本发明公开了一种黑液木质素基环氧薄膜复合材料及制备方法，属于制浆黑液综合利用技术领域。该方法以黑液木质素为原料，与甲醛水溶液和二乙烯三胺反应，真空脱水，再与双酚A型环氧树脂反应，制备获得黑液木质素基环氧树脂薄膜复合材料。本发明以黑液木质素为原料，制备获得黑液木质素基环氧树脂薄膜复合材料，与石油基酚醛胺制备的环氧树脂薄膜相比，该黑液木质素基环氧树脂薄膜复合材料的拉伸强度获得大幅度提高，为12.0～25.8MPa，且在黑液木质素基环氧树脂薄膜复合材料中含有分布均匀的无机物，如Si、Ca、Na、S等，有效解决环境污染问题，并实现黑液高值化全利用，具有很好的实用性。

The present invention discloses a black liquor lignin based epoxy film composite material and a preparation method, belonging to the technical field of comprehensive utilization of pulping black liquor. This method uses black liquor lignin as the raw material, reacts with formaldehyde aqueous solution and diethylenetriamine, vacuum dehydrates, and then reacts with bisphenol A epoxy resin to prepare black liquor lignin based epoxy resin film composite materials. The present invention uses black liquor lignin as the raw material to prepare a black liquor lignin based epoxy resin film composite material. Compared with the epoxy resin film prepared from petroleum based phenolic amine, the tensile strength of the black liquor lignin based epoxy resin film composite material is significantly improved, ranging from 12.0 to 25.8 MPa, and there are uniformly distributed inorganic substances such as Si, Ca, Na, S, etc. in the black liquor lignin based epoxy resin film composite material, Effectively solving environmental pollution problems and achieving high value full utilization of black liquor have good practicality.