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Nano Research 2023, 16(7): 10483-10492 https://doi.org/10.1007/s12274-023-5713-z
Research Article | Issue | Published: 29 April 2023

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

Show Author's Information Kang Yan1,2,  Changmei Wu1,2,  Lan Xie1,2,3,4( ),  Lingjun Zeng1,2,  Yi Jiang1,2,  Zhiqiang Jiang1,2,  Guojun Chang1,2,  Bai Xue1,2,3,4( ),  Qiang Zheng5
Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China
State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, China
National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang 550014, China
National and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane Processes, Guiyang 550014, China
Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
Keywords:
phase separation, Ag nanowire, super-hydrophobicity, electromagnetic interference, step-wise asymmetric structure
Topics:
Conductive films
Cite this article:
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 Research, 2023, 16(7): 10483-10492. https://doi.org/10.1007/s12274-023-5713-z
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Abstract Full text Electronic supplementary material About this article

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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Abstract
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Electronic supplementary material
About this article

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

Show Author's information Kang Yan1,2, Changmei Wu1,2, Lan Xie1,2,3,4( ), Lingjun Zeng1,2, Yi Jiang1,2, Zhiqiang Jiang1,2, Guojun Chang1,2, Bai Xue1,2,3,4( ), Qiang Zheng5
Department of Polymer Materials and Engineering, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China
State Key Laboratory of Public Big Data, Guizhou University, Guiyang 550025, China
National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang 550014, China
National and Local Joint Engineering Research Center for Functional Polymer Membrane Materials and Membrane Processes, Guiyang 550014, China
Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China

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.

Keywords: phase separation, Ag nanowire, super-hydrophobicity, electromagnetic interference, step-wise asymmetric structure

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Publication history
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Acknowledgements

Publication history

Received: 09 March 2023
Revised: 03 April 2023
Accepted: 03 April 2023
Published: 29 April 2023
Issue date: July 2023

Copyright

© Tsinghua University Press 2023

Acknowledgements

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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