物理化学学报 >> 2026, Vol. 42 >> Issue (10): 100281.doi: 10.1016/j.actphy.2026.100281

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聚多巴胺封装液态金属的Janus液态金属@MXene/Fe3O4纳米纤维膜:用于电磁干扰屏蔽与红外调控

方春月1,†, 谭晓璇1,†, 王春红1,3,8,*(), 何洋2,*(), 裴晓园1, 张钰1, Sarani binti Zakaria6, 伏广伟4, 王建刚5, 陈利8, 刘坤7, 徐婷7, 司传领7,*()   

  1. 1 天津工业大学纺织科学与工程学院, 天津 300387
    2 天津工业大学材料科学与工程学院, 分离膜材料先进技术国家重点实验室, 天津 300387
    3 天津工业大学绍兴柯桥研究院, 浙江 绍兴 312030
    4 中国纺织工程学会, 北京 100025
    5 绍兴市质量技术监督检测院, 浙江 绍兴 312366
    6 UKM-YSD Chair for Sustainability, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia 43600, Selangor, Malaysia
    7 天津科技大学生物基纤维材料全国重点实验室, 天津市制浆造纸重点实验室, 中国轻工业造纸与生物质精炼重点实验室, 天津 300457
    8 天津工业大学先进纺织复合材料学科交叉中心, 天津 300387
  • 收稿日期:2026-02-02 修回日期:2026-03-05 录用日期:2026-03-05 发布日期:2026-09-03
  • 通讯作者: Email: wangchunhong@tiangong.edu.cn (王春红)heyang@tiangong.edu.cn (何洋)sichli@tust.edu.cn (司传领)
  • 作者简介:

    †这些作者对本工作做出了同等贡献

Janus liquid metal@Mxene/Fe3O4 nanofiber membranes with polydopamine-confined liquid metal for electromagnetic interference shielding and infrared control

Chunyue Fang1, Xiaoxuan Tan1, Chunhong Wang1,3,8,*(), Yang He2,*(), Xiaoyuan Pei1, Yu Zhang1, Sarani binti Zakaria6, Guangwei Fu4, Jiangang Wang5, Li Chen8, Kun Liu7, Ting Xu7, Chuanling Si7,*()   

  1. 1 School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
    2 State Key Laboratory of Advanced Separation Membrane Materials, School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China
    3 Shaoxing Keqiao Institute of Tiangong University, Shaoxing 312030, Zhejiang Province, China
    4 China Textile Engineering Society, Beijing 100025, China
    5 Shaoxing Testing Institute of Quality Technical Supervision, Shaoxing 312366, Zhejiang Province, China
    6 UKM-YSD Chair for Sustainability, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia 43600, Selangor, Malaysia
    7 State Key Laboratory of Bio-based Fiber Materials, Tianjin Key Laboratory of Pulp and Paper, China Light Industry Key Laboratory of Papermaking and Biorefinery, Tianjin University of Science and Technology, Tianjin 300457, China
    8 Interdisciplinary Research Center for Advanced Textile Composites, Tiangong University, Tianjin 300387, China
  • Received:2026-02-02 Revised:2026-03-05 Accepted:2026-03-05 Published:2026-09-03
  • Contact: Email: wangchunhong@tiangong.edu.cn (Chunhong Wang)heyang@tiangong.edu.cn (Yang He)sichli@tust.edu.cn (Chunwen Sun)

摘要:

电磁干扰(EMI)日益制约着柔性多功能电子材料的发展,但非对称结构设计与功能集成仍存在局限。本文报道了一种Janus层级膜材料——液态金属@聚多巴胺-MXene/Fe3O4@纤维素聚丙烯腈纳米纤维(LM@PDA-MXene/Fe3O4@CPNF),通过静电纺丝制备Fe3O4掺杂的纤维素/聚丙烯腈纳米纤维支架,并采用真空辅助组装法构筑插层有核壳结构LM@PDA纳米颗粒的MXene层制得。该多尺度结构耦合了三种损耗机制:MXene渗流网络实现导电损耗,LM@PDA间隔物抑制堆叠并形成微电容器引发界面与偶极极化,多孔磁性入口改善阻抗匹配。在X波段,70 μm单层膜的平均电磁屏蔽效能(SET)达45.1 dB,厚度归一化比屏蔽效能(SSE/t)达8.87 × 103 dB cm2 g−1;四层堆叠后SET提升至70.8 dB。该膜还具有取向依赖性热功能,这种超薄、环保、轻质膜在单一平台集成了吸收主导型EMI屏蔽与双向热管理功能,为下一代可穿戴电子设备的电磁防护与红外调控提供了实用化路径。

关键词: 电磁干扰屏蔽, 磁性纳米纤维, MXene, 结构调控, 多功能性

Abstract:

Electromagnetic interference (EMI) increasingly constrains the development of flexible and multifunctional electronics materials, yet asymmetric structural design and functional integration remain limited. Here we report a Janus hierarchical membrane, liquid metal@polydopamine-MXene/Fe3O4@cellulose polyacrylonitrile nanofibers (LM@PDA-MXene/Fe3O4@CPNF), fabricated by electrospinning a Fe3O4-doped cellulose/Polyacrylonitrile nanofiber scaffold and vacuum-assisted assembly of MXene intercalated with core–shell LM@PDA nanoparticles. The multiscale architecture couples three loss pathways: a percolated MXene network for conductive loss, LM@PDA spacers that suppress restacking and form microcapacitors for interfacial and dipolar polarization, and a porous magnetic entrance that improves impedance matching. In the X-band, a single 70 μm layer achieved an average EMI shielding effectiveness (SET) of 45.1 dB and a thickness-normalised specific shielding effectiveness (SSE/t) = 8.87 × 103 dB·cm2 g−1, stacking four layers raised SET to 70.8 dB. The membrane also provided orientation-dependent thermal functions, this ultrathin, eco-friendly, and lightweight membrane integrates absorption-dominant EMI shielding with bidirectional thermal management in a single platform, offering a practical route toward electromagnetic protection and infrared control in next-generation wearable electronics.

Key words: Electromagnetic interference shielding, Magnetic nanofiber, MXene, Structure regulation, Multifunctional