特种功能材料重点实验室

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汪大洋:How hydrophilic can a hydrophilic surface be(时间11.13)

信息来源: 发布日期: 2018-11-13作者: 浏览次数:

报告人:汪大洋 吉林大学教授

报告时间:11月13日15:00-17:00

报告地点:特种功能材料重点实验室二楼报告厅

主办单位:特种功能材料重点实验室

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汪大洋教授目前的研究兴趣是对表界面现象分子机理的探索,包括表面润湿和粘附,相转移,粒子分散与聚集与界面相分离,并且积极地将基础科学研究成果转化为新型的环境治理以及资源再利用技术。

Abstract:

This presentation will focus mainly on our recent study of how the macroscopic wetting behaviour of charged surfaces is correlated with their microscopic chemical nature of the surface ionic groups. In this work polyelectrolyte multilayers (PEMs) were used as model charged surfaces.1 With the aid of surface sensitive – spectroscopic techniques, we demonstrate the surface wetting behaviour of the PEMs is more closely correlated with the configurational geometry rather than hydrate strength of the uncompensated ionic groups on the surface capping layers2,3. The lessons learnt from the surface wetting and the internal structures of as-prepared PEMs have successfully been translated to an innovative superoleophobic coating strategy, which is simple, versatile, cost-effective, and nanostructure-independent comparing to currently available ones. This has enabled us to easily transform conventional stainless steel meshes to highly effective filters for oil-water separation in high separation efficiency and high water flux, which can be easily scaled up for industrial oil/water separations such as oil spill cleanup in seawater.