摘要
利用光聚合法将甲基丙烯酸缩水甘油酯(GMA)接枝于亚麻织物(Flax),制备改性亚麻纤维(Flax-gGMA),利用乙二胺对Flax进行胺化处理,利用磷酸对Flax进行磷酸化处理,通过手糊成型法制备环氧树脂/亚麻纤维(EP/Flax-g-GMA)复合材料。对不同反应阶段的Flax进行红外(FTIR)表征,对EP/Flax-g-GMA进行扫描电镜(SEM)、力学性能和阻燃性能等测试。结果表明:GMA成功接枝于Flax表面,改善Flax和EP的相容性。当浓度为25%的GMA接枝Flax,EP/Flax-g-25%GMA具有最佳的综合性能,其拉伸强度、弯曲强度以及冲击强度分别为44.42 MPa、101.20 MPa和5.82 kJ/m^(2),均高于纯EP以及未改性Flax填充的环氧树脂复合材料。GMA改性Flax的加入有效提高EP复合材料的阻燃性能,EP/Flax-g-25%GMA的极限氧指数(LOI)值达到30.18%,热释放速率峰值(PHRR)为659.08 kW/m^(2),具有优异的阻燃性能。
Glycidyl methacrylate(GMA)was grafted onto flax fabric(Flax)by photopolymerization to prepare modified flax fiber(Flax-g-GMA),Flax was aminate with ethylenediamine,and phosphoric acid was used to Flax is phosphorylated.The epoxy resin/flax fiber(EP/Flax-g-GMA)composites were prepared by hand-paste method.The Flax at different reaction stages was characterized by infrared(FTIR),and the EP/Flax-g-GMA was tested by scanning electron microscopy(SEM),mechanical properties and flame retardancy.The results show that GMA is successfully grafted on the surface of Flax to improve the compatibility of Flax and EP.When the concentration of GMA is 25%,EP/Flax-g-25%GMA has the best comprehensive properties.The tensile strength,flexural strength and impact strength of EP/Flax-g-25%GMA are 44.42 MPa,101.20 MPa and 5.82 kJ/m~2,respectively,which are higher than those of pure EP and unmodified Flax filled epoxy resin composites.The addition of GMA modified Flax can effectively improve the flame retardancy of EP composites.The LOI value of EP/Flax-g-25%GMA reaches 30.18%,and the peak heat release rate(PHRR)is 659.08 kW/m~2,which has excellent flame retardancy.
作者
张蕾
ZHANG Lei(Jiangsu Union Technical Institute Suzhou Branch,Suzhou 215004,China)
出处
《塑料科技》
CAS
北大核心
2022年第4期36-40,共5页
Plastics Science and Technology
关键词
亚麻纤维
环氧树脂
阻燃性能
力学性能
接枝改性
Flax fiber
Epoxy resin
Flame retardancy
Mechanical properties
Grafting modification
