期刊
PROGRESS IN ORGANIC COATINGS
卷 76, 期 10, 页码 1435-1444出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2013.05.036
关键词
Polyacrylate-polydimethylsiloxane; Hydrophobic surface; Microphase separation; Contact angle hysteresis; Anti-icing
资金
- National Natural Science Foundation of China [51273146, 51103061]
Two series of polyacrylate-polydimethylsiloxane (PDMS) copolymers, namely, polyacrylate-b-PDMS and polyacrylate-g-PDMS with three different molecular weights of PDMS blocks or side chains, were synthesized for formation of hydrophobic surfaces for anti-icing. The main purpose of this paper was to investigate the relationship between ice adhesion strength and the surface structure of the copolymers, and to find out how the prepared PDMS-containing polyacrylate copolymers are potentially used for anti-icing. The microphase-separated structure and the surface chemical composition were analyzed by transmission electron microscopy, atomic force microscopy and X-ray photoelectron spectroscopy, and ice adhesion strength was measured using a universal testing machine in a pull off mode. Results suggested that microphase separation appeared clearly in all the copolymers, especially for the block ones. The PDMS chains aggregated on the top of the polymer surfaces caused by microphase separation could weaken the interaction between the polymer surface and water, mainly hydrogen bond, which was demonstrated because of decrease of water contact angle hysteresis. Then, ice adhesion strength was decreased by the contribution of PDMS in the block copolymers or the graft copolymer with longer PDMS side chains. It is suggested that the polyacrylate-b-PDMS or polyacrylate-g-PDMS copolymers would have practical applications in preparation of anti-icing coatings. (C) 2013 Elsevier B.V. All rights reserved.
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