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Preparation method of molecularly imprinted nanocomposites on the surface of hydrophilic magnetic halloysite

A nanocomposite material, surface imprinting technology, applied in chemical instruments and methods, water pollutants, alkali metal compounds, etc., to achieve excellent regeneration performance, uniform distribution, and uniform size.

Inactive Publication Date: 2016-05-25
JIANGSU UNIV
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  • Summary
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  • 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 molecularly imprinted nanocomposites on the surface of hydrophilic magnetic halloysite
  • Preparation method of molecularly imprinted nanocomposites on the surface of hydrophilic magnetic halloysite
  • Preparation method of molecularly imprinted nanocomposites on the surface of hydrophilic magnetic halloysite

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Experimental program
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preparation example Construction

[0029] (1) Preparation of Magnetic Halloysite

[0030] Add 20mL of ethanol, 1.0g of halloysite and 0.8 g of ferric nitrate nonahydrate to a 50ml flask in sequence, ultrasonically disperse evenly, stir magnetically at room temperature for 16h, and at 90 o C oven dry. After grinding, put it into a magnetic boat, add 3.0mL ethylene glycol (EG) dropwise, fully soak for 12h, and heat it in a tube furnace at 4.0 oC / min heat up to 400 o C, maintain the temperature and calcined for 2.0h, the calcined product was washed with ethanol several times, and then 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).

[0031] (2) Magnetic halloysite surface grafting initiator

[0032] Add 1.0g magnetic halloysite, 2.0mL gamma -Aminopropyltriethoxysilane and 100mL toluene, ultrasonically ...

experiment example 2

[0042] Experimental example 2: Take 10ml of sulfamethazine solution with an initial concentration of 100μmol / L and add it to a centrifuge tube, add 5.0mg of HMMINs and HMNINs respectively, and put 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 molecularly imprinted nanocomposite material on the surface of hydrophilic magnetic halloysite, belonging to the technical field of preparation of environmental functional materials. Magnetic halloysite was synthesized by impregnation method and high-temperature reduction method, and the magnetic nanoparticles were uniform in size and evenly distributed; through surface amination and amidation reactions, the initiator was grafted on the surface of magnetic halloysite, and the surface atom transfer radical polymerization was carried out , the molecularly imprinted polymer layer grafted on the surface of magnetic halloysite was controlled at the nanoscale; due to the existence of terminal ATRP active groups, hydrophilic polymer brushes were successfully grafted, and successfully applied to the efficient selection of sulfamethazine in water environments permanent removal and fast magnetic separation, and has excellent regeneration performance.

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 Patents(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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