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
Highlights
With the constant exhaustion of petrochemical energy and the aggravation of environmental pollution, the development and utilization of clean and renewable bioresources have been widely attended by people (Llevot et al, 2016; Teng et al, 2010)
A series of cellulose-based fluorescent materials are prepared under relative mild conditions by use of the DMSO/DBU/CO2 system to utilize as coating pigments
Corncob cellulose and Microcrystalline cellulose (MCC) were firstly dissolved in DMSO/DBU/CO2 system and reacted with four aromatic organics contained the luminescent groups of 2-BMN, Coumarin 151, 1-BMP and 9-CMA to form cellulose-based fluorescent materials, respectively
Summary
With the constant exhaustion of petrochemical energy and the aggravation of environmental pollution, the development and utilization of clean and renewable bioresources have been widely attended by people (Llevot et al, 2016; Teng et al, 2010). As one of the most important green bioresources with good performance, cellulose is strongly expected to be used as renewable material (Druel et al, 2018). In general, cellulose has very strong intermolecular and intramolecular hydrogen bonds. It makes cellulose difficult to processing and forming Zhang et al, 2005; L. Zhang et al, 2019) This defect weakens the applicability of cellulose
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