Cellulose ( IF 4.9 ) Pub Date : 2021-09-08 , DOI: 10.1007/s10570-021-04184-z Qinghua Cao 1, 2 , Jinyue Dai 1 , Xin Bao 1 , Zhenyu Zhang 1 , Fei Liu 1 , Haining Na 1 , Jin Zhu 1 , Yuhong Feng 2
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Abstract
A series of cellulose-based fluorescent materials are prepared under relative mild conditions by use of the DMSO/1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)/CO2 system to utilize as coating pigments. Through the observation under 365 nm UV light, the cellulose-based fluorescent materials exhibit good fluorescence response and bright color. Furthermore, due to the limitation of the molecular skeleton of cellulose, the intrinsic aggregation caused quenching phenomenon commonly existed in conventional organic fluorescent pigments can be effectively inhibited, which is very helpful to retain good fluorescence response in epoxy-based coating material and its coating films. Moreover, the addition of cellulose-based fluorescent materials also increases the mechanical properties of the coating film. The increase of tensile strength and tensile modulus respectively reaches ~39% and ~66%. Solvent resistance and thermal property of the coating films generally remain unchanged. The fabrication of cellulose-based fluorescent materials in DMSO/DBU/CO2 system provides a feasible way to develop the functional application of cellulose.
Graphic abstract
中文翻译：
DMSO/DBU/CO2体系制备纤维素基荧光材料作为涂层颜料
摘要
利用DMSO/1,8-二氮杂双环[5.4.0]十一碳-7-烯(DBU)/CO 2在相对温和的条件下制备了一系列纤维素基荧光材料用作涂料颜料的系统。通过在365 nm紫外光下观察，纤维素基荧光材料表现出良好的荧光响应和鲜艳的色彩。此外，由于纤维素分子骨架的限制，可以有效抑制常规有机荧光颜料普遍存在的内在聚集引起的猝灭现象，这对于在环氧基涂料及其涂膜中保持良好的荧光响应非常有帮助。 . 此外，纤维素基荧光材料的加入也提高了涂膜的机械性能。拉伸强度和拉伸模量的增加分别达到~39%和~66%。涂膜的耐溶剂性和热性能一般保持不变。2系统为开发纤维素的功能应用提供了可行的途径。
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