Issue 33, 2021
From the journal:

RSC Advances

Preparation and characterization of polydopamine/melamine microencapsulated red phosphorus and its flame retardance in epoxy resin

Chen Cheng,a   Yanling Lu,a   Weining Ma,a   Shaojie Li,a   Jun Yan*b  and  Shiguo Du ORCID logo *a  

* Corresponding authors

a Army Engineering University of PLA-Shijiazhuang Campus, Shijiazhuang, Hebei, P. R. China
E-mail: shiguoduaeu@163.com

b Hebei Jiaotong Vocational and Technical College, Shijiazhuang, Hebei, P. R. China
E-mail: yan-junjun@263.net

Abstract

Polydopamine/melamine composite microencapsulated red phosphorus (RP@PDA/MA) was prepared and applied as the flame retardant for epoxy resin (EP) in this work. For comparison, polydopamine (PDA) coated red phosphorus (RP@PDA) was also prepared. The microstructure, chemical composition and thermal decomposition of the as prepared samples were systematically characterized. The results showed that PDA and PDA/MA shell structures were fabricated successfully via convenient water-based processes at room temperature. The flame retardance of red phosphorus (RP), RP@PDA, and RP@PDA/MA on EP was evaluated. The results showed that EP blending with 7 wt% RP@PDA/MA passed V-0 degree in the vertical burning test (UL-94), reached a limited oxygen index (LOI) of 30.9% and decreased the peak heat release rate of EP by 65.1% in the cone calorimeter test. The satisfactory flame retardance can be attributed to the intumescent flame retardant system consisting of RP@PDA/MA. The PDA and PDA/MA shell structures also improved the compatibility between RP and EP, thus RP@PDA and RP@PDA/MA had less significant impact on the tensile–strain properties of EP.

Graphical abstract: Preparation and characterization of polydopamine/melamine microencapsulated red phosphorus and its flame retardance in epoxy resin

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Article information

DOI
https://doi.org/10.1039/D1RA03164C
Article type
Paper
Submitted
23 Apr 2021
Accepted
02 Jun 2021
First published
07 Jun 2021
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2021,11, 20391-20402

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Preparation and characterization of polydopamine/melamine microencapsulated red phosphorus and its flame retardance in epoxy resin

C. Cheng, Y. Lu, W. Ma, S. Li, J. Yan and S. Du, RSC Adv., 2021, 11, 20391 DOI: 10.1039/D1RA03164C

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