美国马里兰大学王浩教授来访，并于明日（2月8日）上午10点在环资楼640会议室做学术报告，报告题目为Advancing Cellulosic Technologies from Molecular Perspectives。 欢迎感兴趣的老师和同学参加。
Advancing Cellulosic Technologies from Molecular Perspectives
Howard Wang
Department of Materials Science and Engineering, University of Maryland, College Park, Maryland, USA, Phone: 301-405-5240; Email: wangh@umd.edu
Cellulose is the most abundant natural polymer on earth, widely used in everyday-life products from building construction to clothing to paper.As much effort has been devoted to developing cellulose applications through novel chemistry and nanotechnology, the scope of engineering cellulosic materials will be greatly expanded if the art of manipulating individual cellulose molecules is mastered.A better fundamental understanding of molecular interactions governing cellulose coil solutions is much needed. In this study, molecular dissolution of microcrystalline cellulose (MCC) has been achieved through mixing with ionic liquid and organic solvent.The ternary phase diagram has been determined using primarily optical cloud point method and small angle neutron scattering (SANS).The mechanism of cellulose dissolution in ternary mixture has been investigated by combining SANS and quasielastic neutron scattering (QENS).Potential applications of molecular cellulose are illustrated through fabricating thin films, fibers and nanocomposites from cellulose coil solutions.The role of the coil nature of starting cellulose materials in physical properties of resulting products is discussed.
Biography
Dr. Howard Wang
obtained his Bachelor of Science in Physics from the Peking University in 1992 and Ph.D. in Materials Science and Engineering from the University of Pennsylvania in 1999. After postdoc research at NIST, He was an Assistant Professor at Michigan Technological Univ. an Associate Professor at SUNY Binghamton, and a Research Professor of Materials Science and Engineering at University of Maryland at College Park. He has had extensive research experience in neutron techniques applied to studying soft matter, nanotechnology, electronics and batteries, and authored or co-authored over 100 technical publications and 8 patents.Wang is member of Bohmische Physical Society, a recipient of the NSF Career Award, and a NIST-ARRA Senior Research Fellow.
