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Method for preparing nucleocapsid type microgel composite microsphere using polymerisable surfactant

A technology of surfactants and composite microspheres, applied in the field of materials, can solve the problem of introducing such substances into the surface of microgels to form composite microspheres with a core-shell structure. problem, to achieve good swelling and deswelling reversible characteristics, large specific surface area, and feasible process

Inactive Publication Date: 2009-04-15
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many studies on introducing polymerizable surfactants into polymers or composite materials with different structural characteristics for different purposes, introducing such substances to the surface of microgels using polymer microgels as templates to form The study of shell-type structure composite microsphere materials has not been reported, because the core water-swellability of this material creates conditions for the storage of water-soluble substances, and the positively charged shell layer creates conditions for ion exchange to introduce negatively charged functional species. condition

Method used

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  • Method for preparing nucleocapsid type microgel composite microsphere using polymerisable surfactant
  • Method for preparing nucleocapsid type microgel composite microsphere using polymerisable surfactant
  • Method for preparing nucleocapsid type microgel composite microsphere using polymerisable surfactant

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Taking the polymerizable surfactant acrylamidopropyl dodecyl dimethyl ammonium bromide 0.026g as an example for preparing microgel composite microspheres as an example, other raw materials and preparation methods thereof are as follows:

[0059] 1. Preparation of oil phase

[0060] 0.52g of surfactant Span-80 was added into a beaker containing 70mL of cyclohexane, and the surfactant was mixed with cyclohexane in a weight ratio of 1:103 to form an oil phase.

[0061] 2. Preparation of uniformly dispersed oil phase

[0062] Put the oil phase prepared in step 1 into a three-necked flask, stir with a stirrer at a stirring speed of 380 rpm, and inject N at a flow rate of 2 to 3 mL / min. 2 , stirred and dispersed at 20°C for 50 minutes to prepare a uniformly dispersed oil phase.

[0063] 3. Preparation of water phase

[0064] Dissolve 1.2g of acrylamide, 0.05g of N,N'-methylenebisacrylamide, and 80mg of ammonium persulfate in 5.5mL of secondary water. The mass ratio of ami...

Embodiment 2

[0076] Taking 0.21 g of the polymerizable surfactant acrylamidopropyl dodecyl dimethyl ammonium bromide as the raw material used to prepare microgel composite microspheres as an example, other raw materials used and their preparation methods are as follows:

[0077]In step 1 of preparing the oil phase process, 0.52g of surfactant Span-80 was added to a beaker filled with 67mL of cyclohexane, and the surfactant was mixed with cyclohexane in a weight ratio of 1:100 to prepare the oil phase . In the process step 2 of preparing the uniformly dispersed oil phase, stirring and dispersing at 18°C ​​for 60 minutes, other steps in this process step were the same as in Example 1 to prepare a uniformly dispersed oil phase. In step 3 of the water phase preparation process, 1.2g of acrylamide, 0.04g of N,N'-methylenebisacrylamide, and 80mg of ammonium persulfate were dissolved in 5.5mL of secondary water, and the secondary water was mixed with acrylamide, N , The mass ratio of N'-methylen...

Embodiment 3

[0079] Taking the polymerizable surfactant acrylamidopropyl dodecyl dimethyl ammonium bromide 0.5g as an example for preparing microgel composite microspheres as an example, other raw materials and preparation methods thereof are as follows:

[0080] In step 1 of preparing the oil phase process, 0.52g of surfactant Span-80 was added to a beaker containing 76.8mL of cyclohexane, and the surfactant was mixed with cyclohexane in a weight ratio of 1:115 to prepare an oil Mutually. In the process step 2 of preparing the uniformly dispersed oil phase, stir and disperse at 30° C. for 30 minutes. Other steps in this process step are the same as in Example 1 to prepare a uniformly dispersed oil phase. In step 3 of the water phase preparation process, 1.2 g of acrylamide, 0.06 g of N, N'-methylenebisacrylamide, and 80 mg of ammonium persulfate were dissolved in 5.5 mL of secondary water, and the secondary water was mixed with acrylamide, N , The mass ratio of N'-methylenebisacrylamide ...

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Abstract

The invention discloses a method for preparing a nucleocapsid type microgel compound microsphere through a polymeric surfactant, which comprises the following process steps: preparing an oil phase, preparing an evenly-dispersed oil phase, preparing a water phase, preparing microgel, preparing swollen microgel, preparing porous microgel, preparing the porous microgel containing the polymeric surfactant of acrylamide propyl dodecyl dimethyl ammonium bromide, and preparing the microgel compound microsphere. The method has the advantages of reasonable design, feasible process, simple operation, reaction at room temperature, and the like. The microgel compound microsphere has the characteristics of nucleocapsid structure, has larger size, easy separation, a large specific surface, reversible swelling and shrinking, and phosphotungstic acid contained in the surface. The material can be popularized and applied in the fields of structural type catalyst preparation, quick enrichment and separation, and the like.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for manufacturing microcapsules or microspheres of colloid chemistry. Background technique [0002] Microgel is a kind of spherical latex particles with a three-dimensional network structure and a size in the order of micro and nanometers. The size, internal structure and types of functional groups contained in the microgel can be controlled by changing the monomer, crosslinker type and preparation conditions. Therefore, as a template for the preparation of spherical micro- and nano-scale materials, microgels have incomparable advantages over natural templates. At present, there are many researches on spherical micro-nano organic-inorganic composite materials at home and abroad. Pich et al. used soap-free emulsion polymerization to prepare acetoacetoxyethyl methacrylate (AAEM) and N-vinylcaprolactam (VCL) copolymer microgels, and then synthesized magnetit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
Inventor 李红胡道道张龙周彤杨菊香崔新爱沈淑坤
Owner SHAANXI NORMAL UNIV
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