Open Access Nano Express

Effects of the alkylamine functionalization of graphene oxide on the properties of polystyrene nanocomposites

Jinhee Jang, Viet Hung Pham, Balasubramaniyan Rajagopalan, Seung Hyun Hur and Jin Suk Chung*

Author Affiliations

School of Chemical Engineering, University of Ulsan, Namgu, 93 Daehakro, Ulsan, 680-749, Republic of Korea

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Nanoscale Research Letters 2014, 9:265  doi:10.1186/1556-276X-9-265

Published: 28 May 2014

Abstract

Alkylamine-functionalized graphene oxides (FGOs) have superior dispersibility in low-polar solvents and, as a result, they interact with low-polar polymers such as polystyrene. In this work, the functionalization of graphene oxide using three types of alkylamines, octylamine (OA), dodecylamine (DDA), and hexadecylamine (HDA), was performed, and nanocomposites of polystyrene (PS) and FGOs were prepared via solution blending. Different dispersions of FGOs over PS were obtained for the three alkylamines, and the properties of the PS composites were influenced by the length of the alkylamine. A better thermal stability was observed with a longer chain length of the alkylamine. On the other hand, functionalization with the shortest chain length alkylamine resulted in the highest increase in the storage modulus (3,640 MPa, 140%) at a 10 wt.% loading of FGO.

Keywords:
Graphene oxide; Functionalization; Alkylamine; Polystyrene; Nanocomposites