Fabrication of ultra-high strength MWCNTs/CI /PI rigid composite foam with excellent microwave absorption performance by pressure foaming method

IF 6.5 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2024-10-18 DOI:10.1016/j.coco.2024.102117

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引用次数: 0

Abstract

Polyimide (PI) foam exhibits excellent high-temperature resistance and outstanding physical and chemical stability, making it an ideal matrix for absorbing materials. However, the growing demand for absorbing materials that can serve as load-bearing components has revealed that existing polyimide composite foams often fall short of practical application requirements due to their low mechanical properties. The study employed a simple foaming method using isocyanate-based polyimide as the foam base under a 0.2 MPa atm. Multi-walled carbon nanotubes (MWCNTs) and carbonyl iron (CI) powder were added sequentially to the precursor solution. Under the filling parameters of 2.0 % MWCNTs and 10 % CI powder, the compressive strength of polyimide composite foam reaches 16.2 MPa and exhibits excellent microwave absorption properties, with a minimum reflection loss (RL_min) of −62.51 dB and an effective absorption bandwidth (EAB) of 7.86 GHz. Additionally, the prepared composite foam has potential infrared stealth capability. This work offers new insights for rapid and low-cost manufacturing of high-strength absorbing foam.

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利用压力发泡法制造具有优异微波吸收性能的超高强度 MWCNTs/CI /PI 硬质复合泡沫

聚酰亚胺（PI）泡沫具有优异的耐高温性能和出色的物理和化学稳定性，是吸波材料的理想基体。然而，随着对可用作承重部件的吸波材料的需求日益增长，现有的聚酰亚胺复合泡沫由于机械性能较低，往往无法满足实际应用的要求。本研究采用了一种简单的发泡方法，在 0.2 兆帕大气压下使用异氰酸酯基聚酰亚胺作为泡沫基材。多壁碳纳米管（MWCNTs）和羰基铁（CI）粉末被依次添加到前驱体溶液中。在 2.0 % MWCNTs 和 10 % CI 粉末的填充参数下，聚酰亚胺复合泡沫的抗压强度达到 16.2 MPa，并表现出优异的微波吸收特性，最小反射损耗 (RLmin) 为 -62.51 dB，有效吸收带宽 (EAB) 为 7.86 GHz。此外，制备的复合泡沫还具有潜在的红外隐身能力。这项研究为快速、低成本制造高强度吸收泡沫提供了新的思路。

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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.