Antifouling coating of cellulose acetate thin films with polysaccharide multilayers

Tamilselvan Mohan*, Rupert Kargl, Karin Eva Tradt, Martin R. Kulterer, M. Bračič, Silvo Hribernik, Karin Stana Kleinschek, Volker Ribitsch

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

In this investigation, partially deacetylated cellulose acetate (DCA) thin films were prepared and modified with hydrophilic polysaccharides with the layer-by-layer (LbL) technique. As polysaccharides, chitosan (CHI) and carboxymethyl cellulose (CMC) were used. DCA thin films were manufactured by exposing spin coated cellulose acetate to potassium hydroxide solutions for various times. The deacetylation process was monitored by attenuated total reflectance-infrared spectroscopy, film thickness and static water contact angle measurements. A maximum of three bilayers was created from the alternating deposition of CHI and CMC on the DCA films under two different conditions namely constant ionic strengths and varying pH values of the CMC solutions. Precoatings of CMC at pH 2 were used as a base layer. The sequential deposition of CMC and CHI was investigated with a quartz crystal microbalance with dissipation, film thickness, static water contact angle and atomic force microscopy (AFM) measurements. The versatility and applicability of the developed functional coatings was shown by removing the multilayers by rinsing with mixtures containing HCl/NaCl. The developed LbL coatings are used for studying the fouling behavior of bovine serum albumin (BSA).

Original languageEnglish
Pages (from-to)149-158
Number of pages10
JournalCarbohydrate Polymers
Volume116
DOIs
Publication statusPublished - 13 Feb 2015
Externally publishedYes

Keywords

  • BSA adsorption
  • Carboxymethyl cellulose
  • Cellulose acetate thin films
  • Chitosan
  • LbL method
  • Quartz crystal microbalance

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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