Developing antibacterial superhydrophobic coatings based on polydimethylsiloxane/silver phosphate nanocomposites: Assessment of surface morphology, roughness and chemistry

Seyfi, Javad; Goodarzi, Vahabodin; Wurm, Frederik R.; Shojaei, Shahrokh; Jafari-Nodoushan, Milad; Najmoddin, Najmeh; Khonakdar, Hossein Ali; Baghersad, Mohammad Hadi; Uzun, Lokman

doi:10.1016/j.porgcoat.2020.105944

Cited by 29 publications

(22 citation statements)

References 45 publications

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“…To better compare the roughened structures for the nanocomposite samples, the roughness parameters are reported in Table 1. According to this table, the average roughness ( Ra ) and the root mean square roughness ( Rq ), which are commonly used to describe the surface roughness profiles, 31,32 were found to be very small values (6.1 and 8.1 nm) for the pure VE coating. As expected, the addition of 5 wt% of silica aerogels led to no considerable changes in the roughness parameters ( Ra = 10.4 nm and Rq = 12.7 nm).…”

Section: Resultsmentioning

confidence: 99%

Vinyl ester/silica aerogel nanocomposite coatings with enhanced hydrophobicity and corrosion protection properties

Motlagh

Seyfi

Khonakdar

et al. 2021

Polymers for Advanced Techs

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Vinyl ester (VE) resins have been widely used in the coating industry. However, research on its potential in anti‐corrosion applications has been limited. In this work, silica aerogels were first synthesized and then incorporated into the VE resin at 5, 10, and 15 wt% with respect to the VE content. Based on the morphological results, higher inclusions of silica aerogels (10 and 15 wt%) were significantly aggregated at the surface layer of the coatings leading to a highly rough surface structure which was also proved by atomic force microscopy. In fact, the aerogel nanoparticles formed a very packed structure leading to the formation of an effective physical barrier against corrosive agents. Fourier‐transform infrared spectroscopy also revealed that the nanocomposite coatings exhibited a lower water absorption behavior which could be beneficial for the anti‐corrosion behavior. Wetting results demonstrated that the water contact angle has essentially increased from 61° for the pure VE coating to 92° for the aerogel‐loaded coating. Such enhancement in hydrophobicity and also the creation of a physical barrier at the surface layer of the coatings led to promising barrier results as found by Tafel polarization curves. The protection efficiency was dramatically improved to 97.9% for the highest inclusion of silica aerogel.

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Section: Resultsmentioning

confidence: 99%

Vinyl ester/silica aerogel nanocomposite coatings with enhanced hydrophobicity and corrosion protection properties

Motlagh

Seyfi

Khonakdar

et al. 2021

Polymers for Advanced Techs

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“…Similar results were reported by Ghaffari‐Moghaddam et al 55 for their polyaniline/PVA/Ag nanocomposite with maximum activity at 15 wt% concentration. Seyfi et al achieved 99.9% antimicrobial activity with 7 wt% of the Ag 3 PO 4 nanoparticles, 56 and proposed that the electrostatic attractions between positively charged Ag + ions of the nanoparticles and the negatively charged cell membrane of bacteria are mainly responsible for the bactericidal behavior of silver‐containing composites. In addition, the surface wettability also plays a role in reducing bacterial growth as the super hydrophobic samples extends the cells‐membrane physical distance and kinetic barrier for the microorganisms.…”

Section: Resultsmentioning

confidence: 99%

In situ synthesized amphiphilic polysulfone‐poly(ethylene‐glycol) block copolymer/silver nanocomposite for separating oil/water emulsion

Elgawady

Ponnamma

Hassan

et al. 2021

J of Applied Polymer Sci

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This work reports the synthesis of silver nanoparticles from the precursors, silver nitrate and sodium bromide, and the in situ synthesis of polysulfone (PSf)‐poly(ethylene‐glycol) (PEG) block copolymer (BCP) in the presence of developed Ag. The PSf‐PEG BCP nanocomposite containing 3 wt.% of the nanoparticles, when electrospun, is observed to be helpful in separating the oil‐in‐water emulsion. Mechanical properties such as dynamic mechanical strength and tensile strength measurements and high thermal degradation temperature (~6°C) illustrate the reinforcing effect of the Ag nanoparticles. The presence of Ag influences the glass transition temperature (Tg) of the BCP and its elasticity due to its well distribution in the BCP during the in situ synthesis of nanocomposite. Electrospun fiber mat of the in situ synthesized PSf‐PEG/Ag nanocomposite shows improved wettability as evident from the respective aqueous contact angle values of 80.66° ± 1.3, 85.70° ± 2.0, and 101.50° ± 1.0 for PSf‐PEG/Ag, PSf‐PEG, and neat PSf. The combination of PEG to PSf has increased the overall polymer reinforcement effect, and this property along with the antimicrobial activity (inhibited growth of Staphylococcus aureus) of Ag nanoparticles are applied in developing bio‐fouling resistant BCP nanocomposite fibers for oil/water emulsion separation.

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“…Notably, titanium and titanium alloys are widely applied in biomedical devices, such as cardiovascular stents, lead wires, and artificial blood pumps as a result of their biocompatibility [ 46 ]. Other reported substrates include pyrolytic carbon [ 47 ], thermoplastic polyurethane (TPU) [ 48 , 49 , 50 ], polyvinyl chloride (PVC) [ 28 ] and poly(tetrafluoroethylene) (PTFE) [ 51 , 52 ]. Depending on the application, polymers are more suitable for flexible substrates as a result of their versatile macromolecule structures and ease of processability [ 53 ] while metals, glasses, and silicon-containing inorganic materials are preferred for flat rigid surfaces for their patterned lattice structures [ 54 , 55 ] Researchers have also tried coatings on different substrates, organic and inorganic, rigid and flexible, to compare results and test the versatility of their coating method or material.…”

Section: Materials For Superhydrophobicitymentioning

confidence: 99%

“…Besides hydrothermal methods, micro-arc oxidation, electrodeposition, and ion beam sputtering are also possible methods to fabricate hydroxyapatite coatings [ 41 ]. As a result of the antibacterial behavior of silver, silver is also developed into superhydrophobic anti-microbial coatings with low protein adsorption [ 50 , 77 ]. Among various silver-containing materials, silver phosphate has the advantage of slowly releasing Ag + ions which could result in lower cytotoxicity [ 78 ].…”

Section: Materials For Superhydrophobicitymentioning

confidence: 99%

Recent Developments in Blood-Compatible Superhydrophobic Surfaces

Wang

Paul

Stein³

et al. 2022

Polymers

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Superhydrophobic surfaces, as indicated in the name, are highly hydrophobic and readily repel water. With contact angles greater than 150° and sliding angles less than 10°, water droplets flow easily and hardly wet these surfaces. Superhydrophobic materials and coatings have been drawing increasing attention in medical fields, especially on account of their promising applications in blood-contacting devices. Superhydrophobicity controls the interactions of cells with the surfaces and facilitates the flowing of blood or plasma without damaging blood cells. The antibiofouling effect of superhydrophobic surfaces resists adhesion of organic substances, including blood components and microorganisms. These attributes are critical to medical applications such as filter membranes, prosthetic heart valves, extracorporeal circuit tubing, and indwelling catheters. Researchers have developed various methods to fabricate blood-compatible or biocompatible superhydrophobic surfaces using different materials. In addition to being hydrophobic, these surfaces can also be antihemolytic, antithrombotic, antibacterial, and antibiofouling, making them ideal for clinical applications. In this review, the authors summarize recent developments of blood-compatible superhydrophobic surfaces, with a focus on methods and materials. The expectation of this review is that it will support the biomedical research field by providing current trends as well as future directions.

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Developing antibacterial superhydrophobic coatings based on polydimethylsiloxane/silver phosphate nanocomposites: Assessment of surface morphology, roughness and chemistry

Cited by 29 publications

References 45 publications

Vinyl ester/silica aerogel nanocomposite coatings with enhanced hydrophobicity and corrosion protection properties

Vinyl ester/silica aerogel nanocomposite coatings with enhanced hydrophobicity and corrosion protection properties

In situ synthesized amphiphilic polysulfone‐poly(ethylene‐glycol) block copolymer/silver nanocomposite for separating oil/water emulsion

Recent Developments in Blood-Compatible Superhydrophobic Surfaces

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