Physically crosslinked PVA/graphene-based materials/aloe vera hydrogel with antibacterial activity

Hanif, Wildan; Hardiansyah, Andri; Randy, Ahmad; Asri, Lia Amelia Tresna Wulan

doi:10.1039/d1ra04992e

Cited by 39 publications

(27 citation statements)

References 81 publications

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“…The microstructures of as-prepared PVA/GO hydrogels have not been satisfactorily studied, especially the optimization of open pores in the structure is critical in dye adsorption. Moreover, Hanif et al [26] discussed the antibacterial activity of PVA/GO/ aloe vera (10 % wt. % PVA) hydrogel prepared by the freezethaw method to apply in wound healing.…”

Section: Introductionmentioning

confidence: 99%

An Eco‐Friendly Polyvinyl Alcohol/Graphene Oxide‐Based Hydrogel as a Methylene Blue Adsorbent

2022

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Recently, hydrogels have been introduced for wastewater treatments as eco‐friendly and efficient adsorbents. Polyvinyl alcohol (PVA)‐based hydrogel reinforced with graphene oxide (GO) can be used for methylene blue (MB) removal from water. PVA/GO hydrogels (5 wt. % PVA and 0.5–2 wt. % GO) were prepared via the freeze‐thaw method, and the effect of GO weight percentage, freezing time, and cycle numbers were investigated. Regarding the results, the composite containing 1 wt. % GO, prepared by six‐hour freezing, and five cycles of freeze‐thawing, had the highest compressive strength (1.6±0.1 MPa) among the studied samples. Furthermore, by adding aloe vera to the PVA/GO composite containing 2 wt. % GO, the removal efficiency of MB was increased from 96 % to 99 % after 72 h, although the surface area was decreased from 31.6 m2 g−1 to 3.9 m2 g−1. Adsorption investigations were also highlighted PVA/GO and PVA/GO/aloe vera hydrogel composites follow the pseudo‐second‐order kinetics and Langmuir isotherm models.

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Section: Introductionmentioning

confidence: 99%

An Eco‐Friendly Polyvinyl Alcohol/Graphene Oxide‐Based Hydrogel as a Methylene Blue Adsorbent

2022

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“…An aqueous electrolyte, such as sulphuric acid and potassium hydroxide [17] have higher conductivity than organic electrolytes and lower internal resistance and thus higher pulse power delivery. It is reported that the hydrogel possesses the conductivity of 0.0154 Simens-m-1 and introduction of Aloe vera gel to polyvinyl alcohol (PVA) increases the conductivity of hydrogel [18] with reported value of electrical conductivity of about 0.0063-0.0236 Sm-1at 30OC to 60 degree centigrade [19]. The chemical composition of Aloe vera gel as reported in literature is: Moisture-96.31%, pH-4.…”

Section: Introductionmentioning

confidence: 99%

Synthesized carbon material with semi-organic and aqueous electrolyte for supercapacitor application

Moholkar

Bankar

Karandikar³

2022

IJEECS

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The supercapacitor is an evolving technology that has a potential to play a vital role in the today’s electrical energy storage systems. Supercapacitors are dominated by unique properties that can accompany other energy storage strategies due to its functional characteristics - such as quick charge/discharge ability, higher power density, very long cycle life. It results in to improved system efficiency of hybrid electric energy systems with reduced environmental pollution levels. In this paper, efforts are made to fabricate a low cost prototype of supercapacitor using synthesised carbon material obtained from the pyrolyzed scrap tyre by using both aqueous and Aloe vera gel as semi-aqueous/semi-organic electrolyte. The test results are obtained in the laboratory to ascertain the characteristics of developed supercapacitor in terms of capacitance, internal resistance and peak current. The obtained results are superior as compare to Vulcan XC-72R with trade-off between peak discharge current and other parameters. New carbon material obtained from scrap tyres is cost effective when used along with Aloe vera gel as an electrolyte. Use of scrap tyre carbon as electrode material and Aloe vera gel as naturally available material for electrolyte is an innovation of the presented work.

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“…Hydrogels, for example, are one type of commercial wound dressing that promotes a moist environment. Hydrogels are hydrophilic polymers that help wounds stay moist while absorbing exudate and can be blended with active compounds such as antibacterial agents due to their versatility [10][11][12][13]. They also have a porous structure that holds high water content [14].…”

Section: ■ Introductionmentioning

confidence: 99%

Polyvinyl Alcohol-Cellulose Nanocrystal Hydrogel Containing Anti-inflammatory Agent

et al. 2022

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Hydrogel wound dressings were developed through cross-linking reactions of polyvinyl alcohol (PVA) with glutaraldehyde and by the addition of diclofenac sodium and rutin as anti-inflammatory agents. Cellulose nanocrystals (CNC) were added to improve mechanically and release properties. CNC was isolated from pineapple leaf fibers through the ammonium persulfate method resulting in a mixture of rod-like whisker and spherical morphology. The mechanical properties of hydrogels are increasing with the addition of CNC. Hydrogels containing 8% CNC exhibited 7.266 N/mm2 tensile strength, 156.3% maximum strain, and 700.3 N/mm2 elastic modulus. Drug release tests containing sodium diclofenac were done by taking incubated phosphate buffer saline samples in a pH 7.4 environment and showed that all CNC variations tested are controllable for the first 30 min compared to the sample without CNC. Sodium diclofenac is easily eluted from hydrogel due to its polar properties, and all samples almost demonstrated the same release profile. PVA hydrogels showed fluctuating concentrations of diclofenac compared to others. While hydrogels containing rutin showed a controlled release mode, the addition of CNC in PVA resulted in a slower release of rutin, possibly due to the better binding between CNC and rutin. To conclude, CNC has successfully improved the performance of PVA hydrogels, including the drug release properties.

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Physically crosslinked PVA/graphene-based materials/aloe vera hydrogel with antibacterial activity

Abstract: PVA/GBM/Av hydrogels were synthesized using a freeze-thaw process. It has antibacterial activity against Staphylococcus aureus and cytocompatibility to NIH 3T3 fibroblasts, showing its potential for wound dressing application.

Cited by 39 publications

References 81 publications

An Eco‐Friendly Polyvinyl Alcohol/Graphene Oxide‐Based Hydrogel as a Methylene Blue Adsorbent

An Eco‐Friendly Polyvinyl Alcohol/Graphene Oxide‐Based Hydrogel as a Methylene Blue Adsorbent

Synthesized carbon material with semi-organic and aqueous electrolyte for supercapacitor application

Polyvinyl Alcohol-Cellulose Nanocrystal Hydrogel Containing Anti-inflammatory Agent

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