硫酸钙晶须表面包覆二氧化硅的制备及机理分析

Abstract

Abstract: With sodium silicate as silicon source，dense silica nano-films were coated on the surface of calcium sulfate whisker （CSW） by liquid deposit method to modify it inorganically.Silica-coated CSW and mechanism were characterized by scan- ning electron microscope（SEM），X-ray powder diffraction（XRD），and Fourier transform infrared spectroscopy（FT-IR） etc.. Results showed that when the reaction temperature was 90 ℃ and pH=9，a dense silica layer coated on the surface of CSW uniformly.The zeta potential was obviously improved after coating.When SiO2-CSW was applied in thermoplastic elastomer of EPDM/PP，it could effectively improve the degree of dispersion of CSW.

Key words: CaSO4 whisker, silica, coating modification, dispersibility

CLC Number:

TQ132.32

WANG Di, DANG Ya-Gu, FEI De-Jun, SUN Xian. Preparation and mechanism analysis of silica-coated CaSO4 whisker[J]. INORGANICCHEMICALSINDUSTRY, 2016, 48(12): 37-.

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Inorganic Acid-Base-Salt Committee of CIESC

Preparation and mechanism analysis of silica-coated CaSO4 whisker

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