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Preparation method of zinc oxide ternary compound nano material with yolk-eggshell structure

A zinc oxide nanometer and eggshell technology, which is applied in the preparation of microspheres, microcapsule preparations, etc., achieves the effects of simple method, stable morphology and strong controllability

Inactive Publication Date: 2014-09-10
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method has a simple reaction process and mild conditions, and effectively overcomes the shortcomings of the existing preparation technology such as complex process, long time consumption, and difficult composition adjustment.

Method used

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  • Preparation method of zinc oxide ternary compound nano material with yolk-eggshell structure
  • Preparation method of zinc oxide ternary compound nano material with yolk-eggshell structure

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Synthesis of oleic acid-modified ZnO nanoparticles: (1) Add 5 mL oleic acid to 50 mL ethanol, premix and stir for 0.5 h, then add 1 g ZnO, mix vigorously and heat to 70 °C, react for 4 h, The precipitate obtained after cooling down was washed with ethanol and deionized water several times, and freeze-dried in a vacuum to obtain oleic acid-modified zinc oxide powder for future use.

[0024] Preparation of egg yolk-eggshell composite microspheres: 0.05 g of surfactant SDS was dissolved in 40 g of deionized water to form an aqueous phase; the oil phase was composed of zinc oxide nanoparticles modified with oleic acid, styrene monomer, hexadecane, TEOS And so on. The specific dosage is 0.055 g of zinc oxide nanoparticles, 8 g of styrene monomer, 0.24 g of hexadecane, and 1 g of TEOS. The oil phase mixture was added dropwise to the water phase under ultrasound, and after 30 min of stirring and pre-emulsification, the mixed system was further finely emulsified. The power of ...

Embodiment 2

[0026] Synthesis of oleic acid-modified ZnO nanoparticles: (1) Add 2 mL oleic acid to 50 mL ethanol, premix and stir for 0.5 h, then add 2 g ZnO, mix vigorously and heat to 80 °C, react for 6 h, The precipitate obtained after cooling down was washed with ethanol and deionized water several times, and freeze-dried in a vacuum to obtain oleic acid-modified zinc oxide powder for future use.

[0027]Preparation of egg yolk-eggshell composite microspheres: 0.10 g of surfactant SDS was dissolved in 40 g of deionized water to form an aqueous phase; the oil phase was composed of zinc oxide nanoparticles modified with oleic acid, styrene monomer, hexadecane, TEOS And so on. The specific dosage is 0.035 g of zinc oxide nanoparticles, 8 g of styrene monomer, 0.24 g of hexadecane, and 1 g of TEOS. The oil phase mixture was added dropwise to the water phase under ultrasound, and after 30 min of stirring and pre-emulsification, the mixed system was further finely emulsified. The power of t...

Embodiment 3

[0029] Synthesis of oleic acid-modified ZnO nanoparticles: (1) Add 2 mL oleic acid to 50 mL ethanol, premix and stir for 0.5 h, then add 2 g ZnO, mix vigorously and heat to 70 °C, react for 4 h, The precipitate obtained after cooling down was washed with ethanol and deionized water several times, and freeze-dried to obtain oleic acid-modified zinc oxide powder for future use.

[0030] Preparation of egg yolk-eggshell composite microspheres: the aqueous phase was formed by dissolving 0.10 g of surfactant sodium dodecylbenzene sulfonate CTMAB in 39 g of deionized water; the oil phase was formed by oleic acid modified zinc oxide nanoparticles, benzene Composed of ethylene monomer, hexadecane, TEOS, etc. The specific dosage is 0.035 g zinc oxide nanoparticles, 8 g styrene monomer, 0.5 g hexadecane, and 1 g TEOS. The oil phase mixture was added dropwise to the water phase under ultrasonic, and after 30 min of stirring and pre-emulsification, the mixed system was further ultrasonic...

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Abstract

The invention relates to a preparation method of a ternary organic-inorganic zinc oxide compound micro-ball with a yolk-eggshell structure. The preparation method comprises the following steps: decorating inorganic zinc oxide nano particles with oleinic acid; ultrasonically dispersing an oil phase in a water phase containing a surfactant to obtain a uniform and stable miniemulsion system, wherein the oil phase mainly comprises the zinc oxide nano particles, a precursor of silicon oxide, styrene and a co-stabilizer; carrying out polymerization and sol-gel reaction to obtain a compound micro-ball which takes polystyrene as the core and zinc oxide and the silicon oxide as the shell and has a certain cavity. By adjusting the particle size and surface characteristics of a capsule with the yolk-eggshell structure, medicines can be controlled to slowly release; the structure provides the sufficient storage space for functionalized carrier medicines (or fluorescent substances), and probably has a wide application prospect in fields of slow release of the medicines, imaging and the like.

Description

field of invention [0001] The invention belongs to the technical field of controllable preparation of organic-inorganic nanocomposite materials, and specifically relates to an inorganic hybrid material with a yolk-shell structure (yolk-shell structure), silicon dioxide wrapped zinc oxide as the shell, and a polymer of A method for preparing a composite microsphere with an inner core. Background technique [0002] At present, the method for preparing the Yolk-Shell structure mainly includes selective etching (Lou X W, Archer L A, Adv. Mater. , 2008, 20:1853), soft template method (Wu X J, Xu D S, Adv. Mater. , 2010, 22:1516; Wu X J, Xu D S , J. Am. Chem. Soc , 2009, 131:2774), shipbuilding in a bottle (Qiao Z A, Huo Q S, Chi M F, Veith G M, Binder A J, Dai S, Adv. Mater., 2012, 24:6017; Ding S, Chen J S, Qi G, Duan X, Wang Z, Giannelis E P, Archer L A , Lou X W, J. Am. Chem. Soc. , 2011, 133:21), Ostwald ripening (Yang H G, Zeng H C, J. Phys. Chem. B, 2004, 108:3492;...

Claims

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Application Information

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IPC IPC(8): B01J13/14
Inventor 王祎龙韩筱时东陆
Owner TONGJI UNIV
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