材料科学
阻燃剂
复合材料
3D打印
聚合物
韧性
甲基丙烯酸酯
共聚物
作者
Yang Yang,Ziyu Wang,Qingqing He,Xiangjia Li,Guoxing Lu,Laiming Jiang,Yushun Zeng,Brandon Bethers,Jie Jin,Shuang Lin,Siqi Xiao,Yizhen Zhu,Xianke Wu,Wenwu Xu,Qiming Wang,Yong Chen
出处
期刊:Research
[AAAS00]
日期:2022-01-01
卷期号:2022
被引量:18
标识
DOI:10.34133/2022/9840574
摘要
Flame-retardant and thermal management structures have attracted great attention due to the requirement of high-temperature exposure in industrial, aerospace, and thermal power fields, but the development of protective 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 related 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 “brick 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 diodes. 3D printed helmet and armor with a-BNs show exceptional mechanical and fire-retardant properties, demonstrating integrated mechanical and thermal protection.
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