膜科学与技术

疏水α-Al2O3陶瓷膜特性表征及温差驱动能力研究

作者：王海博，郭枭，史志国，田瑞

单位： 1. 内蒙古工业大学土木工程学院，呼和浩特 010051；2. 兰州理工大学能源与动力工程学院，兰州 730050；3. 内蒙古工业大学机械工程学院，呼和浩特 010051；4. 内蒙古工业大学能源与动力工程学院，呼和浩特 010051

关键词：疏水陶瓷膜；特性表征；温差；驱动能力；截留率

DOI号：

分类号： TQ174；TK513

出版年,卷(期):页码： 2024,44(3):82-88

摘要：

疏水陶瓷膜在膜蒸馏领域具有突出优势，可拓宽膜蒸馏应用场景。采用新方法制备疏水α-Al2O3陶瓷膜，表征形貌特征、疏水性能、接枝有效性及宽温域热稳定性，揭示温差对单位温差驱动能力的影响规律，测定疏水陶瓷膜蒸馏过程的离子截留率。研究结果表明：疏水陶瓷膜表面形成了较规律的粗糙结构，疏水性能优异；疏水陶瓷膜表面的1H,1H,2H,2H-全氟癸基三乙氧基硅烷发挥了疏水作用，且具有较好的高温热稳定性；基于原水温度的单位温差驱动能力(ec)随温差(△T)按-0.735 6次幂函数规律负相关变化，而基于冷却水温度的单位温差驱动能力(er)随△T按1.745 89次幂函数规律正相关变化；疏水陶瓷膜蒸馏过程对所有被测离子的截留率均大于99.96 %。该研究对指导制定疏水陶瓷膜蒸馏运行策略具有重要意义。

The hydrophobic ceramic membrane has outstanding advantages in the field of membrane distillation, which can expansion of membrane distillation application scenarios. In this paper, hydrophobic α-Al2O3 ceramic membrane was prepared by a new method. The morphological characteristics, hydrophobic properties, grafting effectiveness and wide temperature range thermal stability were characterized. The influence of temperature difference on the driving force of per unit temperature difference was revealed, and the ion rejection rate of hydrophobic ceramic membrane distillation process was determined. The results show that the hydrophobic membrane surface forms a coarse structure, and the hydrophobic performance is excellent. The 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane on the surface of the hydrophobic film played a hydrophobic role and had good high temperature thermal stability. The per unit temperature difference driving ability (ec) based on the raw water temperature changes negatively with the temperature difference (△T) according to the −0.7356 power function law, while the per unit temperature difference driving ability (er) based on the cooling water temperature changes positively with the △T according to the 1.74589 power function law. The retention rate of all tested ions by the hydrophobic ceramic membrane distillation process was greater than 99.96 %. This study is of great significance to guide the formulation of hydrophobic ceramic membrane distillation operation strategy.

基金项目：

内蒙古自治区直属高校基本科研业务项目（JY20220131)；内蒙古自治区高等学校科学研究项目（NJZY21334）

作者简介：

王海博（1987—），女，陕西西安人，讲师，博士，从事膜分离与水处理技术

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