采用原子力显微镜(AFM)对静电纺丝法制备的纳米级聚己酸内酯纤维进行了三点弯曲实验.纳米纤维收集在经光刻处理后带有U型凹槽的硅片上,凹槽的深度为10μm,待测纳米纤维的直轻范围为83nm～800 nm.利用原子力显微镜的探头测量纤维直径并对纤维中点施力获得纤维的力-挠度曲线,结合经典的梁弯曲理论,计算出聚己酸内酯纳米纤维的弹性模量.实验结果显示,当纤维直径减小到某一临界值时,纤维的弹性模量呈现显著增大的趋势,这说明在研究纳米尺度聚己酸内酯纤维的力学性能过程中,需要考虑其尺寸效应.
参考文献
| [1] | Zheng-Ming Huang;Y.-Z. Zhang;M. Kotaki .A review on polymer nanofibers by electrospinning and their applications in nanocomposites[J].Composites science and technology,2003(15):2223-2253. |
| [2] | Hoi-Yan Cheung;Kin-Tak Lau;Tung-Po Lu;David Hui .A critical review on polymer-based bio-engineered materials for scaffold development[J].Composites, Part B. Engineering,2007(3):291-300. |
| [3] | Biresaw G.;Carriere CJ. .Interfacial tension of polycaprolactone/polystyrene blends by the imbedded fiber retraction method[J].Journal of Applied Polymer Science,2002(14):3145-3151. |
| [4] | Yang KS.;Park SH.;Choi YO.;Cho CS. .Fiber formation from semi-interpenetrating polymer networks consisting of polycaprolactone and a poly(ethylene glycol) macromer[J].Journal of Applied Polymer Science,2002(4):835-841. |
| [5] | E. P. S. Tan;C. T. Lim .Physical properties of a single polymeric nanofiber[J].Applied physics letters,2004(9):1603-1605. |
| [6] | 原波,王珺,韩平畴,林水德.聚己酸内酯纳米纤维的拉伸试验及表面表征[J].高分子材料科学与工程,2008(11):126-129. |
| [7] | Miller R. E.;Shenoy V. B. .Size-dependent elastic properties of nanosized structural elements[J].Nanotechnology,2000(3):139-147. |
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