摘要
本文根据毛细管冷凝理论和湿度控制原理,计算了在给定的大气温度下最合理的调湿材料孔径,使得大气环境湿度保持为40%~70%之内。采用硅酸钠溶液和硫酸溶液为原料,通过溶胶-凝胶法制备了SiO_2纳米多孔体。利用SEM,XRD和氮吸附等方法对材料的结构进行了表征并通过实验验证了它的调湿特性。结果表明,本文所制备的SiO_2纳米多孔体的气孔大小为2~10 nm,且在相对湿度40%~70%之间具有良好的吸放水分功能。
In this paper, depending on the capillary condensation theory and the principle of humidity control, the reasonable pore diameter of the humidity control material at a given atmospheric temperature was calculated so that the atmospheric humidity was kept within 40% - 70%. SiO2 nanoporous bodies were prepared by sol - gel method using sodium silicate solution and sulfuric acid solution as raw materials. The structure of the material was characterized by SEM, XRD and N adsorption - desorption measurements and the humidity control characteristics of the material were verified by experiments. The results showed that the pore size of SiO2 nanoporous body was 2 - 10 nm and SiO2 nanoporous body had very superior humidity control ability between 40% and 70% of relative humidity.
出处
《合成技术及应用》
2017年第2期18-21,共4页
Synthetic Technology & Application
关键词
纳米多孔体
湿度
毛细管
冷凝
解吸
nanoporous body
humidity
capillary
condensation
desorption
