期刊
APPLIED SURFACE SCIENCE
卷 427, 期 -, 页码 69-80出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.08.021
关键词
Silk; Phytic acid; Silica; Sol-gel; Flame retardancy; Hydrophobicity
类别
资金
- Jiangsu Provincial Key Research and Development Program of China [BE2015066]
- Suzhou Science and Technology Support Program [SS201422]
- Research Innovation Program for College Graduates of Jiangsu Province [KYCX17_1986]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions [2014-37]
In this work, a novel phosphorus-rich hybrid organic-inorganic silica coating for improving the flame retardancy of silk fabric was prepared using naturally occurring phytic acid as phosphorus precursor and catalyst for the hydrolysis of tetraethoxysilane. In addition, three silane coupling agents, namely 3-aminopropyldimethoxymethylsilane, 3-chloropropyltrimethoxysilane and 3-methacryloxypropyltrimethoxysilane, were added in the hybrid sol as cross-linkers with the aim of developing hydrophobic coatings and improving the washing durability of the treated silk fabric. The condensation degree of the hybrid sol was characterized by solid-state Si-29 nuclear magnetic resonance spectroscopy. The flammability and thermal degradation properties of the treated silk fabrics were determined in terms of limiting oxygen index, vertical burning, pyrolysis combustion flow calorimetry and thermogravimetric analyses. The surface morphology and hydrophobicity of the treated silk fabrics were evaluated by scanning electron microscopy, atomic force microscopy and water contact angle tests. The flammability tests revealed that the silicon sol could endow silk fabric with excellent flame retardancy when doped with phytic acid, and the treated silk fabrics self-extinguished immediately when the ignition source was removed. The silk fabrics treated with the modified hybrid sols exhibited hydrophobic surface and also better durability to washing. (C) 2017 Elsevier B.V. All rights reserved.
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