酸性介质对硅酸聚合胶凝的影响

酸性介质对硅酸聚合胶凝的影响 Effect of Acid on the Polymerization of Silicic Acid 许韵华 XU Yun-hua 1 2 first-author 杨玉国 YANG Yu-guo 1 2 王永生 WANG Yong-sheng 1 2 尹承龙 YIN Cheng-long 1 2 北京交通大学理学院 北京交通大学理学院 School of Sciences, Beijing Jiaotong University School of Sciences, Beijing Jiaotong University 北京交通大学理学院,北京,100044 北京交通大学理学院,北京,100044 对在不同酸性介质中的硅酸聚合胶凝曲线进行了研究,获得了有酸性介质存在时,不同pH值条件下硅酸的形态分布及转化特征.结果表明:在中性或弱酸性条件下、乙酸存在时,硅酸的聚合胶凝时间较其他酸性介质存在时有所延长,并证实了乙酸的存在能有效地减缓硅酸溶液中聚硅酸的生长速度. The characteristics of silicic acid polymerization were studied and the gel curves of silicic acid were obtained in different acid medium. The species distribution and transforming characteristics of polysilicate in different pH values was also studied when acid medium exists. The experimental results show that the gel time is longer under the faintly acid and neutral condition when there is acetic acid in silicic acid solution, and the growth rate of polysilicic acid is retarded. 硅酸聚合 乙酸 形态分布与转化 silicic acid polymerization acetic acid species distribution and transformation X703.5 北京市自然科学基金资助项目（2042018） 2005-02-01 2021-04-01 2