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Preparation method of nanocellulose/fluorine-containing polyacrylate composite emulsion

A technology of nanocellulose and polyacrylate, applied in the field of compound emulsion preparation, to achieve good stability, high Young's modulus, and small particle size distribution

Active Publication Date: 2019-02-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few reports on the use of natural organic nanoparticles as Pickering emulsifiers for Pickering emulsion polymerization

Method used

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  • Preparation method of nanocellulose/fluorine-containing polyacrylate composite emulsion
  • Preparation method of nanocellulose/fluorine-containing polyacrylate composite emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Get amphiphilic block copolymer modified nanocellulose (MCNC) and grind it into powder to obtain amphiphilic block copolymer modified nanocellulose powder;

[0052] Weigh the amphiphilic block copolymer modified nanocellulose powder and deionized water at a mass ratio of 1:1000; weigh the amphiphilic block copolymer modified nanocellulose powder and deionized water mixed with water to form a mixed solution; the obtained mixed solution was dispersed in an ultrasonic cell pulverizer with a power of 20%, to obtain a light yellow modified nanocellulose dispersion;

[0053] Mix the modified nanocellulose dispersion with the mixed monomers at a mass ratio of 9:1 to form a mixture; place the mixture in an ultrasonic cell pulverizer with a power of 20% for mixing and emulsification to obtain a stable Pickering emulsion;

[0054] At room temperature, add the Pickering emulsion into a three-neck flask equipped with mechanical stirring, reflux condenser, and airway; place the thre...

Embodiment 2

[0056] Get amphiphilic block copolymer modified nanocellulose (MCNC) and grind it into powder to obtain amphiphilic block copolymer modified nanocellulose powder;

[0057] Weigh the amphiphilic block copolymer modified nanocellulose powder and deionized water respectively according to the mass ratio of 1:500; the weighed amphiphilic block copolymer modified nanocellulose powder and deionized water mixed with water to form a mixed solution; the obtained mixed solution was dispersed in an ultrasonic cell pulverizer with a power of 30% to obtain a light yellow modified nanocellulose dispersion;

[0058] Mix the modified nanocellulose dispersion with the mixed monomers at a mass ratio of 7:3 to form a mixture; place the mixture in an ultrasonic cell pulverizer with a power of 30% for mixing and emulsification to obtain a stable Pickering emulsion;

[0059] At room temperature, add the Pickering emulsion to a three-necked flask equipped with mechanical stirring, reflux condenser, a...

Embodiment 3

[0061] Get amphiphilic block copolymer modified nanocellulose (MCNC) and grind it into powder to obtain amphiphilic block copolymer modified nanocellulose powder;

[0062] Weigh the amphiphilic block copolymer modified nano-cellulose powder and deionized water at a mass ratio of 1:100; weigh the amphiphilic block copolymer-modified nano-cellulose powder and deionized water mixed with water to form a mixed solution; the obtained mixed solution was dispersed in an ultrasonic cell pulverizer with a power of 50%, to obtain a light yellow modified nanocellulose dispersion;

[0063] Mix the modified nanocellulose dispersion with the mixed monomer according to the mass ratio of 8.5:1.5 to form a mixture; place the mixture in an ultrasonic cell pulverizer with a power of 50% for mixing and emulsification to obtain a stable Pickering emulsion;

[0064] At room temperature, add the Pickering emulsion to a three-necked flask equipped with mechanical stirring, reflux condenser, and air gu...

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Abstract

The invention discloses a preparation method for nano-crystalline cellulose / fluorine containing polyacrylate compound emulsion. The method comprises the following steps: taking the nano-crystalline cellulose modified with an amphiphilic segmented copolymer and grinding into powder; uniformly dispersing the acquired powder into deionized water, thereby forming modified nano-crystalline cellulose dispersion liquid; mixing the modified nano-crystalline cellulose dispersion liquid with a mixed monomer, thereby forming a mixture; mixing and emulsifying the mixture, thereby acquiring Pickering emulsion; adding the acquired Pickering emulsion into a three-opening flask; placing the three-opening flask into hot water bath; adding an initiator aqueous solution into the three-opening flask under the conditions of stirring and argon shield; cooling the reactant after the ending of the reaction in the three-opening flask; and filtering, thereby acquiring the nano-crystalline cellulose / fluorine containing polyacrylate compound emulsion. According to the preparation method disclosed by the invention, the introduction of the nano-crystalline cellulose can overcome the defect of the fluorine containing polyacrylate compound emulsion, and the adverse effects of surfactants on the latex film performance can be avoided.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of composite emulsions, and in particular relates to a preparation method of nanocellulose / fluorine-containing polyacrylate composite emulsions. Background technique [0002] Fluorine-containing polyacrylate emulsions not only maintain the good film-forming properties, flexibility and adhesion of polyacrylate polymers, but also have the advantages of strong chemical inertness, water and oil repellency and antifouling properties of fluorine-containing polymers. , are widely used in textiles, leather, paper, coatings, construction and other fields. However, in the traditional emulsion polymerization process, the use of small molecule emulsifiers will affect the stability of the emulsion and reduce the adhesion, water and oil repellency, and antifouling properties of the latex film. [0003] Pickering emulsion refers to a new type of emulsion that uses solid particles to replace the trad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/22C08F2/24
CPCC08F2/24C08F220/14C08F220/22
Inventor 周建华李艳南马建中石海娟
Owner SHAANXI UNIV OF SCI & TECH
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