Enhancing structural properties and antioxidant activity of kefiran films by chitosan addition

Sabaghi, Moslem; Maghsoudlou, Yahya; Habibi, Parisa

doi:10.1016/j.foostr.2015.06.003

Cited by 49 publications

(22 citation statements)

References 35 publications

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“…The absorbance of the films was recorded at 600 nm and the empty cell was used as a reference. [5] ODs of the films were calculated by Equation 10. All measurements were performed in triplicates.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Several methods have been investigated to overcome such challenges, one of which develops a mixture of biopolymers (starch, whey protein, and chitosan) and synthetic polymers. [4,5] Polyurethane (PU)-as a unique synthetic polymer-possesses a wide range of physical and chemical properties from a high-performance elastomer to a tough thermoplastic polymer. [6] The reaction of a diisocyanate, either aliphatic or aromatic, with a polyol (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Miscibility and morphology of kefiran/waterborne polyurethane blend films

Rad

Sharifan

Asadi

2017

International Journal of Food Properties

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Biodegradable blends of kefiran with various contents (10-40 wt%) of waterborne polyurethane were successfully synthesized via the casting method. When waterborne polyurethane content is lower than 30 wt%, good compatibility and miscibility were observed; otherwise, phase separation occurs between them. These phenomena can be attributed to intermolecular interactions, which were confirmed by Fourier transform infrared, X-ray diffraction, differential scanning calorimetry analysis, and scanning electron microscopy. Compared with kefiran film, the blends increased in thickness, tensile strength, elongation at break, yellowness, and opacity when the waterborne polyurethane content was increased. Meanwhile, the water vapor permeability and moisture absorption significantly decreased (p < 0.05).

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Section: Mechanical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Miscibility and morphology of kefiran/waterborne polyurethane blend films

Rad

Sharifan

Asadi

2017

International Journal of Food Properties

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“…The composites based on PVA and cellulose is likely to produce materials with excellent mechanical properties since both materials are polar polymer with high compatibility reactions, this is because most of the hydroxyl groups in cellulose molecules have already formed either intra-or inter-molecular hydrogen bonds within each other. Therefore, the micro-cellulose is commonly used in their primary application as excipient for solid dosage forms in pharmaceutical production, due to their carrying capacity and compressibility [15,16] Thermal properties of microcrystallines cellouse and PVA/MCC composites…”

Section: Mechanical Properties Of Microcrystallines Cellouse and Pva/mentioning

confidence: 99%

“…In table 2 shows that barrier properties(oxygen transmission rate OTR, water transmission rate WVTR) of pure PVA is high value due to PVA is hydrophilic and very sensitive to moisture which adversely affects its oxygen transmission rate, that mean(lower contact angle) with increasing degree of hydrolysis because the higher number of polar groups (hydroxyl groups) at a higher degree of hydrolysis and the subsequent greater interaction between polar groups on the surface and the water droplet [15,18]. The hydrophilic PVA is sensitive to moisture and thus its barrier properties are strongly affected by the surrounding relative humidity (RH).…”

Section: Barrier Properties Of Microcrystallines Cellouse and Pva/mccmentioning

confidence: 99%

Barrier, Mechanical and Thermal of Polyvinyl Alchol/Microcrystalline Cellouse Composites in Packaging Application

Ali¹

2017

AJPA

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Abstract:In this study Polyvinyl alcohol (PVA) and (3, 5, 10%)wt microcrystalline cellulose (MCC) were prepared using a solution-casting method. The films that were produced characterized with Fourier Transform Infrared Spectrometry, Differential Scanning Calorimetric, Tensile test, and Barrier properties. The results from FTIR shows that PVA and MCC were considered miscible and compatible owing to hydrogen bonding interaction. Results for Thermal analyses increased in the glass transition temperature (T g ) thermal stability of polyvinyl alchol. Tensile strength of the films were increased with the increased loading of MCC to a composites films. Water vapor permeability of the MCC composites was increased with increasing with content of MCC in the films but oxygen transmission rate was decreased.

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“…Kefiran is a water-soluble and branched gluconolactone that is capable of forming an extremely thin film [20] with low opacity and weak mechanical properties; therefore, it needs some modifications for different applications. In order to improve the performance of kefiran, the blending of two or more polymers has been recently suggested [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Kefiran/poly(vinyl alcohol)/poly(vinyl pyrrolidone) composite nanofibers: fabrication, characterization and consideration of effective parameters in electrospinning

et al. 2020

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The kefiran/polyvinyl alcohol and polyvinyl pyrrolidone nanofibers were effectively fabricated for the first time using electrospinning of poly(vinyl alcohol), poly(vinyl pyrrolidone) and kefiran blend solution. The effect of solution parameters, such as kefiran concentration and poly(vinyl alcohol)/poly(vinyl pyrrolidone) mixing ratio, were considered. The parameters' effects, such as voltage, nozzle-to-collector distance and feeding rate on nanofibers morphology, were also checked by the scanning electron microscopy images. After changing the parameters on different steps, designed by the chemo metrics software, the finest nanofibers were produced in the following conditions: 2% kefiran concentration, 30/70 kefiran/polymer mixing ratio, 12 kV voltage, 200 mm needle-to-collector distance and 0.5 (mL/h) polymer injection rate. The nanofibers produced in these conditions were uniform without knots or adhesion in the lowest diameter of 156 nm. Kefiran concentration and kefiran/polymer mixing ratio were found as the most effective parameter in the morphology and diameter size of the nanofibers. The attenuated total reflectance (ATR-Ft-IR), atomic force spectroscopy, differential scanning calorimeters and thermal gravimetric analysis were used to investigate molecular structures, threedimensional morphology and heating properties of the nanofibers, respectively.

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Enhancing structural properties and antioxidant activity of kefiran films by chitosan addition

Cited by 49 publications

References 35 publications

Miscibility and morphology of kefiran/waterborne polyurethane blend films

Miscibility and morphology of kefiran/waterborne polyurethane blend films

Barrier, Mechanical and Thermal of Polyvinyl Alchol/Microcrystalline Cellouse Composites in Packaging Application

Kefiran/poly(vinyl alcohol)/poly(vinyl pyrrolidone) composite nanofibers: fabrication, characterization and consideration of effective parameters in electrospinning

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