Plasma Modification at Atmospheric Pressure

1997 ◽  
pp. 379-393 ◽  
Author(s):  
Masuhiro Kogoma ◽  
Ronan Prat ◽  
Toshitugu Suwa ◽  
Atushi Takeda ◽  
Satiko Okazaki ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Plasma Modification

scholarly journals SOLUTION PLASMA PROCESSING OF NATURAL POLYMER-BASED MATERIALS

2019 ◽  
Vol 62 (7) ◽  
pp. 4-30 ◽  
Author(s):  
Andrei Choukourov
Keyword(s):  
Atmospheric Pressure ◽  
Press Cake ◽  
Atmospheric Pressure Plasma ◽  
Active Species ◽  
Perennial Grasses ◽  
Plasma Modification ◽  
Reactive Medium ◽  
Wet Chemistry ◽  
Solution Plasma Processing ◽  
By Products

Non-equilibrium low-temperature atmospheric pressure plasma is a highly reactive medium that allows for the ecofriendly modification of nature-derived materials. This work reviews the field of liquid phase plasma modification of polymer-based materials derived from natural sources. Types of solution plasma systems are considered with respect to the efficiency of the generation of active species, their transport to and interaction with macromolecules. Tunable modification of plants (birch, willow, bamboo and vine shoots; barley, rice and rapeseed straw; perennial grasses), algae, plant-derived by-products and wastes (sawdust, bast fibers, nutshells, seeds, peels, press-cake and pomace), plant-derived polymers (cellulose, hemicellulose, lignin, starch, sodium alginate) and animal-derived polymer-based materials (chitosan, collagen, gelatin) by solution plasma treatment is compared to conventional wet chemistry methods. Synthesis of nano-biocomposites with advanced functionalities is also considered. <span style="opacity: 0;"> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . </span><span style="opacity: 0;"> . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . </span>

scholarly journals Atmospheric pressure plasma treatment of polyamide-12 foils

2014 ◽  
Vol 13 (1) ◽  
Author(s):  
Jana Hanusová ◽  
Dušan Kováčik ◽  
Monika Stupavská ◽  
Mirko Černák ◽  
Igor Novák
Keyword(s):  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Contact Angle Measurement ◽  
Angle Measurement ◽  
Plasma Modification ◽  
Adhesive Properties ◽  
Plasma Sources ◽  
Polyamide 12 ◽  
Pressure Plasma

AbstractThe surface of a polyamide-12 (PA-12) foil was modified in order to improve the adhesive properties by two types of atmospheric pressure plasma sources. The samples were characterized using contact angle measurement, adhesive properties measurement and X-ray photoelectron spectroscopy (XPS). The ageing of the plasma modification was also studied. A significant increase in wettability was observed at different treatment times. The same effect was also seen in the adhesive properties - the adhesion was increased almost 12 times for 10 s DCSBD treatment in comparison to untreated PA-12. XPS analysis confirmed chemical changes due to the plasma modification of the PA-12. It was concluded that both plasma sources improve the adhesive properties of PA-12, with DCSBD obtaining better results.

scholarly journals IMMOBILISATION OF HUMIC SUBSTANCES USING PLASMA MODIFICATION

2015 ◽  
Vol 55 (2) ◽  
pp. 96-100 ◽  
Author(s):  
Pavlína Hájková ◽  
David Tichý ◽  
Jiří Čmelík ◽  
Petr Antoš
Keyword(s):  
Aqueous Solution ◽  
Humic Substances ◽  
Atmospheric Pressure ◽  
Barrier Discharge ◽  
Reference Sample ◽  
Nonwoven Fabric ◽  
Sem Analysis ◽  
Plasma Modification ◽  
Potassium Humate ◽  
Eds Analysis

<span lang="EN-US">This paper presents a study of the immobilization of humic substances (HSs) on a polypropylene (PP) nonwoven fabric. In order to attach the HSs, the PP nonwoven fabric was modified in a volume of nonthermal atmospheric pressure dielectric barrier discharge (DBD) under defined conditions. An unmodified PP nonwoven fabric was used as a reference sample. The modified and unmodified samples were both dipped in an aqueous solution of potassium humate, and then the samples were washed in water and the amount of HSs attached to the PP fabric was monitored. An aqueous solution of cadmium salts was filtered through the treated fabric, the content of Cd<sup>2+</sup> in the solution was monitored using ICP-OES analysis, and the Cd<sup>2+</sup> sorbed on the fabric was proved by SEM/EDS analysis. The efficiency of the PP plasma modification was proved by XPS analysis, and the presence and the distribution of the HSs along the fibers was proved by SEM analysis.</span>

scholarly journals Effect of Atmospheric Pressure Plasma Modification on Polyimide and Adhesive Joining with Titanium

2015 ◽  
Vol 46 (10) ◽  
pp. 4680-4687 ◽  
Author(s):  
M. Akram ◽  
K. M. B. Jansen ◽  
L. J. Ernst ◽  
S. Bhowmik ◽  
G. Ajeesh ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Atmospheric Pressure Plasma ◽  
Plasma Modification ◽  
Pressure Plasma

scholarly journals Plasma Modification and Synthesis of Membrane Materials—A Mechanistic Review

Membranes ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 56 ◽  
Author(s):  
Jingshi Wang ◽  
Xiao Chen ◽  
Rackel Reis ◽  
Zhiqiang Chen ◽  
Nick Milne ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
High Performance ◽  
Large Scale ◽  
Low Pressure ◽  
Water Desalination ◽  
Atmospheric Environment ◽  
Plasma Modification ◽  
Membrane Modification ◽  
The Impact ◽  
Plasma Techniques

Although commercial membranes are well established materials for water desalination and wastewater treatment, modification on commercial membranes is still necessary to deliver high-performance with enhanced flux and/or selectivity and fouling resistance. A modification method with plasma techniques has been extensively applied for high-performance membrane production. The paper presents a mechanistic review on the impact of plasma gas and polymerization, at either low pressure or atmospheric pressure on the material properties and performance of the modified membranes. At first, plasma conditions at low-pressure such as plasma power, gas or monomer flow rate, reactor pressure, and treatment duration which affect the chemical structure, surface hydrophilicity, morphology, as well as performance of the membranes have been discussed. The underlying mechanisms of plasma gas and polymerization have been highlighted. Thereafter, the recent research in plasma techniques toward membrane modification at atmospheric environment has been critically evaluated. The research focuses of future plasma-related membrane modification, and fabrication studies have been predicted to closely relate with the implementation of the atmospheric-pressure processes at the large-scale.

A High-Voltage Terminal for a Field-Emission Gun

1972 ◽  
Vol 30 ◽  
pp. 428-429
Author(s):  
N. F. Ziegler
Keyword(s):  
Field Emission ◽  
High Voltage ◽  
Atmospheric Pressure ◽  
Power Supplies ◽  
High Coherence

A high-voltage terminal has been constructed for housing the various power supplies and metering circuits required by the field-emission gun (described elsewhere in these Proceedings) for the high-coherence microscope. The terminal is cylindrical in shape having a diameter of 14 inches and a length of 24 inches. It is completely enclosed by an aluminum housing filled with Freon-12 gas at essentially atmospheric pressure. The potential of the terminal relative to ground is, of course, equal to the accelerating potential of the microscope, which in the present case, is 150 kilovolts maximum.

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