Layer by layer deposition of polyethylenimine and bio-based polyphosphate on ammonium polyphosphate: A novel hybrid for simultaneously improving the flame retardancy and toughness of polylactic acid
Layer by layer deposition of polyethylenimine and bio-based polyphosphate on ammonium polyphosphate: A novel hybrid for simultaneously improving the flame retardancy and toughness of polylactic acid
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DOI：
10.1016/j.polymer.2016.12.008
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发表时间：
2017-01-13
期刊：
影响因子：
4.6
通讯作者：
Fang, Zhengping
中科院分区：
文献类型：
--
作者：
Jing, Jian;Zhang, Yan;Fang, Zhengping
本研究提出了一种利用植物资源制备具有核/壳结构的新型生物基杂化材料（BBH）的方法。本文开发的BBH包括聚磷酸铵（APP）的无机核，其覆盖有有机壳，所述有机壳通过新型生物基聚磷酸铵（BPE）和聚乙烯亚胺（PEI）的逐层组装而构建。BBH可以同时提高聚乳酸（PLA）的阻燃性和韧性，具有非常高的效率。阻燃PLA复合材料在BBH含量为10wt%时可通过UL 94 V0等级。高效的阻燃性能是由于其在气相和冷凝相中的有效性。更重要的是，含有10重量% BBH的阻燃PLA复合材料表现出韧性断裂，断裂伸长率为27.3%，远高于纯PLA的断裂伸长率（8%）。BBH周围PLA基体的脱粘和塑性空洞变形是韧性增强的原因。该研究为开发高效多功能阻燃剂和拓宽可再生资源的应用领域提供了重要的思路。(C)2016爱思唯尔有限公司版权所有
In this study, a facile approach to fabricate a novel bio-based hybrid (BBH) with core/shell structure is presented by taking advantage of plant-derived resources. The BBH developed herein comprises of an inorganic core of ammonium polyphosphate (APP), covered with an organic shell that is constructed via layer-by-layer assembly of a novel bio-based polyelectrolyte (BPE) and polyethylenimine (PEI). BBH can simultaneously enhance the flame retardancy and toughness of polylactic acid (PLA) with very high efficiency. The flame retardant PLA composite can pass UL94 V0 rating at the BBH loading content of 10 wt%. The efficient flame retardant performance is due to its effectiveness in both gas and condensed phases. More importantly, the flame retardant PLA composite containing 10 wt% BBH exhibits ductile fracture with an elongation at break of 27.3%, which is much higher than that of neat PLA (8%). The debonding and plastic void deformation of the PLA matrix around the BBH are responsible for the enhanced toughness. This work provides important hints for devising highly efficient multifunctional flame retardant and broadening the application field of renewable resources. (C) 2016 Elsevier Ltd. All rights reserved.