Nanocellulose-assisted construction of multi-cavity structured Ti3C2Tx/melamine composite sponges for enhanced electromagnetic interference shielding

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING Composites Part A: Applied Science and Manufacturing Pub Date : 2024-07-06 DOI:10.1016/j.compositesa.2024.108347

Daqiang Zhao , Xu Zhou , Tianhao Cui , Gui-Gen Wang

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Abstract

The deposition of Ti₃C₂T_x nanosheets onto an ultralight melamine sponge (MS) holds great appeal for constructing mechanically robust and high-performance electromagnetic interference (EMI) shielding composites. However, the full potential of Ti₃C₂T_x materials for shielding performance is impeded by the insufficient affinity between Ti₃C₂T_x nanosheets and MS. Herein, with the assistance of cellulose nanofibers (CNF), large-sized single-layer Ti₃C₂T_x nanosheets were firmly attached to the MS skeleton and enveloped the pores. The obtained Ti₃C₂T_x/MS composite sponges exhibit a unique multi-cavity structure. Moreover, hydrophobic modification was applied to the composites through the use of two-component silane coupling agents. The silane-modified multi-cavity structured composite sponges demonstrate significant enhancements in conductivity, mechanical strength, and environmental stability. Particularly, the incorporation of 17 wt% CNF leads to a 29.3 dB increases in shielding efficiency (SE) for the composite sponge. The enhancement can be attributed to the high reflectance of electromagnetic waves due to the highly conductive Ti₃C₂T_x/CNF cavity-membranes, the multiple internal reflections within the multi-cavity structure, and the improved interfacial polarization loss capability facilitated by the abundance of MXene-CNF interfaces.

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纳米纤维素辅助构建用于增强电磁干扰屏蔽的多腔结构 Ti3C2Tx/melamine 复合海绵

在超轻三聚氰胺海绵（MS）上沉积 Ti3C2Tx 纳米片材，对于构建机械坚固的高性能电磁干扰（EMI）屏蔽复合材料具有极大的吸引力。然而，由于 Ti3C2Tx 纳米片与三聚氰胺海绵之间的亲和力不足，阻碍了 Ti3C2Tx 材料屏蔽性能潜力的充分发挥。在此，在纤维素纳米纤维（CNF）的帮助下，大尺寸单层 Ti3C2Tx 纳米片被牢固地附着在 MS 骨架上，并包覆了孔隙。获得的 Ti3C2Tx/MS 复合海绵呈现出独特的多腔结构。此外，还使用双组分硅烷偶联剂对复合材料进行了疏水改性。硅烷改性的多腔结构复合海绵在导电性、机械强度和环境稳定性方面都有显著提高。特别是加入 17 wt% 的 CNF 后，复合海绵的屏蔽效率 (SE) 提高了 29.3 dB。这种增强可归因于高导电性 Ti3C2Tx/CNF 空腔膜带来的高电磁波反射率、多空腔结构内的多重内部反射以及大量 MXene-CNF 接口带来的更好的界面极化损耗能力。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.