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Preparation method of transparent nano-cellulose paper with fluorescence properties

A technology of nanocellulose and fluorescence characteristics, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of limited development space, serious environmental pollution, complex preparation process, etc., and achieve difficult imitation, uniform dispersion and low cost. Effect

Inactive Publication Date: 2014-11-05
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional cellulose paper usually uses wood pulp fibers or cellulose derivatives as raw materials. The preparation process is complicated, the consumption of reagents is large, and the environmental pollution is serious, which limits the space for further development.

Method used

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  • Preparation method of transparent nano-cellulose paper with fluorescence properties
  • Preparation method of transparent nano-cellulose paper with fluorescence properties
  • Preparation method of transparent nano-cellulose paper with fluorescence properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] NCF was dispersed in 50 mL deionized water, and ultrasonically dispersed to form a stable suspension with a mass fraction of 1w / v%; TEMPO and NaBr were dissolved in 50 mL deionized water at 0.002 mol / L and 0.03 mol / L, respectively, to obtain a light yellow transparent solution; the solution was added dropwise to the NCF suspension, and then NaClO solution was added to adjust the pH value to 10, and reacted at room temperature for 3 h; after the reaction was completed, the pH value was adjusted to 7, and washed with water several times to obtain ONCF; the obtained ONCF was obtained by 0.2 w / v% dispersed in 50 mL absolute ethanol, add 5 mg Eu(dbm) 3 (H 2 O) 2 , Ultrasonic dispersion to obtain fluorescent ONCF ethanol suspension; pour the suspension into a high-pressure filter press, adjust the pressure to 0.6MPa, and press the high-pressure filter until there is no more filtrate flowing out, and the filter press is over; carefully take out the filter membrane in the filt...

Embodiment 2

[0027] NCF was dispersed in 50 mL deionized water, and ultrasonically dispersed to form a stable suspension with a mass fraction of 1w / v%; TEMPO and NaBr were dissolved in 50 mL deionized water at 0.002 mol / L and 0.03 mol / L, respectively, to obtain a light yellow transparent solution The solution was added dropwise to the NCF suspension, NaClO solution was added, the pH value was adjusted to 10, and the reaction was carried out at room temperature for 3 h; the reaction was completed, the pH value was adjusted to 7, and ONCF was obtained by washing with water several times; v% was dispersed in 50 mL absolute ethanol, and 7.5 mg Tb(Tfacac) was added 3 (H 2 O) 2 , Ultrasonic dispersion to obtain fluorescent ONCF ethanol suspension; pour the suspension into a high-pressure filter press, adjust the pressure to 0.6MPa, and press the high-pressure filter until there is no more filtrate flowing out, and the filter press is over; carefully take out the filter membrane in the filter pr...

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PUM

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Abstract

The invention discloses a preparation method of a transparent nano-cellulose paper with fluorescence properties. According to the method, TEMPO (2, 2, 6, 6-tetramethylpiperidine-1-oxyl) is employed to perform oxidation modification on natural nano-cellulose fiber, and the coordination mechanism of rare earth complexes is utilized for the first time to graft a rare earth complex with fluorescence properties to the modified nano-cellulose fiber in situ so as to obtain a nano-cellulose sol with fluorescence properties, and finally through a high pressure filtration method, the self-assembled fluorescent transparent natural nano-cellulose paper can be synthesized by one step. The transparent nano-cellulose paper with fluorescence properties provided by the invention has the characteristics of naturalness, environmental protection, no toxicity or harm, high light transmission, good flexibility, easy excitation, and advanced synthetic process, etc.

Description

technical field [0001] The invention relates to a preparation method of luminescent transparent nano paper, which belongs to the technical field of composite materials and papermaking. Background technique [0002] Traditional cellulose paper usually uses wood pulp fibers or cellulose derivatives as raw materials. The preparation process is complicated, the consumption of reagents is large, and the environmental pollution is serious, which limits the space for further development. Nano-natural cellulose paper is widely used in medical dialysis, food packaging, photoelectric film and other fields due to its non-toxic, harmless, biocompatibility, environmental friendliness, and high mechanical strength. Unlike ordinary cellulose paper, nanocellulose paper greatly reduces light scattering due to the reduced diameter of the fibers, so that nanocellulose paper has high flexibility and optical transparency. It is used in LED displays, solar cells, sensors, etc. The field has grea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L1/08C08B15/05C09K11/06
Inventor 冯欣苗苗施利毅赵经鹏孙丽宁方建慧
Owner SHANGHAI UNIV
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