Hydrophobic coating made of natural seed oil and organic wax for wood and steel

Abstract

The purpose of the study is to develop a hydrophobic natural solution as an alternative coating material for wood and steel substrates. The study uses Moringa seed oil, Tarap seed oil, and Soy wax to create a natural hydrophobic coating solution that can prevent water infiltration while at the same time being free from harmful chemicals. Using the mixture of Moringa Oil, Tarap Oil, and Soy wax, the wood and steel substrates were dip. coated and cured for seven (7) days. The heat treatment method was then used to determine if there was any improvement to the Water Contact Angle (WCA) of both Wood and Steel substrates. After the series of tests, it has been found that half of the wood samples with salt templating shows sign of hydrophobization, precisely, Wax Coating (90.72° ± 5.12°), War-Moringa Coating (90.47° ± 1.42°), Wax-Tarap Coating (101.98° ± 5.18°), Wax-Moringa-Tarap (2:2:1) Coating (90.77° ± 3.53°), and Wax-Moringa- Tarap (2:1:2) Coating (91.98° ± 6.38°). It implies that using salt templating as a surface fabrication effectively increases the WCA of the surface. Also, the wood samples without salt templating (Tarap Coating, Wax-Tarap Coating, and Wax-Moringa-Tarap (2:2:1) Coating) have achieved a hydrophobic level of water contact angle after the heat treatment from 85.59°, 85.31°and 82.62° to 90.96°, 90.35°, and 90.11', respectively. Furthermore, most of the steel samples did not reach a hydrophobic level but still showed a more significant percent increase of WCA after heat treatment of 11.635% than the wood samples of 6.18%, which signifies that the heat treatment is more effective and offers more heat resistance in steel substrates than in wood. Thus, the combination of Moringa seed oil, Tarap seed oil, and Soy wax is effective in creating a hydrophobic bio-based oil product for wood and steel applications.