A composite polyvinyl alcohol–medicinal plant extract crosslinked hydrogel: a novel soft system with excellent rhodamine B adsorption and significant antifungal activity

Tak, Umar Nabi; Rashid, Showkat; Ahangar, Firdaus Ahmad; Kour, Pawandeep; Shaheen, Arjumund; Sidiq, Saima; Gousia,; Manhas, Ayaz Ahmad; Nazir, Nighat; Dar, Aijaz Ahmad

doi:10.1039/d3nj02229c

Cited by 7 publications

(1 citation statement)

References 55 publications

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“…G ′ and G ″ values were found to remain constant throughout the frequency range for all hydrogel beads except Chi/Gel-AHM and Chi/Gel-PWA where G ′ starts increasing with an increase in the angular frequency. The observed behavior is characteristic of physical hydrogels, where the G ′ and G ″ values exhibit strong frequency dependence, at the highest frequencies . Additionally, the absence of a crossover point between G ′ and G ″ indicates that the hydrogels had entangled fibrous networks.…”

Section: Resultsmentioning

confidence: 99%

Multifunctional Chitosan–Polyoxometalate-Based Hydrogel Beads for UV Light Detection, Inkless Erasable Printing, Heterogenous Catalysis, and Antibacterial Applications

Shaheen,

Kour,

Tak

et al. 2024

ACS Appl. Eng. Mater.

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In the present study, we report the synthesis of two different Kegging-type polyoxometalates (POMs), ammonium heptamolybdate (AHM) and phosphotungstic acid (PWA), loaded hydrogel beads formed from chitosan (Chi), chitosan/methylcellulose (Chi/MC) and chitosan/ gelatin (Chi/Gel). The addition of negatively charged POMs results in cross-linking between positively charged chitosan chains through electrostatic attraction. Fourier transform infrared spectroscopy, scanning electron microscopy, and thermal gravimetric analysis were used to characterize the as-prepared hydrogel beads. Rheological measurements provided the mechanical and self-healing properties. Swelling properties of the as-prepared hydrogels were determined at pH 6.8, showing a maximum swellabilty of around 4000% in the case of chitosan/gelatin-PWA composite hydrogel. The hydrogels showed low cytotoxicity on HeLa cancer cells but became significant at higher dose levels. The embedded POMs within the biopolymer hydrogel beads had a significant enhancement of their antibacterial action against Gram-negative bacteria Escherichia coli and Gram-positive bacteria Staphylococcus aureus. The hydrogel beads containing AHM showed reversible photochromic properties with rapid UV detection and inkless erasable printing properties. The hydrogel beads had a significant catalytic effect on the reaction of o-phenylenediamine and aldehydes employing hydrogen peroxide as an oxidant under ultrasound irradiation at room temperature. These results show that the POM-hydrogel (as-prepared) beads had significant potential as functional soft materials in different application areas like catalysis, photochromism, UV sensing, and the development of antibacterial soft systems.

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Section: Resultsmentioning

confidence: 99%

Multifunctional Chitosan–Polyoxometalate-Based Hydrogel Beads for UV Light Detection, Inkless Erasable Printing, Heterogenous Catalysis, and Antibacterial Applications

Shaheen,

Kour,

Tak

et al. 2024

ACS Appl. Eng. Mater.

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One-step carbonization/activation synthesis of chitosan-based porous sheet-like carbon and studies of adsorptive removal for Rhodamine B

Wu,

Qi,

Zhang

et al. 2024

Carbohydrate Polymers

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Effect of in situ mixed micellization of ester-functionalized gemini surfactant at different pHs on solubilization and cosolubilization of various polycyclic aromatic hydrocarbons of varying hydrophobicities

Rashid,

Tak,

Lone

et al. 2023

Environmental Pollution

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A composite polyvinyl alcohol–medicinal plant extract crosslinked hydrogel: a novel soft system with excellent rhodamine B adsorption and significant antifungal activity

Abstract: Rhodamine B (RhB), a xanthene dye has been tagged as a notorious environmental pollutant because it is very harmful to humans as well as to aquatic life, and needs to...

Cited by 7 publications

References 55 publications

Multifunctional Chitosan–Polyoxometalate-Based Hydrogel Beads for UV Light Detection, Inkless Erasable Printing, Heterogenous Catalysis, and Antibacterial Applications

Multifunctional Chitosan–Polyoxometalate-Based Hydrogel Beads for UV Light Detection, Inkless Erasable Printing, Heterogenous Catalysis, and Antibacterial Applications

One-step carbonization/activation synthesis of chitosan-based porous sheet-like carbon and studies of adsorptive removal for Rhodamine B

Effect of in situ mixed micellization of ester-functionalized gemini surfactant at different pHs on solubilization and cosolubilization of various polycyclic aromatic hydrocarbons of varying hydrophobicities

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