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A Method for Controllable Preparation of Hollow Molecularly Imprinted Nanorods Using Halloysite as a Template

A technology of molecular imprinting and halloysite, which is applied in nanotechnology, chemical instruments and methods, and other chemical processes, can solve the problems of control, coating uniformity and thickness of difficult-to-polymerize layers, and achieve excellent regeneration performance, abundant reserves, Effect of good thermal and chemical stability

Inactive Publication Date: 2016-03-02
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used surface imprinting technology still has many technical difficulties, such as: it is difficult to achieve uniform coating of the polymer layer and control the thickness at the nanometer level, etc.

Method used

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  • A Method for Controllable Preparation of Hollow Molecularly Imprinted Nanorods Using Halloysite as a Template
  • A Method for Controllable Preparation of Hollow Molecularly Imprinted Nanorods Using Halloysite as a Template
  • A Method for Controllable Preparation of Hollow Molecularly Imprinted Nanorods Using Halloysite as a Template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Halloysite pretreatment and surface functionalization

[0029] According to the ratio of halloysite (HNTs):concentrated nitric acid:distilled water mass ratio of 1:4:25 (g / g / g), halloysite, distilled water and concentrated nitric acid were added to the flask in turn, ultrasonicated for 30min, placed in 80 o In a C oil bath, stir vigorously for 12 hours, filter with suction, wash with distilled water until neutral, and place at 100 o C oven drying to constant weight, to obtain the processed halloysite. According to the ratio of the treated halloysite: 3-(methacryloyloxy) propyltrimethoxysilane (KH570): toluene mass ratio of 1.0:1.0:100 (g / g / g), to the three-necked flask Add treated halloysite, 3-(methacryloyloxy)propyltrimethoxysilane and toluene in sequence, ultrasonically disperse evenly, place at 90 o In a C oil bath, the reaction was vigorously stirred for 12 hours. After the reaction, cooled to room temperature, the product was washed with toluene, ethanol and...

Embodiment 2

[0035] (1) Halloysite pretreatment and surface functionalization

[0036] According to the ratio of halloysite (HNTs):concentrated nitric acid:distilled water mass ratio of 1:6:25 (g / g / g), halloysite, distilled water and concentrated nitric acid were added to the flask in turn, ultrasonicated for 30min, and placed in 80 o In a C oil bath, stir vigorously for 12 hours, filter with suction, wash with distilled water until neutral, and place at 100 o C oven drying to constant weight, to obtain the processed halloysite. According to the ratio of the treated halloysite: 3-(methacryloyloxy) propyltrimethoxysilane (KH570): toluene mass ratio of 1.0:1.0:100 (g / g / g), to the three-necked flask Add treated halloysite, 3-(methacryloyloxy)propyltrimethoxysilane and toluene in sequence, ultrasonically disperse evenly, place at 90 o In a C oil bath, the reaction was vigorously stirred for 12 hours. After the reaction, cooled to room temperature, the product was washed with toluene, ethanol...

experiment example 1

[0045] Experimental Example 1: Take 10ml of chloramphenicol solutions with initial concentrations of 10, 50, 100, 150, 200, 300, 400, 500 and 600 μmol / L and add them to a centrifuge tube, add 10 mg of HMINs-1, HMINs-2, For HMINs-3 and HNINs-2, put the test solution in a 298K water bath and let it stand for 12.0h, then centrifuge to collect the supernatant, measure the molecular concentration of unadsorbed chloramphenicol with a UV-visible spectrophotometer, and calculate according to the results out the adsorption capacity. Such as Figure 7 As shown, the experimental results show that: with the increase of the concentration, the adsorption amount of chloramphenicol increases; the adsorption amount of chloramphenicol by hollow molecularly imprinted nanorods is greater than that of HNINs-2, showing good specific recognition and separation performance, indicating that there are active sites matching chloramphenicol molecules in the hollow molecularly imprinted nanorod polymer g...

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Abstract

The invention relates to a method for controllably preparing hollow molecularly imprinted nanorods with halloysite as a template, which belongs to the technical field of preparation of environmental functional polymer materials. Using the abundant, cheap and easy-to-obtain natural mineral halloysite nanotubes as a template; through silanization reaction, vinyl groups are grafted on the surface of halloysite, and the surface is in-situ precipitated and polymerized, and the surface of halloysite is coated with molecular imprinting The thickness of the polymer layer is uniform, and the size can be regulated by the amount of polymerized monomers; the halloysite is etched and removed to obtain hollow molecularly imprinted nanorods, and the utilization rate of active binding sites per unit mass is improved. The hollow molecularly imprinted nanoparticles prepared by this method have good thermal and chemical stability, and have been successfully applied to the efficient and selective recognition and separation of chloramphenicol in water environments. change, while excellent regeneration performance.

Description

Technical field [0001] The present invention involves a method of Ellowstone as a template that can control the nano -nanoscopy nanoscope, which is the field of environmental functional materials preparation. Background technique [0002] Chloramphenicol (CAP) is an antibiotic produced by Venezueous zippental bacteria. It has a strong inhibitory effect on Gram -negative bacteria and Gram -positive bacteria.Treatment and prevention.The abuse and use of drugs have also caused drug residues of poultry food, and the problems of residuals are increasingly prominent.Today, many countries including China, CAP is frequently detected in the outlets, surface water and groundwater of the sewage treatment plant.Due to the severe toxic and side effects of chloramphenicol, long -term trace intake will not only cause drug resistance, but also cause dysfunction of various strains such as E. coli, Salmonella, etc., but also causes normal fungus disorders, reduced resistance, and vulnerable to var...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30B82Y40/00
Inventor 戴江栋赵春艳孟敏佳周志平邹天边闫永胜
Owner JIANGSU UNIV
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