高渗透性ZrO_(2)中空纤维陶瓷超滤膜的制备研究  

Preparation of highly permeable ZrO_(2) hollow fiber ultrafiltration ceramic membrane

作　　者：詹涛 张小珍 周俊 王少华 胡学兵 常启兵 ZHAN Tao;ZHANG Xiaozhen;ZHOU Jun;WANG Shaohua;HU Xuebing;CHANG Qibing(School of Materials Science and Engineering&Key Laboratory of Inorganic Membranes,Jingdezhen Ceramic University,Jingdezhen 333403,China)

机构地区：[1]景德镇陶瓷大学材料科学与工程学院江西省高校无机膜重点实验室,景德镇333403

出　　处：《膜科学与技术》2022年第1期41-49,共9页Membrane Science and Technology

基　　金：国家自然科学基金资助项目(52062022);江西省研究生创新基金项目(YC2019-S387)。

摘　　要：以采用相转化法制备的高渗透性中空纤维陶瓷微滤膜为支撑体,通过溶胶浸渍涂覆技术制备了小孔径ZrO_(2)陶瓷超滤膜.研究了支撑体预处理、溶胶组成、热处理温度、涂覆次数等因素对制备的ZrO_(2)超滤膜的微结构及性能的影响.结果表明,适量钇的引入可使ZrO_(2)形成稳定的立方萤石结构晶相,可避免膜层出现开裂.在优化的热处理温度、溶胶组成条件下,通过二次涂覆可在中空纤维膜支撑体表面制备出连续光滑、无缺陷的ZrO_(2)膜层,膜厚度和平均孔径分别为450 nm和12 nm,相应的陶瓷膜的纯水通量和抗弯强度分别可达到2020 L/(m^(2)·h·MPa)和97.1 MPa.ZrO_(2) ceramic ultrafiltration membranes with small pore size were prepared directly by the sol dip-coating technique,using highly permeable hollow fiber ceramic microfiltration membranes by phase inversion method as the support.The effects of the pretreatment of the support,sol composition,heat-treatment temperature,and coating times on the microstructure and properties of the prepared ZrO_(2) ultrafiltration membranes were investigated.The results showed that the introduction of an appropriate amount of yttrium could lead to the formation of ZrO_(2) crystalline phase with a stable cubic fluorite structure,which could avoid the cracking of the active membrane layer.Under the optimized conditions of heat treatment temperature and sol composition,a continuous and smooth ZrO_(2) membrane layer without any defects can be obtained on the hollow fiber support after twice coating.The formed ZrO_(2) layer shows a thickness of about 450 nm and mean pore size of 12 nm,and the corresponding pure water flux and flexural strength of the ceramic membrane could reach 2020 L/(m^(2)·h·MPa)and 97.1 MPa,respectively.

关 键 词：中空纤维陶瓷膜 支撑体 溶胶浸渍涂覆技术 超滤膜 氧化钇稳定氧化锆 

分 类 号：TQ174[化学工程—陶瓷工业]