Preparation of organic-inorganic hybridized nanometer microcapsule with organic micromolecular hydrocarbon as model plate

A nano-microcapsule, small molecular hydrocarbon technology, applied in microcapsule preparations, microsphere preparation and other directions, can solve the problems of limited assembly efficiency, inability to stably disperse, limited application scope, etc., and achieves wide application scope, simple preparation process, permeability Properties controllable effects

Inactive Publication Date: 2005-10-12
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] For method (1), it is necessary to use living radical polymerization to synthesize block copolymers first, then self-assemble, use hydrolysis-condensation reactions to form inorganic phases, and then remove hydrophobic polymer cores. There are relatively many steps and there is an assembly efficiency. Limited problems; for method (2), the layer-by-layer self-assembly of polyelectrolytes also requires the step of removing the template, and because polyelectrolyte particles are easy to flocculate, they need to be carried out at extremely low concentrations, and cannot be stably dispersed in solvents, so Its scope of application is also limited; for method (3), although the synthesis is relatively simple, it is relatively difficult to remove the polymer template, and the separation of the removed polymer and microcapsules is also troublesome.
[0009] In addition, microcapsules were synthesized by novel emulsion polymerization methods, such as miniemulsion polymerization (Tiarks F, Landfester K, Antonietti M.Langmuir, 2001, 17:908-918), in situ hydrocarbon-based encapsulation (US 4,973,670,1990; McDonald C J , Bouck K J, Chaput A B, et al.Macromolecules, 2000, 33: 1593-1605), the preparation process is relatively simple, but there is no report on the synthesis of organic-inorganic hybrid microcapsules

Method used

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  • Preparation of organic-inorganic hybridized nanometer microcapsule with organic micromolecular hydrocarbon as model plate
  • Preparation of organic-inorganic hybridized nanometer microcapsule with organic micromolecular hydrocarbon as model plate
  • Preparation of organic-inorganic hybridized nanometer microcapsule with organic micromolecular hydrocarbon as model plate

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Effect test

Embodiment 1

[0044] Weigh 0.4 g of emulsifier sodium dodecyl sulfonate, 1 g each of pH buffering agents sodium dihydrogen phosphate and diammonium hydrogen phosphate; add to 1000 g of water to obtain an emulsifier solution with a pH value of 7. Mix 10g of octane, 0.6g of hexadecane, 1.5g of styrene, and 0.5g of 3-trimethoxysilyl propyl methacrylate, add them to the above-mentioned aqueous solution containing emulsifier and pH buffering agent, and ultrasonically shake the above-mentioned The mixed solution was dispersed to obtain a stable emulsion; the temperature was adjusted to 80°C, under the protection of nitrogen, 0.2 g of potassium persulfate was added to initiate polymerization, and after 45 minutes of reaction, it was kept at the reaction temperature for 60 minutes. The number-average particle diameter measured by a dynamic light scattering particle size analyzer is 51.2nm, and its morphology is observed by a transmission electron microscope, which shows that it is a hollow microcaps...

Embodiment 2

[0046] Weigh 4 g each of emulsifier sodium dodecyl sulfonate and OP-10, and 1 g each of pH buffer agents sodium dihydrogen phosphate and diammonium hydrogen phosphate; add 1000 g of water to obtain an emulsifier solution with a pH value of 7. Mix 200g of cyclohexane, 6g of hexadecane, 60g of styrene, and 40g of 3-trimethoxysilyl propyl methacrylate, add them to the above-mentioned aqueous solution containing emulsifier and pH buffering agent, and use ultrasonic waves to shake the above-mentioned mixture Disperse to obtain a stable emulsion; adjust the temperature to 50°C, under the protection of nitrogen, add 10 g of potassium persulfate to initiate polymerization, react for 240 minutes, and keep warm at the reaction temperature for 60 minutes. The number-average particle size measured by a dynamic light scattering particle size analyzer is 78.5nm, and its morphology is observed by a transmission electron microscope, which shows that it is a hollow microcapsule.

Embodiment 3

[0048] Weigh 1 g of emulsifier sodium dodecyl sulfonate, 40 g of pH buffer agent sodium acetate, and 10 g of acetic acid; add 1000 g of water to obtain an emulsifier solution with a pH value of 5. Mix 500g of pentane, 100g of cetyl alcohol, 490g of styrene, and 10g of methyltriethoxysilane, add them to the above aqueous solution containing emulsifier and pH buffer, and disperse the above mixed solution with ultrasonic waves to obtain a stable emulsion ; The temperature was adjusted to 25° C., and under the protection of nitrogen, 0.2 g of hydrogen peroxide and 0.8 g of ferrous chloride were added to initiate polymerization, and after 300 min of reaction, the temperature was kept at the reaction temperature for 60 min. The number-average particle diameter measured by a dynamic light scattering particle size analyzer is 115.8nm, and its morphology is observed by a transmission electron microscope, which is a hollow microcapsule.

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Abstract

A process using organic micro-molecular hydrocarbon as template for preparing the organic-inorganic hybridized nanosoftgel features that the organic micro-molecular hydrocarbon-solution drops are used as template, the vinyl monomer and the siloxane containing double bonds are copolymerized, and the hydrolysis-condensating reaction of the siloxane group is used to form the cross-linked shell. Its osmosis is regulatable.

Description

technical field [0001] The invention relates to a novel method for preparing organic-inorganic hybrid nano-microcapsules, in particular to a method for preparing organic-inorganic hybrid nano-microcapsules using small organic molecule hydrocarbons as templates. [0002] Using small organic molecule hydrocarbon droplets as a template, the method of miniemulsion polymerization is used to copolymerize vinyl monomers and siloxane monomers containing double bonds, and the hydrolysis of siloxane groups in siloxane monomers containing double bonds is used - Condensation reaction to form a cross-linked shell to obtain organic-inorganic hybrid nano-microcapsules. The invention only needs one-step reaction to obtain microcapsules with a size of about 60 nanometers and an organic-inorganic hybrid structure in a simple, effective and stable manner, and can control the permeability of the capsule wall. The microcapsules obtained by the present invention can be widely used in various occas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14
Inventor 单国荣倪克钒翁志学
Owner ZHEJIANG UNIV
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