DISPERSION OF GRAPHENE OXIDE AND ITS FLAME RETARDANCY EFFECT ON EPOXY NANOCOMPOSITES.pdf

ChineseJournalofPolymerScience Vo1．29,No．3，0011)，368-376 ChineseJournalofPolymerScience ◎ Chinese Chemical Society Institute of Chemistry，CAS Springer-Verlag Berlin Heidelberg 20 1 1 DISPERSION OF GRAPHENE oXIDE AND ITS FLAM E RETARDANCY EFFECT oN EPOXY NANoCoM PoSITES Zhou W ang ，Xiu—zhi Tang ，Zhong—zhen Yu ”， Peng Guo ，Huai-he Song and Xu．sheng Du。 BeijingKeyLaboratoryonPreparation andPr0cessingofNovelPolymericMaterials, Department ofPolymer Engineering,Colege ofMaterials Science and Engineering, Beiing University ofChemical Technology,Be(ring 100029．China 。State Key Laboratory ofChemical Resource Engineering,Colege ofMaterials Science and Engineering, Beijing University ofChemical Technology,Beifng 100029．China CentreforAdvancedMaterials Technology,SchoolofAerospace,MechanicalandMechatronicEngineeringJO 7． The University ofSydney,Sydney,NSW2oo6．Australia Abstract Graphene oxide was prepared by ultrasonication of completely oxidized graphite and used to improve the flame retardancy of epoxy．The epoxy／graphene oxide nanocomposite was studied in terms of exfoliation／dispersion．therm a1 stability and flame retardancy．X．ray diffraction and transmission electron microscopy confirmed the exfoliation of the graphene oxide nanosheets in epoxy matrix．Cone calorimeter measurements showed that the time to ignition of the epoxy／graphene oxide nanocomposite was longer than that of neat epoxy．The heat release rate curve of the nanocomposite was broadened compared to that of neat epoxy and the peak heat release rate decreased as wel1． Keywords：Graphene oxide；Epoxy；Nanocomposite；Flame retardancy INTRoDUCTIoN Graphene has a 2一dimentional crystalline structure and consists of only one layer of carbon atoms．and exhibits many functionalities including high stiffness．high thermal and electrica1 conductivities【 ．Much atention has been paid to the preparation of polymer nanocomposites using graphene as a functional nanofiller．Ruoff et a1．【 prepared polystyrene／graphene nanocomposi