Cellulose acetate-based composites with antimicrobial properties from embedded molybdenum trioxide particles

Shafaei, Shahram; Dörrstein, Jörg; Guggenbichler, J. P.; Zollfrank, Cordt

doi:10.1111/lam.12670

Cited by 15 publications

(7 citation statements)

References 46 publications

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“… 38 Upon the introduction of silver nanoparticles into the composite, as shown in Figure 6 b, the T g shifts toward 500 °C. This shift in T g toward a higher temperature range is attributed to increased lateral forces within the bulk state, which might be due to the restricted steric effect 53 (TGA analysis of 10% PAN is shown in Figure S4 ).…”

Section: Resultsmentioning

confidence: 99%

Antibacterial Activity of Molybdenum Oxide–Polyacrylonitrile Composite Membrane with Fast Silver Ion Reduction

Farooq,

Bilal,

Gohar

et al. 2023

ACS Omega

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The development of hybrid composite antibacterial agents for wound dressing has garnered significant attention due to their remarkable antibacterial efficacy and their potential to mitigate microbial resistance. In this study, we present an approach to designing and fabricating wound dressing membranes, utilizing molybdenum oxide–polyacrylonitrile (MoO 3 /PAN) hybrid composites through electrospinning. Subsequently, we enhanced the membrane’s effectiveness by introducing silver (Ag@MoO 3 /PAN) into the matrix via a rapid (within one min) green synthesis method under UV irradiation. Initially, we discuss the morphological characteristics and structural attributes of the resulting membranes. Subsequent investigations explore the antibacterial mechanisms of both MoO 3 and Ag + , revealing that the incorporation of silver substantially enhanced antibacterial activity. Additionally, we elucidate the surface properties, noting that the introduction of silver increases the surface area of the composite membrane by 25.89% compared with the pristine MoO 3 /PAN membrane. Furthermore, we observe a 9% reduction in the water contact angle (WCA) for the Ag@MoO 3 /PAN membrane, indicating improved hydrophilicity. Finally, we analyze the release behavior of the Ag@MoO 3 /PAN membrane. Our findings demonstrate an initial burst release within the first 7 h, followed by a controlled and sustained release pattern over a period of 7 days.

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Section: Resultsmentioning

confidence: 99%

Antibacterial Activity of Molybdenum Oxide–Polyacrylonitrile Composite Membrane with Fast Silver Ion Reduction

Farooq,

Bilal,

Gohar

et al. 2023

ACS Omega

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“…The incorporation of MoO 3 into polymeric binder allows the application of such polymer as a coating on various solid substrates, with controlled release rates and long-term use. Shafaei and co-authors 15 reported the effect of different MoO 3 crystal structures of micrometer size embedded in different polymer composites on antimicrobial activity against the bacteria S. aureus , E. coli and P. aeruginosa . The authors concluded that direct contact between the bacteria and MoO 3 is needed that the H 3 O + ions can diffuse through the bacterial membrane.…”

Section: Introductionmentioning

confidence: 99%

Application and characterization of a novel PVDF-HFP/PVP polymer composite with MoO3 nanowires as a protective coating for wood

Žigon

Centa

Remškar

et al. 2023

Sci Rep

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The coatings on wood must sometimes give aesthetic and basic protection to wooden elements and prevent the development and transmission of microorganisms. Several polymers containing different nanoparticles have already been offered to day for this purpose. The research presents a novel poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP)/polyvinylpyrrolidone (PVP) polymer composite with MoO3 nanowires with the ability to form coating films on wood. The films of the developed coating exhibit elastic behaviour, which depends on the coating film thickness [tested wet film thicknesses (90, 180 and 360) µm]. The coating showed the ability to interact well with the surface of common beech (Fagus sylvatica L.) wood, in terms of wetting (contact angles of 15.6°), fast spilling on the surface, good penetration of the coating in wood structure and formation of up to 40 µm-thick films with excellent pull-off adhesion strength (6 MPa). An increased roughness of wood coated with C + MoO3 was a consequence of wood etching by the dimethylformamide solvent present in the coating. Moreover, the presence of C + MoO3 on wood made it considerably more hydrophobic, with contact angle of water raising to 123° from initially 46° measured on uncoated wood. The irradiation of wood surfaces with ultra-violet light resulted in visible colour changes on both uncoated and coated wood. The wood coated with C + MoO3 has a good resistance to water, alcohol and dry heat (grade 3 to 4). The antimicrobial testing showed that the presence of MoO3 in the coating plays an important role in the resistance of the coated wood to blue-stain fungi and mould development. The developed PVDF-HFP/PVP/MoO3 coating has an excellent ability to interact with the wood surface and has the potential to be used as a protection for wood in sensitive environments.

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“…Nanostructured molybdenum oxide nanoparticles (MoO 3 NPs) have broadspectrum applications and were effectively used in super-capacitors, photo-catalysis, electro-catalysis and gas sensors (Cheng et al, 2009;Xue et al, 2021). MoO 3 NPs have also broadly used in the biomedical eld owing to their antibacterial and antifungal activity (Shafaei et al, 2017;Alghamdi, 2020).…”

Section: Introductionmentioning

confidence: 99%

Cytotoxic effects of molybdenum oxide nanoparticles and {Mo36} polyoxomolybdate nanoclusters to the green microalga Chlorella vulgaris

Kalehjahi

Kosari‐Nasab

Amini

et al. 2022

Preprint

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In recent years, molybdenum-based nanomaterials have been widely used in different industrial sectors because of their multifunctional properties. Despite their extensive industrialization, there is a lack of needed information concerning their adverse influences on ecosystems and living organisms. In this study, molybdenum oxide nanoparticles (MoO3 NPs) and {Mo36} polyoxomolybdate nanoclusters ({Mo36} NCs) were synthesized using hydrothermal methods and characterized using FT-IR, XRD, and SEM techniques. Subsequently, their toxic effects on the green microalgae Chlorella vulgaris were measured. Both nanomaterials (NMs) induced cytotoxicity by reducing the cell number and biomass of algae in a dose- and time-dependent manner. Scanning electron microscopy revealed shape modification and plasmolysis of the microalgal cells after exposure to nanomaterials. Flow cytometric analyses confirmed the reduction in cell viability in the samples exposed to 100 mg L− 1 of MoO3 NPs and {Mo36} NCs for 4 days. According to the results, MoO3 NPs had more drastic effects on the viability of C. vulgaris cells compared to {Mo36} NCs. In addition, after exposure of algal cells to the high concentrations of nanomaterials, the content of photosynthetic pigments has decreased. Enhanced activities of antioxidative enzymes including superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) concurrent with alteration of phenol and flavonoid contents as non-enzymatic antioxidants indicated the activation of cell defense systems in response to the oxidative stress induced by nanomaterials. Our findings conclusively established that MoO3 NPs and {Mo36} NCs cause life-threatening cytotoxicity in algal cells and induce oxidative stress.

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Cellulose acetate-based composites with antimicrobial properties from embedded molybdenum trioxide particles

Cited by 15 publications

References 46 publications

Antibacterial Activity of Molybdenum Oxide–Polyacrylonitrile Composite Membrane with Fast Silver Ion Reduction

Antibacterial Activity of Molybdenum Oxide–Polyacrylonitrile Composite Membrane with Fast Silver Ion Reduction

Application and characterization of a novel PVDF-HFP/PVP polymer composite with MoO3 nanowires as a protective coating for wood

Cytotoxic effects of molybdenum oxide nanoparticles and {Mo36} polyoxomolybdate nanoclusters to the green microalga Chlorella vulgaris

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