石墨/聚乙烯醇复合纳米纤维的制备及性能表征  

Preparation and characterization of graphite/PVA composite nanofibers

作　　者：王春红[1] 贺文婷[1] 王莹[1] 李康[1] 

机构地区：[1]天津工业大学纺织学部,天津300387

出　　处：《天津工业大学学报》2015年第2期11-15,共5页Journal of Tiangong University

基　　金：国家自然科学基金资助项目(51303131);中国纺织工业协会科技指导性项目(2088026)

摘　　要：应用静电纺丝技术制备石墨/聚乙烯醇(PVA)纳米纤维,并将该复合纤维收集成无纺布薄膜;采用扫描电子显微镜(SEM)观察了复合纤维的微观形貌和结构,利用宽频质谱仪测试了纤维的导电性,利用万能强力机测试了不同纳米石墨含量纤维薄膜的拉伸力学性能,并利用X射线衍射仪(XRD)和热重分析仪(TG)测试了复合纤维的物相及热力学行为.结果表明:在聚乙烯醇质量分数为8%、石墨质量分数为4%时,所制备的纳米纤维膜导电性最高,且力学性能最好,与纯PVA相比,电导率和断裂强度分别提高1个数量级和127.33%;XRD测试结果表明,纳米石墨成功附着在PVA中;TG结果表明,石墨/PVA复合纤维初始分解温度相对于纯PVA变化不大,当样品质量保持率为40%时,4%石墨/PVA复合纤维较纯PVA相比,其分解温度提高了35℃.The electrospinning technology was used to produce graphite/poly （vinyl alcohol）（PVA） composite nanofibers.SEM was used to investigate fiber microstructure, broadband dielectric spectrometer was used to investigate theconductivity, all purpose strength tester was used to test the tensile strength of nanofiber membrane with differentgraphite contents; and XRD and TGA were used to investigate the phase and thermal properties. The resultsrevealed that the conductivity and tensile strength of the nanofiber membrane reached the highest with 8% PVAand 4% graphite, increased by one order of magnitude and 127.33% respectively. The inclusion of nanographitein the nanocomposite fibers is confirmed by XRD. The TG results showed that compared with PVA nanofibers,the initial heat decomposition temperature of graphite/PVA composite nanofibers had little change, but when theweight percentage was 40% , the heat decomposition temperature of composite nanofibers with 4% graphiteincreased by 35 ℃.

关 键 词：石墨 聚乙烯醇 纳米纤维膜 热稳定性 电导率 

分 类 号：TS102.65[轻工技术与工程—纺织工程] TQ340.64[轻工技术与工程—纺织科学与工程]