Preparation method of imprinting material for detecting dioctyl phthalate

A technology for dioctyl phthalate and imprinted materials, which is applied in the field of preparation of imprinted materials for detection of dioctyl phthalate, can solve the problems of poor selectivity of molecular imprinted materials, and achieve good environmental compatibility and high stability properties, increasing the specific surface area

Inactive Publication Date: 2019-09-10
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the present invention aims to solve one of the problems; the present invention provides a method for preparing a polymer material based on the size, shap

Method used

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  • Preparation method of imprinting material for detecting dioctyl phthalate
  • Preparation method of imprinting material for detecting dioctyl phthalate
  • Preparation method of imprinting material for detecting dioctyl phthalate

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Step 1, preparation of silica nanoparticles: first, mix 12.5mL of absolute ethanol / methanol / isopropanol and 1.05mL of ultrapure water in a three-necked flask; then, add 0.305mL of ammonia water to the solution, Adjust the pH to 10; slowly add 2.1mL tetraethyl orthosilicate and 2.5mL ethanol mixture into the above solution slowly; then, heat in a water bath at 25°C and mechanically stir for 24h; finally, centrifuge the obtained colloidal solution (9000 rev / min), ultrasonically cleaned 5 times with ethanol, vacuum dried at 40°C for 12h, recorded as: SiO 2 .

[0032] Step 2. SiO modified by γ-(methacryloyloxy)propyltrimethoxysilane2 : First 2.5g SiO 2 and 50mL of methanol into a 125mL three-necked flask, ultrasonicated for 15min; then 0.2mL of ammonia water was added to the SiO 2 In the suspension, under heating in a water bath at 45°C, stir mechanically, and slowly add 0.125g of γ-(methacryloyloxy)propyltrimethoxysilane dropwise to the above solution during this process...

Embodiment 2

[0036] Step 1. Preparation of silica nanoparticles: First, mix 25 mL of absolute ethanol / methanol / isopropanol and 2.1 mL of ultrapure water in a three-necked flask; then, add 0.61 mL of ammonia to the solution, Adjust the pH to 10; then slowly add 4.2mL tetraethyl orthosilicate and 5mL ethanol mixture dropwise into the above solution; then, heat in a water bath at 25°C and mechanically stir for 24h; finally, centrifuge the obtained colloidal solution ( 9000 rev / min), ultrasonic cleaning with ethanol 5 times, vacuum drying at 40°C for 12h, denoted as: SiO 2 .

[0037] Step 2. SiO modified by γ-(methacryloyloxy)propyltrimethoxysilane 2 : First 5g SiO 2 and 100mL of methanol into a 250mL three-neck flask, ultrasonicated for 15min; then 0.3mL of ammonia water was added to the SiO 2 In the suspension, under heating in a water bath at 45°C, stir mechanically, and slowly add 0.25g of γ-(methacryloyloxy)propyltrimethoxysilane to the above solution dropwise during this process; afte...

Embodiment 3

[0041] Step 1. Preparation of silica nanoparticles: First, mix 37.5 mL of absolute ethanol / methanol / isopropanol and 3.15 mL of ultrapure water in a three-necked flask; then, add 0.915 mL of ammonia to the solution , adjust the pH to 10; then slowly drop the mixture of 6.3mL tetraethyl orthosilicate and 7.5mL ethanol into the above solution; then, heat in a water bath at 25°C and mechanically stir for 24h; finally, the obtained colloidal solution Centrifuge (9000 rev / min), ultrasonically clean with ethanol 5 times, vacuum dry at 40°C for 12h, record as: SiO 2 .

[0042] Step 2. SiO modified by γ-(methacryloyloxy)propyltrimethoxysilane 2 : first 7.5g SiO 2 and 150mL of methanol into a 250mL three-necked flask, ultrasonicated for 15min; then 0.4mL of ammonia water was added to the SiO 2 In the suspension, under heating in a water bath at 45°C, stir mechanically, and slowly add 0.375g of γ-(methacryloyloxy)propyltrimethoxysilane to the above solution dropwise during this proces...

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Abstract

The invention belongs to the technical field of detection material preparation, and relates to a preparation method of an imprinting material for detecting dioctyl phthalate. The method comprises thefollowing steps: synthesizing silica nanoparticles and then modifying the surface of silica to obtain KH-570 modified SiO2, performing mixing with methacrylic acid and Triton X-100, adjusting pH and then adding dioctyl phthalate, ethylene dimethacrylate, toluene and azobisisobutyronitrile, and performing ultrasonic treatment and shaking and then performing standing to obtain a Pickering emulsion;and introducing nitrogen, performing washing and vacuum drying on an obtained reaction product, then adding the product into an aqueous solution of hydrofluoric acid, performing shaking at a constanttemperature, and performing extracting, washing and vacuum drying to obtain the imprinting material. A preparation method of a porous matrix imprinting material with a same micro ''cavity'' structureas a target molecule based on size and shape is provided, the problem of poor selectivity of a traditional direct embedding method is solved, and the imprinting material is successfully applied to high-efficiency detection of dioctyl phthalate in bottled water.

Description

technical field [0001] The invention belongs to the technical field of detection material preparation, and specifically refers to a preparation method for detection of dioctyl phthalate imprinted material. Background technique [0002] Molecular imprinting technique (MIT) simulates the molecular recognition between enzymes and substrates, antibodies and antigens in nature, and uses target molecules as templates to prepare polymers (molecular imprinting polymers) with specific and selective recognition functions for the molecules. imprinting polymers, MIPs) a technology. In the preparation process of MIPs, template molecules and functional monomers in the pre-polymerization solution are combined through covalent or non-covalent interactions, and the cross-linking agent and functional monomers form a three-dimensional polymer network around the template molecules in the presence of an initiator. structure, and finally remove the template molecule by a specific method to obtai...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28G01N33/18C02F101/34
CPCB01J20/268B01J20/28019C02F1/285C02F2101/34G01N33/1826
Inventor 杨文明蒲艳玲倪晓霓张林松陈波栾雨曹云飞姚静樊婷黄卫红
Owner JIANGSU UNIV
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