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WW Wenxuan Wang
YY Ying Yang
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Micro SiO2 (20 um) and nano SiO2 (30 nm) were purchased from Beijing DK nano technology Co., LTD (Beijing, China) and then modified with silane coupling agent KH-550 purchased from Kunshan Lvxun electronic material Co., LTD (Jiangsu, China). 0.6 g KH-550 was dissolved in 200 ml 95% alcohol under stirring for 5 min, then 6 g micro SiO2 or nano SiO2 were added into the solution and the mixture was stirred under room temperature for 2 h. Finally after the slurry was dried at 70 °C for 24 h and 130 °C for 12 h, the KH-550 modified SiO2 micro particles and nano particles were obtained.

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