Poly(vinyl alcohol) as a water protecting agent for silver nanoparticles: the role of polymer size and structure

2017 ◽  
Vol 19 (13) ◽  
pp. 8742-8756 ◽  
Author(s):  
Alexander Kyrychenko ◽  
Dmitry A. Pasko ◽  
Oleg N. Kalugin
Keyword(s):  
Silver Nanoparticles ◽  
Vinyl Alcohol ◽  
Md Simulation ◽  
Poly Vinyl Alcohol ◽  
Atomistic Model ◽  
Single Chain ◽  
Polymer Size ◽  
Size And Structure

In the present work, an atomistic model for the classical MD simulation of silver nanoparticles grafted with single-chain PVA of various lengths from 220 up to 1540 repeating units was developed.

scholarly journals The Design, Characterization and Antibacterial Activity of Heat and Silver Crosslinked Poly(Vinyl Alcohol) Hydrogel Forming Dressings Containing Silver Nanoparticles

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 96
Author(s):  
John Jackson ◽  
Helen Burt ◽  
Dirk Lange ◽  
In Whang ◽  
Robin Evans ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Silver Nitrate ◽  
Vinyl Alcohol ◽  
Unmet Need ◽  
Chemical Characterization ◽  
Wound Dressings ◽  
Poly Vinyl Alcohol ◽  
Burn Wound

The prompt treatment of burn wounds is essential but can be challenging in remote parts of Africa, where burns from open fires are a constant hazard for children and suitable medical care may be far away. Consequently, there is an unmet need for an economical burn wound dressing with a sustained antimicrobial activity that might be manufactured locally at low cost. This study describes and characterizes the novel preparation of a silver nitrate-loaded/poly(vinyl alcohol) (PVA) film. Using controlled heating cycles, films may be crosslinked with in situ silver nanoparticle production using only a low heat oven and little technical expertise. Our research demonstrated that heat-curing of PVA/silver nitrate films converted the silver to nanoparticles. These films swelled in water to form a robust, wound-compatible hydrogel which exhibited controlled release of the antibacterial silver nanoparticles. An optimal formulation was obtained using 5% (w/w) silver nitrate in PVA membrane films that had been heated at 140 °C for 90 min. Physical and chemical characterization of such films was complemented by in vitro studies that confirmed the effective antibacterial activity of the released silver nanoparticles against both gram positive and negative bacteria. Overall, these findings provide economical and simple methods to manufacture stable, hydrogel forming wound dressings that release antibiotic silver over prolonged periods suitable for emergency use in remote locations.

Effect of silver-nanoparticles generated in poly (vinyl alcohol) membranes on ethanol dehydration via pervaporation

2019 ◽  
Vol 27 (7) ◽  
pp. 1595-1607 ◽  
Author(s):  
Asmaa Selim ◽  
Andras Jozsef Toth ◽  
Daniel Fozer ◽  
Eniko Haaz ◽  
Nóra Valentínyi ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Ethanol Dehydration

Role of boric acid in the formation of poly(vinyl alcohol)–iodine complexes in undrawn films

Polymer ◽  
2010 ◽  
Vol 51 (3) ◽  
pp. 687-693 ◽  
Author(s):  
Kumiko Ohishi ◽  
Toshiaki Itadani ◽  
Tetsushi Hayashi ◽  
Toshio Nakai ◽  
Fumitaka Horii
Keyword(s):  
Boric Acid ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Iodine Complexes

The role of electrostatic repulsion in the gelation of poly(vinyl alcohol)/borax aqueous solutions

Soft Matter ◽  
2018 ◽  
Vol 14 (32) ◽  
pp. 6767-6773 ◽  
Author(s):  
Jingjing Li ◽  
Zhijie Zhang ◽  
Xiao Cao ◽  
Yonggang Liu ◽  
Quan Chen
Keyword(s):  
Aqueous Solutions ◽  
Vinyl Alcohol ◽  
Linear Viscoelasticity ◽  
Poly Vinyl Alcohol ◽  
Electrostatic Repulsion

This study examined linear viscoelasticity of semidilute non-entangled poly(vinyl alcohol) (PVA) and borax aqueous solutions: one borax molecule dissociates into two B(OH)3 molecules and two B(OH)4− ions, and the latter can crosslink the PVA chains.

Role of Poly(vinyl alcohol) in the Crystal Growth of Ammonium Perchlorate

2008 ◽  
Vol 8 (3) ◽  
pp. 1060-1066 ◽  
Author(s):  
Anuj A. Vargeese ◽  
Satyawati. S. Joshi ◽  
V. N. Krishnamurthy
Keyword(s):  
Crystal Growth ◽  
Ammonium Perchlorate ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol

Nanocomposite films based on chitosan–poly(vinyl alcohol) and silver nanoparticles with high antibacterial and antioxidant activities

2017 ◽  
Vol 111 ◽  
pp. 112-121 ◽  
Author(s):  
Sawssen Hajji ◽  
Rabeb Ben Slama-Ben Salem ◽  
Marwa Hamdi ◽  
Kemel Jellouli ◽  
Wajdi Ayadi ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Vinyl Alcohol ◽  
Antioxidant Activities ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol
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