双氧水尿素降解PVA及其在轧蒸退浆中的应用  

PVA Degradation with Hydrogen Peroxide Carbamide and Its Application in Pad-steam Desizing

作　　者：单巨川[1] 张莹 郑庆康[3] SHAN Juchuan ZHANG Ying ZHENG Qingkang(Hebei University of Science ＆ Technology, Hebei Shijiazhuang, 050018 Shaanxi Textile Science Institute, Shaanxi Xi＇an, 710038 Sichuan University,Sichuan Chengdu, 610065)

机构地区：[1]河北科技大学,河北石家庄050018 [2]陕西省纺织科学研究院,陕西西安710038 [3]四川大学,四川成都610065

出　　处：《棉纺织技术》2017年第8期43-46,共4页Cotton Textile Technology

基　　金：河北省科技厅项目(16214016)

摘　　要：采用双氧水-尿素活化氧化体系对PVA进行降解,并对涤棉织物进行轧蒸退浆处理,探讨了双氧水用量、温度、时间和pH值对PVA降解率、降解产物黏度的影响以及双氧水用量、汽蒸时间对退浆后织物上PVA降解率和织物白度、毛效、强力的影响。结果表明:降解1g/LPVA的较优工艺条件为双氧水20mL/L,双氧水与尿素的质量比0.6,降解温度90℃,降解时间20min,pH值5;轧蒸退浆的较优工艺条件为双氧水60mL/L,汽蒸时间30min;经优化工艺退浆后织物上PVA降解率达96%,织物白度和毛效有所提高,强力损伤不大。Hydrogen peroxide-carbamide active oxidation system was adopted to degrade PVA. And the poly- ester cotton fabric was treated by pad-steam desizing. The influence of hydrogen peroxide dosage, temperature, time and pH value on PVA degradation rate and the viscosity of degradation product and the influence of hydro- gen peroxide dosage, steaming time on the PVA degradation rate, fabric whiteness, capillary effect and strength of fabrics after desizing were discussed. The results showed that the optimized technology condition to degrade 1 g/L PVA is 20 mL/L hydrogen peroxide,0.6 for the mass ratio of hydrogen peroxide and carbamide,90℃ as the deg- radation temperature,20 min for time and 5 as pH value. The optimized technology condition for pad-steam desizing is 60 mL/L hydrogen peroxide and 30 min steaming time. The PVA degradation rate for the fabric after desizing with optimized process is up to 96%. The fabric whiteness and capillary effect are improved while the strength loss is minor.

关 键 词：退浆 双氧水 聚乙烯醇 涤棉织物 活化剂 

分 类 号：TS192.52[轻工技术与工程—纺织化学与染整工程]