Anomalous electrical properties of poly vinyl alcohol films with Tb3+ ions and copper nanoparticles in different solvents

RSC Advances ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 1648-1654 ◽  
Author(s):  
Brijesh Kumar ◽  
Gagandeep Kaur ◽  
Prabhakar Singh ◽  
S. B. Rai
Keyword(s):  
Laser Ablation ◽  
Electrical Properties ◽  
Copper Nanoparticles ◽  
Nd:Yag Laser ◽  
Vinyl Alcohol ◽  
Sodium Lauryl Sulphate ◽  
Poly Vinyl Alcohol

Laser ablation was used to fabricate copper nanoparticles (NPs) in different solvents viz. sodium lauryl sulphate, acetone and ethanol by applying 1064 nm radiation from a Nd:YAG laser.

scholarly journals Modified Silica Nanofibers with Antibacterial Activity

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Ivana Veverková ◽  
Irena Lovětinská-Šlamborová
Keyword(s):  
Antibacterial Activity ◽  
Copper Nanoparticles ◽  
Vinyl Alcohol ◽  
Wound Dressing ◽  
Process Time ◽  
Poly Vinyl Alcohol ◽  
Modified Silica ◽  
Antibacterial Efficiency ◽  
Silica Nanofibers ◽  
Adsorbed Silver

This study is focused on development of functionalized inorganic-organic nanofibrous material with antibacterial activity for wound dressing applications. The nanofibers combining poly(vinyl alcohol) and silica were produced by electrospinning from the sol and thermally stabilized. The PVA/silica nanofibers surface was functionalized by silver and copper nanoparticles to ensure antibacterial activity. It was proven that quantity of adsorbed silver and copper nanoparticles depends on process time of adsorption. According to antibacterial tests results, this novel nanofibrous material shows a big potential for wound dressing applications due to its significant antibacterial efficiency.

Effect of vanadium pentoxide on the mechanical, thermal, and electrical properties of poly(vinyl alcohol)/vanadium pentoxide nanocomposites

2011 ◽  
Vol 121 (5) ◽  
pp. 2870-2876 ◽  
Author(s):  
Sirirat Wacharawichanant ◽  
Nareerut Wutanasiri ◽  
Paveena Srifong ◽  
Usarat Meesangpan ◽  
Supakanok Thongyai
Keyword(s):  
Electrical Properties ◽  
Vanadium Pentoxide ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Thermal And Electrical Properties

scholarly journals Enhancing High-Frequency Dielectric Properties of Beta-SiC Filled Nanocomposites from Synergy between Percolation and Polarization

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1699 ◽  
Author(s):  
Cheng Peng ◽  
Yefeng Feng ◽  
Jianbing Hu
Keyword(s):  
Electrical Properties ◽  
Polyvinyl Chloride ◽  
High Frequency ◽  
Vinyl Alcohol ◽  
Large Scale ◽  
Breakdown Strength ◽  
Induced Polarization ◽  
Poly Vinyl Alcohol ◽  
Scale Production ◽  
High Permittivity

Promising comprehensive properties, including high permittivity, low dielectric loss, high breakdown strength, low electrical conductivity, and high thermal conductivity, are very hard to simultaneously obtain in high-frequency applicable polymer nanocomposite dielectrics. Instead of traditional electric percolation, in this work, a novel route based on a synergy between electric percolation and induced polarization has been raised to prepare 0–3 type nanocomposites with an enhanced high permittivity (high-k) property and low loss at high frequency. This work aimed at optimizing that synergy to achieve the favorable properties mentioned above in composite dielectrics used at high frequencies such as 1 MHz and 1 GHz. Conductive beta-SiC nanoparticles with a particle size of ~30 nm were employed as filler and both insulating poly(vinyl alcohol) and polyvinyl chloride were employed as polymer matrices to construct two composite systems. Utilizing polyvinyl chloride rather than poly(vinyl alcohol) realizes higher comprehensive electrical properties in composites, ascribed to optimization of that synergy. The optimization was achieved based on a combination of mild induced polarization and polarization-assisted electric percolation. Therefore, this work might open the way for large-scale production of high-frequency applicable composite dielectrics with competitive comprehensive electrical properties.

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