Interfacial energy between adsorption layer of hydrogen-bonded molecular macrocluster and bulk solution

Research output: Contribution to conferencePaperpeer-review


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).

Original languageEnglish
Number of pages2
Publication statusPublished - 2005 Dec 1
Event54th SPSJ Symposium on Macromolecules - Yamagata, Japan
Duration: 2005 Sep 202005 Sep 22


Other54th SPSJ Symposium on Macromolecules


  • Adsorption layer
  • Hydrogen-bonding
  • Interfacial energy
  • Molecular macrocluster
  • Solid-liquid interface
  • Surface force curve

ASJC Scopus subject areas

  • Engineering(all)


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