Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, New Jersey 08854-8058, USA.
Langmuir. 2010 Aug 17;26(16):13021-7. doi: 10.1021/la1019247.
The Derjaguin-Broekhoff-de Boer theory of capillary condensation is employed to describe deformation of mesoporous solids in the course of adsorption-desorption hysteretic cycles. We suggest a thermodynamic model, which relates the mechanical stress induced by the adsorbed phase to the adsorption isotherm. Analytical expressions are derived for the dependence of the solvation pressure on the vapor pressure. The proposed method provides a description of nonmonotonic hysteretic deformation during capillary condensation without invoking any adjustable parameters. The method is showcased drawing on the examples of literature experimental data on adsorption deformation of porous glass and SBA-15 silica.
德贾林-布罗克豪夫-德波尔毛细凝结理论被用于描述中孔固体在吸附-解吸滞后循环过程中的变形。我们提出了一个热力学模型，将吸附相引起的机械应力与吸附等温线联系起来。推导出了溶剂化压力随蒸汽压力的依赖关系的解析表达式。所提出的方法在不引入任何可调参数的情况下，提供了对毛细凝结过程中非线性滞后变形的描述。该方法通过多孔玻璃和 SBA-15 二氧化硅的文献实验数据进行了展示。
