Title:Gas-Responsive Separation Membranes

Speaker:Associate Professor Dong Liangliang(Jiangnan University)

Time:10:00-11:00,December 28,2023

Venue:Room 105 of the Shaw Engineering Building

All teachers and students are welcome to attend!

School of Chemistry and Chemical Engineering

December 25,2023

Speaker Profile:

Dong Liangliang,Ph.D.(Dual Degree),Associate Professor,Doctoral Supervisor.Deputy Director of Jiangsu Industrial Chromatography Separation Center,Director of the 41st Chinese Chemical Society,and Member of the Youth Working Committee of the Chinese Chemical Society.In 2018,he obtained his Ph.D.in Science from the University of Sherbrooke,Canada,and his Ph.D.from Jiangnan University.Since 2019,he has been working at the School of Chemistry and Materials Engineering,Jiangnan University.From 2019 to 2022,he worked on loan at the Department of Chemistry of the National Natural Science Foundation of China.He has successively undertaken projects funded by the National Natural Science Foundation of China and the Jiangsu Provincial Outstanding Youth/Youth Fund.He has also participated in projects funded by the Ministry of Science and Technology,the National Natural Science Foundation of China,and other joint funds as a key member.He has published more than 30 research papers in SCI journals such as Nat.Commun.,Sci.Adv.,Angew,Nano Energy,Chem.Eng.J.,as the first or corresponding author.

Abstract:

Stimuli-responsive separation membranes are a class of intelligent separation membranes that can spontaneously regulate the physicochemical properties of the membrane to reversibly adjust membrane flux and selectivity bysensingchanges in the surrounding environment.However,traditional responsive separation membranes suffer from issues such as membrane structure damage by stimuli sources(e.g.,pH,light,heat)and poor membrane cycling stability.To address these problems,we have utilized the unique advantage of CO2-responsive polymers that can undergo reversible structural and property changes under mild gas stimulation.By employing methods such as chemical grafting and confined assembly,we have prepared a series of CO2-responsive separation membrane materials.During operation,by alternately bubbling CO2 and N2 into the solution,we can regulate the reversible swelling and contraction of polymer chains,achieving dynamic transitions of membrane pore sizes at the micrometer,nanometer,and sub-nanometer scales,and ultimately realizing dynamic regulation of membrane flux and separation selectivity.In addition,in cooperation with well-known domestic membrane companies,we have established a CO2-responsive separation membrane production line for applications in oily wastewater treatment,drug separation and purification,and other fields.Currently,the membrane components are undergoing stability testing in operation,and we are advancing the industrialization process of CO2-responsive separation membranes.