Physicochemical and bioactivity of cross-linked chitosan–PVA film for food packaging applications

Tripathi, Sarsij; Mehrotra, Gopal K.; Dutta, Pradip Kumar

doi:10.1016/j.ijbiomac.2009.07.006

Cited by 419 publications

(194 citation statements)

References 13 publications

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“…CH shows even distributions in PVA/CH-2, and PVA/CH-2.5 films, demonstrating the high compatibility of the two polymers and a compact structure lacking phase separation [14]. No air bubbles, pores, cracks, or droplets are observed, further confirming the high compatibility of the two polymers, similar to that observed by Tripathi et al [15]. However, when the CH content is increased, it appears visibly as rough areas.…”

Section: Sem Analysissupporting

confidence: 82%

“…These structural properties of the dried CH matrices may offer a larger surface area, and therefore, better matrix-solvent interactions, allowing for faster solvent uptake. This leads to dissociation, with the most obvious result of scaly structures [15]. Figure 2 presents the characteristic attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectra corresponding to CH, PVA, and PVA/CH-2.5.…”

Section: Sem Analysismentioning

confidence: 99%

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Fabrication and Testing of PVA/Chitosan Bilayer Films for Strawberry Packaging

et al. 2017

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Strawberry packaging based on four different chitosan-poly(vinylalcohol) blend films with chitosan contents of 0 wt %, 20 wt %, 25 wt %, and 30 wt % was tested. The samples were stored at 18 ± 2 • C and 60% ± 5% relative humidity for six days. Strawberry quality was evaluated during and after storage. Strawberries packaged using these films showed significant differences in weight loss and firmness, decay percentage, titratable acidity, total soluble solids, and ascorbic acid content when compared to non-packaged strawberries. The 25 wt % bilayer film showed the best performance in terms of delaying changes in strawberries. The findings suggest that these 25 wt % chitosan films can used to extend strawberry shelf lives while maintaining quality levels.

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Section: Sem Analysissupporting

confidence: 82%

Section: Sem Analysismentioning

confidence: 99%

Fabrication and Testing of PVA/Chitosan Bilayer Films for Strawberry Packaging

et al. 2017

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“…The endothermic peak in CS thermogram might be related to the glass transition temperature (Tg) of Cs and the exothermic peak at 325°C was probably due to degradation of the polymer (22)(23)(24). Thermograms of nanoparticle formulations were the same and showed only a broad endothermic peak around 140 -170°C.…”

Section: Discussionmentioning

confidence: 99%

Preparation and In Vitro Evaluation of Chitosan Nanoparticles Containing Diclofenac Using the Ion-Gelation Method

Kouchak

Azarpanah

2015

Jundishapur J Nat Pharm Prod

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Background: Chitosan-based nanoparticle systems have gained wide interest, mainly for their biocompatibility, biodegradability and mucoadhesive properties. Objectives: The aim of this study was to prepare and evaluate diclofenac-loaded chitosan nanoparticles based on the ionotropic gelation method. Materials and Methods: Chitosan (CS) nanoparticles containing diclofenac was prepared using the ionotropic gelation method. Sodium tripolyphosphate (TPP) was used as a polyanion in this process. The effect of some parameters on particle size and drug loading efficiency was evaluated. Results: Transmission electron microscopy (TEM) photographs exhibited typical spherical shape of particles. The mean particle size was within 129 -166 nm and was affected by homogenization, CS/TPP ratio, CS/drug ratio and pH of medium. The maximum drug loading efficiency was estimated as 65.43 ± 7.03% with CS/drug ratio of 10:1. This value tended to decrease by enhancement of drug proportion in the formulations. Differential scanning calorimetry data confirmed the formation of polyelectrolyte complex of TPP and chitosan. Drug release profile in phosphate buffer solutions (pH 6.8, 7.4) showed initial burst effect followed by a slower release pattern. However, release of diclofenac in the acidic medium was negligible. Conclusions: Diclofenac-loaded nanoparticles based on properties of chitosan gelation could delay the release of drugs in the stomach and be further evaluated for the enteric delivery of diclofenac.

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“…For CD‐1@PVA, phosphorescence appears after annealing at 200 °C, while for CD‐2@PVA, already at 150 °C ( Figure 3 a). Thermal treatment of CD@PVA composites leads to the dehydration, which occurs between hydroxyl groups in PVA and hydroxyl or carboxyl groups on the surface of CDs 44, 45. As a result, CDs become chemically bonded in the cross‐linked PVA chains, which results in suppressing of vibrations/rotations of the CDs' surface groups.…”

mentioning

confidence: 99%

Multilevel Data Encryption Using Thermal‐Treatment Controlled Room Temperature Phosphorescence of Carbon Dot/Polyvinylalcohol Composites

et al. 2018

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Thermal‐treatment controlled room temperature phosphorescence is realized by embedding either originally synthesized carbon dots (CDs) or 200 °C thermal‐treated CDs into a polyvinylalcohol (PVA) matrix through post‐synthetic thermal annealing at 200 or 150 °C. The thermal‐treatment controlled phosphorescence is attributed to the transfer of photoexcitation from the excited singlet state to the triplet state through intersystem crossing, followed by radiative transition to the ground state, which is due to decrease of quenchers (oxygen) in the CDs and suppression of the vibrational dissipations through the chemical bonding of CDs in the PVA matrix. Multilevel fluorescence/phosphorescence data encryption is demonstrated based on the thermal‐treatment controlled phosphorescence from CD@PVA composites.

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Physicochemical and bioactivity of cross-linked chitosan–PVA film for food packaging applications

Cited by 419 publications

References 13 publications

Fabrication and Testing of PVA/Chitosan Bilayer Films for Strawberry Packaging

Fabrication and Testing of PVA/Chitosan Bilayer Films for Strawberry Packaging

Preparation and In Vitro Evaluation of Chitosan Nanoparticles Containing Diclofenac Using the Ion-Gelation Method

Multilevel Data Encryption Using Thermal‐Treatment Controlled Room Temperature Phosphorescence of Carbon Dot/Polyvinylalcohol Composites

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