Nanoparticle-free and self-healing amphiphobic membrane for anti-surfactant-wetting membrane distillation

• 作者: Chun Lu Chunlei Su Hongbin Cao Thomas Horseman Feng Duan Yuping Li
• 来源期刊: 环境科学学报（英文版）
• 年，卷（期）: 2021,（2）
• 页码范围: 298-305
• 页数: 8页
• 语种: 英文

摘要

In membrane distillation(MD),complicated feed water with amphiphilic contaminants induces fouling/wetting of the MD membrane and can even lead to process failure.This study reports a facile approach to fabricate robust and self-healing hybrid amphiphobic membranes for anti-surfactant-wetting MD based on the ultra-low surface energy of flu-orinated polyhedral oligomeric silsesquioxanes(F-POSS)and its thermal induced motiva-tion and rotation.The thermal treatment makes the membranes achieving amphiphobic-ity at a very low cost of F-POSS(13.04 wt.％),which is about 1/3 of without thermal treat-ment.The prepared membrane exhibits excellent amphiphobicity,i.e.ethanol contact angle of 120.3°,without using environmentally toxic fluorinated nanoparticles.Robust MD per-formance was observed for the amphiphobic membrane in concentrated sodium dodecyl sulfate(SDS)feed solutions.Furthermore,the fabricated membrane exhibited stable am-phiphobicity even in extreme environments,including strong acid or alkaline solutions.In the event of a damaged or abraded membrane surface where the F-POSS can be removed,the amphiphobic membrane exhibits self-healing ability with additional thermal treatment.This simple approach without the use of nanoparticles provides an environmentally friendly way for fabrication of amphiphobic membranes for anti-surfactant-wetting membrane dis-tillation.