Facile fabrication of lightweight porous FDM-printed polyethylene/graphene nanocomposites with enhanced interfacial strength for electromagnetic interference shielding

Jingjing Jing, Yu Xiong, Shaohong Shi, Haoran Pei, Yinghong Chen, Philippe Lambin

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    Résumé

    In order to shield the massive electromagnetic perturbations and meet the more and more stringent requirement for advanced electronic equipment, development of diverse, lightweight and high-performance electromagnetic interference (EMI) shielding materials is urgent but still challenging. Herein, the facile and green method which combines fused deposition modeling (FDM) 3D printing, ball milling and microwave (MW) irradiation tech­ nology was proposed to fabricate exfoliated graphene nanoplatelets (GNPs) incorporated liner low density polyethylene (LLDPE) nanocomposite lightweight parts with porous and complex geometry structure. FDM 3D printing possesses high flexibility for structure design, which can significantly broaden the application of ma­ terials in various fields. Benefiting from design of a unique porous lamellar structure, the printed LLDPE/GNPs nanocomposite parts can achieve a prominent EMI shielding effectiveness (SE) of ~32.4 dB (with thickness- normalized specific EMI SE (SSE/t) of 318 dB cm2/g) in the range of 8.2–12.4 GHz. This remarkable charac­ teristic is due to internal multiple reflections and absorption of electromagnetic (EM) waves. In addition, the specific FDM 3D-printed porous parts prepared by our strategy exhibit a relatively higher EMI SE at a lower density than those lightweight EMI shields in literatures. The use of MW irradiation technology improves me­ chanical properties, especially for the interfacial bonding strength between filaments. More importantly, this strategy is highly favorable for the fabrication of lightweight porous EMI shields with tailorable and optimized shape/structure, which could be expected to be applied in aerospace fields, portable electronic devices, smart devices and so on.
    langue originaleAnglais
    Numéro d'article108732
    Nombre de pages10
    journalComposites Science and Technology
    Volume207
    Les DOIs
    Etat de la publicationPublié - 3 mai 2021

    Financement

    This work is financially supported by the National Key R&D Program of China ( 2017YFE0111500 ), the National Natural Science Foundation of China ( 51933007 and 51721091 ), the International Science & Technology Innovation Cooperation Project of Sichuan Province ( 2021YFH0088 ), the European Union's H2020-MSCA-RISE-734164 Graphene 3D Project, the Project of State Key Laboratory of Polymer Materials Engineering (Sichuan University) ( sklpme2020-2-01 ), and the Program of Innovative Research Team for Young Scientists of Sichuan Province ( 2016TD0010 ).

    Bailleurs de fondsNuméro du bailleur de fonds
    European Union's H2020-MSCA-RISE-734164
    International Science & Technology Innovation Cooperation Project of Sichuan Province2021YFH0088
    Program of Innovative Research Team for Young Scientists of Sichuan Province2016TD0010
    Horizon 2020 Framework Programme734164
    National Natural Science Foundation of China51933007, 51721091
    Sichuan Universitysklpme2020-2-01
    State Key Laboratory of Polymer Materials Engineering
    National Key Research and Development Program of China2017YFE0111500

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