Preparation and characterization of novel chitosan/gelatin membranes using chitosan hydrogel

Nagahama, Hideaki; Maeda, Hideaki; Kashiki, T.; Jayakumar, R.; Furuike, Tetsuya; Tamura, Hiroshi

doi:10.1016/j.carbpol.2008.10.015

Cited by 224 publications

(88 citation statements)

References 23 publications

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“…Before imbibing them in a 2% Aloe Vera solution (above), the texture of PVA/CH membranes is highly uniform and homogeneous, very similar in appearance, a fact that demonstrates the high reproducibility of the process. Apparent roughness or porous structures cannot be noticed, in accordance with the structure of the samples reported by Nagahama [14]. Fig.…”

Section: Characterization Of Pva/ch Membranes and Patternsupporting

confidence: 88%

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: Characterization Of Pva/ch Membranes and Patternsupporting

confidence: 88%

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

Sierra

Perea-Mesa

2017

DYNA

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“…The patterns of electrospun gelatin are not crystalline and appear amorphous (not shown).The XRD pattern of electrospun gelatin fiber mats was shown in Figure 3. A broad hallow can be seen around (2θ = 22˚) in the XRD pattern, which is attributed to the diffraction peak of gelatin [27]. The above results indicate the decrease in crystallinity of silver nanoparticles.…”

Section: X-ray Diffraction Analysis (Xrd)mentioning

confidence: 65%

Electrospinning of Gelatin Functionalized with Silver Na-noparticles for Nanofiber Fabrication

Oraby¹,

Waley²,

El‐Dewany³

et al. 2013

MNSMS

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The present paper deals with gelatin nanofibres functionalized with silver nanoparticles, prepared by electrospinning using solutions of gelatin mixed with silver nitrate (AgNO 3 ). As a common solvent for gelatin and silver nitrate (AgNO 3 ), a mixture of acetic acid and water (70:30 v/v) was selected. In this system, acetic acid was used as a solvent for gelatin, and at the same time reducing agent for silver ions in solution. Silver nanoparticles (nAg) were stabilized through a mechanism that involves an interaction of the oxygen atoms of the carbonyl groups of gelatin. The viscosity and the conductivity of the gelatinous solutions were found to increase with the solution concentration. There is an observed decrease in the viscosity of the nAg containing gelatin solutions with the aging time increasing, whereas the conductivity of the AgNO 3 -containing gelatin solutions was greater than that of the base gelatin solution. The gelatin nanofibres functionalized with silver nanoparticles were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and antimicrobial test. The results of investigations by TEM and XRD confirmed the presence of silver nanoparticles with diameters in the range of (2 -10 nm), uniformly distributed over the surface of smooth nanofibres with an average diameter of 70 nm. The release of silver ions from both the 2-and 4-hrs crosslinked nAg containing gelatin fiber mats by a total immersion method in buffer and distilled water occurred rapidly during the first 60 minutes, and increased gradually afterwards. Lastly, the tests demonstrated that gelatin/Ag nanofibers have a good antimicrobial activity against some common bacteria found on burned wounds. The antibacterial activity of these materials was greatest against Staphylococcus aureus, followed by Escherichia coli, and Pseudomonas aeroginosa ≈ Candida albicans.

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“…The SEM images of the ONK, poly(NONK82) and poly(NONK91) surfaces are presented in Figure 7 at varying 1000× and 10,000× magnifications. According to Nagahama et al (2009), the surface morphology of a chitosan membrane is smooth with no large pores on the surface. This smooth morphology is due to the presence of chitosan hydrogels in the membrane.…”

Section: Resultsmentioning

confidence: 99%

Modification of Chitosan for Preparation of Poly(N-isopropylacrylamide/ O-nitrochitosan Interpenetrating Polymer Network

Rahman¹,

Hanifah²,

Zani³

et al. 2015

JSM

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An interpenetrating polymer network (IPN), N-isopropylacrylamide/O-nitrochitosan (NONK) was developed in the presence Keywords: N-isopropylacrylamide(NIPAAm); nuclear magnetic resonance(NMR); O-nitrochitosan (ONK) ABSTRAK Polimer rangkaian saling menembus (IPN) N-isopropilakrilamida/O-nitrokitosan (NONK) telah dibangunkan dengan kehadiran amonium persulfat dengan menggunakan teknik pempolimeran larutan. O-nitrokitosan disintesis daripada kitosan terlebih dahulu sebelum ditindak balaskan dengan N-isopropilakrilamida. Satu getaran baru ikatan C-N terbentuk

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Preparation and characterization of novel chitosan/gelatin membranes using chitosan hydrogel

Cited by 224 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

Electrospinning of Gelatin Functionalized with Silver Na-noparticles for Nanofiber Fabrication

Modification of Chitosan for Preparation of Poly(N-isopropylacrylamide/ O-nitrochitosan Interpenetrating Polymer Network

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