Thermal degradation kinetics of ethyl vanillin crosslinked chitosan/poly(vinyl alcohol) blend films for food packaging applications

Narasagoudr, Shivayogi S.; Shanbhag, Yogesh; Chougale, Ravindra B.; Baraker, Basavarajeshwari M.; Masti, Saraswati P.; Lobo, Blaise

doi:10.1016/j.cdc.2021.100739

Cited by 10 publications

(5 citation statements)

References 46 publications

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“…In addition, the strong intermolecular forces and close packaging in the crystalline structure require more energy to break the bonds and transition the polymer from a solid to a liquid. 57 F I G U R E 1 Thermal degradation process proposed for molten PVA, (A) keto-enol tautomerization, (B) hydrogen transfer leading to depropagation, and (C) hydrogen transfer leading to alkyne end-group. 50 Conversely, amorphous regions in polymer chains are disordered and lack a regular arrangement.…”

Section: Mechanism Of Thermal Degradationmentioning

confidence: 99%

“…Physical entanglement provides mechanical reinforcement to the blend and can affect thermal stability by hindering the movement and degradation of the polymer chains. 57,73,74 Generally, the thermal stability of PVA/CS blended film can not significantly improve when a small amount of CS is added compared to the neat PVA. The limited enhancement in thermal stability with low-concentration CS can be attributed to the weak intermolecular interactions between these two polymers.…”

Section: Pva/chitosan Blendsmentioning

confidence: 99%

“…The polymer chains are packed closely together in a repetitive pattern, forming crystalline domains. In addition, the strong intermolecular forces and close packaging in the crystalline structure require more energy to break the bonds and transition the polymer from a solid to a liquid 57 . Conversely, amorphous regions in polymer chains are disordered and lack a regular arrangement.…”

Section: Mechanism Of Thermal Degradationmentioning

confidence: 99%

“…Physical entanglement occurs due to the overlapping and intermingling of polymer chains, resulting in interlocking networks. Physical entanglement provides mechanical reinforcement to the blend and can affect thermal stability by hindering the movement and degradation of the polymer chains 57,73,74 …”

Section: Strategies For Improving the Thermal Stability Of Pvamentioning

confidence: 99%

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Recent advances and challenges in thermal stability of PVA‐based film: A review

Suleiman,

Zeng,

Chakma

et al. 2024

Polymers for Advanced Techs

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Food packaging film is being developed using biodegradable polymers to prolong the shelf life of foods and address the environmental damage caused by non‐biodegradable plastics. Poly(vinyl alcohol) (PVA) is a biodegradable polymer with outstanding characteristics and can be easily shaped into a film. However, PVA‐based film still faces several obstacles that seriously restrict its practical application in the food packaging industry, particularly its low thermal stability limits the film process method. The growing preference demand for PVA‐based films with enhanced thermal stability in food packaging can be attributed to their advantageous characteristics, including commendable temperature resistance, safety, versatile processing capabilities, and prolonged shelf life. It is critical to comprehend the difficulties with PVA thermal degradation behavior and mechanism, and how to address this problem. In this review, we provide strategies for improving the thermal stability of PVA film including modification with environmentally friendly polymers, nanoparticles, and crosslinking agents. Also, the current challenges, and the potential for future advancements in the thermal stability of PVA and its composites are proposed. The new insight into the relationship between PVA based film processing and thermal properties of materials are expected to provide a valuable guide for developing PVA films with high thermal stability.

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Section: Mechanism Of Thermal Degradationmentioning

confidence: 99%

Section: Pva/chitosan Blendsmentioning

confidence: 99%

Section: Mechanism Of Thermal Degradationmentioning

confidence: 99%

Section: Strategies For Improving the Thermal Stability Of Pvamentioning

confidence: 99%

See 2 more Smart Citations

Recent advances and challenges in thermal stability of PVA‐based film: A review

Suleiman,

Zeng,

Chakma

et al. 2024

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…Narasagoudr et al [ 194 ] obtained films based on chitosan and polyvinyl alcohol, in which a 2% solution of ethyl vanillin in ethyl alcohol served as a cross-linking agent. For the obtained materials, a kinetic analysis was performed which determined that the average activation energy for the degradation of the cross-linked film increased to 155–213 kJ·mol −1 compared to the material without the cross-linking agent.…”

Section: Cross-linking Agents From Synthetic and Natural Sourcesmentioning

confidence: 99%

Are Natural Compounds a Promising Alternative to Synthetic Cross-Linking Agents in the Preparation of Hydrogels?

2023

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The main aim of this review is to assess the potential use of natural cross-linking agents, such as genipin, citric acid, tannic acid, epigallocatechin gallate, and vanillin in preparing chemically cross-linked hydrogels for the biomedical, pharmaceutical, and cosmetic industries. Chemical cross-linking is one of the most important methods that is commonly used to form mechanically strong hydrogels based on biopolymers, such as alginates, chitosan, hyaluronic acid, collagen, gelatin, and fibroin. Moreover, the properties of natural cross-linking agents and their advantages and disadvantages are compared relative to their commonly known synthetic cross-linking counterparts. Nowadays, advanced technologies can facilitate the acquisition of high-purity biomaterials from unreacted components with no additional purification steps. However, while planning and designing a chemical process, energy and water consumption should be limited in order to reduce the risks associated with global warming. However, many synthetic cross-linking agents, such as N,N’-methylenebisacrylamide, ethylene glycol dimethacrylate, poly (ethylene glycol) diacrylates, epichlorohydrin, and glutaraldehyde, are harmful to both humans and the environment. One solution to this problem could be the use of bio-cross-linking agents obtained from natural resources, which would eliminate their toxic effects and ensure the safety for humans and the environment.

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Development of histamine reinforced poly(vinyl alcohol)/chitosan blended films for potential biomedical applications

Serbezeanu¹,

Bercea

Butnaru

et al. 2021

J of Applied Polymer Sci

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Poly(vinyl alcohol) (PVA)/chitosan (CS) blends represent one of the most studied bicomponent systems constituted between a natural biomacromolecule and an easily biodegradable synthetic polymer. Yet, in order to control and improve the physical, hydrolytic, and mechanical stability of these systems, by adding safe linkers to bind the free hydrophilic groups, there is much work to be done. In the present work, histamine (H) reinforced PVA/CS tri‐components blended films have been developed via casting from solution technique. Before casting, rheology measurements were conducted on the studied solutions, then, all the PVA/CS/H matrices were subjected to FTIR studies, scanning electron microscopy, contact angle, water absorption capacity, surface roughness measurements, antimicrobial, and in‐vitro biocompatibility studies. Results of the morphological studies showed that pores were uniformly dispersed on the matrix while the surface roughness increased in the films when a higher ratio of histamine was used. The studies revealed significant enhancement in the water absorption capacity of the histamine reinforced blends compared with the pristine PVA/CS film. Cellular behavior studies performed on epithelial (MCF line 7) cells revealed comparable proliferative and adhesion activity of tri‐component PVA/CS/H films compared to that of pristine PVA/CS films.

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Thermal degradation kinetics of ethyl vanillin crosslinked chitosan/poly(vinyl alcohol) blend films for food packaging applications

Cited by 10 publications

References 46 publications

Recent advances and challenges in thermal stability of PVA‐based film: A review

Recent advances and challenges in thermal stability of PVA‐based film: A review

Are Natural Compounds a Promising Alternative to Synthetic Cross-Linking Agents in the Preparation of Hydrogels?

Development of histamine reinforced poly(vinyl alcohol)/chitosan blended films for potential biomedical applications

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