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将玉米秸秆酶解木质素和双酚A环氧树脂共混,利用低相对分子质量聚酰胺作为固化剂,采用热压工艺制备了一种木粉增强的交联型木质素/环氧树脂复合材料,研究了热压温度、热压压力以及木粉的加入对复合材料力学性能的影响。研究结果表明,随着热压温度和热压压力的增加,木粉增强木质素/环氧树脂复合材料的弯曲强度和冲击强度均先升高而后降低,在120℃热压温度、8MPa热压压力下复合材料的力学性能达到最佳。随着木粉含量的增加,复合材料的弯曲强度和冲击强度均升高;木粉的粒径也对复合材料的力学性能有较大影响;综合考虑复合材料的力学性能,优选加入40～80目的木粉,木粉的含量为20%。
The corn stalk enzymolysis lignin and bisphenol A epoxy resin were blended, the low molecular weight polyamide was used as the curing agent, and a wood flour reinforced crosslinked lignin / epoxy composite The effects of hot pressing temperature, pressing pressure and the addition of wood flour on the mechanical properties of the composites were studied. The results show that with the increase of hot pressing temperature and hot pressing pressure, the flexural strength and impact strength of wood flour-reinforced lignin / epoxy composites increase first and then decrease, and at 120 ℃ hot pressing temperature, 8MPa hot pressing The mechanical properties of composite under pressure to achieve the best. With the increase of wood flour content, the flexural strength and impact strength of the composites increase; the particle size of wood flour also has a greater impact on the mechanical properties of composites; considering the mechanical properties of composites, 40 ~ 80 The purpose of wood flour, wood flour content of 20%.