Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (9): 20260122.doi: 10.7503/cjcu20260122

• Polymer Chemistry • Previous Articles     Next Articles

Fabrication of a Flame-retardant Cu-based Metal Organic Framework and Its Effect on Properties of Epoxy Resin

WAN Songtao1, CAO Zhilin1, WANG Zhengzhou1,2()   

  1. 1.Department of Polymeric Materials,School of Materials Science and Engineering
    2.Key Laboratory of Advanced Civil Engineering Materials,Ministry of Education,Tongji University,Shanghai 201804,China
  • Received:2026-03-21 Online:2026-09-10 Published:2026-05-28
  • Contact: WANG Zhengzhou E-mail:zwang@tongji.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21975185)

Abstract:

A copper-based metal-organic framework(Cu-MOF) with schiff base organic ligand 4,4'-[1,4-phenylenebis(methanylylidene)bis(nitrilo)]dibenzoic acid(TBPA) was first synthesized via ultrasound-assisted and hydrothermal methods. Then, a flame-retardant Cu-MOF derivative(Cu-MOF@DOPO) was prepared by reacting Cu-MOF with a reactive flame retardant 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide(DOPO). The Cu-MOF@DOPO was confirmed by multiple characterization techniques, including scanning electron microscopy(SEM), transmission electron microscopy(TEM), and X-ray diffraction(XRD). The effect of Cu-MOF@DOPO on flame retardant, mechanical and thermal properties of epoxy resin(EP) was investigated. The results indicated that EP containing 2%(mass fraction) Cu-MOF@DOPO(EP/2MD) had a limiting oxygen index(LOI) of 29.6% and achieved a UL-94 V-0 rating. Meanwhile, the peak heat release rate(pHRR) and total heat release(THR) of EP/2MD decreased by 14.2% and 8.1%, respectively, while the total smoke production(TSP) slightly deceased compared with those of pure EP. During combustion, Cu-MOF@DOPO in EP exerted its flame-retardant action both in the condensed phase and the gas phase. Compared with the EP composites filled with Cu-MOF or the flame-retardant ligand TBPA-DOPO, the EP/Cu-MOF@DOPO composites exhibited a higher glass transition temperature and enhanced mechanical properties.

Key words: Epoxy resin, Metal-organic framework, Flame retardancy, Mechanical property, Thermal property

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