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Preparation method for magnetic chitosan dapsone surface imprinting adsorbing material

A technology of chitosan dapsone and surface imprinting, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of deep embedding of active sites, adsorption and elution kinetics Poor chemical performance, slow kinetic rate and other problems, to achieve the effect of improving adsorption speed and adsorption capacity, improving stability and increasing adsorption capacity

Inactive Publication Date: 2014-05-28
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Surface molecular imprinting technology, by establishing molecular recognition sites on the surface of the matrix material, can better solve some serious defects in the traditional molecular imprinting technology as a whole, such as too deep embedding of active sites, and the dynamics of mass transfer and charge transfer. Slow learning rate, poor adsorption and elution kinetics, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] Example 1: Preparation of magnetic chitosan dapsone surface imprinted material

[0017] A. Preparation of Magnetic Chitosan

[0018] 0.5 g of modified chitosan was dissolved in 20 mL of 1% acetic acid solution, 0.25 g of magnetic particles and 5 mL of epichlorohydrin were added successively, after ultrasonic mixing, reflux at 80 °C for 3 h, magnetic separation, and successively After washing with ether, absolute ethanol and distilled water, the product was vacuum-dried at 50 °C to obtain magnetic chitosan.

[0019] B. Preparation of magnetic chitosan dapsone surface imprinted material

[0020] Dissolve 0.25 g of magnetic chitosan in 30 mL of 9 % ethanol, add 0.05 g of dapsone, and ultrasonically disperse evenly, then add 6 mL of epichlorohydrin, mechanically stir for 8 h, ultrasonically for 20 min, magnetically separate, and then distilled water , 0.1 mol / L dilute nitric acid, 0.1 mol / L NaOH and distilled water, dried under vacuum at 50 ℃, and then eluted the template...

example 2

[0021] Example 2: Preparation of magnetic chitosan dapsone surface imprinted material

[0022] A. Preparation of Magnetic Chitosan

[0023] 0.5 g of modified chitosan was dissolved in 20 mL of 2% acetic acid solution, 0.2 g of magnetic particles and 10 mL of epichlorohydrin were added in sequence, after ultrasonic mixing, reflux at 85 °C for 3 h, magnetic separation, and sequentially After washing with ether, absolute ethanol and distilled water, the product was vacuum-dried at 50 °C to obtain magnetic chitosan.

[0024] B. Preparation of magnetic chitosan dapsone surface imprinted material

[0025] Dissolve 0.55 g of magnetic chitosan in 30 mL of 10 % ethanol, add 0.05 g of dapsone, and ultrasonically disperse evenly, then add 4 mL of epichlorohydrin, stir mechanically for 6 h, ultrasonically for 20 min, magnetically separate, and successively wash with distilled water , 0.1 mol / L dilute nitric acid, 0.1 mol / L NaOH and distilled water, dried under vacuum at 50 ℃, and then e...

example 3

[0026] Example 3: Preparation of magnetic chitosan dapsone surface imprinted material

[0027] A. Preparation of Magnetic Chitosan

[0028] 0.5 g of modified chitosan was dissolved in 20 mL of 2% acetic acid solution, 0.3 g of magnetic particles and 8 mL of epichlorohydrin were added in sequence, and after ultrasonic mixing, reflux at 90 °C for 3 h, magnetic separation, and successively After washing with ether, absolute ethanol and distilled water, the product was vacuum-dried at 50 °C to obtain magnetic chitosan.

[0029] B. Preparation of magnetic chitosan dapsone surface imprinted material

[0030] Dissolve 0.9 g of magnetic chitosan in 30 mL of 11% ethanol solution, add 0.05 g of dapsone, and after ultrasonic dispersion is uniform, add 1 mL of epichlorohydrin, mechanically stir for 2 h, ultrasonic for 20 min, and magnetic separation, followed by Wash with distilled water, 0.1 mol / L dilute nitric acid, 0.1 mol / L NaOH and distilled water, dry under vacuum at 50 °C, and th...

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Abstract

The invention discloses a preparation method for a magnetic chitosan dapsone surface imprinting adsorbing material, particularly relates to a surface imprinting technology which builds molecule recognition sites on the surface of a substrate material. The preparation method comprises the following steps: modified chitosan and Fe3O4 particles are combined to prepare magnetic chitosan, the magnetic chitosan is further adopted, the dapsone is used as template molecules, epoxy chloropropane is used as a cross-linking agent, and then the water-insoluble acid-insoluble magnetic chitosan dapsone surface imprinting adsorbing material is prepared. The adsorbing material prepared through the preparation method disclosed by the invention has the advantages that the selectivity is high, the adsorption capacity is large, the separation operation is easy, and the reusability is good; according to the invention, the powerful material support for a novel chemical sensor, which is high in selectivity and used for measuring dapsone is provided, a novel way for separating and recycling the dapsone from waste water is developed, and effective methods for monitoring and processing environmental pollutants are provided.

Description

technical field [0001] The invention relates to a preparation method of a magnetic chitosan surface imprinted adsorption material, which belongs to the field of molecular imprinted technology. Background technique [0002] Chitosan is a natural polymer compound with excellent biocompatibility and biodegradability. It is considered to be the most potential environment-friendly adsorption material in the field of water treatment. Its surface contains a large amount of -OH and -NH 2 , so that it has good compatibility with many organic substances, and is easy to chemically modify, and -NH 2 Can be transformed into -NH under certain conditions 3 + , can attract negatively charged substances to produce adsorption, flocculation and other effects. However, in practical applications, chitosan still faces some problems, such as: (1) the free amino group in the molecule can accept protons to form a salt, and will be partially dissolved and lost in acidic aqueous solution; (2) the a...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/28B01J20/30
Inventor 罗川南李香俊冯娟娟孙敏
Owner UNIV OF JINAN
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