The Investigation of the Nano-Clay Effects on Thermal Behavior and Ignition Resistance of the Phenolic-Carbon Nanocomposite

Document Type : Solid Mechanics

Authors

1 Aerospace Engineering Department, Science and Research Branch,Islamic Azad University

2 Aerospace Engineering Department, khajeNasir University

Abstract

The layered silicates (clay) are being extensively used to improve the thermal properties of polymer-based composites, because of their nano structure. In this study, the modified Montmorillonite-based nano-clay with 2.5 and 7.5 weight percentages were distributed by a melt-mixing method in a phenolic matrix and a poly acrylonitrile-based carbon cloth was used as the reinforcement. The composite was prepared by a manual layout method and cured in an autoclave at 160 °C for 4 hours and the effects of nano-clay loading with 2.5 and 7.5 weight percentages on the crystalline structure and the thermal and mechanical properties of the carbon-polymer-layered silicate nanocomposites were investigated. The silicate galleries spacing of the layered silicate platelets were determined from XRD patterns. The dispersion of the clay layers in the resin was analyzed by TEM studies. The cone calorimetric tests were used to evaluate the flame- retardancy properties of the nanocomposites and the effects of tensile strength and short beam strength were investigated. The results showed that the d-spacing of nanocomposites is doubled due to 2.5 wt. % nano-clay loading. Also, the heat release rate (HRR) is decreased up to 36% by adding the layered silicates. The tensile strength and shear strength of nanocomposites are not influenced considerably by adding the nano-clay.

Keywords

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History

  • Receive Date: 24 December 2020
  • Revise Date: 08 January 2021
  • Accept Date: 18 December 2021
  • Publish Date: 23 October 2021

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