4.6 Article

Layer-by-layerassembled bagasse to enhance the fire safety of epoxy resin: A renewable environmental friendly flame retardant

期刊

JOURNAL OF APPLIED POLYMER SCIENCE
卷 138, 期 11, 页码 -

出版社

WILEY
DOI: 10.1002/app.50032

关键词

composites; flame retardance; resins; thermal properties

资金

  1. National Natural Science Foundation of China [21436006]

向作者/读者索取更多资源

A environmentally friendly flame retardant was prepared by layer-by-layer assembly method, significantly improving the fire performance of epoxy resin composites; Cone calorimetry test showed a significant reduction in peak heat release rate and total heat release after the addition of the flame retardant compared to untreated bagasse; Combining with expandable graphite further enhanced the flame retardant effect of the composites.
In an effort to make rational use of resources, wasted bagasse were collected, and then fabricated by layer-by-layer (LbL) assembly to prepare an environmentally benign flame retardant for epoxy resin (EP). Six chitosan/ammonum polyphosphate bilayers were successfully deposited on the surface of bagasse, which endows EP/6BL@BF composites with a limiting oxygen index value of 24.1% and V-1 rating in UL-94 test. Compared with untreated bagasse, cone calorimetry test reveals that the incorporation of6BL@BF reduces the peak heat release rate and total heat release by 64.6% and 13.2%, respectively. Besides, expandable graphite (EG) was combined with6BL@BF to further enhance the fire safety and thermal stability of EP composites. Furthermore, the gas and condensed phase analysis of EP/6BL@BF/EG-3 composite was investigated by TG-IR, scanning electronic microscopy, Laser Raman spectroscopy, and X-ray photoelectron spectroscopy, and the flame retardant mechanism of6BL@BF/EG was proposed. Finally, the mechanical properties of EP composites were investigated systematically.

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