均匀聚多巴胺颗粒的简易制备及其作为可生物降解聚乳酸环保阻燃剂的应用

IF 1.9 4区工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY

Journal of Fire Sciences Pub Date : 2020-11-01 DOI:10.1177/0734904120932479

Benjamin Tawiah, Bin Yu, A. Yuen, B. Fei

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引用次数: 6

摘要

由于可生物降解聚合物本身的“绿色”性质，对环境友好型阻燃剂的需求变得特别必要。本工作报道了本质无毒的聚多巴胺(PDA)颗粒作为一种高效环保的聚乳酸(PLA)阻燃剂。与纯PLA相比，5 wt%的PDA负载导致峰值热释放率降低22%，防火性能指数提高34.7%，二氧化碳排放量降低。UL-94垂直燃烧试验的极限氧指数(LOI)为27.5%，达到V-2等级。随着PDA含量的增加，PLA/PDA复合材料形成了高度聚集的非晶态颗粒炭，与对照PLA相比，PLA/PDA复合材料的热解气态产物显著减少。这项工作为PDA单独作为生物塑料PLA的高效绿色、环保阻燃剂的潜在商业应用提供了重要的见解。

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Facile preparation of uniform polydopamine particles and its application as an environmentally friendly flame retardant for biodegradable polylactic acid

The demand for environmentally benign flame retardants for biodegradable polymers has become particularly necessary due to their inherently “green” nature. This work reports intrinsically non-toxic polydopamine (PDA) particles as an efficient and environmentally friendly flame retardant for polylactic acid (PLA). 5 wt% PDA loading resulted in a 22% reduction in the peak heat release rate, 34.7% increase in the fire performance index, and lower CO2 production compared to neat PLA. A limiting oxygen index (LOI) value of 27.5% and a V-2 rating was achieved in the UL-94 vertical burning test. Highly aggregated amorphous particulate char was formed with the increasing content of PDA, and a significant reduction in evolved pyrolysis gaseous products was achieved for the PLA/PDA composites as compared with control PLA. This work provides important insight into the potential commercial application of PDA alone as an efficiently green, environmentally benign flame retardant for bioplastic PLA.

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来源期刊

Journal of Fire Sciences 工程技术-材料科学：综合

CiteScore

4.00

自引率

0.00%

发文量

审稿时长

2.5 months

期刊介绍： The Journal of Fire Sciences is a leading journal for the reporting of significant fundamental and applied research that brings understanding of fire chemistry and fire physics to fire safety. Its content is aimed toward the prevention and mitigation of the adverse effects of fires involving combustible materials, as well as development of new tools to better address fire safety needs. The Journal of Fire Sciences covers experimental or theoretical studies of fire initiation and growth, flame retardant chemistry, fire physics relative to material behavior, fire containment, fire threat to people and the environment and fire safety engineering. This journal is a member of the Committee on Publication Ethics (COPE).