SURFACE PROPERTIES OF CHITOSAN ACETATE, POLYACRYLAMIDE AND THEIR MIXTURES
Journal Title: Progress on Chemistry and Application of Chitin and its Derivatives - Year 2013, Vol 0, Issue
Abstract
The surface properties of chitosan acetate (ChA), polyacrylamide (PAM) and ChA/PAM mixtures have been investigated by the tapping-mode atomic force microscopy (AFM) and monitored by contact angle measurements. Chitosan is blended with polyacrylamide in acetic acid solution and this solution is cast to prepare the mixture film. Measurements of the contact angle for two different liquids (diiodomethane and glycerol) on the surface of chitosan acetate. The surface free energy (γs) as well as dispersive (gsd) and polar (gsp) components were calculated from contact angle values by Owens-Wendt methods using an appropriate computer program. The values of polar and dispersive components of surface free energy show that PAM films are more polar than chitosan acetate films. In the case of ChA/PAM mixtures, the values of surface free energy and polar component are reduced significantly compared with pure polymers. This behavior indicates rather hydrophobic character of this surface. The changes of topography images were considered by determining the root mean square (RMS) deviation in the image data. The study of blends by AFM showed a completely different morphology when compared with pure components. The roughness of blends increases with the increase of ChA content. This may indicates a strong interaction between the polymeric components.
Authors and Affiliations
Katarzyna Lewandowska
Keywords
Related Articles
- EP ID EP73476
- DOI -
- Views 77
- Downloads 0
STRUCTURAL AND SWELLING PROPERTIES OF HYDROGEL MEMBRANES BASED ON CHITOSAN CROSSLINKED WITH GLUTARALDEHYDE AND SODIUM TRIPOLYPHOSPHATE
Chemically and physically crosslinked chitosan hydrogel membranes were obtained by treatment of chitosan (Ch) with glutaraldehyde (GA) and with GA and subsequently with sodium tripolyphosphate (TPP). The formation of cov...
CYCLIC SORPTION AND DESORPTION OF REACTIVE DYES ONTO CHITOSAN BEADS
The study was undertaken to analyze cyclic sorption and desorption of four reactive dyes: Reactive Yellow 84, Reactive Red 11, Reactive Black 5 and Reactive Black 8. onto chitosan beads. In all experimental series, dye a...
THE INVESTIGATIONS ON PROCESS TYPE INFLUENCE ON METHYL VIOLET ADSORPTION ON CHITIN AND CHITIN DEACETYLATION PRODUCTS
The aim of this work was to a study various adsorption processes of methyl violet (model compound of aniline dye) on chitin and chitin deacetylation products. Two types of adsorption processes - batch and continuous - we...
RESEARCH OF PHARMACEUTICAL PROPERTIES OF HYDROPHILIC POWDERS CONTAINING LACTIC ACID COMPLEXED WITH CHITOSAN
Hydrophilic powders passing gels containing lactic acid complexed with chitosan at a stoichiometric ratio of 1:1 and 8:1 revealed pH ranged from 3.92 to 4.44 and 2.36 to 2.84. Rheological studies demonstrated that the re...
PRELIMINARY STUDIES ON THE USABLE PROPERTIES OF INNOVATIVE WOUND DRESSINGS
There is endless and growing demand on a novel and innovative wound dressings, which except basic protective performance accelerate the process of wounds healing and/or replace the patient skin function. The studies on t...