One-step fabrication of ultrathin porous Janus membrane within seconds for waterproof and breathable electronic skin  

一步秒级制备超薄多孔Janus膜及其在防水透气电子皮肤的应用

作　　者：Yufeng Ni Bing Li Chengzhen Chu Shaofan Wang Yujie Jia Shichun Cao Rasoul Esmaeely Neisiany Chuanglong He Shuo Chen Zhengwei You 倪宇峰;李兵;储成臻;王少凡;贾宇杰;曹诗春;Rasoul Esmaeely Neisiany;何创龙;陈硕;游正伟

机构地区：[1]State Key Laboratory of Advanced Fiber Materials,Institute of Functional Materials,College of Materials Science and Engineering,Research Base of Textile Materials for Flexible Electronics and Biomedical Applications(China Textile Engineering Society),Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine,Shanghai Key Laboratory of Lightweight Composite,Donghua University,Shanghai 201620,China [2]College of Biological Science and Medical Engineering,Donghua University,Shanghai 201620,China [3]Department of Materials and Polymer Engineering,Faculty of Engineering,Hakim Sabzevari University,Sabzevar,9617976487,Iran [4]Biotechnology Centre,Silesian University of Technology,Gliwice,44-100,Poland

出　　处：《Science Bulletin》2025年第5期712-721,共10页科学通报(英文版)

基　　金：National Natural Science Foundation of China(52473004,52173117,32401133,and 21991123);Science and Technology Commission of Shanghai(20DZ2254900)。

摘　　要：It remains a challenge for a simple and scalable method to fabricate ultrathin porous Janus membranes for stretchable on-skin electronics.Here,we propose a one-step droplet spreading phase separation strategy to prepare an ultrathin and easily collected Janus thermoplastic polyurethane(TPU)membrane within seconds.The metal-ion solvation structure mitigated migration kinetics to delay TPU solution demixing,promoting the further penetration of the coagulating solvent.Consequently,the developed membranes,with an average preparation rate of 25.2 cm^(2)s^(−1),had a thickness of 5μm,and the water vapor transmission rate was determined to be 663 g m^(−2) d^(−1).The small pore layer having an average pore size of 1.7μm effectively blocked external liquid water.The porous Janus TPU membrane coated by liquid metal served as a building block to develop a new generation of monolithic stretchable electronics with simultaneous high permeability and waterproofness.

关 键 词：POROUS POLYURETHANE kinetics 

分 类 号：O64[理学—物理化学]