羧基化聚苯乙烯荧光微球的合成及其在织物防伪中的应用  

Synthesis of carboxylated polystyrene fluorescent microspheres and its application in fabric anti-counterfeiting

作　　者：肖明 黄亮 罗龙永 毕曙光 冉建华[1] XIAO Ming;HUANG Liang;LUO Longyong;BI Shuguang;RAN Jianhua(Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing&Finishing,Wuhan Textile University,Wuhan,Hubei 430200,China)

机构地区：[1]武汉纺织大学生物质纤维与生态染整湖北省重点实验室,湖北武汉430200

出　　处：《纺织学报》2023年第2期184-190,共7页Journal of Textile Research

基　　金：盛虹·应急保障与公共安全用纤维材料及其制品科研攻关项目(2021-fx010302);湖北省科技厅科技指导项目(2021CFA034);国家自然科学基金项目(62101391)。

摘　　要：为解决防伪技术中荧光织物制备方法复杂和成本高的问题,采用分散聚合法制备表面带有负电荷的羧基化聚苯乙烯微球(CPS),再以阳离子表面活性剂十八烷基三甲基溴化铵为改性剂,利用静电自组装法吸附荧光染料异硫氰酸荧光素(FITC),制备羧基化聚苯乙烯荧光微球(CPS-FITC),最后将其负载于织物上制备荧光织物。结果表明:所制备的荧光微球和荧光织物在紫外灯(365 nm)下具有明亮的黄绿色荧光,且放置不同时间(1~9 d)、在不同的pH值(3~11)下,经多次摩擦和水洗后均能保持良好的荧光稳定性。该制备方法操作简便、成本低且荧光强度高,可用于不同织物的防伪检测。Objective In order to address the complexity in preparation and high cost for current fabric based anti-counterfeiting technology, carboxylated polystyrene fluorescent microspheres were synthesized and loaded on fabric for anti-counterfeiting application. The fluorescent microspheres prepared by this paper have great anti-counterfeiting effect on different types of fabrics, offering obvious practical value for curbing fake products and for improving the economic value of fabric and clothing brands.Method Carboxylated polystyrene fluorescent microspheres with negative surface charges were prepared at 80 ℃ by copolymerization of styrene and acrylic acid as reactive monomer, polyvinylpyrrolidone as stabilizer, azo diisobutyronitrile as initiator, deionized water and ethanol as solvent. The cationic surfactant octagyltrimethyl ammonium bromide was used as the modifier, and the fluorescent dye fluorescein isothiocyanate was adsorbed by electrostatic self-assembly method to prepare carboxylated polystyrene fluorescent microspheres with yellow-green fluorescence. The microspheres were loaded on different fabrics to produce fabrics with anti-counterfeiting function.Results Fluorescent microspheres with different contents of fluorescent dyes were successfully prepared by electrostatic self-assembly method. The fluorescent microspheres were measured by Fourier infrared spectrometer and all contained isothiocyanate characteristic functional groups at 2 036 cm-1(Fig. 3). With the increase of the content of fluorescent dye isothiocyanate, the surface negative charge value and particle size was gradually increased. When the content of fluorescent dye isothiocyanate was 10% of the carboxylated polystyrene microspheres, the surface charge was-22.1 mV and the particle size was about 1 406.0 nm(Fig. 2 and Fig. 6). The surface morphology of fluorescent microspheres with different contents of fluorescent dyes was observed by scanning electron microscopy, which showed that the surface of the microspheres was smooth, monodisperse an

关 键 词：织物防伪 羧基化聚苯乙烯微球 异硫氰酸荧光素 阳离子表面活性剂 静电自组装 荧光微球 

分 类 号：TS190[轻工技术与工程—纺织化学与染整工程]