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A kind of preparation method and application of polyamidoamine/rare earth fluorescent imprinting membrane

A rare earth fluorescence and polyamide technology, applied in chemical instruments and methods, other chemical processes, water/sewage treatment, etc., can solve the problems of material separation, analytical precision and accuracy, and achieve superior recognition performance, good thermal stability

Inactive Publication Date: 2019-02-05
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the concentration of the target analyte is very low and the concentration of coexisting interfering substances is large, this competitive adsorption will adversely affect the subsequent separation and detection, such as material separation, analytical precision and accuracy, etc.

Method used

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  • A kind of preparation method and application of polyamidoamine/rare earth fluorescent imprinting membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Weigh 0.225g of thienoyltrifluoroacetone (TTA) and dissolve it in 10ml of ethanol, stir until it dissolves evenly, and adjust the pH to 8.0 with 1mol / L NaOH solution;

[0048] (2) Weigh 0.06g Eu 2 o 3 , add 1mL of concentrated hydrochloric acid (mass fraction: 36.5%) dropwise to make it just dissolve, then add 3mL of water to make it completely dissolve, drop this salt solution into the ethanol solution in step (1), heat up to 60°C, and magnetically stir for 0.5 h;

[0049] (3) Take by weighing 0.06g o-phenanthroline (Phen) and dissolve in 3mL of ethanol, drop this ethanol solution into the above-mentioned mixed solution, join in the round-bottomed flask equipped with a reflux condenser, and stir magnetically at 60°C, Reflux for 3 hours, cool to room temperature, filter with suction, wash with 6 mL of ethanol and 6 mL of water three times respectively, and finally dry in vacuum at 60°C for 24 hours to obtain a complex of europium;

[0050] (4) Weigh 8.5484g dimet...

Embodiment 2

[0062] (1) Weigh 0.3375g of thienoyltrifluoroacetone (TTA) and dissolve it in 15ml of ethanol, stir until it dissolves evenly, and adjust the pH to 8.0 with 2mol / L NaOH solution;

[0063] (2) Weigh 0.09g Eu 2 o 3 , add an appropriate amount of concentrated hydrochloric acid (36.5%) dropwise to make it just dissolve, then add 5mL of water to make it completely dissolve, drop this salt solution into the ethanol solution in step (1), heat up to 60°C, and magnetically stir for 0.5h;

[0064] (3) Take by weighing 0.09g o-phenanthroline (Phen) and dissolve in 5mL of ethanol, drop this ethanol solution into the above-mentioned mixed solution, join in the round bottom flask equipped with reflux condenser, 60 ℃ of magnetic stirring, Reflux for 3 hours, cool to room temperature, filter with suction, wash with 10 mL of ethanol and 10 mL of water three times respectively, and finally dry in vacuum at 60°C for 24 hours to obtain a complex of europium;

[0065] (4) Weigh 25.645g of dimeth...

Embodiment 3

[0077] (1) Weigh 0.675g of thienoyltrifluoroacetone (TTA) and dissolve it in 30mL of ethanol, stir until it dissolves evenly, and adjust the pH to 8.0 with 4mol / L NaOH solution;

[0078] (2) Weigh 0.18g Eu 2 o 3 , add an appropriate amount of concentrated hydrochloric acid (36.5%) dropwise to make it just dissolve, then add 10mL of water to make it completely dissolve, drop this salt solution into the ethanol solution in step (1), heat up to 60°C, and stir magnetically for 0.5h;

[0079] (3) Take by weighing 0.18g o-phenanthroline (Phen) and dissolve in 10mL of ethanol, drop this ethanol solution into the above-mentioned mixed solution, join in the round-bottomed flask equipped with a reflux condenser, magnetically stir at 60°C, Reflux for 3 hours, cool to room temperature, filter with suction, wash with 20 mL of ethanol and 20 mL of water three times respectively, and finally dry in vacuum at 60°C for 24 hours to obtain a complex of europium;

[0080] (4) Weigh 76.935g of d...

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Abstract

The invention provides a polyamide-amine / rare earth fluorescent membrane imprint preparation method and application thereof, the preparation method comprises the steps of preparing europium complex; preparing membrane casting solution; preparing polyamide-amine / rare earth fluorescent membrane imprint; removing template molecule in the polyamide-amine / rare earth fluorescent membrane imprint. In the preparation method, the imprinting process reacts on the surface and insides of the membrane material, and avoids the problem of insufficient obstructing force caused by the traditional template molecule only existing on the surface. Adding chitosan, makes the molecule imprinted polymer be embedded in the membrance, and avoids the falling off of the polymer in the membrane cleaning process. The prepared polyamide-amine / rare earth fluorescent membrane imprint has good heat stability, and superior bisphenol A molecule identification performing ability. Combining the molecule membrane imprint technique with a fluorescent detection technique, establishes a new method of simple, fast, and agile operation and high flux BPA content measurement in food products.

Description

technical field [0001] The invention belongs to the technical field of material preparation and separation, in particular to a preparation method and application of a polyamide-amine / rare earth fluorescent imprinted membrane. Background technique [0002] As a chemical raw material, bisphenol A (BPA) is mainly used in the production of polycarbonate plastics, epoxy resins, flame retardants, antioxidants, coatings and pesticides, and its downstream products are widely used in food packaging, plastic products, etc. In daily necessities that are in direct contact with the human body, bisphenol A can enter the environmental medium through various channels. At the same time, bisphenol A is also an environmental estrogen with strong biological toxicity and endocrine disrupting effect, and it is difficult to degrade, easy to accumulate in the body, and can compete with the human endogenous hormone estradiol to bind to estrogen receptors. Even trace amounts can cause many diseases ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/12C08L5/08C08K9/10C08K5/56C08J5/18B01J20/24B01J20/26B01J20/28B01J20/30C02F1/28
CPCB01J20/24B01J20/262B01J20/28033C02F1/285C08J5/18C08J2301/12C08J2305/08C08L1/12C08L2201/08C08L2203/16C08L5/08C08K9/10C08K5/56
Inventor 孟敏佳崔颜华冯永海戴晓晖刘燕闫永胜
Owner JIANGSU UNIV
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