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Method for preparing layer-layer assembled microcapsule based on host-guest interactions

A microcapsule, host-guest technology, applied in the field of preparation of polymer hollow microcapsules, can solve the problems of microcapsule stability influence, single action force, microcapsule response diversification limit, etc., and achieve the effect of broad potential application value

Inactive Publication Date: 2009-06-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned hollow microcapsules formed based on the weak interaction force have a single force, which greatly affects the stability of the microcapsules, and the diversity of microcapsule responsiveness is also limited.

Method used

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  • Method for preparing layer-layer assembled microcapsule based on host-guest interactions
  • Method for preparing layer-layer assembled microcapsule based on host-guest interactions
  • Method for preparing layer-layer assembled microcapsule based on host-guest interactions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Place calcium carbonate particles in a 1.5mL centrifuge tube, wash with water 3 times, add 1mL aqueous solution of polyallylamine grafted β-cyclodextrin with a concentration of 5mg / mL, and ultrasonically vibrate the centrifuge tube. After 10 minutes, centrifuge and wash with water for 3 times to remove excess polyallylamine grafted β-cyclodextrin, thereby adsorbing a layer of polyallylamine grafted β-cyclodextrin on the surface of calcium carbonate particles .

[0031] 2) Disperse the calcium carbonate particles adsorbed with a layer of polyallylamine-grafted β-cyclodextrin obtained in step 1) in ethanol, and add 1 mL of polyallylamine-grafted ferrocene with a concentration of 5 mg / mL methanol solution, shake the centrifuge tube. After 10 minutes, centrifuge and wash with ethanol three times to remove excess polyallylamine-grafted ferrocene, and obtain a polymer film based on the host-guest interaction between β-cyclodextrin and ferrocene.

[0032] 3) Repeat steps ...

Embodiment 2

[0034] 1) Place the calcium carbonate particles in a 1.5mL centrifuge tube, wash with water three times, add 1mL of an aqueous solution of polyallylamine grafted β-cyclodextrin with a concentration of 10mg / mL, and shake the centrifuge tube. After 5 minutes, centrifuge and wash with water for 3 times to remove excess polyallylamine grafted β-cyclodextrin, thereby adsorbing a layer of polyallylamine grafted β-cyclodextrin on the surface of calcium carbonate particles .

[0035] 2) Disperse the calcium carbonate particles adsorbed with a layer of polyallylamine grafted β-cyclodextrin obtained in step 1) in ethanol, add 1 mL of polyallylamine grafted ferrocene with a concentration of 10 mg / mL methanol solution, shake the centrifuge tube. After 5 minutes, it was centrifuged and washed with ethanol for 3 times to remove excess polyallylamine-grafted ferrocene to obtain a polymer film based on the host-guest interaction between β-cyclodextrin and ferrocene.

[0036]3) Repeat steps ...

Embodiment 3

[0038] 1) Place the calcium carbonate particles in a 1.5 mL centrifuge tube, wash with water three times, add 1 mL of an aqueous solution of polyallylamine grafted β-cyclodextrin with a concentration of 1 mg / mL, and shake the centrifuge tube. After 30 minutes, centrifuge and wash with water for 3 times to remove excess polyallylamine grafted β-cyclodextrin, thereby adsorbing a layer of polyallylamine grafted β-cyclodextrin on the surface of calcium carbonate particles .

[0039] 2) Disperse the calcium carbonate particles adsorbed with a layer of polyallylamine-grafted β-cyclodextrin obtained in step 1) in ethanol, and add 1 mL of polyallylamine-grafted ferrocene with a concentration of 1 mg / mL methanol solution, shake the centrifuge tube. After 30 minutes, centrifuge and wash with ethanol three times to remove excess polyallylamine-grafted ferrocene, and obtain a polymer film based on the host-guest interaction between β-cyclodextrin and ferrocene.

[0040] 3) Repeat steps ...

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Abstract

The invention discloses a method for preparing a layer-layer assembling microcapsule based on interaction of subject and object. The method obtains a microcapsule having multilayer structure, which capsule wall has interaction of subject and object by the steps of: forming a multilayer film on a surface of a colloidal particle in a manner of self-assembling layer upon layer, by the interaction of subject and object of beta-cyclodextrin and dicyclopentadienyl iron in polyallylamine grafting beta--cyclodextrin and polyallylamine grafting dicyclopentadienyl iron, based on the colloidal particle as a template; and removing the colloidal particle. Attractive force of the interaction of subject and object and electrostatic repulsive force of identical electrical charges exist in the capsule wall, so that relative size of the two forces can be controlled by changing chemical environment condition of the microcapsule such as PH value, ionic strength, molecular concentration of free subject and the like, thus controllable variation of the microcapsule size can be easily achieved. The method for preparing the microcapsule of the invention has extremely abroad latent applied cost in nanometer materials, drug releasing, biosensor, etc.

Description

technical field [0001] The invention relates to a method for preparing polymer hollow microcapsules, in particular to a method for preparing layer-layer assembled microcapsules by utilizing host-guest interaction. Background technique [0002] A microcapsule is a substance that separates the space inside the capsule from the space outside the capsule by a film-forming substance to form a specific geometric structure, and its interior can be filled or hollow. The shape of the microcapsules is mainly spherical, and can also be oval, square or rectangular, polygonal and various irregular shapes. The size of traditional microcapsules is usually on the order of microns to millimeters, and the wall thickness is from submicron to hundreds of microns. According to the principle of capsule wall formation, the traditional preparation methods of microcapsules can be roughly divided into three categories: chemical methods that use reactions to form capsule walls, physical and chemical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/10
Inventor 高长有王志鹏封志强
Owner ZHEJIANG UNIV
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