Fabrication of polyimide-based nanocomposites containing functionalized graphene oxide nanosheets by in-situ polymerization and their properties
| Autor: | Shizhen Dai, Fucheng Ye, Yong Qian, Jianping Xu, Yanfei Lan |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Materials science Nanocomposite Graphene General Physics and Astronomy Surfaces and Interfaces General Chemistry Polymer Condensed Matter Physics Surfaces Coatings and Films law.invention Polymerization chemistry law Thermal stability In situ polymerization Composite material Glass transition Polyimide |
| Zdroj: | Applied Surface Science. 314:991-999 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2014.06.130 |
| Popis: | In this study, a facile and effective strategy is proposed to fabricate polyimide (PI)-based nanocomposites containing functionalized graphene oxide (FGO) nanosheets by in-situ polymerization and thermal imidization. Highly dispersed CIGO which was firstly obtained by graphene oxide (GO) functionalized with cyclohexyl isocyanate (CI) exhibited excellent dispersibility and compatibility in polyamic acid (PAA, precursor of PI) matrix via in-situ polymerization. Then the CIGO sheets were partially thermally reduced efficiently to FGO during the thermal imidization process of PAA. The incorporation of FGO sheets significantly affected the macroscopic properties of the PI-based composites. A 56.5% increase in the tensile strength and a 43.8% improvement in the Young's modulus were achieved for 2.0 wt% FGO loading. Furthermore, the thermal stability and glass transition temperature ( T g ) were improved by adding FGO. In addition, the hydrophobic behavior of the PI-FGO composite clearly improved because of the excellent hydrophobic properties of FGO. The success of this approach provides a good rational for developing high-performance polymer-based composite materials. |
| Databáze: | OpenAIRE |
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