论文部分内容阅读
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。
A novel cordierite hollow fiber ceramic membrane was prepared by one-step transformation by phase transformation and sintering. The microstructure, porosity and pore size distribution, bending strength, pure water flux and nitrogen permeability of the prepared hollow fiber membrane Structure and performance were characterized. The results show that the cordierite hollow fiber membrane is a porous asymmetric structure composed of an inner macroporous layer and an outer sponge porous layer. The cordierite hollow fiber membrane prepared at 1360 ℃ for 2h had a porosity of 39.2% and a flexural strength of 76.5MPa. The permeability of pure water and nitrogen at pressure of 0.10MPa reached 61.34m3 / (m2 · h · MPa) and 7824m3 / (m2 · h · MPa), respectively. Experiments show that the use of larger particle size of cheap industrial grade powder as raw material, can be prepared asymmetric hollow fiber ceramic microfiltration membrane.