期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 16, 页码 14590-14599出版社
AMER CHEMICAL SOC
DOI: 10.1021/am503901f
关键词
micropillar; dry adhesive; gecko; biomimetics; roll-to-roll process
资金
- Ulsan National Institute of Science and Technology (UNIST) [UMI 1.140012.01]
- MOTIE/KEIT [10045070]
- National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2013R1A1A1061219, 2012R1A1A1040040]
- National Research Foundation of Korea [2012R1A1A1040040, 2013R1A1A1061219] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A simple yet scalable strategy for fabricating dry adhesives with mushroom-shaped micropillars is achieved by a combination of the roll-to-roll process and modulated UV-curable elastic poly(urethane acrylate) (e-PUA) resin. The e-PUA combines the major benefits of commercial PUA and poly(dimethylsiloxane) (PDMS). It not only can be cured within a few seconds like commercial PUA but also possesses good mechanical properties comparable to those of PDMS. A roll-type fabrication system equipped with a rollable mold and a UV exposure unit is also developed for the continuous process. By integrating the roll-to-roll process with the e-PUA, dry adhesives with spatulate tips in the form of a thin flexible film can be generated in a highly continuous and scalable manner. The fabricated dry adhesives with mushroom-shaped microstructures exhibit a strong pull-off strength of up to similar to 38.7 N cm(-2) on the glass surface as well as high durability without any noticeable degradation. Furthermore, an automated substrate transportation system equipped with the dry adhesives can transport a 300 mm Si wafer over 10 000 repeating cycles with high accuracy.
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