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High EMI shielding effectiveness and superhydrophobic properties based on step-wise asymmetric structure constructed by one-step method

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Abstract

It is of significance to prepare biodegradable electromagnetic interference (EMI) shielding materials with high EMI shielding effectiveness (SE) in order to solve electromagnetic and environmental pollution problems. In this paper, environmentally friendly EMI shielding silver nanowires (AgNWs)/poly(L-lactic acid) (PLLA)/poly(D-lactic acid) (PDLA)/ferroferric oxide (Fe3O4) composites with step-wise asymmetric structures were prepared by a facile one-step non-solvent-induced phase separation method. The conductive AgNW network was constructed at a low mass fraction of 5 wt.% on the surface of stereo-complexed crystalline poly(lactic acid) (SC-PLA) film (1.08 × 104 S/m). Moreover, magnetic Fe3O4 is mainly distributed in the skeleton of porous SC-PLA film. Due to the synergistic effect of AgNWs and Fe3O4, the EMI SE of SC-PLA films reaches up to 50.3 dB. Interestingly, SC-PLA film modified with triethoxy-1H,1H,2H,2H-tridecafluoro-n-octylsilane (TTO) demonstrates an outstanding water contact angle of about 150.2° compared with the pure PLLA film (134.7°), stemming from the synergistic effect of denser SC-PLA nano-protrusions and low-surface-energy TTO. Thus, we successfully fabricated the high EMI shielding SC-PLA film with wonderful superhydrophobicity, which extends the application performance and service life of portable electronics in moist environments.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 52263003 and 51963003) and the Guizhou Provincial Science and Technology Projects (Nos. [2020]1Z044 and ZK[2022]Maj019).

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Authors and Affiliations

  1. Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China

    Kang Yan, Changmei Wu, Lan Xie, Lingjun Zeng, Yi Jiang, Zhiqiang Jiang, Guojun Chang & Bai Xue

  2. State Key Laboratory of Public Big Data, Guizhou University, Guiyang, 550025, China

    Kang Yan, Changmei Wu, Lan Xie, Lingjun Zeng, Yi Jiang, Zhiqiang Jiang, Guojun Chang & Bai Xue

  3. National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang, 550014, China

    Lan Xie & Bai Xue

  4. National and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane Processes, Guiyang, 550014, China

    Lan Xie & Bai Xue

  5. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China

    Qiang Zheng

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  1. Kang Yan
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High EMI shielding effectiveness and superhydrophobic properties based on step-wise asymmetric structure constructed by one-step method

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Yan, K., Wu, C., Xie, L. et al. High EMI shielding effectiveness and superhydrophobic properties based on step-wise asymmetric structure constructed by one-step method. Nano Res. 16, 10483–10492 (2023). https://doi.org/10.1007/s12274-023-5713-z

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