摘要
以六硼化镧(LaB6)粉体为基体材料,纳米二氧化钛(TiO2)为红外遮光剂,乙醇为溶剂,采用通过研磨超声法制备的不同质量分数TiO2掺杂的5%LaB6纳米分散液,通过原位法对聚乙烯醇缩丁醛(PVB)树脂进行改性,制成纳米TiO2–LaB6/PVB复合涂料,并通过淋涂法在玻璃表面制备成透明隔热复合薄膜。采用X射线粉末衍射(XRD)、傅里叶红外光谱(FT-IR)、场发射扫描电子显微镜(FESEM)、紫外-可见-红外光谱仪(UV-vis-NIR)等方法对复合薄膜的结构和性质进行分析,并测试其力学性能。结果表明,在PVB树脂合成阶段添加少量的TiO2和LaB6纳米粒子能够均匀分散在PVB树脂中,所制备的复合薄膜的红外阻隔率和紫外阻隔率都有明显提升。0.3%TiO2–5%LaB6/PVB薄膜的光学性能最理想,可见光透过率可达60%以上,紫外阻隔率超过65%,近红外阻隔率将近70%,与空白玻璃相比的平衡温差可达16~18℃,耐水性良好,铅笔硬度为3H,附着力为1级。
A transparent heat-insulating composite film was prepared on glass by the flow coating method from poly(vinyl butyrate)(PVB)resin,which was in-situ modified by ultrasonic grinding in ethanol with the dispersion of 5wt.%lanthanum hexaboride(LaB6)nanoparticles doped with different mass fractions of titania(TiO2)as an infrared opacifier.The structure and properties of the composite film were studies by X-ray powder diffractometry(XRD),Fourier-transfer infrared spectroscopy(FT-IR),field emission scanning electron microscopy(FESEM),and ultraviolet-visible-infrared spectroscopy(UV-vis-NIR),and their mechanical properties were tested.The results showed that the infrared and ultraviolet barrier properties of the composites were improved by uniform dispersion of a small amount of TiO2 and LaB6 nanoparticles in PVB resin which were added during the synthesis of PVB.The 0.3%TiO2-5%LaB6/PVB composite film had the best optical performance:visible light transmission>60%,UV blocking rate>65%,and near infrared blocking rate near 70%.The equilibrium temperature difference between the coated glass and blank glass reached 16-18℃.The composite film also presented good water resistance,a pencil hardness of 3H,an adhesion strength of 1 grade.
作者
阮文科
谢木标
彭兰贞
刘灿群
RUAN Wenke;XIE Mubiao;PENG Lanzhen;LIU Canqun(School of Chemistry and Chemical Engineering,Key Laboratory of Clean Energy Materials Chemistry of Guangdong Higher Education Institutes,Lingnan Normal University,Zhanjiang 524048,China;不详)
出处
《电镀与涂饰》
CAS
CSCD
北大核心
2020年第12期795-800,共6页
Electroplating & Finishing
基金
岭南师范学院2018年校级项目(1170918170)
岭南师范学院教育教学改革项目(LNSYJGXM1944)。
关键词
聚乙烯醇缩丁醛
二氧化钛
六硼化镧
原位复合涂膜
透光率
隔热
poly(vinyl butyrate)
titania
lanthanum hexaboride
in-situ composite film
transmittance
heat insulation
