MECHANISM OF WATER DIFFUSION INTO NONCROSSLINKED AND IONICALLY CROSSLINKED CHITOSAN MEMBRANES
Journal Title: Progress on Chemistry and Application of Chitin and its Derivatives - Year 2012, Vol 0, Issue
Abstract
Ionically crosslinked chitosan membranes were prepared and their swelling behaviour was analysed. Low‑molecular pentasodium tripolyphosphate (TPP) and/or high‑molecular sodium alginate (NaAlg) were used as ionic crosslinkers. Dynamic swelling of noncrosslinked (Ch) as well as singly (Ch/TPP, Ch/NaAlg) and doubly (Ch/NaAlg/TPP) crosslinked chitosan membranes was performed in buffered aqueous solutions of various pH to determine the mechanism of water diffusion into these hydrogels. It was stated out that mechanism of water diffusion into studied chitosan hydrogel membranes depends both on pH of swelling solution as well as on the type of membrane (type of crosslinker). The water transport mechanism was determined to be: i) Fickian or ‘Less Fickian’ diffusion, ii) non‑Fickian diffusion (anomalous diffusion) and iii) Case II or Super Case II diffusion.
Authors and Affiliations
Magdalena Gierszewska-Drużyńska, Jadwiga Ostrowska-Czubenko
Keywords
Related Articles
- EP ID EP73561
- DOI -
- Views 93
- Downloads 0
BIODISTRIBUTION OF DOXORUBICIN-LOADED SUCCINOYL CHITOSAN NANOPARTICLES IN MICE INJECTED VIA INTRAVENOUS OR INTRANASAL ROUTES
Chitosan (Chi) is an extremely promising natural biopolymer with remarkable potency for the development of drug and vaccine delivery nanosystems. Various Chi derivatives are used to form nanoparticles (NPs) with unique p...
PERVAPORATIVE INVESTIGATION OF ETHYL ALCOHOL DEHYDRATION
Pervaporative separation properties of crosslinked chitosan and alginate membrane on ethanol-water mixture at room temperature was studied. The influence of crosslinking agents on the separation properties were discussed...
BIOPOLYMER COMPOSITES BASED ON LIGNIN AND MICROCRYSTALLINE CHITOSAN
The article presents method of extracting lignin from hardwood and softwood after chemical treatment. Lignin fractions were extracted from black liquid (the by-product of pulp and paper industry), in a different reaction...
WETTABILITY OF HYBRID CHITOSAN/PHOSPHOLIPID COATINGS
Solution spreading and Langmuir-Blodgett/Schaefer techniques were used for preparation of chitosan/phospholipid (DPPC) films on air plasma treated polyethylene terephthalate (PET) plates. The surface wetting properties w...
EFFECT OF IONIC CROSSLINKING AGENTS ON SWELLING BEHAVIOUR OF CHITOSAN HYDROGEL MEMBRANES
Physically crosslinked chitosan hydrogels were prepared by treating chitosan with sulfuric acid, trisodium citrate, sodium tripolyphosphate and sodium alginate, respectively. The chemical structure of modified chitosan h...