| 摘要: |
| 目的 介绍纤维素纳米晶（Cellulose Nanocrystal，CNC）手性向列液晶的形成原理与特征，以及该结构的调控方法，包括螺距和折射率的调控，最后总结纤维素纳米晶及其衍生材料在颜色防伪中的应用。方法 归纳CNC手性向列液晶的形成机理方法，如硫酸水解结合蒸发诱导自主装法以及以CNC为手性模板与其他溶液共混制备法。最后总结国内外CNC手性向列液晶在颜色防伪中的研究现状，并简要讨论纤维素纳米晶在颜色防伪的未来发展趋势。结论 纤维素纳米晶，具有绿色环保、来源丰富、合成工艺简单等特点，在一定条件下能形成手性向列液晶结构，具有独特的光学性质并呈现出结构色,可应用于颜色防伪。 |
| 关键词: 纤维素纳米晶 手性向列 颜色防伪 |
| DOI：10.19554/j.cnki.1001-3563.2019.23.013 |
| 分类号:O636.1+1 |
| 基金项目:天津市自然科学基金（18JCQNJC76800）；天津市教委科研计划（2018KJ096, 2018KJ095） |
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| Application of Cellulose Nanocrystal Chiral Nematic Liquid Crystal in Color Anti-counterfeiting |
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HUANG Wei-jie, GAO Meng, ZHANG Zheng-jian, CHEN Yun-zhi
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College of Packaging and Printing Engineering, Tianjin University of Science & Technology, China Light Industry Key Lab of Food Packaging Materials and Technology, Tianjin 300222, China
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| Abstract: |
| The work aims to introduce the formation principle and characteristics of cellulose nanocrystal (CNC) chiral nematic liquid crystal, as well as the control methods of the structure, including the control of pitch and refractive index, and finally summarize the application of cellulose nanocrystal and its derivatives in color anti-counterfeiting. The formation mechanism and methods of CNC chiral nematic liquid crystal were summarized, such as sulfuric acid hydrolysis combined with evaporation induced self loading method and the preparation method of CNC as chiral template mixed with other solutions. Finally, the research status of CNC chiral nematic liquid crystals in color anti-counterfeiting at home and abroad was summarized, and the future development trend of cellulose nanocrystals in color anti-counterfeiting was briefly discussed. Cellulose nanocrystals are characterized by environmental protection, rich sources and simple synthesis process. They can form chiral nematic liquid crystal structure under certain conditions, have unique optical properties and show structural color, and can be used in color anti-counterfeiting. |
| Key words: cellulose nanocrystals chiral nematic, color anti-counterfeiting |
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