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

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...

AI Technical Summary

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 imprinted polymers for separating polysaccharides. Although there are molecularly imprinted polymers for separating monosaccharides, they can also be used Separation of polysaccharides, but the maximum saturated adsorption capacity of molecularly imprinted polymers for separation of monosaccharides on monosaccharides is already low, generally around 3mg / g, the adsorption time is 12h, the adsorption time is longer, and the recycling rate is low, generally 5 ~7 times, therefore, using molecularly imprinted polymers for separating monosaccharides to separate polysaccharides will have lower adsorption capacity and reuse rate, and longer adsorption time. A magnetic nanomolecularly imprinted polymer for separating starch polysaccharides is necessary for fast, accurate and efficient separation of starch polysaccharides

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