高等学校化学学报2025，Vol.46Issue(11)：1-10,10.DOI:10.7503/cjcu20250185
旋转包覆法构筑高反射低导热型HGM@TiO2@ZnO核-壳-壳材料
Fabrication of High-reflectance and Low-thermal-conductivity HGM@TiO2@ZnO Core-shell-shell Material via Rotational Coating
摘要
Abstract
Hollow glass microspheres(HGM)was utilized as the substrate and sequentially was coated with eggshell-like TiO2 and needle-like nano-ZnO through a rotational coating process and a two-step heterogeneous precipitation method,constructing a high-reflectance,low-thermal-conductivity core-shell-shell material HGM@TiO2@ZnO.Research demonstrates that the obtained HGM@TiO2@ZnO exhibits a hollow core structure that reduces heat transfer efficiency.The dual-shell structure,comprising high and low refractive index layers,induces multi-level reflection and scattering of light,while the cavity structures formed between the needle-like nano-ZnO further decrease the thermal conductivity of HGM@TiO2@ZnO,achieving a dual synergistic effect of"reflection-thermal insulation".Results indicate that the HGM@TiO2@ZnO material achieves an average solar reflectance up to 88.64%in the visible-near-infrared(380-2500 nm)range,representing improvements of 25.6%,6.2%,and 10.0%compared to HGM,HGM@TiO2,and physically blended material HGM&TiO2&ZnO,respectively.When HGM@TiO2@ZnO was added to an acrylic resin matrix at volume fraction of 40%,the resulting coating exhibited an average solar reflectance of 72.86%and a thermal conductivity as low as 0.08 W·m-1·K-1.Compared to coatings with the same volume fraction of HGM added to the acrylic resin,the reflectance increased by 5.4%,while the thermal conductivity decreased by 34%.Thus,this study elucidates the synergistic regulation mechanism of the core-shell-shell hierarchical structure on photothermal performance,providing theoretical support and material foundations for the development of high-efficiency thermal-reflective and insulating functional coatings.关键词
空心玻璃微球/核壳材料/太阳光反射率/导热系数/涂料Key words
Hollow glass microsphere/Core-shell material/Solar reflectance/Thermal conductivity/Coating分类
化学引用本文复制引用
齐文甲,赵开庆,吴刚,吾麦尔·亚森,童刚生..旋转包覆法构筑高反射低导热型HGM@TiO2@ZnO核-壳-壳材料[J].高等学校化学学报,2025,46(11):1-10,10.基金项目
上海市学术/技术研究带头人计划(批准号:23XD1431800)和上海高校青年教师资助培养计划项目(批准号:0234-A1-0100-25-QP034)资助. Supported by the Program of Shanghai Academic/Technology Research Leader,China(No.23XD1431800)and the Shanghai Young College Teachers Training Funding Program,China(No.0234-A1-0100-25-QP034). （批准号:23XD1431800）
