负载不同引气剂的SiO2复合材料的制备及其在水泥基材料中的应用

硅酸盐通报 ›› 2024, Vol. 43 ›› Issue (9): 3157-3163.

负载不同引气剂的SiO₂复合材料的制备及其在水泥基材料中的应用

沈斐^1,2, 乔敏^1,2, 单广程^1,2, 吴庆勇^1,2

1.江苏苏博特新材料股份有限公司高性能土木工程材料国家重点实验室,南京 211103;
2.江苏省建筑科学研究院有限公司,南京 210008

收稿日期:2024-01-17 修订日期:2024-04-25 出版日期:2024-09-15 发布日期:2024-09-19
通信作者: 乔敏,博士,教授级高级工程师。E-mail:qiaomin@cnjsjk.cn
作者简介:沈斐(1996—),男,助理工程师。主要从事水泥基材料化学外加剂的研究。E-mail:shenfei@cnjsjk.cn
基金资助:
国家自然科学基金面上项目(52178213)

Preparation of SiO₂ Composite Materials Loaded with Different Air-Entraining Agents and Their Application in Cement-Based Materials

SHEN Fei^1,2, QIAO Min^1,2, SHAN Guangcheng^1,2, WU Qingyong^1,2

1. State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China;
2. Jiangsu Research Institute of Building Science Co., Ltd., Nanjing 210008, China

Received:2024-01-17 Revised:2024-04-25 Published:2024-09-15 Online:2024-09-19

摘要/Abstract

摘要： 本文以4种不同结构的阴离子引气剂为模板剂来制备负载引气剂的SiO₂纳米颗粒,在硅源水解过程中引入(3-氨基丙基)三乙氧基硅烷,并通过静电相互作用吸引更多的阴离子引气剂,验证该制备方法对负载各类阴离子引气剂的可行性,同时探究引气剂的结构对复合产物及其应用性能的影响。结果表明:4种负载引气剂的SiO₂复合材料均能在溶液中表现出缓释效果,在砂浆中提高气泡的稳定性,抑制2 h内含气量的损失,优化硬化试块的气孔参数。表面活性剂分子和胶束的空间体积显著影响着产物的粒径和表面活性剂的负载率,进而影响SiO₂复合材料在溶液中的释放量以及在砂浆中的稳泡效果。

关键词: SiO₂, 引气剂, 缓释, 稳泡, 气孔, 水泥砂浆

Abstract: SiO₂ nanoparticles loaded with air-entraining agents were prepared with four different anionic air-entraining agents as the templating agent. The introduction of (3-aminopropyl) triethoxysilane during the hydrolysis of silicon sources can attract more anionic air-entraining agents to SiO₂ through electrostatic interaction. The feasibility of preparation method for loading various anionic air-entraining agents was verified. Meanwhile, the influences of structure of air-entraining agents on structure and application of products were investigated. The results show that all SiO₂ composite materials loaded with air-entraining agents present a release of air-entraining agents in solution and improve the bubble stability in mortars. The addition of SiO₂ composite materials to cement mortar results in a low loss of air content within 2 h, also optimizing the air-void parameters of hardened mortars. The volume of surfactant molecules and micelles significantly affects the particle size and the load of surfactants in products, which in turn influences the air content of SiO₂ composite materials in solutions and the enhancement of bubble stability in mortars.

Key words: SiO₂, air-entraining agent, slow-release, bubble stability, air-void, cement mortar

中图分类号:

TU528

沈斐, 乔敏, 单广程, 吴庆勇. 负载不同引气剂的SiO₂复合材料的制备及其在水泥基材料中的应用[J]. 硅酸盐通报, 2024, 43(9): 3157-3163.

SHEN Fei, QIAO Min, SHAN Guangcheng, WU Qingyong. Preparation of SiO₂ Composite Materials Loaded with Different Air-Entraining Agents and Their Application in Cement-Based Materials[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2024, 43(9): 3157-3163.

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负载不同引气剂的SiO₂复合材料的制备及其在水泥基材料中的应用

Preparation of SiO₂ Composite Materials Loaded with Different Air-Entraining Agents and Their Application in Cement-Based Materials

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