3D Printing of Nacre-Inspired Structures with Exceptional Mechanical and Flame-Retardant Properties  

作　　者：Yang Yang Ziyu Wang Qingqing He Xiangjia Li Gengxi Lu Laiming Jjiang Yushun Zeng Brandon Bethers Jie Jin Shuang Lin Siqi Xiao Yizhen Zhu Xianke Wu Wenwu Xu Qiming Wang Yong Chen 

机构地区：[1]Department of Mechanical Engincering.San Diego State University,5500 Campanie Drive,Sar Diego,CA 92182.USA [2]The Institute of Techrrological Sciences,Wuhan University,Wuhan 430072,China [3]School,for Enginering of Matter,Transport and Energy,Arizona State Universiy,551 E Tyler Mall,Tempe.AZ 85281,USA [4]Department of Biomedical Engincering,University of Southern alifrnia,1042 Downey Way,Los Angeles,CA 90089,USA [5]Epstein Department of Indusria and Systems Engineering University of Southern Califomnia,3715 McClinock Ave,Los Angeles,CA 90089,USA [6]ShadeCraft Robotics Inc.Pasadena,CA 91105,USA [7]Department of Chemical Engineering and Materials Science,University of Southen Calfornian,925 Bloom Walk,Los Angeles,Califormia 90089,USA [8]Deparment of Aerospace and Mechanical Engineering,University of Southern California,Los Angeles,CA 9008%.USA 9School of Physics and Technology,Wuhan Universily,Wuhan 430072,China [9]School of Physics and Technology,Wuhan University,Wuhan 430072,China [10]Sonny Aslani Department of Civil and Enwiromental Engineering,University of Southern California,Los Angeles,CA 90089,USA

出　　处：《Research》2022年第2期191-202,共12页研究（英文）

基　　金：supported by the National Science Foundation(NSF)(Grant Nos.CMMi 1663663,CMMI 1151191,CMMI 2113727,and CMMI 2114119);Q.W._acknowledges the funding support from Air Force Ofice of Scientific Research(FA9550-18-1-0192);National Science Foundation(CMMI-1943598).

摘　　要：Flame-retardant and thermal management structures have attracted great attention duc to the requirement of high-temperature exposure in industrial,aerospace,and thermal power fields,but the development of protoctive fire-retardant structures with complex shapes to fit arbitrary surfaces is still challenging.Herein,we reported a rotation-blade casting-assisted 3D printing process to fabricate nacre-inspired structures with exceptional mechanical and flame-retardant properties,and the relatedi fundamental mechanisms are studied.3-(Trimethoxysilyl)propyl methacrylate(TMSPMA)modified boron nitride nanoplatelets(BNs)were aligned by rotation-blade casting during the 3D printing process to build the"hrick and mortar"architecture.The 3D printed structures are more lightweight,while having higher fracture toughness than the natural nacre,which is attributed to the crack deflection,aligned BN(a-BNs)bridging,and pull-outs reinforced structures by the covalent bonding between TMSPMA grafted a-BNs and polymer matrix.Thermal conductivity is enhanced by 25.5 times compared with pure polymer and 5.8 times of anisotropy due to the interconnection of a-BNs.3D printed heat-exchange structures with vertically aligned BNs in complex shapes were demonstrated for efficient thermal control of high-power light-emitting diocles.3D printed helmet and armor with a-BNs show exceptional mechanical and fire-retardant properties,demonstrating integrated mechanical and thermal protection.

关 键 词：TOUGHNESS exceptional BLADE 

分 类 号：TQ314[化学工程—高聚物工业]