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Method for preparing nucleocapsid type microgel composite microsphere using polymeric 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: 2008-12-31
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Examples

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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 a...

Embodiment 2

[0076] Taking the polymerizable surfactant acrylamidopropyl dodecyl dimethyl ammonium bromide 0.21g as an example for preparing microgel composite microspheres as an example, other raw materials and preparation methods thereof 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'-methylenebisacryloyl an...

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'-methylenebisacryloyl an...

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Abstract

The invention provides a method for preparing core-shell microgel composite microspheres by adopting a polymerizable surfactant, which comprises the process steps as follows: preparing an oil phase, preparing a homogeneously dispersed oil phase, preparing a water phase, preparing a microgel, preparing a swollen microgel, preparing a porous microgel, preparing a porous microgel containing a polymerizable surfactant acrylamide-propyl-dodecyl-dimethyl-ammonium bromide, and preparing the microgel composite microspheres. The method has the advantages of reasonable design, feasible process, simple operation, reaction under the normal temperature, etc. The microgel composite microspheres prepared by adopting the method is characterized by core-shell structure, larger size which facilitates separation, large specific surface, reversible swelling and deswelling, and has phosphotungstic acid on the surface, thus the core-shell microgel composite microspheres can be popularized and applied in the fields of structural catalyst preparation, rapid enrichment, separation, etc.

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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IPC IPC(8): B01J13/10
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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