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磁驱动三维编织形状记忆复合材料(SMPCs)结合远程磁响应与大变形能力，在智能材料领域展现出广阔应用前景。为探究编织结构与磁性颗粒质量分数对材料形状记忆行为的协同效应，本研究采用熔融挤出工艺制备Fe_3O4/形状记忆聚氨酯(SMPU)-连续碳纤维(CCF)芯壳复合长丝，通过三维编织技术与热压成型工艺制备不同编织角(15°、25°、35°)及不同Fe_3O4质量分数(3%、6%、9%)下的磁驱动SMPCs。基于形状记忆试验来分析材料形状记忆性能。结果表明：在热驱动条件下，Fe_3O4质量分数从3%提升至9%,材料形状回复时间由39 s缩短至25 s,所有样品形状回复率均超过90%。在磁驱动条件下，3%-15°样品在磁场强度为4.53 mT时形状回复时间仅为45 s,比磁场强度为3.02 mT时减少62.5%。较小编织角和较高Fe_3O4质量分数展现出更快的回复速度与更高的形状回复率。9%-15°样品在磁场强度为4.53 mT时13 s即可完成回复，形状回复率高达98.6%。合理设计编织结构与Fe_3O4质量分数，可对SMPCs形状记忆行为进行有效调控，为开发远程控制智能器件提供理论支撑。
Abstract：Magnetically driven three-dimensional braided shape memory composites(SMPCs) combining remote magnetic response with large deformation capability show promising applications in the field of smart materials. In order to investigate the synergistic effect of braiding structure and magnetic particle content on the shape memory behavior of the materials, in this study, Fe_3O4/shape memory polyurethane(SMPU)-continuous carbon fiber(CCF) core-shell composite filaments were prepared using a melt extrusion process, and the composite filaments with different braiding angles(15°, 25°, and 35°) and Fe_3O4 mass fraction(3%, 6%, 9%) magnetically driven SMPCs were prepared by three-dimensional braiding technique and hot press forming process, and the shape memory properties of the materials were analyzed based on shape memory test. The results show that under the thermally driven condition, the Fe_3O4 mass fraction increases from 3% to 9%, and the material shape return time is shortened from 39 s to 25 s. The shape return rate of all samples exceeded 90%. Under magnetically driven conditions, the shape recovery time of the 3%-15° sample was only 45 s at a magnetic field strength of 4.53 mT, which was 62.5% less than that at a magnetic field strength of 3.02 mT. The smaller braiding angle and higher Fe_3O4 mass fraction show faster recovery and higher shape recovery, and the 9%-15° samples can be recovered in 13 s at a magnetic field strength of 4.53 mT, with a shape recovery of 98.6%. The shape memory behavior of SMPCs can be effectively regulated by the rational design of the braiding structure and Fe_3O4 mass fraction, which provides theoretical support for the development of remote-controlled smart devices.
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基本信息:
DOI：10.19886/j.cnki.dhdz.2025.0185
中图分类号:TB332
引用信息:
[1]缪宇,孙宝忠,顾伯洪,等.三维编织复合材料磁热驱动形状记忆行为[J].东华大学学报(自然科学版),2026,52(03):24-30.DOI:10.19886/j.cnki.dhdz.2025.0185.
基金信息:
国家自然科学基金(12372130)
2026-01-26
2026-01-26
2026-01-26