Engineering phosphorus-containing lignin for epoxy biocomposites with enhanced thermal stability,fire retardancy and mechanical properties  

作　　者：Anlin Zhang Jianzhong Zhang Lina Liu Jinfeng Dai Xinyu Lu Siqi Huo Min Hong Xiaohuan Liu Mark Lynch Xuesen Zeng Paulomi Burey Pingan Song 

机构地区：[1]College of Chemistry and Materials Science,Zhejiang A&F University,Hangzhou 311300,China [2]Centre for Future Materials,University of Southern Queensland,Springfield,QLD 4300,Australia [3]College of Life Science,Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation,Taizhou University,Taizhou 318000,China [4]School of Agriculture and Environmental Science,University of Southern Queensland,Springfield,QLD 4300,Australia

出　　处：《Journal of Materials Science & Technology》2023年第36期82-93,共12页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51873196 and 51903222);the Australian Research Council(Nos.LP220100278,DP190102992 and FT190100188);the Natural Science Foundation of Zhejiang Province(No.LY21E030001);the“Pioneer”and“Leading Goose”R&D Program of Zhejiang(No.2022C03128).

摘　　要：Fabricating a high-performing thermoset using bio-based flame retardant is critical for the sustain-able development of engineering materials with superior fire safety and robust mechanical properties.Herein,the epoxy(EP)composites with the industrial requirements are manufactured with a novel high-efficient,lignin-based flame retardant named DAL-x,which is fabricated by grafting 9,10-dihydro-9-oxa-10-phosphaze-10-oxide(DOPO)onto lignin.The resulting DAL-x/EP composite exhibits excellent flame retardancy with a desirable UL-94 V-0 rating and a satisfactory limiting oxygen index(LOI)of 29.8%due to the appropriate phosphorus content of DAL-x with adjustable molecular chain structure.More-over,the DAL-x/EP composite shows an unexpected improvement in the elastic modulus(∼36%)and well-preserved strength and ductility compared with those of pure EP.This work offers a feasible strat-egy for creating efficient bio-based flame retardants utilizing industrial waste lignin and preparing high-performance EP composites that meet the demanding requirement of fire retardancy in industries,con-tributing to the circular economy and sustainability.

关 键 词：Epoxy resin LIGNIN Flame retardancy Thermal stability Mechanical property 

分 类 号：TG146.411[一般工业技术—材料科学与工程] TB383.1[金属学及工艺—金属材料]