Preparation method of molecularly imprinted material on attapulgite surface modified by silane coupling agent for bisphenol A

A technology of surface molecular imprinting and silane coupling agent, applied in the field of preparation of silane coupling agent modified attapulgite surface molecularly imprinted material, can solve the problem of uneven imprinted binding sites, poor controllability and poor accessibility of the grinding process and other problems, to achieve the effect of reducing the "encapsulation" phenomenon, improving accessibility, and strong targeted adsorption.

Active Publication Date: 2015-09-16
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Technical problem to be solved: the present invention provides a method for preparing a molecularly imprinted material on the surface of attapulgite modified by a silane coupling agent for bisphenol A. The prepared molecularly imprinted material on the surface of attapulgite has a large adsorption capacity and a It has the advantages of strong adsorption, high reuse rate, and long service life, which can solve the problem of poor controllability of the grinding process of molecularly imprinted materials obtained by traditional bulk polymerization, difficulty in deep entrapment and elution of internal template molecules, uneven imprinted binding sites, Poor accessibility, slow recognition kinetics, etc.

Method used

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  • Preparation method of molecularly imprinted material on attapulgite surface modified by silane coupling agent for bisphenol A
  • Preparation method of molecularly imprinted material on attapulgite surface modified by silane coupling agent for bisphenol A
  • Preparation method of molecularly imprinted material on attapulgite surface modified by silane coupling agent for bisphenol A

Examples

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Embodiment 1

[0025] A method for preparing a molecularly imprinted material on the surface of attapulgite modified with a silane coupling agent for bisphenol A, specifically comprising the following steps: (1) Purification of attapulgite raw soil, accurately weighing 2.400g of sodium hexametaphosphate in 800mL After fully dissolving in distilled water, add 40.000g of attapulgite raw soil, place in a constant temperature water bath at 50°C, stir for 2 hours, and ultrasonically disperse for 0.5 hours. After standing for 24 hours, centrifuge, dry, grind and sieve to obtain purified attapulgite; (2) Weigh 10g of purified attapulgite in 100mL of 6mol / L HCl solution at 80°C for 1 hour under constant temperature magnetic stirring and reflux, vacuum filter, wash with ultrapure water until the lotion is neutral, and dry under vacuum at 105°C for 2 hours to obtain acidified Attapulgite; (3) Add 10g of acidified attapulgite and 200mL of distilled water into a 500mL beaker in sequence, and apply ultras...

Embodiment 2

[0036] A method for preparing a molecularly imprinted material on the surface of attapulgite modified with a silane coupling agent for bisphenol A, specifically comprising the following steps: (1) purification of attapulgite raw soil; (2) weighing 10 g of purified attapulgite in 100mL of 6mol / L HCl solution was refluxed at 80°C for 1 hour under constant temperature magnetic stirring, vacuum filtered, washed with ultrapure water until the lotion was neutral, and dried in vacuum at 105°C for 2 hours to obtain acidified attapulgite; (3) in a 500mL beaker Add 10g of acidified attapulgite and 200mL of distilled water in sequence, and apply ultrasound for 15 minutes; adjust the pH=4 to 6, and add 2g of γ-glycidoxypropyltrimethoxysilane coupling agent; and react with magnetic force in a water bath at 80°C for 5 hours. After suction filtration, washing with distilled water and ethanol, and centrifugation, vacuum-dry at 50-60°C to obtain epoxy silane coupling agent modified attapulgite;...

Embodiment 3

[0038] A method for preparing a molecularly imprinted material on the surface of attapulgite modified with a silane coupling agent for bisphenol A, specifically comprising the following steps: (1) purification of attapulgite raw soil; (2) weighing 10 g of purified attapulgite in 100mL of 6mol / L HCl solution was refluxed at 80°C for 1 hour under constant temperature magnetic stirring, vacuum filtered, washed with ultrapure water until the lotion was neutral, and dried in vacuum at 105°C for 2 hours to obtain acidified attapulgite; (3) in a 500mL beaker Add 10g of acidified attapulgite and 200mL of distilled water in sequence, and apply ultrasound for 15 minutes; adjust the pH=4 to 6, and add 2g of glycidoxypropylmethyldiethoxysilane coupling agent; stir magnetically in a water bath at 80°C After reacting for 5 hours, after suction filtration, washing with distilled water and ethanol, and centrifugation, vacuum-dry at 50-60°C to obtain epoxy silane coupling agent modified attapul...

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Abstract

The invention discloses a method for preparing a silane coupling agent modified attapulgite surface molecular imprinting material aiming at bisphenol A. The method comprises the following preparation steps: preparing a molecular imprinting material carrier; adding silane coupling agent modified attapulgite into an HCl solution to be acidified, performing backflow reaction under the condition of heating and nitrogen-filled seal, and drying in vacuum; adding the attapulgite obtained in the second step into anhydrous methylbenzene, adding acryloyl chloride and triethylamine under the condition of nitrogen-filled seal, stirring to react under the condition of room temperature, performing suction filtration, subsequently washing, and drying in vacuum; and putting the attapulgite obtained in the third step into an acetonitrile solvent, further adding template molecules, functional monomers, cross-linking agents and initiators to perform polymerization reaction so as to form the expected attapulgite surface molecular imprinting material. The prepared attapulgite surface bisphenol A molecular imprinting material has the advantages of large adsorption capacity, high targeted adsorbability, high repeated utilization rate, long service life and the like.

Description

technical field [0001] The invention relates to a method for synthesizing a surface molecularly imprinted material using natural clay minerals as a carrier, in particular to a method for preparing a silane coupling agent-modified attapulgite surface molecularly imprinted material for bisphenol A. Background technique [0002] Bisphenol A (BPA) is an important organic chemical raw material for the synthesis of polycarbonate and epoxy resin products. The direct and disorderly discharge of bisphenol A during industrial production and product manufacturing and use makes it widely distributed in media such as air, water, atmosphere, soil, and sediment. The chemical structure of bisphenol A is similar to estrogen, and has a certain estrogen effect. It has obvious interference effect on the reproductive system and function of male animals, and is closely related to the occurrence of reproductive disorders, abnormal development and breast cancer. Since the concentration of bispheno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F222/14C08F226/06C08F220/14C08J9/28B01J20/26B01J20/30
Inventor 赵子龙张彬声傅大放
Owner SOUTHEAST UNIV
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