Wang Fei, Liang Jinsheng, Tang Qingguo, Chen Gong, Chen Yalei
J Nanosci Nanotechnol. 2014 May;14(5):3861-7. doi: 10.1166/jnn.2014.8034.
Nano zinc oxide with a high refractive index has good thermal reflection performance, hollow glass microspheres have good thermal reflection and insulation performance, and sepiolite nanofibers with many nanostructural pores have good thermal insulation performance. The dispensability of nano zinc oxide in coating materials was improved by optimizing surface silane coupling agent modification process, leading to the good thermal reflection performance. The thermal insulation performance was improved by hollow glass microspheres and sepiolite nanofibers. On this basis, the thermal insulation coating materials were prepared by exploring the effect of amount, complex mode, and other factors of the above three kinds of functional fillers on the thermal reflection and insulation performance of coating materials. The results showed that the surface modification effect of nano zinc oxide was the best when the silane coupling agent addition was 6%. The reflection and insulation performance of the coatings were the best when the additions of modified nano zinc oxide, hollow glass microspheres, and sepiolite nanofibers were 3%, 4%, and 4%, respectively. Compared with the control coating materials, the thermal insulation effect was improved obviously, which was evaluated by the -13.5 degrees C increase of maximum temperature difference between the upper and the lower surfaces.
具有高折射率的纳米氧化锌具有良好的热反射性能，空心玻璃微珠具有良好的热反射和保温性能，而具有许多纳米结构孔隙的海泡石纳米纤维具有良好的保温性能。通过优化表面硅烷偶联剂改性工艺提高了纳米氧化锌在涂料中的分散性，从而使其具有良好的热反射性能。空心玻璃微珠和海泡石纳米纤维提高了保温性能。在此基础上，通过探究上述三种功能填料的用量、复配方式等因素对涂料热反射和保温性能的影响，制备了保温涂料。结果表明，硅烷偶联剂添加量为6%时，纳米氧化锌的表面改性效果最佳。改性纳米氧化锌、空心玻璃微珠和海泡石纳米纤维的添加量分别为3%、4%和4%时，涂料的反射和保温性能最佳。与对照涂料相比，保温效果明显提高，通过上下表面最大温差升高13.5℃来评估。
