岩石矿物学杂志2009，Vol.28Issue(6)：653-660,8.
多孔结构无机材料比表面积和孔径分布对调湿性的影响
The effect of the specific surface area and pore radius distribution of inorganic materials on the capacity of absorbing and desorbing moisture in the air
摘要
Abstract
With the aid of the N_2 isothermal adsorption technology, the authors calculated the specific surface area and the pore radius distribution of sepiolite, zeolite, diatomite and attapulgite by using the BET method, and the results snowed that the specific surface areas were 81.56, 2.46, 1.68 and 187.70 m~2/g, whereas the pore radius distribution values were 8.53, 18.20, 31.57 and 11.79 run, respectively. Their maximal absorbing moisture values were 5.6%, 2.2%, 1.8% and6.0%, respectively, at 25 ℃ and 75% relative humidity. After the saturation of the absorbing moisture, the samples of these four kinds of minerals were put in the environment of 25C and 35% RH to make moisture discharge. The capacities of desorbing moisture were 4.4%, 1.8%, 1.6% and 5.0% , respectively. A comparison of the specific surface area and pore radius distribution of the four inorganic porous minerals with their capacities of absorbing and desorbing moisture in the air demonstrates that the sample whose specific surface area is relatively large and whose pore radius distribution is consistent with the computation result of Kelvin formula, such as sepiolite, has comparatively strong absorbing and desorbing moisture capacity in the air.关键词
孔结构矿物材料/比表面积/孔径分布/调湿性Key words
inorganic porous material/ specific surface area/ pore radius distribution/ relative humidity controlling引用本文复制引用
冀志江,侯国艳,王静,张连松..多孔结构无机材料比表面积和孔径分布对调湿性的影响[J].岩石矿物学杂志,2009,28(6):653-660,8.基金项目
十一五科技支撑计划重大资助项目(2006BAJ02A09-3) （2006BAJ02A09-3）
