分别制备了不同明度、色相、质感的平涂、水包水、水包砂型反射隔热复合涂层，并使用硅改性丙烯酸树脂和纳米二氧化钛水溶胶对这些复合涂层进行耐污防护，在此基础上考察自然老化时间对这些涂层的反射效果的影响作用。结果表明，对于平涂体系，涂装纳米二氧化钛水溶胶的涂层，与未涂装耐沾污涂层及涂装硅丙罩面涂层相比，其初始光泽和色相不受影响，且耐沾污能力得到了改善，反射能力的可持续性得以提高，中、高明度样品尤为显著，适用于既有反射隔热建筑外涂层的保护涂装或产品改善；质感涂层的耐沾污和反射能力可持续性也是涂覆纳米二氧化钛水溶胶的样品最佳，但是由于其表面平整度过差，导致自洁能力不足以与沾污作用抗衡，故反射性能的维持仍以考虑调整涂层质感和整体明度为主。
Solar reflective coatings with different hue， lightness and texture are prepared， and separately coated with silicon modified acrylic resins and nano-titanium dioxide hydrosol in order to investigate the effects of these antifouling layers on the solar reflective sustainability of the protective coating over natural aging. The result shows that for the flat-paint system， the layers comprising nano-titanium dioxide hydrosol does not affect the initial gloss and hue of the protective coatings but improve the dirt-resistance and the sustainability of the solar reflective property， particularly in medium and high brightness samples， therefore it can be used for the promotion of the existing products. When applied on the sand-textured coatings， nano titanium dioxide hydrosol also has better performance as compared with the silicon modified acrylic resins， showing considerable increase in dirt-resistance and reflectance sustainability. But for this kind of coatings， the dirt can not be effectually self-cleaned due to the roughness of the textured surface， indicating that the reflectance sustainability of these coatings are mainly dominated by their texture and lightness.
[1]GUO W， QIAO X， HUANG Y， et al.Study on energy saving effect of heat-reflective insulation coating on envelopes in the hot summer and cold winter zone[J].Energy ＆ Buildings, 2012, 50(7):196-203
[2]JOUDI A， SVEDUNG H， CEHLIN M， et al.Reflective coatings for interior and exterior of buildings and improving thermal performance[J].Applied Energy, 2013, 103(2):562-70
[3]GAO Q， WU X， FAN Y， et al. Color performance and near infrared reflectance property of novel yellow pigment based on Fe 2 TiO 5 nanorods decorated mica composites[J]. Dyes ＆ Pigments，.[J].，, 2017, :146：537-542-
[4]HE X， WANG F， LIU H， et al. Fabrication of highly dispersed NiTiO 3 @TiO 2 yellow pigments with enhanced NIR reflectance[J]. Materials Letters，.[J].，, 2017, :208：82-85-
[5]XING Z， TAY S W， NG Y H， et al.Porous SiO2 hollow spheres as a solar reflective pigment for coatings[J].Acs Applied Materials ＆ Interfaces, 2017, 9(17):15103-
[6]沈航.反射隔热多彩涂料的制备及性能探讨[J].涂料工业, 2016, 46(2):6-12
[7]沈航， 王夏.多色系彩色反射隔热涂料的涂层设计及颜料选择[J].涂料工业, 2015, 45(9):24-31
[8]DORNELLES K， CARAM R， SICHIERI E. Natural weathering of cool coatings and its effect on solar reflectance of roof surfaces[J]. Energy Procedia，.[J].，, 2015, :78：1587-1592.-
[9]SLEIMAN M， BAN-WEISS G， GILBERT H E， et al.Soiling of building envelope surfaces and its effect on solar reflectance—Part I： Analysis of roofing product databases[J].Solar Energy Materials ＆ Solar Cells, 2011, 95(12):3385-99
[10]BERDAHL P， AKBARI H， LEVINSON R， et al.Weathering of roofing materials — An overview[J].Construction ＆ Building Materials, 2008, 22(4):423-33
[11]HUO H， ZHENG B， WANG M， et al.Vehicular air pollutant emissions in China： evaluation of past control policies and future perspectives[J].Mitigation ＆ Adaptation Strategies for Global Change, 2015, 20(5):719-733
[12]邵敏， 董东.我国大气挥发性有机物污染与控制[J].环境保护, 2013, 41(5):25-28
[13]Akira Fujishima， Xintong Zhang， Donald A.TrykTiO2 photocatalysis and related surface phenomena[J].Surface Science Reports, 2008, 63(12):515-582
[14]GAYA U I， ABDULLAH A H.Heterogeneous photocatalytic degradation of organic contaminants over titanium dioxide： A review of fundamentals， progress and problems[J].Journal of Photochemistry ＆ Photobiology C Photochemistry Reviews, 2008, 9(1):1-12
[15]WANG R， HASHIMOTO K， FUJISHIMA A， et al.Light-induced amphiphilic surfaces[J].Nature, 1997, 388(6641):431-432
[16]YANG H， ZHU S， PAN N.Studying the mechanisms of titanium dioxide as ultraviolet-blocking additive for films and fabrics by an improved scheme[J].Journal of Applied Polymer Science, 2010, 92(5):3201-3210
