Preparation method and application of fluorine-containing microspheres without stabilizers on surfaces

A stabilizer and microsphere technology, used in coatings, powder coatings, etc., can solve problems such as harming the health of construction workers, cumbersome processing, and a large amount of organic solvents, achieving good hydrophobicity and corrosion resistance, simple preparation method, Fast response time

Inactive Publication Date: 2017-08-11
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still requires a series of treatments on the surface of inorganic particles. The treatment process is cumbersome and requires the use of a large amount of organic solvents, which not only pollutes the environment, but also endangers the health of construction workers.

Method used

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  • Preparation method and application of fluorine-containing microspheres without stabilizers on surfaces
  • Preparation method and application of fluorine-containing microspheres without stabilizers on surfaces
  • Preparation method and application of fluorine-containing microspheres without stabilizers on surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1) Add 120 mL of anhydrous tetrahydrofuran (THF) to a single-necked flask, add 2 mmol of polyethylene glycol monomethyl ether (mPEG), 4 mmol of RAFT reagent 4-(2-carboxyethylcarbonyl) oxyethoxyphenyl di Isobutyronitrile thiocarbamate (CEPDB) and 0.2 mmol 4-dimethylaminopyridine (DMAP) were dissolved in anhydrous tetrahydrofuran (THF), and the one-necked flask was placed in an ice-water bath and cooled to 0°C with stirring;

[0053] 2), 2), 4mmol dicyclohexylcarbodiimide (DCC) was dissolved in 30mL anhydrous tetrahydrofuran (THF) to obtain a DCC-THF solution, and the DCC-THF solution was added dropwise in a single-necked flask, and the dropping time was controlled at After 30 minutes of dripping, continue to place the reaction kettle in an ice-water bath for 1 hour after the addition;

[0054] 3), the one-necked flask was taken out from the ice-water bath, then stirred and reacted at room temperature for 48 hours, and the insoluble matter dicyclohexyl urea (DCU) in the r...

Embodiment 2

[0069] 1) Add 120 mL of anhydrous tetrahydrofuran (THF) to a single-necked flask, add 2 mmol of polyethylene glycol monomethyl ether (mPEG), 2.2 mmol of RAFT reagent 4-(2-carboxyethylcarbonyl)oxyethoxyphenyl Isobutyronitrile dithiocarbamate (CEPDB) and 0.02 mmol 4-dimethylaminopyridine (DMAP) were dissolved in anhydrous tetrahydrofuran (THF), and the one-necked flask was placed in an ice-water bath and cooled to 0°C with stirring;

[0070] 2), 2), 2mmol dicyclohexylcarbodiimide (DCC) was dissolved in 30mL anhydrous tetrahydrofuran (THF) to obtain a DCC-THF solution, and the DCC-THF solution was added dropwise in a single-necked flask, and the dropping time was controlled at After 40 minutes of dripping, continue to place the reaction kettle in an ice-water bath for 1 hour after the addition;

[0071] 3), the one-necked flask was taken out from the ice-water bath, then stirred and reacted at room temperature for 48 hours, and the insoluble matter dicyclohexyl urea (DCU) in the ...

Embodiment 3

[0086] 1) Add 120 mL of anhydrous tetrahydrofuran (THF) to a single-necked flask, add 2 mmol of polyethylene glycol monomethyl ether (mPEG), 3 mmol of RAFT reagent 4-(2-carboxyethylcarbonyl) oxyethoxyphenyl di Isobutyronitrile thiocarbamate (CEPDB) and 0.1 mmol 4-dimethylaminopyridine (DMAP) were dissolved in anhydrous tetrahydrofuran (THF), and the one-necked flask was placed in an ice-water bath and cooled to 0°C with stirring;

[0087] 2) Dissolve 5mmol of dicyclohexylcarbodiimide (DCC) in 30mL of anhydrous tetrahydrofuran (THF) to obtain a DCC-THF solution, add the DCC-THF solution dropwise into a single-necked flask, and the dropping time is controlled within 30 minutes to complete the drop After the dropwise addition is completed, continue to place the reaction kettle in an ice-water bath for 1 hour of reaction;

[0088] 3), the one-necked flask was taken out from the ice-water bath, then stirred and reacted at room temperature for 48 hours, and the insoluble matter dicy...

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Abstract

The invention discloses a preparation method and an application of fluorine-containing microspheres without stabilizers on the surfaces. Anhydrous THF (tetrahydrofuran) is added to a single-neck flask, mPEG (methoxy polyethylene glycol), an RAFT reagent CEPDB (4-(2-carboxyethylcarbonyl)oxy-ethoxy phenyl dithiocarbamate isobutyronitrile ester) and DMAP (4-dimethylaminopyridine) are dissolved in anhydrous THF, the single-neck flask is placed in an ice-water bath, and the mixture is stirred and cooled to 0 DEG C; DCC (dicyclohexylcarbodiimide) is dissolved in anhydrous THF, and a DCC-THF solution is obtained; the DCC-THF solution is all dropwise added to the single-neck flask within 30-50 min, and the single-neck flask is continuously placed in the ice-water bath for a reaction for 1 h after the DCC-THF solution is dropwise added. The method is rapid, environment-friendly and energy-saving, and fluorine-containing polymer microspheres without stabilizers on the surfaces are rapidly prepared with an optical RAFT dispersion polymerization method and a thermal aftertreatment method with an ethanol/water mixed solvent as a reaction medium. The preparation method is simple and the reaction speed is high.

Description

technical field [0001] The invention relates to the field of superamphiphobic materials, in particular to a preparation method and application of fluorine-containing microspheres without a stabilizer on the surface. Background technique [0002] Surface wettability is an important characteristic of solid surfaces, and the contact angle (CA) is usually used to characterize the wettability of liquids on solids. Generally speaking, a superhydrophobic surface refers to a surface with a contact angle between a solid surface and water > 150° and a rolling angle < 10°, and if the contact angle of a solid surface to oil > 150°, it becomes a superoleophobic surface. The superhydrophobic / oleophobic superamphiphobic surface has the characteristics of self-cleaning, anti-fouling, anti-fog, hydrophobic, etc., and has a wide range of applications in the fields of coatings, construction, liquid transportation, and biomedicine. [0003] The construction of superamphiphobic surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F220/22C09D153/00C09D5/03
CPCC08F220/22C08F293/005C09D5/03C09D153/00
Inventor 余明光王青陈奕鸿陈尚贤林滨滨卢敏仪欧海浩左思雅
Owner FOSHAN UNIVERSITY
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