Flexible dual-Janus porous membrane for underwater gas bubbles anti-buoyancy unidirectional transportation  

作　　者：Shuang Ben Han Ma Rui Liu Yuzhen Ning Zhihong Zhao Xudong Zhang Qiang Li Kesong Liu 

机构地区：[1]School of Materials Science and Engineering,Shenyang Ligong University,Shenyang 110159,China [2]Tianmushan Laboratory,Hangzhou 310023,China [3]School of Equipment Engineering,Shenyang Ligong University,Shenyang 110159,China [4]Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology,School of Chemistry,Beihang University,Beijing 100191,China [5]School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China

出　　处：《Science China Chemistry》2025年第3期881-890,共10页中国科学(化学英文版)

基　　金：supported by the National Natural Science Foundation of China (22105014,21871020,52303143);the China Postdoctoral Science Foundation (2020M680296,2022T150035,2021TQ0023);the High-level Talent Project of Shenyang Ligong University;the Special fund of Basic Scientific Research Expenses for Undergraduate Universities in Liaoning Province (LJ212410144077,LJ212410144072);the Beijing Young Talent Support Program;the 111 Project;the Fundamental Research Funds for the Central Universities。

摘　　要：Controllable transportation of bubbles in surfactant or aqueous is very important in daily chemical products,food fermentation,mineral flotation and other fields.However,bubbles are mainly dominated by buoyancy and move upward in solution,which makes the manipulation of bubbles difficult.Although some progress has been made in controlling underwater bubbles,achieving continuous transportation and collection of underwater bubbles without relying on external forces is still a great challenge.To this end,we bionically designed a flexible polydimethylsiloxane(PDMS)porous surface with dual-Janus characteristics.Namely,a porous PDMS membrane integrating structural gradient and wettability gradient realizes the underwater anti-buoyancy unidirectional transportation of bubbles without external force input,and possesses the capability of underwater gas anti-buoyancy transportation and storage.This work provides inspiration and direction for the development and design of underwater gas transportation and storage devices and provides innovative thinking for the implementation of seabed carbon dioxide storage technology.

关 键 词：air diode anti-buoyancy unidirectional penetration without additional force dual-Janus membranes wettability gradient structural gradient 

分 类 号：TB383.2[一般工业技术—材料科学与工程]