Self-Protecting Epoxy Coatings with Anticorrosion Microcapsules.

Autor:	Odarczenko M; Aerospace Engineering, University of Illinois, 104 S. Wright Street, Urbana, Illinois 61801, United States.; Beckman Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United States., Thakare D; Mechanical Engineering, University of Illinois, 1206 W. Green Street, Urbana, Illinois 61801, United States.; Beckman Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United States., Li W; Material Science and Engineering, University of Illinois, 1304 W. Green Street, Urbana, Illinois 61801, United States.; Beckman Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United States., Yang K; Material Science and Engineering, University of Illinois, 1304 W. Green Street, Urbana, Illinois 61801, United States.; Beckman Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United States., Tang S; Material Science and Engineering, University of Illinois, 1304 W. Green Street, Urbana, Illinois 61801, United States.; Beckman Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United States., Venkateswaran SP; Upstream Engineering Centre, BP America, Houston, Texas 77079, United States., Sottos NR; Material Science and Engineering, University of Illinois, 1304 W. Green Street, Urbana, Illinois 61801, United States.; Beckman Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United States., White SR; Aerospace Engineering, University of Illinois, 104 S. Wright Street, Urbana, Illinois 61801, United States.; Beckman Institute for Advanced Science and Technology, University of Illinois, 405 N. Matthews Avenue, Urbana, Illinois 61801, United States.
Jazyk:	angličtina
Zdroj:	ACS omega [ACS Omega] 2018 Oct 25; Vol. 3 (10), pp. 14157-14164. Date of Electronic Publication: 2018 Oct 25 (Print Publication: 2018).
DOI:	10.1021/acsomega.8b01950
Abstrakt:	The corrosion of steel substrates causes damage that is costly to repair or replace. Current protective coatings predominately rely on environmentally harmful anticorrosive agents and toxic solvents to protect the underlying substrate. The use of lawsone (2-hydroxy-1,4-napthoquinone) together with a water-based epoxy coating provides an environmentally friendly alternative for common protective coatings. Microencapsulated lawsone embedded in an epoxy coating allows the anticorrosive agent to remain dormant until released by damage and delivered directly onto the steel substrate. UV-vis analysis confirms successful encapsulation of lawsone in a polyurethane shell wall and reveals up to 8 wt % lawsone in the capsule cores. Uniform dry film thickness and inflicted damaged are verified with ultrasound and optical microscopy. Visual and electrochemical analysis demonstrates that this self-protective scheme leads to a 70% corrosion inhibition efficiency in a neutral salt water solution. Competing Interests: The authors declare no competing financial interest.
Databáze:	MEDLINE
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