Preparation and properties of sol-gel modified flame retardant viscose fiber

被引：0
|
作者：
Ma J. [1 ,2 ]
Ge H. [2 ]
Wang D. [1 ]
Fu S. [1 ]
机构：
[1] Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education, Wuxi
[2] CHTC Helon (Weifang) New Materials Co., Ltd., Weifang
来源：
Fangzhi Xuebao/Journal of Textile Research | 2021年 / 42卷 / 01期
关键词：
Bisneopentyl glycol dithiopyrophosphate; Flame retardancy; Sol-gel method; Tetraethyl orthosilicate; Viscose fiber;
D O I：
10.13475/j.fzxb.20200606006
中图分类号：
学科分类号：
摘要：
In order to improve the flame-retardant properties of viscose/dithiopyrophosphate (VF/DDPS) fibers, the sol-gel technology was used to modify the VF/DDPS fiber surface via the hydrolysis of tetraethyl orthosilicate (TEOS). The structures and properties of the modified flame retardant viscose fibers (VF/DDPS/TEOS) were characterized by means of scanning electron microscope, X-ray photoelectron spectroscopy, thermogravimetric analyzer, cone calorimeter,micro combustion calorimeter, and single fiber strength analyzer. The results show that the flame retardancy of VF/DDPS/TEOS fiber was improved with the increase of char residues from 3.23% to 7.93% at 750℃. Moreover, the ignition time of VF/DDPS/TEOS fiber is extended from 4 s to 16 s, peak heat release rate and total heat release are decreased by 19.3% and 16.0% respectively, and limiting oxygen index is increased from 28.2% to 29.3%. The surface of VF/DDPS/TEOS fibers forms a dense silica protective film, and the silica significantly enhances the thermal and mass barrier of the carbon layer on the fiber surface during combustion. However, the breaking strength, elongation at break and hygroscopicity of the modified fiber are decreased. © 2021, Periodical Agency of Journal of Textile Research. All right reserved.
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页码：10 / 15
页数：5
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