【3rd.Jan.】Hydrogels as Amphibious Carriers for Nanoparticle Phase Transfe
日期：2016-01-03
閱讀：895
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TOPIC：Hydrogels as Amphibious Carriers for Nanoparticle Phase Transfe
SPEAKER：Prof.Dayang Wang ，School of Engineering, RMIT University, Melbourne, VIC 3001, Australia?
TIME：January 3 (Tuesday)15:00 pm
LOCATION：Room 410, Chemistry Building B (化學B樓410會議室)
INVITER：陳接勝 教授?
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Abstract
This talk will present a fairly simple and versatile way to use hydrogel as a generic carrier to directly and freely transfer various nanoparticulate materials into different media and thus encapsulate them without need of chemical modification of the loading guests and the hydrogel network and any size matching or chemical affinity of the loading guests for the hydrogel host.1-3 The key of the present methodology is to use water-miscible organic solvents such as tetrahydrofuran and isopropanol intermediates to reversibly exchange the aqueous milieu initially absorbed in the hydrogel with water-immiscible organic solvents such as chloroform or hexane, thanks to the fact that the hydrogels themselves can be dispersed in a wide range of solvents of different polarity. Over the course of solvent exchange in the hydrogel, one can reversibly change the polarity of the hydrogel at will, which make the hydrogel like an amphibious submarine to direct hydrophilic materials into the organic solvent-soaked gel matrix (organogel) or lipophilic materials into the water-swollen gel matrix (hydrogel) and thus encapsulate inside the gel matrix as a result of the loading guest being completely incompatible with the surrounding medium. The proper control of the solvent exchange procedure allows little deterioration of the intrinsic properties and even surface properties of the loading guest materials. The present methodology also allows simultaneous or stepwise loading of different materials into one hydrogel in a tailor designed manner to produce multi-component composites. In this talk, inorganic nanoparticles and enzymes will be used as models to demonstrate our concept. But the present methodology should be easily extended to other materials, for instance various organic molecules and macromolecules with different water solubility.?
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1.C. Cheng, D. Wang, Angew. Chem. Int. Ed, 2016, 55, 6853
2.S. Bai, T. L. Nguyen, P. Mulvaney, D. Wang, Adv. Mater. 2010, 22, 3247.
3.S. Bai, C. Wu, K. Gawlitza, R. von Klitzing, M. B. Ansorge-Schumacher, D. Wang, Langmuir 2010, 26, 12980.
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Biography：
?? 汪大洋 教授是國際膠體界面科學領(lǐng)域知名學者，英國皇家化學會會士（FRSC）。1972年出生于遼寧沈陽。1993年于吉林大學化學系獲得高分子材料本科畢業(yè)。1998年吉林大學化學系獲得高分子化學與物理博士畢業(yè)， 從師于湯心頤，白玉白和李鐵津教授。1999年1月 至 9 月，在香港科技大學機械工程系David C. C. Lam教授研究組做博士后研究。 1999年10 月起，開始在德國馬普膠體界面所（Max Planck Institute of Colloids and Interfaces）的Helmuth M?hwald教授領(lǐng)導的界面部工作。1999年10月至2003年6月在Frank Caruso 教授的研究小組做博士后研究， 并于2000年11月至2002年2月間獲得德國洪堡基金會（Alexander von Humboldt Research Fellowship）獎學金。2003年7月起在界面部擔任研究小組組長（Group Leader）。2010年7月－2015年6月在澳大利亞南澳大學Ian Wark研究所任物理化學終身研究教授 (Continuing Research Professor Position)。 2015年7月起在皇家墨爾本理工大學任化工系終身教授 (Continuing Professor Position)。2016年獲聘中組部“千人計劃” 專家，于吉林大學化學學院任特聘教授。??
?? 汪大洋教授的主要研究方向包括：水、氣、離子和粒子的界面行為；表面潤濕和粘附；相轉(zhuǎn)移；粒子分散與聚集；界面相分離； 界面催化；酶等生物材料的包埋；穿越生物界面的藥物傳送；環(huán)境治理和修復(fù)以及廢物廢能資源再利用。在截至目前已發(fā)表4個學術(shù)專著章節(jié)和128余篇高水平的研究論文，其中30%以上均發(fā)表在化學和材料科學領(lǐng)域頂級雜志上（影響因子> 10），其中Angew. Chem. Int. Ed. 13篇。共被引用約5400次，H指數(shù)為42。
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