1995
DOI: 10.1080/10601329508009346
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On the Modification of Chitosan Through Grafting

Abstract: The feasibility of grafting poly( methyl acrylate) and poly[ 1-(methoxycarbonyl) ethylene] onto chitosan, poly-P( 1 +4)-2-amino-2-deoxy-D-glucose, was investigated. The grafting reaction was carried out in aqueous solution by using ferrous ammonium sulfate (FAS) in combination with H,O, as redox initiator. The effects of such reaction variables as chitosan, monomer and initiator concentrations, reaction time, and reaction temperature were determined. Through this study the grafting reaction could be optimized.… Show more

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Cited by 38 publications
(24 citation statements)
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“…Generally, the biopolymers chitin and chitosan are insoluble and do not form film materials. However, when grafted with poly(acrylic acid) or polyacrylamide, they become insoluble, are able to form flakes with a nearly flat surface, and show functional groups that can influence crystal nucleation and growth [18][19][20][21][22]. To our best knowledge, the spatial distribution of polar functional groups, that is, the local charge density, is of crucial importance for the nucleation and determines the orientation of crystals.…”
Section: Introductionmentioning
confidence: 98%
“…Generally, the biopolymers chitin and chitosan are insoluble and do not form film materials. However, when grafted with poly(acrylic acid) or polyacrylamide, they become insoluble, are able to form flakes with a nearly flat surface, and show functional groups that can influence crystal nucleation and growth [18][19][20][21][22]. To our best knowledge, the spatial distribution of polar functional groups, that is, the local charge density, is of crucial importance for the nucleation and determines the orientation of crystals.…”
Section: Introductionmentioning
confidence: 98%
“…3 Silylating agents of the general formula (CH 3 O) 3 SiORONH 2 present two reactive functional groups: the amine ONH 2 , and methoxy OOCH 3 groups. Under the influence of specified amounts of water the latter group suffers hydrolysis to undergo polycondensation to finally form polysiloxane OSiOSiO groups through a sol-gel process.…”
Section: Introductionmentioning
confidence: 99%
“…We have also used Fenton's reagent (H 2 O 2 /Fe 2+ ) for grafting poly(methyl acrylate) onto chitosan. In both cases the grafted chitosan showed enhanced thermal stability 40) . Recently, by grafting vinyl pyrrolidone, we were able to carry out the reactions in a homogeneous phase 21) .…”
Section: Introductionmentioning
confidence: 99%
“…As we have previously observed, the extent of grafting vinyl monomers onto cellulose, chitin, chitosan, etc. is very sensitive towards reaction conditions 16,21,39,40) . Therefore, a systematic study of the effect of different reaction variables on grafting of acrylic acid onto chitosan, is presented in this work.…”
Section: Introductionmentioning
confidence: 99%