A microstructure enhancement method for hard magnetic particle chains based on magnetic field oscillation sieve

Zhezai Hu; Chengqian Zhang; Haonan Sun; Huangzhe Dai; Daofan Tang; Hao Hu; Tiefeng Li; Jianzhong Fu; Peng Zhao

Materials & Design (Jan 2024)

A microstructure enhancement method for hard magnetic particle chains based on magnetic field oscillation sieve

Zhezai Hu,
Chengqian Zhang,
Haonan Sun,
Huangzhe Dai,
Daofan Tang,
Hao Hu,
Tiefeng Li,
Jianzhong Fu,
Peng Zhao

Affiliations

Zhezai Hu: The State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; The Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
Chengqian Zhang: The State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, 310027 Hangzhou, China; Corresponding authors at: The State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China.
Haonan Sun: The State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; The Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
Huangzhe Dai: The State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; The Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
Daofan Tang: The State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; The Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
Hao Hu: The State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; The Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
Tiefeng Li: The State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, 310027 Hangzhou, China
Jianzhong Fu: The State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; The Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
Peng Zhao: The State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; The Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China; Corresponding authors at: The State Key Laboratory of Fluid Power and Mechatronic Systems, College of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China.

Journal volume & issue: Vol. 237
p. 112588

Abstract

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Magnetic actuation has emerged as a prominent method in soft robots due to its charming advantages on diverse magnetization designs, which heavily rely on the microstructures formed by hard magnetic particles (NdFeB) inside the robot. However, the contradiction between the need for multiple orientations of the particles and the issue of particle agglomeration caused by repeated orientation during fabrication has not been effectively resolved. This limitation prevents additive manufacturing of high-performance magnetic soft robots and hinders further diversification of robot magnetization structures. In this study, we proposed a method that utilizes a dynamic magnetic field to re-disperse agglomerated particles. This method is able to effectively disperse the agglomerates uniformly and enhance the re-oriented particle chains in multiple aspects, including compactness, orientation (∼200 %), and maintenance time (>120 min). Furthermore, this method was utilized to improve the magneto-induced deformation (from 7.71° to 13.89°) of the Magneto-Rheological Elastomer (MRE) samples, which were fabricated with repeatedly orientated magnetizations using magnetic field-assisted Stereo-lithography (SLA). Overall, the proposed method lays the groundwork for the structural complexity of magnetic soft robots and holds significant potential for broadening the fabrication methods of magnetic soft robots.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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