膜科学与技术

二维蛭石膜的酸改性及性能研究

作者：郑梦娇，刘壮，谢锐，巨晓洁，汪伟，褚良银

单位：四川大学化学工程学院，成都 610065

关键词：蛭石膜；二维材料；稳定性；水通量

出版年,卷(期):页码： 2023,43(5):58-64

摘要：

本文基于酸解蛭石（VMT）片层骨架中的八面体结构，构建了HCl-VMT膜、HBr-VMT膜、HI-VMT膜，考察了酸改性对于VMT膜形貌结构、水相稳定性及传质性能的影响。表征结果证明酸改性VMT膜层状结构未被破坏，仍然具有规整的2D通道，且各项元素均匀分布。酸改性VMT膜在水相中的长期稳定性显著提升，酸改性VMT膜的水蒸汽扩散通量由空白VMT膜的0.16 mol/（h·m2·kPa）分别增加到10倍左右。本文为后续VMT膜在离子传输和分离领域的应用研究提供了新的策略。

In this paper, HCl-VMT, HBr-VMT and HI-VMT membranes are constructed based on acidolysis of octahedral structure in VMT lamellar framework. The effects of acid treatment on the morphology, stability in water and mass transfer performance of the VMT membranes are investigated. The results show that the acid-modified VMT membranes remain intact and regular 2D channels, and uniformly distributed elements. Acid-modified VMT membrane has extraordinary long-term stability in water phase, and the water vapor diffusion flux increases from 0.16 mol/(h·m2·kPa) of the blank VMT membrane to about 10 times, respectively. This paper provides a new strategy for the application study of preparing stable VMT membranes in the field of ion stable transport and separation.

郑梦娇（1998—），女，河南省漯河市人，硕士研究生，研究方向为膜科学与技术，Email:779097426@qq.com

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