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Elastic properties of electrospun PVDF nanofibrous membranes: Experimental investigation and numerical modelling using pixel-based finite element method
Polymer Testing ( IF 5.0 ) Pub Date : 2020-01-01 , DOI: 10.1016/j.polymertesting.2019.106218
M.S. Sukiman , A. Andriyana , B.C. Ang , H.S.C. Metselaar

Abstract In this paper, experimental investigation and numerical modelling of the mechanical properties of polyvinylidene fluoride (PVDF) nanofibrous membranes produced by electrospinning are addressed. Membranes with three different diameters are fabricated by adjusting the needle-collector distance during electrospinning. The fiber morphology and the physical properties of the resulting membranes are investigated using Scanning Electron Microscopy (SEM) while their elastic properties are probed using conventional tensile tests. It is found that the membrane with the largest nanofiber diameters are filled with large beads while the contrary is found in the membrane with the smallest nanofiber diameter. Consequently, the membrane with the smallest nanofiber diameter yielded the highest membrane Young's modulus thanks to better fiber packing and higher crystallinity in the nanofibers. Next, the experimental results serve as basis for a pixel-based finite element method (FEM) which is applied directly on the SEM images of the membranes. This technique has the advantage of providing estimations of mechanical properties from the real structure of the membranes. Two parameters are needed for this linear elastic analysis: the elastic modulus of a single fiber and the fiber percentage in the membrane. Results show that the model predictions are in good agreement with experimental data. These results suggest that the pixel-based FEM could be a promising nondestructive alternative to the conventional tensile tests.

中文翻译:

静电纺 PVDF 纳米纤维膜的弹性特性:使用基于像素的有限元方法的实验研究和数值建模

摘要 在本文中,通过静电纺丝生产的聚偏二氟乙烯 (PVDF) 纳米纤维膜的机械性能的实验研究和数值模拟得到解决。通过在静电纺丝过程中调整针收集器距离来制造具有三种不同直径的膜。使用扫描电子显微镜 (SEM) 研究所得膜的纤维形态和物理特性,同时使用常规拉伸试验探测它们的弹性特性。发现具有最大纳米纤维直径的膜填充有大珠子,而在具有最小纳米纤维直径的膜中发现相反。因此,具有最小纳米纤维直径的膜产生最高的膜杨氏 由于纳米纤维中更好的纤维堆积和更高的结晶度,s 模量。接下来,实验结果作为基于像素的有限元方法 (FEM) 的基础,该方法直接应用于膜的 SEM 图像。这种技术的优点是可以根据膜的真实结构估计机械性能。这种线性弹性分析需要两个参数:单根纤维的弹性模量和膜中的纤维百分比。结果表明,模型预测与实验数据吻合良好。这些结果表明,基于像素的 FEM 可能是传统拉伸试验的有前途的无损替代方案。实验结果作为基于像素的有限元方法 (FEM) 的基础,该方法直接应用于膜的 SEM 图像。这种技术的优点是可以根据膜的真实结构估计机械性能。这种线性弹性分析需要两个参数:单根纤维的弹性模量和膜中的纤维百分比。结果表明,模型预测与实验数据吻合良好。这些结果表明,基于像素的 FEM 可能是传统拉伸试验的有前途的无损替代方案。实验结果作为基于像素的有限元方法 (FEM) 的基础,该方法直接应用于膜的 SEM 图像。这种技术的优点是可以根据膜的真实结构估计机械性能。这种线性弹性分析需要两个参数:单根纤维的弹性模量和膜中的纤维百分比。结果表明,模型预测与实验数据吻合良好。这些结果表明,基于像素的 FEM 可能是传统拉伸试验的有前途的无损替代方案。这种线性弹性分析需要两个参数:单根纤维的弹性模量和膜中的纤维百分比。结果表明,模型预测与实验数据吻合良好。这些结果表明,基于像素的 FEM 可能是传统拉伸试验的有前途的无损替代方案。这种线性弹性分析需要两个参数:单根纤维的弹性模量和膜中的纤维百分比。结果表明,模型预测与实验数据吻合良好。这些结果表明,基于像素的 FEM 可能是传统拉伸试验的有前途的无损替代方案。
更新日期:2020-01-01
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