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Preparation method for polyallylamine-silicon oxide hybrid microcapsule with nano-scale capsule wall thickness

A polyallylamine and capsule wall thickness technology, which is applied in the preparation of microspheres, microcapsule preparations and other directions, can solve the problems of large mass transfer resistance, the wall thickness structure of hybrid microcapsules, etc. Simple and easy process, mild preparation conditions

Active Publication Date: 2016-03-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hybrid microcapsules prepared by the above method have a thicker wall and a denser structure, resulting in greater mass transfer resistance.

Method used

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  • Preparation method for polyallylamine-silicon oxide hybrid microcapsule with nano-scale capsule wall thickness
  • Preparation method for polyallylamine-silicon oxide hybrid microcapsule with nano-scale capsule wall thickness
  • Preparation method for polyallylamine-silicon oxide hybrid microcapsule with nano-scale capsule wall thickness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Step 1, preparing a calcium chloride solution with a concentration of 0.3M; preparing a sodium carbonate solution with an equimolar concentration to the calcium chloride solution; at a speed of 800r / min, pour the sodium carbonate solution into an equal volume of calcium chloride solution rapidly , reacted for 30s, centrifuged at a speed of 3000r / min, removed the supernatant and washed with deionized water; repeated centrifugation-washing, until the supernatant was free of sodium ions and chloride ions, calcium carbonate microspheres (CaCO 3 Microspheres);

[0021] Step 2: prepare a sodium silicate solution with a concentration of 0.03M, adjust the pH of the solution to 7.0; prepare a polyallylamine solution with a concentration of 0.2mg / mL, adjust the pH of the solution to 7.0; prepare a concentration of 0.01M Phosphoric acid Salt buffer solution, adjusting the pH of the solution to be 7.0;

[0022] Step 3. According to the mass ratio of 40:1, uniformly mix the polyall...

Embodiment 2

[0027] The steps of Example 2 are basically the same as those of Example 1, except that the concentration of the polyallylamine solution is 0.4 mg / mL, and a polyallylamine-silicon oxide hybrid with a wall thickness of 17.6 nm is finally obtained. Microcapsules. Figure 2(a) and Figure 2(b) are the AFM photographs of the polyallylamine-silicon oxide hybrid microcapsules prepared in Example 2 and the corresponding capsule wall thickness.

Embodiment 3

[0029] The steps of this Example 3 are basically the same as those of Example 1, except that the concentration of the polyallylamine solution is 0.8 mg / mL, and finally a polyallylamine-silicon oxide hybrid with a wall thickness of 17.2 nm is obtained. Microcapsules. Figure 3(a) and Figure 3(b) are the AFM photographs of the polyallylamine-silica hybrid microcapsules prepared in Example 3 and the corresponding capsule wall thickness.

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Abstract

The invention discloses a preparation method for polyallylamine-silicon oxide hybrid microcapsule with nano-scale capsule wall thickness. The preparation method comprises the following steps: forming a polyallylamine-dihydrogen phosphate coating on the surface of a calcium carbonate microsphere through interaction between polyallylamine and dihydrogen phosphate ions; inducing hydrolysis / polycondensation of the dihydrogen phosphate ions by using polyallylamine in the coating; and removing the calcium carbonate microsphere by using a disodium ethylene diamine tetraacetate solution so as to obtain the polyallylamine-silicon oxide hybrid microcapsule with nano-scale capsule wall thickness. According to the method, raw materials used in preparation are cheap and easily available; preparation conditions are mild; preparation process is simple and easily practicable; and regulation and control of the wall thickness of the hybrid microcapsule can be realized by changing the concentration of polyallylamine in the process of preparation.

Description

technical field [0001] The invention relates to a preparation method of a polyallylamine-silicon oxide hybrid microcapsule whose wall thickness is nanoscale, and belongs to the preparation technology of the hybrid microcapsule. Background technique [0002] As a new class of hollow materials, hybrid microcapsules have received more and more attention in recent years and are widely used in the fields of catalysis, sensing and drug release. In particular, hybrid microcapsules are widely used in the field of immobilized enzymes due to their cell-like structure. Enzyme molecules can be embedded into the hollow core of the hybrid microcapsule, and the semipermeable capsule wall allows the transfer of substrate / product across the capsule wall. By regulating the interaction of organic and inorganic components, the regulation of the physical / chemical structure of the microcapsule can be realized, and a suitable microenvironment can be provided for the enzyme molecule. At present, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J13/12
CPCB01J13/02B01J13/12
Inventor 姜忠义张少华石家福韩平平王雪艳
Owner TIANJIN UNIV
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