• 作者： Hsu, Ching-Tien; Lin, Shi-Yow
• 中文摘要： 本文探討正癸醇在水溶液中與空氣-水界面間之質傳機構。本研究使用平衡張力數據、擴散係數值和一般化的吸附模式,藉由理論模擬來檢驗Lin 等人(1995)由實驗測得之正癸醇的吸附動力學和吸/脫附動力常數值。本模擬獲得下列結果:(1)因為界劑分子間凡得瓦力之影響,而存在著下述之可能性:正癸醇分子由水溶液中吸附至一瞬間生成之氣-液界面為一擴散控制程序,而由一瞬間被壓縮之液氣-界面脫附至水中時為一混合控制程序; (2)Lin等人由實驗所獲得之吸/脫常數值,確實落於上述之區域內,故其測量結果應屬合理。
• 英文摘要： The adsorption kinetics of 1-decanol was investigated by measuring the equilibrium and dynamic surface tension profiles by Lin et al. (1995). From the relaxation of surface tension for the adsorption onto a clean air-water interface and the desorption out of a compressed interface, the diffusivity and the kinetic rate constants of 1-decanol were evaluated. In this work, the adsorption kinetics for 1- decanol is examined theoretically. Using the equilibrium data of surface tension, diffusivity and the generalized Frumkin adsorption model, the relaxations of surface tension of the adsorption and desorption processes are simulated. Novel regions, where the adsorption onto a clean interface is of diffusion-control and the desorption out of a compressed interface is mixed-controlled, at different compression ratios are identified for 1-decanol. This is resulted from the presence of cohesive intermolecular forces between the decanol molecules adsorbed at the air-water interface. The data of kinetic rate constants evaluated by Lin et al. are also compared with the novel regions. Decanol is verified theoretically that the adsorption onto a clean interface is diffusion-controlled and the desorption out of a compressed interface is of diffusive-kinetic control.
• 中文關鍵字： 吸附動力學; 擴散; 表面張力; 界面; 空氣; 水
• 英文關鍵字： Adsorption Kinetics; Diffusion; Surface Tension; Interface; Air; Water