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<p>With the rapid popularization of electronic products and communication devices, the exploitation of electromagnetic interference (EMI) shielding composites has become extremely urgent to meet the requirements of electromagnetic protection. Herein, four kinds of MXene–carbon nanotubes/polylactic acid (MXene-CNTs/PLA) composites with 10&#xa0;wt.% CNTs and different&#xa0;MXene content, respectively, of 0, 0.5, 1.0, and 1.5&#xa0;wt.% were prepared by 3D printing technology. The results showed that MXene and CNTs were successfully introduced in PLA and they were uniformly distributed in PLA. Thermal decomposition temperature (<i>T</i><sub>2%</sub>) and maximum decomposition temperature (<i>T</i><sub>max</sub>) of all modified PLA decreased compared to pure PLA, while their residual carbon content increased significantly. The printed samples exhibited lightweight and excellent EMI shielding performances. Compared with the pure 3D-printed 10wt.% CNTs/PLA sample with an EMI shielding efficiency (EMI SE) with 3.43&#xa0;dB, the EMI SE of 1.0wt.%MXene–10wt.%CNTs/PLA could reach up to 39.37&#xa0;dB and its specific shielding effectiveness (<i>SSE</i><sub>t</sub>) was 176.63&#xa0;dB·cm<sup>2</sup>·g<sup>−1</sup>. Moreover, its tensile strength could reach 104.76&#xa0;MPa, significantly higher than that of pure PLA. The excellent EMI SE and mechanical performance endow 3D-printed PLA-related composite with great potential use in industry area.</p>

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3D-Printed Lightweight MXene-CNTs/Polylactic Acid Composite with Excellent Electromagnetic Interference Shielding and Mechanical Properties

  • 期刊论文

  • 发表日期：

    2026年7月16日

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  • Lin-lin Zhu,
  • Hong-mei Zuo,
  • Xiaoqi Jin,
  • Lidong Wen,
  • Zhong-bi Chen,
  • Song Fu

摘要

With the rapid popularization of electronic products and communication devices, the exploitation of electromagnetic interference (EMI) shielding composites has become extremely urgent to meet the requirements of electromagnetic protection. Herein, four kinds of MXene–carbon nanotubes/polylactic acid (MXene-CNTs/PLA) composites with 10 wt.% CNTs and different MXene content, respectively, of 0, 0.5, 1.0, and 1.5 wt.% were prepared by 3D printing technology. The results showed that MXene and CNTs were successfully introduced in PLA and they were uniformly distributed in PLA. Thermal decomposition temperature (T2%) and maximum decomposition temperature (Tmax) of all modified PLA decreased compared to pure PLA, while their residual carbon content increased significantly. The printed samples exhibited lightweight and excellent EMI shielding performances. Compared with the pure 3D-printed 10wt.% CNTs/PLA sample with an EMI shielding efficiency (EMI SE) with 3.43 dB, the EMI SE of 1.0wt.%MXene–10wt.%CNTs/PLA could reach up to 39.37 dB and its specific shielding effectiveness (SSEt) was 176.63 dB·cm2·g−1. Moreover, its tensile strength could reach 104.76 MPa, significantly higher than that of pure PLA. The excellent EMI SE and mechanical performance endow 3D-printed PLA-related composite with great potential use in industry area.