Preparation and characterization of chitosan/poly(vinyl alcohol) chemically crosslinked blends for biomedical applications

Costa-Júnior, Ezequiel S.; Barbosa-Stancioli, Edel Figueiredo; Mansur, Alexandra A.P.; Vasconcelos, Wander L.

doi:10.1016/j.carbpol.2008.11.015

Cited by 451 publications

(210 citation statements)

References 50 publications

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“…In conclusion, the SEM results show that a phase separation occurred in the PVA/FK blended system, which could be suppressed by adding DAS as cross-linking agent. This indicates that the PVA and FK polymer chains are mostly entangled due to hydrogen bonds prior to the chemical cross-linking, but the formation of covalent bonds has occurred due to the DAS-induced cross-linking [35]. …”

Section: Morphology Of the Filmsmentioning

confidence: 99%

Keratin/Polyvinyl Alcohol Blend Films Cross-Linked by Dialdehyde Starch and Their Potential Application for Drug Release

Dou

Zhang

et al. 2015

Polymers

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Feather keratin (FK) extracted from feathers represents a valuable source of biodegradable and biocompatible polymer. The aim of this study was the development and characterization of blended films based on FK and polyvinyl alcohol (PVA) cross-linked by dialdehyde starch (DAS) for a potential drug release application. The compatibility of FK/PVA was improved when cross-linked by DAS: the relative crystallinity of the PVA/FK film slightly decreased, and the enthalpy value for the melting peak decreased by about 50% for the cross-linked films. The total soluble mass of all blend films in water was below 35% at 37 °C, indicating a good stability of the films in water. The results of the Rhodamine B dye (as a model drug) release tests showed that the release rates decreased with increasing DAS content. DAS-induced cross-linking improves several important properties of the FK/PVA films, such as the compactness, the compatibility, and the stability in water. These improvements offer the potential to expand the application of FK films in the biomaterial field. OPEN ACCESSPolymers 2015, 7 581

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Section: Morphology Of the Filmsmentioning

confidence: 99%

Keratin/Polyvinyl Alcohol Blend Films Cross-Linked by Dialdehyde Starch and Their Potential Application for Drug Release

Dou

Zhang

et al. 2015

Polymers

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“…25 The CNC/ZnO-AgNPs were then dispersed in a solution of distilled water (100 mL) and ultrasonicated for 30 minutes. The loading level of the CNC/ZnO-AgNP filler (0, 1, 3, 5, or 7 wt%) was based on the amount of PVA/Cs blend.…”

Section: Preparation Of Bionanocompositesmentioning

confidence: 99%

Preparation and properties of poly(vinyl alcohol)/chitosan blend bionanocomposites reinforced with cellulose nanocrystals/ZnO-Ag multifunctional nanosized filler

Azizi¹,

Ahmad²,

Hussein³

et al. 2014

IJN

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A series of novel bionanocomposites were cast using different contents of zinc oxide-silver nanoparticles (ZnO-AgNPs) stabilized by cellulose nanocrystals (CNC) as multifunctional nanosized fillers in poly(vinyl alcohol)/chitosan (PVA/Cs) matrices. The morphological structure, mechanical properties, ultraviolet-visible absorption, and antimicrobial properties of the prepared films were investigated as a function of their CNC/ZnO-AgNP content and compared with PVA/chitosan/CNC bionanocomposite films. X-ray diffraction and field emission scanning electron microscopic analyses showed that the CNC/ZnO-AgNPs were homogeneously dispersed in the PVA/Cs matrix and the crystallinity increased with increasing nanosized filler content. Compared with pure PVA/Cs, the tensile strength and modulus in the films increased from 0.055 to 0.205 GPa and from 0.395 to 1.20 GPa, respectively. Ultraviolet and visible light can be efficiently absorbed by incorporating ZnO-AgNPs into a PVA/Cs matrix, suggesting that these bionanocomposite films show good visibility and ultraviolet-shielding effects. The bionanocomposite films had excellent antimicrobial properties, killing both Gram-negative Salmonella choleraesuis and Gram-positive Staphylococcus aureus . The enhanced physical properties achieved by incorporating CNC/ZnO-AgNPs could be beneficial in various applications.

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“…C-H vibrational stretching of alkyl groups has been observed between 3000-2840 cm -1 . A broad band at 3600-3200 cm -1 ( Figure 1a) was due to -NH symmetric vibration and -OH stretching of inter and intra-molecular hydrogen bonding [29][30][31][32] . It was also observed that the broad region between 3600-3200 cm -1 was increased in all blended films as compared to the chitosan and PVA.…”

Section: Fourier Transform Infrared Spectroscopic (Ftir) Analysismentioning

confidence: 99%

An Investigation of Ac Impedance and Dielectric Spectroscopic Properties of Conducting Chitosan-silane Crosslinked-poly (Vinyl Alcohol) Blended Films

et al. 2015

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The films of chitosan (CS)-silane crosslinked-poly(vinyl alcohol) (PVA) with different weight % were prepared. The effect on conductivity of CS/PVA blended films due to change in the concentration of PVA and temperature was investigated by impedance spectroscopy and showed good conductance properties. The complex impedance plots revealed single semicircular arcs indicating the bulk contribution to overall electrical behavior of all synthesized samples. The ac conductivity obeyed the Jonscher's power law for all samples in the frequency range of 2 kHz to 2 MHz. The ionic conductivity of the films was increased with the increase in temperature for all synthesized samples which showed an increase in the number of effective charge carriers while it was decreased at a specific higher temperature for each film. The observed activation energy for CP4, CP8 and CP10 were 0.431, 0.610 and 0.425 eV, respectively. These properties showed that the films were promising materials to be employed for conducting properties.

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Preparation and characterization of chitosan/poly(vinyl alcohol) chemically crosslinked blends for biomedical applications

Cited by 451 publications

References 50 publications

Keratin/Polyvinyl Alcohol Blend Films Cross-Linked by Dialdehyde Starch and Their Potential Application for Drug Release

Keratin/Polyvinyl Alcohol Blend Films Cross-Linked by Dialdehyde Starch and Their Potential Application for Drug Release

Preparation and properties of poly(vinyl alcohol)/chitosan blend bionanocomposites reinforced with cellulose nanocrystals/ZnO-Ag multifunctional nanosized filler

An Investigation of Ac Impedance and Dielectric Spectroscopic Properties of Conducting Chitosan-silane Crosslinked-poly (Vinyl Alcohol) Blended Films

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