Design and characterization of controllable near-zero thermal expansion graphene rubber composites

IF 7.1 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-09-09 DOI:10.1016/j.compstruct.2025.119639

Binghao Lang , Xiaoyao Xu , Heng Yang , Xuefeng Yao

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Abstract

In this paper, design and characterization of controllable near-zero thermal expansion graphene rubber composites are studied systematically. First, a novel design approach for near-zero thermal expansion materials is proposed, integrating centripetal-structured graphene aerogels (prepared via directional freezing to form radially aligned lamellae) with silicone rubber. Second, graphene rubber composites are prepared by combining silicone rubber with graphene aerogel through the surface attachment method, and the coefficient of thermal expansion of the resulting composite could be accurately controlled by precisely adjusting the mass ratio between the two components. Finally, the experimental results indicated that the axial coefficient of thermal expansion of the composite material within the temperature range of 20-100°C is as low as 3.1 × 10⁻⁷/°C, when the mass ratio of silicone rubber to graphene aerogel is set at 6:1, while the radial coefficient measures 8.9 × 10⁻⁶/°C, demonstrating near-zero expansion. The reversible compressive strain of this material reaches an impressive 99%; the maximum stress is 1.97 MPa, and its performance remains stable even after undergoing 200 cycles of compression. This study shows the composite material, with near-zero thermal expansion and excellent mechanical properties, is promising for precision engineering and intelligent devices.

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可控近零热膨胀石墨烯橡胶复合材料的设计与表征

本文系统地研究了可控近零热膨胀石墨烯橡胶复合材料的设计与表征。首先，提出了一种新的近零热膨胀材料的设计方法，将向心结构石墨烯气凝胶（通过定向冷冻制备形成径向排列的片层）与硅橡胶相结合。其次，通过表面附着法将硅橡胶与石墨烯气凝胶结合制备石墨烯橡胶复合材料，通过精确调节两组分之间的质量比，可以精确控制复合材料的热膨胀系数。最后，实验结果表明，当硅橡胶与石墨烯气凝胶的质量比为6:1时，复合材料在20-100℃范围内的轴向热膨胀系数低至3.1 × 10−7/℃，而径向热膨胀系数为8.9 × 10−6/℃，几乎为零膨胀。这种材料的可逆压缩应变达到了令人印象深刻的99%；最大应力为1.97 MPa，经过200次循环压缩后，其性能仍保持稳定。该研究表明，该复合材料具有近零热膨胀和优异的机械性能，在精密工程和智能设备方面具有广阔的应用前景。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.