Chitosan-modified bacterial cellulose

FIGURE 6.4 Bacterial cellulose yield (dry weight/interfacial surface area) by Acetobacter xylinum (AGR 60) in the coconut juice medium ( ) and coconut juice medium modified by chitosan MW 30,000 ( ) and chitosan MW 80,000 (A). 

The chitosan-modified bacterial cellulose, characterised by unique properties, i.e. bioactivity, biodegradability, biocompatibility, no toxicity and non-allergic action, coimected with good mechanical tenacity, has been found to be a great material for biomedical applications such as dressings for wound healing. ... 

Section II is devoted exclusively to polysaccharide systems, but includes a fairly broad variety of polymers and applications. Kennedy et al. describe some industrially important polysaccharides, while Morris covers various bacterial-derived polysaccharides used in the food and agricultural industries. Carraher et al. describe some tin modified dextrans in the third Chapter of this Section. Some acidic, heparin-like, polysaccharides are described in the following Chapter (Linhardt, et al.) then Kobayashi reveals some cellulose derivatives which form liposomes and membranes. The final three papers of this Section deal with chitin and chitosan systems. Alkaline chitosan gels are presented by Hirano et al. Kikuchi and Kubota then describe some polyelectrolytes derived from chitosan derivatives. Finally, Seo and lijima consider the sorption behavior of chitosan gels. 

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