摘要
为提升三聚氰胺(MEL)阻燃体系在环氧树脂(EP)中的效率,本研究构建了基于植酸(PA)-壳聚糖(CS)-锰(Mn)的多功能阻燃增强体系,并与MEL协同应用于EP。系统考察了PA-CS-Mn质量分数对EP阻燃、抑烟和减毒性能的影响,并结合炭层形貌、化学组成及气相产物分析探讨阻燃机理。结果表明,PA-CS-Mn的引入显著提升了EP的阻燃性,其中EP/15PA-CS-Mn(质量分数15%的PA-CS-Mn以及质量分数15%的MEL与EP的复合材料)的热释放速率峰值(PHRR)和热释放总量(THR)分别为104.3 kW/m^(2)和21.9 MJ/m^(2),较纯EP下降88.0%和61.4%;烟释放速率峰值(PSPR)和烟释放总量(TSP)较纯EP分别降低69.2%和64.4%。机理分析表明,PA-CS-Mn在凝聚相促进形成致密富碳炭层,并在气相捕获燃烧自由基,两者协同抑制热释放与烟产生。本研究为开发高效、环保的EP阻燃体系提供了新思路。
To enhance the flame-retardant efficiency of melamine(MEL)in epoxy resins(EPs),a multifunctional phosphorus-nitrogen-metal system based on phytic acid(PA),chitosan(CS),and manganese(Mn)was constructed and synergistically applied with MEL.The effects of the PA-CS-Mn mass fraction on the flame retardancy,smoke suppression,and toxicity reduction of EP were systematically investigated.The flame-retardant mechanism was elucidated by analyzing the char morphologies,chemical compositions,and gaseous products.Results show that the incorporation of PA-CS-Mn significantly improves the flame retardancy of EP.The peak heat release rate(PHRR)and total heat release(THR)of EP/15PA-CS-Mn(a composite material of EP with a 15%mass fraction PA-CS-Mn and a 15%mass fraction MEL)are respectively 104.3 kW/m^(2)and 21.9 MJ/m^(2),which decreased by 88.0%and 61.4%compared to pure EP.Compared to pure EP,the peak smoke production rate(PSPR)and total smoke production(TSP)are also respectively reduced by 69.2%and 64.4%.Mechanistic analysis reveals that PA-CS-Mn could promote the formation of dense,carbon-rich char layers in the condensed phase and scavenge combustion radicals in the gas phase,synergistically inhibiting heat release and smoke generation.This work provides a promising strategy for developing efficient and environmentally friendly flame-retardant systems for EP.
作者
张青海
王小君
陈汝盼
欧阳娜
ZHANG Qinghai;WANG Xiaojun;CHEN Rupan;OUYANG Na(New Materials and Shoes&Clothing Engineering,Liming Vocational University School,Quanzhou 362000,China)
出处
《塑料工业》
北大核心
2025年第12期156-163,169,共9页
China Plastics Industry
基金
福建省中青年教师教育科研项目(JAT210877)
差别化纤维及功能性鞋服面料研究中心项目(LMPT202301)。
关键词
环氧树脂
植酸
壳聚糖
三聚氰胺
协同阻燃
Epoxy Resin
Phytic Acid
Chitosan
Melamine
Synergistic Flame Retardancy
