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Effect of tungsten disulfide (WS_2) nanotubes on structural, morphological and mechanical properties of poly(L-lactide) (PLLA) films

机译:钨二硫化物(WS_2)纳米管对聚(L-丙交酯)(PLLA)膜的结构,形态学和力学性能的影响

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Poly(L-lactide) (PLLA) is a semicrystalline, biocompatible and biodegradable polymer widely employed in many applications (food packaging, biomedical devices, drug delivery systems). This work deals with nanocomposites of PLLA and tungsten disulfide (WS_2) nanotubes (NTs) as a novel material to obtain thinner and stronger bioresorbable vascular scaffolds. We studied the influence of WS_2 NTs on the mechanical properties of PLLA-WS_2 films. Polarized optical microscopy reveals a high degree of orientation of the polymer molecules in stretched films that further increases with a post-stretching annealing treatment. At the same time, X-ray diffraction (XRD) and Raman spectroscopy confirm enhancement of the crystallinity induced by the WS_2 NTs.
机译:聚(L-丙交酯)(PLLA)是广泛用于许多应用(食品包装,生物医学装置,药物递送系统)的半结晶,生物相容性和可生物降解的聚合物。该工作涉及PLLA和钨二硫化物(WS_2)纳米管(NTS)的纳米复合材料作为新的材料,以获得更薄和更强的生物可吸收的血管支架。我们研究了WS_2NTS对PLLA-WS_2薄膜力学性能的影响。偏振光显微镜显露在拉伸薄膜中揭示了聚合物分子的高度取向,其进一步随着后拉伸退火处理而进一步增加。同时,X射线衍射(XRD)和拉曼光谱证实了WS_2 NTS诱导的结晶度的增强。

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