2,4-diaminotoluene molecularly imprinted polymer, preparation method and application thereof

A technology of diaminotoluene and molecular imprinting, which is applied in material separation, analytical materials, instruments, etc., can solve the problems of insufficient rigidity of molecularly imprinted polymers, weak binding ability of template molecules, difficult elution of template molecules, etc., and achieve short synthesis time , high specific volume, easy to wash off effect

Active Publication Date: 2015-06-03
SHENZHEN NTEK TESTING TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] In the process of specific recognition of target molecules by molecularly imprinted polymers, there may be reasons such as insufficient rigidity of molecularly imprinted polymers, weak force on target molecules, etc., resulting in low adsorption rate, small adsorption capacity, and difficult elution of template molecules. and other shortcomings
[0007] There have been reported molecularly imprinted polymers of 2,4-diaminotoluene made of methacrylic acid, template molecules and cross-linking agent ethylene glycol dimethacrylate. The molecularly imprinted polymers MIP and NIP are not different. Obviously, the binding ability of MIP to template molecules is weak, and the adsorption capacity is not enough.

Method used

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  • 2,4-diaminotoluene molecularly imprinted polymer, preparation method and application thereof
  • 2,4-diaminotoluene molecularly imprinted polymer, preparation method and application thereof

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[0038] The second object of the present invention is to provide a method for preparing the 2,4-diaminotoluene molecularly imprinted polymer, comprising the following steps:

[0039] 1) Prepolymerization: Mix the functional monomer methacrylic acid (MAA) and the template molecule 2,4-diaminotoluene at a molar ratio of 3.5-4.5:1, add acetonitrile, and stir the prepolymerization at 30-40°C. get prepolymer;

[0040] 2) Cross-linking: add divinylbenzene and AIBN to the prepolymer described in step 1), pass nitrogen gas for 30-50 minutes, and react at 60-70°C to obtain a cross-linked polymer;

[0041] 3) Washing: using methanol-acetic acid with a volume ratio of (8-10):1 to wash the cross-linked polymer described in step 2), after washing away the template molecules, the target molecularly imprinted polymer (MIP) is obtained.

[0042] The third object of the present invention is to provide the application of the above-mentioned 2,4-diaminotoluene molecularly imprinted polymer in so...

Embodiment 1

[0049] 1) Prepolymerization: Take 2g of functional monomer methacrylic acid (MAA), 0.74g of template molecule 2,4-diaminotoluene, add 30mL of acetonitrile, and stir at 35°C for 4h for prepolymerization to obtain a prepolymer;

[0050] 2) Cross-linking: add 1.6 g of divinylbenzene and 0.03 g of AIBN to the prepolymer described in step 1), pass nitrogen gas for 30 min, and react at 60° C. for 8 h to obtain a cross-linked polymer;

[0051] 3) Washing: Add 60 mL of methanol-acetic acid mixed solvent with a volume ratio of 8:1 to the cross-linked polymer obtained in step 2), perform Soxhlet extraction for 6 h, wash away the template molecules, filter and separate, and obtain the target molecularly imprinted polymer ( MIP).

[0052]Using the Soxhlet extraction method, the template molecules are slowly and more completely released from the cross-linked polymer, without destroying the structure of the molecularly imprinted polymer, and improving the 2,4-diaminotoluene in the sample to...

Embodiment 2

[0054] 1) Prepolymerization: take 1.75g ​​of functional monomer methacrylic acid (MAA), 0.74g of template molecule 2,4-diaminotoluene, add 35mL of acetonitrile, and stir at 30°C for 6h for prepolymerization to obtain a prepolymer;

[0055] 2) Cross-linking: add 1.8 g of divinylbenzene and 0.04 g of AIBN to the prepolymer described in step 1), pass nitrogen gas for 50 min, and react at 65° C. for 6 h to obtain a cross-linked polymer;

[0056] 3) Washing: Add 60 mL of methanol-acetic acid mixed solvent with a volume ratio of 8:1 to the cross-linked polymer obtained in step 2), perform Soxhlet extraction for 6 h, wash away the template molecules, filter and separate, and obtain the target molecularly imprinted polymer ( MIP).

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Abstract

The invention discloses a 2,4-diaminotoluene molecularly imprinted polymer, a preparation method and application thereof, and particularly provides the 2,4-diaminotoluene molecularly imprinted polymer prepared from a functional monomer of methyl acrylic acid, a template molecule 2,4-diaminotoluene, and a crosslinking agent divinyl benzene, a preparation method for the molecularly imprinted polymer, and application of the molecularly imprinted polymer to solid phase extraction separation. The 2,4-diaminotoluene molecularly imprinted polymer provided by the invention is more excellent in mechanical property, higher in specific volume, higher in adsorption acting force to 2,4-diaminotoluene, and higher in adsorption capacity to 2,4-diaminotoluene; the preparation method for the 2,4-diaminotoluene molecularly imprinted polymer is short in synthesis time, and the washing of the template molecule is easy; the molecularly imprinted polymer is high in solid phase extraction efficiency to 2,4-diaminotoluene and more thorough in adsorption.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a 2,4-diaminotoluene molecularly imprinted polymer and its preparation and application. Background technique [0002] 2,4-Diaminotoluene is an important industrial organic raw material, easily soluble in hot water and most organic solvents. As an organic dye, 2,4-diaminotoluene has the advantages of simple preparation, complete chromatogram, good shade, and fast dyeing, and is widely used in textile printing and dyeing processes. 2,4-diaminotoluene can be used to prepare toluene diisocyanate (TDI), the binder in composite food packaging materials, and TDI is also easily hydrolyzed to form diaminotoluene. [0003] However, 2,4-diaminotoluene is a primary aromatic amine, which has been shown to be carcinogenic and mutagenic. If diaminotoluene remains in industrial wastewater or packaging materials, it will be harmful to the human body. At present, there are already safety threat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F212/36C08J9/26G01N30/02
Inventor 周业华廖武名周信光
Owner SHENZHEN NTEK TESTING TECH
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