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题名: Preparation and Characterization of Graphene Sheet-Polyimide Nanocomposite Films
作者: Zhang, Li-bin1;  Wang, Jin-qing1;  Yang, Sheng-rong1;  Kong, Xiang-zheng2
关键词: Graphene sheet-polyimide films ;  In situ reduction ;  Anti-static film ;  Surface resistivity ;  Mechanical properties
刊名: ACTA POLYMERICA SINICA
发表日期: 2014-11-20
期: 11, 页:1472-1478
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Polymer Science
研究领域[WOS]: Polymer Science
英文摘要: Graphene oxide (GO) sheets were first synthesized through oxidation of natural graphite by a modified Hummers method, and then their homogeneous and stable dispersion in N, N'-dimethylformamide (DMF) was obtained. Stable and homogeneous solution mixtures of GO and PAA (polyamic acid) in DMF at different mass ratios of GO/PAA were readily prepared. Uniform composite films of GO-FAA were subsequently prepared by solution casting. FAA was turned to polyimides (PT) and GO reduced in situ to grapheme (GS) at the same time by a subsequent thermal imidization of GO-FAA films, leading to composite films of GS-PI. Electrical resistivity, thermal stability and mechanical property of GS-PI films were studied. The results indicate that the surface resistivity of GS-PI films was significantly decreased with the increase in GS content,lowered to about 10(6) Omega, the standard of the anti-static electricity film, in the film prepared with 1.0 wt% of GO in GO-PAA. The tensile strength and the elongation at break of GS-PI composite films were both increased with increase in GS content, reached their maxima in the film prepared with 0.6 wt% of GO in GO-PAA, followed by regular decreases with further increase in GS. Different from the tensile strength and the elongation at break, the tensile modulus of GS-PI was in constant increase with GS content in the film. An increase of 37% was detected in GS-PI film prepared with 3.0 wt% of GO. Moreover, the ductility and the thermal stability of GS-PI were well kept in all the composite films regardless of its GS content.
关键词[WOS]: POLYMER NANOCOMPOSITES ;  MECHANICAL-PROPERTIES ;  OXIDE NANOCOMPOSITES ;  GRAPHITE OXIDE ;  COMPOSITES ;  INTERFACE ;  MEMBRANE ;  DYNAMICS
语种: 英语
WOS记录号: WOS:000346552800006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145831
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem Phys, Lanzhou 730000, Peoples R China
2.Univ Jinan, Coll Chem & Chem Engn, Jinan 250022, Peoples R China

Recommended Citation:
Zhang, Li-bin,Wang, Jin-qing,Yang, Sheng-rong,et al. Preparation and Characterization of Graphene Sheet-Polyimide Nanocomposite Films[J]. ACTA POLYMERICA SINICA,2014(11):1472-1478.
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