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- W654867798 abstract "This study was conducted in order to develop novel chitosan/poly(ethyleneoxide)(PEO) blend films crosslinked by genipin as potential membranes for potentialmedical applications, such as controlled drug carriers and separation of proteins fromeleutherococcuss enticosus (ES).Genipin, a naturally occurring and non-toxic crosslinking reagent, was used to formchitosan and chitosan/PEO blend networks. Genipin is found in traditional Chinesemedicine and extracted from Gardenia fruit. Importantly,it overcomes the problem ofphysiological toxicity inherent in the use of common synthetic chemicals ascrosslinking agents.The miscibility and morphology of chitosan /PEO blends were examined by means ofdifferential scanning calorimetry (DSC), Fourier transform infrared spectroscopy(FT-IR) and small angle X-ray scattering (SAXS). The experimental results indicatethat the chitosan/PEO blends are miscible over the whole composition range. Aphenomenon was observed for chitosan/LPEO (lower molecular weight PEO) blends:when the composition of chitosan was less than 60% by weight, the melting pointsincreased as the composition of chitosan was increased. It is believed that there arestrong molecular interactions between chitosan molecules and the molecules in thecrystalline phase of LPEO in the chitosan ALPEO blends.FT-IR and UV spectra analysis of the crosslinking reaction of chitosan revealed thatthe hydroxyl groups (3400 cm-1) and the amide groups (1645 cm-) in chitosanparticipated actively in the reaction. SAXS results showed that a heterogeneousstructure exists in the chitosan/HPEO (or /LPEO) blend networks. Crosslinking bygenipin restricts crystallisation and leads to smaller crystals.The mechanical properties, the stability in water, the swelling behaviour andsurface properties of the films were also investigated. (Continues...)." @default.
- W654867798 created "2016-06-24" @default.
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- W654867798 date "2004-01-01" @default.
- W654867798 modified "2023-09-27" @default.
- W654867798 title "Chitosan/PEO blend films crosslinked by genipin as potential membranes for controlled drug release and protein separation" @default.
- W654867798 hasPublicationYear "2004" @default.
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