多钒酸盐催化氧化咖啡酸及其对羊毛织物的原位染色性能  

Oxidation of caffeic acid and in⁃situ dyeing performance of wool fabrics catalyzed by polyoxovanadate

作　　者：梁志结 罗正智 程海兵 贾维妮[1] 毛庆辉[1] LIANG Zhijie;LUO Zhengzhi;CHENG Haibing;JIA Weini;MAO Qinghui(School of Textile and Clothing,Nantong University,Nantong,Jiangsu226019,China)

机构地区：[1]南通大学纺织服装学院,江苏南通226019

出　　处：《纺织学报》2023年第10期98-103,共6页Journal of Textile Research

基　　金：江苏省产学研合作项目(BY2022220)。

摘　　要：为实现纺织品无染料显色目的,以K_(7)[MnV_(13)O_(38)]·18H_(2)O为催化剂,以咖啡酸为底物,采用一步一浴法对羊毛织物进行原位染色。以织物K/S值为考察指标,研究了催化剂用量、反应时间、反应温度、pH值以及添加剂聚乙二醇对催化反应的影响。探讨出最佳的工艺条件:0.9 g咖啡酸,0.9 g聚乙二醇1000,pH值为4.0,0.19 g多钒酸盐,温度为50℃,催化染色反应时间为5 h。此外,通过红外光谱仪、紫外-可见分光光度计、扫描电镜等对染色前后织物的结构和染色性能进行了表征,同时测试了染色织物的耐摩擦和耐皂洗色牢度。结果表明,K_(7)[MnV_(13)O_(38)]·18H_(2)O对咖啡酸进行催化氧化,并对羊毛织物原位上染,染色织物K/S值达到20以上,颜色色相为黑色,染色后羊毛织物的耐干、湿摩擦色牢度及耐皂洗色牢度分别达到5级、4~5级及3级。Objective The green dyeing and finishing method has attracted a lot of attention.At present,the main technology used for in situ dyeing is biological enzyme method.However,the biological enzyme is generally expensive and the preservation condition is harsh,so it is important to find a new way to achieve dye-free dyeing for textile.In this work,the in situ catalytic dyeing of wool fabric was carried out by using K_(7)[MnV_(13)O_(38)]·18H_(2)O as catalyst and caffeic acid as substrate.Besides,the polymer was applied for wool in-situ dyeing to achieve coloring effect.Method The in-situ dyeing process was performed by one-step one-bath method.Factors such as reaction time,temperature,polyoxometalate concentration and pH value as well as the polyethylene glycol were studied for their effects on dyeing.Consequently,the dyeing property and structure of the dyed wool was characterized and analyzed by color parameter,color fastness test and fourier-transform infrared spectrum,scanning electron microscope,UV-vis spectrum,respectively.Results Based on the K/S value,the optimum conditions are obtained,namely,0.9 g caffeic acid,0.9 g polyethylene glycol 1000,pH=4.0 acetic acid-potassium acetate buffer,0.19 g polyoxometalate with temperature of 50℃and reaction time 5 h(Fig.4-7).The infrared spectra of polyoxometalate,caffeic acid,precipitations and dyed wool after dyeing reaction are contrasted(Fig.1).The peak at 958 cm^(-1) and the peaks in the range of 800-500 cm^(-1) for crystals indicate that the catalyst is synthesized successfully.After the reaction,a large amount of black precipitate was produced in the bottle.In contrast,the peaks in the range of 3600-2500 cm^(-1) indicate that the caffeic acid is polymerized after the reaction,and the polymer has strong hydrogen bond,while the peaks at 1264 cm^(-1),1086 cm^(-1) and 1023 cm^(-1) indicate the formation of ether bonds in polymer.Besides,there are broad peaks in the spectrum of dyed wool similar to precipitate in the range of 3600-3000 cm^(-1),and small peaks at 1210 c

关 键 词：多钒酸盐 咖啡酸 催化剂 氧化反应 染色 羊毛织物 

分 类 号：TS135.5[轻工技术与工程—纺织材料与纺织品设计]