Method for preparing surface patterned SiO2 high molecular composite microsphere

A technology of silicon dioxide and composite microspheres, applied in the field of chemistry or physics, can solve the problems of complex preparation process of layer-by-layer assembly method, difficult to form single type particles, difficult to form structural composite materials, etc., and achieves feasible process and low quality. , the effect of short response time

Inactive Publication Date: 2006-11-22
SHAANXI NORMAL UNIV
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AI Technical Summary

Problems solved by technology

[0003] The disadvantages of the preparation methods of the above three silica composite materials are: the composite microsphere material synthesized by the sol-gel method is not easy to form a single type of particle, and the dispersion is not good; the preparation process of the layer-by-layer assembly method is complicated, and the preparation The structure of the material is loose and the stability is not high; the mixed copolymerization method of silica sol and polymer monomer makes it difficult to form a structural composite material with organic components and inorganic components
[0005] Based on literature reports, it has not been found that the prepared composite microspheres have both structure and surface patterning formed by nano-silica, which limits the application of such composite microspheres.

Method used

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  • Method for preparing surface patterned SiO2 high molecular composite microsphere
  • Method for preparing surface patterned SiO2 high molecular composite microsphere
  • Method for preparing surface patterned SiO2 high molecular composite microsphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1. Preparation of mixed surfactants

[0041] Mix Span-80 and Tween-80 at a weight ratio of 5:1 to prepare a mixed surfactant.

[0042] 2. Preparation of synthetic template oil phase

[0043] Add the mixed surfactant prepared in step 1 into a three-necked flask filled with n-heptane, and mix the mixed surfactant and n-heptane at a weight ratio of 1:122 to prepare a synthetic template oil phase.

[0044] 3. Preparation of emulsion

[0045] Put the synthetic template oil phase prepared in step 2 into a three-necked flask, stir with a stirrer at a stirring speed of 360-400 rpm, and inject N at a flow rate of 2-3 mL / min. 2 , emulsified at 25°C for 40-60 minutes to make an emulsion.

[0046] 4. Preparation of water phase

[0047] Mix N,N'-methylene dienamide, ammonium persulfate, and N-isopropylacrylamide in a molar ratio of 1:1.17:28.3, stir evenly, and prepare solution A. The molar ratio of acrylic acid and NaOH is 1:0.6 to prepare acrylic acid aqueous solution with a ...

Embodiment 2

[0057] In this embodiment, in step 2 of the process of preparing the synthetic template oil phase, the mixed surfactant and n-heptane were mixed at a weight ratio of 1:115 to prepare the synthetic template oil phase. In the process step 3 of preparing the emulsion, the emulsification temperature is 18°C. In step 4 of the preparation of the aqueous phase, the molar ratio of acrylic acid and NaOH is 1:0.3 to prepare an aqueous acrylic acid solution with a concentration of 23%. In Step 6 of the process for preparing the swollen copolymerized microgel, the microgel was swelled with ammonia water at a concentration of 9%. In step 8 of the process of preparing surface-patterned silica polymer composite microspheres, the reaction temperature is 18°C. Other processing steps are identical with embodiment 1.

Embodiment 3

[0059] In this embodiment, in step 2 of the process of preparing the synthetic template oil phase, the mixed surfactant and n-heptane were mixed at a weight ratio of 1:130 to prepare the synthetic template oil phase. In the process step 3 of preparing the emulsion, the emulsification temperature is 30°C. In step 4 of the preparation of the aqueous phase, the molar ratio of acrylic acid and NaOH is 1:1 to prepare an aqueous acrylic acid solution with a concentration of 23%. In step 6 of the process of preparing the swollen copolymerized microgel, the microgel was swollen with ammonia water at a concentration of 28%. In step 8 of the process of preparing surface-patterned silica polymer composite microspheres, the reaction temperature is 34°C. Other processing steps are identical with embodiment 1.

[0060] In order to determine the best processing step of the present invention, the inventor has carried out a large amount of laboratory research tests, and various test situatio...

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Abstract

The invention relates to a method for preparing silica dioxide hollow microsphere with pattern on surface, comprising process of preparing mixed surface active agent, composite mould oil phase, emulsion, water phase, cogelled, swelling cogelled, mixing liquid of tetraethoxysilane and skellysolve C, silica dioxide high molecular compound microsphere with pattern on surface. The invention is characterized by rational design, feasible process, simple operation, normal reaction temperature and short reaction time. The prepared high molecular compound microsphere is characterized by rigid and stable inorganic material, flexible organic material, large specific surface area and smaller quantity, and wide application on biological medicine, damping of vibration, carrying catalyst, fast concentration and separation, sensing technology, environmental protection and ocean mining.

Description

technical field [0001] The invention belongs to the technical field of chemical or physical methods, and in particular relates to the manufacture of colloid chemical microcapsules or microspheres. Background technique [0002] Due to the special properties different from bulk materials, silica composite materials have become a large class of materials widely used in the field of colloid and material science. There are many preparation methods for silica composite materials at home and abroad, but there are mainly the following three types, namely sol-gel method, layer-by-layer assembly method, and mixed copolymerization method of silica sol and polymer monomer. [0003] The disadvantages of the preparation methods of the above three silica composite materials are: the composite microsphere material synthesized by the sol-gel method is not easy to form a single type of particle, and the dispersion is not good; the preparation process of the layer-by-layer assembly method is c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
Inventor 胡道道杨菊香房喻白超良沈淑坤宋少飞李红
Owner SHAANXI NORMAL UNIV
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