摘要
根据表面热力学原理,本文导出从无孔固体吸附氮气的等温线计算其表面上吸附生成的液氮膜界面张力方程式;还导出计算固体中圆筒形间隙孔径方程式。计算结果表明:在77.3K,绝大多数无孔固体表面上吸附液氮膜的界面张力与液氮的界面张力相差很大;本文方法计算出固体中圆筒形间隙孔径比用Kelvin公式计算结果大。
According to the thermodynamic principle, in this paper two eauations have been derived, one is for the calculation of the interfacial tension of the liquid film formed by gas adsorption on nonporous solids from the adsorption isotherm, the other for the calculation of cylindrical mesopore radii in the porous solids. The calculated results show that there is an obvious difference between the interfacial tension of the bulk liquid nitrogen and that of the adsorbed liquid nitrogen film on most of nonporous solids at 77.3 K, and the results also show that the cylindrical mesopore radii calculated using Xhe present equation are larger than the ones obtained using the Kelvin formula.
出处
《中国纺织大学学报》
CSCD
1996年第1期73-78,共6页
Journal of China Textile University
关键词
固体
表面
界面张力
液氮膜
孔径
solid, surface, interfacial tension, liquid nitrogen film, mesopore radius
