Geopolymer microspheres were made by suspension dispersion solidification method(SDS),which was to drop the geopolymer slurry made of slag,sodium silicate solution,and water into dimethylsilicone oil with constant temperature.Geopolymer microsphere was characterized by X-ray powder diffraction (XRD),scanning electron microscope (SEM),and ultra-high speed intelligent particle size analyzer.And based on the characterization,the effects of dimethyl silicone oil temperature,the speed of dispersing machine and viscosity of dimethyl silicone oil on the particle size and sphericity of the microsphere were analyzed.The results showed that when the temperature of dimethylsilicone oil was 50℃,the content of microspheres less than 150μm was the highest.When the speed of the dispersing machine was 5000r/min,the contents of 1.0～10.0μm and 10.0～30.8μm microspheres reached 19.40% and 36.17%,respectively.When viscosity of dimethylsilicone oil 1000mm2/s,the content of 1.0～30.8μm microspheres reached 48.19%.From XRD analysis,the prepared microspheres did not change the crystal structure of the slag,indicating that sintering removed the residual dimethyl silicone oil on the surface of the microspheres and in the pores.According to BET analysis,the microspheres had high specific surface area and mesoporous structure,which provided active sites for the application of catalyst support,adsorbent,water pollution treatment,etc.The microspheres was easier for ion diffusion and had a broad application prospect.
Xue Guohui, Su Qiaoqiao, He Yan, Ge Yuanyuan, Cui Xuemin
. Study on the preparation of geopolymer microsphere by suspension dispersion solidification[J]. New Chemical Materials, 2021
, 49(3)
: 77
-82
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.03.018
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