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Method for preparing fatty acid molecular imprinted polymer

A technology of molecular imprinting and fatty acids, which is applied in the fields of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of lack of standard samples, low purity and complicated steps for oil analysts , to achieve the effect of good selective adsorption and separation ability, high purity and low cost

Active Publication Date: 2010-12-08
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional production methods have problems that are difficult to solve, such as complicated steps
[0006] At present, there is no sale of standard samples of unsaturated fatty acid methyl esters in the domestic market, expensive imports from abroad, and some of the purity is not high, and the standard samples are prone to oxidation, decomposition, polymerization and other reactions during storage to reduce the purity. Therefore, Oil analysts often find it difficult due to the lack of standard samples

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The fatty acid in this example is linoleic acid.

[0030] A method for preparing fatty acid molecularly imprinted polymers, the steps are as follows:

[0031] (1) Add the initiator azobisisobutyronitrile (AIBN) in 100mL ethanol in the Erlenmeyer flask equipped with a reflux condenser, heat it in a water bath to near boiling, and quickly filter the hot solution to obtain white crystals after cooling. Dry in a desiccator.

[0032] (2) Diaminopyridine and equimolar triethylamine are formulated into 3%-6% by weight chloroform solution (wherein diaminopyridine and equimolar triethylamine are 3%-6%), placed Stir in an inert gas flask, drop the solution of acryloyl chloride and chloroform (where the weight of acryloyl chloride and chloroform is 2-4 times) into the flask drop by drop at room temperature, stir at room temperature for 30 min, and at 60°C for 40 min, filter, and the filtrate is passed through Distilled under reduced pressure to obtain a yellow-green semi-solid, ...

Embodiment 2

[0039] The fatty acid in this example is linoleic acid.

[0040] A method for preparing fatty acid molecularly imprinted polymers, the steps are as follows:

[0041] (1) In a Erlenmeyer flask equipped with a reflux condenser, add 120 g of the initiator azobisisobutyronitrile (AIBN) into 100 mL of ethanol, heat it in a water bath to near boiling, quickly filter the hot solution, and obtain white crystals after cooling , dried in a vacuum desiccator;

[0042](2) The bulk polymerization method was used to synthesize MIPs (molecularly imprinted materials) at an optimized ratio. 0.284 g of the target molecule and 0.284 g of the functional monomer were dissolved in a solvent and stirred for 4 hours to form a stable template molecular monomer complex. ; Add initiator AIBN, crosslinking agent EDMA 2.475g, ultrasonic degassing for 5min, nitrogen for 5min, thermal polymerization in a water bath at 60°C under the protection of nitrogen for 24h to obtain a white blocky polymer; fully gri...

Embodiment 3

[0048] The fatty acid in this embodiment is stearic acid.

[0049] A method for preparing fatty acid molecularly imprinted polymers, the steps are as follows:

[0050] (1) In a Erlenmeyer flask equipped with a reflux condenser, add 120 g of the initiator azobisisobutyronitrile (AIBN) into 100 mL of ethanol, heat it in a water bath to near boiling, quickly filter the hot solution, and obtain white crystals after cooling , dried in a vacuum desiccator;

[0051] (2) Using the bulk polymerization method to synthesize MIPs (molecularly imprinted materials), 0.288g of stearic acid and 0.568g of functional monomer acrylamide were dissolved in a solvent for 4 hours of dark reaction to form a stable template molecular monomer complex, Add 10 mg of initiator AIBN and 2.475 g of cross-linking agent EDMA, ultrasonic degassing for 5 minutes, nitrogen for 5 minutes, thermal polymerization in a water bath at 60°C for 24 hours under the protection of nitrogen to obtain a white blocky polymer...

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Abstract

The invention relates to a method for preparing fatty acid molecular imprinted polymer, which comprises the following steps of: introducing a covalent bond to form a functional monomer of the molecular imprinted polymer; mixing template solution with certain concentration and the functional monomer according to a proportion, fully stirring, and refluxing to prepare precursor solution; and adding an initiator and a crosslinker, performing water bath for 24 h, grinding the product, sieving with a screen of 200 meshes, refluxing and extracting by using methanol-acetic acid solution for a long time, fully washing the obtained product by using ethanol, and drying to constant weight by using an oven at 60 DEG C to prepare the fatty acid molecular imprinted polymer. The fatty acid molecular imprinted polymer prepared by the method has the advantages of regular shape, high mechanical strength, high physiochemical performance, swelling resistance, good selective adsorption effect and the like, can be used under extreme conditions such as acid, alkali, high temperature and the like, is suitable for separating, purifying and enriching the fatty acid from complex matrixes such as water-soluble media, animal derived foods and the like, and has wide application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of separation and purification polymer template materials, and relates to a preparation method of fatty acid molecularly imprinted polymers. Background technique [0002] Polyunsaturated fatty acids refer to straight-chain fatty acids containing two or more double bonds and a carbon chain length of 18 to 22 carbon atoms, usually divided into omega-3 and omega-6. In polyunsaturated fatty acid molecules, the double bond farthest from the carboxyl group is called omega-3 on the third carbon atom from the bottom; the one on the sixth carbon atom is called omega-6. [0003] Linoleic acid is an essential fatty acid for the human body. Regular consumption can soften blood vessels, reduce the absorption of cholesterol in the gastrointestinal tract, and excrete it from the body. According to reports, the main pharmacological effect of linoleic acid is to maintain the essential factors of brain and nerve functio...

Claims

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Application Information

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IPC IPC(8): C08F222/14C08F222/38C08F220/56C08F2/44C08F2/02C08J9/26C07D207/14B01J20/26B01J20/28B01J20/30
Inventor 王昌禄谷其美李风娟王玉荣陈勉华
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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