Micro- and nano-porous surface patterns prepared by surface-confined directional melt crystallization of solvent
- Authors
- Kim, Byoung Soo; Kim, Hyun Jin; An, Suyeong; Chi, Sangwon; Kim, Junseok; Lee, Jonghwi
- Issue Date
- 1-Jul-2017
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Ice templating; Freeze casting; Directional freezing; Melt crystallization; 1,4-dioxane; Shear stress; Freeze drying; Polymer solute
- Citation
- JOURNAL OF CRYSTAL GROWTH, v.469, pp 184 - 190
- Pages
- 7
- Journal Title
- JOURNAL OF CRYSTAL GROWTH
- Volume
- 469
- Start Page
- 184
- End Page
- 190
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/18986
- DOI
- 10.1016/j.jcrysgro.2016.08.065
- ISSN
- 0022-0248
1873-5002
- Abstract
- Recently, numerous attempts have been made to engineer micro- and nano-porous surface patterns or to develop convenient preparation methods for the practical applications of self-cleaning surfaces, water-repellent surfaces, novel textures, etc. Herein, we introduce a simple, cheap, and repeatable crystallization-based method to produce porous surface structures, on any surface of already fabricated polymeric materials. Contact of the solvent phase with cooled polymer surfaces enabled the limited dissolution of the surfaces and the subsequent extremely fast melt crystallization of the solvent. After removing the crystals, various micro- and nano-porous patterns were obtained, whose pore sizes ranged over three orders of magnitude. Pore depth was linearly dependent on the dissolution time. Crystal growth was mainly directed normal to the surfaces, but it was also controlled in-plane, resulting in cylindrical or lamellar structures. Superhydrophobic surfaces were successfully prepared on both polystyrene and polycarbonate. This process offers a novel surface engineering tool for a variety of polymer surfaces, whose topology can be conveniently controlled over a wide range by crystal engineering. (C) 2016 Elsevier B.V. All rights reserved.
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Collections - College of Engineering > School of Chemical Engineering and Material Science > 1. Journal Articles
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