Construction of Thermal Bridge in Alumina/Polydimethylsiloxane Composites by Selective Location of Erythritol

IF 3.7 2区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Langmuir Pub Date : 2025-01-29 DOI:10.1021/acs.langmuir.4c04415

Chengyang Tu, Yanjun Zeng, Yuanyuan Zhang, Feiyu Kang, Hongda Du

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Abstract

Alumina/polymer composites are conventional thermal interface materials widely used for heat dissipation. However, the interfacial thermal resistance (ITR) dominates the thermal conductivity (TC) of these composites, presenting a critical challenge. This study introduces erythritol as an innovative thermal bridge to effectively reduce the ITR by selectively locating it at the interfaces among alumina (Al₂O₃) particles. Through a straightforward preparation method, erythritol was positioned among Al₂O₃ particles, followed by the impregnation of poly(dimethylsiloxane) (PDMS) into the filler gaps. The resulting Al₂O₃/erythritol/PDMS composite demonstrated a thermal conductivity of 3.12 W·m^–1·K^–1 at an erythritol content of 4.16 wt % and a filler content of 53.7 vol %. Minor usage of erythritol brings a 34.4% enhancement compared with conventional Al₂O₃/PDMS composites. Additionally, the composite shows potential as a thermal switch due to erythritol’s phase change properties. This approach, which emphasizes fluid-state processing and interface bridging, presents a promising new strategy for improving the thermal conductivity of ceramic-filled polymer composites.

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来源期刊

Langmuir 化学-材料科学：综合

CiteScore

6.50

自引率

10.30%

发文量

1464

审稿时长

2.1 months

期刊介绍： Langmuir is an interdisciplinary journal publishing articles in the following subject categories: Colloids: surfactants and self-assembly, dispersions, emulsions, foams Interfaces: adsorption, reactions, films, forces Biological Interfaces: biocolloids, biomolecular and biomimetic materials Materials: nano- and mesostructured materials, polymers, gels, liquid crystals Electrochemistry: interfacial charge transfer, charge transport, electrocatalysis, electrokinetic phenomena, bioelectrochemistry Devices and Applications: sensors, fluidics, patterning, catalysis, photonic crystals However, when high-impact, original work is submitted that does not fit within the above categories, decisions to accept or decline such papers will be based on one criteria: What Would Irving Do? Langmuir ranks #2 in citations out of 136 journals in the category of Physical Chemistry with 113,157 total citations. The journal received an Impact Factor of 4.384*. This journal is also indexed in the categories of Materials Science (ranked #1) and Multidisciplinary Chemistry (ranked #5).