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Open AccessArticle

Dual-Layer Approach toward Self-Healing and Self-Cleaning Polyurethane Thermosets

School of Packaging, Michigan State University, 448 Wilson Road, East Lansing, MI 48824-1223, USA
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Polymers 2019, 11(11), 1849; https://doi.org/10.3390/polym11111849
Received: 8 September 2019 / Revised: 4 November 2019 / Accepted: 7 November 2019 / Published: 9 November 2019
(This article belongs to the Special Issue Polymeric Self-Healing Materials)
There is an urgent need for coatings that exhibit both self-healing as well as self-cleaning properties as they can be used for a wide range of applications. Herein we report a novel approach toward fabricating polyurethane thermosets possessing both self-cleaning and self-healing properties. The desired coating was achieved via casting a bottom layer of self-healable polyurethanes comprised of reversible phenolic urethane bonds followed by a subsequent dip-coating of the prepared layer in a solution of bis(3-aminopropyl)-terminated polydimethylsiloxane (PDMS-NH2). The PDMS was used to impart self-cleaning properties to the coating. While the self-healing behavior of the bottom polyurethane layer is achieved through phenolic urethane chemistry, via the exchange of phenolic urethane moieties. The prepared coatings were tested for their optical, mechanical, self-healing, and self-cleaning properties using a variety of characterization methods, which confirmed the successful fabrication of novel self-cleaning and self-healing clear urethane coatings. View Full-Text
Keywords: polyurethanes; propyl gallate; sustainable materials; self-healing; self-cleaning surfaces; durability polyurethanes; propyl gallate; sustainable materials; self-healing; self-cleaning surfaces; durability
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MDPI and ACS Style

Naveed, M.; Rabnawaz, M.; Khan, A.; Tuhin, M.O. Dual-Layer Approach toward Self-Healing and Self-Cleaning Polyurethane Thermosets. Polymers 2019, 11, 1849.

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