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Preparation method of hydrophilic magnetic halloysite surface molecularly-imprinted nano composite material

A technology of nanocomposite materials and surface molecular imprinting, which is applied to chemical instruments and methods, water pollutants, alkali metal compounds, etc., to achieve uniform size, excellent regeneration performance, and uniform distribution

Inactive Publication Date: 2014-01-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation and application of most molecularly imprinted polymers are limited to organic solvents, and the natural recognition system and the actual application environment of molecularly imprinted polymers are mostly aqueous systems. Therefore, the development of hydrophilic surface imprinted polymers Applying to aqueous phase recognition system is the research goal of molecular imprinting technology

Method used

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  • Preparation method of hydrophilic magnetic halloysite surface molecularly-imprinted nano composite material
  • Preparation method of hydrophilic magnetic halloysite surface molecularly-imprinted nano composite material
  • Preparation method of hydrophilic magnetic halloysite surface molecularly-imprinted nano composite material

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preparation example Construction

[0030] (1) Preparation of magnetic halloysite

[0031] Add 20 mL of ethanol, 1.0 g of halloysite, and 0.8 g of ferric nitrate nonahydrate to a 50-ml flask in sequence, ultrasonically disperse evenly, and stir magnetically at room temperature for 16 h. o C oven dry. After grinding, put it into a magnetic boat, add 3.0 mL of ethylene glycol (EG) dropwise, fully soak for 12 h, and heat in a tube furnace at 4.0 oC / min heat up to 400 o C, Calcined at this temperature for 2.0 h, the calcined product was washed with ethanol several times, and dried to constant weight to obtain magnetic halloysite (MHNTs). From figure 1 It can be seen that the magnetic nanoparticles are evenly distributed inside and outside the pores of halloysite, and have strong magnetic saturation (such as Figure 4 shown).

[0032] (2) Magnetic halloysite surface grafting initiator

[0033] Add 1.0 g magnetic halloysite, 2.0 mL gamma -Aminopropyltriethoxysilane and 100 mL toluene, ultrasonically disperse...

experiment example 2

[0045] Experimental example 2: Take 10 ml of sulfamethazine solution with an initial concentration of 100 μmol / L and add it to a centrifuge tube, add 5.0 mg of HMMINs and HMNINs respectively, and place the test solution at 25 o C in a water bath for 10, 20, 30, 45, 60, 90 and 120 minutes. After standing still, the supernatant was collected by magnetic separation, and the concentration of unadsorbed sulfamethazine molecules was measured with an ultraviolet-visible spectrophotometer, and the adsorption capacity was calculated according to the results. Figure 7 The results showed that HMMINs and HMNINs had good adsorption kinetics for sulfamethazine, and the adsorption equilibrium was basically reached within 45 minutes.

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Abstract

The invention relates to a preparation method of a hydrophilic magnetic halloysite surface molecularly-imprinted nano composite material and belongs to the technical field of preparation of an environment functional material. Magnetic halloysite is synthesized by an impregnation method and a high temperature reducing method, and magnetic nano particles have a uniform size and are uniformly distributed; an initiator is grafted to the surface of the magnetic halloysite by the surface amination and amidation reaction and a molecularly-imprinted polymerization layer grafted to the surface of the magnetic halloysite is controlled in the nanoscale by surface atom transfer radical polymerization; due to existence of a tail-end ATRP (atom transfer radical polymerization) active group, the hydrophilic magnetic halloysite surface molecularly-imprinted nano composite material is successfully grafted with a hydrophilic polymer brush, is successfully applied to high-efficiency selective removal and rapid magnetic separation of sulfamethazine in the water environment and has excellent regenerability.

Description

technical field [0001] The invention relates to a method for preparing a hydrophilic magnetic halloysite surface molecularly imprinted nanocomposite material, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] In recent years, antibiotics have been widely used in fields such as agriculture, animal husbandry, and disease treatment. However, a large amount of antibiotics are transferred to the natural environment with excrement. Antibiotics can have adverse effects on ecosystems and their accumulation in organisms can inhibit biological growth. Sulfa antibiotics are common synthetic antibiotics, most of which are derivatives based on p-aminobenzenesulfonamide, and have a broad antibacterial spectrum. Because it is transferred to the human body through bioaccumulation, it can damage human organs, increase human drug resistance, and produce some chronic poisoning phenomena. Common sulfa antibiotics include s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F285/00C08F292/00C08F222/14C08F226/06C08J9/26B01J20/26B01J20/28C02F1/28C02F101/34C02F101/38
Inventor 戴江栋邹永立周志平赵春艳邹天边李春香闫永胜
Owner JIANGSU UNIV
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