In situ and ex situ synthesis of poly(vinyl alcohol)–Fe3O4 nanocomposite flame retardants

•Fe3O4 nanoparticles were synthesized via a simple precipitation reaction.•The effect of acrylamide on the morphology of the products was investigated.•Fe3O4 nanoparticles could improve thermal stability and flame retardancy of the PVA matrix. Application of flame retardants is limited because of en...

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Bibliographic Details
Published in:Particuology 2016-06, Vol.26, p.87-94
Main Authors: Ghanbari, Davood, Salavati-Niasari, Masoud, Ghasemi-Kooch, Majid
Format: Article
Language:English
Subjects:
Flame retardancy
Magnetite
Nanocomposite
Polymer
Precipitation
Thermal stability
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Summary:•Fe3O4 nanoparticles were synthesized via a simple precipitation reaction.•The effect of acrylamide on the morphology of the products was investigated.•Fe3O4 nanoparticles could improve thermal stability and flame retardancy of the PVA matrix. Application of flame retardants is limited because of environmental requirements. This work introduces conventional magnetic nanoparticles as a new class of nontoxic and effective flame retardant. Fe3O4 enhanced both the thermal stability and flame retardant properties of a poly(vinyl alcohol) matrix. Nanoparticles were synthesized via a simple precipitation reaction without using an inert atmosphere at room temperature. The effects of different precursors and acrylamide on the morphology of the products were investigated. Nanoparticles exhibited a ferrimagnetic behavior at room temperature. To prepare the magnetic nanocomposite, Fe3O4 nanoparticles were added to the poly(vinyl alcohol). In the presence of a flame, the magnetic nanoparticles remained together, showed resistance to dripping and protected the polymer matrix. Dispersed nanoparticles play a role of a magnetic barrier layer, which slows product volatilization and prevents flames and oxygen from reaching the sample during decomposition of the polymer.
ISSN:1674-2001
2210-4291
DOI:10.1016/j.partic.2015.12.003