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CSH-PCE中分散剂结构及其溶液构象对水泥水化过程的影响规律
作者：张茜1，王晓琼2，韩凤启2，徐海源2，姜骞1
（1.江苏苏博特新材料股份有限公司，江苏 南京 211103；
2.江苏省交通工程建设局，江苏 南京 210004）
2.江苏省交通工程建设局，江苏 南京 210004）
摘要：采用共沉淀法，通过调整合成条件与原料配比，制备了不同粒径的早强剂CSH-PCE纳米复合材料。利用动态光散射法对不同结构的早强剂CSH-PCE在纯水环境下的溶液行为进行研究，结合水化热等微观分析方法初步表征了早强剂的早期水化进程。结果表明：电荷密度较高的CSH-PCE，会展示出紧缩的构象进而更易展露出羧酸基团；不同长短主链结构协同作用下的CSH-PCE在早强效能方面有较好的表现，可为CSH-PCE纳米复合材料的结构设计提供了一定的参考。
关键词：聚羧酸减水剂；CSH-PCE；动静态光散射；分子溶液构象
中图分类号：TU528.042+.2 文献标识码：A 文章编号：1001-702X（2022）12-0110-04
Effect of structure and conformation of CSH-PCEnanocomposites on hydration of portland cement
ZHANG Qian1，WANG Xiaoqiong2，HAN Fengqi2，XU Haiyuan2，JIANG Qian1
（1.Jiangsu Sobute New Materials Co. Ltd.，Nanjing 211104，China；
2.Jiangsu Provincial Transportation Engineering Construction Bureau，Nanjing 210003，China）
Abstract：The early strength agent CSH-PCE nanocomposites with different particle sizes were prepared by coprecipitation method through adjusting the synthesis conditions and raw material ratio. The solution behavior of early strength agent CSH-PCE with different structures in pure water environment was studied by dynamic light scattering method，and the early hydration process of early strength agent was preliminarily characterized by microscopic analysis methods such as hydration heat. The results showed that CSH-PCE with higher charge density exhibited a tight conformation and then more easily exposed carboxylic acid groups. CSH-PCE with different length of main chain structure has better performance in early strength efficiency，which can provide a reference for the structural design of CSH-PCE nanocomposites.
Key words：polycarboxylate comb-like copolymers，CSH-PCE，dynamic and static light scattering，molecular structure and solution conformation