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Chemistry and Industry of Forest Products ›› 2022, Vol. 42 ›› Issue (1): 71-78.doi: 10.3969/j.issn.0253-2417.2022.01.010

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Preparation and Performance of Bio-based Intrinsic Flame-retarding Epoxy Resin

Zheng PAN, Zhuo LI, Caiying BO, Guodong FENG, Xiaohui YANG, Lihong HU()   

  1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing 210042, China
  • Received:2020-12-08 Online:2022-02-28 Published:2022-03-11
  • Contact: Lihong HU E-mail:zhlh000907@sina.com


The epoxy monomer 1, 3, 3'-tri-oxirane-2'-methoxy-benzophenone(DEBP) was synthesized with vanillic acid, m-diphenol, epichlorohydrin and so on as raw materials by simple two-step method. And DEBP was structurally characterized and determined via FT-IR, and was then mixed with 4, 4'-diaminodiphenylsulfone(DDS), followed by heating and curing to obtain DEBP/DDS epoxy resin. For comparative purpose, commercially used diglycidyl ether of bisphenol A(DGEBA) was cured with the identical curing agent was used as a control. The results showed that DEBP monomer had higher curing activity than that of DGEBA monomer. The glass transition temperature of DEBP/DDS epoxy resin was 183℃, which was higher than that of DGEBA/DDS. The DEBP/DDS epoxy resin outperformed DGEBA/DDS epoxy resin in terms of flexural and tensile properties. The flexural modulus and strength of DEBP/DDS epoxy resin were measured as 2 437.8 and 98.6 MPa and the tensile modulus and strength of DEBP/DDS were 2 523.4 and 71.1 MPa. The cured DEBP/DDS also demonstrated excellent flame retardant property. The char residue at 800℃ reached 35%, the limiting oxygen index(LOI) was 34%, the UL 94 level was V-0 and the total heat release was measured as 17.8 kJ/g. This research suggested that without indroducing any flame retardant element, an intrinsic flame-retarding epoxy resin was synthesized with bio materials.

Key words: biomaterials, epoxy resin, intrinsic flame retardance, benzophenone

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