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Preparation method of superhydrophobic self-cleaning material

A self-cleaning, super-hydrophobic technology, applied in chemical instruments and methods, fibrous fillers, inorganic pigment treatment, etc., can solve problems such as easy to be damaged by external forces, expensive fluorosilicon compounds, and poor mechanical strength of the surface microstructure

Inactive Publication Date: 2011-03-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Most of the preparation methods of superhydrophobic surfaces reported so far require special equipment and expensive fluorosilicon compounds, which are not suitable for the preparation of large-area superhydrophobic surface coatings.
From the perspective of practical application, the strength and durability of the current superhydrophobic surface are poor, which limits the application of this surface in many occasions. The microstructure of the surface is also easily damaged by external forces due to poor mechanical strength, resulting in the loss of superhydrophobicity.

Method used

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  • Preparation method of superhydrophobic self-cleaning material
  • Preparation method of superhydrophobic self-cleaning material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Silicone rubber and vulcanizing agent (Double Two Five) were kneaded on a two-roll mill (at a temperature of 20° C.) for 5 minutes at a ratio of 100:0.5 in parts by mass. Set aside the premixed glue for later use.

[0032] 2) fluorinating graphite. Prepare the mixed gas of fluorine and nitrogen with a fluorine concentration of 5% (volume fraction); dry the graphite in the reactor at 50°C for 10 hours in vacuum, continuously fill with nitrogen, and vacuumize to ensure that there is no carbon dioxide before the reaction. Oxygen: Introduce the mixed gas of fluorine and nitrogen into the reactor, the fluorination temperature is 0°C, and the treatment time is 3 hours. After the reaction is completed, vacuum and nitrogen are changed 10 times, and the fluorinated graphite is obtained after taking it out. (wherein: the gas extracted after the reaction is passed into alkaline water for harmless treatment.)

[0033] 3) Use the fluorinated graphite (5phr), premixed rubber (10...

Embodiment 2

[0038]1) Knead the silicone rubber (100Phr) and the vulcanizing agent (double 25) (1Phr) on a two-roll mill (at a temperature of 20°C) for 5 minutes. Set aside the premixed glue for later use.

[0039] 2) fluorinating graphite. Prepare the mixed gas of fluorine and nitrogen with fluorine concentration of 10% (volume fraction); dry the graphite in the reactor at 50°C for 10 hours in vacuum, continuously fill nitrogen, and vacuumize to ensure that there is no carbon dioxide before the reaction. Oxygen: introduce the mixed gas of fluorine and nitrogen into the reactor, the fluorination temperature is 10°C, and the treatment time is 5 hours. After the reaction is completed, vacuum and nitrogen are changed 10 times, and the fluorinated graphite is obtained after taking it out. (wherein: the gas extracted after the reaction is passed into alkaline water for harmless treatment.)

[0040] 3) fluorinated graphite (10phr), premixed rubber (15phr), polypropylene (100phr) and other addi...

Embodiment 3

[0045] 1) Mix silicone rubber (100Phr) and vulcanizing agent (double 25) (2Phr) on a two-roll mill (at a temperature of 20°C) for 10 minutes. Set aside the premixed glue for later use.

[0046] 2) fluorinating graphite. Prepare the mixed gas of fluorine and nitrogen with fluorine concentration of 10% (volume fraction); dry the graphite in the reactor at 50°C for 10 hours in vacuum, continuously fill nitrogen, and vacuumize to ensure that there is no carbon dioxide before the reaction. Oxygen: introduce the mixed gas of fluorine and nitrogen into the reactor, the fluorination temperature is 40°C, and the treatment time is 10 hours. After the reaction is completed, vacuum and nitrogen are changed 10 times, and the fluorinated graphite is obtained after taking it out. (wherein: the gas extracted after the reaction is passed into alkaline water for harmless treatment.)

[0047] 3) Extrude the fluorinated graphite (15phr), premixed rubber (20phr), polypropylene (100phr) and other...

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Abstract

The invention relates to a preparation method of superhydrophobic self-cleaning material. Firstly silicon rubber and vulcanizer are mixed by weight proportion of 100: (0.5-3), refining is carried out, and pre-mixed glue is prepared; then graphite is fluoridized, polypropylene (100phr), graphite fluoride (1-50phr), pre-mixed glue (1-50phr), antioxidant (0.5-3phr), stearic acid (0.5-3phr) and glycerol (0.5-3phr) are mixed based on weight part, a double screw extrusion machine is used for extrusion, then a pelleting machine is used for pelleting, thus obtaining blended particle; the blended particle is pressed into plates by virtue of a flat high temperature pressing machine, and chips on the surface of plates are removed by adopting 80#-600# sand paper, thus obtaining the required superhydrophobic self-cleaning material. The superhydrophobic self-cleaning material obtained by adopting the method provided by the invention can realize good superhydrophobic and self-cleaning effects, and meanwhile processing method is simple, and application prospect and economic value are good.

Description

technical field [0001] The invention relates to a preparation method of a self-cleaning polymer material with a superhydrophobic surface, belonging to the technical field of material surface modification. Background technique [0002] The surfaces of many objects in nature have superhydrophobic and self-cleaning functions, such as butterfly wings, lotus leaves and leaves of many other plants. Among them, the most famous is the superhydrophobic phenomenon on the surface of lotus leaves. The water droplets on the surface of the lotus leaf are basically spherical. These water droplets cannot stay on the surface of the lotus leaf stably. The lotus leaf only needs to be tilted at a small angle, and the water droplets will roll down from the surface of the lotus leaf. Take away the dust and other pollutants on the surface of the lotus leaf, so as to keep the surface of the lotus leaf clean. This self-cleaning phenomenon on the surface of the lotus leaf is called the lotus leaf ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L83/04C08K13/06C08K9/02C08K3/04C08K5/14C09C1/46C09C3/06B29C47/92B29C48/92
CPCB29C48/04B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895
Inventor 郭卫红高磊陈冠龙牟海燕周建刚蔡伟张桂新
Owner EAST CHINA UNIV OF SCI & TECH
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