Synthesis and Characterization of Nano-sized Zinc Oxide Coating on Cellulosic Fibers： Photoactivity and Flame-retardancy Study

• Published in: Chinese journal of chemistry Vol. 29; no. 6; pp. 1239 - 1245
• Main Author: Fallah, Moafi Hadi Fallah, Shojaie Abdollah Zanianchi, Mohammad Ali
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.06.2011; WILEY‐VCH Verlag; Wiley Subscription Services, Inc
• Subjects: cellulosic fiber; flame-retardancy; nanoparticle; photocatalytic self-cleaning; Scanning electron microscopy; sol-gel processes; Spectrum analysis; zinc oxide coating; Zinc oxides; 光催化剂; 氧化物涂层; 氧化锌纳米晶; 火焰蔓延; 纤维素纤维; 表征; 过氧化锌; 阻燃性
• ISSN: 1001-604X; 1614-7065
• DOI: 10.1002/cjoc.201190230

We have investigated the effect of zinc oxide as a photocatalyst and durable flame-retardant on cellulosic fibers. Zinc oxide nanocrystals were successfully synthesized and deposited onto cellulosic fibers using sol-gel process at low temperature. The samples were characterized by means of several techniques such as scanning electron microscopy, transmission electron microscopy, diffuse reflectance spectroscopy, X-ray diffraction and thermogra- vimetric analysis. The photocatalytic activity was tested by measuring the photodegradation of methylene blue under UV-Vis illumination. Moreover, flame-retardancy was tested by vertical flame spread test. The optimum add-on value for donating flame-retardancy onto cellulosic fabric was obtained to be in the range of 15.24 to 23.20 g of the ZnO per 100 g of fabric. Thermogravimetric analysis of pure and flame-retarded samples were accomplished and discussed. The results obtained are in agreement with Wall effect theory and Coating theory. The originality of this work on introducing photoactive flame-retarded fibers is highly valuable for industrial implementation.