Dynamics of poly(vinyl methyl ketone) thin films studied by local dielectric spectroscopy

2017 ◽  
Vol 146 (20) ◽  
pp. 203315 ◽  
Author(s):  
R. Casalini ◽  
M. Labardi ◽  
C. M. Roland
Keyword(s):  
Thin Films ◽  
Dielectric Spectroscopy ◽  
Methyl Ketone ◽  
Vinyl Methyl

scholarly journals Effect of Environmental Humidity on the Ionic Transport of Poly(ethylene Oxide) Thin Films by Local Dielectric Spectroscopy

2019 ◽  
Author(s):  
Paul Markus ◽  
Daniel E Martínez-Tong ◽  
Georg Papastavrou ◽  
Angel Alegria
Keyword(s):  
Thin Films ◽  
Ethylene Oxide ◽  
Amorphous Phase ◽  
Dielectric Spectroscopy ◽  
Ionic Transport ◽  
Oxide Thin Films ◽  
Environmental Humidity ◽  
Dielectric Contrast ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

<div><div><div><p>The effect of humidity on the ionic transport in the amorphous phase of poly(ethylene oxide) thin films has been studied by via local dielectric spectroscopy. We explored a controlled humidity range between 15 %RH and 50 %RH. AFM-based local dielectric imaging allowed to obtain simultaneously the thin films topography and the corresponding dielectric contrast maps. No humidity effect on the film topography was observed whereas large variation of the dielectric signal could be detected. In addition, we observed a clear dielectric contrast in different locations on the thin film surface. At selected regions with high contrast in the dielectric maps, we performed nanoDielectric Spectroscopy (nDS) measurements covering the frequency range from 10 Hz to 100 kHz. By modeling these spectroscopy results, we quantified the conductivity of the amorphous phase of the semicrystalline poly(ethylene oxide) films. The crystalline fraction of the PEO thin films was extracted and found to be about 36%, independently of humidity. However, the average conductivity increased drastically from 2×10-10 to 5×10-9 S/cm, by changing environmental humidity in the explore %RH range.</p></div></div></div>

Grafting of sulfamethoxazole on acrylic acid−vinyl methyl ketone copolymer using the schiff base reaction−application as a drug delivery system

2018 ◽  
Vol 68 (5) ◽  
pp. 229-242
Author(s):  
Abdulaziz Ali Alghamdi ◽  
Abdulillah Al-Soulami ◽  
Wassem Sharaf Saeed ◽  
Abdel-Basit Al-Odayni ◽  
Abdelhabib Elsamlali ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Schiff Base ◽  
Acrylic Acid ◽  
Drug Delivery System ◽  
Delivery System ◽  
Methyl Ketone ◽  
Vinyl Methyl

scholarly journals Effect of environmental humidity on the ionic transport of poly(ethylene oxide) thin films, investigated by local dielectric spectroscopy

Soft Matter ◽  
2020 ◽  
Vol 16 (13) ◽  
pp. 3203-3208 ◽  
Author(s):  
Paul Markus ◽  
Daniel E. Martínez-Tong ◽  
Georg Papastavrou ◽  
Angel Alegria
Keyword(s):  
Thin Films ◽  
Relative Humidity ◽  
Ethylene Oxide ◽  
Dielectric Spectroscopy ◽  
Ionic Transport ◽  
Oxide Thin Films ◽  
Environmental Humidity ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

The laterally-resolved conductivity of PEO thin films increases with relative humidity, as determined by local dielectric spectroscopy: an AFM-based electrical technique.

scholarly journals Miscibility and Hydrogen Bonding in Blends of Poly(4-vinylphenol)/Poly(vinyl methyl ketone)

Polymers ◽  
2014 ◽  
Vol 6 (11) ◽  
pp. 2752-2763 ◽  
Author(s):  
Hana Bourara ◽  
Slimane Hadjout ◽  
Zitouni Benabdelghani ◽  
Agustin Etxeberria
Keyword(s):  
Hydrogen Bonding ◽  
Methyl Ketone ◽  
Vinyl Methyl

scholarly journals Electrochemical Preparation of Synergistic Nanoantimicrobials

Molecules ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 49 ◽  
Author(s):  
Maria Chiara Sportelli ◽  
Daniela Longano ◽  
Elisabetta Bonerba ◽  
Giuseppina Tantillo ◽  
Luisa Torsi ◽  
...  
Keyword(s):  
Bacterial Infections ◽  
Methyl Ketone ◽  
Composite Coatings ◽  
Antimicrobial Properties ◽  
Synergistic Action ◽  
Vinyl Methyl ◽  
Metal Core ◽  
Shell Nanoparticles ◽  
Electrochemical Preparation ◽  
Core Shell Nanoparticles

The rapid spreading of resistance among common bacterial pathogens towards the misused antibiotics/disinfectant agents has drawn much attention worldwide to bacterial infections. In light of this, the present work aimed at the realization of core–shell nanoparticles possessing remarkable antimicrobial properties thanks to the synergistic action of the metal core and the disinfectant shell. Copper nanoparticles stabilized by benzalkonium chloride were prepared, characterized, and implemented in poly-vinyl-methyl ketone to obtain nanoantimicrobial composite coatings. Bioactivity tests are reported, proving the excellent disinfectant properties of the proposed nanomaterials, as compared to one of the well-known and strongest silver-based nanoantimicrobials. Applications are also briefly described.

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