Flame retardant and hydrophobic coatings on cotton fabrics via sol-gel and self-assembly techniques

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:505

Article

Zhang, Dongqiao^1,2,3  Williams, Brandon L.^2,3  Shrestha, Saral B.^2,3  Nasir, Zain^2,3  Becher, Elaina M.^2,3  Lofink, Benjamin J.^2,3  Santos, Victor H.^2,3  Patel, Harsh^2,3  Peng, Xiaohong¹  Sun, Luyi^2,3 

[1] South China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510640, Guangdong, Peoples R China

[2] Univ Connecticut, Inst Mat Sci, Dept Chem & Biomol Engn, Storrs, CT 06269 USA

[3] Univ Connecticut, Inst Mat Sci, Polymer Program, Storrs, CT 06269 USA

关键词: Cotton fabric;    Flame retardancy;    Hydrophobicity;    Montmorillonite;    Ammonium polyphosphate;    Vinyltrimethoxysilane;    Sol-gel;    Self-assembly;   

DOI  :  10.1016/j.jcis.2017.06.087

来源: Elsevier

【 摘 要 】

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. (C) 2017 Elsevier Inc. All rights reserved.

【 授权许可】

Free