蓄盐缓释融雪抑冰材料的制备及性能研究

Preparation and properties of sustained release deicing salt-storage materials

通过表面改性试验、溶出试验和溶液电导率测定试验,筛选出可用于蓄盐缓释融雪抑冰材料的载体(载体A)和表面改性剂(表面改性剂J),通过优化制备方法和成分配比,开发出具有降低溶液冰点功能和缓释功能的蓄盐缓释融雪抑冰材料。吸附试验和电导率测定试验的结果表明:载体A能够吸附的氯化钠含量较高,适合作为材料的载体;采用湿法吸附制备的融雪抑冰材料的缓释性能优于干法吸附制备的材料;随着表面改性剂J添加量的增大,融雪抑冰材料的缓释性增强。自制的蓄盐缓释融雪抑冰材料的组成为氯化钠、载体A、表面改性剂J,三者的质量分数分别为57.91%、38.60%、3.49%。溶出试验和溶液冰点测试试验表明自制的蓄盐缓释融雪抑冰材料具有良好的缓释性和降低溶液冰点能力。

Incorporating sustained release deicing salt-storage materials(SRDSSM)in an asphalt pavement can reduce the freezing point of the pavement and help melt snow even at temperatures below 0℃,hence greatly improving transportation safety in winter.However the currently used materials are mostly imported and expensive.In this work,carrier materials and surface modifiers for developing new SRDSSM were studied by surface modification tests,dissolution tests and conductivity tests.An effective SRDSSM with excellent properties of reducing freezing point and slow-release was developed by optimizing the preparation method and material composition.The results indicated that the amount of NaCl absorbed by carrier A was greater than other carriers and the slow-release performance of the materials prepared by wet adsorption was better than dry adsorption.With increasing amount of surface modifier,the slow-release performance of the materials was further enhanced.The optimum materials contained NaCl,carrier A,and surface modifier J in a mass ratio of 57.91%,38.60%and 3.49%.Dissolution and freezing point tests demonstrated that the prepared SRDSSM had better slow-release performance and deicing effects than imported Mafilon material.