Water and gas barrier properties of polyvinyl alcohol (PVA)/starch (ST)/ glycerol (GL)/halloysite nanotube (HNT) bionanocomposite films: Experimental characterisation and modelling approach

Abdullah, Zainab Waheed; Dong, Yu; Han, Ning; Liu, Shaomin

doi:10.1016/j.compositesb.2019.107033

Cited by 81 publications

(35 citation statements)

References 49 publications

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“…The presence of unloaded-halloysite nanotubes in the polymer matrices created tortuous paths to reduce the diffusion of permeants in addition to the mobility restriction of polymeric segments. 33 However, silver sulfadiazine-loaded halloysite samples increased the composite permeability because the drug altered the surface load, which probably favored the interaction with water and increased the WVP. The WVTR, across the top surface of the (bio)nanocomposites, determines the moist wound environment, which is crucial to the healing process.…”

Section: Discussionmentioning

confidence: 99%

“…It has broad-spectrum activity against Gram-negative and Gram-positive bacteria, presenting low toxicity to human cells. 33,34 This drug usually needs a twice-daily application covered by a secondary dressing (gauze pad). 30,32 Thus, the conventional formulations have limited use due to the low adhesion and inefficient drug permeability in the skin, mainly for long-term treatment of wounds, which generates low patient compliance.…”

Section: Introductionmentioning

confidence: 99%

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Antimicrobial dressing of silver sulfadiazine-loaded halloysite/cassava starch-based (bio)nanocomposites

et al. 2021

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(Bio)nanocomposites have been studied for biomedical applications, including the treatment of wounds. However, wound infection is one of the main problems of wound care management, and the use of wound dressings with antibacterial agents is essential. This work focused on developing and characterizing silver sulfadiazine-loaded halloysite/cassava starch-based (bio)nanocomposites potentially suitable as antimicrobial dressing. Silver sulfadiazine was complexed inside the halloysite nanotubes lumen, and the drug-loaded nanotubes were incorporated in thermoplastic starch dispersion, forming the (bio)nanocomposites. The silver sulfadiazine-loaded halloysite and the (bio)nanocomposite were characterized by zeta potential, scanning electron microscopy, X-ray diffraction, and infrared spectroscopy. The dressing properties of (bio)nanocomposites (water vapor permeability and mechanical stability) and their antimicrobial efficacy by Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus were also evaluated. Physicochemical studies suggested the silver sulfadiazine-loaded halloysite complexation (zeta potential of −38.9 mV) and its interactions with the starch forming the nanocomposites. The silver sulfadiazine-loaded halloysite/starch-based (bio)nanocomposites possessed a homogeneous and organized structure. Also, they had mechanical properties to be used as a dressing (13.73 ± 3.09 MPa and 3.17 ± 1.28% of elongation at break), and its permeability (6.18 ± 0.43 (10−13) g.Pa−1.s−1.m−1) could be able to maintain the environmental moisture at the wound surface. Besides that, the (bio)nanocomposites acted against the studied bacteria, being a potential contact antimicrobial and biodegradable wound dressing. Finally, the developed (bio)nanocomposites are semi-occlusive and good candidates for dry wounds to be widely in vitro and in vivo tested as controlled silver sulfadiazine delivery dressing.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Antimicrobial dressing of silver sulfadiazine-loaded halloysite/cassava starch-based (bio)nanocomposites

et al. 2021

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“…where k is rate constant can be estimated from the slope of the regression line of the plot of weight differences versus time, and A is the surface area of the sheet [26].…”

Section: Water Vapor Permeation Ratementioning

confidence: 99%

Polyvinyl Alcohol Food Packaging System Comprising Green Synthesized Silver Nanoparticles

et al. 2020

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Green synthesis of silver nanoparticles (AgNPs) using aqueous Moringa extract and their incorporation in polyvinyl alcohol (PVA) as food packaging materials have been performed. The prepared nanoparticles were characterized via Ultraviolet-visible spectra and transmission electron microscope, and the results revealed the formation of silver nanoparticles in a semi-spherical shape with an average size ranged from 2 to 5 nm. The addition of different ratios of the nanoparticles onto the PVA matrix and their crosslinking via citric acid to obtain nanocomposite sheets were performed. The nanocomposite sheets were characterized using FT-IR, UV-Vis, and TGA. In addition, their mechanical properties were evaluated. Water vapor permeability rate and water content were also determined. The composite sheets showed good thermal and optical performance. Antibacterial activities of the prepared nanocomposite sheets were evaluated, and the results exhibited good resistance to bacterial growth.

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“…Numerous studies [35,36] have been carried out on systems containing nano-clays as gas barrier fillers in polymeric matrices whose results showed a direct effect of nano-clay on the permeation of moisture and oxygen. The hydrophobic nature of nano-clay makes its distribution uniform in water-soluble polyvinyl alcohol (PVOH) [37,38]. Gaume et al [25] used sodium montmorillonite (MMT-Na + ) clay as filling particles and reported a reduction in oxygen and moisture permeation by a factor of 2.7 and 1.7, respectively.…”

Section: Introductionmentioning

confidence: 99%

Polyvinyl Alcohol and Nano-Clay Based Solution Processed Packaging Coatings

et al. 2021

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Cost-effective, clean, highly transparent, and flexible as well as a coatable packaging material is envisioned to solve or at least mitigate quality preservation issues of organic materials, originating from moisture interaction under ambient conditions. Liquid phase processing of packaging coatings using nano-clay and polyvinyl alcohol (PVOH) has been developed and reported. Detailed analysis of the developed coating revealed moisture permeability of 2.8 × 10−2 g·cm/m2·day at 40 °C and 85% relative humidity (RH), which is in close accordance with Bharadwaj’s theoretical permeability model. Moreover, the developed coatings are not only more than 90% transparent, when exposed to white light, but also exhibit excellent flexibility and even after going through 10,000 bending cycles maintained the same blocking effect against moisture.

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Water and gas barrier properties of polyvinyl alcohol (PVA)/starch (ST)/ glycerol (GL)/halloysite nanotube (HNT) bionanocomposite films: Experimental characterisation and modelling approach

Cited by 81 publications

References 49 publications

Antimicrobial dressing of silver sulfadiazine-loaded halloysite/cassava starch-based (bio)nanocomposites

Antimicrobial dressing of silver sulfadiazine-loaded halloysite/cassava starch-based (bio)nanocomposites

Polyvinyl Alcohol Food Packaging System Comprising Green Synthesized Silver Nanoparticles

Polyvinyl Alcohol and Nano-Clay Based Solution Processed Packaging Coatings

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