One-Pot Synthesis of Conductive Metal–Organic Framework@polypyrrole Hybrids with Enhanced Electromagnetic Wave Absorption Performance

Small Structures Pub Date : 2024-07-17 DOI:10.1002/sstr.202400205

Jiale Wu, Kang Wang, Song Ye, Qinglin Zhou, Shengqi Lu, Yuquan Laigao, Lai Jiang, Lanxin Wei, Aming Xie, Haibo Zeng, Weijin Li

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Abstract

Rational heterostructure design can bring interfacial polarization relaxation to significantly enhance the electromagnetic wave (EMW) absorption performance. However, intelligently building a homogeneous heterostructure with superior EMW absorption properties remains a great challenge. Herein, a typical conductive metal–organic framework Cu₃(HHTP)₂ (hexahydroxytriphenylene, HHTP) is delicately packed onto a polypyrrole (PPy) conductive polymer surface via a one-step in situ polymerization approach. Results show that Cu₃(HHTP)₂ is well packed on the PPy surface to form an elegant Cu₃(HHTP)₂@PPy hybrids interfacial microstructure with a unique superiority regarding EMW absorption compared with single components of PPy and Cu₃(HHTP)₂. Interestingly, the interfacial microstructure of Cu₃(HHTP)₂@PPy hybrids can be tuned by adjusting the composition of the PPy and Cu₃(HHTP)₂, resulting in the improvement of impedance matching, conductive loss, and enhancement of interfacial polarization relaxation, endowing the optimization of the EM wave absorption properties of the Cu₃(HHTP)₂@PPy. The broad effective absorption bandwidth covers a range as broad as 6.68 GHz (11.00–17.68 GHz), which is higher than most reported metal-organic frameworks (MOFs) and conductive polymer-based EM absorbing materials. Herein, new insight for developing highly efficient EMW absorption materials through hybridized interfacial microstructure engineering is provided.

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一锅合成具有增强电磁波吸收性能的导电金属有机框架@聚吡咯杂化物

合理的异质结构设计可以带来界面极化弛豫，从而显著提高电磁波（EMW）吸收性能。然而，如何智能地构建具有优异电磁波吸收性能的均相异质结构仍然是一个巨大的挑战。在本文中，通过一步原位聚合法将典型的导电金属有机框架 Cu3(HHTP)2（六羟基三亚苯，HHTP）微妙地填充到聚吡咯（PPy）导电聚合物表面。结果表明，Cu3(HHTP)2 被很好地包裹在 PPy 表面，形成了优雅的 Cu3(HHTP)2@PPy 混合物界面微观结构，与 PPy 和 Cu3(HHTP)2 的单一成分相比，它在电磁波吸收方面具有独特的优越性。有趣的是，Cu3(HHTP)2@PPy 杂化物的界面微结构可以通过调整 PPy 和 Cu3(HHTP)2 的成分来调节，从而改善阻抗匹配、导电损耗和增强界面极化弛豫，优化 Cu3(HHTP)2@PPy 的电磁波吸收特性。其宽广的有效吸收带宽范围可达 6.68 GHz（11.00-17.68 GHz），高于大多数已报道的金属有机框架（MOFs）和导电聚合物基电磁波吸收材料。本文为通过杂化界面微结构工程开发高效电磁波吸收材料提供了新的见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Small Structures

CiteScore

17.30

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0.00%

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