汽车尾气降解材料路用稳定剂开发及性能评价

在路面中使用光催化材料可以降解汽车尾气中的有害气体，雾封层和含砂雾封层为该材料经济有效的载体，但降解材料与载体之间相容性差导致的离析问题制约了该技术的应用。针对这一问题，基于自主研发的氮掺杂二氧化钛基降解材料，研制了具有聚丙烯酰胺链接枝的纤维素高分子聚合物稳定剂，并提出了稳定性评价方法和评价指标。检测结果表明：稳定剂可显著提高降解材料与载体之间的相容性和稳定性，在2%掺量和180 h存储时间下，稳定系数不大于5.5%，满足了工程应用的要求，与此同时，降解效果明显改善，其中尾气中NO_x，HC和CO的降解率分别提升了20%、11%和7%以上。

Development and Evaluation of Stabilizer for Automobile Exhaust Gas Degradation Materials Application in Pavement

The use of photocatalytic materials in pavement can degrade harmful gases in automobile exhaust. The fog seal layer and sand-containing seal layer are economical and effective carriers for this material, but the separation problem caused by poor compatibility between degradation materials and carriers constrained the application of this technology. Aiming at this problem, based on the self-developed nitrogen-doped titanium dioxide-based degradation materials, a polar polymer stabilizer with cross-linking chain structure was developed and a stability evaluation method and evaluating indicator were proposed. The test results show that the stabilizer can significantly improve the compatibility and stability between the degradation material and the carrier, Under the 2% dosage and 180 h storage time, the stability coefficient is not more than 5.5%, which meets the requirements of engineering application. At the same time, the degradation effect is obviously improved, the degradation rates of NO_x, HC and co in exhaust gas increased by more than 20%, more than 11% and more than 7% respectively.