Abstract: In this paper,a gel dry water was prepared using SiO2 gel as the core and hydrophobic nano SiO2 particle as the shell under high-speed shear. Powder parameters like fluidity, stability, particle size distribution, bulk density and water repellency were studied. The results show that compared with the traditional dry water powder, SiO2 gel dry water powder shows smaller repose angle, larger outflow velocity and better fluidity. The traditional dry water powder can be destroyed at the centrifuge speed of 2 000 r/min, while SiO2 gel dry water powder only agglo-merate when the centrifuge speed reaches 6 000 r/min. The bulk density of SiO2 gel dry water powder is smaller than dry water powder. For the existence of hydrophobic nano SiO2 shell, the as-prepared SiO2 gel dry water powder presents excellent water repellency.
史燕娟, 冯梦梦, 陈光楠, 肖欢, 石贵滨, 曹承然, 何松. SiO2凝胶干水粉体性能研究[J]. 材料导报, 2020, 34(16): 16025-16030.
SHI Yanjuan, FENG Mengmeng, CHEN Guangnan, XIAO Huan, SHI Guibin, CAO Chengran, HE Song. Study on Properties of SiO2 Gel Dry Water Powders. Materials Reports, 2020, 34(16): 16025-16030.
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2020, Vol. 34 
