title: Antifouling coating of cellulose acetate thin films with polysaccharide multilayers.
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).
authors.affiliation: Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstraße 28, 8010 Graz, Austria. Electronic address: tamilselvan.mohan@uni-graz.at.
authors.forename: Tamilselvan
authors.initials: T
authors.lastname: Mohan
authors.affiliation: Institute for the Engineering and Design of Materials, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia. Electronic address: rupert.kargl@um.si.
authors.forename: Rupert
authors.initials: R
authors.lastname: Kargl
authors.affiliation: Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstraße 28, 8010 Graz, Austria.
authors.forename: Karin Eva
authors.initials: KE
authors.lastname: Tradt
authors.affiliation: Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstraße 28, 8010 Graz, Austria.
authors.forename: Martin R
authors.initials: MR
authors.lastname: Kulterer
authors.affiliation: Institute for the Engineering and Design of Materials, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia.
authors.forename: Matej
authors.initials: M
authors.lastname: Braćić
authors.affiliation: Institute for the Engineering and Design of Materials, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia.
authors.forename: Silvo
authors.initials: S
authors.lastname: Hribernik
authors.affiliation: Institute for the Engineering and Design of Materials, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia.
authors.forename: Karin
authors.initials: K
authors.lastname: Stana-Kleinschek
authors.affiliation: Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstraße 28, 8010 Graz, Austria.
authors.forename: Volker
authors.initials: V
authors.lastname: Ribitsch
mesh_terms: D000327:Adsorption; D002266:Carboxymethylcellulose Sodium / Q000737:chemistry*; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D048271:Chitosan / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D012710:Serum Albumin, Bovine / Q000737:chemistry; D013499:Surface Properties; D017155:Wettability
chemical_list: D012710:Serum Albumin, Bovine; C005062:acetylcellulose; D002482:Cellulose; D048271:Chitosan; D002266:Carboxymethylcellulose Sodium
keywords: BSA adsorption; Carboxymethyl cellulose; Cellulose acetate thin films; Chitosan; LbL method; Quartz crystal microbalance