Oxygen microwave plasma treatment of silicone elastomer: Kinetic behavior and surface composition

2004 ◽  
Vol 91 (6) ◽  
pp. 4098-4104 ◽  
Author(s):  
Björn Olander ◽  
Anders Wirsén ◽  
Ann-Christine Albertsson
Keyword(s):  
Plasma Treatment ◽  
Microwave Plasma ◽  
Surface Composition ◽  
Silicone Elastomer ◽  
Kinetic Behavior

The effect of fluorine-based plasma treatment on morphology and chemical surface composition of biocompatible silicone elastomer

2006 ◽  
Vol 253 (3) ◽  
pp. 1506-1511 ◽  
Author(s):  
Dariusz Szmigiel ◽  
Krzysztof Domański ◽  
Piotr Prokaryn ◽  
Piotr Grabiec ◽  
Janusz W. Sobczak
Keyword(s):  
Plasma Treatment ◽  
Surface Composition ◽  
Silicone Elastomer ◽  
Chemical Surface

THE MODIFICATION OF PAPER INDUCED BY RADIO FREQUENCY AND MICROWAVE PLASMA TREATMENT

2007 ◽  
Vol 11 (4) ◽  
pp. 593-600
Author(s):  
V. V. Azharonok ◽  
I. I. Filatova ◽  
A. P. Dostanko ◽  
S. V. Bordusov ◽  
Yu. S. Shynkevich
Keyword(s):  
Radio Frequency ◽  
Plasma Treatment ◽  
Microwave Plasma

X-Ray Photoelectron-Spectroscopic Studies of Carbon Fiber Surfaces. Part IX: The Effect of Microwave Plasma Treatment on Carbon Fiber Surfaces

1989 ◽  
Vol 43 (7) ◽  
pp. 1153-1158 ◽  
Author(s):  
Yaoming Xie ◽  
Peter M. A. Sherwood
Keyword(s):  
Carbon Fiber ◽  
Plasma Treatment ◽  
Photoelectron Spectroscopy ◽  
Prolonged Exposure ◽  
Microwave Plasma ◽  
Spectroscopic Studies ◽  
X Ray ◽  
Fiber Damage ◽  
Surface Functionality ◽  
Fiber Treatment

X-ray photoelectron spectroscopy has been used to monitor the surface chemical changes occurring on type II carbon fibers exposed to air, oxygen, and nitrogen plasmas. In all cases the plasmas caused changes in surface functionality, in terms of both C-O and C-N functionality. Prolonged exposure to the plasmas caused loss of surface functionality for air and oxygen plasmas, and extended treatment caused fiber damage. Plasma treatment of fibers promises to be an effective method of fiber treatment.

Microwave plasma treatment of polymer surface for irreversible sealing of microfluidic devices

Lab on a Chip ◽  
2005 ◽  
Vol 5 (10) ◽  
pp. 1173 ◽  
Author(s):  
Alex Y. N. Hui ◽  
Gang Wang ◽  
Bingcheng Lin ◽  
Wing-Tat Chan
Keyword(s):  
Plasma Treatment ◽  
Microwave Plasma ◽  
Polymer Surface ◽  
Microfluidic Devices

scholarly journals High surface area nitrogen-functionalized Ni nanozymes for efficient peroxidase-like catalytic activity

PLoS ONE ◽  
2021 ◽  
Vol 16 (10) ◽  
pp. e0257777
Author(s):  
Anuja Tripathi ◽  
Kenneth D. Harris ◽  
Anastasia L. Elias
Keyword(s):  
Catalytic Activity ◽  
Plasma Treatment ◽  
Surface Composition ◽  
Point Of Care ◽  
High Surface ◽  
Effective Means ◽  
High Surface Area ◽  
Catalytic Performance ◽  
Optimal Time ◽  
Ammonia Plasma

Nitrogen-functionalization is an effective means of improving the catalytic performances of nanozymes. In the present work, plasma-assisted nitrogen modification of nanocolumnar Ni GLAD films was performed using an ammonia plasma, resulting in an improvement in the peroxidase-like catalytic performance of the porous, nanostructured Ni films. The plasma-treated nanozymes were characterized by TEM, SEM, XRD, and XPS, revealing a nitrogen-rich surface composition. Increased surface wettability was observed after ammonia plasma treatment, and the resulting nitrogen-functionalized Ni GLAD films presented dramatically enhanced peroxidase-like catalytic activity. The optimal time for plasma treatment was determined to be 120 s; when used to catalyze the oxidation of the colorimetric substrate TMB in the presence of H2O2, Ni films subjected to 120 s of plasma treatment yielded a much higher maximum reaction velocity (3.7⊆10−8 M/s vs. 2.3⊆10−8 M/s) and lower Michaelis-Menten coefficient (0.17 mM vs. 0.23 mM) than pristine Ni films with the same morphology. Additionally, we demonstrate the application of the nanozyme in a gravity-driven, continuous catalytic reaction device. Such a controllable plasma treatment strategy may open a new door toward surface-functionalized nanozymes with improved catalytic performance and potential applications in flow-driven point-of-care devices.

scholarly journals ADHESION OF PET/PSMA INTERFACES REINFORCED WITH PLASMA TREATMENT

2006 ◽  
Vol 13 (02n03) ◽  
pp. 265-271
Author(s):  
CHI-AN DAI ◽  
TAI-AN TSUI ◽  
YAO-YI CHENG
Keyword(s):  
Fracture Toughness ◽  
Plasma Treatment ◽  
Fracture Energy ◽  
Functional Groups ◽  
Surface Composition ◽  
Treatment Time ◽  
Bulk Material ◽  
Plasma Treatment Time ◽  
Pet Film ◽  
Pet Films

The interface between biaxially oriented poly (ethylene terephthalate) (PET) films and poly (styrene-co-maleic anhydride) (PSMA) was reinforced by nitrogen plasma treatment of PET film and subsequent annealing treatment of the PET/PSMA bi-material. The fracture toughness, Gc, of the interface was quantitatively measured using an asymmetric double cantilever beam test (ADCB). X-ray photoelectron spectrometry (XPS) was used to measure the change in the surface composition of PET films upon plasma treatment and correlate the fracture toughness of the interface. The fracture energy of PET/PSMA interface is significantly enhanced by annealing the plasma treated PET with PSMA at a temperature greater than the glass transition temperature of PSMA (~ 120°C). At an annealing temperature of 150°C, Gc increases with increasing plasma treatment time and reaches a plateau value of ~ 100–120 J/m2, a two order of magnitude increase in Gc compared with that of samples annealed at 130°C. The enhancement of the adhesion is resulted from the in-situ formation of copolymers due to reaction between amine functional groups from the plasma treatment and anhydride groups from PSMA. For plasma treatment time < 10 s, scanning electron microscope (SEM) measurement show that the fracture surface is relatively smooth indicating an interfacial failure between PET/PSMA. With increasing plasma treatment time and therefore increasing the amount of nitrogen functional groups on PET surface, large plastic deformation takes place at the PET/PSMA interface. For treatment time ≥ 100–150 s, the PET/PSMA interface becomes stronger than PET bulk material and consequently crack deviates from the interface and the failure occurs within the PET film. The interlayer fracture energy of a biaxially oriented PET film can thus be quantitatively measured with a Gc value of roughly 120 J/m2.

Studies on Microwave-Plasma Treatment of Froth Flotation Tailings

2020 ◽  
Vol 299 ◽  
pp. 1044-1051
Author(s):  
Almaz Kozhonov ◽  
Anvar Samsaliev ◽  
Yulia I. Toporkova
Keyword(s):  
Plasma Treatment ◽  
Microwave Plasma ◽  
Raw Materials ◽  
Froth Flotation ◽  
Molybdenum Sulfide ◽  
Gold Content ◽  
Efficient Technology ◽  
Plasma Exposure ◽  
Gold Extraction

An efficient technology is currently being searched for the processing of aged enrichment gold-containing tailings at the «Solton-Sary» enrichment plant, Kyrgyzstan. In this paper, the effect of microwave-plasma exposure on aged tailings and further gold extraction using froth flotation were investigated. Microwave-plasma treatment of the material was carried out in the presence of the following materials: charcoal, coal/quartz and molybdenum sulfide. Microwave-plasma treatment allowed to improve the quality of flotation concentrates in terms of the gold content from 130 ppm to 227 ppm. The design of plasmatron and methodology of plasma treatment were proposed. The results shown in this paper are valuable for mining organization in terms of searching for new industrial waste processing approaches and for broadening their raw materials base.

Amination of diamond film by ammonia microwave plasma treatment

2015 ◽  
Vol 54 ◽  
pp. 34-38 ◽  
Author(s):  
J.J. Wei ◽  
J.L. Liu ◽  
L.X. Chen ◽  
L.F. Hei ◽  
F.X. Lv ◽  
...  
Keyword(s):  
Plasma Treatment ◽  
Diamond Film ◽  
Microwave Plasma
Sign in / Sign up

Export Citation Format

Share Document