中国塑料2024，Vol.38Issue(10)：29-35,7.DOI:10.19491/j.issn.1001-9278.2024.10.006
硅-铝包覆TiO2功能化SBS改性沥青抗老化机理及性能研究
Study on anti-aging mechanism and performance of asphalt modified with Si-Al coated TiO2-functionalized SBS
摘要
Abstract
In order to better utilize the excellent UV shielding function of nano-TiO2,improve the anti-aging performance of SBS-modified asphalt,and address a difficulty in the dispersion of nano-TiO2 in the SBS-modified asphalt system,the Si-Al coated nano-TiO2 was prepared using a Si-Al coprecipitation method to form the coating film on the surface of nano-TiO2.This approach can effectively prevent the oxidation of SBS-modified asphalt caused by nano-TiO2 due to its photo-catalytic activity and thus enhance the anti-aging performance of nano-TiO2-functionalized SBS-modified asphalt.The coating effect and morphological microstructure of the coated nano-TiO2 were investigated by TEM and XRD,the ultra-violet(UV)absorption capacity of the modified asphalt was analyzed by UV spectrophotometry,the influence of Si-Al coating on the dispersion and stability of nano-TiO2 and SBS was evaluated by SEM and fluorescence microscopy,and the anti-aging mechanism of the Si-Al coated nano-TiO2 functionalized SBS-modified asphalt was analyzed by FTIR spectroscopy.Finally,the performance of the functionalized SBS-modified asphalt was studied.The results indicated that the dispersion and stability of nano-TiO2 and SBS in asphalt were effectively improved when 6 wt%Si-Al coated na-no-TiO2 was incorporated.In this case,the oxidation effect of nano-TiO2 on the modified asphalt could be suppressed,and the anti-aging performance of the SBS-modified asphalt could be improved.关键词
苯乙烯-丁二烯-苯乙烯嵌段共聚物改性剂/纳米二氧化钛/改性沥青/老化性能Key words
styrenic block copolymer/nano titanium dioxide/modified asphalt/aging performance引用本文复制引用
杨喜英,张文才,曲立杰,史文秀..硅-铝包覆TiO2功能化SBS改性沥青抗老化机理及性能研究[J].中国塑料,2024,38(10):29-35,7.基金项目
山西交通控股集团有限公司科技项目(2022-JKKJ-33) （2022-JKKJ-33）
山西工程科技职业大学科技项目(KJ202307) （KJ202307）
