Preparation method of magnetic cationic starch microsphere

A technology of cationic starch and microspheres, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of unstable adsorption effect and complicated operation, and achieve easy magnetic separation and simple operation , the effect of uniform particle size distribution

Inactive Publication Date: 2017-04-26
SHAANXI YIPINDA PETROCHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the operation is complicated and the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of magnetic cationic starch microspheres comprises the following steps:

[0018] (1) Synthesis of cationic starch: Weigh 30g of starch, add 9g of 2,3-epoxypropyltrimethylammonium chloride, stir and mix, then add 0.3g, 5% sodium hydroxide solution, stir evenly, control The reaction temperature was 70°C, reacted for 4 hours, then washed three times with absolute ethanol, and placed in an oven for vacuum drying to obtain cationic starch;

[0019] (2) Preparation of ferric salt solution: Weigh 5 g of ferric chloride and ferric dichloride at a ratio of 2:1, dissolve them in a beaker, add 250 mL of water, and obtain iron salt solution;

[0020] (3) Synthesis of magnetic cationic starch microspheres: Weigh 15 g of cationic starch sample, add 200 mL of water, and stir well to obtain a cationic starch solution; add the iron salt solution obtained in step (2) into the cationic starch solution, and control the reaction temperature to 70°C , add 0.5 mol / L s...

Embodiment 2

[0022] The preparation method of magnetic cationic starch microspheres comprises the following steps:

[0023] (1) Synthesis of cationic starch: Weigh 30g of starch, add 9g of 2,3-epoxypropyltrimethylammonium chloride, stir and mix, then add 0.3g, 5% sodium hydroxide solution, stir evenly, control The reaction temperature was 70°C, reacted for 4 hours, then washed three times with absolute ethanol, and placed in an oven for vacuum drying to obtain cationic starch;

[0024] (2) Preparation of ferric salt solution: Weigh 5 g of ferric chloride and ferric dichloride at a ratio of 2:1, dissolve them in a beaker, add 250 mL of water, and obtain iron salt solution;

[0025] (3) Synthesis of magnetic cationic starch microspheres: Weigh 15 g of cationic starch sample, add 200 mL of water, and stir well to obtain a cationic starch solution; add the iron salt solution obtained in step (2) into the cationic starch solution, and control the reaction temperature to 70°C , add 0.5 mol / L s...

Embodiment 3

[0027] The preparation method of magnetic cationic starch microspheres comprises the following steps:

[0028] (1) Synthesis of cationic starch: Weigh 30g of starch, add 9g of 2,3-epoxypropyltrimethylammonium chloride, stir and mix, then add 0.3g, 5% sodium hydroxide solution, stir evenly, control The reaction temperature was 70°C, reacted for 4 hours, then washed three times with absolute ethanol, placed in an oven for vacuum drying, and the condition of vacuum drying was vacuum drying at 60°C for 6 hours to obtain cationic starch;

[0029] (2) Preparation of ferric salt solution: Weigh 5 g of ferric chloride and ferric dichloride at a ratio of 2:1, dissolve them in a beaker, add 250 mL of water, and obtain iron salt solution;

[0030] (3) Synthesis of magnetic cationic starch microspheres: Weigh 15 g of cationic starch sample, add 200 mL of water, and stir well to obtain a cationic starch solution; add the iron salt solution obtained in step (2) into the cationic starch sol...

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Abstract

The invention provides a preparation method of magnetic cationic starch microspheres, which comprises the following steps: (1) synthesis of cationic starch: weighting starch, adding 2,3-epoxypropyltrimethyl ammonium chloride, stirring, mixing, then adding a sodium hydroxide solvent, stirring, reacting at the temperature of 70 DEG C, washing with absolute ethyl alcohol, performing vacuum drying in a dryer to obtain the cationic starch; (2) preparation of an iron salt solvent: adding ferric trichloride and ferrous chloride into water to obtain the iron salt solvent; (3) synthesis of the magnetic cationic starch microspheres: weighting a cationic starch sample, adding water, stirring uniformly to obtain a cationic starch solvent; adding the iron salt solvent obtained in the step (2) into the cationic starch solvent to react, filtering, washing with the absolute ethyl alcohol, drying, grinding, sieving to obtain the magnetic cationic starch microspheres. The invention is simple in operation, the distribution of the grain sizes of the prepared magnetic cationic starch microspheres is uniform; the magnetic cationic starch microspheres have the advantage of good adsorptive performance and the magnetic separation is easy to realize.

Description

technical field [0001] The invention belongs to the field of starch preparation, and in particular relates to a preparation method of magnetic cationic starch microspheres. Background technique [0002] Magnetic polymer microspheres refer to microspheres with certain magnetic properties and special structures formed by combining organic polymers and magnetic particles by appropriate methods. They are a new type of functional polymer materials. When the particle size of the magnetic polymer microsphere is less than 30nm, it has superparamagnetism, can be separated quickly under the action of a magnetic field, and is easy to be controlled, positioned and measured by the magnetic force. Magnetic polymer microspheres also have the characteristics of polymer particles, and their surface can be chemically modified to endow them with special functional groups (such as -CHO, -COOH, -OH, etc.). It is precisely because of these two characteristics that the research on magnetic polyme...

Claims

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Application Information

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IPC IPC(8): C08J3/12C08L3/04C08K3/16C08B31/00B01J20/24B01J20/28
CPCC08J3/12B01J20/24B01J20/28004B01J20/28009B01J20/28019C08B31/00C08J2303/04C08K3/16C08K2201/011
Inventor 李长英
Owner SHAANXI YIPINDA PETROCHEM CO LTD
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