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Microgel particle of bowl structure as well as preparation method and application of microgel particle

A technology of microgel particles and microgels, applied in chemical instruments and methods, colloid chemistry, colloid chemistry and other directions, can solve the problems of complex process, complex and tedious synthesis steps and processes, and not simple enough, so as to improve the adhesion ability, The effect of structure and performance tunable

Active Publication Date: 2019-06-21
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen that the preparation of microgel materials with special and irregular structures, morphologies and properties is still one of the research difficulties in the field of materials science today. Synthesis requires the manufacture of silica templates with periodic bowl-shaped structures. The route is long, the process is complicated, the cost is high, and it is not simple enough.
At present, there is still a lack of a simpler and more convenient technical method to prepare polymer microgel materials with special and special-shaped structures, morphologies and properties to meet the needs of photonic crystals, catalysis, adsorption and sensing fields.

Method used

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  • Microgel particle of bowl structure as well as preparation method and application of microgel particle
  • Microgel particle of bowl structure as well as preparation method and application of microgel particle
  • Microgel particle of bowl structure as well as preparation method and application of microgel particle

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Experimental program
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Effect test

Embodiment 1

[0041] (1) According to the formula in Table 1, the monomer N-isopropylacrylamide (M 1 ), Acrylic (M 2 ), crosslinking agent N,N'-methylenebisacrylamide (M 3 ) was dissolved in water, and potassium persulfate was used as an initiator to obtain a dispersion solution of microgel particles through emulsion polymerization at 70° C., and dialyzed in deionized water to remove unreacted monomers and other water-soluble small molecules; the obtained microgel The particle size of the particles is 520nm;

[0042] (2) Soak the gold-plated glass piece in polyethyleneimine (M w =25 000, the solution concentration is 2mg L -1 ) in an aqueous solution for 5 minutes, self-assembled and adsorbed a polyethyleneimine layer, and dried with nitrogen; then soaked the polyethyleneimine-modified matrix into the microgel particle dispersion (0.02mg mL -1 ) for 5 minutes, the microgel particles are adsorbed to the surface of the matrix through electrostatic interaction and hydrogen bond interaction...

Embodiment 2

[0046] (1) According to the formula in Table 1, the monomer N-hydroxyethylacrylamide (M 1 ), methacrylic acid (M 2 ), crosslinking agent N,N'-ethylenediylbisacrylamide (M 3 ) was dissolved in water, and potassium persulfate was used as an initiator to obtain a dispersion solution of microgel particles through emulsion polymerization at 70° C., and dialyzed in deionized water to remove unreacted monomers and other water-soluble small molecules; the obtained microgel The particle size of the particles is 405nm;

[0047] (2) Soak the silicon wafer in polyethyleneimine (M w =25 000, the solution concentration is 2mg L -1 ) in an aqueous solution for 5 minutes, self-assembled and adsorbed a polyethyleneimine layer, and dried with nitrogen; then soaked the polyethyleneimine-modified matrix into the microgel particle dispersion (0.04mg mL -1 ) for 5 minutes, the microgel particles are adsorbed to the surface of the matrix through electrostatic interaction and hydrogen bond intera...

Embodiment 3

[0050] (1) According to the formula in Table 1, the monomer N-(methylol)acrylamide (M 1 ), 2-acrylamide-2-methylpropanesulfonic acid (M 2 ), crosslinking agent N,N'-methylenebisacrylamide (M 3 ) was dissolved in water, and potassium persulfate was used as an initiator to obtain a dispersion solution of microgel particles through emulsion polymerization at 70° C., and dialyzed in deionized water to remove unreacted monomers and other water-soluble small molecules; the obtained microgel The particle size of the particles is 290nm;

[0051] (2) Soak the glass piece in polyethyleneimine (M w =25 000, the solution concentration is 2mg L -1 ) in an aqueous solution for 5 minutes, self-assembled and adsorbed a polyethyleneimine layer, and dried with nitrogen; then soaked the polyethyleneimine-modified matrix into the microgel particle dispersion (0.06mg mL -1 ) for 5 minutes, the microgel particles are adsorbed to the surface of the matrix through electrostatic interaction and hy...

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Abstract

The invention belongs to the field of preparation of microgel and colloidal particles and particularly relates to a microgel particle of bowl structure and a preparation method of the microgel particle. Firstly, the microgel particle prepared through copolymerization of traditional free radical emulsion in a solution is adsorbed to different substrate surfaces (gold, silicon slice, glass sheet, mica and resin surfaces) modified with polyethyleneimine; then, substrates loaded with microgel are soaked in different saline solutions of Bi, because of coordinated complexation and electrostatic interaction of Bi<3+> and functional groups on microgel network structures, the shape of the microgel changes on the limited substrate surfaces and changes from a spherical shape into a bowl shape, the bowl-shaped microgel is sized after annealing treatment, the ordered microgel of the bowl structure is obtained, and the microgel of the special structure and morphology can be used for the fields suchas drug controlled release, photonic crystals, catalysis, adsorption, sensing and the like.

Description

technical field [0001] The invention belongs to the field of preparation of polymer microgels and colloidal particles, and in particular relates to a microgel particle with a bowl-shaped structure and morphology and a simple and convenient preparation method and application thereof. Background technique [0002] Polymer microgel is a kind of polymer particles with a cross-linked network structure. Due to its simple preparation method, it is easy to introduce reactive groups, and by choosing a suitable polymerization method, it can effectively control its size in the nanometer and micrometer range. Size, and more importantly, microgels have obvious volume changes to external stimuli such as temperature, pH value, ionic strength, light, electricity, and magnetism. Such substances have high water content, biocompatibility, and adjustable chemical and physical properties, so they have attracted more and more attention. The preparation of microgel materials with special and irre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30B01J13/00C08F220/06C08F220/54C08F222/38C08F220/58C08F220/56C08F228/02C08F8/42
Inventor 曹峥李丹王浩陈玉园张成刘春林吴盾成骏峰
Owner CHANGZHOU UNIV
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