3D printing nanocomposites with enhanced mechanical property and excellent electromagnetic wave absorption capability via the introduction of ZIF-derivative modified carbon fibers. (15th March 2022)

• Record Type: Journal Article
• Authors: Wu, Tianyu; Huan, Xianhua; Jia, Xiaolong; Sui, Gang; Wu, Lingyun; Cai, Qing; Yang, Xiaoping
• Is Part Of: Composites. Number 233(2022)
• Publication Date: 2022-03-15
• Subjects: Electromagnetic wave absorption -- 3D printing -- Fuse deposition modeling -- Metal-organic framework; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2022.109658
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: Through in-situ synthesis and thermal annealing, ZIF-derived nanoarrays were introduced to the surface of carbon fibers. The resulting modified carbon fibers (CoNC@CF) with the hierarchical nanostructure showed excellent electromagnetic wave (EMW) absorption capabilities, and were applied to 3D printing technology with polylactic acid (PLA) as the matrix. The CoNC@CF-PLA composites exhibited favorable 3D printability in comprehensive analysis, permitting the nanocomposite to be formed into complex structure as model designed. With the conduction loss, interface and dipole polarization and magnetic loss provided by CoNC@CF, the nanocomposites containing 10 wt% CoNC@CF displayed superior electromagnetic wave absorption capability. The minimum reflection loss value reached −45.5 dB at 11.5 GHz with a thickness of 2.9 mm. The introduction of CoNC@CF enhanced the mechanical properties of 3D printing PLA parts. After 30 s of microwave processing, the tensile strength of 3D printing PLA nanocomposites can be further enhanced. The CoNC@CF simultaneously improved the microwave absorption and mechanical properties of 3D printing nanocomposites parts. Thus, it provided a new efficient approach for preparation of structure-designable nanocomposites with integration of desired mechanical and electromagnetic wave absorption properties through 3D printing technology. Graphical abstract: Image 1 Highlights: The ZIF derivatives (CoNC) endued carbon fiber excellent EMW absorption capacity. The CoNC@CF-PLA nanocomposites exhibited favorable 3D printability. The RLmin value of 3D printed 10%CoNC@CF-PLA parts reached −45.5 dB. The introduction of CoNC@CF enhanced the mechanical properties of 3D printed parts. Microwave processing further improved the interface bonding of the nanocomposite parts.