Inorganic Chemicals Industry ›› 2020, Vol. 52 ›› Issue (9): 52-56.doi: 10.11962/1006-4990.2020-0030

• Research & Development • Previous Articles     Next Articles

Research on effect of dispersion medium on rheological properties of nanometer SiO2′s dispersion system

Xu Supeng1(),Wang Hongwei1,Zheng Anxiong2   

  1. 1. Department of Metallurgy and Chemical Engineering,Jiyuan Vocational and Technical College,Jiyuan 459000,China
    2. Technology Center,Henan Zhongyuan Special Steel Equipment Manufacturing Co.,Ltd.
  • Received:2020-03-24 Online:2020-09-10 Published:2020-09-27

Abstract:

The rheological properties of nanometer SiO2′s dispersion system under the conditions of different dispersion me-diums, as well as the different relative molecular mass and temperature of one single dispersion medium were determined and compared.The results showed that with the increasing of the relative molecular mass,the dispersion system′s viscosity increa-sed,the hydrogen bonding between solid and liquid weakened and the critical shear stress needed by dispersion system dec-reased.When the relative molecular mass of dispersion medium increased to some extent,the hydrogen bonding between solid and liquid was weaker and space steric effect was caused by the growth of molecular chain.Then the nanometer SiO2 was not exis-tent with three-dimensional netted structure in dispersion medium,the rheological properties curves didn′t have shear thinn-ing first and then shear thickening.With the increasing of the dispersion medium′s temperature,the dispersion system′s viscosity decreased,the critical shear stress for shear thickening increased,the effect of the shear thickening became worse,and even the rheological properties curves didn′t have shear thinning first and then shear thickening.So selecting suitable dispersion medium and dispersion medium′s temperature can improve the rheological properties of nanometer SiO2′s dispersion system.

Key words: nanometer SiO2, shear thickening fluid, dispersion system, rheological properties, dispersion medium

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