| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 692669 | Progress in Organic Coatings | 2013 | 10 Pages |
•Two series of polyacrylate-PDMS block and graft copolymers were synthesized.•Microphase separation appeared clearly, especially for the block copolymers.•The water contact angle hysteresis was decreased when the PDMS chain became longer.•The interaction between the polymer surface and ice could be weakened by PDMS.•Ice adhesion strength was decreased by the contribution of PDMS.
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.
Graphical abstractThe chemical composition and topology induced by microphase separation of polyacrylate-b-PDMS have a strong effect on ice attachment. The PDMS domain aggregated on the top surface could decrease the ice adhesion strength.Figure optionsDownload full-size imageDownload as PowerPoint slide
