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采用静电纺丝技术,分别制备了聚乳酸(PLA)与茶多酚(TP)质量混比为100/0、90/10、80/20、70/30、60/40、50/50、40/60、30/70和20/80的复合纳米纤维膜。分别借助扫描电子显微镜(SEM)和KDⅡ-0.05微机控制电子万能试验机观察薄膜表面形貌及测试力学性能。SEM图分析结果表明:当PLA与TP的质量混比从100/0变化到50/50时,均能纺出较连续、光滑的纤维。随着纺丝液中PLA含量的减少,TP含量的增加,所纺纤维直径逐渐变小。超出这个范围,纤维断裂现象加剧,甚至出现纳米级颗粒团聚的现象。复合纳米纤维膜的拉伸强度逐渐减小,断裂伸长率先增加后减小。
The electrospinning technology was used to prepare polylactic acid (PLA) and polyphenols (TP) with mass ratio of 100 / 0,90 / 10,80 / 20,70 / 30,60 / 40,50 / 50,40 / 60, 30/70 and 20/80 composite nanofiber membranes. The surface morphology and mechanical properties of the films were observed by scanning electron microscope (SEM) and KDⅡ-0.05 computer controlled electronic universal testing machine respectively. SEM image analysis results show that when the mass ratio of PLA to TP changes from 100/0 to 50/50, more continuous and smooth fibers can be spun. With the decrease of PLA content in the spinning solution, the content of TP increased and the diameter of the spun fibers became smaller. Beyond this range, the phenomenon of fiber fracture aggravated, and even the phenomenon of nano-particle agglomeration. The tensile strength of the composite nanofiber membrane gradually decreased, the elongation at break increased first and then decreased.