scholarly journals A Brief Review on Atmospheric Air Plasma

2021 ◽  
Vol 2071 (1) ◽  
pp. 012004
Author(s):  
N Z A Zabidi ◽  
S K Zaaba ◽  
K D Eh Sut ◽  
C W S R Mohamad ◽  
R I Masiman
Keyword(s):  
Surface Modification ◽  
Atmospheric Pressure ◽  
Operating Cost ◽  
Air Plasma ◽  
Plasma Technology ◽  
Surface Processing ◽  
Atmospheric Air ◽  
Set Up ◽  
Reactive Atom ◽  
Plasma Configuration

Abstract Atmospheric pressure air plasma is an attractive technology because it is easy to set up and handle, cheap, and safe. In this paper, a brief review on air plasma configuration and the results of air plasma is presented. One of the important properties of any plasma treatment is the generation of reactive atom species such as oxygen(O), nitrogen(N) also known as RONS, and other ions molecules particles. Air plasma has been found to have the same effect when treating surfaces. Surface modification, hydrophilicity, and decontamination effect were observed when materials are exposed to air plasma. The advancement of air plasma technology will improve the surface processing technology by reducing its operating cost.

scholarly journals Hydrophobic Waxes in Ivory Nuts Affect Surface Modification by Atmospheric Air Plasma Jet

2020 ◽  
Vol 2 (2) ◽  
pp. 48-49
Keyword(s):  
Contact Angle ◽  
Surface Modification ◽  
Water Contact Angle ◽  
Plasma Jet ◽  
Raman Imaging ◽  
Wall Material ◽  
Air Plasma ◽  
Water Contact ◽  
Atmospheric Air ◽  
Imaging Results

Ivory nuts, produced by palms from the genus Phytelephas, possess a hard and microporous endosperm with a strong resemblance to elephant ivory. The nuts sustainable appeal made them popular as eco-friendly substitutes to ivory since they promote the development of forest communities without contributing to deforestation and animal poaching. In addition, they have been commercialized as microbeads to replace microplastics in cosmetic applications. However, this material is vulnerable to deterioration by micro-organisms and insects, as they are predominantly constituted by β-1,4-mannan, a hydrophilic polysaccharide similar to cellulose. In this context, seed endosperm was treated for 80 s by an atmospheric air plasma jet so as to modify its wettability, as plasma has been widely studied recently for seed disinfection and surface modification. Plasma treated samples were characterized by the water contact angle, AFM, and Raman imaging. Water contact angle results showed an increase from (31.5 ± 8.7)º to (78.9 ± 5.4)º, indicating incorporation of hydrophobic moieties to the sample surface. In turn, AFM images demonstrate the formation of a rough and heterogeneous coating that resembles epicuticular wax layers. Furthermore, principal component analysis of Raman imaging results evidenced contributions from wax (1156, 1170 and 1410 cm-1), carbohydrates (1020, 1080 and 1106 cm-1), and lignin (1573, 1635 and 1662 cm-1). These results indicate that plasma treatment promoted the migration of hydrophobic waxes to the surface and their crosslinking with fragmented cell wall material such as mannan, xylan, and lignin, promoting seed hydrophobization with no need for additional precursors or generation of side products.

Application of Cold Atmospheric Pressure Plasmas for Biological Tissue Treatment

2015 ◽  
Vol 1084 ◽  
pp. 602-605 ◽  
Author(s):  
Aleksandr N. Aleinik ◽  
Aleksandr N. Baykov ◽  
Georgiy Ts. Dambaev ◽  
Evgeniy V. Semichev
Keyword(s):  
Biological Tissue ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Air Plasma ◽  
Plasma Technology ◽  
Large Application ◽  
Wet Chemical ◽  
Discharge Gap ◽  
Air Plasma Treatment

New experiments using atmospheric pressure plasma have found large application in biology and medicine. Cold air plasma treatment can be used to modify the surface of different materials for a variety of applications. The emission spectroscopy data confirmed the presence of different reactive species in the discharge gap. Surface treatments using this dry plasma technology offer an environmentally friendly alternative to the conventional wet chemical methods of microorganisms destruction, biological tissue treatment, in vitro and in vivo cell treatment. The use of cold plasma technology removes contaminants at the nanometer level.

Surface Modification of Aramid Fiber III by the Atmospheric-Pressure Air Plasma Treatment

2017 ◽  
Vol 893 ◽  
pp. 318-322 ◽  
Author(s):  
Feng De Wang ◽  
Yong Lei Lv ◽  
Xu Wei ◽  
Guo Ling ◽  
Zhe Wen Han
Keyword(s):  
Contact Angle ◽  
Surface Modification ◽  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
Adhesive Force ◽  
Aramid Fiber ◽  
Air Plasma ◽  
Pull Out ◽  
Air Plasma Treatment ◽  
Effect Of Surface

Aramid fiber III has been treated by plasma treatment on different atmosphere gas to enhance the adhesive force between Aramid fiber III and epoxy matrix. The results of contact angle and SEM indicate that the obvious corrosion appear in the surface of aramid fiber III after plasma treatment. The yarn pull-out method was used to evaluate the effect of surface modification. The contact angle of original aramid fiber III is 65.9 o, and after treated the contact angle is declined to 62.2 o. The evaluation results show the tensile strength and NOL ILSS of treated Aramid fiber III/epoxy composite increased by about 10%. In summary, the effect of plasma treatment is obvious and has potential industry application.

Influence of Plasma Chamber Set-Up on the Surface Modification of Non-Vulcanized and Pure SBR Rubber Treated at Radio-Frequencies Air Plasma

2015 ◽  
Vol 12 (10) ◽  
pp. 1139-1152 ◽  
Author(s):  
Alicia Henry ◽  
Marie-France Vallat ◽  
Cédric Noël ◽  
Thierry Belmonte ◽  
Vincent Roucoules
Keyword(s):  
Surface Modification ◽  
Air Plasma ◽  
Plasma Chamber ◽  
Radio Frequencies ◽  
Set Up

Hydrophobic Waxes in Ivory Nuts Affect Surface Modification by Atmospheric Air Plasma Jet

2021 ◽  
Vol 11 (4) ◽  
pp. 12227-12237
Author(s):  
Yuri Ferreira da Silva ◽  
Renata Nunes Oliveira ◽  
Renata Antoun Simao
Keyword(s):  
Contact Angle ◽  
Surface Modification ◽  
Surface Chemistry ◽  
Plasma Treatment ◽  
Water Contact Angle ◽  
Plasma Jet ◽  
Raman Imaging ◽  
Air Plasma ◽  
Water Contact ◽  
Atmospheric Air

Ivory nuts, bioproducts from South American palms, possess a hard, water-insoluble, and microporous endosperm with a strong resemblance to elephant ivory. The nuts sustainable appeal made them popular as eco-friendly substitutes to ivory and, more recently, microbeads. However, their hygroscopicity and mannan composition impart susceptibility to deterioration by microbes and insects. Cold plasma treatment has been widely investigated as a clean and cost-effective procedure for seed disinfection and surface modification. Hence, in this work, ivory nut endosperm was treated by an air plasma jet to modify wettability. Plasma treated samples were characterized by the water contact angle, AFM, and Raman imaging. Water contact angle results presented an increase from (31.5 ± 8.7)º to (78.9 ± 5.4)º, demonstrating surface hydrophobization. This result was attributed to the modification of surface chemistry by migration and repolymerization of extractives promoted by plasma treatment. AFM results evidenced the formation of a heterogeneous layer containing lamellar features similar to plant epicuticular waxes. Besides, principal component analysis of Raman imaging results highlighted spectral contributions from wax, xylan, mannan, and lignin. These results demonstrate that atmospheric air plasma jets can be employed for ivory nut hydrophobization with no need for additional precursors, altering surface chemistry by crosslinking endosperm native substances.

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