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A preparation method of naringin molecularly imprinted adsorption material on the surface of palm bark

A technology of palm bark and molecular imprinting, applied in chemical instruments and methods, and other chemical processes, can solve the problems of poor controllability, few, and damaged imprinting points, and achieve low production cost, short elution time, and improved income effect

Inactive Publication Date: 2019-02-19
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device required by this method is simple and universal, but there are usually the following problems: (1) The controllability is poor during the grinding process, and some irregular particles are inevitably generated, and some imprinted spots are destroyed at the same time
This kind of natural polymer material has the characteristics of natural, green, biodegradable, high mechanical strength, strong corrosion resistance, etc., and has a large adsorption capacity for dyes. Foreign countries have studied the chemical modification and adsorption performance of palm bark. There are few research reports. The Chinese patent application number is: 201310147720.6, which discloses a preparation method and application of mercapto palm bark adsorbent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of surface-modified palm bark: In the reactor, add ethanol: 80 mL, γ-methacryloxypropyl trimethoxysilane: 25 g, oxidized palm bark: 12 g, at 60 Constant temperature at ±2°C, stirring, and reflux reaction for 5 hours. After the reaction, wash with ethanol, take it out, and dry it in a vacuum oven to obtain surface-modified palm bark;

[0021] (2) Preparation of naringin molecularly imprinted adsorption material on the surface of palm bark: In the reactor, add ethanol: 70 mL, dipentaerythritol triacrylate: 10 g, itaconic acid: 6 g, naringin: 6 g, on the surface Modified palm bark: 20g, azobisisoheptanonitrile: 3.0g, stirred and dissolved, deoxygenated by inert gas for 12min, in an oxygen-free atmosphere, stirred and reacted for 7h at 60±2°C, and the obtained product was mixed with methanol: acetic acid volume ratio Soak in a 3:1 mixed solution for 20 hours, remove the template molecules, and dry to obtain the naringin molecularly imprinted adsorption mater...

Embodiment 2

[0023] (1) Preparation of surface-modified palm bark: In the reactor, add ethanol: 76 mL, γ-methacryloxypropyltrimethoxysilane: 27 g, oxidized palm bark: 13 g, at 60 Constant temperature at ±2°C, stirring, and reflux reaction for 4 hours. After the reaction, wash with ethanol, take it out, and dry it in a vacuum oven to obtain surface-modified palm bark;

[0024] (2) Preparation of naringin molecularly imprinted adsorption material on the surface of palm bark: In the reactor, add ethanol: 76 mL, dipentaerythritol triacrylate: 14 g, itaconic acid: 4 g, naringin: 8 g, on the surface Modified palm bark: 12g, azobisisoheptanonitrile: 2.0g, stirred and dissolved, deoxygenated by inert gas for 12min, in an oxygen-free atmosphere, stirred and reacted for 6h at 60±2°C, and the obtained product was mixed with methanol: acetic acid volume ratio Soak in a 3:1 mixed solution for 20 hours, remove the template molecules, and dry to obtain the naringin molecularly imprinted adsorption materi...

Embodiment 3

[0026](1) Preparation of surface-modified palm bark: In the reactor, add ethanol: 84 mL, γ-methacryloxypropyltrimethoxysilane: 24 g, oxidized palm bark: 10 g, at 60 Constant temperature at ±2°C, stirring, and reflux reaction for 6 hours. After the reaction, wash with ethanol, take it out, and dry it in a vacuum oven to obtain surface-modified palm bark;

[0027] (2) Preparation of adsorption material for molecular imprinting of naringin on the surface of palm bark: In the reactor, add ethanol: 63 mL, dipentaerythritol triacrylate: 13 g, itaconic acid: 8 g, naringin: 7 g, on the surface Modified palm bark: 19g, azobisisoheptanonitrile: 3.0g, stir to dissolve, pass inert gas to deoxygenate for 12min, in an oxygen-free atmosphere, stir and react at 60±2°C for 8h, and the obtained product is mixed with methanol:acetic acid volume ratio Soak in a 3:1 mixed solution for 20 hours, remove the template molecules, and dry to obtain the naringin molecularly imprinted adsorption material ...

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Abstract

The invention discloses a preparation method of a palm tree bark surface naringin molecularly imprinted adsorbent material. The preparation method comprises carrying out surface modification on oxidized palm tree bark through gamma-methacryloxypropyltrimethoxysilane to obtain surface-modified palm tree bark, adding 50 to 60% by mass of ethanol, 8 to 14% by mass of dipentaerythritol triacrylate, 4 to 8% by mass of itaconic acid, 4.0 to 8% by mass of naringin, 12 to 20% by mass of the surface-modified palm tree bark and 1.0 to 3.0% by mass of azobisisoheptonitrile into a reactor, carrying out stirring without oxygen for a reaction, removing the template molecules through a mixture of methanol and acetic acid and carrying out drying to obtain the palm tree bark surface naringin molecularly imprinted adsorbent material. The adsorbent material has a specific recognition capability to naringin, high selectivity, good mechanical properties, good chemical stability and a fast adsorption speed, is easy to elute and is biodegradable. The preparation method has simple processes, has a regeneration capability and has environmental friendliness.

Description

technical field [0001] The invention relates to a preparation method and application technology of a molecularly imprinted adsorption material, in particular to a preparation method of a molecularly imprinted adsorption material for naringin on the surface of palm bark, which belongs to the technical field of separation material applications. Background technique [0002] Naringin is a dihydroflavonoid compound, mainly found in the peel and fruit of citrus plants, and the peel has the highest naringin content. Naringin (alias: naringin, citrusin, isohesperidin), its molecular formula is C 27 h 32 o 14 , the relative molecular mass is 580.53, white to light yellow crystalline powder, soluble in methanol, ethanol, acetone, acetic acid, dilute alkali solution and hot water, the solubility in water is 0.1% at room temperature, and can reach 10% at 75°C . Insoluble in non-polar solvents such as petroleum ether, ether, benzene and chloroform. Naringin is a flavonoid compound....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30
CPCB01J20/268
Inventor 李慧芝杨秋苹李晓峰
Owner UNIV OF JINAN
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