Based on the application of alkali lignin polymer modification, not only can the alkali lignin green treatment be realized, but also the dependence on petroleum-based materials can be effectively reduced, and the properties of the modified polymer can be enhanced. Therefore, in this study, α-cinnamon group as the lipophilic group and diethylenetriamine group as the hydrophilic group were successfully introduced into alkali lignin to construct a lignin-based amphiphilic cationic surfactant. The lipophilic group introduced through the amine methylation reaction causes the lignin derivative to form a regular arrangement of lipophilic groups at the oil phase interface, and diethylenetriamine is introduced into the lignin through amine methylation reaction and ketoamine condensation reaction. Effectively enhance the hydrophilicity of the lignin derivative. The characterization of this lignin derivative is accomplished by different methods, such as elemental analysis, Fourier transform infrared spectroscopy (FTIR), proton nuclear magnetic resonance (¹HNMR) and X-ray photoelectron spectroscopy (XPS). The physical and chemical properties of the lignin derivative are tested by testing its stability in acidic solution, Zeta potential, surface tension, critical micelle concentration (CMC) and hydrophilic-lipophilic balance (HLB). Studies have shown that this amphiphilic cationic surfactant obtained by modifying alkali lignin has good performance, which means that it can be used as a W/O emulsion as an asphalt emulsifier, wetting agent, etc.

基于碱木质素聚合物改性的应用，不仅可以实现碱木质素的绿色处理，而且可以有效降低对石油基材料的依赖，可以提高改性聚合物的性能。因此，在本研究中，成功​​地将作为亲脂性基团的α-肉桂基团和作为亲水基团的二亚乙基三胺基团引入了碱性木质素中，从而构建了木质素基两亲性阳离子表面活性剂。通过胺甲基化反应引入的亲脂性基团导致木质素衍生物在油相界面处形成亲脂性基团的规则排列，并且通过胺甲基化反应和酮胺缩合反应将二亚乙基三胺引入木质素中。有效增强木质素衍生物的亲水性。木质素衍生物的表征可通过不同方法完成，例如元素分析，傅立叶变换红外光谱（FTIR），质子核磁共振（¹ HNMR）和X射线光电子能谱（XPS）。木质素衍生物的物理和化学性质通过测试其在酸性溶液中的稳定性，Zeta电位，表面张力，临界胶束浓度（CMC）和亲水亲脂平衡（HLB）进行测试。研究表明，通过改性碱木质素获得的两亲阳离子表面活性剂具有良好的性能，这意味着它可以用作W / O乳液，沥青乳化剂，湿润剂等。