改性木质素磺酸钠沥青乳化剂的合成及应用性能  

Synthesis and performance of modified sodium lignosulfonate asphalt emulsifier

作　　者：李学凡 唐新德 郭海超[1] 王鑫砚 马菲 晁亚楠 LI Xuefan;TANG Xinde;GUO Haichao;WANG Xinyan;MA Fei;CHAO Ya'nan(School of Civil Engineering,Shandong Jiaotong University,Ji'nan 250357,China;Institute of Intelligent Transportation,Shandong Jiaotong University,Ji'nan 250357,China)

机构地区：[1]山东交通学院交通土建工程学院,山东济南250357 [2]山东交通学院智慧交通研究院,山东济南250357

出　　处：《新型建筑材料》2024年第1期70-73,共4页New Building Materials

基　　金：山东省自然科学基金项目(ZR2022ME135);山东省重点研发计划项目(2017GGX20128)。

摘　　要：为提高木质素磺酸钠的乳化性能,以H2O2/Vc构成的氧化还原体系作为引发剂,采用接枝聚合制备了一种改性木质素磺酸钠沥青乳化剂,探讨了反应条件对其低温延度的影响,并采用傅里叶变换红外光谱对改性前后木质素磺酸钠的分子结构进行表征,测试了其乳化性能,使用激光粒度仪对乳化沥青的粒径进行测试。结果表明,当n(丙烯酸)∶n(三乙烯四胺)=1∶1、m(丙烯酰胺类单体)∶m(木质素磺酸钠)=1∶1、引发剂用量占单体总质量的1%时,制备的改性木质素磺酸钠效果最佳,由其制备的乳化沥青低温延度达72.3 cm,5 d贮存稳定性达1.2%,相较于未改性前有较大的提升。To improve the emulsification performance of sodium lignosulfonate,a modified sodium lignosulfonate asphalt emulsifier was prepared by grafting polymerization using an oxidation-reduction system composed of hydrogen peroxide/vitamin C(Vc)as the initiator.The effects of the reaction conditions on its low-temperature ductility were studied.The molecular structure of modified sodium lignosulfonate before and after modification was characterized by Fourier transform infrared spectroscopy,its emulsification performance was tested,and the particle size of emulsified asphalt was measured by laser particle size analyzer.The results showed that when the molar ratio of acrylic acid to triethylenetetramine is 1∶1,the mass ratio of sodium lignosulfonate to amide intermediate is 1∶1,and the amount of initiator accounts for 1%of the total monomer mass,the modified sodium lignosulfonate has the best effect.The low-temperature ductility of the emulsified asphalt prepared from it can reach 72.3 cm,and the 5 d storage stability can reach 1.2%,which is significantly improved compared to the unmodified asphalt.

关 键 词：木质素磺酸钠 沥青乳化剂 改性 接枝共聚 

分 类 号：TU535[建筑科学—建筑技术科学]