To prepare GO/Polyolefin nanocomposites with enhanced mechanical, electrical, or thermal properties is still a challenge due to the poor interfacial adhesion between GO and non-polar polyolefins. In this study, we rep...To prepare GO/Polyolefin nanocomposites with enhanced mechanical, electrical, or thermal properties is still a challenge due to the poor interfacial adhesion between GO and non-polar polyolefins. In this study, we report an effective strategy for the polyolefin-functionalized graphene oxide （fGO） using two-step methods GO was firstly modified by using glycidyl methacrylate （GMA） and styrene （St） dual monomers grafting method, thus GO-g-（GMA-co-St） with numerous epoxide groups is obtained. Then through the reaction between the epoxide group of GMA and anhydride group of maleic anhydrides （MAH） of the prepared HDPE-g-（MAH-co-St）, GO-g-HDPE-g-（MAH-co-St） could be obtained. The successful prepara- tion of the GO-g-HDPE-g-（MAH-co-St） was confirmed by AFM, TEM, FTIR, XRD, DSC, and TGA characterization. The results show the grafting ratios of the poly（GMA-co-St） and HDPE-g-（MAH-co-St） being up to 50.4 wt% and 70.4 wt%, respectively. The functionalized GO shows homogeneous dispersion in the nanocomposites with HDPE, and the stress at break and strain at break of the nanocomposite is increased by 28.7% and 130% respectively with only 0.2 wt% fGO loading. The approach of the polyolefin- functionalized GO paves a new way to develop not only polyolefin/graphene nanocomposites but also excellent nanocomposites of polyolefin/engineering plastic blends with graphene.展开更多
基金the financial support from the National Natural Science Foundation of China(No. 51633003)State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology(No. OIC-201601006)
文摘To prepare GO/Polyolefin nanocomposites with enhanced mechanical, electrical, or thermal properties is still a challenge due to the poor interfacial adhesion between GO and non-polar polyolefins. In this study, we report an effective strategy for the polyolefin-functionalized graphene oxide （fGO） using two-step methods GO was firstly modified by using glycidyl methacrylate （GMA） and styrene （St） dual monomers grafting method, thus GO-g-（GMA-co-St） with numerous epoxide groups is obtained. Then through the reaction between the epoxide group of GMA and anhydride group of maleic anhydrides （MAH） of the prepared HDPE-g-（MAH-co-St）, GO-g-HDPE-g-（MAH-co-St） could be obtained. The successful prepara- tion of the GO-g-HDPE-g-（MAH-co-St） was confirmed by AFM, TEM, FTIR, XRD, DSC, and TGA characterization. The results show the grafting ratios of the poly（GMA-co-St） and HDPE-g-（MAH-co-St） being up to 50.4 wt% and 70.4 wt%, respectively. The functionalized GO shows homogeneous dispersion in the nanocomposites with HDPE, and the stress at break and strain at break of the nanocomposite is increased by 28.7% and 130% respectively with only 0.2 wt% fGO loading. The approach of the polyolefin- functionalized GO paves a new way to develop not only polyolefin/graphene nanocomposites but also excellent nanocomposites of polyolefin/engineering plastic blends with graphene.
