Icephobic, Pt-Cured, Polydimethylsiloxane Nanocomposite Coatings
To explore novel coatings with potential for easy release of ice (icephobicity), a series of platinum-cured silicone coatings was prepared incorporating SYL-OFF 7210, designated MQ-R, as a nanoscale reinforcing component. These optically transparent coatings are designated according to cure temperat...
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| Published in: | ACS applied materials & interfaces Vol. 12; no. 9; pp. 11180 - 11189 |
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| Main Authors: | , , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
United States
American Chemical Society
04-03-2020
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | To explore novel coatings with potential for easy release of ice (icephobicity), a series of platinum-cured silicone coatings was prepared incorporating SYL-OFF 7210, designated MQ-R, as a nanoscale reinforcing component. These optically transparent coatings are designated according to cure temperature and MQ-R wt %, for example, Pt-PDMS(25)-20 for 25 °C cure and 20 wt % MQ-R. Surface characterization included dynamic contact angles and morphology by atomic force microscopy. Bulk characterization was accomplished with stress–strain measurements at 25 °C and dynamic mechanical analysis from −110 to 150 °C. Ice adhesion tests at −10 °C showed modulus had a dominant effect in increasing τ ice, the peak removal force. At −30 °C, storage modulus was greater for coatings cured at 100 °C compared to 25 °C, but ice removal tests at −30 °C (−22 °F) consistently showed τ ice for Pt-PDMS(100) MQ-R compositions was less than τ ice for corresponding Pt-PDMS(25) coatings. This unexpected result was explained by proposing that supercooled water at hydrophilic interfacial sites (−10 °C) does not impede ice removal but frozen water pins ice at −30 °C. Interestingly, MQ-R was found to be a reactive filler that increased modulus after 100 °C cure especially for Pt-PDMS(100)-30 (3 MPa) and Pt-PDMS(100)-40 (5 MPa). In summary, by virtue of resistance to ice adhesion Pt(PDMS) coatings with low MQ-R content have potential for conferring energy savings and safety while high MQ-R content results in noteworthy mechanical properties. |
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| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 1944-8244 1944-8252 |
| DOI: | 10.1021/acsami.9b20989 |