Wettability and surface composition of partly and fully regenerated cellulose thin films from trimethylsilyl cellulose

Tamilselvan Mohan, Rupert Kargl*, Aleš Doliška, Alenka Vesel, Stefan Köstler, Volker Ribitsch, Karin Stana-Kleinschek

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

The wettability and surface free energy (SFE) of partly and fully regenerated cellulose model surfaces from spin coated trimethylsilyl cellulose were determined by static contact angle (SCA) measurements. In order to gain detailed insight into the desilylation reaction of the surfaces the results from SCA measurements were compared with data from other surface analytical methods, namely thickness measurements, X-ray photoelectron spectroscopy (XPS) and attenuated total reflectance infrared spectroscopy (ATR-IR). Additionally, the influence of ultra high vacuum treatment (UHV) during XPS measurements on the water wettability and surface morphology of regenerated cellulose thin films was investigated. The wetting of polar and non-polar liquids increased with prolonged regeneration time, which is reflected in the higher SFE values and polarities of the films. After UHV treatment the water SCA of partly regenerated films decreases, whereas fully regenerated cellulose shows a higher water SCA. Therefore it is assumed that volatile desilylation products tend to adsorb on partly regenerated films, which strongly influences their wettability.

Original languageEnglish
Pages (from-to)604-610
Number of pages7
JournalJournal of colloid and interface science
Volume358
Issue number2
DOIs
Publication statusPublished - 15 Jun 2011
Externally publishedYes

Keywords

  • AFM
  • ATR-IR
  • Cellulose model surfaces
  • Spin coating
  • Static contact angle
  • Surface free energy
  • TMSC
  • Wettability
  • XPS

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

Fingerprint Dive into the research topics of 'Wettability and surface composition of partly and fully regenerated cellulose thin films from trimethylsilyl cellulose'. Together they form a unique fingerprint.

  • Cite this