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Method for controllably preparing hollow molecularly-imprinted nanorod by using halloysite as template

A molecular imprinting and halloysite technology, applied in nanotechnology, chemical instruments and methods, and other chemical processes, can solve problems such as control, uniformity and thickness of difficult-to-polymerize layer coating, and achieve excellent regeneration performance, abundant reserves, The effect of good thermal and chemical stability

Inactive Publication Date: 2014-05-28
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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  • Method for controllably preparing hollow molecularly-imprinted nanorod by using halloysite as template
  • Method for controllably preparing hollow molecularly-imprinted nanorod by using halloysite as template
  • Method for controllably preparing hollow molecularly-imprinted nanorod by using halloysite as template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Halloysite pretreatment and surface functionalization

[0030] 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 30 min, and placed in 80 o In a C oil bath, stir vigorously for 12 h, 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 treated halloysite: 3-(methacryloyloxy) propyltrimethoxysilane (KH570): toluene mass ratio is 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 h. After the reaction, cooled to room temperature, the product was washed with toluene, ethanol and disti...

Embodiment 2

[0036] (1) Halloysite pretreatment and surface functionalization

[0037] 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 sequence, ultrasonicated for 30 min, and placed in 80 o In a C oil bath, stir vigorously for 12 h, 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 treated halloysite: 3-(methacryloyloxy) propyltrimethoxysilane (KH570): toluene mass ratio is 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 h. After the reaction, cooled to room temperature, the product was washed with toluene, ethanol an...

experiment example 1

[0046] Experimental Example 1: Take 10 ml 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, For HMINs-2, HMINs-3 and HNINs-2, the test solution was placed in a 298 K water bath for 12.0 h, and the supernatant was collected by centrifugation, and the molecular concentration of unadsorbed chloramphenicol was measured with a UV-visible spectrophotometer , and calculate the adsorption capacity according to the result. 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 po...

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Abstract

The invention relates to a method for controllably preparing a hollow molecularly-imprinted nanorod by using halloysite as a template and belongs to the technical field of preparation of environmental functional polymer materials. The method comprises the following steps: using the natural mineral, halloysite nano-tube, which is abundant in reserve volume, low in price and easy to obtain, as a template; grafting vinyl to the surface of the halloysite through a silylation reaction; carrying out surface in-situ precipitation polymerization, wherein molecularly-imprinted polymerization layers which cover the surface of the halloysite are uniform in thickness, and the size can be adjusted according to the quantity of polymerization monomers; etching off the halloysite to obtain the hollow molecularly-imprinted nanorod. The using rate of active binding sites in unit mass is increased. The hollow molecularly-imprinted nanorod prepared by the method is high in thermal stability and chemical stability, is successfully applied to efficient selective recognition and separation of chloramphenicol in a water environment, and is excellent in regeneration performance; the adsorption quantity changes along with the thickness change of the nano-imprinted layers.

Description

technical field [0001] 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 materials. Background technique [0002] Chloramphenicol (Chloramphenicol, CAP) is an antibiotic produced by Streptomyces Venezuela, which has a strong inhibitory effect on Gram-negative bacteria and Gram-positive bacteria, and is widely used in poultry, livestock and aquaculture diseases. treatment and prevention. Drug abuse and illegal use have also caused drug residues in poultry food, and the problem of residues has become increasingly prominent. Today, CAP is frequently detected in the effluent of sewage treatment plants, surface water, and groundwater in many countries, including China. Because chloramphenicol has serious toxic and side effects, long-term trace intake will not only cause drug resistance of various strains such as Escheri...

Claims

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Application Information

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Patent Type & Authority Applications(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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