Yong Zhang is a professor at the School of Chemistry and Chemical Engineering ofShanghai Jiao Tong University. He received BSc in 1984 and PhD in 1992 fromChengdu University of Science and Technology (now Sichuan University). He was avisiting student of Loughborough University of Technology of UK in 1990-1992and a visiting scholar at Stuttgart University of Germany in 2005. He joinedShanghai Jiao Tong University as a lecturer in 1992 and promoted to a professorin 1997. His research group carried out more than 50 projects funded by theNational Natural Science Foundation of China and International Companies. He isthe co-recipient of a State-Level Teaching Award and a Shanghai Award forTechnological Invention 2nd Prize. He is the co-author of more than 190publications in peer-reviewed journals and the co-inventor of more than 40patents. His current research interests include polymer processing andmodification.
Pyrene-functionalizedpoly (methyl methacrylate)-block-polydimethylsiloxane (Py-PMMA-b-PDMS) copolymers were synthesized viaactivators regenerated by anelectrontransfer atom transfer radical polymerization (ARGET ATRP) method and further used to functionalize graphene oxide (GO) through the π-π interaction between pyrene and thecarbon sheets. The modification efficiency of the non-covalently functionalizedGO particles (GO@Py-PMMA-b-PDMS)particles was evaluated bystudyingtheir effects on the mechanical, optical andthermal properties of the PMMA. With incorporationof a small amount of GO@Py-PMMA-b-PDMS, the tensile strength, Young’s modulus, elongationat break and toughness of PMMA were simultaneously increased, showing simultaneously reinforcingand toughening effects of the functionalized GO particles. The initialdecomposition temperature of PMMA wasincreased to a small extent. Meanwhile, the haze value of the nanocompositeswas higher than that of original PMMA. The refractive index of the nanocomposites showed a good linear increase. Theimprovement of the physical properties of PMMA can be attributed to the homogeneousdispersion and enhanced interfacial adhesion between GO@Py-PMMA-b-PDMS and PMMA.This work has demonstrated the feasibility of using GO@Py-PMMA-b-PDMS as amodifier for simultaneously improving the mechanical, optical and thermalproperties of PMMA for potential organic light-emitting diodes and organicphotovoltaics applications.
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E-mail: meeting@c-gia.org
Abstract: Minyang Lu
Sponsor: Wenyang Yang
Media: Liping Wang
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