Crosslinking of chitosan membranes using glutaraldehyde: Effect on ion permeability and water absorption

Beppu, Marisa Masumi; Vieira, Rodrigo Silveira; Aimoli, Cassiano Gomes; Santana, César Costapinto

doi:10.1016/j.memsci.2007.06.015

Cited by 329 publications

(173 citation statements)

References 23 publications

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“…An average of 80% for chitosan membrane versus 50% for crosslinked PVA/CH membrane could be observed. This result confirms how water absorption is drastically changed by the PVA percentage incorporated, in agreement with that reported by Beppu [24]. The clear zones diameter formed represent PVA/CH hydrogel the inhibition activity tested.…”

Section: Aloe Vera Absorptionsupporting

confidence: 92%

Manufacturing and evaluation of Chitosan, PVA and Aloe Vera hydrogels for skin applications

Sierra

Perea-Mesa

2017

DYNA

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The aim of this research was to develop membranes of polyvinyl alcohol (PVA) and chitosan (CH), capable of absorbing an Aloe Vera solution and gradually releasing to accelerate wound healing. The methodology involved varying the membrane's composition using Chitosan and Polyvinyl Alcohol at 5 and 10% w/v, and implementing different PVA/CH relations of 30/70, 50/50 and 70/30 (v/v) and embed them in a 2% (v/v) Aloe Vera solution to create hydrogels. Once hydrogels were obtained, they were characterized by Infrared Spectroscopy and Scanning Electronic Microscopy, and evaluated by mechanical and absorption tests as well as bactericide activity assays. The crosslinking degree between PVA/CH allowed obtaining a matrix with high absorption capacity and with gradual release of Aloe Vera, with mechanical properties and dimensional stability even after rehydration. Bactericide assays showed chitosan and Aloe Vera protective activity, which indicates this compound may be suitable for applications that help in wound healing.

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Section: Aloe Vera Absorptionsupporting

confidence: 92%

Manufacturing and evaluation of Chitosan, PVA and Aloe Vera hydrogels for skin applications

Sierra

Perea-Mesa

2017

DYNA

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“…The crystalline phase obtained from the YIG powder was identified by comparing the diffractograms from the ICDD database (ICDD/PDF-70-0953), see Figure 3. One can observe in F sample an amorphous phase characteristic to the matrix polymer and this pattern follows those observed in the literature [18][19][20][21][22]. This behavior is present in all composites, see FY 25 and FY 50 ( Figure 3).…”

Section: Resultssupporting

confidence: 87%

Microstructure and magneto-dielectric properties of the chitosan/gelatin-YIG biocomposites

Mallmann¹,

Góes²,

Figueiró³

et al. 2011

Express Polym. Lett.

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Abstract. This work is devoted to the preparation of yttrium iron garnet (YIG) ferrimagnetic biocomposites based in biodegradable chitosan and gelatin. The aim was to produce composite films containing controlled amounts of YIG to obtain a new biological material with magneto-dielectric features. Structural characterization of the biocomposites was made by scanning electron microscopy, X-ray diffraction, infrared absorption spectroscopy and thermal analysis, while the dielectric and magnetic properties were obtained from dielectric spectroscopy and magnetic hysteresis loops, respectively. The versatility of the films obtained makes them possible candidates for use as biomaterials or electronic device.

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“…The other immobilization method (crosslinking-adsorption) required additional preparation of carrier using a bifunctional reagent (glutaraldehyde), which can block amino groups and render polysaccharide structures (alginate or chitosan) more inert and resistant to the acid medium [16].…”

Section: Preparation Of Carriersmentioning

confidence: 99%

Immobilization of Commercial Cellulase and Xylanase by Different Methods Using Two Polymeric Supports

Romo-Sánchez¹,

Camacho²,

Ramírez³

et al. 2014

ABB

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Industrial applications require enzymes highly stable and economically viable in terms of reusability. Enzyme immobilization is an exciting alternative to improve the stability of enzymatic processes. The immobilization of two commercial enzymes is reported here (cellulase and xylanase) using three chemical methods (adsorption, reticulation, and crosslinking-adsorption) and two polymeric supports (alginate-chitin and chitosan-chitin). The optimal pH for binding was 4.5 for cellulase and 5.0 for xylanase, and the optimal enzyme concentrations were 170 µg/mL and 127.5 µg/mL respectively, being the chitosan and the ideal support. In some cases, a low concentration of crosslinking agent (glutaraldehyde) improved stability of the immobilization process. Biotechnological characterization showed that the reusability of enzymes was the most striking finding, particularly of immobilized cellulase using glutaraldehyde, which after 19 cycles retained 64% activity. These results confirm the economic and biotechnical advantages of enzyme immobilization for a range of industrial applications.

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Crosslinking of chitosan membranes using glutaraldehyde: Effect on ion permeability and water absorption

Cited by 329 publications

References 23 publications

Manufacturing and evaluation of Chitosan, PVA and Aloe Vera hydrogels for skin applications

Manufacturing and evaluation of Chitosan, PVA and Aloe Vera hydrogels for skin applications

Microstructure and magneto-dielectric properties of the chitosan/gelatin-YIG biocomposites

Immobilization of Commercial Cellulase and Xylanase by Different Methods Using Two Polymeric Supports

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