微米级二氧化硅空心微球的制备及表征

doi:10.19976/j.cnki.43-1448/TF.2022015

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Abstract The hollow SiO₂microspheres were prepared through the hard template method and sol-gel method by using self-made polystyrene (PS) as template, cetyltrimethyl ammonium bromide (CTAB) as cationic surfactant and Tetraethyl orthosilicate (TEOS) as silica source. Effects of heating rate, content of CTAB, TEOS and ammonia on the morphology of hollow SiO₂microspheres were discussed. The phase, morphology and mesoporous structure of hollow SiO₂microspheres were characterized by XRD, TEM, SEM, TG and FTIR, which shows the successful preparation of hollow silica sphere. The particle sizes of hollow SiO₂microspheres are 2-5 μm and the thickness is 117 nm. The hollow SiO₂microsphere wall damage with the increase of heating rate. With increasing CTAB content, the number of nanospheres increase and the particle sizes of nanospheres decrease. With increasing TEOS content, the thicknesses of spheres increase until nanospheres are formed. When ammonia is less than 4 mL, hollow SiO₂ microsphere cannot be formed. When ammonia is greater than 4 mL, hollow SiO₂ microsphere have rough surface with solid particles. The optimized conditions are determined as follows: the heating rate is 0.5 ℃/min, the amount of CTAB is 0.05 g, the amount of TEOS is 0.3 mL, the amount of ammonia is 4 mL and then hollow SiO₂ microspheres are treated through filtering and cleaning.

Key words： micron hollow microspheres silica hard template method sol-gel method polystyrene

Received: 04 March 2022 Published: 19 July 2022

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	WEN Sufen
	ZOU Jinzhu
	ZHOU Xuefan
	LUO Hang

Cite this article:

WEN Sufen,ZOU Jinzhu,ZHOU Xuefan, et al. Preparation and characterization of micron hollow silica microspheres[J]. Materials Science and Engineering of Powder Metallurgy, 2022, 27(3): 336-344.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2022015 OR http://pmbjb.csu.edu.cn/EN/Y2022/V27/I3/336

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