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首页> 外文会议>88th Textile Institute world conference 2012 : Bridging innovation, research and enterprise >Degradable Behaviors of PLA Nonwovens by UV-Ray Irradiation
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Degradable Behaviors of PLA Nonwovens by UV-Ray Irradiation

机译：紫外线辐射对PLA无纺布的降解行为

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摘要

Recently, environmental pollution caused by synthetic material wastes has become a serious global issue. Accordingly, the industrial application of biodegradable polymers, such as poly(lactic acid) (PLA), poly(caprolactone) (PCL), poly(hydroxyl butyrate) (PHB), and poly(butylenes succinate) (PBS) has gradually increased, and has been intensively studied as substitutes for non-degradable polymers. This study aims to investigate the effect of ultra-violet (UV) irradiation on the surface morphology and physical properties of PLA nonwovens, which have been fabricated using the needle-punch technique. The morphology, thermal, and mechanical properties of the PLA nonwovens exposed via UV-ray were examined through scanning electron microscopy (SEM), differential scanning calorimeter (DSC), thermo gravimetric analysis (TGA), and tensile tester. The results showed that the weight loss and strength properties of PLA needle-punched nonwovens significantly decreased with increasing UV-ray irradiation time. Moreover, the crystallinity change showed that the degradation of PLA nonwovens through UV-ray irradiation proceeded via surface/bulk erosion mechanism.
机译：近来，由合成材料废物引起的环境污染已成为严重的全球性问题。因此，可生物降解的聚合物，例如聚乳酸（PLA），聚己内酯（PCL），聚羟基丁酸酯（PHB）和聚丁二酸丁二酸酯（PBS），在工业上的应用已逐渐增加，并且已经被广泛研究作为不可降解聚合物的替代品。这项研究的目的是研究紫外线（UV）对使用针刺技术制造的PLA无纺布的表面形态和物理性能的影响。通过扫描电子显微镜（SEM），差示扫描量热仪（DSC），热重分析（TGA）和拉伸测试仪检查了通过紫外线暴露的PLA无纺布的形态，热和机械性能。结果表明，PLA针刺无纺布的重量损失和强度性能随着紫外线照射时间的增加而显着降低。此外，结晶度变化表明，PLA无纺布通过紫外线辐射的降解是通过表面/本体腐蚀机理进行的。

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