scholarly journals Adsorption Study of Dye Water Using Poly Vinyl Alcohol Coated Carbon Black as an Effective and Low Cost Adsorbent

2011 ◽  
Vol 3 (3) ◽  
Author(s):  
Poonam Gehlot ◽  
Kailash Daga ◽  
Rishika Mehta
Keyword(s):  
Carbon Black ◽  
Vinyl Alcohol ◽  
Low Cost ◽  
Poly Vinyl Alcohol ◽  
Adsorption Study ◽  
Coated Carbon

Nickel Nanoparticles Supported on Diphenylphosphinated Poly(Vinyl Alcohol-Co-ethylene) as a New Heterogeneous and Recyclable Catalyst for Mizoroki–Heck Reactions

2017 ◽  
Vol 41 (9) ◽  
pp. 541-546 ◽  
Author(s):  
Farzaneh Ebrahimzadeh
Keyword(s):  
Vinyl Alcohol ◽  
Nickel Nanoparticles ◽  
Supported Catalysts ◽  
Low Cost ◽  
Poly Vinyl Alcohol ◽  
X Ray Diffraction ◽  
Heck Reactions ◽  
Modified Polymer ◽  
Transmission Electron ◽  
High Metal

Nickel nanoparticles (NiNPs) supported on diphenylphosphinated poly(vinyl alcohol- co-ethylene) (DPP-PVA- co-PE) were synthesised by first reacting poly(vinyl alcohol- co-ethylene) with chlorodiphenylphosphine (ClPPh2) under basic conditions and then treating the product with Ni(OAc)2 followed by reduction with NaBH4. (DPP-PVA- co-PE)-NiNPs, a new metallised polymer, was then shown to efficiently catalyse Mizoroki–Heck reactions of aryl iodides, bromides or activated chlorides with olefins such as styrene and n-butyl acrylate in dimethylformamide. In contrast with other polymer-supported catalysts, the main advantage of this method is the low cost of the catalyst due to the simple synthetic route using easily obtained materials and good recoverability. Transmission electron microscopy and X-ray diffraction measurements were used to show the high metal dispersion and small sizes of Ni nanoparticle on the surface of the modified polymer. DPP-PVA- co-PE-NiNPs could be recycled several times.

Poly(vinyl alcohol)-Encapsulated Hydrophilic Carbon Black Nanoparticles Free from Aggregation

2003 ◽  
Vol 24 (12) ◽  
pp. 715-717 ◽  
Author(s):  
Han-Ying Li ◽  
Hong-Zheng Chen ◽  
Jing-Zhi Sun ◽  
Jian Cao ◽  
Zheng-Long Yang ◽  
...  
Keyword(s):  
Carbon Black ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Carbon Black Nanoparticles

scholarly journals Green Approach to the Synthesis of Poly(Vinyl Alcohol)-Silver Nanoparticles Hybrid Using Rice Husk Extract and Study of its Antibacterial Activity

2020 ◽  
Vol 10 (5) ◽  
pp. 6474-6480
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Green Synthesis ◽  
Rice Husk ◽  
Vinyl Alcohol ◽  
Low Cost ◽  
Agricultural Waste ◽  
Water Soluble ◽  
Poly Vinyl Alcohol ◽  
Green Approach

Green synthesis of silver nanoparticles (AgNPs) using rice husk (RH) as low-cost agricultural waste material has been gaining importance in recent years. Meanwhile, poly (vinyl alcohol) (PVA) is reported to involve in the green production of AgNPs as low-cost, water-soluble, biocompatible and biodegradable stabilizing polymer. The present study is focussed on the green synthesis of poly (vinyl alcohol) (PVA) - silver nanoparticles (PVA-AgNPs) hybrid using rice husk extract as a reducing agent. The results recorded from UV–vis spectrum and transmission electron microscopy (TEM) support the characterization of AgNPs produced. Synthesised PVA-AgNPs hybrid revealed effective antibacterial activity against Escherichia coli and Bacillus sp.

Preparation of chemical vapor sensing materials from composites of esterified poly(vinyl alcohol) and carbon black

2011 ◽  
Vol 156 (2) ◽  
pp. 961-968 ◽  
Author(s):  
Sarawut Sangngern ◽  
Somboon Sahasithiwat ◽  
Attaphon Kaewvilai ◽  
Nattamon Koonsaeng ◽  
Apirat Laobuthee
Keyword(s):  
Carbon Black ◽  
Vinyl Alcohol ◽  
Chemical Vapor ◽  
Poly Vinyl Alcohol ◽  
Vapor Sensing ◽  
Chemical Vapor Sensing

scholarly journals Enhanced Mechanical and Antibacterial Properties of Nanocomposites Based on Poly(vinyl Alcohol) and Biopolymer-Derived Reduced Graphene Oxide

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 615
Author(s):  
Beom-Gon Cho ◽  
Shalik Ram Joshi ◽  
Seongjin Lee ◽  
Shin-Kwan Kim ◽  
Young-Bin Park ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Vinyl Alcohol ◽  
Bacterial Colonization ◽  
Low Cost ◽  
Critical Concentration ◽  
Antibacterial Properties ◽  
Single Step ◽  
Poly Vinyl Alcohol ◽  
Reduced Graphene

Functionalized graphene–polymer nanocomposites have gained significant attention for their enhanced mechanical, thermal, and antibacterial properties, but the requirement of multi-step processes or hazardous reducing agents to functionalize graphene limits their current applications. Here, we present a single-step synthesis of thermally reduced graphene oxide (TrGO) based on shellac, which is a low-cost biopolymer that can be employed to produce poly(vinyl alcohol) (PVA)/TrGO nanocomposites (PVA–TrGO). The concentration of TrGO varied from 0.1 to 2.0 wt.%, and the critical concentration of homogeneous TrGO dispersion was observed to be 1.5 wt.%, below which strong interfacial molecular interactions between the TrGO and the PVA matrix resulted in improved thermal and mechanical properties. At 1.5 wt.% filler loading, the tensile strength and modulus of the PVA–TrGO nanocomposite were increased by 98.7% and 97.4%, respectively, while the storage modulus was increased by 69%. Furthermore, the nanocomposite was 96% more effective in preventing bacterial colonization relative to the neat PVA matrix. The present findings indicate that TrGO can be considered a promising material for potential applications in biomedical devices.

scholarly journals Innovations in Poly(Vinyl Alcohol) Derived Nanomaterials

2020 ◽  
Vol 20 (3) ◽  
pp. 5-22
Author(s):  
A. Kausar
Keyword(s):  
Vinyl Alcohol ◽  
Low Cost ◽  
Metal Nanoparticle ◽  
Poly Vinyl Alcohol ◽  
Thermoplastic Polymer ◽  
Research Fields ◽  
Mechanical And Electrical Properties ◽  
Heat Stable ◽  
Challenges And Opportunities ◽  
Potential Applications

AbstractPoly(vinyl alcohol) (PVA) has been considered as an important commercial synthetic thermoplastic polymer. PVA is a low cost, reasonably processable, optically transmitting, heat stable, and mechanically robust plastic. PVA-based nanomaterials usually comprise of the nanocomposites (PVA/graphene, PVA/carbon nanotube, PVA/nanodiamond, PVA/metal nanoparticle) and nanofibers. The structural, optical, mechanical, and electrical properties of the PVA-based nanomaterials have been enhanced with nanofiller addition or nanostructuring. This review offers fundamentals and advanced aspects of poly(vinyl alcohol) and the derived nanomaterials. It highlights recent advances in PVA nanocomposites and nanofibers for potential applications. The PVA-based nanomaterials have been successfully employed in fuel cells, sensors, batteries, membranes, electronics, and drug delivery relevances. The challenges and opportunities to strengthen the research fields of PVA-based nanomaterials have also been presented.

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