Application of urea/H2O2 activation-oxidation system in degradation of PVA and desizing of polyester/cotton fabric

• Published in: Journal of applied polymer science Vol. 113; no. 2; pp. 860 - 867
• Main Authors: Shan, Juchuan, Guan, Yu, Zheng, Qingkang, Han, Jinshi, Liu, Qingshu, Pu, Zhongyao
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 15.07.2009; Wiley
• Subjects: activation-oxidation system; Applied sciences; Aqueous solutions; Cotton; Degradation; Desizing; Differential scanning calorimetry; Exact sciences and technology; Fabrics; Fibers and threads; Forms of application and semi-finished materials; polyester/cotton fabrics; Polymer industry, paints, wood; Polyvinyl alcohols; PVA; Technology of polymers; Ureas; Hydrogen peroxide; Textile oiling; Ester polymer; Synthetic fiber; Plant fiber; degradation; Cotton; Experimental study; Property processing relationship; Polyvinylalcohol; Urea; Bleaching; Chemical treatment; Natural fiber; Oxidative degradation; Concentration effect; Reaction mechanism; activation-oxidation system; Fenton reaction; PVA; Woven material; polyester/cotton fabrics; Textile finishing; Whiteness
• DOI: 10.1002/app.29966
• ISSN: 0021-8995; 1097-4628

The viscosity and the UV–vis spectrum of PVA degradation aqueous solutions, the FTIR, and DSC spectrums of degradation products were measured to investigate and compare the effect of Fenton's reagent and urea/H2O2 activate oxidation systems on the degradation of PVA. The results showed that the viscosity of PVA aqueous solution decreased and the degradation rate of PVA increased with the concentration of hydrogen peroxide in both activate oxidation systems. The FTIR and DSC spectrum of degradation products showed that the degradation products contained aldehyde, ketone groups. The aldehyde compounds and carbon dioxide produced in the degradation systems were validated by Fehling reagents and clarifying limewater. When the urea/H2O2 system was applied in the one‐bath and one‐step desizing and scouring process of polyester/cotton 65/35 fabric, the results of 94.7% degradation rate of PVA, the 99.0% desizing rate of PVA, the whiteness, and wicking height of the fabric were obtained. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009