《科学大讲堂 第254期》金万勤 教授：限域传质分离膜的精密构筑与应用

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• 题目: 限域传质分离膜的精密构筑与应用
• 主讲人：金万勤 教授 @ 南京工业大学
• 时间：2026年9月8日 10:00
• 地点：理学院一楼化学系C1038报告厅

主讲人简介

Professor Wanqin Jin is the director of the National Key Laboratory of Materials Chemical Engineering at Nanjing Tech University. He is a Fellow of the Chinese Chemical Society and the Royal Society of Chemistry (UK), the leader of a National Huang Danian-Style Teacher Team, and a recipient of the State Council Special Allowance. He has published more than 400 SCI-indexed papers in journals including Nature, Science, and Nature Materials, which have received more than 40,000 citations. He has also been granted more than 50 invention patents. As the first awardee, he has received one Second Prize of the National Science and Technology Progress Award and four First Prizes at the provincial or ministerial level. He is also a recipient of the National May 1st Labor Medal, the Hou Debang Chemical Science and Technology Award for Achievement, the Underwood Medal of the Institution of Chemical Engineers (IChemE) for separation science, and the Humboldt Research Award from the Alexander von Humboldt Foundation in Germany.

讲座简介

Confined mass transfer refers to the mass transfer behavior of fluids in spaces whose characteristic dimensions are comparable to the molecular mean free path. In the field of membrane separation, when the characteristic dimensions of membrane pores decrease to a certain scale, the membrane pores become confined spaces for fluid transport. Under confinement, the effects of pore walls on fluid molecules, which would otherwise be negligible, become significantly enhanced, thereby exerting pronounced effects on permeability and selectivity and becoming important or even decisive factors governing the transport process. The resulting anomalous mass transfer phenomenon is referred to as the confined mass transfer effect. Separation membranes based on confined mass transfer are mainly used for the separation of homogeneous solution or gas systems and involve high-precision separation processes at the molecular/ionic level, such as gas separation including carbon dioxide separation, pervaporation, and nanofiltration. One of the keys to achieving efficient molecular separation is the construction and regulation of sub-nanometer mass transfer channels in separation membranes based on confined mass transfer.

This presentation will focus on separation membranes based on confined mass transfer, including two-dimensional material membranes, metal-organic framework membranes, and organic/inorganic composite membranes, which possess fast and selective transport channels for gas, water, and solvent molecules. It will discuss how theories and methods from materials science, physical chemistry, and mathematics can be integrated to construct sub-nanometer mass transfer channels in separation membranes and to explore the mass transfer mechanisms of molecules and ions within the sub-nanometer channels of confined mass transfer membranes, thereby enabling efficient molecular-scale separation.

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