Preparation and characterisation of covalent polymer functionalized graphene oxide
Preparation and characterisation of covalent polymer functionalized graphene oxide
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DOI：
10.1039/c0jm01859g
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发表时间：
2011-01-01
影响因子：
--
通讯作者：
Song, Mo
中科院分区：
文献类型：
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作者：
Lin, Yue;Jin, Jie;Song, Mo
成功制备了共价键合的聚乙烯接枝氧化石墨烯杂化材料。采用γ-氨丙基三乙氧基硅烷（APTES）包覆氧化石墨烯片，然后在APTES包覆的氧化石墨烯片上接枝马来酸酐接枝聚乙烯（MA-g-PE），并通过傅里叶变换红外光谱、X射线光电子能谱和差示扫描量热分析等手段进行了表征。与纯MA-g-PE相比，官能化导致96重量%的聚合物接枝效率和10摄氏度的结晶温度增加。通过TEM观察官能化氧化石墨烯片的包封结构。对于功能化氧化石墨烯的潜在应用，本文以PE/功能化氧化石墨烯纳米复合材料为例进行了评估。初步结果表明，PE的杨氏模量、屈服强度和拉伸强度可以通过在非常低的负载下掺入PE-接枝-氧化石墨烯来改善。该方案可以拓宽石墨烯在非极性聚合物/石墨烯纳米复合材料开发中的潜在应用。
A covalently bonded polyethylene grafted graphene oxide hybrid material was fabricated successfully. Gamma-aminopropyltriethoxysilane (APTES) was firstly coated onto the graphene oxide sheets, and then maleic anhydride grafted polyethylene (MA-g-PE) was grafted onto the APTES coated graphene oxide sheets, which were confirmed by means of Fourier transform infrared, X-ray photoelectron and differential scanning calorimetry techniques. Functionalization resulted in 96 wt% polymer grafting efficiency, and a 10 degrees C increase in the crystallisation temperature, compared with that of the pure MA-g-PE. An encapsulating structure of the functionalised graphene oxide sheets was observed by means of TEM. For the potential application of the functionalised graphene oxide, PE/functionalised graphene oxide nanocomposites as an example was assessed in this paper. Initial results showed that Young's modulus, yielding strength and tensile strength of PE can be improved by incorporation of the PE-graft-graphene oxide at very low loadings. This protocol could broad the potential application of graphene in the development of non-polar polymer/graphene nanocomposites.