Liquefied-Wood-Based Polyurethane–Nanosilica Hybrid Coatings and Hydrophobization by Self-Assembled Monolayers of Orthotrichlorosilane (OTS)
| Autor: | Matjaž Pavlič, Jure Žigon, Marko Petrič, Andrijana Sever Škapin, Jan Tywoniak, Anuj Kumar, Petr Hajek, Borut Kričej |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Thermogravimetric analysis
Materials science Renewable Energy Sustainability and the Environment Scanning electron microscope General Chemical Engineering Energy-dispersive X-ray spectroscopy Self-assembled monolayer General Chemistry engineering.material Contact angle chemistry.chemical_compound chemistry Coating Chemical engineering Polymer chemistry engineering Environmental Chemistry Fourier transform infrared spectroscopy Polyurethane |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 3:2533-2541 |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.5b00723 |
| Popis: | We have produced hybrid liquefied-wood-based polyurethane (LW-PU) and LW-PU/nanosilica hybrid coatings for wood substrates. The prepared hybrid polyurethane coatings were hydrophobized by self-assembled monolayers of orthotrichlorosilane (OTS) via a sol–gel dipping process. The nanosilica addition into the LW-PU system enhanced the physical properties of coatings like surface hardness and stability toward cold liquids. The OTS hydrophobized coatings were characterized by Fourier transforms infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and thermogravimetric analysis (TGA). The surface became hydrophobic as the contact angle (CA) for the water droplet on a modified hybrid coating was ∼115° and very stable. The FTIR, SEM, and EDS analysis confirmed the formation of OTS monolayers on hybrid coatings. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|