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| 基于光子晶体的温度-角度双重响应性变色油墨的制备与性能 |
| Preparation and performance of temperature-angle dual-responsive color-changing ink based on photonic crystals |
| 投稿时间：2025-03-05 修订日期：2025-04-01 |
| DOI： |
| 中文关键词: 二氧化硅 光子晶体 微胶囊 多重响应性变色 |
| 英文关键词:silicon dioxide photonic crystals microcapsules multiple responsive color change |
| 基金项目:国家自然科学基金项目（22172194） |
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| 中文摘要: |
| 针对防伪领域对变色油墨多重响应性的需求,提出了一种基于三维光子晶体的温度-角度双响应热致变色油墨的制备方法。通过改进的St?ber法合成单分散二氧化硅微球(平均粒径为350 nm ± 15 nm,分布范围为300 nm~450 nm),并以其为光子晶体构建单元,结合热致变色微胶囊制备复合油墨。利用扫描电子显微镜(SEM)、色差分析及紫外-可见反射光谱等手段系统表征了油墨的微观形貌与光学性能。实验表明,所制备的油墨在30°、60°、90°观测角度下分别呈绿光(460 nm反射峰)、蓝光(550 nm反射峰)及无色状态,角度响应性显著；同时,在低温(-15℃)刺激下,油墨颜色转变为深红色,但仍保留角度依赖性变色功能。反射光谱与色差分析进一步证实,温度响应与角度响应机制可协同作用。为开发兼具高安全性、环境耐受性的动态防伪材料提供了新策略。 |
| 英文摘要: |
| Aiming at the demand for multiple responsiveness of color-changing inks in the anti-counterfeiting field, a preparation method of temperature-angle dual-responsive thermochromic inks based on three-dimensional photonic crystals is proposed. Monodisperse silica microspheres (with an average particle size of 350 nm ± 15 nm and a distribution range of 300 nm~450 nm) were synthesized by the improved St?ber method and used as photonic crystal building blocks to prepare composite inks in combination with thermochromic microcapsules. The microscopic morphology and optical properties of the inks were systematically characterized by means of scanning electron microscopy (SEM), chromatic aberration analysis and ultraviolet-visible reflectance spectroscopy. The experiments showed that the prepared inks exhibited green light (460 nm reflection peak), blue light (550 nm reflection peak) and colorless state at 30°, 60° and 90° observation angles, respectively, with significant angle responsiveness; meanwhile, under the stimulation of low temperature (-15℃), the color of the inks was changed to deep red, but still retained the angle-dependent color change function. Reflectance spectroscopy and color difference analysis further confirmed that the temperature response and angular response mechanisms can work in synergy. This provides a new strategy for the development of dynamic anti-counterfeiting materials with both high security and environmental tolerance. |
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