玉米秸秆木质素改性环氧树脂的制备与性能

Preparation and Properties of Epoxy Resin Modified by Corn Stover Lignin

摘要:

将不同含量的玉米秸秆木质素与双酚A环氧树脂混合，于100℃下预处理1小时，用以改性环氧树脂。通过对预处理后环氧树脂的粘度，以及改性环氧树脂与聚酰胺固化后材料的力学性能、动态力学性能、热稳定性以及燃烧性能的分析测试，研究了不同含量的玉米秸秆木质素对改性环氧树脂性能的影响。结果表明，随着木质素含量的增加，改性环氧树脂的粘度增大；环氧树脂固化物的弯曲强度随木质素含量的增加先升高而后降低，但其冲击强度下降；改性环氧树脂固化物的玻璃化转变温度随木质素含量的增加而增加；木质素改性后环氧树脂固化物的热稳定性有所改善，木质素的加入能够改善环氧树脂的阻燃性能。

Abstract:

In this study, different contents of corn stover lignin were used to blend with epoxy resin at 100 oC to modify the epoxy resin. The effect of content of lignin on the properties of the modified epoxy resin was studied by the characterization of the viscosity of modified resin, and the mechanical properties, dynamic mechanical analysis, the thermal stability and the combustion properties for modified resin cured by polyamine. The results show that, with the increase of the content of the lignin, the viscosity of the modified epoxy resin increases, and the bending strength for the cured epoxy resin first increases and then decreases. The impact strength decreases with the increase of the content of lignin. The glass transition temperature for cured epoxy resin increases with increasing the content of lignin, and the thermal stability for modified epoxy resin is also improved. The addition of lignin can improve the flame retardancy of epoxy resin.