手性向列型纤维素纳米晶体薄膜与氨基酸协同作用以实现可调光学性质
Chiral Nematic Cellulose Nanocrystal Films Cooperated with Amino Acids for Tunable Optical Properties.
作者信息
Xiao Xiao, Chen Jie, Ling Zhe, Guo Jiaqi, Huang Jianbin, Ma Jianfeng, Jin Zhi
机构信息
Key Lab of Bamboo and Rattan Science & Technology, International Center for Bamboo and Rattan, Beijing 100102, China.
Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
出版信息
Polymers (Basel). 2021 Dec 15;13(24):4389. doi: 10.3390/polym13244389.
The exploration of functional materials relies greatly on the understanding of material structures and nanotechnologies. In the present work, chiral nematic cellulose nanocrystal (CNC) films were prepared by incorporation with four types of amino acids (AAs, glycine, histidine, phenylalanine, and serine) via evaporation-induced self-assembly. The films present ideal iridescence and birefringence that can be tuned by the amount of AAs added. The intercalation of AAs enlarged the pitch values, contributing to the red-shift trend of the reflective wavelength. Among the AAs, serine presented the most compatible intercalation into cellulose crystals. Interestingly, histidine and phenylalanine composite films showed high shielding capabilities of UV light in diverse wavelength regions, exhibiting multi-optical functions. The sustainable preparation of chiral nematic CNC films may provide new strategies for materials production from biocompatible lignocellulose.
功能材料的探索在很大程度上依赖于对材料结构和纳米技术的理解。在本工作中，通过蒸发诱导自组装将四种氨基酸（AA，甘氨酸、组氨酸、苯丙氨酸和丝氨酸）掺入，制备了手性向列型纤维素纳米晶体（CNC）薄膜。这些薄膜呈现出理想的虹彩和双折射，可通过添加的氨基酸量进行调节。氨基酸的插入增大了螺距值，导致反射波长出现红移趋势。在这些氨基酸中，丝氨酸在纤维素晶体中的插入最为相容。有趣的是，组氨酸和苯丙氨酸复合薄膜在不同波长区域表现出高紫外线屏蔽能力，展现出多种光学功能。手性向列型CNC薄膜的可持续制备可能为从生物相容性木质纤维素生产材料提供新策略。
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