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Method for preparing fluorine contained polyacrylate/dual-sized nano SiO2 composite emulsion

A technology of polyacrylate and composite emulsion, which is applied in textiles, papermaking, fiber treatment, etc. It can solve the problems of acrylic resins such as water resistance, poor solvent resistance, and reduced surface free energy, so as to improve water resistance, good compatibility, and appearance. Effects with controllable size

Inactive Publication Date: 2013-02-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the above-mentioned shortcoming of the prior art, the present invention provides a kind of fluorine-containing polyacrylate / double size nano-SiO 2 Preparation method of composite emulsion, using double-sized nano-SiO 2 Construct surface roughness, organic fluorine and long-chain silicone reduce surface free energy, thereby endowing the fabric with superhydrophobic properties, and at the same time solve the defects of poor water resistance and solvent resistance of acrylic resin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A fluorine-containing polyacrylate / double-sized nano-SiO 2 The preparation method of composite emulsion comprises the following steps:

[0021] The first step, small particle size SiO 2 Preparation and modification: add 30mL ammonia water and 600mL ethanol to a three-necked flask A at 50°C-60°C, stir for 20min, add dropwise 90mL ethanol solution dissolved in 50mL tetraethyl orthosilicate, and react at constant temperature for 5h to form a small particle size SiO 2 Then add 20mL ethanol solution with 5mL γ-aminopropyltriethoxysilane dropwise to it, react at constant temperature for 12h, centrifuge, wash, and dry to form modified SiO with small particle size 2 ;

[0022] The second step, large particle size SiO 2 Preparation and modification: add 50mL deionized water, 50mL ammonia water and 600mL isopropanol into three-necked flask B, stir at room temperature for 30min, add 28mL tetraethyl orthosilicate, react for 6h, centrifuge, wash, and dry to form large particle s...

Embodiment 2

[0026] A fluorine-containing polyacrylate / double-sized nano-SiO 2 The preparation method of composite emulsion comprises the following steps:

[0027] The first step, small particle size SiO 2 Preparation and modification: add 30mL ammonia water and 600mL ethanol to a three-necked flask A at 50°C-60°C, stir for 20min, add dropwise 90mL ethanol solution dissolved in 50mL tetraethyl orthosilicate, and react at constant temperature for 5h to form a small particle size SiO 2 Then add 20mL ethanol solution with 5mL γ-aminopropyltriethoxysilane dropwise to it, react at constant temperature for 12h, centrifuge, wash, and dry to form modified SiO with small particle size 2 ;

[0028] The second step, large particle size SiO 2 Preparation and modification: add 50mL deionized water, 50mL ammonia water and 500mL methanol into three-necked flask B, stir at room temperature for 30min, add 28mL tetraethyl orthosilicate, react for 6h, centrifuge, wash, and dry to form a large particle si...

Embodiment 3

[0032] A fluorine-containing polyacrylate / double-sized nano-SiO 2 The preparation method of composite emulsion comprises the following steps:

[0033] The first step, small particle size SiO 2 Preparation and modification: add 30mL ammonia water and 600mL ethanol to a three-necked flask A at 50°C-60°C, stir for 20min, add dropwise 90mL ethanol solution with 40mL tetraethyl orthosilicate, and react at constant temperature for 5h to form a small particle size SiO 2 alcohol sol. Then drop 20mL ethanol solution in which 3.5mL γ-aminoethylpropyltrimethoxysilane was dissolved, react at constant temperature for 12h, centrifuge, wash, and dry to form modified SiO 2 ;

[0034] The second step, large particle size SiO 2 Preparation and modification: add 50mL deionized water, 35mL ammonia water, 300mL methanol and 300mL isopropanol into three-necked flask B, stir at room temperature for 30min, add 28mL tetraethyl orthosilicate, react for 6h, centrifuge, wash and dry to form a large ...

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Abstract

Disclosed is a method for preparing a fluorine contained polyacrylate / dual-sized nano SiO2 composite emulsion. The method includes preparing and modifying small particle size SiO2, preparing and modifying large particle size SiO2, preparing and modifying dual-sized nano SiO2, and finally preparing the fluorine contained polyacrylate / dual-sized nano SiO2 composite emulsion. The dual-sized nano SiO2 is used for constructing surface roughness, and organic fluorine and long chain organic silicon are used for reducing surface free energy, so that fabrics are provided with super-hydrophobic performances, and simultaneously, defects that acrylic resins are poor in water-proof and solvent resistant performances are overcome.

Description

technical field [0001] The invention relates to the technical field of preparation of composite emulsions, in particular to a fluorine-containing polyacrylate / double-size nano-SiO 2 Preparation method of compound emulsion. Background technique [0002] Acrylic resin is widely used because of its strong adhesion, flat and bright coating film, flex resistance, stable structure and aging resistance, and has the advantages of cheap, safe, non-combustible, non-toxic, and less environmental pollution. The large number of hydrophilic groups and the linear structure of the molecular chain cause the defects of this type of resin, such as poor water resistance and solvent resistance. [0003] Fluorine-containing polymers have the characteristics of hydrophobic and oil-repellent, low surface energy, heat-resistant stability, and low dielectric constant. The introduction of organic fluorine into acrylic resin to prepare fluorine-containing polyacrylate can make the resin have good wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F212/08C08F230/08C08F220/06C08F2/26C08K9/06C08K3/36D06M15/263D06M11/79
Inventor 马建中鲁娟鲍艳张晓艳郑莹
Owner SHAANXI UNIV OF SCI & TECH
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