Choi Su Jeong, Seo Eun Jeong, Bae Hyoung Eun, Jung Hyo Cheol, Lee Sang Ho, Kim Jin Chul, Jung Yu Jin, Park Jong S, Jeong Ji-Eun, Park Young Il
Research Center for Green Fine Chemicals, Korea Research Institute of Chemical Technology Ulsan 44412 Republic of Korea
Department of Organic Material Science and Engineering, Pusan National University Busan 46241 Republic of Korea.
RSC Adv. 2024 Jan 23;14(5):3560-3566. doi: 10.1039/d3ra06965f. eCollection 2024 Jan 17.
Anti-counterfeiting (ACF) technology plays a crucial role in distinguishing genuine products from counterfeits, as well as in identity verification. Moreover, it serves as a protective measure for safeguarding the rights of individuals, companies, and governments. In this study, a high-level ACF technology was developed using a color-conversion system based on the photothermal effect of near-infrared (NIR) wavelengths. Diimonium dye (DID), which is a photothermal dye, was selected because it is an NIR absorbing dye with over 98% transparency in the visible light (vis) region. Due to the photothermal properties of DID, the temperature increased to approximately 65 °C at 1064 nm and 39 °C at 808 nm, respectively. Additionally, we employed a donor-acceptor Stenhouse adduct dye, a thermochromic dye, which exhibits reversible color change due to heat (red color) and light (colorless). Our ACF technology was applied to the brand-protecting fiber utilizing the difference in photothermal temperature according to the NIR wavelength. We successfully implemented anti-counterfeit clothing using alphabet K labels that could distinguish between genuine and counterfeit products by irradiating with specific NIR wavelengths.
防伪（ACF）技术在区分正品与假冒产品以及身份验证方面发挥着关键作用。此外，它还作为一种保护措施，用于保障个人、公司和政府的权益。在本研究中，基于近红外（NIR）波长的光热效应，利用颜色转换系统开发了一种高级ACF技术。选择了作为光热染料的二亚胺鎓染料（DID），因为它是一种在可见光（vis）区域具有超过98%透明度的近红外吸收染料。由于DID的光热特性，在1064 nm处温度分别升高到约65°C，在808 nm处升高到39°C。此外，我们还使用了一种供体-受体斯滕豪斯加合物染料，一种热致变色染料，它会因热（红色）和光（无色）而呈现可逆的颜色变化。我们的ACF技术利用近红外波长下光热温度的差异应用于品牌保护纤维。我们成功地使用字母K标签制作了防伪服装，通过用特定的近红外波长照射，可以区分正品和假冒产品。
