Continuous and Scalable Fabrication of Bioinspired Dry Adhesives via a Roll-to-Roll Process with Modulated Ultraviolet-Curable Resin

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• 作者：Hoon Yi ; Insol Hwang ; Jeong Hyeon Lee ; Dael Lee ; Haneol Lim ; Dongha Tahk ; Minho Sung ; Won-Gyu Bae ; Se-Jin Choi ; Moon Kyu Kwak ; Hoon Eui Jeong
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：August 27, 2014
• 年：2014
• 卷：6
• 期：16
• 页码：14590-14599
• 全文大小：572K
• ISSN：1944-8252

文摘

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 鈭?8.7 N cm^鈥? 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鈥?00 repeating cycles with high accuracy.

Keywords:

micropillar; dry adhesive; gecko; biomimetics; roll-to-roll process