College of Materials Science and Engineering, State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, PR China.
College of Materials Science and Engineering, State Key Laboratory of New Textile Materials and Advanced Processing Technologies, Wuhan Textile University, Wuhan 430200, PR China.
Carbohydr Polym. 2022 Dec 15;298:120141. doi: 10.1016/j.carbpol.2022.120141. Epub 2022 Sep 22.
As a very promising biodegradable polymer, polylactic acid (PLA) has been applied in various fields. Unfortunately, the disadvantages of flammability and large amounts of molten droplets limit its application. In this work, we constructed a novel flame-retardant system by combining the as-prepared bio-based chitosan derivative (CS-TE) and aluminum hypophosphite (AP), and used it to improve the flame retardancy and anti-dripping property. When 3.75 wt% CS-TE and 11.25 wt% AP were incorporated into PLA, the PLA composite had a limiting oxygen index of 28.5 % and achieved a UL-94 V-0 rating as well as showed excellent anti-dripping behavior. Meanwhile, the peak heat release rate and total smoke production decreased by 52.3 % and 73.4 % respectively.
作为一种很有前途的可生物降解聚合物，聚乳酸（PLA）已被应用于各个领域。然而，其易燃性和大量熔融液滴的缺点限制了它的应用。在这项工作中，我们通过将制备的生物基壳聚糖衍生物（CS-TE）和次磷酸铝（AP）结合，构建了一种新型的阻燃体系，并用其来提高阻燃性和抗滴落性。当 3.75wt% CS-TE 和 11.25wt% AP 被加入到 PLA 中时，PLA 复合材料的氧指数达到 28.5%，并达到 UL-94 V-0 等级，同时表现出优异的抗滴落性能。此外，最大热释放速率和总烟雾释放量分别降低了 52.3%和 73.4%。
