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Method for preparing strawberry type inorganic particle-polyurea composite microspheres and super-hydrophobic coating thereof

A technology of inorganic particles and composite microspheres, applied in polyurea/polyurethane coatings, coatings, microsphere preparation, etc., can solve the problems of complex system components, cumbersome process steps, and long reaction time, and achieve the effect of simple system components

Active Publication Date: 2019-06-14
山东金昌树新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the problems of long reaction time, cumbersome process steps and complex system components in the preparation of strawberry-type composite microspheres in the prior art, the present invention provides a simple and rapid preparation of strawberry-type inorganic particle-polyurea composite microspheres and their ultra- Method of Hydrophobic Coating

Method used

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  • Method for preparing strawberry type inorganic particle-polyurea composite microspheres and super-hydrophobic coating thereof
  • Method for preparing strawberry type inorganic particle-polyurea composite microspheres and super-hydrophobic coating thereof
  • Method for preparing strawberry type inorganic particle-polyurea composite microspheres and super-hydrophobic coating thereof

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Experimental program
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Effect test

Embodiment 1

[0047] At room temperature, 14.6 g of water and 70.4 g of acetonitrile were added to a 120 mL reaction flask, followed by the addition of 5.0 g of an aqueous dispersion of silicon dioxide (the amount of silicon dioxide was 2.0 g, and the particle size was 160 nm) and 10.0 g Methylcyclohexyl diisocyanate monomer. After the system was mixed evenly, the reaction bottle was sealed and placed in a constant temperature water bath at 50°C for 60 minutes. The product was put into a centrifuge tube and centrifuged at 8000r / min for 4min, the obtained solid was washed twice with acetonitrile and then dried in an oven at 100°C for 2h to obtain strawberry-type silica-polyurea composite microspheres.

[0048] The yield of the obtained strawberry microspheres was 87.67%, the average particle size of the microspheres was 6.78 μm, and the polydispersity coefficient of the particle size was 1.006. The scanning electron microscope images of the microspheres are as figure 1 As shown, the left p...

Embodiment 2

[0051] At room temperature, 3.8g of water and 51.2g of acetonitrile were added to a 120mL reaction flask, followed by the addition of 15.0g of an aqueous dispersion of silicon dioxide (the amount of silicon dioxide was 6.0g, and the particle size was 340nm) and 30.0g Isophorone diisocyanate monomer. After the system was evenly mixed, the reaction bottle was sealed and placed in a constant temperature water bath at 70°C for 40 min. The product was subjected to suction filtration, and the obtained solid was washed twice with acetonitrile and then dried in an oven at 80° C. for 4 hours to obtain strawberry-shaped silica-polyurea composite microspheres.

[0052] The productive rate of gained strawberry type microsphere is 94.97%, and the average particle diameter of microsphere is 12.85 μ m, and particle diameter polydispersity coefficient is 1.010; The scanning electron micrograph of microsphere is as follows: image 3 shown.

[0053] The obtained strawberry-shaped microspheres...

Embodiment 3

[0055] At room temperature, 14.3g of water and 63.2g of acetonitrile were added to a 120mL reaction flask, followed by the addition of 2.5g of an aqueous dispersion of silicon dioxide (the amount of silicon dioxide was 1.0g, and the particle size was 160nm) and 20.0g 4,4'-dicyclohexylmethane diisocyanate monomer. After the system was uniformly mixed, the reaction bottle was sealed and placed in a constant temperature water bath shaker at 30° C. to react at 140 osc / min for 120 min. Put the product into a centrifuge tube and centrifuge at 12000r / min for 2min. The obtained solid was washed twice with acetonitrile and dried in an oven at 80°C for 4h to obtain strawberry-type silica-polyurea composite microspheres.

[0056] The yield of the obtained strawberry microspheres was 92.55%, the measured average particle size of the microspheres was 10.13 μm, and the polydispersity coefficient of the particle size was 1.008.

[0057] The strawberry-shaped microspheres were bonded to the ...

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Abstract

The invention relates to a method for preparing strawberry type inorganic particle-polyurea composite microspheres and a super-hydrophobic coating of the strawberry type inorganic particle-polyurea composite microsphere, which comprises the following steps: adding inorganic nanoparticles and a diisocyanate monomer into a reaction medium, and conducting precipitation polymerization to prepare the strawberry type composite microspheres, and uniformly coating the surface of a base material with the obtained microspheres to prepare the super-hydrophobic coating. The size and the surface roughnessof the obtained microspheres can be adjusted by simply changing the dosage of the inorganic particles and diisocyanate monomer, the reaction temperature and other conditions, so that the hydrophobic property of the strawberry type microsphere coating is adjusted. The method does not need any emulsifier, stabilizer or catalyst and the like; the strawberry-type composite microspheres can be preparedin one step without surface modification; the method has the characteristics of single system component, simple operation process, short time consumption and high microsphere yield, and the polymerization reaction can be carried out under the condition of standing without stirring, so that the production cost and the energy consumption are lower, and the large-scale production of the microspheresis facilitated.

Description

technical field [0001] The invention relates to a method for preparing a strawberry-shaped microsphere superhydrophobic material, in particular to a method for preparing a strawberry-shaped inorganic particle-polyurea superhydrophobic material by precipitation polymerization, and belongs to the technical field of superhydrophobic materials. Background technique [0002] When the contact angle of the material surface to water is greater than 150° and the rolling angle is less than 10°, the material is said to be superphobic. Strawberry-shaped microspheres refer to composite microspheres with a strawberry-shaped structure formed by attaching several nanoparticles to the surface of a larger particle. Such microspheres have a wide range of applications in the field of superhydrophobic materials due to their special micro-nano secondary structure and high specific surface area. [0003] The currently reported methods for preparing strawberry microspheres mainly include emulsion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D7/61C08G18/75C08G18/30B01J13/14
Inventor 姜绪宝孔祥正朱晓丽李树生
Owner 山东金昌树新材料科技有限公司
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