仿生矿化改性废弃PAN纤维对SBS沥青低温抗裂性能的影响  

Research on low-temperature crack resistance of SBS asphalt modified by biomimetic mineralization of waste PAN fibers

作　　者：韩付虎 任登辉 王佩辉 赖芳[1] 李晶[1,2] HAN Fuhu;REN Denghui;WANG Peihui;LAI Fang;LI Jing(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;Key Laboratory of New Low-carbon Green Chemical Technology,Education Department of Guangxi Zhuang Autonomous Region,Nanning 530004,China)

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西壮族自治区教育厅低碳绿色化工新技术重点实验室,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2024年第5期964-976,共13页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金项目(52368057)。

摘　　要：为了研究废弃聚丙烯腈纤维(PAN)作为SBS复合改性沥青增强剂的可行性,提高SBS复合改性沥青的低温抗裂性能,促进“双碳”战略的实施和可持续发展,采用仿生矿化方法对废弃聚丙烯腈纤维进行改性处理,并将其与SBS复合于沥青中,制备新型复合改性沥青。扫描电子显微镜和X射线荧光分析仪分析表明,纤维表面成功构建了仿生结构,并确认了仿生矿化改性纤维(HP-PAN)的粗糙表面。纤维表面的仿生矿化结构作为沥青中的缓冲器,增强了纤维和沥青之间的相互作用。动态流变剪切和拉伸试验表明,HP-PAN/SBS改性沥青比PAN/SBS改性沥青表现出更好的黏弹性、抗车辙性和拉伸性能,并且在废弃聚丙烯腈纤维的添加量质量分数为2%时,复合改性沥青的性能最好,其低温抗裂性能相较于普通沥青提高了146.94%。To investigate the feasibility of utilizing waste polyacrylonitrile(PAN)fibers as reinforcing agents in SBS composite modified asphalt to enhance its low-temperature crack resistance,and to promote the implementation of the“dual carbon”strategy and sustainable development,a biomimetic mineralization method was employed to modify the waste PAN fibers.These modified fibers were then compounded with SBS and incorporated into the asphalt to produce a novel composite modified asphalt.Analysis conducted using scanning electron microscopy and X-ray fluorescence spectrometry confirmed the successful construction of a biomimetic structure on the fiber surface and verified the rough surface of the HP-PAN fibers.The biomimetic mineralization structure on the fiber surface acted as a buffer in the asphalt,enhancing the interaction between the fibers and the asphalt.Dynamic rheological shear and tensile tests demonstrated that the HP-PAN/SBS modified asphalt exhibited superior viscoelasticity,resistance to rutting,and tensile properties compared to PAN/SBS modified asphalt.Furthermore,at an addition rate of 2%of waste polyacrylonitrile fibers,the composite modified asphalt demonstrated the best performance,with its low-temperature crack resistance improving by 146.94%compared to regular asphalt.

关 键 词：废弃聚丙烯腈纤维 SBS改性沥青 可持续发展 仿生矿化 

分 类 号：U414[交通运输工程—道路与铁道工程]