A facile method for electrospinning of Ag nanoparticles/poly (vinyl alcohol)/carboxymethyl-chitosan nanofibers

2012 ◽  
Vol 258 (22) ◽  
pp. 8867-8873 ◽  
Author(s):  
Yinghui Zhao ◽  
Ying Zhou ◽  
Xiaomian Wu ◽  
Lu Wang ◽  
Ling Xu ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Vinyl Alcohol ◽  
Carboxymethyl Chitosan ◽  
Poly Vinyl Alcohol

scholarly journals In Situ Preparation and Properties of Poly(vinyl alcohol)/Carboxymethyl Chitosan/Cyanidin Hydrogel Films

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Xiaojuan Zhang ◽  
Wenbin Cai ◽  
Lingyun Hao ◽  
Wei Zhang
Keyword(s):  
Vinyl Alcohol ◽  
Encapsulation Efficiency ◽  
Umbilical Vein ◽  
Antibacterial Activities ◽  
Carboxymethyl Chitosan ◽  
Poly Vinyl Alcohol ◽  
In Situ Preparation ◽  
Umbilical Vein Endothelial Cells ◽  
Hydrogel Films

This study synthesized poly(vinyl alcohol)/carboxymethyl chitosan/cyanidin (PVA/CMCS/CY) hydrogel films. First, PVA and CMCS were used to synthesize hydrogel films by ultraviolet irradiation. Meanwhile, CY was in situ combined into the hydrogel films through the electrostatic attraction between CMCS and CY. Next, the products were analyzed using Fourier-transform infrared spectroscopy, scanning electron microscopy, contact angle test, swelling analysis, and mechanical property test. The results revealed that compared with PVA/CMCS hydrogel films, the PVA/CMCS/CY hydrogel films had an interporous structure and good swelling and mechanical properties. Moreover, the drug release experiments demonstrated that the PVA/CMCS/CY hydrogel films had a CY encapsulation efficiency of 33.5% with a sustained CY release of up to 60 h. Furthermore, the examined antibacterial activities against Staphylococcus aureus and Escherichia coli showed that the porous PVA/CMCS/CY hydrogel films exhibited a certain inhibition. Cell viability experiments demonstrated that the PVA/CMCS/CY films displayed no obvious cytotoxicity to human umbilical vein endothelial cells.

Correlating SAXS analysis with LSPR behavior: poly(vinyl alcohol)-stabilized Ag nanoparticles

2011 ◽  
Vol 13 (9) ◽  
pp. 4387-4394 ◽  
Author(s):  
Manjeet Singh ◽  
I. Sinha ◽  
A. K. Singh ◽  
R. K. Mandal
Keyword(s):  
Ag Nanoparticles ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Saxs Analysis

Tuning of refractive index of poly(vinyl alcohol): Effect of embedding Cu and Ag nanoparticles

2013 ◽  
Vol 113 (7) ◽  
pp. 073103 ◽  
Author(s):  
Suman Mahendia ◽  
Anil Kumar Tomar ◽  
Parveen K. Goyal ◽  
Shyam Kumar
Keyword(s):  
Refractive Index ◽  
Ag Nanoparticles ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Alcohol Effect

scholarly journals Dielectric Relaxation Behavior of Silver Nanoparticles and Graphene Oxide Embedded Poly(vinyl alcohol) Nanocomposite Film: An Effect of Ionic Liquid and Temperature

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 374 ◽  
Author(s):  
Ganeswar Sahu ◽  
Mamata Das ◽  
Mithilesh Yadav ◽  
Bibhu Prasad Sahoo ◽  
Jasaswini Tripathy
Keyword(s):  
Electron Microscopy ◽  
Ionic Liquid ◽  
Graphene Oxide ◽  
Dielectric Permittivity ◽  
Dielectric Relaxation ◽  
Ag Nanoparticles ◽  
Vinyl Alcohol ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol ◽  
Dielectric Relaxation Behavior

This paper presents the dielectric characteristics of nanocomposite films of poly(vinyl alcohol) (PVA) embedded with silver (Ag) nanoparticles and graphene oxide(GO). The nanocomposite films were fabricated by using the solvent casting approach. The morphological analysis was carried out through scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The dielectric relaxation behavior of nanocomposite films was analyzed in the frequency range of 101 to 106 Hz, by varying GO loading. The temperature effect was investigated over the temperature range of 40 to 150 °C. The effect of ionic liquid (IL) was also explored by comparing the dielectric behavior of films fabricated without using ionic liquid. The conductive filler loading variation showed a significant effect on dielectric permittivity(ε′), complex impedance (Z*) and electric conductivity (σac). The obtained results revealed that the dielectric permittivity (ε′) increased by incorporating Ag nanoparticles and increasing GO loading in PVA matrix. An incremental trend in dielectric permittivity was observed on increasing the temperature, which is attributed to tunneling and hopping mechanism. With an increase in nanofiller loading, the real part of impedance (Z′) and imaginary part of impedance (Z″) were found to decrease. Further, the semicircular nature of Nyquist plot indicated the decrease in bulk resistivity on increasing GO loading, temperature and incorporating ionic liquid. On the basis of above findings, the obtained GO-Ag-PVA nanocomposite films can find promising applications in charge storage devices.

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