The crosslinking of chitosan fibers

Wei, Y. C.; Hudson, Samuel M.; Mayer, Jean; Kaplan, David L.

doi:10.1002/pola.1992.080301013

Cited by 198 publications

(124 citation statements)

References 4 publications

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“…The advantage of genipin over GA is that it is 5000-10 000 times less cytotoxic than GA, shown through in vitro studies with 3T3 fibroblasts using the MTT assay [21]. ECH is a temperature-dependent crosslinker, which at temperatures of 408C and below binds to the NH 2 group, but above 408C also crosslinks with primary OH groups in the CS films [11,19,[22][23][24]. HDACS is a water-soluble and stable blocked-diisocyanate, which forms urea linkages after crosslinking with the NH 2 group of CS at basic pH [16,17].…”

Section: Introductionmentioning

confidence: 99%

New crosslinkers for electrospun chitosan fibre mats. Part II: mechanical properties

Donius

Kiechel

Schauer

et al. 2013

J. R. Soc. Interface.

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Few studies exist on the mechanical performance of crosslinked electrospun chitosan (CS) fibre mats. In this study, we show that the mat structure and mechanical performance depend on the different crosslinking agents genipin, epichlorohydrin (ECH), and hexamethylene-1,6-diaminocarboxysulphonate (HDACS), as well as the post-electrospinning heat and base activation treatments. The mat structure was imaged by field emission scanning electron microscopy and the mechanical performance was tested in tension. The elastic modulus, tensile strength, strain at failure and work to failure were found to range from 52 to 592 MPa, 2 to 30 MPa, 2 to 31 per cent and 0.041 to 3.26 MJ m 23 , respectively. In general, neat CS mats were found to be the stiffest and the strongest, though least ductile, while CS -ECH mats were the least stiff, weakest, but the most ductile, and CS -HDACS fibre mats exhibited intermediary mechanical properties. The mechanical performance of the mats is shown to reflect differences in the fibre diameter, number of fibre-fibre contacts formed within the mat, as well as varying intermolecular bonding and moisture content. The findings reported here complement the chemical properties of the mats, described in part I of this study.

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Section: Introductionmentioning

confidence: 99%

New crosslinkers for electrospun chitosan fibre mats. Part II: mechanical properties

Donius

Kiechel

Schauer

et al. 2013

J. R. Soc. Interface.

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“…The membranes were then washed and stored in Milli-Q water at 4 °C 13 . The molar ratio of epichlorohydrin/NH 2 was 0.02.…”

Section: Chemical Modifications Of Membranesmentioning

confidence: 99%

“…The ratio of crosslinking agent and amino groups can have influence in the chromium adsorption properties, but it was not quantitively investigated in this study. The different molar ratio values of glutaraldehyde/amino groups and epichlorohydrin/amino groups were chosen based in the literature [13][14] as indicated to maximize the Cr(VI) adsorption capacity.…”

Section: Chemical Modifications Of Membranesmentioning

confidence: 99%

Dynamic adsorption of chromium ions onto natural and crosslinked chitosan membranes for wastewater treatment

et al. 2010

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Water pollution with heavy metals is a matter of major concern for public health and also for natural resource management. The present study investigated the effect of chemical modifications on biopolymeric adsorbents (based on chitosan membranes) for chromium removal using fixed-bed dynamic adsorption technique. Parameters such as flow rate, initial concentration and crosslinking agents were evaluated, from a practical point-of-view, in order to optimize the adsorption capacity of natural, glutaraldehyde and epichlorohydrin crosslinked chitosan membranes. The adsorption capacity of natural and epiclorohydrin-crosslinked chitosan membranes were very close to each other; however, glutaraldehyde-crosslinked chitosan membranes presented nearly twice the adsorption capacity compared to the other membranes, being the most promising adsorbent in such mass-transfer systems.

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“…Chitosan is a very abundant biopolymer obtained from the alkaline deacetylation of chitin, which is ubiquitous in the exoskeletons of crustaceans, the cuticles of insects and the cell walls of most fungi [28]. Chitosan functionalization is based on the presence of amino groups, which easily react with electrophilic reagents such as aldehydes, acid chlorides, acid anhydrides and epoxides [29][30][31][32]. Chitosan is a chiral polyamine and exhibits good flexibility, insolubility in many solvents and an inherent chirality and affinity for metal ions [33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Chitosan Aerogel Catalyzed Asymmetric Aldol Reaction in Water: Highly Enantioselective Construction of 3-Substituted-3-hydroxy-2-oxindoles

Hui

Liu

et al. 2016

Catalysts

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The crosslinking of chitosan fibers

Cited by 198 publications

References 4 publications

New crosslinkers for electrospun chitosan fibre mats. Part II: mechanical properties

New crosslinkers for electrospun chitosan fibre mats. Part II: mechanical properties

Dynamic adsorption of chromium ions onto natural and crosslinked chitosan membranes for wastewater treatment

Chitosan Aerogel Catalyzed Asymmetric Aldol Reaction in Water: Highly Enantioselective Construction of 3-Substituted-3-hydroxy-2-oxindoles

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