Tunable thermal, flame retardant and toxic effluent suppression properties of polystyrene based on alternating graphitic carbon nitride and multi-walled carbon nanotubes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Yongqian Shi
  • Ze Long
  • Keqing Zhou
  • Zhou Gui
  • Yuan Hu

Detail(s)

Original languageEnglish
Pages (from-to)17064-17073
Journal / PublicationJournal of Materials Chemistry A
Volume3
Issue number33
Online published10 Jul 2015
Publication statusPublished - 7 Sep 2015

Abstract

Significant improvements in thermal and flame retardant properties of polymeric materials at low loadings hold tremendous promise for fire safety materials. In the present work, a highly effective graphitic carbon nitride/acidized multi-walled carbon nanotube (g-C3N4/aMWCNT) bilayer was deposited on a PS sphere for reducing its fire hazards. The PS sphere allowed the intimate assembly of the g-C3N4/aMWCNT bilayer on its surface through electrostatic interactions. Structural and morphological characterization revealed the successful assembly of PS/g-C3N4/aMWCNT systems. Enhanced thermal stability and flame retardancy (e.g. a decrease of ca. 45% and 47% in HRR and THR, respectively) were obtained for the ternary assembled systems instead of the binary materials. The phenomena were caused by two reasons: g-C3N4/aMWCNT bilayers induced the construction of the "tortuous path" which impeded the permeation of heat and the escape of pyrolysis volatile products; on the other hand, stacked g-C3N4 nanosheets or thermolabile aMWCNTs with an uncompact network structure led to poor thermal stability and fire resistance. Thus, this work paves a potential pathway to design efficient assembled fire-retardant systems for fire safety.

Citation Format(s)

Tunable thermal, flame retardant and toxic effluent suppression properties of polystyrene based on alternating graphitic carbon nitride and multi-walled carbon nanotubes. / Shi, Yongqian; Long, Ze; Yu, Bin; Zhou, Keqing; Gui, Zhou; Yuen, Richard K. K.; Hu, Yuan.

In: Journal of Materials Chemistry A, Vol. 3, No. 33, 07.09.2015, p. 17064-17073.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review