Effect of low-temperature plasma treatment and γ-irradiation on the surface properties of thin films based on polylactic acid

2020 ◽  
Vol 6 ◽  
pp. 40-55
Author(s):  
N.M. Ivanova ◽  
◽  
E.O. Filippova ◽  
A.N. Aleinik ◽  
V.F. Pichugin ◽  
...  
Keyword(s):  
Thin Films ◽  
Contact Angle ◽  
Low Temperature ◽  
Polylactic Acid ◽  
Surface Properties ◽  
Polar Component ◽  
Low Temperature Plasma ◽  
Plasma Exposure ◽  
Γ Irradiation ◽  
Temperature Plasma

Effects of the low-temperature plasma exposure, γ-irradiation, and joint g-irradiation and plasma exposure on the structure and surface properties of thin films based on polylactic acid (PLA) have been investigated. Films were obtained by the method a solvent-casting. It has been shown that films based on polylactic acid have topographically different sides: a smoother inner side and embossed outer one. PLA films have properties close to those hydrophobic, with a contact angle in the range of 70°-73° regardless of the surface side and belong to a weakly polar materials. The combined effect of plasma and gamma radiation slightly changes the surface topography. The effect of low-temperature plasma on the surface of the films leads to a decrease in the contact angle by 13°-55° (9-11%) and an increase in surface energy due to the polar component. The results of in vivo experiments on rabbits are presented. Biomicroscopy, optical coherence tomography, morphological and electron microscopic examination of the cornea after implantation of initial and radiation and plasma treated films showed that implantation of the films in the anterior chamber is not accompanied by a pronounced inflammatory reaction and increased intraocular pressure, while maintaining the morphological structure of the cornea almost unchanged.

Study on Polylactic Acid (PLA) Non-Woven Materials Were Treated by Low Temperature Plasma under Different Treatment Time

2011 ◽  
Vol 332-334 ◽  
pp. 485-488
Author(s):  
Ning Chen ◽  
Ya Bin Li
Keyword(s):  
Contact Angle ◽  
Low Temperature ◽  
Polylactic Acid ◽  
High Efficiency ◽  
Treatment Time ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Wetting Contact Angle ◽  
Internal Structures ◽  
Ft Ir

The study focused on novel surface modification technology: low temperature plasma, which is characterized by clean, high efficiency and energy-saving. Polylactic acid (PLA) non-woven materials were treated by this means under different treatment time. The SEM and FT-IR were used to observe the surface properties and internal structures of samples. Whether the wetting contact angle and the biodegradable property of materials were modified by low temperature plasma was discussed. The results indicated that with the increase of treatment time, the etching effect of plasma and some functional groups especial hydrophilic groups increased significantly. When they were only treated 3 minutes the wetting contact angle declined from 113.86° to 85.49°. Additionally, the hygroscopicity and biodegradability of materials were improved by low temperature plasma treatment.

scholarly journals Effect of Low-Temperature Plasma Nitriding on Corrosion and Surface Properties of Duplex Stainless Steel UNS S32205

2020 ◽  
Vol 29 (4) ◽  
pp. 2612-2622
Author(s):  
Yamid E. Núñez de la Rosa ◽  
Oriana Palma Calabokis ◽  
Paulo César Borges ◽  
Vladimir Ballesteros Ballesteros
Keyword(s):  
Stainless Steel ◽  
Low Temperature ◽  
Duplex Stainless Steel ◽  
Surface Properties ◽  
Plasma Nitriding ◽  
Low Temperature Plasma ◽  
Temperature Plasma

Influence of low-temperature plasma and γ radiation on the surface properties of PET track membranes

2016 ◽  
Vol 7 (5) ◽  
pp. 664-672 ◽  
Author(s):  
E. O. Filippova ◽  
D. A. Karpov ◽  
A. V. Gradoboev ◽  
V. V. Sokhoreva ◽  
V. F. Pichugin
Keyword(s):  
Low Temperature ◽  
Surface Properties ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Γ Radiation ◽  
Track Membranes

Low-Temperature Plasma Deposition of Diamond-Like Carbon and III Nitride Thin-Films for Photovoltaic Devices

2009 ◽  
Vol 610-613 ◽  
pp. 353-356
Author(s):  
Jin She Yuan ◽  
Ming Yue Wang ◽  
Guo Hao Yu
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Plasma Deposition ◽  
Diamond Like Carbon ◽  
Low Temperature Plasma ◽  
Photovoltaic Devices ◽  
Temperature Plasma ◽  
Force Microscopy ◽  
Atomic Force ◽  
Gan Film

Low-temperature plasma deposition of diamond-like carbon (DLC) and gallium nitride thin-films grown on Si substrate by PECVD was investigated using atomic force microscopy and reflectance spectra for photovoltaic devices application. It was found that the morphological features of the GaN film depend on the substrates under the optimum deposition conditions. The optical band gap of the films was approximately 5.5eV for PECVD DLC and approximately 3.3 eV for PECVD GaN.

Low Temperature Plasma Etching of Copper for Minimizing Size Effects in sub-100 nm Features

2006 ◽  
Vol 914 ◽  
Author(s):  
Nagraj S Kulkarni ◽  
Prabhakar Tamirisa ◽  
Galit Levitin ◽  
Richard J Kasica ◽  
Dennis W Hess
Keyword(s):  
Thin Films ◽  
Low Temperature ◽  
Plasma Etching ◽  
Size Effects ◽  
Copper Interconnects ◽  
Etching Process ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Potential Benefits ◽  
Key Features

AbstractA low temperature plasma etching process for patterning copper interconnects is proposed as a solution to the size effect issue in the resistivity of copper. Key features of this etching process based on a previous thermochemical analysis of the Cu-Cl-H system are discussed. Potential benefits of a subtractive etching scheme based on this process in comparison with the damascene scheme for copper-based interconnect processing in sub-100 nm features are presented in the context of the ITRS roadmap. Preliminary experimental work on plasma etching of Cu thin films using the proposed process is discussed.

Effect of Low-Temperature Plasma Treatment on Surface Properties of LDPE Film

2014 ◽  
Vol 1015 ◽  
pp. 303-307
Author(s):  
Jiang Yan Meng ◽  
Yun Ying Wang
Keyword(s):  
Contact Angle ◽  
Low Temperature ◽  
Plasma Treatment ◽  
Testing Machine ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Ldpe Film ◽  
Static Contact ◽  
Before And After ◽  
Surface Contact Angle

Low-density polyethylene (LDPE) film was treated by low-temperature plasma. Scanning electronic microscope, electronic universal testing machine, contact angle/interfacial tension measuring instrument were used to analyze the surface morphology, surface contact angle, bonding strength and performance of LDPE film before and after they were treated by low-temperature plasma. The results show that air ambience is more appropriate than N2, CO2 for treatment. Specifically, plasma treatment in air ambience, under conditions of 44 W (power), 30 s (duration) and 60 Pa (vacuum degree), can decline static contact angle of LDPE film from 101° to 13.5°. The transiency of plasma-treated LDPE film is so obvious that storage time of longer than one hour will result in a contact angle up to 74° and loss of plasma treatment effect (timeliness). Therefore, the reversible plasma-treated LDPE film should be processed immediately.

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