Preparation method of polymer micro-capsules inspired by polyphenols chemistry

A polyphenol chemistry and polymer technology, which is applied in the preparation of microspheres and microcapsule preparations, can solve the problems of preparing microcapsules by polyphenol chemistry, and achieve the effects of simple and easy preparation process, cheap preparation materials and mild preparation conditions.

Inactive Publication Date: 2015-06-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, to the best of our knowledge, there has been no report on the preparation of microcapsules based on polyphenol chemistry

Method used

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  • Preparation method of polymer micro-capsules inspired by polyphenols chemistry
  • Preparation method of polymer micro-capsules inspired by polyphenols chemistry
  • Preparation method of polymer micro-capsules inspired by polyphenols chemistry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1, preparation concentration is 0.33M calcium chloride solution, adds polystyrene sodium sulfonate (PSS) wherein, is made into the solution A that PSS concentration is 3mg / mL; Preparation and the sodium carbonate of the same molar concentration of calcium chloride solution Solution; each take 10mL of solution A and sodium carbonate solution, quickly pour the sodium carbonate solution into solution A at a speed of 800r / min, react for 30s, turn off the stirring and let it stand for 10min, then centrifuge at a speed of 3000r / min , washed with deionized water after removing the supernatant, and repeated centrifugation-water washing three times to obtain calcium carbonate microspheres doped with polystyrene sodium sulfonate (PSS-doped CaCO 3 Microspheres);

[0021] Step 2, prepare a Tris-HCl buffer solution with a concentration of 0.05M, and adjust the pH of the buffer solution to 8.0;

[0022] Step 3: Dissolve tannic acid (TA) in the Tris-HCl buffer solution prepared ...

Embodiment 2

[0026] The steps of this example are basically the same as those of Example 1, except that the concentration of TA in solution B prepared in step 3 is changed from 0.5 mg / mL to 1.0 mg / mL, and the particle size of the final prepared TA / PEI microcapsules The microcapsule is 4-5 microns, the thickness of the capsule wall is 392±31 nanometers, and the microcapsule remains spherical after freeze-drying. figure 2 In a) is the SEM photo of the TA / PEI microcapsule prepared in Example 2, and b) is the TEM photo of the TA / PEI microcapsule prepared in Example 2.

Embodiment 3

[0028]The steps of this example are basically the same as those of Example 1, except that the concentration of TA in solution B prepared in step 3 is changed from 0.5 mg / mL to 2.0 mg / mL, and the final prepared TA / PEI microcapsules have the following characteristics , the particle size is 4-5 microns, the thickness of the capsule wall is 486±46 nanometers, and the microcapsule remains spherical after freeze-drying. image 3 In a) is the SEM photo of the TA / PEI microcapsule prepared in Example 3, and b) is the TEM photo of the TA / PEI microcapsule prepared in Example 3.

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Abstract

The invention discloses a preparation method of polymer micro-capsules inspired by polyphenols chemistry. Based on polyphenols chemistry, the preparation of micro-capsules is carried out by taking calcium carbonate micro-spheres as templates, and tannic acid and polyethylene imine as raw materials. The tannic acid can be subjected to oxidative polymerization under the weak alkaline condition, a formed tannic acid oligomer can be adsorbed on the surfaces of the calcium carbonate micro-spheres, then the polyethylene imine is utilized for crosslinking the tannic acid oligomer to form a tannic acid oligomer / polyethylene imine coating, and finally the calcium carbonate micro-spheres are removed by utilizing ethylenediaminetetraacetic acid to obtain tannic acid oligomer / polyethylene imine polymer micro-capsules. According to the preparation method disclosed by the invention, the preparation raw materials are cheap and easy to obtain, the preparation conditions are mild, the preparation technology is simple and feasible, and the regulation and control of the morphology of the micro-capsules and the thickness of walls of the micro-capsules can be achieved by changing the concentration of the tannic acid and the concentration of the polyethylene imine in a preparation process.

Description

technical field [0001] The invention relates to the preparation of polymer materials, which is a preparation method of polymer microcapsules, in particular to the preparation and preparation method of polymer microcapsules inspired by polyphenol chemistry. Background technique [0002] As a new type of hollow material, microcapsules have been widely used in catalysis, separation, sensors, drug release and other fields due to their unique core-shell structure, high specific surface area and short mass transfer distance. At present, the preparation methods of microcapsules can be mainly divided into hard template method, soft template method and template-free method. Due to the advantages of simple operation, flexible and controllable reaction conditions, and uniform size of microcapsules, the hard template method is currently the most commonly used method for preparing microcapsules. The preparation of microcapsules by the hard template method can be divided into three steps...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14
CPCB01J13/14
Inventor 姜忠义张少华石家富王晓莉
Owner TIANJIN UNIV
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