| 摘要: |
| 目的 制备环保、适用范围广的温变转色防伪油墨。方法 利用隐色染料（热敏黑）、显色剂（双酚A）及溶剂（十四醇）组成可逆温变转色复配物，然后用原位聚合法对复配物进行微胶囊包覆，最后将微胶囊加入UV连接料体系中制成可逆温变转色UV油墨，分析油墨的色度学特性。结果 当乳化转速为16 000 r/min、pH值为2～3、乳化温度为45 ℃、乳化时间为30～40 min时，微胶囊粒径较小，显色效果较好。对该可逆温变转色UV油墨样品进行CIE-Lab色度学特性分析，在整个加热/冷却循环后，温变转色油墨又回到初始明度值，油墨样品明度发生滞后现象，整个过程中样品的明度值形成一个闭环的回路。结论 该法制备的可逆温变转色油墨具有检测方便、变色效果明显等优点，在包装防伪印刷中具有广阔的应用前景。 |
| 关键词: 可逆温变转色 微胶囊 UV油墨 变色特性 |
| DOI： |
| 分类号:TS802.3 |
| 基金项目:浙江省大学生科技创新活动计划（新苗人才计划）（2016R476005）；义乌工商职业技术学院横向课题（2015005）；义乌工商职业技术学院印刷媒体技术研究中心支持项目 |
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| Colorimetric Properties of Reversible Thermo Chromic UV Ink |
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SONG Ci1,2, TONG Sheng-zhi3, LYU Yong3, YU Yu-sheng4
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1.Yiwu Industrial & Commercial College, Yiwu 322000, China;2. Shenzhen Zhencai Yali Technology Co., Ltd., Shenzhen 518106, China;3.Yiwu Industrial & Commercial College, Yiwu 322000, China;4.Shenzhen Zhencai Yali Technology Co., Ltd., Shenzhen 518106, China
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| Abstract: |
| The work aims to prepare the environmentally-friendly thermo-chromic anti-counterfeit ink with extensive application scope. The reversible thermo-chromatic compound was prepared with leuco dye (thermosensitive black), developer (Bisphenol A) and solvent (tetradecyl alcohol), and then the microcapsule was covered through in-situ polymerization. Finally, the microcapsules were added to UV system of binders to prepare the reversible thermo-chromic UV inks and analyze the colorimetric properties of ink. The microcapsule grain size was smaller and the color developing effect was better when the emulsification speed was 16 000 r/min, pH value of 2～3, emulsification temperature of 45 ℃ and emulsification time of 30～40 min. The CIE-Lab colorimetric properties of the reversible thermo-chromatic UV ink samples were analyzed. After the whole heating/cooling circle, the lightness (L*) of the ink was changed back to the original value and the lightness change of the ink was delayed. In the whole process, the lightness values of samples were formed as a closed loop. The reversible thermo-chromic ink prepared in such method characterized by convenient detection and significant color change effect, etc. has broad application prospects. |
| Key words: reversible thermochochromic microcapsule UV ink colorimetric properties |
