摘要
以甲基三氯硅烷(MTS)为改性剂,甲苯为溶剂,采用单因素轮换法对沉淀法白炭黑粉体进行有机改性,以提高其分散性和疏水性能。主要考察了反应温度、时间、MTS浓度对沉淀法制白炭黑的物化结构和性能的影响。使用X射线衍射仪、傅里叶红外光谱仪、热失重分析仪、BET比表面积和孔径分析仪等分析设备对改性前后白炭黑的结构形貌及其性能进行表征。结果表明:在反应温度为75℃、时间为90 min、改性剂MTS浓度为0.20 mol/L时,获得的改性白炭黑的分散性最好。MTS接枝后白炭黑物相结构仍为无定形结构,且孔径分布集中,孔径变窄为3~4nm,热稳定性增强,疏水性增强。
To improve the dispersivity and hydrophobicity,the precipitated silica powder was organically modified by methyltrichlorosilane(MTS)using as a solvent.The single factor rotation method was used to determine the best modification conditions.The effects of reaction temperature,time and MTS concentration on the physicochemical structure and properties of silica were investigated.The structure morphology and property of silica before and after modification were characterized by X-ray diffraction,Fourier transform infrared analysis,thermogravimetry,the pore structure was tested on a physical adsorption analyze.The results showed that the modified silica has the best dispersibility when the reaction temperature is 75℃,the time is 90 min,and the modifier MTS concentration is 0.20 mol/L.The modified silica is still noncrystalline,and its phase structure had no change.The pore size distribution of silica was narrowed to 3~4 nm,and the thermal stability of the samples was enhanced,and the hydrophobicity is dramatically enhanced.
作者
任卫国
王建成
常丽萍
鲍卫仁
韩丽娜
REN Wei-guo;WANG Jian-cheng;CHANG Li-ping;BAO Wei-ren;HAN Li-na(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and the Ministry of Science and Technology,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《人工晶体学报》
EI
CAS
北大核心
2019年第3期555-560,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(21476154)
煤燃烧国家重点实验室开放基金(FSKLCCA1606)
山西省回国留学人员科研资助项目(2016-026)
关键词
白炭黑
有机改性
改性剂MTS
疏水性
分散性
silica
organic modification
modifier MTS
hydrophbicity
dispersivity
作者简介
任卫国(1988-),男,山西省人,硕士研究生;通讯作者:韩丽娜,博士,教授。
