Brief Review: Cold Plasma

Zainal, Muhamad Nor Firdaus; Redzuan, Norizah; Misnal, Mohd Fadthul Ikmal

doi:10.11113/jt.v74.4834

Cited by 6 publications

(2 citation statements)

References 17 publications

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“…In order to make them hydrophobic, a process named cold plasma polymerization was employed. It consists of inserting a monomer and an uncoated material in a chamber and using energy via plasma to convert the substance in a grain coating polymer [6]. Monomers used were octafluorcyclobutane (C4F8) and 1H,1H,2H,2H-perfluoroctylacrilate (PFA-C6).…”

Section: Hydrophobic Coating Of the Sandmentioning

confidence: 99%

On the resistance of hydrophobic soil polymer coatings created by cold plasma polymerization

2023

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Hydrophobic soils have natural or artificial origin. In this context, some techniques exist to turn into hydrophobic sand that was originally hydrophilic, as most soils in fact are. Its classical application is impermeabilizing structures where water percolation is not desired. In this paper, a new technique to achieve hydrophobicity is described. It consists of coating particles via cold plasma. The process is known to the industry, but its application in geotechnics is not yet described in literature. The monomers used were octafluorcyclobutane (C4F8) and 1H,1H,2H,2H-perfluoroctylacrilate (PFA-C6). For each monomer, the material was in the coating chamber during two different time spans and a sample was pretreated with oxygen. Different mechanical, thermal and hydraulic conditions were imposed to the samples in order to evaluate the resistance of the coating and its properties. The hydrophobicity was evaluated by means of Water Drop Penetration Time. Results indicate that longer time spans in the cold plasma chamber lead to a more hydrophobic material and that oxygen pretreatment on the sample is irrelevant. It was also observed that mechanical, hydraulic and thermal procedures influence the coating. These observations lead to optimization of the production process and to the understanding of how the material can be applied in the construction industry and what mechanical/hydraulic loads it can be subjected to.

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Section: Hydrophobic Coating Of the Sandmentioning

confidence: 99%

On the resistance of hydrophobic soil polymer coatings created by cold plasma polymerization

2023

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“…A non-thermal plasma (NTP) technology has emerged in recent times, which has been studied largely for sterilization and indoor air purification 22 – 24 . High-energy electrons (1–10 eV) are produced in NTP, and the background gases remain near room temperature, which is also referred to as a cold plasma 25 . The main factors influencing the antimicrobial effects of NTP are localized electric fields, reactive oxygen species (ROS), and charged particles (positive and negative ions) 26 .…”

Section: Introductionmentioning

confidence: 99%

Efficient deactivation of aerosolized pathogens using a dielectric barrier discharge based cold-plasma detergent in environment device for good indoor air quality

Jangra

Ahlawat

Dixit

et al. 2023

Sci Rep

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Air pollution is one of the top 5 risks causing chronic diseases according to WHO and airborne transmitted pathogens infection is a huge challenge in the current era. Long living pathogens and small size aerosols are not effectively dealt with by the available indoor air purifiers. In this work, a dielectric barrier discharge (DBD) based portable cold-plasma detergent in environment device is reported and its disinfection efficiency has been analyzed in the indoor environment of sizes up to 3 × 2.4 × 2.4 m3. The deactivation efficiency of total microbial counts (TMCs) and total fungal counts (TFCs) is found to be more than 99% in 90 min of continuous operation of the device at the optimized parameters. The complete inactivation of MS2 phage and Escherichia coli bacteria with more than 5 log reduction (99.999%) has also been achieved in 30 min and 90 min of operation of the device in an enclosed environment. The device is able to produce negative ions predominantly dominated by natural plasma detergent along with positive ions in the environment similar to mother nature. The device comprises a coaxial DBD geometry plasma source with a specially designed wire mesh electrode of mild steel with a thickness of 1 mm. The need for feed gas, pellets and/or differential pressure has been eliminated from the DBD discharge source for efficient air purification. The existence of negative ions for more than 25 s on average is the key advantage, which can also deactivate long living pathogens and small size aerosols.

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Cold plasma technology: advanced and sustainable approach for wastewater treatment

Gururani

Bhatnagar

Bisht

et al. 2021

Environ Sci Pollut Res

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Cold plasma has been a potent energy-efficient and eco-friendly advanced oxidation technology which has gained attention in recent decades as a non-thermal approach in diverse forms of applications. This review highlights a comprehensive account of the implementation of this technology in the field of wastewater treatment to resolve certain issues regarding the degradation of numerous aqueous pollutants and water-borne pathogenic microorganisms including viruses up to a significant level. The paper addresses plasma chemistry sources and mechanisms on wastewater treatment and impact on various physical, chemical, and biological characteristics of treated water. Furthermore, studies have revealed that this emerging technology is effective in inactivating SARS-CoV-2 or coronavirus, which serves as a transmission channel for this lethal virus in wastewater. Despite these benefits, the development of cold plasma as a wastewater treatment technique is still hampered by a lack of information like capital investment, proficient application, liveability, and operating cost, thus necessitating additional research for its booming commercialization, as this can be an emerging approach to solving water crises and meeting the demand for fresh or potable water resources.

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Brief Review: Cold Plasma

Cited by 6 publications

References 17 publications

On the resistance of hydrophobic soil polymer coatings created by cold plasma polymerization

On the resistance of hydrophobic soil polymer coatings created by cold plasma polymerization

Efficient deactivation of aerosolized pathogens using a dielectric barrier discharge based cold-plasma detergent in environment device for good indoor air quality

Cold plasma technology: advanced and sustainable approach for wastewater treatment

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