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Solvent-free lignin fluorescent material and preparation method thereof

A technology of fluorescent material and lignin, applied in the field of solvent-free lignin fluorescent material and its preparation, can solve the problems of fluorescence quenching, nanomaterial agglomeration, easy to be affected by temperature, etc. Effect

Pending Publication Date: 2022-07-12
QINGDAO UNIV OF SCI & TECH
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Problems solved by technology

Existing lignin nano-fluorescent materials need to be dispersed in a solvent system or a polymer system, and there are certain requirements for the dispersion concentration of nano-materials. In a high-concentration state, nano-materials are prone to agglomeration, resulting in fluorescence quenching
The lignin nano-fluorescent materials dispersed in the solvent system are also easily affected by temperature, and the nano-materials will also affect the original fluorescence intensity of the material due to agglomeration under heating.
The above restrictions are unfavorable for the practical application of lignin fluorescent materials

Method used

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  • Solvent-free lignin fluorescent material and preparation method thereof
  • Solvent-free lignin fluorescent material and preparation method thereof

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Embodiment 1

[0024] Add 3 mL of sodium lignosulfonate aqueous solution containing 105 mg to 8 mL of 50 mM N,N,N-trimethyl-8-(4-(2-(4-octyloxyphenyl)-1, bromide) solution. 2-diphenylvinyl)phenoxy)butane-1-ammonium aqueous solution was mixed, the reaction system was magnetically stirred at room temperature for 10 minutes and then left to stand for treatment. After the precipitation was complete, the supernatant was discarded, and the obtained precipitation was The solvent-free lignin fluorescent material of the present invention is prepared after successively washing with water, filtering out water, and freeze-drying for 24 hours.

[0025] The prepared solvent-free lignin fluorescent material, the fluorescence emission spectrum under the excitation of 365nm wavelength, such as figure 1 As shown, it is concluded that the solvent-free lignin fluorescent material of the present invention has a fluorescence emission peak at 400-600 nm under excitation at a wavelength of 365 nm, and a maximum emi...

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Abstract

The invention relates to the technical field of biomass materials, and mainly relates to a solvent-free lignin fluorescent material and a preparation method thereof. The preparation method of the solvent-free lignin fluorescent material comprises the following steps: preparing an ionic compound from sodium lignin sulfonate and tetraphenyl ethylene type quaternary ammonium salt in an aqueous solution, purifying the ionic compound, and the like. The solvent-free lignin fluorescent material prepared by the invention can maintain good fluorescence performance in a relatively high temperature range, and also has good hydrophobic performance. The solvent-free lignin fluorescent material prepared by the method can be applied to the related fields of biomedicine, fluorescent materials, waterproof coatings and the like.

Description

technical field [0001] The invention relates to the technical field of biomass materials, and mainly relates to a solvent-free lignin fluorescent material and a preparation method thereof. Background technique [0002] Lignin is one of the abundant biomass resources in nature, and it is a polymer material rich in benzene ring structure. At present, lignin is separated and purified as a by-product in the paper industry process, and is mainly used by incineration to generate heat energy. Due to the irregular benzene ring structure of the molecule itself, it is difficult to develop lignin into other types of functional materials, which limits the wide application of lignin materials. [0003] The rich benzene ring structure of lignin molecules provides the structural basis for its spectroscopic properties. In recent years, lignin-based fluorescent materials have been developed, but mainly fluorescent nanoparticles and nanospheres. The existing lignin nano-fluorescent materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C08H7/00
CPCC09K11/06C08H6/00C09K2211/1425
Inventor 吴中涛张蕾
Owner QINGDAO UNIV OF SCI & TECH
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