膜科学与技术

a-Al2O3中空纤维支撑体的制备与表征

作者：徐吉上，何勇，顾学红，金万勤

单位：南京工业大学化学化工学院, 材料化学工程国家重点实验室,

关键词：干-湿法纺丝; ?-Al2O3; 中空纤维支撑体; NaA; 分子筛膜

出版年,卷(期):页码： 2011,31(2):19-23

摘要：

采用干-湿法纺丝技术制备了?-Al2O3中空纤维支撑体, 系统研究了Al2O3/PESf(聚醚砜)原料比、焙烧温度、保温时间以及原料粒径等因素对支撑体结构性能的影响. 优化的支撑体渗透性为4.09×10-5 mol•s-1•m-2•Pa-1, 弯曲强度为142.7 MPa, 最大孔径与平均孔径分别为0.66 μm和0.56 μm. 在该支撑体上合成了NaA分子筛膜, 其水/乙醇分离因子>5000, 通量达7.37 kg•m-2 •h-1.

a-Al2O3 hollow fiber supports were prepared by dry-wet spinning process. Effects of Al2O3/PESf(polyethersulfone) ratio, sintering temperature, holding time and particle size of raw material on structure and performances of supports were studied systematically. The optimized hollow fiber support had the permeance of 4.09×10-5 mol•s-1•m-2•Pa-1, bending strength of 142.7 MPa, maximum pore diameter of 0.66 μm and average pore diameter of 0.56 μm. The NaA zeolite membrane was synthesized on the optimized support, which showed the separation factor of water/ethanol of >5000 and the flux up to 7.37 kg•m-2 •h-1.

徐吉上(1984-), 男, 江苏徐州人, 在读硕士, 从事膜材料制备与分离. *通讯联系人

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