Flexible and antistatic carbon fiber/silicone rubber composite coating with improved thermal stability, mechanical and wave-transmission properties

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composites Communications Pub Date : 2024-10-20 DOI:10.1016/j.coco.2024.102130

Siyu Liu , Xiaoyu Li , Yanxiao Dong , Xun Sun , Meijie Yu , Bo Zhu , Chuanjian Zhou

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Abstract

The properties of the interface have a significant impact on the application of silicone rubber (SR) composite coating fillers with carbon fiber (CF). The one-step growth of silica nanoparticles on the fiber surface was investigated in terms of the mechanical, electrical, and thermal properties of the CF/SR composite coatings. The results showed that the tensile strength and elongation of the composite with modified fibers were 7.13 ± 0.44 MPa and 690.40 ± 37.04 %, which were 20.44 % and 23.22 % higher than those with unmodified CFs, respectively. The improvement in interfacial adhesion by silica modification effectively disperses stress and avoids stress concentration. Additionally, the introduction of the low-dielectric material SiO₂ and the reduction of the interfacial polarization enhanced the wave-transmission properties and weakened the electromagnetic wave-shielding properties of the composites. Meanwhile, the silica modification maintained the antistatic properties of the coatings at room and high temperatures, as well as before and after bending. The weight loss of the composites with modified fibers was lower than that of the composites with unmodified fibers, while the thermal conductivity was higher because of the stable structure of the Si-O-Si bonds and interfacial adhesion. This work provides a simple way to enhance the thermal resistance, thermal conductivity, mechanical and wave-transmission properties, and preserve the antistatic properties as well as the flexibility of CF/SR composite coatings.

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柔性抗静电碳纤维/硅橡胶复合涂层，具有更好的热稳定性、机械性能和透波性能

界面的特性对硅橡胶（SR）与碳纤维（CF）复合涂层填料的应用具有重要影响。研究人员从 CF/SR 复合涂层的力学、电学和热学特性方面，对一步法在纤维表面生长二氧化硅纳米颗粒进行了研究。结果表明，改性纤维复合材料的拉伸强度和伸长率分别为 7.13 ± 0.44 MPa 和 690.40 ± 37.04 %，比未改性 CF 的拉伸强度和伸长率分别高 20.44 % 和 23.22 %。二氧化硅改性改善了界面粘附性，有效分散了应力，避免了应力集中。此外，低介电材料 SiO2 的引入和界面极化的降低增强了复合材料的透波性能，削弱了电磁波屏蔽性能。同时，二氧化硅改性保持了涂层在室温、高温以及弯曲前后的抗静电性能。与未改性纤维的复合材料相比，改性纤维复合材料的重量损失更低，而由于 Si-O-Si 键的稳定结构和界面粘附性，复合材料的导热性更高。这项研究为提高 CF/SR 复合涂层的热阻、热导率、机械和透波性能，并保持其抗静电性能和柔韧性提供了一种简单的方法。

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.