Recently, we have found that alcohols, carboxylic acids and amides adsorbed on the silica surface in non-polar liquid such as cyclohexane and benzene form ordered structures extending to several tens of nanometer through hydrogen bonding between the surface silanol groups and the adsorbed molecules as well as between the adsorbed molecules (surface molecular macrocluster). Surface forces measurement has revealed that the strong long range attraction appears from distances about twice of the macrocluster layer thickness, indicating that the contact of adsorption layers brings about the long range attraction due to the interfacial energy (γ) between the adsorption layer of molecular macroclusters and the bulk solution. In this study, we derived the equation which represents the long range interaction force caused by the contact of the adsorption layers. For the interface between the adsorption layer of methanol macrocluster and the bulk solution, we obtained γ = 7.2 ± 0.3 mN/m which is one order larger than that of methanol/cyclohexane interface in phase separation (0.6 mN/m).
|出版ステータス||Published - 2005 12 1|
|イベント||54th SPSJ Symposium on Macromolecules - Yamagata, Japan|
継続期間: 2005 9 20 → 2005 9 22
|Other||54th SPSJ Symposium on Macromolecules|
|Period||05/9/20 → 05/9/22|
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