壳聚糖/植酸钠包覆聚磷酸铵复合物对聚乳酸复合材料阻燃性能的影响

›› 2023, Vol. 37 ›› Issue (5): 62-68.

壳聚糖/植酸钠包覆聚磷酸铵复合物对聚乳酸复合材料阻燃性能的影响

陈小明¹,梁国祺¹,张峻豪¹,辛菲²,唐武飞¹

1. 湖南科技学院
2. 北京工商大学材料与机械工程学院材料科学与工程系

收稿日期:2023-02-06 修回日期:2023-02-23 出版日期:2023-05-26 发布日期:2023-05-26
基金资助:
北京工商大学高分子材料无卤阻燃剂工程实验室开放课题

Effect of chitosan/sodium phytate-coated ammonium polyphosphate on flame retardancy of poly（lactic acid）

Received:2023-02-06 Revised:2023-02-23 Online:2023-05-26 Published:2023-05-26
Supported by:
Open Project Program of Engineering Laboratory of Non halogen Flame Retardants for Polymers

摘要/Abstract

摘要： 通过包覆技术用生物基材料壳聚糖（CS）和植酸钠（PA-Na）依次改性聚磷酸铵（APP），获得包覆APP（MCAPP），通过红外光谱仪（FTIR）、热重分析仪（TG）和冷场发射扫描电子显微镜（SEM）等对其进行表征和分析；通过熔融共挤出，将其应用于聚乳酸（PLA）复合材料中，以改善PLA阻燃性能。结果表明，相比于纯PLA，7.5 %（质量分数，下同） MCAPP（CS与APP质量比为1/2）可有效改善PLA的阻燃性能和成炭能力，热释放速率峰值（pHRR）由654 kW/m2降至469 kW/m2，残炭率由0.37 %提升至6.85 %。

关键词: 阻燃, 生物基, 聚乳酸, 聚磷酸铵

Abstract: Ammonium polyphosphate （APP） was modified with chitosan （CS） and then with sodium phytate （PA-Na） to obtain coated APP （MCAPP）. MCAPP was characterized and analyzed by using infrared spectrometer， thermogravimetric analyzer， and cold field emission scanning electron microscope， etc. The as-prepared MCAPP was then used to prepare poly（lactic acid） composites through melt co-extrusion to enhance their flame-retardant performance. The results indicated that the addition of 7.5 wt% MCAPP at a CS/APP mass ratio of 1/2 could improve the flame retardancy and carbon formation capacity of the composites effectively. The peak-heat-release rate of the composites decreased from 654 to 469 kW/m2， and their residual carbon rate increased from 0.37 % to 6.85 %.

Key words: flame retardant, biomass-base, poly（lactic acid）, ammonium polyphosphate

陈小明梁国祺张峻豪辛菲唐武飞. 壳聚糖/植酸钠包覆聚磷酸铵复合物对聚乳酸复合材料阻燃性能的影响[J]. , 2023, 37(5): 62-68.

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