Preparation method of core-shell structure magnetic nano-molecular imprinting polymer for separating starch polysaccharides

A magnetic nanoparticle, core-shell structure technology, applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problem of long adsorption time, low maximum saturated adsorption capacity, and low recycling rate and other problems, to achieve the effect of short adsorption time, high adsorption efficiency and high reuse rate

Active Publication Date: 2013-05-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Molecularly imprinted polymers are materials with specific recognition capabilities for target molecules (template molecules). Functional monomers, template molecules and cross-linking agents undergo polymerization reactions under certain conditions to form copolymers. The copolymers are separated and washed. If it is detached, a cavity that specifically recognizes the template molecule will be formed in the copolymer. This cavity can specifically recognize the target molecule (template molecule) in the mixed solution, and the specificity is good. The current research on molecularly imprinted polymers It mainly focuses on pesticide compounds, veterinary drug compounds, natural organic small molecular compounds and some macromolecular protein compounds. At present, there are no reports on molecularly imprin

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  • Preparation method of core-shell structure magnetic nano-molecular imprinting polymer for separating starch polysaccharides
  • Preparation method of core-shell structure magnetic nano-molecular imprinting polymer for separating starch polysaccharides
  • Preparation method of core-shell structure magnetic nano-molecular imprinting polymer for separating starch polysaccharides

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specific Embodiment approach 1

[0019] Specific embodiment one: The preparation method of the core-shell structure magnetic nano-molecularly imprinted polymer of the separation starch polysaccharide of the present embodiment is carried out according to the following steps:

[0020] 1. Preparation of Fe 3 o 4 Magnetic nanoparticles: by FeCl 2 4H 2 O and FeCl 3 ·6H 2 The mass ratio of O is 1: (1.75 ~ 2), according to the Fe in the solution 3+ Concentration of 0.05 ~ 0.07g / mL, FeCl 2 4H 2 O and FeCl 3 ·6H 2O was respectively dissolved in deionized water deoxidized by nitrogen gas, ultrasonicated for 15-25 minutes, then mechanically stirred at a stirring speed of 700-900 rpm under the protection of nitrogen until the substances in the solution were completely dissolved, and then heated to 80-90°C and then added ammonia water Adjust the pH value to 9-10, continue to react for 20-40 minutes, and use NdFeB magnets for magnetic separation and sedimentation after cooling. After pouring out the upper liquid, ...

specific Embodiment approach 2

[0025] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step one, according to the Fe in the solution 3+ The concentration is 0.06g / mL, the FeCl 2 4H 2 O and FeCl 3 ·6H 2 O is respectively dissolved in deionized water deoxygenated with nitrogen, and other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0026] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the stirring speed in step 1 is 800 rpm, stir until the substance in the solution is completely dissolved, and then heat to 85°C. Other steps and parameters are the same as in specific embodiment 1 or 2. Two same.

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Abstract

The invention discloses a preparation method of a core-shell structure magnetic nano-molecular imprinting polymer for separating starch polysaccharides, relates to the preparation method of the magnetic molecular imprinting polymer for separating the starch polysaccharides and aims at solving the problem that the molecular imprinting polymer capable of separating the starch polysaccharides is absent at present. The preparation method is as follows: 1) preparing Fe3O4 magnetic nanoparticles; 2) silylanizing the Fe3O4 magnetic nanoparticles; 3) performing amino-modification on the silylanized Fe3O4 magnetic nanoparticles; 4) performing aldehyde modification on the amino-derived Fe3O4 magnetic nanoparticles; and 5) preparing the magnetic nano-molecular imprinting polymer. The maximum saturated adsorption amount of the magnetic nano-molecular imprinting polymer disclosed by the invention to the starch polysaccharides is 8-9mg/g, which is about 2 times of that of the existing molecular imprinting polymer for separating monosaccharides, the adsorption efficiency is high, when the magnetic nano-molecular imprinting polymer is stored in a nitrogen atmosphere, the adsorption efficiency is still 90% of the original level after 30 days, the repeated utilization rate is high, and the magnetic nano-molecular imprinting polymer can be applied to the field of separating the starch polysaccharides.

Description

technical field [0001] The invention relates to a preparation method of a magnetic molecular imprinted polymer for separating starch polysaccharides. Background technique [0002] Starch is a high polymer of glucose, which is hydrolyzed to disaccharide stage to maltose, and glucose is obtained after complete hydrolysis. There are two types of starches, amylose and amylopectin. Amylose contains several hundred glucose units, and amylopectin contains several thousand glucose units. Starch is a nutrient stored in plants. It exists in seeds and tubers. It can be processed into edible cereal starch, potato starch and bean starch. Starch is one of the most representative polysaccharides. Research can separate starch Molecularly imprinted polymers have opened up new methods for the separation and purification of polysaccharides. [0003] Magnetic nanomolecularly imprinted polymers (Magnetic Molecularly Imprinted Polymers, MMIPs) make traditional molecularly imprinted polymers (M...

Claims

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Application Information

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IPC IPC(8): C08B31/00C08K9/06C08K9/04C08K3/22C08J9/26B01J20/24B01J20/28B01J20/30
Inventor 杨鑫黄微薇邹攀赵海田王静
Owner HARBIN INST OF TECH
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