In situ and ex situ synthesis of poly(vinyl alcohol)–Fe3O4 nanocomposite flame retardants--颗粒学报PARTICUOLOGY

Ghanbari, D., Salavati-Niasari, M., & Ghasemi-Kooch, M. (2016). In situ and ex situ synthesis of poly(vinyl alcohol)–Fe3O4 nanocomposite flame retardants. Particuology, 26, 87-94. https://doi.org/10.1016/j.partic.2015.12.003

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

Davood Ghanbari ^a, Masoud Salavati-Niasari ^b *, Majid Ghasemi-Kooch ^b

a Young Researchers and Elite Club, Arak Branch, Islamic Azad University, Arak, Iran
b Institute of Nano Science and Nano Technology, University of Kashan, PO Box 87317-51167, Kashan, Iran

10.1016/j.partic.2015.12.003

Volume 26, June 2016, Pages 87-94

Received 3 April 2015, Revised 24 November 2015, Accepted 6 December 2015, Available online 16 February 2016, Version of Record 18 April 2016.

E-mail: salavati@kashanu.ac.ir

Highlights

• Fe₃O₄nanoparticles 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.

Abstract

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.

Graphical abstract

Keywords

Nanocomposite; Polymer; Magnetite; Precipitation; Thermal stability; Flame retardancy

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