Wet Surface Modification of Calcium Silicate Hydrate Superfine Powder
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摘要: 为改善水化硅酸钙超细粉体与高分子材料基体的相容性,采用4种改性剂对其进行表面湿法改性处理,从中优选了1种改性剂.对优选的改性剂,通过正交试验,研究改性剂用量、浆料浓度、改性温度以及改性时间对超细水化硅酸钙粉体改性的影响.试验所得最佳改性效果:活化指数从0提高到95%,吸油值由86.5 mL/100 g降到69.5 mL/100 g.红外光谱图分析显示,优选的改性剂在水化硅酸钙粉体表面产生了化学吸附,使粉体表面有机化.Abstract: Four kinds of modifiers were chosen to conduct wet modification experiments for calcium silicate hydrate to improve its compatibility with polymer materials.The modifier with the best modification effect was optimally selected to do orthogonal experiments to investigate the effects of modifier quantity,concentration of calcium silicate hydrate in the slurry,and modification temperature and time on surface modification of calcium silicate hydrate.Under the optimal condition,the active index of the modified product increased from 0 to 95%,and the oil absorption value decreased from 86.5 mL/100 g to 69.5 mL/100 g.Infrared analysis shows that chemical adsorption of the optimally selected modifier happens on the surfaces of the calcium silicate hydrate powders,resulting in their organization.
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