4D printing of Nd-Fe-B composites with both shape memory and permanent magnet excitation deformation

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2024-09-01 DOI:10.1016/j.compositesa.2024.108443

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引用次数: 0

Abstract

Novel composite filaments are developed by mixing PLA, TPU, and Nd-Fe-B components and utilizing melt extrusion for 4D printing. The results reveal that the Nd-Fe-B magnetic particles are uniformly dispersed in the PLA/TPU polymer matrix, and the composite filaments meet the requirements of high-precision printing. Increasing the proportion of Nd-Fe-B magnetic particles in the composite contributes to higher remanence, coercivity, and magnetic energy product for the printed magnets. Under the 70 °C thermal stimulus, it has a high shape fixed ratio (>99 %), a high shape recovery ratio (>90 %), and a rapid response time (≤6.55 s). The magnetic particles accelerate the shape recovery process. Moreover, the petal-like structure and the hollow ball structure are designed and printed. After deformation, each structure can nearly fully recover its initial shape. This recovery is achieved through a non-contact stimulus response based on ’thermal-magnetic’ coupling. The grippers printed by the developed composite show comprehensive properties of shape memory and magnetically controlled smart gripping.

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具有形状记忆和永磁激励变形的钕铁硼复合材料的 4D 印刷

将聚乳酸（PLA）、热塑性聚氨酯（TPU）和钕铁硼（Nd-Fe-B）成分混合，并利用熔融挤出技术进行 4D 打印，开发出了新型复合长丝。结果表明，Nd-Fe-B 磁性粒子均匀地分散在聚乳酸/热塑性聚氨酯聚合物基体中，复合长丝符合高精度打印的要求。提高复合材料中钕铁硼磁性颗粒的比例有助于提高打印磁体的剩磁、矫顽力和磁能积。在 70 °C 的热刺激下，它具有高形状固定率（99%）、高形状恢复率（90%）和快速响应时间（≤6.55 秒）。磁性颗粒加速了形状恢复过程。此外，还设计并印刷了花瓣状结构和空心球结构。变形后，每种结构几乎都能完全恢复其初始形状。这种恢复是通过基于 "热-磁 "耦合的非接触刺激响应实现的。由所开发的复合材料打印出的抓手具有形状记忆和磁控智能抓取的综合特性。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.