Presenter: Prof. Dayang Wang (RMIT University, Australia)
Topic: How hydrophilic can a hydrophilic surface be?
Time: 02:00 PM, Sept.23th (Friday)
Location: ConferenceRoom B, BLDG 909-1F
Abstract
This presentationwill focus mainly on our recent study of how the macroscopic wetting behaviourof charged surfaces is correlated with their microscopic chemical nature of thesurface ionic groups. In this work polyelectrolyte multilayers (PEMs) were usedas model charged surfaces.1 With the aid of sum frequency generation and X-rayphotoelectron spectroscopy, we demonstrate the surface wetting behaviour of thePEMs is more closely correlated with the configurational geometry rather thanhydrate strength of the uncompensated ionic groups on the surface cappinglayers. The lessons learnt from the surface wetting and the internal structuresof as-prepared PEMs have successfully been translated to an innovativesuperoleophobic coating strategy, which is simple, versatile, cost-effective,and nanostructure-independent comparing to currently available ones. This hasenabled us to easily transform conventional stainless steel meshes to highlyeffective filters for oil-water separation in high separation efficiency andhigh water flux, which can be easily scaled up for industrial oil/waterseparations such as oil spill cleanup in seawater.
Biography
Dayang Wang is Professor of Chemical Engineering atthe School of Engineering at the RMIT University, Melbourne, Australia, and Fellow of the RoyalSociety of Chemistry (FRSC). Prior to his currentposition, he was Research Professor of PhysicalChemistry at the Ian Wark Research Institute, University of South Australia, inAdelaide, Australia. Before moving to Australia in 2010, he was group leader at theprestigious Max Planck Institute of Colloids and Interfaces (MPI-KG), inPotsdam, Germany, and held that role for seven years. As a post-doctoral fellowat the MPI-KG from 1999-2003, he received the highly esteemed Alexander von HumboldtResearch Fellowship (2002). He completed his PhD at Jilin University, where hestudied chemistry, in 1998. Till now, Dayang has published 4 book chapters and120 articles in peer-reviewed leading journals in Chemistry and MaterialsScience. According to ISI Web of Science(Research ID: A-6676-2012), his index is 41 with total citations of 5200 over120 publications. He is aco-inventor on 2 PCT patent applications on water treatment technology, one ofwhich has already led to a manufacture license deal ($450K) with Hyflux,Singapore. His research interestsinclude interface adsorption and transfer, crystallization, self-assembly,hydrogel, and encapsulation and delivery.
Contact:Prof. Lifeng Chi
(责任编辑：张伶 邮箱：462696345@qq.com)
