Chinese Journal of Polymer Science2018年36卷第8期 页码:953-959
Affiliations:
College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China
Author bio:
qianzhao@zju.edu.cn
Funds:
This work was financially supported by the National Natural Science Foundation of China (Nos. 21504077 and 51673169), Natural Science Foundation of Zhejiang Province for Distinguished Young Scholar (No. LR18E030001), and National Key Basic Research Program of China (No. 2015CB351903).
Transfer printing is a critical procedure for manufacturing stretchable electronics. During such a procedure
stamps are utilized to transfer micro devices from silicon wafers to stretchable polymeric substrates. In addition to conventional silicone rubber stamps
epoxy resin based shape memory stamps have been developed and the transfer yield is thus significantly promoted. However
elastic modulus of the epoxy stamps is too high at both glassy and rubbery states
which may break the brittle micro devices during the adhesion process under mechanical pressure. In this work
we synthesized a copolymer of butyl acrylate (BA) and polycaprolactone diacrylate (PCLDA) as a soft reversible dry adhesive enabling a shape memory capability based on crystalline transition of polycaprolactone (PCL) segments. For the sample containing 40 wt% BA and 60 wt% PCLDA
Young’s modulus was 8.3 and 0.9 MPa respectively below and above the thermal transition temperature
which was much lower than that of the epoxy adhesive. On the other hand
the soft material still provided nearly ideal shape memory fixity and recovery ratios. Subsequently
shape memory surface with cone-shaped microstructure was prepared
which enabled a heating induced strong-to-weak adhesion transition when the microstructure recovered from a pressed temporary morphology to the permanent cone-shaped morphology. Such a soft reversible dry adhesive may contribute to large-scale and automated transfer printing processing.
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references
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相关作者
Jin-Tao Feng
Long Ye
Fei Huang
He-Bing Nie
Lu Hao
Jing-Chuan Chen
Zhi-Yuan Yang
Xue-Fei Wu
相关机构
School of Materials Science and Engineering, State key Laboratory of Advanced Materials for Intelligent Sensing, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Key Laboratory of Organic Integrated Circuits, Ministry of Education, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University
National Synchrotron Radiation Laboratory, University of Science and Technology of China
Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley CA
Interdisciplinary Research Center for Chemical, Life and Health Sciences, Institute of Chemistry, Chinese Academy of Sciences
Institute of Polymer Optoelectronic Materials and Devices, Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology