纳米二氧化钛涂层沥青路面降解汽车尾气应用效果研究

发布时间：2018-03-27 17:30

本文选题：沥青路面　切入点：汽车尾气　出处：《湖南科技大学》2017年硕士论文

【摘要】：随着经济社会的发展,汽车保有量不断增加,大量汽车排放的尾气导致大气环境不断恶化,因此如何处理汽车尾气已成为亟待解决的问题。纳米TiO_2材料具有高效、安全及可循环使用等特点,且在太阳光紫外线作用下能将汽车尾气中污染物氧化为无毒无害物质,以起到空气净化作用。由于路面是汽车尾气的第一接触物,因此研究在路面上涂覆纳米TiO_2材料进行汽车尾气降解有重要意义。本文对国内外研究资料进行汇总,首先总结了纳米TiO_2降解汽车尾气机理及提高其降解效率的改性方法,并考虑现有汽车降解效果测试设备不足,开发了能提供均匀光照条件和稳定温度条件的新设备,确定了其元件组成、使用步骤、试验条件及降解效果评价指标;然后以汽车尾气中NO为例,研究使用纳米TiO_2颗粒直接撒布时其撒布量对NO降解效果的影响,并分析制备纳米TiO_2涂层时剪切速率、纳米TiO_2掺量和分散剂对其降解效果影响规律;此外,研究了纳米TiO_2涂层用量对沥青混合料抗滑性能影响规律,并分析采用金刚砂对其进行改善时掺量对改善效果影响;最后基于加速磨耗试验,研究了纳米TiO_2涂层抗滑性能及NO降解效果耐久性。
[Abstract]:With the development of economy and society, the quantity of automobile is increasing, and a large amount of exhaust gas from automobile causes the atmospheric environment to deteriorate continuously. Therefore, how to deal with the exhaust gas of automobile has become an urgent problem to be solved. Nanometer TiO_2 material has high efficiency. It can be used safely and circularly, and can oxidize the pollutants in automobile exhaust into non-toxic and harmless substance under the action of ultraviolet ray of sun, so as to purify the air, because the road surface is the first contact material of automobile exhaust, Therefore, it is of great significance to study the degradation of automobile exhaust gas with nano-sized TiO_2 coated on the pavement. In this paper, the domestic and foreign research data are summarized. Firstly, the mechanism of nano-#en1# degradation of automobile exhaust and the modification methods to improve its degradation efficiency are summarized. Considering the shortage of existing testing equipment for automobile degradation effect, a new equipment which can provide uniform illumination condition and stable temperature condition is developed, and its component composition, application steps, test conditions and evaluation index of degradation effect are determined. Then, taking no in automobile exhaust as an example, the effect of the amount of nano TiO_2 particles on the degradation of no was studied, and the shear rate, the content of nano TiO_2 and dispersant on the degradation effect of nano TiO_2 coating were analyzed. In addition, the effect of nano-scale TiO_2 coating content on the anti-skid performance of asphalt mixture is studied, and the influence of the amount of TiO_2 coating on the performance of asphalt mixture is analyzed when the asphalt mixture is improved by using Emery. Finally, based on the accelerated wear test, The skid resistance and the durability of no degradation of nano TiO_2 coatings were studied.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U416.2;X734.2

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