聚氨酯<strong>/</strong>水玻璃注浆材料固化过程中的微观结构和力学性能

doi:10.11901/1005.3093.2021.467

材料研究学报

2022, Vol. 36

Issue (11): 855-861 DOI: 10.11901/1005.3093.2021.467

研究论文

本期目录 | 过刊浏览

聚氨酯/水玻璃注浆材料固化过程中的微观结构和力学性能

曾志鹏¹^,², 宋小艳³, 孙勇¹, 宋双林¹, 陆伟²(

), 贺正龙²(

)

^1.中煤科工集团沈阳研究院有限公司煤矿安全技术国家重点实验室抚顺 113122
^2.山东科技大学安全与环境工程学院青岛 266590
^3.中国水利水电科学研究院北京 100038

Microstructure and Mechanical Property of Polyurethane/Water Glass Grouting Materials during Curing Process

ZENG Zhipeng¹^,², SONG Xiaoyan³, SUN Yong¹, SONG Shuanglin¹, LU Wei²(

), HE Zhenglong²(

)

^1.State Key Laboratory of Coal Mine Safety Technology, China Coal Technology &Engineering Group Shenyang Research Institute, Fushun 113122, China
^2.College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
^3.China Institute of Water Resources and Hydropower Research, Beijing 100038, China

引用本文:

曾志鹏, 宋小艳, 孙勇, 宋双林, 陆伟, 贺正龙. 聚氨酯/水玻璃注浆材料固化过程中的微观结构和力学性能[J]. 材料研究学报, 2022, 36(11): 855-861.
Zhipeng ZENG, Xiaoyan SONG, Yong SUN, Shuanglin SONG, Wei LU, Zhenglong HE. Microstructure and Mechanical Property of Polyurethane/Water Glass Grouting Materials during Curing Process[J]. Chinese Journal of Materials Research, 2022, 36(11): 855-861.

全文: PDF(6286 KB) HTML

摘要:

使用力学测试、扫描电子显微镜、X射线能谱仪和透射/漫反射红外光谱等手段分析了聚氨酯/水玻璃注浆材料在固化过程中的微观结构和宏观力学性能的变化。结果表明：聚氨酯/水玻璃注浆材料的固化具有明显的阶段性，在前7 d注浆材料的抗压强度、断裂韧度和弯曲强度迅速提高，分别达到55.4 MPa、1025.3 MPa·m^1/2和29.4 MPa，随后缓慢提高到58 MPa、1220.4 MPa·m^1/2和37.4 MPa。注浆材料的宏观力学性能，主要取决于有机相的交联固化程度。注浆材料的固化过程涉及有机相与水玻璃之间持续的水、二氧化碳和热交换，最终形成了由多异氰酸酯与水、聚醚多元醇反应生成的聚脲/聚氨酯和水玻璃凝胶固化后的硅酸盐颗粒组成的聚氨酯/水玻璃复合材料。

关键词 ：复合材料, 注浆材料, 固化过程, 聚氨酯, 力学性能, 微观结构

Abstract：

The microstructure and macroscopic mechanical property of polyurethane/sodium silicate grouting materials during curing process were studied by means of scanning electron microscopy, energy dispersive spectroscopy, transmission/diffuse reflectance infrared spectroscopy and mechanical testing. The results show that: within the first 7 days, the compressive strength, fracture toughness and bending strength of the polyurethane/sodium silicate grouting material increased rapidly up to 55.4 MPa, 1025.3 MPa·m^1/2 and 29.4 MPa, afterwards, they slowly increased to 58 MPa, 1220.4 MPa·m^1/2 and 37.4 MPa respectively; the macroscopic mechanical properties of grouting materials mainly depend on the degree of crosslinking-curing of organic phases; the curing process of the grouting material involves the continuous exchange of water, carbon dioxide and heat between the organic phase and sodium silicate, and finally forms the polyurethane/sodium silicate composite composed of polyurea/polyurethane, which was resulted from the reaction of polyisocyanate with water and polyether polyol and silicate particles cured by sodium silicate gel.

Key words： composite grouting materials curing process polyurethane mechanical properties microstructure

收稿日期: 2021-08-16

ZTFLH:

TQ323.8

基金资助:国家重点研发计划(2018YFC0807900);国家自然科学基金(52004148);山东省自然科学基金(ZR2020QE127);煤矿安全技术国家重点实验室开放基金(2020-KF-23-05)

作者简介: 曾志鹏，男，1995年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.467 或 https://www.cjmr.org/CN/Y2022/V36/I11/855

图1 聚氨酯/水玻璃材料的A和B组分

图2 聚氨酯/水玻璃材料力学性能与固化时间的关系

图3 聚氨酯/水玻璃材料断裂表面的SEM图

图4 球形颗粒和针状晶体的EDS谱

图5 固化时间不同的聚氨酯/水玻璃材料的傅里叶红外光谱

图6 固化28 d的聚氨酯/水玻璃材料的DRIFTS分析

图7 聚氨酯/水玻璃材料的固化过程和机理

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