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A kind of fluorescent ASA papermaking sizing agent and preparation method thereof

A sizing agent and fluorescence technology, applied in the direction of adding water repellents, etc., can solve the problem of no obvious toxicity of carbon quantum dots, and achieve the effects of non-toxic and pollution-free emulsification cost, good stability and high sizing efficiency.

Inactive Publication Date: 2016-01-20
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon quantum dots are composed of non-toxic elements. Compared with other materials in vivo bioanalysis or green chemistry, this advantage is very obvious. So far, no carbon quantum dots have been found to have obvious toxicity to biomass cells or mice. ; There is no report about the use of carbon quantum dots for emulsifying and stabilizing ASA paper sizing agents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]Weigh urea and sodium citrate and mix them evenly in a molar ratio of 9:1, add deionized water to make an aqueous solution with a mass fraction of 5%, put the aqueous solution into an autoclave, heat at 180°C for 2 hours, and then cool After reaching room temperature, the obtained product was boiled at 100°C, and then centrifuged with a high-speed centrifuge at a speed of 20,000 rpm to remove the large sediment in the lower layer, and then dialyzed with a dialysis membrane with a molecular weight cut-off of 3500M. Its aqueous dispersion is light yellow under visible light, and can emit bright green fluorescence under the irradiation of an ultraviolet lamp (8W) with an excitation wavelength of 365nm. The carbon quantum dots were made into an aqueous dispersion with a mass fraction of 2%, placed in a container, and stirred at a speed of 6000 rpm using a high-speed shear emulsifier (FA200, Shanghai Fluke Fluid Machinery Manufacturing Co., Ltd., the same below). At the same ...

Embodiment 2

[0024] Weigh urea and sodium citrate and mix evenly according to the molar ratio of 1:1, add deionized water to make an aqueous solution with a mass fraction of 5%, put the aqueous solution into an autoclave, heat at 130°C for 2 hours, and cool After reaching room temperature, the resulting product was boiled at 100°C, and then centrifuged with a high-speed centrifuge at a speed of 20,000 rpm to remove the large sediment in the lower layer, and then dialyzed with a dialysis membrane with a molecular weight cut-off of 3500M. After dialysis, carbon quantum particles with a particle size of 4-9 nm Its aqueous dispersion is light yellow under visible light, and can emit bright blue fluorescence under the irradiation of an ultraviolet lamp (8W) with an excitation wavelength of 365nm. The carbon quantum dots are made into an aqueous dispersion with a mass fraction of 2%, placed in a container, stirred at a speed of 3000rpm using a high-speed shear emulsifier, and ASA (carbon chain le...

Embodiment 3

[0026] Weigh urea and sodium citrate and mix evenly according to the molar ratio of 6:1, add deionized water to make an aqueous solution with a mass fraction of 5%, put the aqueous solution into an autoclave, heat at 220°C for 2 hours, and cool After reaching room temperature, the obtained product was boiled at 100°C, and then centrifuged with a high-speed centrifuge at a speed of 20,000 rpm to remove the large sediment in the lower layer, and then dialyzed with a dialysis membrane with a molecular weight cut-off of 3500M. After dialysis, carbon quantum particles with a particle size of 1-6nm Its aqueous dispersion is light yellow under visible light, and can emit bright blue fluorescence under the irradiation of an ultraviolet lamp (8W) with an excitation wavelength of 365nm. The carbon quantum dots are made into an aqueous dispersion with a mass fraction of 2%, placed in a container, and stirred at a speed of 8000rpm using a high-speed shear emulsifier, and ASA (carbon chain ...

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Abstract

The invention relates to a fluorescent alkenyl succinic anhydride (ASA) sizing agent for papermaking and a preparation method of the fluorescent ASA sizing agent for papermaking, belonging to the technical field of sizing agent for papermaking. According to the fluorescent ASA sizing agent for papermaking, firstly, a carbon quantum dot is added into the ASA sizing agent, so that ASA sizing emulsion which can be used as the fluorescent sizing agent for papermaking and effectively improves the water resistance of paper is successfully prepared; a new emulsion stabilizer is provided for the ASA sizing agent, and the stable emulsifying agent enables the sizing agent to have fluorescence property and high sizing efficiency; furthermore, the emulsion stabilizer serving as the carbon quantum dot has the advantages of being few in dosage, non-toxic, low in cost, etc. The fluorescent ASA sizing agent for papermaking adopts a simple preparation technology, and a surface active agent, a polymer polyelectrolyte and a dye type fluorescent agent do not need to be added into the fluorescent ASA sizing agent.

Description

technical field [0001] The invention relates to a functional sizing agent in the field of papermaking, in particular to a fluorescent ASA papermaking sizing agent and a preparation method thereof. Background technique [0002] The transformation of the papermaking industry from acidic papermaking system to medium and alkaline papermaking is an innovative change in the papermaking process in the 20th century. This can not only improve the quality of paper and expand the range of fillers, but also reduce pulp consumption, reduce energy consumption, and reduce environmental pollution. Extend the life of equipment. According to statistics, in the early 1980s in Europe, cultural paper produced by medium and alkaline sizing accounted for 60% to 65% of the total cultural paper, and it reached 95% in the 1990s. The proportion of alkaline sizing jumped from 15% to over 90%. my country has used medium and alkaline sizing in production since 1989, and it has gradually become popular ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16
Inventor 于得海刘温霞王慧丽李国栋
Owner QILU UNIV OF TECH
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