Spontaneous adsorption on a hydrophobic surface governed by hydrogen bonding

Fuquan Dang, Takeshi Hasegawa, Vasudevanpillai Biju, Mitsuru Ishikawa, Noritada Kaji, Takao Yasui, Yoshinobu Baba

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Spontaneous adsorption from solution onto solid surface is a common phenomenon in nature, but the force that governs adsorption is still a matter of considerable debate.1,2 We found that surfactants and cellulose adsorb from solution onto a poly(methyl methacrylate) (PMMA) surface in an ordered and cooperative way governed by hydrogen bonding. The glucose rings of n-dodecyl-β-D-maltoside (DDM) and hydroxyethylcellulose (HEC) stand perpendicular to the surface, H-bond to the surface COOMe groups with their C=O and Me-O bonds parallel to the surface, and form a tight monolayer. The non-H-bonded COOMe groups orient their C=O bonds perpendicular to the surface. In contrast, the glucose rings of hydrophobically modified hydroxyethylcellulose (HMHEC) lie flat with the side chains perpendicular to the surface and H-bond to the perpendicular-oriented C=O groups. The non-H-bonded COOMe groups orient their C=O bonds parallel but Me-O bonds near-perpendicular to the surface for stabilizing HMHEC. The current work provides a detailed picture of how surface-active molecules interact with a solid surface and selfassemble into greatly different architectures.

Original languageEnglish
Pages (from-to)9296-9301
Number of pages6
JournalLangmuir
Volume25
Issue number16
DOIs
Publication statusPublished - Aug 18 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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  • Cite this

    Dang, F., Hasegawa, T., Biju, V., Ishikawa, M., Kaji, N., Yasui, T., & Baba, Y. (2009). Spontaneous adsorption on a hydrophobic surface governed by hydrogen bonding. Langmuir, 25(16), 9296-9301. https://doi.org/10.1021/la900850u