Differential superhydrophobicity and hydrophilicity on a thin cellulose layer

M.K. Sarkar, F. He, Jintu Fan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

20 Citations (Scopus)

Abstract

Here we have developed cellulosic materials (cotton fabric or paper) with differential superhydrophobicity and hydrophilicity on each side of the surfaces by coating with polyvinylidene fluoride and fluorinated silane molecules using electro-spraying. Such materials are advantageous in various textile and medical applications. Analysis of surface morphology indicated that, not only surface chemical property and roughness, but also particle diameter affects surface superhydrophobicity. Smaller particle diameter enhances superhydrophobicity, if the surface roughness and surface chemical property remain constant. By controlling these three factors, superhydrophobicity with a water contact angle of more than 160° can be achieved at one side of a thin cellulosic material while maintaining the hydrophilicity (contact angle is 0°) at the opposite side. © 2010 Elsevier B.V.
Original languageEnglish
Pages (from-to)5033-5039
Number of pages7
JournalThin Solid Films
Volume518
Issue number18
DOIs
Publication statusPublished - 1 Jul 2010

Keywords

  • Atomic force microscopy
  • Cellulosic materials
  • Electrostatic spray deposition
  • Hydrophilicity
  • Permeability
  • Superhydrophobicity
  • Water contact angle

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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