摘要
在二甲基亚砜(DMSO)插层处理的基础上,利用高岭土以熔融复合的方式改性煤沥青,并研究高岭土的结构状态、煤沥青的老化机理和改性煤沥青的抗老化性能.X射线衍射结果表明:熔融复合过程中高岭土实现了层剥离,透射电镜观察到高岭土在煤沥青基体中呈薄片分散状态.煤沥青氧化是老化的关键,高岭土可能以阻隔空气和延缓传输的方式减少并有效控制了老化反应.与原煤沥青相比,改性煤沥青老化后亚甲基含量增幅降低了42.8%,亚砜基含量增幅降低了32.4%.老化试验进一步证实了高岭土的改性效果,6.0%(质量分数)掺量下针入度比为50.4%,而未改性煤沥青的针入度比仅为35.3%.
The kaoline was intercalated with dimethyl sulfoxide（DMSO）under ultrasonic field,and then utilized to modify raw coal tar pitch by means of melting composite.The structure of intercalated kaoline,aging mechanism and the anti-aging performance of modified coal tar pitch were investigated.The results of X-ray diffraction show that the kaoline is delaminated after composited with coal tar pitch.In the transmission electron microscopy images of coal tar pitch substrate,the delaminated kaoline are uniformly dispersed in the form of thin layers.Oxidation is the key aging factor for coal tar pitch,and the delaminated kaoline may weaken the aging reactions in the way of obstructing air access and delaying air transmission.Compared with raw coal tar pitch,the increasing extent of methylene content is reduced by 42.8%,and the sulfoxide content is reduced by 32.4%for modified coal tar pitch.The aging tests exhibit that the penetration ratio is 50.4% when dosage of the intercalated kaoline is 6.0% while that is 35.3%for raw coal tar pitch,which further confirms the modifying effect of kaoline.
作者
韩双福
高丽雅
刘晓莉
宋永刚
张福强
HAN Shuangfu GAO Liya LIU Xiaoli SONG Yonggang ZHANG Fuqiang(School of Chemical Engineering and Technology, Hebei University of Technology, 300130 Tianjin Hebei Tongda Petrochemical Company Limited, 062450 Cangzhou, Hebei Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, 300130 Tianjin)
出处
《煤炭转化》
CAS
CSCD
北大核心
2017年第4期57-62,共6页
Coal Conversion
基金
河北省科技计划项目(14274101D)
河北省高等学校科学技术研究项目(ZD2014090)
关键词
高岭土插层
层剥离
改性煤沥青
抗老化
层状结构
道路沥青
kaoline intercalation
delamination
modified coal tar pitch
anti-aging
layered structure
road asphalt
