Flame retardant and hydrophobic coatings on cotton fabrics via sol-gel and self-assembly techniques
| Autor: | Victor H. Santos, Xiaohong Peng, Elaina M. Becher, Dongqiao Zhang, Luyi Sun, Saral B. Shrestha, Brandon L. Williams, Zain Nasir, Benjamin J. Lofink, Harsh Patel |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Thermogravimetric analysis
Materials science Flame test 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Limiting oxygen index Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry Montmorillonite Coating chemistry Chemical engineering Attenuated total reflection Polymer chemistry engineering 0210 nano-technology Ammonium polyphosphate Fire retardant |
| Zdroj: | Journal of Colloid and Interface Science. 505:892-899 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2017.06.087 |
| Popis: | Nanocoatings consisting of ammonium polyphosphate (APP), sodium montmorillonite (MMT), and vinyltrimethoxysilane (VTMS) were prepared via self-assembly and in situ sol-gel techniques and applied onto cotton fabrics to achieve both flame retardancy and hydrophobicity. The impacts of APP concentration on the hydrophobicity and fire resistance of the coated fabrics were investigated. Attenuated total reflectance Fourier transform infrared (ATR-FTIR) characterization results verified the hydrolysis-condensation reaction of VTMS and the formation of Si-O-Si network structure. X-ray diffraction (XRD) proved the formation of a layered structure based on MMT nanosheets in the coatings. Both vertical flame test (VFT), limiting oxygen index (LOI), thermogravimetric analysis (TGA) and microscale combustion calorimeter (MCC) characterization were conducted to evaluate the flame retardancy, thermostability and heat release behavior of the coated cotton fabrics, respectively. The results suggested that a higher concentration of APP is beneficial for both hydrophobicity and flame retardancy of the coated substrates. Overall, our research provides a facile and very effective approach to prepare flame retardant and hydrophobic multifunctional coating for cotton fabric and other substrates. |
| Databáze: | OpenAIRE |
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