硅粉对钛镍黄有机硅涂层热反射性能的影响
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摘要
为探索制备低明度热反射颜料的方法,选取不同粒径的硅粉与钛镍黄(Ti Ni Y)混合,再将混合颜料按一定的比例与有机硅树脂混合,制得建筑节能涂料。考察了硅粉粒径及其与钛镍黄的配比对涂层颜色及热反射性能的影响,利用X射线衍射仪、扫描电镜、色差仪和紫外/可见光/近红外分光光度计表征了原料的相组成及形貌,以及涂层的Lab色空间值和太阳光反射率。随着硅粉粒径减小,纯硅粉涂层的明度和太阳光反射率均逐渐升高,而混合颜料涂层的明度和太阳光反射率反而降低;随着硅粉含量增加,涂层的明度持续降低,但太阳光反射率下降到一定程度后不再降低。由某市售白色隔热底层(厚1.00 mm)与Ti Ni Y–Si混合颜料涂层(厚0.05 mm)组成的双层结构涂层的近红外反射率由Ti Ni Y–Si混合颜料单层涂层(厚1.00 mm)的42.41%升高到47.93%。可见硅粉能在降低钛镍黄涂层明度的同时,使反射率保持在一个较高的水平,而采用双层热反射涂层结构既可获得低明度,又能维持一定的热反射能力。
In order to explore the method for preparing low-luminosity thermal reflective pigment, a mixture of silicon powder and nickel antimony titanium yellow rutile(Ti Ni Y) was obtained, and then blended with organosilicon resin to prepare an architectural energy-saving paint. The effect of particle size of silicon powder and the mass ratio of it to Ti Ni Y on the color and thermal reflectivity of coating was studied. The phase structure and morphology of the raw materials, as well as the Lab color space values and solar reflectance of the coatings were characterized by X-ray diffractometer, scanning electron microscope, color difference meter, and ultraviolet/visible/near infrared spectrophotometer. The luminosity and solar reflectance of the coating prepared with pure silicon powder are increased gradually with the decreasing of its particle size, while those of the coating prepared with the pigment mixture are decreased. With the increasing of silicon powder content, the luminosity of the coatings is gradually decreased, while solar reflectance is decreased initially and then maintains a certain value constantly. The near-infrared reflectance of the double-layered coating system, which is composed of a 1 mmthick commercial white thermal reflection primer and a 0.05 mm-thick topcoat prepared with the Ti Ni Y–Si mixed pigment, is 47.93%, while that of the 1 mm-thick single-layered coating prepared with the Ti Ni Y–Si mixed pigment is 42.41%. The addition of silicon powder reduces the luminosity of the coating prepared with the Ti Ni Y pigment, while still keep its reflectivity at a relatively high level. The coating with a double-layered structure not only has a low luminosity, but also an improved thermal reflectivity.
In order to explore the method for preparing low-luminosity thermal reflective pigment, a mixture of silicon powder and nickel antimony titanium yellow rutile(Ti Ni Y) was obtained, and then blended with organosilicon resin to prepare an architectural energy-saving paint. The effect of particle size of silicon powder and the mass ratio of it to Ti Ni Y on the color and thermal reflectivity of coating was studied. The phase structure and morphology of the raw materials, as well as the Lab color space values and solar reflectance of the coatings were characterized by X-ray diffractometer, scanning electron microscope, color difference meter, and ultraviolet/visible/near infrared spectrophotometer. The luminosity and solar reflectance of the coating prepared with pure silicon powder are increased gradually with the decreasing of its particle size, while those of the coating prepared with the pigment mixture are decreased. With the increasing of silicon powder content, the luminosity of the coatings is gradually decreased, while solar reflectance is decreased initially and then maintains a certain value constantly. The near-infrared reflectance of the double-layered coating system, which is composed of a 1 mmthick commercial white thermal reflection primer and a 0.05 mm-thick topcoat prepared with the Ti Ni Y–Si mixed pigment, is 47.93%, while that of the 1 mm-thick single-layered coating prepared with the Ti Ni Y–Si mixed pigment is 42.41%. The addition of silicon powder reduces the luminosity of the coating prepared with the Ti Ni Y pigment, while still keep its reflectivity at a relatively high level. The coating with a double-layered structure not only has a low luminosity, but also an improved thermal reflectivity.
引文
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[3]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 and Buildings,2012,50(7):196-203.
[4]PISELLO A L,COTANA F,NICOLINI A,et al.Development of clay tile coatings for steep-sloped cool roofs[J].Energies,2013,6(8):3637-3653.
[5]叶峰.深色太阳热反射颜料制备及应用研究[D].广州:华南理工大学,2011.
[6]杨光,邓安仲,陈静波.中明度建筑节能涂层的制备及性能[J].电镀与涂饰,2017,36(6):301-305.
[7]曾国勋,杨建坤,李风,等.钛镍黄包覆空心玻璃微珠复合颜料的制备及其热反射性能[J].电镀与涂饰,2016,35(18):968-972.
[8]ZHANG D W,LI H Y,QIAN H C,et al.Double layer water-borne heat insulation coatings containing hollow glass microspheres(HGMs)[J].Pigment and Resin Technology,2016,45(5):346-353.
[9]李焕,李俊锋,李婵,等.矿物颜料颗粒度对色彩的影响[J].包装学报,2015,7(4):29-34.
[10]PAPADIMITRAKOPOULOS F,WISNIECKI P,BHAGWAGAR D E.Mechanically attrited silicon for high refractive index nanocomposites[J].Chemistry of Materials,1997,9(12):2928-2933.