高保水矿用凝胶阻化材料的制备和性能研究  

Preparation and Performance Study of High Water Retention Mineral Hydrogel Inhibitors

作　　者：李洋[1,2] 戴广龙[1,2] 杨苗苗[1,2] LI Yang;DAI Guanglong;YANG Miaomiao(School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan 232001,China;Key Laboratory of Safe and Efficient Coal Mine Mining,Ministry of Education,Huainan 232001,China)

机构地区：[1]安徽理工大学安全科学与工程学院,安徽淮南232001 [2]煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《煤炭技术》2023年第3期173-177,共5页Coal Technology

基　　金：安徽理工大学2021年研究生创新基金项目(2021CX2017);国家自然科学基金项目(52074011)。

摘　　要：为防治煤自燃,以聚乙烯醇(PVA)、海藻酸钠(SA)和碱木质素(AL)为基体,硼砂(Borax)为交联剂,采用一锅法制备出一种新型高保水矿用凝胶阻化材料(PBSL)。以PVA,SA,AL,硼砂浓度(w(Borax))和加热时间为影响因素,设计了正交实验L16(4^(5)),结果表明,PVA,SA,AL分别为0.25、0.2、0.1 g,且w(Borax)=6%、加热时间为45 min时,材料的保水率和吸水率综合性能最佳,50℃加热30 h后保水率仍能达到38.52%,吸水率达到47.67%。通过分子结构分析,材料形成了硼酸酯键和氢键;阻化性能研究表明,PBSL凝胶阻化材料使煤样临界温度从80℃提高到100℃,200℃时材料阻化率高达55.28%,从而降低了煤的氧化活性。To prevent spontaneous combustion of coal, a novel type of high water retention mineral hydrogel inhibitors(PBSL) was prepared by one-pot method using polyvinyl alcohol(PVA), sodium alginate(SA), alkaline lignin(AL) and borax(Borax). The orthogonal experiment L16(4^(5)) was designed and the results showed that when PVA 0.25 g, SA 0.2 g,AL 0.1 g, w(Borax) =6% and heating time was45 min,the comprehensive properties of water retention and water absorption were the best. After heating at 50℃ for 30 h, the water retention rate can still reach 38.52% and the water absorption rate can reach 47.67%. The molecular structure analysis shows that the material forms borate ester bonds and hydrogen bonds;the inhibition performance study shows that the PBSL material increases the critical temperature of coal samples from 80℃ to 100℃, and the inhibition rate can reach 55.28% at200℃.

关 键 词：高保水 凝胶阻化材料 阻化性能 煤自燃 防灭火材料 

分 类 号：TD752.2[矿业工程—矿井通风与安全]