纺织学报 ›› 2023, Vol. 44 ›› Issue (02): 184-190.doi: 10.13475/j.fzxb.20220807907

• 染整与化学品 • 上一篇    下一篇


肖明, 黄亮, 罗龙永, 毕曙光(), 冉建华   

  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
  • 收稿日期:2022-08-17 修回日期:2022-11-20 出版日期:2023-02-15 发布日期:2023-03-07
  • 通讯作者: 毕曙光(1978—),女,教授,博士。主要研究方向为功能材料/智能纺织品。E-mail:sgbi@wtu.edu.cn。
  • 作者简介:肖明(1997—),男,硕士生。主要研究方向为智能纺织品。
  • 基金资助:

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

XIAO Ming, HUANG Liang, LUO Longyong, BI Shuguang(), RAN Jianhua   

  1. Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing, Wuhan Textile University, Wuhan, Hubei 430200, China
  • Received:2022-08-17 Revised:2022-11-20 Published:2023-02-15 Online:2023-03-07


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。

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


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 and uniform in size, as shown in Fig. 5. The emission spectral wavelengths of fluorescent microspheres with different contents of fluorescent dyes measured by fluorescence spectrophotometer were all about 517 nm(Fig.4(b)), which was consistent with the emission wavelength of isothiocyanate fluorescent dyes(Fig.4(a)). The fluorescent microspheres were measured at different times (1-9 d) and pH values (3-11), which indicated that the prepared fluorescent microspheres had great fluorescence stability(Fig.4 (c) and (d)). The fluorescent fabric prepared by treating the fluorescent microspheres on silk, cotton and cotton/spandex fabric had no obvious phenomenon under ordinary light, but had bright yellow-green fluorescence under ultraviolet light (365 nm)(Fig.8). It was found that adding a small amount of water-based polyurethane aqueous solution could solve the problem that fluorescent microspheres were easy to fall off from the fabric. After hundreds of times of friction and a long time of washing, great fluorescence intensity was maintained(Fig. 9). After 400 times of friction and 30 min of washing, the fluorescence intensity still maintained at 81.8% and 85.7% of the original fluorescence intensity, demonstrating satisfactory color fastness to meet the requirement arising from transportation and storage in practical occasions.
Conclusion The preparation of carboxylated polystyrene fluorescent microspheres by electrostatic self-assembly method were easy to operate. The surface of the fluorescent microspheres was smooth, the particle size was relatively uniform, the fluorescence intensity was high, and the wavelength had an obvious emission peak at 517 nm, which was consistent with the emission wavelength of isothiocyanate fluorescent dye. Under different times and different pH value, the fluorescence stability was great, respectively treated in silk, cotton and cotton/spandex fabrics under ordinary light had no obvious change, but under ultraviolet light (365 nm) it was bright yellow-green, with obvious fluorescence anti-counterfeiting effect. Adding a small amount of aqueous polyurethane solution can improve the fluorescent microspheres treatment on the fabric easy to fall off the problem, providing a great performance. In conclusion, the carboxylated polystyrene fluorescent microspheres prepared in this research can meet the role of fluorescence pseudo-detection under different environments and different fabrics, and have broad application prospects and practical application value for fiber and fabric anti-counterfeit detection.

Key words: fabric anti-counterfeiting, carboxylated polystyrene microsphere, fluorescein isothiocyanate, cationic surfactant, electrostatic self-assembly, fluorescent microsphere


  • TS190
















不同织物分别在太阳光和紫外灯(365 nm) 下的数码照片"



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