摘要
以铁锌铬棕与二氧化钛混合物作为颜料,以硅溶胶-苯丙复合乳液为基料,制备了建筑节能涂层,并探究了2种颜料的质量比(分别为5:1、4:1、3:1、2:1、1:1、1:2、1:3、1:4和1:5)对涂层性能的影响。采用X射线衍射仪、扫描电镜、紫外/可见光/近红外分光光度计、红外辐射率测量仪及精密色差仪表征了颜料和涂层的晶体结构、截面形貌、反射比、半球发射率和Lab色空间值,采用红外灯模拟太阳热源测试了涂层的隔热性能。结果表明,制备的9种涂层均属于中明度涂层(40<L*<80)。铁锌铬棕含量减少使涂层的近红外反射比和明度增加,但对半球发射率的影响不大。当铁锌铬棕与二氧化钛的质量比为1:5时,所制涂层的近红外反射比最大,为0.660 1。涂覆该涂层的石棉水泥板的平衡温度比空白板低9.4°C,隔热效果明显,且各项性能符合JG/T 235–2014《建筑反射隔热涂料》的要求。
Architectural energy-efficient coatings were prepared using a mixture of iron zinc chrome brown and titania as pigments and silica sol-styrene-acrylic emulsion as binder. The effect of mass ratio, which is 5：1, 4：1, 3：1, 2：1, 1：1, 1：2, 1：3, 1：4 and 1：5 respectively, of the two kinds of pigment on coating properties was studied. The crystal structure, cross-section morphology, reflectance, hemispherical emittance and Lab color space value of pigments and coatings were characterized by X-ray diffractometer, scanning electron microscope, ultraviolet/visible light/near infrared spectrophotometer, infrared radiometer and precision colorimeter. The heat insulation performance of the coatings was tested by simulating sunlight using an infrared lamp. The results showed that all the 9 coatings have medium brightness with a L＊ between 40 and 80. Near infrared reflectance and brightness of coatings are increased with decreasing content of iron zinc chrome brown, while the hemispherical emittance is not much affected. The coating obtained with a mass ratio of iron zinc chrome brown to titania being 1：5 has the biggest near infrared reflectance of 0.6601. The asbestos cement board coated with it has an equilibrium temperature 9.4℃ lower than that of the blank one, showing a remarkable effect of thermal insulation. Furthermore, its properties meet the requirements of JG/T 235-2014 Architectural Reflective Thermal Insulation Coating.
作者
杨光
邓安仲
陈静波
YANG Guang DENG An-zhong CHEN Jing-bo(Logistic Engineering University of PLA, Chongqing 401311, China)
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2017年第6期301-305,I0002,共6页
Electroplating & Finishing
关键词
建筑涂层
铁锌铬棕
二氧化钛
反射比
半球发射率
明度
隔热
architectural coating
iron zinc chrome brown
titania
reflectance
hemispherical emittance
brightness
thermal insulation
