受氢键调节的超分子聚合物中的声子传输。

IF 9.6 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Nano Letters Pub Date : 2024-11-06 Epub Date: 2024-10-07 DOI:10.1021/acs.nanolett.4c04306
Ting Meng, Peng Zhang, Hongmei Zhong, Hongda Zhu, Hui Zhang, Dongyan Xu, Yang Zhao
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引用次数: 0

摘要

超分子聚合物具有多稳定性、高响应性和成本效益,因此在热管理应用中大有可为。在这项研究中,我们通过调整分子间氢键的强度,成功地在分子水平上调节了超分子聚合物中的声子传输。我们以三聚氰胺(M)和羟基苯甲酸的三种简单位置异构体为基础,合成了三种热导率差异高达 289% 的超分子聚合物纤维。差示扫描量热法(DSC)测量显示,聚合物的热稳定性存在差异,稳定性较高的结构具有更强的导热性。傅立叶变换红外光谱(FTIR)测量和密度泛函理论(DFT)计算表明,这些差异是由不同成键位点的氢键强度变化引起的。氢键强度越高,热通道越稳定,声子散射越小,热导率越高。我们的发现为控制聚合物纤维的热导率提供了宝贵的见解,为基于声子的热设备的应用铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Phonon Transport in Supramolecular Polymers Regulated by Hydrogen Bonds.

Phonon Transport in Supramolecular Polymers Regulated by Hydrogen Bonds.

Supramolecular polymers hold promise in thermal management applications due to their multistability, high responsiveness, and cost-effectiveness. In this work, we successfully regulate phonon transport at the molecular level in supramolecular polymers by adjusting the strength of intermolecular hydrogen bonding. We synthesized three supramolecular polymer fibers with thermal conductivity differences of up to 289% based on melamine (M) and three simple positional isomers of hydroxybenzoic acid. Differential Scanning Calorimetry (DSC) measurement revealed discrepancies in thermal stability of the polymers, where structures with higher stability exhibited enhanced thermal conductivity. Fourier Transform Infrared Spectroscopy (FTIR) measurement and Density Functional Theory (DFT) calculations indicate that these differences arise from variations in hydrogen-bonding strengths at different bonding sites. Higher hydrogen-bonding strength leads to more stable thermal pathways, reduces phonon scattering, and increases thermal conductivity. Our findings provide valuable insights into controlling the thermal conductivity of polymer fibers, paving the way for applications in phonon-based thermal devices.

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来源期刊
Nano Letters
Nano Letters 工程技术-材料科学:综合
CiteScore
16.80
自引率
2.80%
发文量
1182
审稿时长
1.4 months
期刊介绍: Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.
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