芳纶纳米纤维增强碳纳米管@钴铁氧体纳米颗粒气凝胶薄膜具有优异的电磁干扰屏蔽、光热和焦耳加热性能

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-09-28 DOI:10.1016/j.ceramint.2024.09.384

Heng Wei , Tengfei Lei , Libiao Ma , Weihua Li

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引用次数: 0

摘要

我们通过氧化和湿化学方法将钴铁氧体（CoFe2O4，CFO）纳米粒子嵌入碳纳米管（CNT），制备出CNT@CFO。随后，通过真空辅助过滤和冷冻干燥制备了芳纶纳米纤维（ANF）增强气凝胶薄膜 CNT@CFO/ANF。CNT@CFO 均匀地穿插在有序的 ANF 层中，使气凝胶薄膜具有优异的柔韧性和拉伸性。在电磁干扰屏蔽（EMI SE）应用中，电磁耦合和丰富的异质界面可减轻阻抗失配，改善电磁波衰减。厚度为 30 μm 的 CNT@CFO/ANF 薄膜在 X 波段的 EMI SE 值为 35 dB。与 CNT/ANF 相比，CNT@CFO/ANF 的吸收系数超过 0.9，可有效减少二次反射污染。在光热转换应用中，共轭 CNT 和半导体 CFO 的双重光吸收使复合薄膜能够快速、稳定地进行光热加热。在 AM 1.5G 强度下，CNT@CFO/ANF 的稳定温度为 60.1 ℃，高于 CNT/ANF。此外，CNT 导电网络使薄膜具有快速响应、可调和长期稳定的焦耳加热能力。这些结果表明，采用简单高效的方法制备的 CNT@CFO/ANF 气凝胶薄膜在多功能柔性器件领域具有巨大的应用潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Aramid nanofiber-reinforced carbon nanotubes@cobalt ferrite nanoparticles aerogel films achieve excellent electromagnetic interference shielding, photothermal and joule heating performance

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Aramid nanofiber-reinforced carbon nanotubes@cobalt ferrite nanoparticles aerogel films achieve excellent electromagnetic interference shielding, photothermal and joule heating performance

We embedded cobalt ferrite (CoFe₂O₄, CFO) nanoparticles on carbon nanotubes (CNTs) through oxidation and wet chemical methods to prepare CNT@CFO. Subsequently, aramid nanofiber (ANF)-reinforced aerogel films CNT@CFO/ANF were prepared by vacuum-assisted filtration and freeze-drying. CNT@CFO is evenly interspersed in the ordered ANF layers, giving the aerogel film excellent flexibility and stretchability. In electromagnetic interference shielding (EMI SE) applications, electromagnetic coupling and rich heterogeneous interfaces alleviate impedance mismatch and improve the attenuation of electromagnetic waves. The CNT@CFO/ANF film with a thickness of 30 μm exhibits an EMI SE value of 35 dB in the X-band. The absorption coefficient of CNT@CFO/ANF exceeds 0.9, which effectively reduces secondary reflection pollution compared with CNT/ANF. In photothermal conversion applications, the dual light absorption of conjugated CNTs and semiconductor CFO enables the composite film to exhibit rapid and stable photothermal heating. At AM 1.5G intensity, the stable temperature of CNT@CFO/ANF is 60.1 °C, which is higher than that of CNT/ANF. In addition, the CNT conductive network enables films to achieve rapid response, adjustable, and long-term stable joule heating capabilities. These results indicate that CNT@CFO/ANF aerogel films prepared by a simple and efficient method have great application potential in the field of multifunctional flexible devices.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.