scholarly journals Preparation and characterization of PEG-assisted growth of colloidal Ag nanoparticles

2017 ◽  
Vol 3 (6) ◽  
pp. 65
Author(s):  
Elalyaa M. A. Mohamed ◽  
Wael H. Eisa ◽  
T. A. Abdel-Baset ◽  
S. Mahrous
Keyword(s):  
Silver Nanoparticles ◽  
Ethylene Glycol ◽  
Ag Nanoparticles ◽  
Poly Ethylene Glycol ◽  
Peg 400 ◽  
Green Route ◽  
Uv Visible ◽  
Poly Ethylene ◽  
Transmission Microscope

Colloidal Silver nanoparticles were prepared under mild conditions using poly(ethylene glycol) (PEG) in the presence of PVA as surfactant. Ethylene glycol was used as a reducing agent for the preparation of metal particles at room temperature. Ag+1can be smoothly reduced to silver nanoparticles at ambient condition in PEG 400. UV-visible studies demonstrated that the reducing rate of Ag+1to nano-Ag was remarkably enhanced with the increased amount of the PEG. The transmission microscope images prove that the reduced Ag nanoparticles were spherical in shape. The pathway described here was considered as a green route for preparation of silver nanoparticles.

Synthesis of Fluorescent Magnetic and Plasmonic-Hybrid Multifunctional Nanopaticles

2014 ◽  
Vol 1081 ◽  
pp. 161-164
Author(s):  
Xue Mei Li ◽  
Zheng Guan ◽  
Hong Ling Liu ◽  
Jun Hua Wu ◽  
Xian Hong Wang ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Zno Nanoparticles ◽  
Poly Ethylene Glycol ◽  
Visible Absorption ◽  
Transmission Electron ◽  
Good Magnetic Property ◽  
Uv Visible ◽  
Poly Ethylene ◽  
Poly Propylene

FeAu/ZnO nanoparticles were successfully synthesized by nanoemulsion process with the use of poly (ethylene glycol)-block-poly (propylene glycol)-block-poly (ethylene glycol) as the surfactant. The characterization of the FeAu/ZnO nanoparticles was performed using X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and UV-visible absorption spectroscopy, showing that the polymer-laced nanoparticles reveal high crystallinity, excellent dispersibility and well defined optical performance. The process of solvent dispersion-collection of FeAu/ZnO nanoparticles indicates that the nanoparticles possess good magnetic property for applications.

scholarly journals Application of Stabilized Silver Nanoparticles as Thin Films as Corrosion Inhibitors for Carbon Steel Alloy in 1 M Hydrochloric Acid

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Ayman M. Atta ◽  
Hamad A. Allohedan ◽  
Gamal A. El-Mahdy ◽  
Abdel-Rahman O. Ezzat
Keyword(s):  
Silver Nanoparticles ◽  
Carbon Steel ◽  
Ethylene Glycol ◽  
Ag Nanoparticles ◽  
Electrochemical Impedance ◽  
Vinyl Pyrrolidone ◽  
Poly Ethylene Glycol ◽  
Corrosive Media ◽  
Self Assembled ◽  
Poly Ethylene

Nanometer scaled materials have attracted tremendous interest as corrosion protective films due to their high ability to form self-assembled films on the metal surfaces. It is well known that the silver nanoparticles have higher reactivity towards aqueous acidic solution. The present work aims to prepare coated silver nanoparticles to protect carbon steel alloys from aqueous acidic corrosive media. In this respect, Ag nanoparticles colloid solutions were produced through reducing AgNO3separately with trisodium citrate in an aqueous solution or in the presence of stabilizer such as poly(ethylene glycol) thiol and poly(vinyl pyrrolidone). The morphology of the modified silver nanoparticles was investigated by TEM and DLS. UV-Vis absorption spectrum was used to study the effect of HCl on the stability of the dispersed silver nanoparticles. The corrosion inhibition efficiency of the poly (ethylene glycol)thiol, the self-assembled monolayers of Ag nanoparticles, was determined by polarization method and electrochemical impedance spectroscopy (EIS). Polarization curves indicated that the coated silver poly (ethylene glycol)thiol acted as a mixed type inhibitor. The data of inhibition efficiencies obtained measured by polarization measurements are in good agreement with those obtained with electrochemical impedance.

“Green synthesis” of benzothiazepine library of indeno analogues and their in vitro antimicrobial activity

2014 ◽  
Vol 68 (5) ◽  
Author(s):  
Ashok Acharya ◽  
Rahul Kamble ◽  
Snehalkumar Patil ◽  
Shrikant Hese ◽  
Omprakash Yemul ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Acetic Acid ◽  
Ethylene Glycol ◽  
Bleaching Earth ◽  
Poly Ethylene Glycol ◽  
Unsaturated Ketones ◽  
Peg 400 ◽  
Green Route ◽  
Poly Ethylene

AbstractA novel series of indeno-benzothiazepine derivatives was synthesised via a “green” route. Synthesis of these compounds involves the treatment of dinucleophiles such as 2-aminobenzenethiols with α,β-unsaturated ketones in poly(oxyethylene) (poly(ethylene glycol), PEG-400) catalysed by acetic acid. The synthone α,β-unsaturated ketones were obtained by Claisen-Schmidt condensation of indan-1-one with substituted pyrazole-2-carbaldehydes prompted by bleaching earth (pH 12.5) as catalyst and PEG-400 as “green” reaction solvent. Screening of all the synthesised compounds for antimicrobial activity revealed that most of these compounds exhibited moderate to significant antimicrobial activity.

Preparation and characterization of poly (ethylene glycol) grafted Ca-alginate fibers by γ-irradiation for biomedical applications

2013 ◽  
Vol 27 (2) ◽  
pp. 216-226 ◽  
Author(s):  
Md. Kamal Khan ◽  
Mohammed Mizanur Rahman ◽  
Bodrun Nesa ◽  
Romana Nasrin ◽  
Swajal Molla ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Biomedical Applications ◽  
Poly Ethylene Glycol ◽  
Γ Irradiation ◽  
Alginate Fibers ◽  
Poly Ethylene ◽  
Ca Alginate

AB2 Y-shaped miktoarm star conductive polyaniline-modified poly(ethylene glycol) and its electrospun nanofiber blend with poly(ε-caprolactone)

RSC Advances ◽  
2015 ◽  
Vol 5 (46) ◽  
pp. 36715-36726 ◽  
Author(s):  
Bakhshali Massoumi ◽  
Somayeh Davtalab ◽  
Mehdi Jaymand ◽  
Ali Akbar Entezami
Keyword(s):  
Ethylene Glycol ◽  
Electrospun Nanofibers ◽  
Synthesis And Characterization ◽  
Electrospun Nanofiber ◽  
Poly Ethylene Glycol ◽  
Conductive Polyaniline ◽  
Miktoarm Star ◽  
Poly Ethylene ◽  
Type Ab

The aim of this study is the synthesis, and characterization of novel type AB2 Y-shaped miktoarm star conductive polyaniline-modified poly(ethylene glycol), and preparation of its electrospun nanofibers blend with poly(ε-caprolactone).

Sign in / Sign up

Export Citation Format

Share Document