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Biomass-based flexible light-emitting material and preparation method and application thereof

A technology for luminescent materials and biomass, applied in the directions of luminescent materials, chemical instruments and methods, etc., can solve the problem of low elongation at break, etc., and achieve the effects of improving mechanical properties, high efficiency, fast cost, and good mechanical responsiveness

Inactive Publication Date: 2019-10-08
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chitosan is a natural, biocompatible and biodegradable polycationic polysaccharide with antimicrobial activity and film-forming properties, but the elongation at break of the formed film is not high

Method used

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  • Biomass-based flexible light-emitting material and preparation method and application thereof
  • Biomass-based flexible light-emitting material and preparation method and application thereof
  • Biomass-based flexible light-emitting material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of Biomass-based Flexible Luminescent Materials

[0034] (1) After the cotton is treated with a NaOH solution with a mass fraction of 2%, it is hydrolyzed with sulfuric acid with a mass fraction of 64%, then washed 5 times, and dialyzed to a pH of 7.0 to obtain a cellulose nanocrystal suspension;

[0035] (2) The cellulose nanocrystal suspension prepared in step (1) was ultrasonically treated for 10 minutes at a power of 200W and a frequency of 40kHz, and then sodium alginate was added therein to obtain a mixed solution in which cellulose nanocrystals The mass fraction of sodium alginate is 0.1%, and the mass fraction of sodium alginate is 2%. After ultrasonic treatment for 10 minutes under the condition of power of 200W and frequency of 40kHz, it is left to stand until there are no bubbles in the mixed solution, and then the substrate is vertically immersed in In this mixed solution, a thin film is formed on the substrate after being left for 2 days at a te...

Embodiment 2

[0037] Preparation of Biomass-based Flexible Luminescent Materials

[0038] (1) After the cotton is treated with a NaOH solution with a mass fraction of 2%, it is hydrolyzed with sulfuric acid with a mass fraction of 64%, then washed 3 times, and dialyzed to a pH of 7.0 to obtain a cellulose nanocrystal suspension;

[0039] (2) The cellulose nanocrystal suspension prepared in step (1) was ultrasonically treated for 15 minutes at a power of 200W and a frequency of 40kHz, and then sodium alginate was added therein to obtain a mixed solution in which cellulose nanocrystals The mass fraction of sodium alginate is 0.1%, and the mass fraction of sodium alginate is 2%. After ultrasonic treatment for 10 minutes under the condition of power of 200W and frequency of 40kHz, it is left to stand until there are no bubbles in the mixed solution, and then the substrate is vertically immersed in In this mixed solution, a thin film is formed on the substrate after being left for 2 days at a te...

Embodiment 3

[0041] Preparation of Biomass-based Flexible Luminescent Materials

[0042] (1) After the cotton is treated with a NaOH solution with a mass fraction of 2%, it is hydrolyzed with a mass fraction of 64% sulfuric acid, then washed 5 times, and dialyzed to a pH of 7.0 to obtain a cellulose nanocrystal suspension, Then modify the surface of the cellulose nanocrystals with carboxyl groups to prepare a suspension of carboxylated cellulose nanocrystals;

[0043] (2) Treat the carboxylated cellulose nanocrystal suspension prepared in step (1) with a power of 200W and a frequency of 40kHz for 10min, and then add sodium alginate to obtain a mixed solution, in which carboxyl The mass fraction of cellulose nanocrystals is 0.5%, the mass fraction of sodium alginate is 2%, and then the power is 200W, and the frequency is 40kHz under the condition of ultrasonic treatment for 10min and then leave standstill until there is no bubble in the mixed solution, and then The substrate is vertically im...

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Abstract

The invention relates to a biomass-based flexible light-emitting material and a preparation method and application thereof and belongs to the technical field of light-emitting material preparation. The preparation method includes: adding alginate or an alginate derivative into a biomass-based nano material suspension to obtain a mixed solution, performing ultrasonic treatment, standing until no bubbles exist in the mixed solution, vertically immersing a substrate into the mixed solution, allowing the substrate to stay in the mixed solution at the temperature of 25-45 DEG C and the humidity of0-50% for 1-4 days to form a thin film on the substrate, and adding a calcium ion solution to prepare the biomass-based flexible light-emitting material after 5-12 hours. The biomass-based flexible light-emitting material is degradable, environmentally friendly, good inn mechanical responsiveness and promising in application prospect in fields such as anti-counterfeiting and sensing. The preparation method is simple in preparation process, efficient, quick, low in cost and suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of luminescent material preparation, and in particular relates to a biomass-based flexible luminescent material and a preparation method and application thereof. Background technique [0002] Cellulose, which is abundant and renewable, and its crystalline form, cellulose nanocrystals, is widely used as a reinforcing agent. When evaporated, the aqueous suspension of cellulose nanocrystals can form a structure in which the chiral nematic type remains in the cured film, and the film with a highly ordered and periodic chiral nematic structure can selectively reflect circularly polarized light, resulting in Structural color appearance. One advantage of photonic films based on cellulose nanocrystals over other films is that the structural color can be easily tuned by various additives. However, because the assembly period of the cellulose nanocrystal film is too small, the diffraction wavelength changes too fast...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08J7/14C08L5/04C08L1/04C08L5/08C09K11/06
CPCC08J5/18C08J7/14C08J2305/04C08J2401/04C08J2405/08C09K11/06C09K2211/145
Inventor 甘霖黄进冯娜
Owner SOUTHWEST UNIVERSITY