Chen Liangzhe, Hu Biao, Zhang Jieyu, Zhang Jinmei, Huang Shuting, Ren Ping, Zou Yang, Ding Fuyuan, Liu Xinghai, Li Houbin
School of Printing and Packaging, Wuhan University Wuhan 430072 P. R. China
RSC Adv. 2019 Jan 2;9(1):476-481. doi: 10.1039/c8ra09106d. eCollection 2018 Dec 19.
In this work, 1,3,6,8-pyrenesulfonic acid sodium salt (PTSA) was successfully synthesized a one-step sulfonating reaction. This method is more convenient, effective and eco-friendly than the traditional one. The as-prepared PTSA exhibits pure blue fluorescence under UV light. Due to its excellent fluorescent properties and water solubility, PTSA was used to prepare water-soluble invisible inks based on hydroxyethyl cellulose (HEC) aqueous solution. Notably, the resulting inks possessed acceptable stability after being stored for 30 days. Besides, the red/green/blue fluorescent inks were obtained by adding extra pigments, all of which exhibited excellent rheology and thixotropy properties. Subsequently, various patterns, including a QR code, the logo of Wuhan University, Chinese characters and so on, were printed on non-background paper through ink-jet and screen printing, and the as-prepared materials exhibited good water solubility and outstanding fluorescence performances, indicating that the fluorescent PTSA material is a promising candidate for anti-counterfeiting applications.
在本工作中，通过一步磺化反应成功合成了1,3,6,8-芘四磺酸钠盐（PTSA）。该方法比传统方法更简便、有效且环保。所制备的PTSA在紫外光下呈现纯蓝色荧光。由于其优异的荧光性能和水溶性，PTSA被用于基于羟乙基纤维素（HEC）水溶液制备水溶性隐形墨水。值得注意的是，所得墨水在储存30天后仍具有可接受的稳定性。此外，通过添加额外的颜料获得了红/绿/蓝荧光墨水，所有这些墨水均表现出优异的流变学和触变性。随后，通过喷墨和丝网印刷在非背景纸上印制了各种图案，包括二维码、武汉大学校徽、汉字等，所制备的材料表现出良好的水溶性和出色的荧光性能，表明荧光PTSA材料是防伪应用的有前途的候选材料。
