4D printing shape memory PLA/Co/CNTOH composites with adaptive microwave absorption for reconfigurable metastructures

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-07-09 DOI:10.1016/j.compositesb.2025.112798

Ximing Zhang , Shennan Guo , Guoke Wei , Hang Zhang , Xingyu Hao , Shujuan Tan , Kui Liu , Guangbin Ji

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Abstract

Self-adaptive microwave stealth materials are crucial to meet the evolving demands of military applications. In this work, a PLA/Co/CNTOH filament was developed by incorporating hydroxyl-functionalized carbon nanotubes (CNT-OH) and Co into a polylactic acid (PLA) matrix. PLA/Co/CNTOH exhibits shape memory properties and microwave absorption performance. The reflection loss (RL) of PLA/Co/CNTOH-3 % filament reached −21.3 dB at 10.08 GHz with a thickness of 2.5 mm. In addition, the effective absorption bandwidth (EAB) was 3.24 GHz (8.6–11.84 GHz). Then, a foldable honeycomb structure was further designed to demonstrate the practical potential in achieving adaptive microwave absorption. Simulation results revealed that the EAB and the position of the RL_min peak exhibited directional shifts with changes in the folding angle, which indicates that the microwave absorption performance modulated through structural deformation. This work demonstrates the potential of shape memory materials for the adaptive microwave absorption systems.

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具有可重构元结构的自适应微波吸收的4D打印形状记忆PLA/Co/CNTOH复合材料

自适应微波隐身材料对于满足军事应用不断发展的需求至关重要。在这项工作中，通过将羟基功能化碳纳米管（CNT-OH）和Co掺入聚乳酸（PLA）基质中，制备了PLA/Co/CNTOH长丝。PLA/Co/CNTOH具有形状记忆性能和微波吸收性能。PLA/Co/ cntoh - 3%长丝在10.08 GHz时的反射损耗（RL）达到- 21.3 dB，厚度为2.5 mm。有效吸收带宽（EAB）为3.24 GHz （8.6 ~ 11.84 GHz）。然后，进一步设计了可折叠蜂窝结构，以证明实现自适应微波吸收的实际潜力。仿真结果表明，随着折叠角度的变化，EAB和RLmin峰的位置发生方向性变化，表明结构变形对微波吸收性能进行了调制。这项工作证明了形状记忆材料在自适应微波吸收系统中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.