Synthesis Of Amine Functionalized Cellulose Nanocrystals: Optimization And Characterization

dc.creatorAkhlaghi
dc.creatorSeyedeh Parinaz; Zaman
dc.creatorMasuduz; Mohammed
dc.creatorNishil; Brinatti
dc.creatorCesar; Batmaz
dc.creatorRasim; Berry
dc.creatorRichard; Loh
dc.creatorWatson; Tam
dc.creatorKam Chiu
dc.date2015-MAY
dc.date2016-06-07T13:18:10Z
dc.date2016-06-07T13:18:10Z
dc.date.accessioned2018-03-29T01:38:35Z
dc.date.available2018-03-29T01:38:35Z
dc.identifier
dc.identifierSynthesis Of Amine Functionalized Cellulose Nanocrystals: Optimization And Characterization. Elsevier Sci Ltd, v. 409, p. 48-55 MAY-2015.
dc.identifier0008-6215
dc.identifierWOS:000354570100008
dc.identifier10.1016/j.carres.2015.03.009
dc.identifierhttp://www.sciencedirect.com/science/article/pii/S0008621515000865
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/242455
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1306153
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionA simple protocol was used to prepare amine functionalized cellulose nanocrystals (CNC-NH2). In the first step, epichlorohydrin (EPH) was reacted with ammonium hydroxide to produce 2-hydroxy-3-chloro propylamine (HCPA). In the next step, HCPA was grafted to CNC using the etherification reaction in an organic solution media. Various reaction parameters, such as time, temperature, and reactant molar ratio were performed to determine the optimal reaction conditions. The final product (CNC-NH2(T)) was dialyzed for a week. Further purification via centrifugation yielded the sediment (CNC-NH2(P)) and supernatant (POLY-NH2). The presence of amine groups on the surface of modified CNC was confirmed by FTIR and the amine content was determined by potentiometric titration and elemental analysis. A high amine content of 2.2 and 0.6 mmol amine/g was achieved for CNC-NH2(T) and CNC-NH2(P), respectively. Zeta potential measurements confirmed the charge reversal of amine CNC from positive to negative when the pH was increased from 3 to 10. The flocculation of amine functionalized CNC due to its interactions with a negatively charged surfactant namely, sodium dodecyl sulfate (SDS) was investigated at pH 4. It showed promising results for applications, such as in flocculation of fine dispersions in water treatment. This simple and versatile synthetic method to produce high amine content CNC can be used for further conjugation as required for various applications. (C) 2015 Elsevier Ltd. All rights reserved.
dc.description409
dc.description
dc.description
dc.description48
dc.description55
dc.descriptionCelluForce
dc.descriptionAboraNano
dc.descriptionCFI
dc.descriptionNSERC
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionCAPES [PVE 128/2013]
dc.description
dc.description
dc.description
dc.languageen
dc.publisherELSEVIER SCI LTD
dc.publisher
dc.publisherOXFORD
dc.relationCARBOHYDRATE RESEARCH
dc.rightsembargo
dc.sourceWOS
dc.subjectPolymers
dc.subjectDelivery
dc.titleSynthesis Of Amine Functionalized Cellulose Nanocrystals: Optimization And Characterization
dc.typeArtículos de revistas


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