Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing hollow microsphere with hydrogel microsphere as stencil

A technology for hydrogel microspheres and microspheres, which is applied to the preparation of microspheres, microcapsule preparations, etc., can solve the problems of many steps and long time, and achieve the effects of safe preparation process and easy operation.

Inactive Publication Date: 2009-11-25
ZHEJIANG UNIV
View PDF9 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has many steps and takes a long time, and the process conditions such as pH value and temperature need to be strictly controlled in the final acid-base treatment.

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
  • Method for preparing hollow microsphere with hydrogel microsphere as stencil
  • Method for preparing hollow microsphere with hydrogel microsphere as stencil
  • Method for preparing hollow microsphere with hydrogel microsphere as stencil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Put 5.0g of N-isopropylacrylamide (NIPAAm), 0.05g of N,N'-methylenebisacrylamide (BIS) and 50g of deionized water into a 100ml flask and stir to dissolve, add 0.005g of hexadecyltri Methylammonium chloride, 0.25g methacryloyloxyethyltrimethylammonium chloride (DMC), after nitrogen gas flow for 60 minutes, add 0.05gN, N'-azobisisobutylamidine hydrochloride ( AIBA) raise the temperature of the oil bath to 75°C, turn on the condensing reflux device to react for 8 hours, naturally cool to room temperature and let stand for half an hour until it swells completely. After purification by dialysis and drying, 0.3 g of the product was taken in 50 ml of deionized water and redispersed by ultrasonic vibration to obtain a suspension of hydrogel microspheres. Put the hydrogel microsphere suspension into a 250ml Erlenmeyer flask as a seed, add 150ml ionized water, 0.05g sodium dodecyl sulfate (SDS) successively, stir and ventilate nitrogen for 60 minutes, then add 0.3g styrene ( St)...

Embodiment 2

[0030] Put 4.0g of N-isopropylacrylamide (NIPAAm), 0.04g of BIS and 800g of deionized water into a 1000ml flask and stir to dissolve, add 0.4g of cetyltrimethylammonium chloride, 0.2g of styrene benzyl trimethyl Methyl ammonium chloride, after nitrogen gas for 60 minutes, then add 0.02g AIBA to raise the temperature of the oil bath to 60°C, turn on the condensing reflux device to react for 72 hours, naturally cool to room temperature and let it stand for half an hour until it is completely swollen, after dialysis and purification, After drying, 0.3 g of the product was taken and dispersed in 100 ml of deionized water to obtain a suspension of hydrogel microspheres. Put the hydrogel microsphere suspension into a 250ml Erlenmeyer flask as a seed, add 150ml ion water, 0.15g sodium bis(2-ethylhexyl) sulfosuccinate, 2.0g St, 0.05gDVB and 0.05 gKPS, stirred and led to nitrogen for 10 minutes, then added 0.024g SSA to react for 1 hour, and obtained polystyrene hollow microspheres aft...

Embodiment 3

[0032] Put 5.0g of N-isopropylacrylamide (NIPAAm), 0.01g of BIS and 500g of deionized water in a 1000ml flask and stir to dissolve, add 1g of styrene benzyltrimethylammonium chloride, and after nitrogen gas for 60 minutes, add 0.005g AIBA Heat the oil bath to 60°C, turn on the condensing reflux device to react for 72 hours, naturally cool to room temperature and let stand for half an hour until it swells completely. After purification by dialysis and drying, 0.3 g of the product was taken and dispersed in deionized water to obtain a suspension of hydrogel microspheres. Take 50ml of the hydrogel microsphere suspension and put it into a 250ml Erlenmeyer flask as a seed, add 150ml of ionized water, 0.057gSDS, 10.0g styrene (St), 0.5g divinylbenzene (DVB) and 0.12gKPS successively, stir And logical nitrogen 10 minutes, add 0.06g sodium sulfite (SSA) reaction 1 hour again, obtain polystyrene hollow microsphere ( image 3 ).

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

No PUM Login to View More

Abstract

The invention discloses a method for preparing hollow microspheres by using hydrogel microspheres as templates. Its preparation method is: using emulsion or inverse emulsion polymerization to synthesize charged hydrogel microspheres, adding oppositely charged surfactants and hydrophobic monomers to the suspension of hydrogel microspheres, and passing Seed emulsion polymerization coats the polymer shell of hydrophobic monomer on the hydrogel microspheres to form core-shell microspheres with hydrogel as the inner layer and polymer as the outer layer; The hydrolysis of the body forms an outer layer of an inorganic shell, and an inner layer of a hydrogel core-shell microsphere. The core-shell microspheres are dried to obtain hollow microspheres. The method of the invention does not need to remove the template through organic solvent dissolution, strong acid and strong alkali etching or high-temperature calcination, the preparation process is safe, and the operation is simple, and hollow microspheres with different chemical compositions can be obtained by changing core and shell raw materials.

Description

technical field [0001] The invention relates to a method for preparing hollow microspheres using hydrogel microspheres as templates. Background technique [0002] Nanoscale and submicron-scale polymer hollow microspheres have received more and more attention in recent years, and they have broad application prospects in cosmetics, coatings, inks, biomedicine, and paper manufacturing industries. The successful development of hollow microspheres is one of the three major achievements that have changed the coatings industry in the past 40 years. Due to the hollow structure of the hollow particles, there is a large difference in the refractive index between the shell polymer and the inner core air, and multiple refractions occur when the light passes through the hollow microspheres, so the hollow microspheres have effective covering properties and can replace expensive As a white pigment, titanium dioxide can save costs and improve the stain resistance and wash resistance of coa...

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 Patents(China)
IPC IPC(8): B01J13/14
Inventor 彭懋陈颖王慧珺
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com