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中文摘要：
用应力控制流变仪考察了合成温度和分散时间对SiO2/PEG分散体系流变性能的影响,实验结果表明,随着合成温度的升高,分散体系的表观粘度增大,剪切增稠行为显著;随着分散时间的延长,分散体系的表观粘度减小,剪切增稠行为不明显.进一步探讨了工艺参数影响SiO2/PEG分散体系流变性能的机理,研究表明,合成温度和分散时间主要是通过改变分散体系中气相成分的量而产生影响,体系中气相成分越多,其粘度越大,剪切增稠的特性也更加明显.
英文摘要：
In this paper,the influence of synthesis temperature and dispersion time on the rheological properties of silica dispersions was studied with a stress controlled rheometer.The results show that as the synthesis tem-perature increases,the systems shows more obvious shear thickening and higher apparent viscosity,mean-while,over dispersion time the systems shows less obvious shear thickening and smaller apparent viscosity,the mechanism about the effect of the synthesis temperature and dispersion time on the rheological properties of sili-ca dispersions was explored by future study,and the study shows that synthesis temperature and the dispersion time can change the content of the gas phase,which has some influence on the rheological properties of the dis-persions,the properties of shear thickening improvemed and the apparent viscosity increased as the gas phase in the system increased.
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