Some Studies Of Crosslinking Chitosan-glutaraldehyde Interaction In A Homogeneous System.

dc.creatorMonteiro, O A
dc.creatorAiroldi, C
dc.date1999-Nov
dc.date2015-11-27T12:19:43Z
dc.date2015-11-27T12:19:43Z
dc.date.accessioned2018-03-29T00:53:47Z
dc.date.available2018-03-29T00:53:47Z
dc.identifierInternational Journal Of Biological Macromolecules. v. 26, n. 2-3, p. 119-28, 1999-Nov.
dc.identifier0141-8130
dc.identifier
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/10517518
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/194435
dc.identifier10517518
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1294668
dc.descriptionChitosan dissolved in acetic acid reacted with glutaraldehyde solution, ranging in concentration from 0.10 to 25.0 x 10(-2) mol dm3. The modified polymers were characterized by means of carbon, hydrogen and nitrogen elemental analysis, scanning electron microscopy, X-ray diffractometry, 13C nuclear magnetic resonance (NMR), infrared and Raman spectroscopies. The uptake of metallic cations in aqueous medium was checked through copper. The obtained data from 13C NMR, infrared and Raman spectroscopies evidenced the formation of an ethylenic double bond in the chitosan glutaraldehyde interaction. These data suggest that free pendant amine groups of chitosan polymer interact with the aldehydic group of the glutaraldehyde to form stable imine bonds, due to the resonance established with adjacent double ethylenic bonds. The crosslinking is formed by the nonuniform length of chains and by terminal unities. The crosslinking formation can involve two chitosan unities belonging, or not, to the same polymeric chain. The sequence of reactions was established for a chitosan:glutaraldehyde molar proportion of 1:20. The degree of crystallinity and particle size decreased as the amount of glutaraldehyde was increased in the polymer. Physical and chemical properties are not just affected for the chitosan glutaraldehyde reaction, but are also affected strongly by the dissolution of the natural chitosan.
dc.description26
dc.description119-28
dc.languageeng
dc.relationInternational Journal Of Biological Macromolecules
dc.relationInt. J. Biol. Macromol.
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectAcetic Acid
dc.subjectAcetylation
dc.subjectAdsorption
dc.subjectCarbon
dc.subjectCarbon Isotopes
dc.subjectChitin
dc.subjectChitosan
dc.subjectCross-linking Reagents
dc.subjectGlutaral
dc.subjectHydrogen
dc.subjectMagnetic Resonance Spectroscopy
dc.subjectMicroscopy, Electron, Scanning
dc.subjectNitrogen
dc.subjectSpectrometry, X-ray Emission
dc.subjectSpectrum Analysis
dc.subjectVibration
dc.titleSome Studies Of Crosslinking Chitosan-glutaraldehyde Interaction In A Homogeneous System.
dc.typeArtículos de revistas


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