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Method for preparing surface molecularly imprinted material based on titania nanowires

A surface molecular imprinting, titanium dioxide technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of poor accessibility, slow recognition speed, uneven binding sites, etc., to avoid difficult plasticization, improve selectivity, Good light stabilization

Inactive Publication Date: 2015-05-13
INSPECTION & QUARANTINE COMPREHENSIVE TECH CENT JIANGXI ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Molecular imprinting technology is a template molecule-oriented technology to design and synthesize cross-linked polymers that have specific recognition capabilities for a certain type or type of analyte. Molecularly imprinted polymers are resistant to harsh external environments (high temperature, high pressure, strong acid , strong alkali, organic reagents, etc.) have strong tolerance, good stability, long service life, and wide application range, and have gradually attracted people's attention. However, molecularly imprinted polymers prepared by traditional bulk polymerization have uneven binding sites, Technical problems such as poor accessibility and slow recognition speed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: a. Weigh 0.3 g of malathion and dissolve it in 4 mL of methanol solution, add 2 mL of functional monomer 3-aminopropyltriethoxysilane, ultrasonicate for 30 min at room temperature, and place it in a refrigerator at 4°C. Leave overnight, after returning to room temperature, add 4 mL ethyl orthosilicate, stir for 30 min, add 0.5 g titanium dioxide nanowires, stir for 30 min, add 1 ml 1.0 mol / L acetic acid to catalyze hydrolysis condensation. After the above mixture was stirred at 25°C for 40 minutes, it was hydrolyzed and condensed at room temperature for 24 hours, then filtered, and aged at 100°C for 12 hours. In the container, wash repeatedly with methanol-acetic acid (9+1, V+V) for 24 hours to remove template molecules, take out the polymer and place it in a Buchner funnel with two layers of filter paper for suction filtration, wash with water until neutral, and then Wash with 40mL methanol three times, dry at 70°C, store in a desiccator for later use, and o...

Embodiment 2

[0016] Example 2 a. Weigh 0.4 g of malathion and dissolve it in 5 mL of methanol solution, add 1 mL of functional monomer 3-aminopropyltriethoxysilane, sonicate for 30 min at room temperature, and let it stand in a refrigerator at 4°C overnight. After returning to room temperature, 8 mL of ethyl orthosilicate was added, and after stirring for 30 min, 1 g of titanium dioxide nanowires was added, and after stirring for 30 min, 2 ml of 1.0 mol / L acetic acid was added to catalyze the hydrolytic condensation. After the above mixture was stirred at 25°C for 40 minutes, it was hydrolyzed and condensed at room temperature for 24 hours, then filtered, and aged at 120°C for 10 hours. In the container, wash repeatedly with methanol-acetic acid (9+1, V+V) for 24 hours to remove template molecules, take out the polymer and place it in a Buchner funnel with two layers of filter paper for suction filtration, wash with water until neutral, and then Wash with 40mL methanol three times, dry at...

Embodiment 3

[0017] Example 3 a. Weigh 0.3 g of malathion and dissolve it in 4 mL of methanol solution, add 4 mL of functional monomer 3-aminopropyltriethoxysilane, sonicate for 30 min at room temperature, and let it stand in a refrigerator at 4°C overnight. After returning to room temperature, 8 mL of ethyl orthosilicate was added, and after stirring for 30 min, 1 g of titanium dioxide nanowires was added, and after stirring for 30 min, 2 ml of 1.0 mol / L acetic acid was added to catalyze the hydrolysis and condensation. After the above mixture was stirred at 25°C for 40 minutes, it was hydrolyzed and condensed at room temperature for 24 hours, then filtered, and aged at 110°C for 14 hours. In the container, wash repeatedly with methanol-acetic acid (9+1, V+V) for 24 hours to remove template molecules, take out the polymer and place it in a Buchner funnel with two layers of filter paper for suction filtration, wash with water until neutral, and then Wash with 40mL methanol three times, dr...

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PUM

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Abstract

The invention relates to a method for preparing a surface molecularly imprinted material based on titania nanowires. The method comprises the following steps: adding template molecules and functional monomers in an organic solvent for interaction to form a host-guest coordination compound; then adding a cross-linking agent and a titania nanowire carrier, adding acetic acid for catalytic hydrolysis to realize sol-gel reaction, and covering the surface of titania nanowires with a layer of molecularly imprinted polymer with high crosslinking; after high temperature aging, eluting or dissociating the template molecules in the polymer product. The operability is strong, and the manufacture cost is low. Almost all binding sites of surface molecular imprinting are distributed on the surface with good accessibility, and the problems of nonuniform binding sites, poor accessibility, low recognition speed and the like of the molecularly imprinted polymer prepared by the traditional mass polymerization are solved. The elution of the template molecules and the recombination of the template molecules and target molecules are facilitated, and the selectivity of the target molecules is improved.

Description

technical field [0001] The invention relates to the technical field of molecularly imprinted materials, in particular to a method for preparing surface molecularly imprinted materials based on titanium dioxide nanowires. Background technique [0002] Molecular imprinting technology is a template molecule-oriented technology to design and synthesize cross-linked polymers that have specific recognition capabilities for a certain type or type of analyte. Molecularly imprinted polymers are resistant to harsh external environments (high temperature, high pressure, strong acid , strong alkali, organic reagents, etc.) have strong tolerance, good stability, long service life, and wide application range, and have gradually attracted people's attention. However, molecularly imprinted polymers prepared by traditional bulk polymerization have uneven binding sites, Technical problems such as poor accessibility and slow recognition speed. Contents of the invention [0003] In order to ...

Claims

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Application Information

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IPC IPC(8): C08G77/26C08G77/06C08K3/22C08J9/26B01J20/26B01J20/30
Inventor 左海根祝建新石磊占春瑞郭平
Owner INSPECTION & QUARANTINE COMPREHENSIVE TECH CENT JIANGXI ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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