title: Continuous and scalable fabrication of bioinspired dry adhesives via a roll-to-roll process with modulated ultraviolet-curable resin.
abstract: 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 ∼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.
authors.affiliation: Department of Mechanical Engineering, Ulsan National Institute of Science and Technology , Ulsan 689-798, Republic of Korea.
authors.forename: Hoon
authors.initials: H
authors.lastname: Yi
authors.forename: Insol
authors.initials: I
authors.lastname: Hwang
authors.forename: Jeong Hyeon
authors.initials: JH
authors.lastname: Lee
authors.forename: Dael
authors.initials: D
authors.lastname: Lee
authors.forename: Haneol
authors.initials: H
authors.lastname: Lim
authors.forename: Dongha
authors.initials: D
authors.lastname: Tahk
authors.forename: Minho
authors.initials: M
authors.lastname: Sung
authors.forename: Won-Gyu
authors.initials: WG
authors.lastname: Bae
authors.forename: Se-Jin
authors.initials: SJ
authors.lastname: Choi
authors.forename: Moon Kyu
authors.initials: MK
authors.lastname: Kwak
authors.forename: Hoon Eui
authors.initials: HE
authors.lastname: Jeong
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry*; D000269:Adhesives; D011108:Polymers / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*
chemical_list: D000180:Acrylic Resins; D000269:Adhesives; D011108:Polymers; D011140:Polyurethanes; C050845:urethane acrylate