环保型双网络水凝胶抑尘剂的性能研究

Study on performance of environment-friendly double network hydrogel dust suppressant

基于露天储煤场煤尘污染问题,利用聚乙烯醇(PVA)、黄原胶(XG)和丙烯酸(AA)分子间的氢键作用,制备了具有互穿双网络结构的水凝胶(PVA-XG-AA),并通过加入表面活性剂(SDBS)进一步增强了润湿效果,制备了一种集润湿、黏结于一体的环保型双网络水凝胶抑尘剂(PVA-XG-AA/SDBS);通过表面张力实验及渗透性实验测试发现PVA-XG-AA/SDBS与传统型聚丙烯酸水凝胶抑尘剂(PAA)相比具有更好的润湿性能;通过抗腐蚀性实验以及对喷洒PVAXG-AA/SDBS前后煤粉的工业分析验证了PVA-XG-AA/SDBS的环保性。结果表明:PVA-XGAA/SDBS对金属(铜、铁)和煤质未造成显著影响。

Based on the problem of coal dust pollution in the open-air coal stocking yard,the hydrogel with interpenetrating double network structure(PVA-XG-AA)was prepared by using the hydrogen bonding between polyvinyl alcohol(PVA),xanthan gum(XG)and acrylic acid(AA).The wetting effect was further enhanced by adding surfactant(SDBS),and an environment-friendly double network hydrogel dust suppressant(PVA-XG-AA/SDBS)integrating wetting and bonding was prepared.Through surface tension test and permeability test,it was found that PVA-XG-AA/SDBS had better wettability than the traditional polyacrylic acid hydrogel dust suppressant(PAA).The environmental protection of PVA-XG-AA/SDBS was verified through corrosion resistance experiments and industrial analysis of pulverized coal before and after spraying PVA-XG-AA/SDBS.The results showed that PVAXG-AA/SDBS had no significant impact on metals(copper,iron)and coal quality.