Fibrillar adhesives with unprecedented adhesion strength,switchability and scalability  

作　　者：Changhong Linghu Yangchengyi Liu Xudong Yang Dong Li Yee Yuan Tan Mohamed Haziq Bin Mohamed Hafiz Mohammad Fadhli Bin Rohani Zihao Du Jiangtao Su Yan Li Yucheng Huo Hanyan Xu Xiufeng Wang Yifan Wang Jing Yu Huajian Gao K.Jimmy Hsia 

机构地区：[1]School of Mechanical and Aerospace Engineering,Nanyang Technological University,Singapore 639798,Singapore [2]School of Materials Science and Engineering,Xiangtan University,Xiangtan 411105,China [3]Department of Engineering Mechanics,Zhejiang University,Hangzhou 310027,China [4]School of Materials Science and Engineering,Nanyang Technological University,Singapore 639798,Singapore [5]Institute of High-Performance Computing,A^(*)STAR,Singapore 138632,Singapore [6]Mechano-X Institute,Applied Mechanics Laboratory,Department of Engineering Mechanics,Tsinghua University,Beijing 100084,China [7]School of Chemistry,Chemical Engineering and Biotechnology,Nanyang Technological University,Singapore 639798,Singapore

出　　处：《National Science Review》2024年第10期14-27,共14页国家科学评论（英文版）

基　　金：supported by the Ministry of Education(MOE)of Singapore under Academic Research Fund Tier 2(MOE-T2EP50122-0001);C.L.acknowledges a Graduate Research Scholarship supported by the MOE of Singapore;Y.L.and Z.D.acknowledge the scholarship support as Visiting PhD Students from the China Scholarship Council;K.J.H.acknowledges a research start-up grant(002271-00001)from the Nanyang Technological University;H.G.acknowledges a research start-up grant(002479-00001)from the Nanyang Technological University and the Agency for Science,Technology and Research(A^(*)STAR)and the use of the A^(*)STAR Computational Resource Centre,Singapore,and National Supercomputing Centre,Singapore;H.G.and D.L.also acknowledge support from the MOE of Singapore AcRF Tier 1(Grant RG120/21).

摘　　要：Bio-inspired fibrillar ad hesives have received worldwide attention but their potentials have been limited by a trade-offbetween adhesion strength and adhesion switchability,and a size scale effect that restricts the fibrils to micro/nanoscales.Here,we report a class of adhesive fibrils that achieve unprecedented adhesion strength(∼2 MPa),switchability(∼2000),and scalability(up to millimeter-scale at the single fibrillevel),by leveraging the rubber-to-glass(R2G)transition in shape memory polymers(SMPs).Moreover,R2G SMP fibrillar ad hesive arrays exhibit a switchability of>1000(with the aid of controlled buckling)and an adhesion efficiency of 57.8%,with apparent contact area scalable to 1000 mm^(2),outperforming existing fibrillar ad hesives.We further demonstrate that the SMP fibrillar ad hesives can be used as soft grippers and reusable superglue devices that are capable of holding and releasing heavy objects>2000 times of their own weight.These findings represent significant advances in smart fibrillar adhesives for numerous applications,especially those involving high-payload scenarios.

关 键 词：JKR-DMT transition rubber-to-glass(R2G)transition R2G fibrillar adhesives shape memory polymers adhesion switchability and scalability 

分 类 号：TQ584.31[化学工程—精细化工]