The significant adhesion enhancement of Ag–polytetrafluoroethylene antibacterial coatings by using of molecular bridge

Guo, Ruijie; Yin, Guangda; Sha, Xiaojuan; Zhao, Qi; Wei, Liqing; Wang, Hong

doi:10.1016/j.apsusc.2015.02.131

Cited by 15 publications

(7 citation statements)

References 20 publications

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“…The Ag and Ag-PTFE-coated catheters were then prepared according to the previous methods. 21,22 For the Ag-PTFE coating, in order to obtain a uniform dispersion of PTFE particles in the plating bath, 5 mg/L of PTFE emulsion (60.0 wt % with PTFE particle size in the range 0.05−0.5 μm, Sigma-Aldrich, Gillingham, U.K.) and 0.2 g/L of FC-4 cationic surfactant (Guangang Technology, Shanghai, China) were added and the mixture was thoroughly mixed by sonication for 10 min at room temperature. 23 The obtained samples were rinsed with 0.1 M HNO 3 , Milli-Q water, and ethanol in sequence and finally air-dried at room temperature.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Enhanced Antibacterial and Antiadhesive Activities of Silver-PTFE Nanocomposite Coating for Urinary Catheters

Zhang

Wang

Liang

et al. 2019

ACS Biomater. Sci. Eng.

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Catheter-associated urinary tract infection (CAUTI) presents a significant health problem worldwide and is associated with increased morbidity and mortality. Herein, a silver-polytetrafluoroethylene (Ag-PTFE) nanocomposite coating for catheters was developed via a facile wet chemistry method. Benefiting from the synergistic effect of Ag and PTFE, the as-prepared Ag-PTFE-coated catheter exhibited enhanced antibacterial and antiadhesive activities against two CAUTI-associated strains: E. coli WT F1693 and S. aureus F1557. Compared to the uncoated commercial silicone catheters and the Ag-coated catheters, the Ag-PTFE-coated catheters were able to reduce bacterial adhesion by up to 60.3% and 55.2%, respectively. The Ag-PTFE-coated catheters also exhibited strong antibiofilm activity, reducing biofilm coverage by up to 97.4% compared with the commercial silicone catheters. In an in vitro bladder model, the Ag-PTFE-coated catheter displayed excellent anti-infection efficacy against bacteriuria, extending the lifetime of silicone catheters from a mean of 6 days to over 40 days. The Ag-PTFE coating also showed good biocompatibility with fibroblast cells in culture, making it a prospective strategy to overcome current challenges in CAUTI.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Enhanced Antibacterial and Antiadhesive Activities of Silver-PTFE Nanocomposite Coating for Urinary Catheters

Zhang

Wang

Liang

et al. 2019

ACS Biomater. Sci. Eng.

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“…Silver nanostructures on the PTFE surface were also investigated to study antimicrobial activity. The incorporated silver nanostructures in the PTFE surface showed great antibacterial activity against E. coli demonstrated by 99.9% growth reduction after 24 h [ 19 ], which does not hold for uncoated PTFE samples [ 20 ]. Similar to PTFE, antibacterial properties of activated perfluorooxy alkanes [ 21 ], such as PFA [ 22 ], were also studied, for which changes in hydrophilic to hydrophobic properties during the grafting process play an important role [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Properties of Plasma-Activated Perfluorinated Substrates with Silver Nanoclusters Deposition

et al. 2021

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This article is focused on the evaluation of surface properties of polytetrafluoroethylene (PTFE) nanotextile and a tetrafluoroethylene-perfluoro(alkoxy vinyl ether) (PFA) film and their surface activation with argon plasma treatment followed with silver nanoclusters deposition. Samples were subjected to plasma modification for a different time exposure, silver deposition for different time periods, or their combination. As an alternative approach, the foils were coated with poly-L-lactic acid (PLLA) and silver. The following methods were used to study the surface properties of the polymers: goniometry, atomic force microscopy, and X-ray photoelectron microscopy. By combining the aforementioned methods for material surface modification, substrates with antibacterial properties eliminating the growth of Gram-positive and Gram-negative bacteria were prepared. Studies of antimicrobial activity showed that PTFE plasma-modified samples coated with PLLA and deposited with a thin layer of Ag had a strong antimicrobial effect, which was also observed for the PFA material against the bacterial strain of S. aureus. Significant antibacterial effect against S. aureus, Proteus sp. and E. coli has been demonstrated on PTFE nanotextile plasma-treated for 240 s, coated with PLLA, and subsequently sputtered with thin Ag layer.

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“…The alkaline cleaning solution comprised NaOH 25 g l , and the pickling solution was HCl 30%: H 2 O (1:1 in volume). After this, both sides of the disks were irradiated with UV light at 385 nm for 2 h to activate the inert Ti surfaces, then the disks were immersed in a coupling agent solution for 2 h in order to create the reactive surfaces using the method described previously (Guo et al 2015). TiO 2 powder with a particle size of 25 nm (Sigma-Aldrich, Dorset, UK) was used.…”

Section: Preparation Of Ag-tio 2 Coatingsmentioning

confidence: 99%

Mechanisms of the enhanced antibacterial effect of Ag-TiO₂ coatings

Liu

Geng

et al. 2018

Biofouling

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It has been demonstrated that Ag-TiO 2 nanocomposite coatings with excellent antimicrobial activity and biocompatibility have the potential to reduce infection problems. However, the mechanism of the synergistic effect of Ag-TiO 2 coatings on antibacterial efficiency is still not well understood. In this study, five types of Ag-TiO 2 nanocomposited coatings with different TiO 2 contents were prepared on a titanium substratum. Leaching tests indicated that the incorporation of TiO 2 nanoparticles into an Ag matrix significantly promoted Ag ion release. Surface energy measurements showed that the addition of TiO 2 nanoparticles also significantly increased the electron donor surface energy of the coatings. Bacterial adhesion assays with Escherichia coli and Staphylococcus aureus demonstrated that the number of adhered bacteria decreased with increasing electron donor surface energy. The increased Ag ion release rate and the increased electron donor surface energy contributed to an enhanced antibacterial efficiency of the coatings.

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The significant adhesion enhancement of Ag–polytetrafluoroethylene antibacterial coatings by using of molecular bridge

Cited by 15 publications

References 20 publications

Enhanced Antibacterial and Antiadhesive Activities of Silver-PTFE Nanocomposite Coating for Urinary Catheters

Enhanced Antibacterial and Antiadhesive Activities of Silver-PTFE Nanocomposite Coating for Urinary Catheters

Antibacterial Properties of Plasma-Activated Perfluorinated Substrates with Silver Nanoclusters Deposition

Mechanisms of the enhanced antibacterial effect of Ag-TiO₂ coatings

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The significant adhesion enhancement of Ag–polytetrafluoroethylene antibacterial coatings by using of molecular bridge

Cited by 15 publications

References 20 publications

Enhanced Antibacterial and Antiadhesive Activities of Silver-PTFE Nanocomposite Coating for Urinary Catheters

Enhanced Antibacterial and Antiadhesive Activities of Silver-PTFE Nanocomposite Coating for Urinary Catheters

Antibacterial Properties of Plasma-Activated Perfluorinated Substrates with Silver Nanoclusters Deposition

Mechanisms of the enhanced antibacterial effect of Ag-TiO2 coatings

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Mechanisms of the enhanced antibacterial effect of Ag-TiO₂ coatings