Experimental research on adhesion of polythiophene nanofibers
首发时间:2019-05-21
Abstract:Polythiophene(Pth) is easy to be modified, and holds others unique properties, including that, the degree of polymerization can be controlled, and the nanofibers prepared under special conditions are stronger than aluminum. As a new type of polymer material, polythiophene is the main material for organic semiconductors, electrode materials and sensors. But the mechanical failure of polythiophene materials may lead to the malfunction or even failure of the entire device. However, related researches on the mechanical properties of Pth are mainly concentrated on bulks or films. None of these research has been done on the mechanical properties of single Pth nanofibers. In this thesis, the mechanical properties of Pth nanofibers were experimentally studied and analyzed. For example, the adhesion properties of Pth nanofibers were studied and analyzed. The adhesion between the same probe and Pth nanofibers in the diameter range of 85-180nm was systematically tested by atomic force microscopy. The test results demonstrated that the average adhesion between the Pth nanofibers with the length range of 8-23μm and the AFM probe was 107.02±7.06 nN. After comparing the adhesion test results between the same AFM probes and different nanofibers such as Pth nanofibers, PVDF nanofibers and silver nanowires, it was found that the adhesion between Pth nanofibers and the AFM probe was stronger than that of the others.
keywords: polythiophene nanofibers adhesion polyvinylidene fluoride polymer nanofibers silver nanowires
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聚噻吩纳米纤维黏附力的实验研究
摘要:聚噻吩具有与导电聚合物相同的良好性能,也具有聚合度可控、特殊情况下制备的纳米纤维强度大于铝等特性,在导电高分子的研究中具有特殊的地位。在测试聚噻吩的一些力学、热学等性能或使用聚噻吩作为应用材料时,通常需要考虑其使用寿命。聚噻吩的杨氏模量、尺寸效应、拉伸强度、黏附力等机械性能与其使用寿命密切相关。然而,关于聚噻吩纳米纤维机械性能的相关研究几乎没有,特别是对单根聚噻吩纳米纤维的力学性能(如杨氏模量、黏附力等)没有相关研究报道。因此,本论文对聚噻吩(Pth)纳米纤维的黏附力性能进行了实验研究及分析,为聚合物的工程应用提供了测试数据和理论分析。使用原子力显微镜(AFM),对同一根探针与85-180 nm直径范围的聚噻吩纳米纤维之间的黏附力进行了系统测试。测试结果表明,长度为8-23μm的聚噻吩纳米纤维与探针间的黏附力平均值为107.02±7.06 GPa。经过比较AFM探针与聚噻吩、聚偏氟乙烯纳米纤维和银纳米线等不同纳米纤维间的粘附力测试结果,发现聚噻吩纳米纤维与探针间的黏附力比其他两者较强。
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