Shear-thickening behavior of modified silica nanoparticles in polyethylene glycol
Shear-thickening behavior of modified silica nanoparticles in polyethylene glycol
复制标题
DOI：
10.1007/s11051-012-0747-2
复制
发表时间：
2012-02
影响因子：
2.5
通讯作者：
Kejing Yu;Haijian Cao;K. Qian;Xiaofei Sha;Yanping Chen
中科院分区：
文献类型：
--
作者：
Kejing Yu;Haijian Cao;K. Qian;Xiaofei Sha;Yanping Chen
采用球磨法和乙二醇（EG）化学处理对平均粒径为650 nm的二氧化硅纳米颗粒表面进行了改性。采用傅里叶变换红外光谱和粒径分析方法对改性二氧化硅纳米颗粒进行了表征。采用透射电镜、扫描电镜观察了不同表面处理前后二氧化硅纳米颗粒的形貌。采用Anton-paar 301应力控制流变仪研究了改性二氧化硅悬浮液在聚乙二醇中的流变行为。流变学试验结果表明，表面处理对增加剪切增稠液中二氧化硅纳米颗粒的最大重量分数有很大的影响，特别是化学方法与EG的处理。
The surface of silica nanoparticles with an average diameter of 650 nm was modified by ball milling and chemical treatment with ethylene glycol (EG). The Fourier-transform infrared spectra and particle size analysis methods were used to characterize the modified silica nanoparticles. The morphologies of the silica nanoparticles before and after the different surface treatments were examined by transmission electron microscope, scanning electron microscope. The rheological behaviors of modified silica suspensions in polyethylene glycol were studied by using Anton-paar 301 stress-controlled rheometer. The results of rheological tests indicated that the surface treatments had a great effect on increasing the maximum weight fraction of silica nanoparticles in Shear-thickening fluids, especially treated by the chemical method with EG.