Preparation And Application Of Functional Materials Supported Chitosan

The molecular constitution of chitosan contained many functional groups including hydroxyl,acetyl,amino and so on.Multi-functional reaction property,stereochemical structure and chiral feature of chitosan were displayed.Especially,the application of chitosan in the aspect of biomedicine and environmnental friendly functional materials was focused owing to its physiological adaptabilities of animals and plants framework and organ,security,completely biodegradable,favorable hydrophilicity and renewable capacity.Nowadays one of the most noticeable research is to design new functional materials with chitosan with excellent performance and to extend the application field of these environmnental friendly materials.In this paper,new functional materials with chitosan(Cu(â…¡)-CS/MCM-41,CS/ZSM-5)were synthesized via different molecular sieve carrier and chitosan as well as its coordination compound.The synthetic material was characterizd by using XRD,IR, UV-Vis,BET and TG-DTA et al.The performance and influential factor of Cu(â…¡)-CS /MCM-41 catalysising H₂O₂ was detailedly discussed,which simulated hydrogen peroxidase catalysising H₂O₂.The influencing factors and optimization conditions of CS/ZSM-5 adsorption for Cr(â…¥)was studied.New supramolecular compounds of pyridines-polyoxometalate(4,4'-bipy-PW,4,4'-bipy-Cu(â…¡)- PW,2,2'-bipy-Cu(â…¡)-PW)were also synthesized.The research of supramolecular compounds of pyridincs-polyoxometalate degradated chitosan by catalytic oxidation was developed.The results showed that H₂O₂ could be efficiently decomposed by Cu(â…¡)-CS /MCM-41 catalysis.CS/ZSM-5 also showed better adsorption capability for Cr(â…¥)than the other adsorbents.The chitosan could be oxidative degradeted by using undissolved supramolecular compounds of pyridines-polyoxometalate as catalyst which could effectively catalyzed H₂O₂ in the system.As result,the water-solubility oligosaccharide was prepared.Besides,the catalysts were easy to separate from the system and could be repetitiveiy used.