Preparing Expandable Graphite from Biomass waste and its Application as Fire-Retardant Agent in Epoxy Resin

Document Type : Original Article

Authors

1 Cairo

2 Chemistry Department, Faculty of Science, Benha University, Benha, Egypt

3 Polymers and Pigments Department, National Research Center

Abstract

Expandable Graphite (EG) is functional filler for resins. Synthesized Expandable Graphite (EG) from Biomass waste (agriculture waste) by graphitizing carbonized Biomass waste undergoing severe oxidation conditions and then it is saturated with fire retardant agents like sodium borates and phosphoric acid. This paper describes the chemical properties of natural graphite and Expandable Graphite (EG) which is developed to be easily integrated and effectively dispersed into epoxy resin. Fire tests were carried out using wood specimens painted with polymers where specimens showed far extent in fire retarding. The addition of expandable graphite flake was found to increase the flame retardant effectiveness of epoxy resin systems. The use of graphite improved the physical characteristics of the char by increasing the amount of the insulating layer and reducing crack formation. The developed intumescent resin using expandable graphite as an additive showed markedly improved results for time to ignition, heat absorbed, mass loss, and flame spread. The smoke from burned resin/graphite system was reduced compared to that obtained from the intumescent resin alone

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History

  • Receive Date: 03 April 2023
  • Revise Date: 17 May 2023
  • Accept Date: 14 June 2023

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