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Method for preparing non-spherical particles with surface wrinkles

A particle and wrinkle technology, applied in the direction of coating, etc., can solve the problems of high cost, difficult silane modifier modification, and easy safety hazards

Active Publication Date: 2017-05-31
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In the above-mentioned documents, documents 1, 2, and 3 adopt the method of dispersion polymerization, which generally uses alcohol-water mixture as the dispersed phase, which is costly and prone to safety hazards in the production process; the prepared products are generally about 2-5 μm , and most of the use of inert solvents needs to be accompanied by the use of dispersants; Documents 4 and 5 adopt the method of emulsion polymerization, which uses divinylbenzene monomers as crosslinking monomers, and the surface lacks active functional groups, so it is difficult to use silanes Modifiers to modify

Method used

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  • Method for preparing non-spherical particles with surface wrinkles
  • Method for preparing non-spherical particles with surface wrinkles
  • Method for preparing non-spherical particles with surface wrinkles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: PS / P (S-MPS) composite particle emulsion

[0041] (1) Weigh 40g polystyrene (PS) microsphere emulsion (2.5wt%), join in the dry three-neck round bottom flask that stirrer is housed, the mechanical stirring speed is set to 300rpm; After mechanical stirring 0.5h, add 1-4g of p-xylene, swelling at room temperature for 18h.

[0042] (2) Place the three-necked flask in a constant temperature water bath, set the temperature at 70°C, and wait for the system to pass through N 2 After exhausting the air, add a mixed solution of 1mL styrene (St), 0.1mL 3-(trimethoxysilyl) methyl methacrylate (MPS) and 0.01g azobisisobutyronitrile (AIBN), and polymerize 12h.

[0043] (3) After the synthesis, centrifuge washing with ultrapure water for 3 times and redisperse to obtain PS / P (S-MPS) composite microparticle emulsion.

[0044] Such as figure 1 Shown is a schematic diagram of the present invention.

[0045] Such as figure 2 As shown, it can be seen that the PS / P (S-...

Embodiment 2

[0047] Example 2: Two-component composite particle PS / P(S-MPS)@PS

[0048] (1) Take 20g PS / P (S-MPS) composite particle emulsion (2.5wt%) and 5g polyvinylpyrrolidone (PVP) aqueous solution (5wt%) respectively, and place in a dry three-necked flask equipped with a stirring device , the mechanical stirring speed is set at 300rpm; after mechanical stirring and dispersion for 0.5h, add a certain amount of styrene (St) monomer and 1wt% (relative to the quality of St) azobisisobutyronitrile (AIBN) mixed solution, Swell at room temperature for 24h.

[0049] (2) The three-neck flask was placed in a constant temperature water bath, the temperature was set at 70° C., and the polymerization was carried out for 12 hours.

[0050] (3) After the synthesis, it was washed three times with ultrapure water and redispersed to obtain the regrown PS / P(S-MPS) composite particle emulsion, which was denoted as PS / P(S-MPS)@PS.

[0051] Such as image 3 As shown, it can be seen that the prepared PS / ...

Embodiment 3

[0052] Embodiment 3: Utilize PS / P (S-MPS) composite particle emulsion to prepare hydrophobic coating

[0053] Weigh 0.1g of dry PS / P (S-MPS) composite particles and disperse them in 10g of ethanol, add 0.3mL of ammonia water and stir magnetically at 600rpm, add 20μL of perfluorodecyltrimethoxysilane (PFTMS) and 5g of ethanol The mixed solution was stirred and reacted at room temperature for 4 h. The prepared sample was centrifuged and washed 3 times with ethanol, and prepared into an emulsion with a solid content of 3 wt%. Measure 100 μL of 3wt% emulsion, drop it on a pre-treated 2.5×2.5cm glass slide, spread it flat, wait for the ethanol to volatilize naturally, and the particles rely on gravity and capillary force between particles to deposit and assemble to form a composite particle coating. Sinter at 105°C for 10 minutes, cool to room temperature naturally, and set aside.

[0054] The contact angle of the microparticle coating was tested by the pendant drop method to dete...

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PUM

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Abstract

The invention discloses a method for preparing non-spherical particles with surface wrinkles and belongs to the technical field of macromolecular microsphere materials. According to the method for preparing the non-spherical particles with surface wrinkles, disclosed by the invention, the non-spherical particles are obtained through one-step seed emulsion polymerization in a manner of taking non-crosslinked polymer microspheres as seeds and taking an inert solvent as a swelling agent. Superhydrophobic coatings can be prepared from the particles through surface fluorosilicone modification or bi-component composite particles can be prepared from the particles through a phase separation method.

Description

technical field [0001] The invention relates to a method for preparing non-spherical particles with surface wrinkles, and belongs to the technical field of polymer microsphere materials. Background technique [0002] Polymer microsphere materials are a branch of nanotechnology that has developed rapidly in recent decades. Scientists have been paying more attention to the control of the shape and size of microspheres in one-dimensional, two-dimensional and three-dimensional scales. Anisotropic particles have asymmetry in morphology or chemical composition, and their unique properties and broad application prospects (such as molecular recognition, drug sustained release, smart materials, biological materials and new particle emulsifiers, etc.), make It has become a hot spot in the field of polymer microsphere research in the future. [0003] At present, the phase separation method is the most widely used method for preparing anisotropic particles. Within a certain temperature...

Claims

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Application Information

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IPC IPC(8): C08F257/02C08F230/08C08F212/08C08F285/00C08F2/22C09D151/00
CPCC08F2/22C08F257/02C08F285/00C09D151/003C08F230/08C08F212/08
Inventor 王利魁李洪萍陈泽锐方坤林姚伯龙
Owner JIANGNAN UNIV
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