Influence of the glycerol concentration on some physical properties of feather keratin films

Moore, Geovana Rocha Plácido; Martelli, Sílvia Maria; Gandolfo, Cristhiane; Sobral, Paulo José do Amaral; Laurindo, João Borges

doi:10.1016/j.foodhyd.2005.11.001

Cited by 122 publications

(44 citation statements)

References 22 publications

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“…Over the last 20 years, an increased number of research publications focused on biomaterials obtained from renewable resources such as proteins, polysaccharides, and lipids [1,2]. Most materials of biological origin degrade into water, carbon dioxide, and inorganic compounds, and are considered to be environmentally friendly [3].…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…Figure 1 shows the SEM images of KFs before (Figure 1b,c) and after thermal annealing (Figure 1e,f). [35] The surface morphology and in particular the homogeneity and relatively low roughness (RMS: ≈10 nm) of as cast KF was also confirmed by atomic force microscopy (AFM) analysis ( Figure S3a, Supporting Information). This kind of morphology was also observed for chicken feather keratin films always containing glycerol as plasticizer.…”

Section: Morphology Of Keratin Filmsmentioning

confidence: 66%

Keratin Film as Natural and Eco‐Friendly Support for Organic Optoelectronic Devices

Posati

Aluigi

Donnadio

et al. 2019

Advanced Sustainable Systems

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This work describes the preparation of a novel substrate based on keratin extracted from wool and its application as potential support for solution‐processed organic solar cells. Optically transparent, free‐standing, and resistant keratin films are successfully prepared, starting from water solution, and characterized in terms of morphology, structure, thermal and mechanical properties. The effect of solvents and thermal annealing is also investigated in order to mimic and evaluate the impact of the processing conditions used for devices fabrication. Thermally annealed keratin films exhibit enhanced optical transparency (>87%) in the visible region of the spectrum, a transition from α‐helix to β‐sheet and turn structures, improved thermal stability and Young's modulus. The good transparency, flatness, and resistance of as‐cast substrates allow the successful preparation of organic solar cells. Photovoltaic performances similar to those reported for other natural/biobased supports are achieved, confirming the potential of keratin film as an alternative and promising support material for eco‐friendly, fully printable, sustainable, and inexpensive optoelectronic devices.

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“…Modication of peanut proteins by glycosylation or cross-linking with saccharides is a potential way to improve the mechanical strength and the barrier properties of the lms by reinforcing the intermolecular bonds. [6][7][8] In literature, several recent papers deal with the improvement of the mechanical and barrier properties of protein-based lms by glycosylation reactions. 4,9,10 Glycosylation with gum arabic 11 or glucomannan 9 increases the tensile strength, decreases the water vapor permeability of protein lms, but decreases the elongation ability.…”

Section: -4mentioning

confidence: 99%

Effect of xylose on the structural and physicochemical properties of peanut isolated protein based films

et al. 2017

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Films based on xylose and peanut protein isolate (PPI) were prepared by solution casting. The effects of xylose content (1%, 2%, 5%, 10%, 20% PPI, w/w) on the structure and mechanical properties of PPIxylose (PPI-X) film were systematically investigated. The xylose-modified PPI was firstly prepared by crosslinking and modifying of peanut isolated protein with xylose. The degree of glycosylation and surface hydrophobicity significantly increased from 5.6% to 10.9% and from 130.6 to 370.0, respectively, with the increase of the xylose content. Maillard reactions occurring between PPI and xylose were confirmed by Fourier transform infrared spectroscopy. Then the xylose-modified PPI was developed into films. PPI-X films showed markedly increased tensile strength (increased by 77%) and elongation (increased by 67%) and decreased solubility (from 96.6% to 43.4%) compared to PPI films, suggesting that the incorporation of xylose could markedly enhance the mechanical properties and the water resistance of films. This property improvement was correlated to the increased protein surface hydrophobicity and sulfhydryl group content with the addition of xylose. No significant differences were detected among L*, a*, b* colour values of all films (P > 0.05). The scanning electron microscope images of the PPI-X film showed that the addition of xylose up to 10% produced a more homogeneous and denser structure. Finally, the improvement mechanism of the PPI-X film was proposed.

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Influence of the glycerol concentration on some physical properties of feather keratin films

Cited by 122 publications

References 22 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

Keratin Film as Natural and Eco‐Friendly Support for Organic Optoelectronic Devices

Effect of xylose on the structural and physicochemical properties of peanut isolated protein based films

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