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Preparation of flax surface Sudan red molecularly imprinted adsorption material

An adsorption material and molecular imprinting technology, applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of reducing the utilization rate of imprinting sites, uneven distribution of imprinting sites, template leakage and mechanical properties, etc., to improve the use of Effect of low value, short elution time, excellent mechanical stability

Inactive Publication Date: 2015-01-21
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device required by this method is simple and universal, but there are usually the following problems: (1) The controllability is poor during the grinding process, and some irregular particles are inevitably generated, and some imprinted spots are destroyed at the same time
The qualified particles obtained after sieving are generally less than 50%, resulting in obvious waste; (2) there are too deep embedding of template molecules, difficulty in elution, template leakage and low mechanical properties; (3) uneven distribution of imprinted sites , some of them are located above the particle pores, and their mass transfer rate is faster, while others are embedded in the polymer body, which is affected by steric hindrance, has poor accessibility, and the rate of recombining template molecules is slow, thereby reducing the number of imprinted sites. Utilization of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Hemp pretreatment: Wash and dry the waste hemp ropes and sacks, then crush them, and sieve them through a 30-mesh sieve. Add water: 78mL, NaOH: 8g to the reactor, and crush the sieved hemp: 14g, stirred, boiled for 2.5 h, cooled, washed with deionized water until neutral, filtered by suction, dried to obtain pretreated hemp;

[0023] (2) Preparation of hemp chloride: In the reactor, add N,N-dimethylformamide: 14mL, thionyl chloride: 45mL, pretreated hemp: 13g, keep the temperature at 75±3℃, stir, Refluxing reaction for 16 h, after the reaction was completed, reflux washing with acetone to remove the dimethylformamide and thionyl chloride adhering to the surface, after taking it out, put it in a vacuum drying oven to dry to obtain hemp chloride;

[0024] (3) Preparation of Sudan red molecularly imprinted adsorption material on hemp surface: In the reactor, add N,N-dimethylformamide: 40mL, Sudan red: 1.0g, aconitic acid: 7.5g, ethylene glycol di Methacrylate: 36mL, a...

Embodiment 2

[0027] (1) Hemp pretreatment: Wash and dry the waste hemp ropes and sacks, then crush them, and sieve them through a 20-mesh sieve. Add water: 76mL, NaOH: 4g to the reactor, and crush the sieved hemp: 20g, stirred, boiled for 3 h, cooled, washed with deionized water until neutral, filtered by suction, dried to obtain pretreated hemp;

[0028](2) Preparation of hemp chloride: In the reactor, add N,N-dimethylformamide: 21mL, thionyl chloride: 43mL, pretreated hemp: 10g, keep the temperature at 75±3℃, stir, Reflux reaction for 12 h, after the reaction is completed, wash with acetone under reflux to remove the dimethylformamide and thionyl chloride adhering to the surface, take it out and put it in a vacuum drying oven to dry to obtain hemp chloride;

[0029] (3) Preparation of Sudan red molecularly imprinted adsorption material on hemp surface: In the reactor, add N,N-dimethylformamide: 43mL, Sudan red: 1.5g, aconitic acid: 6g, ethylene glycol dimethyl Acrylic acid ester: 30mL, ...

Embodiment 3

[0032] (1) Hemp pretreatment: Wash and dry the waste hemp ropes and sacks, then crush them, and sieve them through a 40-mesh sieve. Add water: 84mL, NaOH: 6g to the reactor, and crush the sieved hemp: 10g, stirred, boiled for 2 h, cooled, washed with deionized water until neutral, filtered by suction, dried to obtain pretreated hemp;

[0033] (2) Preparation of hemp chloride: In the reactor, add N,N-dimethylformamide: 18mL, thionyl chloride: 40mL, pretreated hemp: 18g, keep the temperature at 75±3℃, stir, Reflux reaction for 18 h, after the reaction is completed, wash with acetone under reflux to remove the dimethylformamide and thionyl chloride adhering to the surface, take it out and put it in a vacuum drying oven to dry to obtain hemp chloride;

[0034] (3) Preparation of Sudan red molecularly imprinted adsorption material on hemp surface: In the reactor, add N,N-dimethylformamide: 42mL, Sudan red: 0.5g, aconitic acid: 10g, ethylene glycol dimethyl Acrylic acid ester: 27mL...

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Abstract

The invention discloses a preparation method of a flax surface Sudan red molecularly imprinted adsorption material, and is characterized in that with aconitic acid and ethylene glycol dimethacrylate as functional monomers, Sudan red as a template molecule, flax as a supporting body, and azodiisobutyronitrile as an initiator, the flax surface Sudan red molecularly imprinted adsorption material is prepared by a bulk polymerization method. The flax surface Sudan red molecularly imprinted adsorption material can separate Sudan red and a structural likeness under conditions of normal temperature and normal pressure; and the flax surface Sudan red molecularly imprinted adsorption material prepared by the method has particular holes, has a specific recognition ability on Sudan red molecules, has the advantages of relatively high selectivity, good mechanical performance, no adsorption of other coexisting substances, quite good chemical stability, fast adsorption speed, easy elution, biodegradability, simple process, environmental friendliness and the like, and has a regeneration capacity.

Description

technical field [0001] The present invention relates to a preparation method and application technology of molecularly imprinted adsorption materials, in particular to a preparation method and separation application technology of sudan red molecularly imprinted adsorption materials on the surface of hemp, belonging to adsorption separation materials and sample pretreatment methods and technology field. Background technique [0002] Sudan red dye is often used as an industrial raw material and is widely used in the color enhancement of solvents, oils, waxes, gasoline, shoes, and floors. In 1896, the scientist Duddy named it Sudan Red and it is still in use today. Sudan red mainly includes four types of azo oil-soluble industrial pigments Ⅰ, Ⅱ, Ⅲ and Ⅳ. Among them, Sudan Ⅱ, Ⅲ and Ⅳ are all derivatives of Sudan Ⅰ, which are listed by the International Agency for Research on Cancer (IARC) as One of the three carcinogens. All countries in the world have banned the use of Sudan...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30
CPCB01J20/264B01J20/268B01J2220/445B01J2220/4887
Inventor 李冬梅李慧芝许崇娟
Owner UNIV OF JINAN
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