Development of metal hydroxide nanoparticles from eggshell waste and seawater and their application as flame retardants for ethylene-vinyl acetate copolymer (EVA)

Int J Biol Macromol. 2019 May 1:128:994-1001. doi: 10.1016/j.ijbiomac.2019.02.065. Epub 2019 Feb 12.

Abstract

Recently, calcium hydroxide and magnesium hydroxide nanoparticles have attracted a lot of research interest in different sectors: food, packaging, health, automotive construction and food application. In the present study, we report development of bio-material calcium hydroxide nanoparticles (Ceg-Ca(OH)2), obtained from chicken eggshell collected from the food industries as well as magnesium hydroxide nanoparticles obtained from seawater (Seaw-Mg(OH)2). The flame-retardant behavior of Ethylene-Vinyl Acetate copolymer (EVA) containing different blends of Ceg-Ca(OH)2 and Seaw-Mg(OH)2 nanoparticles has been evaluated using cone calorimeter. Our results showed the interest of combining both nanoparticles. In fact, the partial substitution of small Seaw-Mg(OH)2 content (10 wt%) by Ceg-Ca(OH)2 enables further reduction of pHRR from 251 to 206 kW/m2 without any reduction of the composite time to ignition (52 s). Furthermore, the partial substitution of 40 wt% Seaw-Mg(OH)2 nanoparticles by Ceg-Ca(OH)2 enables high flame retardant effect as well as the generation of cohesive residue.

Keywords: Eggshell-biomaterial; Fire properties; Thermal stability.

MeSH terms

  • Animals
  • Calcium Hydroxide / chemistry*
  • Egg Shell / chemistry
  • Flame Retardants*
  • Magnesium Hydroxide / chemistry*
  • Materials Testing
  • Nanoparticles / chemistry*
  • Polyvinyls / chemistry*
  • Seawater / chemistry*
  • Temperature
  • Waste Products*

Substances

  • Flame Retardants
  • Polyvinyls
  • Waste Products
  • ethylenevinylacetate copolymer
  • Magnesium Hydroxide
  • Calcium Hydroxide