Pezić, Ena; Brdek, Dora; Postonjski, Margareta; Marušić, Katarina (2025) Synergistic vs. sequential assembly: A path to optimized irradiation-crosslinked polymer nanocoatings on metals. Radiation Physics and Chemistry, 241 . p. 113525. ISSN 0969-806X
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Abstract
Corrosion protection of metal surfaces can be significantly enhanced by nanocoatings derived from self- assembled molecular layers (SAMs) of fatty acids, which are subsequently crosslinked by gamma irradiation into polymer nanocoatings (PNCs). This study investigates how different SAM formation strategies influence the f inal protective performance of PNCs on copper, using two saturated fatty acids: short-chain caproic acid (C long-chain stearic acid (C 18 6 ) and ). Three distinct approaches to SAM formation were compared: single-component SAMs, co-assembled SAMs formed synergistically from C 6 :C by sequential deposition of C 6 followed by C 18 18 solutions in various ratios, and layered SAMs created . The coatings were characterized by contact angle and surface energy analysis, thermogravimetric analysis, and electrochemical methods including polarization measurements and electrochemical impedance spectroscopy (EIS). The results reveal that the SAM formation strategy has a pronounced impact on the resulting coating’s hydrophobicity, thermal stability, and corrosion resistance. Among the three approaches, layered coatings, particularly those formed by prolonged initial C 6 exposure followed by C 18 deposition, exhibited the highest performance, exceeding both single and co-assembled systems. This superior protective behavior is attributed to enhanced film uniformity and improved barrier integrity arising from optimized molecular layering. These findings underscore the importance of SAM assembly pathways in tailoring the structure–function relationship of gamma-crosslinked fatty acid nanocoatings for advanced metal protection.
| Item Type: | Article | ||||||||
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| Uncontrolled Keywords: | self-assembled molecular layers; fatty acids; ionizing radiation; radiation-crosslinking; corrosion resistance; protective coatings | ||||||||
| Subjects: | NATURAL SCIENCES > Chemistry > Applied Chemistry NATURAL SCIENCES > Interdisciplinary Natural Sciences > Radiation Science TECHNICAL SCIENCES > Chemical Engineering > Chemical Engineering in Material Development |
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| Divisions: | Division of Materials Chemistry | ||||||||
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| Depositing User: | Katarina Marušić | ||||||||
| Date Deposited: | 16 Dec 2025 13:03 | ||||||||
| URI: | http://fulir.irb.hr/id/eprint/10557 | ||||||||
| DOI: | 10.1016/j.radphyschem.2025.113525 |
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