Preparation method of fluorescent ASA Pickering emulsion and application thereof

A fluorescent and emulsion technology, which is applied in the fields of chemistry and nanomaterials science, can solve the problems of unfavorable dispersion, achieve good water solubility, good sizing effect in the slurry, and increase the stability

Active Publication Date: 2018-12-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The Chinese patent application with the application number 201310714926.2 discloses a carbon quantum dot hectorite stabilization system and a method for preparing paraffin wax emulsion, using carbon quantum dot hectorite as the stabilization system; however, the inventor found in the specific implementation process that lithium soap Stone has strong hydrophilicity, and its oleophobicity due to the large amount of inorganic ions between the layers is not conducive to its dispersion in the polymer matrix.
The Chinese patent application with the application number 201410054603.X discloses a fluorescent alkenyl succinic anhydride sizing emulsion and its preparation method, using bentonite with a particle size of 20-200nm; Oleophobicity, which is not conducive to its dispersion in the polymer matrix

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Weigh 4g of organically modified montmorillonite (diameter 2μm, thickness 20nm) and disperse in 160g of deionized water to obtain organically modified montmorillonite sol; add 1g of carbon quantum dots (diameter 2nm, zeta potential-20mv) to organic modified In the active montmorillonite sol, mix evenly to obtain the carbon quantum dot / organic modified montmorillonite stabilization system; the carbon quantum dot / organic modification montmorillonite stabilization system prepared above is added into 100g mass fraction of 5% ASA solution (viscosity 0.1Pa·S), and then stirred (stirring speed 1500r / min, stirring time 8min) emulsification, prepared oil-in-water type liquid with fluorescent ASA Pickering emulsion.

[0046] The emulsion prepared in Example 1 is milky white, with an average particle size of 3.5-4.8 μm and a density of 7.5-8.5 (kg / L, 25° C.).

[0047] The ASA Pickering emulsion prepared in Example 1 was placed at room temperature for 18 hours without phase precipi...

Embodiment 2

[0053] Weigh 3g of organically modified montmorillonite (diameter 4μm, thickness 18nm) and disperse in 90g of deionized water to obtain organically modified montmorillonite sol; add 1g of carbon quantum dots (diameter 4nm, zeta potential-30mv) to the organic modified In the active montmorillonite sol, mix evenly to obtain the carbon quantum dot / organic modified montmorillonite stabilization system; the carbon quantum dot / organic modification montmorillonite stabilization system prepared above is added to 100g of ASA solution with a mass fraction of 10% Medium (viscosity 0.3Pa·S) solution, and then stirred (stirring speed 2500r / min, stirring time 12min) emulsification, prepared oil-in-water liquid with fluorescent ASA Pickering emulsion.

[0054] The emulsion prepared in Example 2 is milky white, with an average particle size of 3.5-4.8 μm and a density of 7.5-8.5 (kg / L, 25° C.).

[0055] The ASA Pickering emulsion prepared in Example 2 was placed at room temperature for 24 hou...

Embodiment 3

[0057] Weigh 2g of organically modified montmorillonite (diameter 3μm, thickness 15nm) and disperse in 70g of deionized water to obtain organically modified montmorillonite sol; add 1g of carbon quantum dots (diameter 3nm, zeta potential -40mv) to organic modified In the active montmorillonite sol, mix evenly to obtain the carbon quantum dot / organic modified montmorillonite stable system; the carbon quantum dot / organic modified montmorillonite stable system prepared above is added into 100g mass fraction of 8% ASA solution Medium (viscosity 0.2Pa·S) solution, and then stirred (stirring speed 2000r / min, stirring time 10min) emulsification, prepared oil-in-water liquid with fluorescent ASA Pickering emulsion.

[0058] The emulsion prepared in Example 3 is milky white, with an average particle size of 3.5-4.8 μm and a density of 7.5-8.5 (kg / L, 25° C.).

[0059] The ASA Pickering emulsion prepared in Example 3 was placed at room temperature for 30 hours without phase precipitation...

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Abstract

The invention belongs to the field of chemistry and nanometer material science, and specifically discloses a preparation method of a fluorescent ASA Pickering emulsion and application thereof. The fluorescent ASA Pickering emulsion is mainly prepared by using water, carbon quantum dots, organic modified montmorillonite and ASA as raw materials. The mass ratio of the carbon quantum dots to the organic modified montmorillonite is 1: (2-4); and the mass ratio of the organic modified montmorillonite to the ASA is (2-4): 100. By using the carbon quantum dot/organic modified montmorillonite stabilization system for preparation of ASA Pickering, the adverse effects of a surfactant on water and soil can be avoided, and eco-environmental stress can be reduced. The ASA Pickering emulsion prepared bythe emulsion stabilization system has fluorescence property. By the use of the emulsion for internal sizing of paper sheet, the degree of paper sizing can be remarkably enhanced, and the internal sizing effect of the ASA Pickering emulsion is better.

Description

technical field [0001] The invention belongs to the field of chemistry and nanometer material science, in particular to a preparation method and application of fluorescent ASA (alkenyl succinic anhydride) Pickering emulsion. Background technique [0002] ASA (alkenyl succinic anhydride) is widely used in the paper industry, and is used in pulp in the form of O / W (oil-in-water) emulsion to improve the water resistance of paper sheets. In the paper industry, the traditional paper sizing agent emulsion usually uses surfactants as emulsifiers. The extensive use of surfactants, especially synthetic surfactants, has caused serious harm to water and soil, and is not conducive to the improvement of paper sizing. ; The amount of cationic starch in the commercial sizing agent emulsion is usually relatively large, and the obtained sizing agent emulsion has a low content of active ingredients. The solid particle-stabilized emulsion, that is, the Pickering emulsion, can avoid the advers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/69D21H17/67D21H17/37D21H21/16
CPCD21H17/37D21H17/67D21H17/69D21H21/16
Inventor 杨仁党谢俊贤张志礼
Owner SOUTH CHINA UNIV OF TECH
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