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Preparation method for magnetic polymer composite microsphere

A composite microsphere and polymer technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of time-consuming and laborious operation, difficult solid-liquid separation of adsorbents, etc. Conversion into production, easy solid-liquid separation, small footprint effect

Inactive Publication Date: 2013-04-03
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology simplifies the manufacturing processes while also being cost-effective compared with traditional methods like solvent extraction or emulsion techniques that require high energy consumption during separation steps. It does this through an easily obtained material made from natural sources without any specific technical problem addressed in previous researchers' experiments.

Problems solved by technology

This patented technical solution describes how chitin may improve its ability to absorb different types of substances like metals while also being able to easily break down into smaller particles for easier handling during processing steps. Additionally, there exist other ways to attach specific chemical moieties onto these small particles called glucans (a kind of sugar). These attachment methods help create stable composites containing chitins/glucomannanes together with magnetizable nanopartils attached thereto through covalently linking them via weak interactions between each component's carboxylic acids and sugars.

Method used

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  • Preparation method for magnetic polymer composite microsphere
  • Preparation method for magnetic polymer composite microsphere

Examples

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Embodiment 1

[0025] At room temperature, in a 250 mL three-neck flask equipped with a magnetic stirrer and a dropping funnel, add 2.7 g of FeCl 3 ·6H 2 O and 2.8 g FeSO 4 ·7H 2 O (molar ratio 1:1) was dissolved in 50mL water, and N 2 Protect, heat the water bath to a certain temperature (about 50°C), under the condition of vigorous stirring, add 50mL of 1.5mol / L NaOH solution dropwise to the three-necked flask at a uniform speed, and adjust the pH value to greater than 9. After the dropwise addition, stir rapidly for 30 minutes, raise the temperature to 75°C, heat-preserve and mature for 30 minutes, separate the solid and liquid, use 1:1 ethanol / water solution at 25°C to sonicate for 1 hour, wash, and dry under vacuum at 100°C; the prepared Fe 3 o 4 After adding to 2% sodium alginate gel and mixing evenly, slowly drop the magnetic gel to 2% CaCl with a syringe 2 After aging in the solution (100 mL) for 24 h, the Cl on the surface of the gel balls was washed with deionized water. － , ...

Embodiment 2

[0028] At room temperature, in a 250 mL three-neck flask equipped with a magnetic stirrer and a dropping funnel, add 2.7 g of FeCl 3 ·6H 2 O and 5.6 g FeSO 4 ·7H 2 O (molar ratio 1:2) was dissolved in 50mL water, and N 2 Protect, heat the water bath to a certain temperature (about 50°C), under the condition of vigorous stirring, add 50mL of 1.5mol / L NaOH solution dropwise to the three-necked flask at a uniform speed, and adjust the pH value to greater than 9. After the dropwise addition, stir rapidly for 30 minutes, raise the temperature to 75°C, heat-preserve and mature for 30 minutes, separate the solid and liquid, use 1:1 ethanol / water solution at 25°C to sonicate for 1 hour, wash, and dry under vacuum at 100°C; the prepared Fe 3 o 4 After adding to 4% sodium alginate gel and mixing evenly, slowly drop the magnetic gel to 4% CaCl with a syringe 2 After aging in the solution (100 mL) for 24 h, the Cl on the surface of the gel balls was washed with deionized water. － , ...

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Abstract

The invention provides a preparation method for a magnetic polymer composite microsphere, which relates to a preparation method for an inorganic-organic composite material and a functional polymer composite material. The method comprises the following steps: 1) preparation of a nanometer Fe3O4 particle: a step of adding an alkaline solution into a compound solution containing Fe<3+> and Fe<2+> drop by drop under the protection of N2 and then carrying out solid-liquid separation, washing and vacuum drying; 2) preparation of a magnetic calcium alginate gel sphere: a step of uniformly mixing the nanometer Fe3O4 particle with calcium alginate gel and removing Cl<-> on the surface of the gel sphere through washing with water; and 3) preparation of the magnetic polymer composite microsphere: a step of adding the magnetic calcium alginate gel sphere into an acid solution of chitosan, immersing the gel sphere in glutaraldehyde and carrying out magnetic separation and vacuum drying so as to obtain the magnetic polymer composite microsphere. The method provided by the invention has the advantages of easy availability of raw materials, simple operation, high efficiency and the like; and the prepared microsphere has a uniform size, high thermal stability and mechanical stability and a strong adsorptive property, can be recovered and reused and is applicable to fields like wastewater treatment.

Description

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Claims

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Application Information

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Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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