高固含量聚硅酸钾基防火凝胶及其在复合防火玻璃中的应用

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (4): 1344-1351.

高固含量聚硅酸钾基防火凝胶及其在复合防火玻璃中的应用

商珂, 王俊胜, 赵璧, 吴颖捷, 林贵德, 赵婧, 金星, 刘丹

应急管理部天津消防研究所,天津 300381

收稿日期:2020-12-14 修回日期:2021-01-18 出版日期:2021-04-15 发布日期:2021-05-11
通讯作者: 王俊胜,博士,副研究员。E-mail:wangjunsheng@tfri.com.cn
作者简介:商珂(1990—),男,博士,助理研究员。主要从事阻燃/防火材料的研究。E-mail:shangke@tfri.com.cn
基金资助:
国家重点研发计划(2018YFC0807600,2018YFC0807603)

High-Solid Potassium Polysilicate Based Fire-Resistant Gel and Its Application in Composite Fireproof Glass

SHANG Ke, WANG Junsheng, ZHAO Bi, WU Yingjie, LIN Guide, ZHAO Jing, JIN Xing, LIU Dan

Tianjin Fire Research Institute of MEM, Tianjin 300381, China

Received:2020-12-14 Revised:2021-01-18 Online:2021-04-15 Published:2021-05-11

摘要/Abstract

摘要： 通过蒸发浓缩的方法制备了高固含量硅溶胶分散液,采用纳米粒度及Zeta电位分析仪研究了蒸发浓缩前后分散液中无机粒子粒径和Zeta电位的变化。进而,以高固含量硅溶胶分散液为原料,氢氧化钾溶液为固化剂,制备了高固含量聚硅酸钾基防火凝胶和复合防火玻璃,采用小型耐火试验炉、热重分析、扫描电子显微镜、红外光谱等测试手段,研究了复合防火玻璃的耐火性能及防火凝胶的热稳定性和耐火机理。结果表明:蒸发浓缩的方法对纳米粒子的粒径和分散稳定性几乎没有影响;分散液固含量的提高能够极大地提升复合防火玻璃的耐火隔热性,并一定程度上提升防火凝胶的热稳定性。

关键词: 复合防火玻璃, 硅溶胶, 聚硅酸钾, 防火凝胶, 耐火性能, 热稳定性, 耐火机理

Abstract: In order to obtain the composite fireproof glass with better fire resistance, the high-solid silica sol dispersion was first prepared by evaporating water process. The particle size of inorganic particles and Zeta potential changes of the dispersion before and after evaporation were studied using nanoparticle size and Zeta potential analyzer. The results show that the evaporation process has almost no effect on the particle size and dispersion stability of the nanoparticles. Then, the high-solid potassium silicate based fire-resistant gel and composite fireproof glass were prepared using the high-solid silica sol dispersion and potassium hydroxide solution as raw material and curing agent, respectively. Small refractory test furnace and thermogravimetric analysis were used to investigate the fire resistance of the composite fireproof glass and the thermal stability of the fire-resistant gel. The results show that the increase of the solid content in dispersion greatly improves the fire resistance of the composite fireproof glass, and also enhances the thermal stability of the fire-resistant gel to a certain extent. Furthermore, the scanning electron microscopy and infrared spectroscopy tests were used to reveal the fire resistant mechanism of the fireproof gel. It shows that the evaporation process of fire-resistant gel acts as an endothermic function and the solid carbon residue produced by the fire-resistant gel at high temperature plays a role in blocking heat.

Key words: composite fireproof glass, silica sol, potassium polysilicate, fire-resistant gel, fire resistance, thermal stability, fire resistant mechanism

中图分类号:

TQ171

商珂, 王俊胜, 赵璧, 吴颖捷, 林贵德, 赵婧, 金星, 刘丹. 高固含量聚硅酸钾基防火凝胶及其在复合防火玻璃中的应用[J]. 硅酸盐通报, 2021, 40(4): 1344-1351.

SHANG Ke, WANG Junsheng, ZHAO Bi, WU Yingjie, LIN Guide, ZHAO Jing, JIN Xing, LIU Dan. High-Solid Potassium Polysilicate Based Fire-Resistant Gel and Its Application in Composite Fireproof Glass[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(4): 1344-1351.

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