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Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Prolonged Lifespan of Superhydrophobic Thin Films and Coatings Using Recycled Polyethylene

Version 1 : Received: 18 May 2024 / Approved: 20 May 2024 / Online: 20 May 2024 (16:03:01 CEST)

How to cite: Saleem, J.; Moghal, Z. K. B.; McKay, G. Prolonged Lifespan of Superhydrophobic Thin Films and Coatings Using Recycled Polyethylene. Preprints 2024, 2024051237. https://doi.org/10.20944/preprints202405.1237.v1 Saleem, J.; Moghal, Z. K. B.; McKay, G. Prolonged Lifespan of Superhydrophobic Thin Films and Coatings Using Recycled Polyethylene. Preprints 2024, 2024051237. https://doi.org/10.20944/preprints202405.1237.v1

Abstract

High-density polyethylene (HDPE) waste poses a significant environmental challenge due to its non-biodegradable nature and the vast quantities generated annually. However, conventional recycling methods are energy-intensive and often yield low-quality products. Herein, HDPE waste is upcycled into anti-aging superhydrophobic thin films suitable for outdoor applications. A two-layer spin-casting method combined with heating-induced crosslinking is utilized to produce an exceptionally rough superhydrophobic surface, featuring a root mean square (RMS) roughness of 50 nm, an average crest height of 222 nm, an average trough depth of –264 nm, and a contact angle (CA) of 148°. To assess durability, weathering tests were conducted, revealing the films' susceptibility to degradation under harsh conditions. The films' resistance to environmental factors is improved by incorporating a UV absorber, maintaining their hydrophobic properties and mechanical strength. Our research demonstrates a sustainable method for upcycling waste into high-performance, weather-resistant superhydrophobic films.

Keywords

superhydrophobic; anti-aging; surface roughness; weather-resistant; films

Subject

Chemistry and Materials Science, Polymers and Plastics

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