摘要
为改善煤矿井下的特殊作业环境以及聚氨酯(PU)注浆材料在应用中的安全性,选取可膨胀石墨(EG)、甲基膦酸二甲酯(DMMP)添加到PU浆材中探索最优的工艺配方,制得EG/DMMP改性聚氨酯注浆材料。通过红外测温仪、导热系数测量仪、电子万能试验机和锥形量热仪研究EG、DMMP对浆材的最高反应温度、固化时间、导热性能、力学性能和阻燃性能的影响。研究结果表明:当1%EG与1%DMMP复配引入体系后,不仅可以降低浆材的最高反应温度,还赋予浆材较为优异的阻燃和抑烟减毒性能,PU注浆复合材料的热释放速率峰值、总热释放量、一氧化碳产生速率峰值与纯PU相比分别降低43.5%,32.2%,30.3%,PU注浆复合材料压缩强度和拉伸强度分别为55.7,51.0 MPa, EG/DMMP改性聚氨酯注浆材料基本解决了浆材“热失控”隐患的同时又兼顾了其力学性能的双重需求。研究结果可为PU注浆材料在煤矿井下的安全应用提供一定参考。
In order to improve the special working environment of underground coal mines and the safety of polyurethane(PU)grouting materials in application,the expandable graphite(EG)and dimethyl methyl phosphonate(DMMP)were selected to be added in PU slurry to explore the optimal process formulation,and EG/DMMP modified polyurethane grouting materials were produced.Meanwhile,the influence of EG and DMMP on the maximum reaction temperature,curing time,thermal conductivity,mechanical properties and flame-retardant properties of the slurry was investigated by infrared thermometer,thermal conductivity meter,electronic universal testing machine and cone calorimeter.The results show that when 1%EG and 1%DMMP are compounded and introduced into the system,it not only reduces the maximum reaction temperature of the slurry,but also gives the slurry excellent flame retardant,smoke suppression and toxicity reduction performance.The peak heat release rate,the total heat release,and the peak rate of carbon monoxide generation of the PU grouting composites are reduced by 43.5%,32.2%,and 30.3%respectively compared with those of pure PU,and the compression strength and tensile strengths are 55.7 MPa and 51.0 MPa,respectively,which fulfils the double demand of EG/DMMP modified polyurethane grouting material basically solves the hidden danger of“thermal runaway”of the grouting material while considering its mechanical properties.The research results can provide a certain guarantee for the safe application of PU grouting materials in underground coal mines.
作者
程玉龙
印恋
周克清
刘清晨
CHENG Yulong;YIN Lian;ZHOU Keqing;LIU Qingchen(China Academy of Safety Science and Technology,Beijing 100012,China;Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan Hubei 430074,China;College of Environmental Engineering,Three Gorges Vocational College of Electric Power,Yichang Hubei 443000,China)
出处
《中国安全生产科学技术》
CAS
CSCD
北大核心
2024年第4期64-69,共6页
Journal of Safety Science and Technology
基金
国家自然科学基金项目(22005277)
中国地质大学(武汉)2022年大学生自主创新中央高校基本科研项目(CUGDCJJ202203)。
关键词
聚氨酯注浆材料
最高反应温度
力学强度
导热
阻燃
polyurethane grouting materials
maximum reaction temperature
mechanical strength
thermal conductivity
flame retardancy
