Preparation of the colorful retroreflective film based on the polymer-stabilized cholesteric liquid crystal

IF 0.7 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY

Molecular Crystals and Liquid Crystals Pub Date : 2023-11-01 DOI:10.1080/15421406.2023.2274665

Yajie Yang, Jinghua Zhao, Wei Liu, Yi Li, Yonggang Yang

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Abstract

AbstractA cholesteric liquid crystal (CLC) mixture was prepared using a photoisomerizable chiral dopant and acrylates. With extending the irradiation time of a 365-nm UV light, the Bragg reflection band of the CLC mixture shifted to long wavelength. After photopolymerization, a polymer-stabilized CLC (PSCLC) film was obtained. The colorful PSCLC patterns with glass microspheres on the surface were prepared by controlling the competition between the photoisomerization of the chiral dopant and the photopolymerization of the acrylates. Due to the retroreflective property, the patterned PSCLC films can be applied as the traffic signs and for advertisement.Keywords: Colorful patternphotoisomerizationpolymer-stabilized cholesteric liquid crystalretroreflection Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThis work was supported by the National Natural Science Foundation of China (No. 52273212), the Project of Scientific and Technologic Infrastructure of Suzhou (SZS201905), the Key Laboratory of Polymeric Materials Design and Synthesis for Biomedical Function, and the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (20KJA430009).

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聚合物稳定胆甾液晶彩色反反射膜的制备

摘要采用光异构手性掺杂剂和丙烯酸酯制备了胆甾型液晶(CLC)混合物。随着365nm紫外光照射时间的延长，CLC混合物的Bragg反射带向长波长偏移。经光聚合后，获得了聚合物稳定的中尺度细胞肺癌(PSCLC)薄膜。通过控制手性掺杂剂的光异构化与丙烯酸酯的光聚合之间的竞争，制备了表面带有玻璃微球的彩色PSCLC图案。由于其具有逆反性，因此可以应用于交通标志和广告。关键词:彩色图案;光异构化;聚合物稳定胆甾液晶;项目资助:国家自然科学基金项目(No. 52273212)、苏州市科技基础建设项目(szs20105)、医用高分子材料设计与合成重点实验室、江苏省高校自然科学基金项目(20KJA430009)。

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来源期刊

Molecular Crystals and Liquid Crystals 化学-晶体学

CiteScore

1.20

自引率

14.30%

发文量

248

审稿时长

2 months

期刊介绍： Established in 1966, Molecular Crystals and Liquid Crystals is a world-leading journal publishing original research papers in both an experimental and theoretical nature in three areas of specialization: liquid crystals, molecular crystals, and low-dimensional solids. These cover, but are not limited to: Liquid Crystals: -Electro- and magneto-optical phenomena; thermodynamics; phase transitions; structure; NMR and orientation-controlled spectroscopy; theory. Molecular Crystals: -Spectroscopy; energy and charge transfer; solid state reactions; photo and radiation effects Low-dimensional Solids: -Structure, electronic, magnetic, and optical properties; transport mechanisms The journal publishes research papers, review papers, and book reviews. In all three areas, experimental manuscripts describing both preparation and properties will be considered. Papers that describe determination of crystal structure alone are not encouraged unless some solid state forces (hydrogen bonding, charge transfer, etc.) are playing a significant role and/or some solid state properties of the materials are measured.