Elastic hollow polymer microspheres with microchannels on surfaces as well as preparation method and application of microspheres

A technology of elastic microspheres and polymers, applied in the field of polymer functional materials, can solve the problems of being unsuitable for industrial production, inconvenient operation methods, increasing the difficulty and uniformity of preparation methods, and achieving good light scattering and good versatility , universal and simple effect

Active Publication Date: 2018-06-08
GUANGZHOU BLUE MOON IND
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the suspension polymerization method, the template method, and the self-assembly method need to go through high temperature, calcination, organic solvent swelling or etching in the preparation process, and there are many inconveniences in the operation method, which is not suitable for industrial production.
The preparation process of surface non-permeable hollow or porous microspheres is prepared after plugging the pores on the surface of the microspheres. Because the pores before plugging are relatively large, reaching micron level, their permeability is very obvious without plugging. However, the plugging step increases the operational difficulty and uniformity of the preparation method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Elastic hollow polymer microspheres with microchannels on surfaces as well as preparation method and application of microspheres

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0058] In a preferred embodiment of the present invention, the preparation method includes the following steps: first add the organic solvent to the aqueous solution in which the protective colloid is dissolved, stir at room temperature to disperse the organic solvent into micro droplets, and gradually increase the temperature. And drop a mixed solution of polymerized monomer, initiator and crosslinking agent into the system. By controlling the amount of organic solvent, the polymerization reaction is gradually carried out on the surface of the organic solvent microdroplets to form a cross-linked polymer shell layer. In the initial stage of the formation of the polymer shell layer, by adjusting the temperature of the system, the organic solvent wrapped in the polymer shell layer is slowly volatilized to form hollow polymer microspheres with micropores on the surface. The product is filtered, washed, air-dried, and vacuum-dried, and then subjected to a flotation-drying process t...

Embodiment 1

[0079] A method for preparing cross-linked polystyrene-n-butyl acrylate hollow polymer elastic microspheres with micropores on the surface, the specific operation steps are as follows:

[0080] (1) Place a reactor equipped with a stirrer and reflux condenser in a water bath, and add 3wt% polyvinyl alcohol 1788 (molecular weight 1700, alcoholysis degree 88%) aqueous solution 300.0 to the reactor successively. g and 43.7g isooctane (boiling point 99.3°C), adjust the stirring speed to 500rpm, stir at room temperature for 10 minutes, start to increase the temperature and stabilize the system temperature at 71°C to form a stable oil-in-water microdroplet suspension.

[0081] (2) Place 23.7g of n-butyl acrylate, 23.0g of styrene and 9.3g of divinylbenzene in a beaker, and add 0.7g of azobisisobutyronitrile, and stir until the azobisisobutyronitrile is completely dissolved and form Uniform mixed solution.

[0082] (3) At 71°C, use a syringe pump to drop the mixed solution of step (2) into ...

Embodiment 2

[0090] A method for preparing crosslinked polymethyl methacrylate-n-butyl acrylate hollow polymer elastic microspheres with micropores on the surface, the specific operation steps are as follows:

[0091] (1) Place a reactor equipped with a stirrer and a reflux condenser in a water bath, and add 0.5wt% of polyvinyl alcohol 1788 (molecular weight 1700, alcoholysis degree 88%) aqueous solution to the reactor successively 300.0g and 16g n-hexane (boiling point 68.7°C), adjust the stirring speed to 900rpm, stir at room temperature for 10 minutes, start to increase the temperature and stabilize the system temperature at 49°C to form a stable oil-in-water microdroplet suspension.

[0092] (2) Put 5.8g of n-butyl acrylate, 11.6g of methyl methacrylate and 4.0g of dicyclopentadiene in a beaker, and add 0.3g of azobisisoheptonitrile, and stir until the azobisisoheptonitrile dissolves Complete, forming a homogeneous mixed solution.

[0093] (3) At 49°C, use a syringe pump to drop the mixed so...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention discloses elastic hollow polymer microspheres with microchannels on surfaces as well as a preparation method and an application of microspheres. The microspheres are elastic hollow microspheres, a shell is a crosslinked polymer, the microchannels are formed on surfaces, the particle size of the elastic microspheres is 1-300 mu m, the thickness of the shell is 0.01-100 mu m, and the diameter of the microchannels is smaller than or equal to 0.05 mu m. The microspheres have elastic restorability, and after cavities of the elastic hollow polymer microspheres are filled with some substances, the substances in the cavities can be slowly released via the microchannels of the microspheres without external forces; the microspheres have elastic deformation and substances in the cavities are released quickly under the action of external forces; the deformed microspheres can restore when the external forces are removed. The microspheres belong to a macromolecular polymer material, have low density, good thermal insulation, sound insulation, light scattering performance and the like and can be widely applied to fields of medical treatment, cosmetics, cleaning / caring supplies (suchas cleaning agents, caring agents and the like), sewage treatment, catalyst loading and the like.

Description

Technical field [0001] The invention relates to a hollow polymer elastic microsphere with micropores on the surface, a preparation method and application thereof, and belongs to the field of polymer functional materials. Background technique [0002] Hollow polymer microspheres are microspheres with a polymer shell layer and a cavity structure inside. The microspheres have low density, thermal insulation, sound insulation, and good light scattering properties, and are widely used in catalyst loading , Drug sustained release, cosmetic coating, sewage treatment and other fields. [0003] At present, the main methods for preparing hollow polymer microspheres include suspension polymerization, self-assembly, and solvent volatilization, as well as acid-base swelling, emulsion polymerization, and template methods. For the suspension polymerization method, firstly, the Pickering emulsification method is used to prepare W / O-type small droplets, and then these small droplets are dispersed ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F212/08C08F232/08C08F2/20C08J9/28
CPCC08F2/20C08F212/08C08F220/14C08F220/18C08F232/08C08J9/286C08J2201/0462C08J2205/044C08J2325/08C08J2333/08C08J2333/12C08J2345/00C08F220/1804C08F220/1802C08F212/36
Inventor 蒋赞郑翔龙
Owner GUANGZHOU BLUE MOON IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap