Electromagnetic wave absorption and enhanced mechanical properties of magnetic self-healing metal shell microcapsules filled polymer

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology Pub Date : 2024-10-29 DOI:10.1016/j.compscitech.2024.110944

Qian Ren , Xiaoyu Zhang , Yiran Wu , Dawei Sun , Xin Zhang

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引用次数: 0

Abstract

In this work, PUF/PU@IPDI (PPI) polymer shell microcapsules were synthesized through interfacial polymerization and in situ polymerization. Subsequently, a layer of metal Ni was plated on the surface of microcapsules to fabricate Ni/PUF/PU@IPDI (NPPI) composites. The results revealed that NPPI microcapsules exhibited superior thermal stability and mechanical properties, and NPPI-60 obtained the greatest strength (102.8 MPa). The minimum reflection loss (RL) value of the NPPI-20 composite was up to −32.8 dB at 5.5 mm and the corresponding effective absorption bandwidth (EAB) was 2.4 GHz. Additionally, the NPPI-10 composite displayed the highest healing efficiency (78.6 % and 86.6 % for the scratch depth and width, respectively), and the mechanical strength and fracture toughness of epoxy resin were enhanced by the addition of metal microcapsules. The core-shell structure established by electroless plating can endow self-healing microcapsules with outstanding mechanical characteristics as well as good wave absorption capability, indicating that NPPI composites have promising applications in the field of electromagnetic wave absorption and function and structure integration design of composites.

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填充聚合物的磁性自修复金属壳微胶囊的电磁波吸收和增强机械性能

本研究通过界面聚合和原位聚合合成了 PUF/PU@IPDI (PPI) 聚合物外壳微胶囊。随后，在微胶囊表面镀上一层金属镍，制成了镍/PUF/PU@IPDI（NPPI）复合材料。结果表明，NPPI 微胶囊具有优异的热稳定性和机械性能，其中 NPPI-60 的强度最大（102.8 兆帕）。NPPI-20 复合材料在 5.5 mm 时的最小反射损耗 (RL) 值高达 -32.8 dB，相应的有效吸收带宽 (EAB) 为 2.4 GHz。此外，NPPI-10 复合材料的愈合效率最高（划痕深度和宽度分别为 78.6 % 和 86.6 %），环氧树脂的机械强度和断裂韧性也因添加了金属微胶囊而得到增强。通过无电解电镀建立的核壳结构可使自愈合微胶囊具有出色的力学特性和良好的吸波能力，这表明 NPPI 复合材料在电磁波吸收和复合材料功能与结构一体化设计领域具有广阔的应用前景。

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来源期刊

Composites Science and Technology 工程技术-材料科学：复合

CiteScore

16.20

自引率

9.90%

发文量

611

审稿时长

33 days

期刊介绍： Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.