聚乳酸
材料科学
磨损(机械)
三氯生
扫描电子显微镜
复合材料
极限抗拉强度
皱纹
聚氨酯
傅里叶变换红外光谱
生物污染
化学工程
热塑性聚氨酯
聚合物
弹性体
膜
化学
生物化学
医学
工程类
病理
作者
Yue Zhang,Tingting Li,Bing‐Chiuan Shiu,Fei Sun,Haitao Ren,Xuefei Zhang,Ching‐Wen Lou,Jia‐Horng Lin
标识
DOI:10.1016/j.jclepro.2020.124455
摘要
Medical product contamination can seriously threaten patients’ health. Because of severe pollution, nonwoven medical covers still face lots of challenges, especially in terms of versatile protection performance. The application of biodegradable polylactic acid (PLA) fiber has been limited by the single hydrophilicity and poor mechanical performance. Herein, a low cost and large-scale PLA/low-melt (polylactic acid) LMPLA-thermoplastic polyurethane (TPU)/triclosan nonwovens was prepared through needle punch-pad-coat method. As observed as by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and Fourier transform infrared spectroscopy (FT-IR) analyses, a membrane structure was formed on the PLA/LMPLA nonwovens surface, which dramatically improved the waterproof, antimicrobial, mechanical and abrasion resistant performance and imparted relative high breathability. By varying the stroke frequency as well as the triclosan concentration, the modified nonwovens with 0.1 wt% triclosan displayed excellent water repellency (90%), modest breathability (136.9 mm/s), robust tensile strength (12.72 MPa), and good antimicrobial performance against Staphylococcus aureus and Escherichia coli. Furthermore, abrasion resistant property could reach 10000 continuous abrasion cycles, up to 10-fold and 50% higher than that of the control fabric and previous reported PU nonwoven. These results are of great significance for the design of low cost, eco-friendly, sustainable, and mass production of medical products.
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