Studies of cross-linking reaction on chitosan fiber with glyoxal

Yang, Qing; Dou, Fengdong; Liang, Biao; Shen, Qing

doi:10.1016/j.carbpol.2004.09.013

Cited by 154 publications

(87 citation statements)

References 22 publications

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“…[26] In other words, intermolecular or intramolecular C¼N linkages of collagen via DAS bridges occurs ( Figure 3). However, the peak at about 1 660 cm À1 for C¼N (Schiff's base) [32] was not observed in our experiments. This is because the stronger amide I bands masks the band.…”

Section: Formation and Characterization Of The Cryogelcontrasting

confidence: 40%

Collagen Cryogel Cross‐Linked by Dialdehyde Starch

Liu

Cheng

et al. 2010

Macro Materials & Eng

121

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A 3D spongy collagen cryogel was prepared using DAS as the cross‐linker. FTIR and CD studies demonstrate that crosslinking is achieved through the reaction of the DAS aldehyde groups with the free amino groups in collagen without affecting the triple helix of collagen. SEM demonstrates that the cryogel has a heteroporous structure with interconnecting pores. DSC measurements reveal that the cryogels have improved thermal stability in comparison with pure collagen. Moreover, the ESR shows that the water uptake of the cryogel decreases with DAS content. Evaporation tests indicate that the cryogel can hold moisture for a long time. Since both collagen and DAS are nontoxic and the resultant cryogel is blood‐compatible, the cryogel is expected to be useful, e.g., as wound dressing.magnified image

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Section: Formation and Characterization Of The Cryogelcontrasting

confidence: 40%

Collagen Cryogel Cross‐Linked by Dialdehyde Starch

Liu

Cheng

et al. 2010

Macro Materials & Eng

121

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“…There are several chitosan cross-linking agents already described such as genipin [10], glyoxal [11], epichlorohydrin [12], and ascorbic acid [13]. In this study, glutaraldehyde was chosen as cross-linking agent.…”

Section: Introductionmentioning

confidence: 99%

An improved method for preparing glutaraldehyde cross-linked chitosan–poly(vinyl alcohol) microparticles

2012

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The features of microparticles, as size, surface structure, and morphology, depend, mainly, on the methodology used for their preparation. Emulsion polymerization techniques are undoubtedly among the most widespread. However, the use of toxic, volatile organic solvents represents a major disadvantage, namely, because of environmental issues. In this study, we prepared glutaraldehyde crosslinked chitosan-poly(vinyl alcohol) microparticles by an improved water-in-oil emulsion technique using corn oil as organic phase. The application of this polymeric blend as microparticle is scarcely investigated. As resulting of the procedure here presented, spherical and smooth surface microparticles were obtained, with mean diameter of 16 lm. The cross-linking reaction between the aldehyde and the amino or the hydroxyl groups formed either an imine (Schiff's base) or an acetal bond, respectively, as analyzed by infrared spectroscopy. The microparticles here described did not present cytotoxic potential. Accordingly, this study can find promising and successful application in biotechnology.

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“…Some chemical cross-linking agents used for poly(vinyl alcohol) and chitosan are formaldehyde [21,22], acetaldehyde [23], glutaraldehyde [24], epichlorohydrine [25], genipin [26], glyoxal [27], ascorbic acid [28], etc. and physical cross linking agents are methanol, ethanol, γ-radiation induced cross linking, γ-radiation followed by freeze-thawing [29,30] etc.…”

Section: Fabrication and Characterization Of Biodegradable Poly(vinylmentioning

confidence: 99%

Fabrication and Characterization of Biodegradable Poly(vinyl alcohol)/Chitosan Blends

Pokhrel¹,

Adhikari²,

Yadav³

2017

Asian J. Chem.

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Poly(vinyl alcohol)/chitosan (PVA/CS) blends were prepared by solution casting method using glutaraldehyde as a cross linking agent. Fourier transform infrared spectroscopy (FTIR) and microhardness technique were employed to study the intermolecular interactions between constituents of polymer blends and mechanical properties respectively. The degradation properties of PVA/CS films were studied by composting method. FTIR spectra of poly(vinyl alcohol) and PVA/CS blends showed some variations in the absorption bands which reflected interactions between the components of blends. The mechanical stiffness of PVA/CS blends was enhanced by chitosan upto 40 % loading and it was found optimum composition for the maximum enhancement of mechanical properties of the blend. The degradation rate of blends was found increased with the increase in chitosan content.

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Studies of cross-linking reaction on chitosan fiber with glyoxal

Cited by 154 publications

References 22 publications

Collagen Cryogel Cross‐Linked by Dialdehyde Starch

Collagen Cryogel Cross‐Linked by Dialdehyde Starch

An improved method for preparing glutaraldehyde cross-linked chitosan–poly(vinyl alcohol) microparticles

Fabrication and Characterization of Biodegradable Poly(vinyl alcohol)/Chitosan Blends

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