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Fabrication of flame retardant benzoxazine semi-biocomposites reinforced by ramie fabrics with bio-based flame retardant coating
作者:Yan HQ, Li NN, Cheng J, Song PA, Fang ZP*, Wang H
关键字:Ramie fabric; Self-assembly; Benzoxazineresin; Mechanical property; Flame retardancy; Bio-composites
论文来源:期刊
具体来源:Polymer Composites, 2018.5, 39: E480-E488
发表时间:2018年
Natural fibers reinforcedbenzoxazinebio-composites are one class of highly attractive engineering materials in automobile, train and aerospace fields because of high thermal stability,good mechanical and improved biodegradabilityproperties. Unfortunately, their poor interface and flammabilityissues remain unsatisfactorily addressed to date.Herein, we have demonstrated the fabrication of benzoxazine semi-biocompositesreinforcedby ramie fabric which was coatedwith bio-basedpoly(diphenolic acid-phenyl phosphate) (poly(DPA-PDCP)) and polyethylenimine (PEI) via layer-by-layer self-assembly method.The results show that thepresence of poly(DPA-PDCP)/PEI coatingcan significantly improve the interfacial adhesion between fabric and the resin matrix. Thisenablesthe tensile strength and flexural strength of as-prepared semi-biocompositeto increase by 53 % (68.7 MPa) and 113 % (120 MPa), respectively. In addition,the resultant semi-biocompositeshowssuperior flame retardancy with a V-0 ratingachieved in the UL-94 test. This work offers an effective approach to fabricate strong and flame retardant benzoxazinesemi-biocomposites.