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

作　　者：Xiaotian Shi Lei Yang Sheng Li Yanjie Guo Zhibin Zhao 

机构地区：[1]Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System,Xi’an Jiaotong University,Xi'an 710049,China

出　　处：《Nano Research》2023年第5期6840-6848,共9页纳米研究（英文版）

基　　金：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;SEM facility of Instrument Analysis Center of Xi'an Jiaotong University,China.

摘　　要：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,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,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,more.

关 键 词：switchable adhesives dry adhesion gecko bionics magnetic field 

分 类 号：TB33[一般工业技术—材料科学与工程]