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Nano Research 2023, 16(5): 6840-6848 https://doi.org/10.1007/s12274-022-5372-5
Research Article | Issue | Published: 17 January 2023

Magnetic-field-driven switchable adhesion of NdFeB/PDMS composite with gecko-like surface

Show Author's Information Xiaotian Shi,  Lei Yang( ),  Sheng Li,  Yanjie Guo,  Zhibin Zhao
Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi’an Jiaotong University, Xi'an 710049, China
Keywords:
magnetic field, switchable adhesives, dry adhesion, gecko bionics
Topics:
Lithium batteries
Cite this article:
Shi X, Yang L, Li S, et al. Magnetic-field-driven switchable adhesion of NdFeB/PDMS composite with gecko-like surface. Nano Research, 2023, 16(5): 6840-6848. https://doi.org/10.1007/s12274-022-5372-5
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Abstract Full text Electronic supplementary material About this article

Switchable adhesives have attracted widespread attention due to their strong reusability and adaptability to operate stably in complex environments. However, the simple fabrication of adhesive structures and reliable control of adhesion remain challenging. Here, we developed a neodymium iron boron/polydimethylsiloxane (NdFeB/PDMS) magnetic composite with optimal mechanical and magnetic performance. Then we fabricated lamellar structures and setal arrays using a molding and magnetic field-induced process, imitating the multi-level adhesion system of gecko feet. The lamellar can be deformed under the action of a magnetic field to control the adhesion, and the setal array is used to enhance adhesion and provide self-cleanability to the adhering surface. Switchable adhesion was realized by applying an external magnetic field, where the maximum adhesion strength was 5.1 kPa, and the switchable range was within 40%. Through finite element analysis simulations and experimental verification, it was proved that the adhesion force variation was ascribed to the magnetic field-induced surface deformation. Finally, we installed the adhesive on the end of the robotic arm, realizing the transfer of the target object. This work provides a simple method to fabricate a gecko-like surface and a practical strategy to realize switchable adhesion, which sheds light on broad application potential in production lines, medical products, and more.


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Electronic supplementary material
About this article

Magnetic-field-driven switchable adhesion of NdFeB/PDMS composite with gecko-like surface

Show Author's information Xiaotian Shi, Lei Yang( ), Sheng Li, Yanjie Guo, Zhibin Zhao
Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi’an Jiaotong University, Xi'an 710049, China

Abstract

Switchable adhesives have attracted widespread attention due to their strong reusability and adaptability to operate stably in complex environments. However, the simple fabrication of adhesive structures and reliable control of adhesion remain challenging. Here, we developed a neodymium iron boron/polydimethylsiloxane (NdFeB/PDMS) magnetic composite with optimal mechanical and magnetic performance. Then we fabricated lamellar structures and setal arrays using a molding and magnetic field-induced process, imitating the multi-level adhesion system of gecko feet. The lamellar can be deformed under the action of a magnetic field to control the adhesion, and the setal array is used to enhance adhesion and provide self-cleanability to the adhering surface. Switchable adhesion was realized by applying an external magnetic field, where the maximum adhesion strength was 5.1 kPa, and the switchable range was within 40%. Through finite element analysis simulations and experimental verification, it was proved that the adhesion force variation was ascribed to the magnetic field-induced surface deformation. Finally, we installed the adhesive on the end of the robotic arm, realizing the transfer of the target object. This work provides a simple method to fabricate a gecko-like surface and a practical strategy to realize switchable adhesion, which sheds light on broad application potential in production lines, medical products, and more.

Keywords: magnetic field, switchable adhesives, dry adhesion, gecko bionics

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Publication history
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Acknowledgements

Publication history

Received: 22 September 2022
Revised: 23 November 2022
Accepted: 30 November 2022
Published: 17 January 2023
Issue date: May 2023

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

The authors thank the National Nature Science Foundation of China (No. 52275210), the Natural Science Foundation of Shaanxi Province (No. 2022JM-175), the Fundamental Research Funds for the Central Universities, and SEM facility of Instrument Analysis Center of Xi'an Jiaotong University, China.

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