Fluorescent composite films of oriented cellulose nanocrystals with fluorescein

IF 4.9 2区工程技术 Q1 MATERIALS SCIENCE, PAPER & WOOD

Cellulose Pub Date : 2025-02-28 DOI:10.1007/s10570-025-06420-2

Inna Shkyliuk, Tomasz Makowski, Ewa Piorkowska

引用次数: 0

Abstract

Thin films of cellulose nanocrystals (CNCs) with fluorescein (FL) were prepared employing the zone-casting technique. Using an aqueous CNC suspension admixed with FL allowed the preparation of fluorescent CNC/FL films with varying FL content. In the zone-cast films, the CNCs were oriented perpendicularly to the zone-casting direction. The fluorescence emission intensity depended on the FL content in the films and was the strongest at the FL to CNC weight ratios of 1/125 and 1/200. Moreover, the emission intensity and polarization depended on the excitation beam polarization. The strongest emission was recorded when the polarizer and analyzer axes were parallel to the direction of CNC orientation. Moreover, the films sprayed with aqueous solutions after drying exhibited fluorescence depending on the solution pH in a wide pH range.

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荧光素取向纤维素纳米晶体的荧光复合膜

采用区铸法制备了纤维素纳米晶体（CNCs）荧光素薄膜。使用与FL混合的CNC悬浮液可以制备具有不同FL含量的荧光CNC/FL薄膜。在区铸膜中，cnc垂直于区铸方向。荧光发射强度与膜中FL含量有关，当FL与CNC质量比为1/125和1/200时荧光发射强度最强。发射强度和偏振度取决于激发光束的偏振度。当偏振器和分析仪轴平行于CNC取向方向时，发射最强。此外，干燥后用水溶液喷涂的薄膜在较宽的pH范围内表现出随溶液pH值的变化而变化的荧光。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cellulose 工程技术-材料科学：纺织

CiteScore

10.10

自引率

10.50%

发文量

580

审稿时长

3-8 weeks

期刊介绍： Cellulose is an international journal devoted to the dissemination of research and scientific and technological progress in the field of cellulose and related naturally occurring polymers. The journal is concerned with the pure and applied science of cellulose and related materials, and also with the development of relevant new technologies. This includes the chemistry, biochemistry, physics and materials science of cellulose and its sources, including wood and other biomass resources, and their derivatives. Coverage extends to the conversion of these polymers and resources into manufactured goods, such as pulp, paper, textiles, and manufactured as well natural fibers, and to the chemistry of materials used in their processing. Cellulose publishes review articles, research papers, and technical notes.