【学术报告】NP-GLIDE Coatings for Ready Shedding of Oil, Water, and Ice
日期：2023-05-09
阅读：747
报告题目： NP-GLIDE Coatings for Ready Shedding of Oil, Water, and Ice
主讲人：刘国军 教授，加拿大皇后大学，加拿大皇家科学院院士
时间：2023年5月9日（周二）15:00
地点：霞光楼220会议室
邀请人：麦亦勇 教授，颜德岳 院士
Biography:
Prof. Guojun Liu received his Ph.D. degree from the University of Toronto in 1989. He joined the University of Calgary in 1990 as an assistant professor and rose to the rank of full professor in 1999. Since 2004 he has been a Tier I Canada Research Chair in Materials Science in the Department of Chemistry at Queen’s University. Between 1994 and 2012, he led the development of nano- and micro-structured materials constructed from block and graft copolymers. Since 2012, his research has focused on the creation of various novel nanostructured polymeric materials for applications. He has co-authored more than 240 journal publications and is the principal inventor for more than 10 patents. He won from the National Science Foundation of China in 1999 “the Distinguished Overseas Chinese Young Investigator Award”. He received the Macromolecular Science and Engineering Award from the Chemical Institute of Canada in 2007. He is a fellow of the Royal Society of Canada.
Abstract: There have been tens of thousands of publications on superomniphobic and superhydrophobic coatings as well as slippery liquid infused porous surfaces (SLIPS) for water and oil repellency as well as for ice shedding. We have systematically advanced NP-GLIDE coatings. An NP-GLIDE coating features on its surface a covalently-attached liquid-like polymer monolayer and in its matrix nanometersized pools of a grafted liquid ingredient for de-wetting enablement. To prepare an NPGLIDE coating, we attach covalently a low-surface-tension liquid polymer, such as poly(dimethyl siloxane) or PDMS, onto one component of a coating formulation to yield a block or graft copolymer additive.1,2 An NP-GLIDE coating is then obtained by casting a solution containing this additive and other coating components, evaporating the solvent, and curing the resultant film. The liquid-like polymer spontaneously stratifies to the surface of the coating to form a brush layer due to its low surface tension. An NP-GLIDE coating is highly transparent, easy to fabricate, highly wear resistant, and repels oil and water without a fluorinated agent.2 It may possess simultaneously high hardness and low ice adhesion, which is not found in conventional coatings.3 For example, one of our recent coatings is almost ten times as hard as poly(ethylene terephthalate) and survives hundreds of abrasions by steel wool without sustaining any damage.4 However, its ice adhesion value t is only 1/10,000 that on glass and the low t value is maintained for tens of icing/de-icing cycles. This talk will review the preparation and performance of various NP-GLIDE coatings developed by us.
References
1. Rabnawaz, M.; Liu, G. Graft-Copolymer-Based Approach to Clear, Durable, and AntiSmudge Polyurethane Coatings. Angew. Chem. Int. Ed. 2015, 54, 6516-20.
2. Rabnawaz, M.; Liu, G.; Hu, H. Fluorine-Free Anti-Smudge Polyurethane Coatings. Angew. Chem. Int. Ed. 2015, 54, 12722-27.
3. Zheng, H.; Liu, G.; Nienhaus, B. B.; Buddingh, J. V. Ice-Shedding Polymer Coatings with High Hardness but Low Ice Adhesion. ACS Appl. Mater. Interfaces 2022, 14, 6071-82.
4. Lai, Z.; Liu, G. Facile Preparation of a Transparent and Rollable Omniphobic Coating with Exceptional Hardness and Wear Resistance. ACS Appl. Mater. Interfaces 2022, 14, 35138-4.
