Antimicrobial silicone rubbers based on photocatalytically active additives

Fischer, Tatjana; Suttor, Susana; Mansi, Salma; Osthues, Lucas; Mela, Petra

doi:10.1002/app.51352

Cited by 4 publications

(1 citation statement)

References 56 publications

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“…The loss of the antimicrobial effect in the case of surface damage is a particular aspect of coatings that needs to be considered. To avoid this problem, we recently proposed incorporating particles directly in the bulk of the polymer [31].…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial Activity of a Titanium Dioxide Additivated Thermoset

et al. 2022

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The transmission of pathogens via surfaces poses a major health problem, particularly in hospital environments. Antimicrobial surfaces can interrupt the path of spread, while photocatalytically active titanium dioxide (TiO2) nanoparticles have emerged as an additive for creating antimicrobial materials. Irradiation of such particles with ultraviolet (UV) light leads to the formation of reactive oxygen species that can inactivate bacteria. The aim of this research was to incorporate TiO2 nanoparticles into a cellulose-reinforced melamine-formaldehyde resin (MF) to obtain a photocatalytic antimicrobial thermoset, to be used, for example, for device enclosures or tableware. To this end, composites of MF with 5, 10, 15, and 20 wt% TiO2 were produced by ultrasonication and hot pressing. The incorporation of TiO2 resulted in a small decrease in tensile strength and little to no decrease in Shore D hardness, but a statistically significant decrease in the water contact angle. After 48 h of UV irradiation, a statistically significant decrease in tensile strength for samples with 0 and 10 wt% TiO2 was measured but with no statistically significant differences in Shore D hardness, although a statistically significant increase in surface hydrophilicity was measured. Accelerated methylene blue (MB) degradation was measured during a further 2.5 h of UV irradiation and MB concentrations of 12% or less could be achieved. Samples containing 0, 10, and 20 wt% TiO2 were investigated for long-term UV stability and antimicrobial activity. Fourier-transform infrared spectroscopy revealed no changes in the chemical structure of the polymer, due to the incorporation of TiO2, but changes were detected after 500 h of irradiation, indicating material degradation. Specimens pre-irradiated with UV for 48 h showed a total reduction in Escherichia coli when exposed to UV irradiation.

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Section: Introductionmentioning

confidence: 99%

Antimicrobial Activity of a Titanium Dioxide Additivated Thermoset

et al. 2022

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Significant role of novel additives in improving the antibacterial properties of rubber composite: A comprehensive review

Kandil

2024

Vinyl Additive Technology

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Antibacterial products have gained considerable attention from both the academic and industrial communities due to the transmission of several infectious diseases which has raised public awareness of the disinfection pathways of such highly infectious bacteria. Among the materials that have raised public awareness are rubber composite materials as they are present in many different applications, such as medical apparatus, health care products, food packaging, and house furnishings Therefore, the development of rubber‐composite‐based materials with antibacterial activity is crucial to avoid the propagation of pathogens. In this regard, researchers have directed their focus toward the development of innovative additives with antibacterial properties to enhance the antibacterial activities of rubber composites. Several promising additives have emerged, most notably metal and metal oxide nanoparticles, biopolymers, plant‐derived materials, and synthetic organic compounds. The studies have shown that the incorporation of these additives endows the rubber composites with antibacterial properties, making them applicable in a range of biomedical uses. In light of these findings, the present review aims to cover recent works to improve the antibacterial properties of rubber composites using different additives.Highlights Rubber composite materials, found in various applications like medical apparatus and food packaging, have raised public awareness of infection prevention. Development of rubber‐composite‐based materials with antibacterial activity is crucial for preventing pathogen propagation. Researchers focus on innovative additives, including metal nanoparticles, biopolymers, plant‐derived materials, and synthetic organic compounds, to enhance antibacterial properties. Incorporating these additives into rubber composites endows them with antibacterial properties, suitable for biomedical applications.

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