木质素及其衍生物改性沥青  

Bitumen modification via lignin and its derivatives

作　　者：吴方琰 田宇轩 刘胜利 王雷雷 王海英[1,2] 陈彦广 WU Fangyan;TIAN Yuxuan;LIU Shengli;WANG Leilei;WANG Haiying;CHEN Yanguang(College of Chemistry&Chemical Engineering,Northeast Petroleum University,Daqing 163318,China;Heilongjiang Provincial Key Laboratory of Oil and Gas Chemical Technology,Daqing 163318,China)

机构地区：[1]东北石油大学化学化工学院,黑龙江大庆163318 [2]黑龙江省石油与天然气化工省重点实验室,黑龙江大庆163318

出　　处：《化工科技》2024年第4期17-21,66,共6页Science & Technology in Chemical Industry

基　　金：国家自然科学青年基金项目(1908021);中国石油科技创新基金项目(2021DQ02-0701);东北石油大学引导性创新基金项目(2021YDL-03);东北石油大学人才引进科研启动经费资助项目(2021KQ07)。

摘　　要：通过官能团、形貌、热稳定性和亲疏水性等参数对比筛选出适用于沥青改性的木质素,采用柠檬酸疏水改性处理对其进行表征分析,探索掺入改性前、后木质素的沥青性能变化规律。结果表明,有机溶剂木质素中含有丰富的羟基、表面较为粗糙、热稳定性和疏水性能较好,最佳条件为疏水改性温度130℃,m(柠檬酸)∶m(有机溶剂木质素)=7∶1,酯化率为28.70%。改性后的有机溶剂木质素羟基含量减少,表面比较粗糙,热稳定性良好,疏水性能增强。掺杂改性后有机溶剂木质素沥青的复数剪切模量提高,相位角减小,抗车辙性能提高。By comparing parameters such as functional groups,morphology,thermal stability,and hydrophilicity,suitable lignin for bitumen modification was selected.The lignin was modified by citric acid hydrophobic treatment and then characterized to explore the changes in bitumen performance of lignin before and after modification.The results showed that organosolv lignin contains abundant hydroxyl groups,a rough surface,good thermal stability,and hydrophobic properties.The optimal temperature for hydrophobic modification was 130℃,and the optimal mass ratio of citric acid to lignin was 7∶1.At this condition,the yield was 28.70%.After modification,the hydroxyl content of organosolv lignin decreased,the surface was still relatively rough,the thermal stability was good,and the hydrophobic performance was enhanced.The complex modulus of modification organosolv lignin based bitumen increased,the phase angle decreased and the anti rutting performance improved.

关 键 词：木质素 柠檬酸疏水改性 热稳定性 疏水性能 复数剪切模量 

分 类 号：U414[交通运输工程—道路与铁道工程]