Role of superhydrophobic coatings in biomedical applications

Kumar, Ravinder; Sahani, Ashish Kumar

doi:10.1016/j.matpr.2021.02.457

Cited by 17 publications

(15 citation statements)

References 28 publications

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“…However, superhydrophobic surfaces could present a long-lasting solution to control the spread of infectious bacteria as they are purely structural and do not develop bacterial resistance. They are particularly desirable as antibacterial surfaces because of their ability to self-clean [11], by repelling water from their surface due to large contact angles > 150 • between the liquid droplets and the surface itself [151]. There are several examples of superhydrophobic surfaces in nature such as the lotus leaf [8], springtails (Collembola, Entognatha) [9], and termite wings (Nasutitermes sp.)…”

Section: Superhydrophobic Surfacesmentioning

confidence: 99%

Recent Advances in Metal-Based Antimicrobial Coatings for High-Touch Surfaces

Birkett

Dover

Lukose

et al. 2022

IJMS

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International interest in metal-based antimicrobial coatings to control the spread of bacteria, fungi, and viruses via high contact human touch surfaces are growing at an exponential rate. This interest recently reached an all-time high with the outbreak of the deadly COVID-19 disease, which has already claimed the lives of more than 5 million people worldwide. This global pandemic has highlighted the major role that antimicrobial coatings can play in controlling the spread of deadly viruses such as SARS-CoV-2 and scientists and engineers are now working harder than ever to develop the next generation of antimicrobial materials. This article begins with a review of three discrete microorganism-killing phenomena of contact-killing surfaces, nanoprotrusions, and superhydrophobic surfaces. The antimicrobial properties of metals such as copper (Cu), silver (Ag), and zinc (Zn) are reviewed along with the effects of combining them with titanium dioxide (TiO2) to create a binary or ternary contact-killing surface coatings. The self-cleaning and bacterial resistance of purely structural superhydrophobic surfaces and the potential of physical surface nanoprotrusions to damage microbial cells are then considered. The article then gives a detailed discussion on recent advances in attempting to combine these individual phenomena to create super-antimicrobial metal-based coatings with binary or ternary killing potential against a broad range of microorganisms, including SARS-CoV-2, for high-touch surface applications such as hand rails, door plates, and water fittings on public transport and in healthcare, care home and leisure settings as well as personal protective equipment commonly used in hospitals and in the current COVID-19 pandemic.

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Section: Superhydrophobic Surfacesmentioning

confidence: 99%

Recent Advances in Metal-Based Antimicrobial Coatings for High-Touch Surfaces

Birkett

Dover

Lukose

et al. 2022

IJMS

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“…Polydimethylsiloxane (PDMS) is an elastomeric polymer with interesting properties for biomedical applications, including physiological indifference, excellent resistance to biodegradation, biocompatibility, chemical stability, gas permeability, good mechanical properties, excellent optical transparency and simple fabrication by replica moulding [ 1 , 2 , 3 , 4 , 5 ]. Due to these characteristics, PDMS has been widely used in micropumps [ 6 ], catheter surfaces [ 7 ], dressings and bandages [ 8 ], microvalves [ 9 ], optical systems [ 10 , 11 ], in the in vitro study of diseases [ 12 , 13 ], in implants [ 14 , 15 ], in microfluidics and photonics [ 16 , 17 , 18 , 19 ]. Moreover, soft-lithography technology has driven the use of PDMS in microelectromechanical systems (MEMS) applications and in microfluidic components [ 17 , 18 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Properties and Applications of PDMS for Biomedical Engineering: A Review

Miranda

Souza

Sousa

et al. 2021

JFB

267

170

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Polydimethylsiloxane (PDMS) is an elastomer with excellent optical, electrical and mechanical properties, which makes it well-suited for several engineering applications. Due to its biocompatibility, PDMS is widely used for biomedical purposes. This widespread use has also led to the massification of the soft-lithography technique, introduced for facilitating the rapid prototyping of micro and nanostructures using elastomeric materials, most notably PDMS. This technique has allowed advances in microfluidic, electronic and biomedical fields. In this review, an overview of the properties of PDMS and some of its commonly used treatments, aiming at the suitability to those fields’ needs, are presented. Applications such as microchips in the biomedical field, replication of cardiovascular flow and medical implants are also reviewed.

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“…Superhydrophobicity (or ultrahydrophobicity) technology has been developed for outdoor insulators exposed to accretion and icing [ 62 ] as well as solar panels [ 63 ]. A superhydrophobic surface (first seen in lotus leaves) is difficult to wet, possesses self-cleaning characteristics, and has a contact angle greater than 150 degrees and a sliding angle (or contact angle hysteresis) less than ten (10) degrees (see Figure 10 ) [ 64 , 65 , 66 ]. Superhydrophobicity is a nature-inspired technology from lotus leaves, rice leaves, mosquito eyes, butterfly wings, rose petals, snail shells and fish scales [ 67 ].…”

Section: Superhydrophobicity and Online Ageing Detectionmentioning

confidence: 99%

“…Most works on superhydrophobic coating are applied to outdoor insulators, biomedical instruments [ 65 ] and non-intrusive measurement technology. However, more research is needed to assess the potency of superhydrophobicity in guaranteeing the reliability of intrusive online ageing detection technology for transformer oil applications prone to ABPs.…”

Section: Superhydrophobicity and Online Ageing Detectionmentioning

confidence: 99%

Towards Online Ageing Detection in Transformer Oil: A Review

Elele

Nekahi

Ali

et al. 2022

Sensors

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Transformers play an essential role in power networks, ensuring that generated power gets to consumers at the safest voltage level. However, they are prone to insulation failure from ageing, which has fatal and economic consequences if left undetected or unattended. Traditional detection methods are based on scheduled maintenance practices that often involve taking samples from in situ transformers and analysing them in laboratories using several techniques. This conventional method exposes the engineer performing the test to hazards, requires specialised training, and does not guarantee reliable results because samples can be contaminated during collection and transportation. This paper reviews the transformer oil types and some traditional ageing detection methods, including breakdown voltage (BDV), spectroscopy, dissolved gas analysis, total acid number, interfacial tension, and corresponding regulating standards. In addition, a review of sensors, technologies to improve the reliability of online ageing detection, and related online transformer ageing systems is covered in this work. A non-destructive online ageing detection method for in situ transformer oil is a better alternative to the traditional offline detection method. Moreover, when combined with the Internet of Things (IoT) and artificial intelligence, a prescriptive maintenance solution emerges, offering more advantages and robustness than offline preventive maintenance approaches.

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Role of superhydrophobic coatings in biomedical applications

Cited by 17 publications

References 28 publications

Recent Advances in Metal-Based Antimicrobial Coatings for High-Touch Surfaces

Recent Advances in Metal-Based Antimicrobial Coatings for High-Touch Surfaces

Properties and Applications of PDMS for Biomedical Engineering: A Review

Towards Online Ageing Detection in Transformer Oil: A Review

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