Comparative study of surface free energy and surface resistivity of polypropylene and polystyrene thin films after DC plasma treatment

Polimery ◽  
2007 ◽  
Vol 52 (05) ◽  
pp. 336-339 ◽  
Author(s):  
RAJESH KUMAR
Keyword(s):  
Thin Films ◽  
Free Energy ◽  
Comparative Study ◽  
Plasma Treatment ◽  
Surface Free Energy ◽  
Surface Resistivity ◽  
Dc Plasma

Effect of temperature on the surface free energy and acid–base properties of Gabapentin and Pregabalin drugs − a comparative study

RSC Advances ◽  
2015 ◽  
Vol 5 (60) ◽  
pp. 48712-48719 ◽  
Author(s):  
S. Ramanaiah ◽  
Vikram Karde ◽  
P. Venkateswarlu ◽  
Chinmay Ghoroi
Keyword(s):  
Free Energy ◽  
Surface Energy ◽  
Comparative Study ◽  
Surface Free Energy ◽  
Effect Of Temperature ◽  
Temperature Dependent ◽  
Acid Base ◽  
Base Properties

Temperature dependent surface energy variations observed in Gabapentin and Pregabalin drugs.

Surface Free Energy Modification of PET by Plasma Treatment—Influence on Adhesion

1993 ◽  
Vol 42 (4) ◽  
pp. 249-254 ◽  
Author(s):  
R. Cueff ◽  
G. Baud ◽  
J. P. Besse ◽  
M. Jacquet ◽  
M. Benmalek
Keyword(s):  
Free Energy ◽  
Plasma Treatment ◽  
Surface Free Energy

Thickness dependent wetting properties and surface free energy of HfO2 thin films

2016 ◽  
Vol 108 (23) ◽  
pp. 231602 ◽  
Author(s):  
Sergei Zenkin ◽  
Alexandr Belosludtsev ◽  
Šimon Kos ◽  
Radomír Čerstvý ◽  
Stanislav Haviar ◽  
...  
Keyword(s):  
Thin Films ◽  
Free Energy ◽  
Surface Free Energy ◽  
Wetting Properties

scholarly journals Effect of Argon Plasma on Root Dentin after Use of 6% NaOCl

2016 ◽  
Vol 27 (1) ◽  
pp. 41-45 ◽  
Author(s):  
Maíra do Prado ◽  
Rafael Nigri Roizenblit ◽  
Laura Villela Pacheco ◽  
Carlos Augusto de Melo Barbosa ◽  
Carolina Oliveira de Lima ◽  
...  
Keyword(s):  
Free Energy ◽  
Plasma Treatment ◽  
Surface Free Energy ◽  
Argon Plasma ◽  
Control Group ◽  
Ftir Analysis ◽  
Root Canal Sealer ◽  
Dentin Surface ◽  
Ah Plus ◽  
Root Dentin

Abstract The aim of this study was to evaluate the effect of argon plasma on dentin surface after use of 6% NaOCl. Sixty bovine incisors had their crowns removed, the roots split, and the segments planed. One hundred twenty segments of the cervical third were used. The samples were divided in two groups (n=60): Control group: immersed in 6% NaOCl, washed, dried and then immersed in 17% EDTA, washed and dried and Argon group: after treatment described for the Control group, non-thermal argon plasma was applied for 30 s. Ten samples were evaluated by scanning electron microscopy in each group. Other ten samples were analyzed by Fourier transform infrared spectroscopy (FTIR). Thirty samples were analyzed with a goniometer to measure the contact angle between the dentin surfaces and solutions, to determine the surface free energy. The last ten samples were used to evaluate the wettability of AH Plus sealer. Data were statistically analyzed using Kruskal Wallis and Mann-Whitney tests (p<0.05). The results of this study showed that argon plasma did not modify the surface topography. FTIR analysis showed chemical modifications after plasma treatment. Argon plasma increased the surface free energy of dentin and AH Plus wettability. In conclusion, argon plasma treatment modified chemically the dentin surface. This treatment increased the surface free energy and wettability of an epoxy resin root canal sealer, favoring its bonding to dentin surfaces.

scholarly journals Influence of Low-Pressure RF Plasma Treatment on Aramid Yarns Properties

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3476
Author(s):  
Alicja Nejman ◽  
Irena Kamińska ◽  
Izabela Jasińska ◽  
Grzegorz Celichowski ◽  
Małgorzata Cieślak
Keyword(s):  
Weight Loss ◽  
Free Energy ◽  
Radio Frequency ◽  
Plasma Treatment ◽  
Surface Free Energy ◽  
Low Pressure ◽  
Rf Plasma ◽  
Polar Component ◽  
Specific Strength ◽  
Dispersion Component

The aim of the study was to modify the surface free energy (SFE) of meta- (mAr) and para-aramid (pAr) yarns by their activation in low-pressure air radio frequency (RF) (40 kHz) plasma and assessment of its impact on the properties of the yarns. After 10 and 90 min of activation, the SFE value increased, respectively, by 14% and 37% for mAr, and by 10% and 37% for pAr. The value of the polar component increased, respectively by 22% and 57% for mAr and 20% and 62% for pAr. The value of the dispersion component for mAr and pAr increased respectively by 9% and 25%. The weight loss decreased from 49% to 46% for mAr and 62% to 50% for pAr after 90 min of activation. After 90 min, the specific strength for mAr did not change and for pAr it decreased by 40%. For both yarns, the 10 min activation in plasma is sufficient to prepare their surface for planned nanomodification.

Plasma treatment of heat treated beech wood – investigation on surface free energy

Holzforschung ◽  
2008 ◽  
Vol 62 (4) ◽  
Author(s):  
Arndt Wolkenhauer ◽  
Georg Avramidis ◽  
Holger Militz ◽  
Wolfgang Viöl
Keyword(s):  
Free Energy ◽  
Plasma Treatment ◽  
Surface Free Energy ◽  
Beech Wood ◽  
Heat Treated
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