Flame-retardant and tough poly(lactic acid) with well-preserved mechanical strength via reactive blending with bio-plasticizer and phosphorus derivative

IF 6.7 2区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Today Chemistry Pub Date : 2024-08-17 DOI:10.1016/j.mtchem.2024.102252

Zimeng Zhang, Siqi Huo, Guofeng Ye, Cheng Wang, Qi Zhang, Zhitian Liu

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引用次数: 0

Abstract

With sustainable development, advanced poly(lactic acid) (PLA) with superior toughness and flame retardancy is highly demanded in various industries, but the current design strategies often fail to achieve such bioplastics. In this work, flame-retardant and tough PLA bioplastics with well-preserved thermal stability and mechanical strength and enhanced UV resistance and soil degradation are prepared by solvent-free, reactive blending of PLA, bio-based epoxidized soyabean oil (ESO) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO). With the introduction of 10.0 wt% ESO and 3.0 wt% DOPO, the resultant PLA/10E/3D bioplastic has a high tensile strength of 52.8 MPa, with 26.3 times and 67.5 % increases in elongation at break and impact strength compared to those of PLA due to the toughening effect of ESO and the rigid structure of DOPO. The superior toughness of PLA/10E/3D enables it to outperform previous flame-retardant PLA counterparts. PLA/10E/3D achieves a vertical burning (UL-94) V-0 classification and a limiting oxygen index (LOI) of 27.5 %, indicative of satisfactory flame retardancy. Compared with PLA, PLA/10E/3D maintains high thermal stability and shows significantly enhanced UV-protecting and soil degradation properties. Therefore, this work delivers a green and scalable reactive processing method to create flame-retardant, tough yet strong bioplastics with improved soil decomposition and UV resistance, which contributes to sustainable development.

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通过与生物增塑剂和磷衍生物反应共混，生产出具有良好机械强度的阻燃性和韧性聚乳酸

随着可持续发展，各行各业都对具有优异韧性和阻燃性能的高级聚乳酸（PLA）提出了很高的要求，但目前的设计策略往往无法实现这种生物塑料。本研究通过将聚乳酸、生物基环氧大豆油（ESO）和 9,10-二氢-9-氧杂-10-磷菲-10-氧化物（DOPO）进行无溶剂反应共混，制备出阻燃且坚韧的聚乳酸生物塑料，该塑料具有良好的热稳定性和机械强度，并增强了抗紫外线能力和土壤降解能力。在引入 10.0 wt% 的 ESO 和 3.0 wt% 的 DOPO 后，由于 ESO 的增韧作用和 DOPO 的刚性结构，所得到的 PLA/10E/3D 生物塑料的拉伸强度高达 52.8 MPa，断裂伸长率和冲击强度分别是 PLA 的 26.3 倍和 67.5%。聚乳酸/10E/3D 的卓越韧性使其性能超过了以前的阻燃聚乳酸。聚乳酸/10E/3D达到了垂直燃烧（UL-94）V-0级，极限氧指数（LOI）为27.5%，阻燃性能令人满意。与聚乳酸相比，聚乳酸/10E/3D 保持了较高的热稳定性，并显著增强了防紫外线和土壤退化性能。因此，这项工作提供了一种绿色、可扩展的反应加工方法，用于制造阻燃、坚韧且强度高的生物塑料，并改善了土壤分解和抗紫外线性能，有助于实现可持续发展。

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来源期刊

Materials Today Chemistry Multiple-

CiteScore

8.90

自引率

6.80%

发文量

596

审稿时长

33 days

期刊介绍： Materials Today Chemistry is a multi-disciplinary journal dedicated to all facets of materials chemistry. This field represents one of the fastest-growing areas of science, involving the application of chemistry-based techniques to the study of materials. It encompasses materials synthesis and behavior, as well as the intricate relationships between material structure and properties at the atomic and molecular scale. Materials Today Chemistry serves as a high-impact platform for discussing research that propels the field forward through groundbreaking discoveries and innovative techniques.