Capillarity-assisted assembly of composite fibers to enable highly conductive fabrics for electromagnetic interference shielding

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology Pub Date : 2024-05-10 DOI:10.1016/j.compscitech.2024.110659

Ying Lu , Jiali Xu , Yutong Liu , Jingling Ban , Xiufang Li , Mufang Li , Yang Zhou , Dong Wang , Longhai Piao

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Abstract

Poor adhesion between silver nanomaterials and substrates seriously restricts the development of electronic composite devices. In this work, flexible and conductive silver nanowires/fibroin/degummed silk (AgNWs/fibroin/dSF) composite fibers with high adhesion and conductivity via capillarity-assisted assembly for electromagnetic interference (EMI) shielding are designed and fabricated by a facile and scalable all-solution dip-coating method. The nanocomposite fiber possesses high conductivity with a resistance of 8.8 Ω/cm at a low AgNWs/fibroin loading of 19.3 wt%. The assistance of the capillary force in the fiber highly increases the mass of deposited AgNWs. Furthermore, the AgNWs show high adhesion on the fibers in the tape-peel test. The enhanced deposition factors and mechanisms are detailly investigated. Moreover, the composite fibers are further woven into a soft and flexible fabric. The composite fabric shows an absorption-dominated EMI shielding performance with an efficient shielding effectiveness of 38 dB. The capillarity-assisted assembly is an attractive procedure for constructing high-conductive and uniform coatings for a wide application.

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通过毛细管辅助组装复合纤维，制成用于屏蔽电磁干扰的高导电织物

银纳米材料与基底之间的粘附性差严重制约了电子复合器件的发展。在这项工作中，我们设计并采用简便、可扩展的全溶液浸涂法，通过毛细管辅助组装，制备了具有高附着力和导电性的柔性导电银纳米线/纤维素/脱胶丝（AgNWs/fibroin/dSF）复合纤维，用于电磁干扰（EMI）屏蔽。这种纳米复合纤维具有高导电性，在 AgNWs/ 纤维素的低负载量（19.3 wt%）条件下，电阻为 8.8 Ω/cm。纤维中毛细力的帮助大大增加了沉积 AgNWs 的质量。此外，在胶带剥离测试中，AgNWs 在纤维上显示出很高的附着力。我们对增强沉积的因素和机制进行了详细研究。此外，复合纤维还被进一步编织成柔软而有弹性的织物。这种复合织物具有以吸收为主的电磁干扰屏蔽性能，有效屏蔽效能达 38 dB。毛细管辅助装配是一种极具吸引力的方法，可用于制造高导电性的均匀涂层，应用范围十分广泛。

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来源期刊

Composites Science and Technology 工程技术-材料科学：复合

CiteScore

16.20

自引率

9.90%

发文量

611

审稿时长

33 days

期刊介绍： Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.

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