Customizable Resilient Multifunctional Graphene Aerogels via Blend-spinning assisted Freeze Casting,ACS Nano

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Customizable Resilient Multifunctional Graphene Aerogels via Blend-spinning assisted Freeze Casting
ACS Nano ( IF 15.8 ) Pub Date : 2023-08-04 , DOI: 10.1021/acsnano.3c02491
Yijing Zhao ₁ , Haobo Qi ₁ , Xinyu Dong ₁ , Yong Yang ₂ , Wei Zhai ₁

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Graphene aerogels have gained considerable attention due to their unique physical properties, but their poor mechanical properties and lack of functionality have hindered their advanced applications. In this study, we propose a blend-spinning-assisted freeze-casting (BSFC) strategy to incorporate particle-modified carbon fibers into graphene aerogels for mechanical strengthening and functional enhancement. This method offers a great deal of freedom in the creation of customizable multimaterial, multiscale structural graphene aerogels. For example, we fabricated silicon carbide particle modified carbon fiber reinforced graphene (SiC/CF-GA) aerogels. The resulting aerogels display excellent properties such as being ultralightweight and highly resilient and having fatigue compression resistance (1000 cycles at 50% strain). Meanwhile, enhanced resilience inspired the effective strain-sensing capabilities of SiC/CF-GA aerogels with a sensitivity of 13.8 kPa^–1. The adjustable dielectric properties due to SiC particle incorporation endow the SiC/CF-GA aerogel with a broad-band (8.0 GHz) effective electromagnetic wave attenuation performance. Besides, different particles could be incorporated into graphene aerogels via the BSFC strategy, allowing for customizable designs. Moreover, multifunctionalities were demonstrated by the modified aerogels, including noise absorption, thermal insulation, fire resistance, and waterproofing, further diversifying their practicality. Hence, the BSFC strategy provides a customized solution for fabricating modified graphene aerogels for advanced functional applications.

中文翻译：

通过共混纺丝辅助冷冻铸造可定制弹性多功能石墨烯气凝胶

石墨烯气凝胶因其独特的物理性质而受到广泛关注，但其较差的机械性能和功能性的缺乏阻碍了其高级应用。在这项研究中，我们提出了一种共混纺丝辅助冷冻铸造（BSFC）策略，将颗粒改性碳纤维纳入石墨烯气凝胶中，以实现机械强化和功能增强。这种方法为创建可定制的多材料、多尺度结构石墨烯气凝胶提供了很大的自由度。例如，我们制造了碳化硅颗粒改性碳纤维增强石墨烯（SiC/CF-GA）气凝胶。所得气凝胶显示出优异的性能，例如超轻、高弹性和抗疲劳压缩性（50% 应变下 1000 次循环）。同时，增强的弹性激发了SiC/CF-GA气凝胶的有效应变传感能力，灵敏度为13.8 kPa ^–1。由于SiC颗粒的掺入而产生的可调节介电性能赋予SiC/CF-GA气凝胶具有宽带（8.0 GHz）有效电磁波衰减性能。此外，可以通过 BSFC 策略将不同的颗粒纳入石墨烯气凝胶中，从而实现可定制的设计。此外，改性气凝胶还表现出吸音、隔热、防火、防水等多功能性，进一步丰富了其实用性。因此，BSFC 策略为制造用于先进功能应用的改性石墨烯气凝胶提供了定制解决方案。

更新日期：2023-08-04

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