low cost industrial grade powders with relatively large particle size.

关 键 词： 堇青石 中空纤维 非对称膜 相转化法 表征

领　　域： [化学工程] [化学工程]