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Method for preparing functional porous micro-spheres

A porous microsphere and functional technology, which is applied in the field of preparation of functional porous microspheres, can solve the problems of lack of active groups and the limitation of direct utilization of natural polymer porous microspheres, and achieves functional regulation and simple preparation process. Ease of operation and mild preparation conditions

Inactive Publication Date: 2016-07-20
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the surface of natural polymer porous microspheres prepared by prior art lacks active groups
Therefore, the direct utilization of natural polymer porous microspheres is limited

Method used

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  • Method for preparing functional porous micro-spheres
  • Method for preparing functional porous micro-spheres
  • Method for preparing functional porous micro-spheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1, prepare a kind of functional porous microsphere, the steps are as follows:

[0020] Step 1, prepare NaOH / urea aqueous solution, wherein, NaOH mass fraction is 8%, urea mass fraction is 4%; Add purified chitin powder 300mg to the NaOH / urea aqueous solution of 10g and obtain mixed solution A after dispersing evenly; Mixed solution A was freeze-thawed, that is, the mixed solution A was placed in a low-temperature constant temperature tank, frozen at -20°C for 10 h, and then thawed. After the freeze-thaw process was repeated 3 times, the mixed solution A was frozen in liquid nitrogen to fully dissolve the chitin powder, and the obtained Clear solution B.

[0021] Step 2: Prepare the isooctane / Span80 mixed solution, wherein the volume-mass ratio of isooctane to Span80 is 100:1mL / g; take 20mL of the isooctane / Span80 mixed solution, stir at 500rpm for 30min, and then add to step 1 to prepare solution B to obtain mixed solution C; put mixed solution C in an ice b...

Embodiment 2

[0024] Embodiment 2, prepare a kind of functional porous microsphere, the step is basically the same as the step of embodiment 1, the difference is:

[0025] In step three, disperse 2.5mL of chitin microspheres into 5.3mL of deionized water, then add 0.2mL of tannic acid aqueous solution to the solution, let stand for 1min, then add 2mL of titanium lactate aqueous solution to the solution, and let stand After 1 min, a mixed solution E was obtained. The molar concentration of tannic acid in the mixed solution E was 0.12 mmol / L, and finally functional porous microspheres were obtained. Its specific surface area is 7.62m 2 / g, pore diameter 18.33nm, porosity 0.04cm 3 / g. Figure 3-1 and Figure 3-2 SEM photo of the functional porous microspheres prepared in Example 2.

Embodiment 3

[0026] Embodiment 3, prepare a kind of functional porous microsphere, the step is basically the same as the step of embodiment 1, the difference is:

[0027] In step 3, disperse 2.5mL of chitin microspheres into 3.1mL of deionized water, then add 0.4mL of tannic acid aqueous solution to the solution, let stand for 1min, then add 4mL of titanium lactate aqueous solution to the solution, and let stand After 1 min, a mixed solution E was obtained. The molar concentration of tannic acid in the mixed solution E was 0.24 mmol / L, and finally functional porous microspheres were obtained. Its specific surface area is 9.62m 2 / g, pore diameter 18.36nm, porosity 0.08cm 3 / g. Pic 4-1 and Figure 4-2 SEM photo of the functional porous microspheres prepared in Example 3.

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Abstract

The invention discloses a method for preparing functional porous micro-spheres.Firstly, chitin powder is dissolved in sodium hydroxide / urea aqueous solution through multigelation, then chitin solution forms stable emulsion droplets in an oil phase containing a surfactant so that chitin micro-spheres can be obtained through thermally induced phase separation, and finally the functional porous micro-spheres coated with TA-Ti are obtained through simple impregnation of chitin micro-spheres in polyphenol TA solution and Ti-BALDH solution by means of the adhesion characteristic of polyphenol on the surface of a matrix and the strong coordination effect of metal ions.Raw materials for preparation are cheap and easy to obtain, the preparing process is simple and easy to implement, and preparing conditions are mild.By changing the concentration of TA during preparation, functional regulation of the functional porous micro-spheres can be achieved.

Description

technical field [0001] The invention relates to a preparation method of functional porous microspheres, which belongs to the preparation technology of porous microspheres. Background technique [0002] In recent years, functional porous microspheres have received more and more attention and have been widely used in energy storage, separation, cell and drug delivery, tissue regeneration carrier and catalyst carrier, etc. The advantages of functional porous microspheres are mainly reflected in their porosity and multifunctionality. Among them, porosity can provide high specific surface area, high loading capacity and excellent mass transfer characteristics for its multiple applications; multifunctionality can provide its multiple applications, such as heavy metal ion adsorption, metal ion reduction, immobilization of biomolecules, tissue regeneration etc., providing unique physicochemical properties. [0003] At present, a series of natural polymers, such as cellulose, chito...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02B01J20/24B01J20/30B01J20/28
CPCB01J13/02B01J20/22B01J20/24B01J20/28021B01J20/28059B01J2220/4806B01J2220/4812B01J2220/4825
Inventor 吴洪韩平平石家福姜忠义
Owner TIANJIN UNIV
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