Self-healing and self-cleaning clear coating

A Khan, K Huang, MG Sarwar, K Cheng, Z Li… - Journal of Colloid and …, 2020 - Elsevier
Journal of Colloid and Interface Science, 2020Elsevier
Coatings exhibiting both self-cleaning and self-healing properties are envisioned for a wide
range of applications. Herein we report a simple fabrication approach toward poly (urea-
urethane)(PU) coatings having self-healing and self-cleaning properties. The self-cleaning
component is a poly (dimethylsiloxane)(PDMS), which is affordable in cost and also has a
lower environmental footprint relative to its fluorinated counterpart. The self-healing
properties are imparted by dynamic urea bonds of the matrix. The obtained surfaces are …
Abstract
Coatings exhibiting both self-cleaning and self-healing properties are envisioned for a wide range of applications. Herein we report a simple fabrication approach toward poly(urea-urethane) (PU) coatings having self-healing and self-cleaning properties. The self-cleaning component is a poly(dimethylsiloxane) (PDMS), which is affordable in cost and also has a lower environmental footprint relative to its fluorinated counterpart. The self-healing properties are imparted by dynamic urea bonds of the matrix. The obtained surfaces are evaluated for their anti-smudge properties such as water-, oil- and ink-repellency, as well as optical properties. The self-healing properties of these coatings are evaluated by making scores with a doctor blade and monitoring the healing under different conditions using optical microscopy. The resultant coatings are also investigated for their good mechanical properties. The surface chemical compositions are determined x-ray photoelectron spectroscopy, while atomic force microscopy is used for microstructural analysis of these coatings.
Elsevier
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