A kind of molecularly imprinted polymer and its preparation and application

A technology of molecular imprinting and polymers, applied in ion exchange, other chemical processes, ion exchange regeneration, etc., can solve problems such as complex matrix, achieve ultra-high specific selectivity, and improve the effect of anti-interference ability

Active Publication Date: 2020-04-28
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the matrix in which bisphenols are distributed is usually more complex, so it is also necessary to improve the anti-interference performance of the material

Method used

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  • A kind of molecularly imprinted polymer and its preparation and application

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Embodiment 1

[0023] 1) Dissolve 1mmol of substituted template molecule 1,1,1-tri-p-hydroxybenzene into 4mmol functional monomer 4-vinylpyridine (4-VP), 4mmol steric hindrance energy monomer 3,5,5-trimethyl Base-1-hexene (TMH), 20mmol crosslinking agent ethylene glycol dimethacrylate and 0.04g initiator azobisisobutyronitrile in acetonitrile (5.6mL) were prepared into a prepolymerization solution, and the prepolymerization The solution was placed in an ice bath and ultrasonically mixed for 10-15 minutes, then passed nitrogen gas for 10 minutes to remove oxygen in the system, sealed and refrigerated at 4°C for 2h, and then placed at 60°C for 24h. The white massive polymer produced by the reaction is pulverized, ground, sieved and settled with acetone to obtain a polymer with a particle size of 38-63 μm. The obtained polymer was subjected to Soxhlet extraction with methanol acetic acid (9:1, v / v) as the extraction solvent to remove template molecules and other interfering substances, and the ...

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Abstract

The present invention provides a method for preparing a high-selectivity bisphenol-based substituted template molecular imprinting polymer by adding a sterically-hindered monomer, and uses of the polymer. The preparation method comprises: dissolving a substituted template molecule, a cross-linking agent, a functional monomer, a sterically-hindered monomer and an initiator in a pore forming agent to form a uniform pre-polymerization solution, placing the solution for a certain time at a low temperature, carrying out a polymerization reaction for 20-48 h at a temperature of 50-70 DEG C, grindingthe white block-like polymer produced by the polymerization reaction, screening, settling to obtain polymer particles with a particle size of 38-63 [mu]m, carrying out Soxhlet extraction on the obtained particles by using a methanol / acetic acid mixing solution or methanol as an extractant, and removing the substituted template and the unreacted material from the polymer so as to obtain the molecular imprinting polymer. According to the present invention, by adding the sterically-hindered monomer, the specific selectivity and the enrichment ability of the polymer to the bisphenol-based compound are enhanced while the anti-interference ability of the material to the interferent is improved.

Description

technical field [0001] The invention relates to a molecularly imprinted polymer that utilizes a steric hindrance monomer to improve the performance of enrichment and purification of bisphenol compounds (enhances site restriction performance by using a steric hindrance monomer) and its preparation and application, belonging to the field of environmental monitoring and new materials . Background technique [0002] Bisphenol compounds have stable chemical properties, high temperature resistance, heat resistance, good ductility, simple production process and low cost, and are widely used raw materials and additives in polymer materials. However, because the structure of this type of compound is similar to estradiol, it has potential endocrine disrupting effects and toxic effects on the human body. It is a class of environmental pollutants that are extremely harmful. Among them, BPA is an endocrine disruptor with estrogen activity, and trace or even trace concentrations may cau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F222/14C08F226/06C08F210/14B01J20/26B01J20/30B01D15/08
CPCB01D15/08B01J20/268C08F222/10C08F222/102C08F226/06C08F210/14
Inventor 陈吉平彭俊钰孙晓丽王金成黄超囡孙昊
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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