期刊
APPLIED SURFACE SCIENCE
卷 421, 期 -, 页码 52-60出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2017.01.283
关键词
Silk; Sol-gel; Flame retardancy; Nitrogen; Boron; Silica; Ternary sol system
类别
资金
- Natural Science Foundation of Jiangsu Province [BK20151242]
- Six Talent Peaks Project of Jiangsu Province [JNHB-066]
- China Postdoctoral Science Foundation [2016M600437]
- Jiangsu Planned Projects for Postdoctoral Research Research Funds [1601025B]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Qing Lan Project
A ternary flame retardant sol system containing Si, B and N was prepared via sol gel method using tetraethoxysilane (TEOS) as a precursor, boric acid (H3BO3) and urea (CO(NH2)(2)) as flame retardant additives and then applied to silk fabric flame retardant finish. The FT-IR and SEM results showed that the nitrogen-boron-silica ternary sol was successfully prepared and entrapped onto the surface of silk fibers. The limiting oxygen index (LOI) test indicated that the silk fabric treated with 24% boric acid and 6% urea (relative to the TEOS) doped ternary silica sol system performed excellent flame retardancy with the LOI value of 34.6%. Furthermore, in order to endow silk fabric with durable flame retardancy, the silk fabric was pretreated with 1,2,3,4-butanetetracarboxylic acid (BTCA) before the ternary sol system treatment. The BTCA pretreat ment applied to silk could effectively promote the washing durability of the ternary sol, and the LOI value of the treated sample after 10 times washing could still maintain at 30.8% compared with that of 31.0% before washing. Thermo gravimetric (TG), micro calorimeter combustion (MCC) and smoke density test results demonstrated that the thermal stability, heat release and smoke suppression of the nitrogen-boron-silica ternary system decreased somewhat compared with the boron-silica binary flame retardant system. (C) 2017 Elsevier B.V. All rights reserved.
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