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Preparation method and application of a temperature-sensitive graphene oxide-based imprinted polymer

An imprinted polymer and graphene-based technology, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of increasing the difficulty of detection and processing, and achieve the effect of solving the disadvantage of elution

Active Publication Date: 2018-02-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, p-NP exists in low concentration in the environment and is water-soluble, and is affected by other interfering substances, which will increase the difficulty of its detection and processing

Method used

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  • Preparation method and application of a temperature-sensitive graphene oxide-based imprinted polymer
  • Preparation method and application of a temperature-sensitive graphene oxide-based imprinted polymer
  • Preparation method and application of a temperature-sensitive graphene oxide-based imprinted polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of graphene oxide modified by RAFT reagent (GO-RAFT)

[0032] Graphene oxide (GO) used in the present invention is synthesized (W.S.Hummers, R.E.Offeman.Preparation of graphitic oxide.Journal of the American Chemical Society, 1958,80 (6): 1339- 1339), the RAFT reagent is S-n-dodecyl-S'-(2-methyl-2-propionyl) trithiocarbonate (DDMAT) prepared according to the literature (J.T.Lai, D.Filla, R .Shea.Functional polymers from novel carboxyl-terminated trithiocarbonates as highly efficient RAFT agents.Macromolecules,2002,35(18):6754-6756). Then, through the condensation reaction between the hydroxyl groups on the GO surface and the carboxyl groups on the DDMAT, the RAFT reagent is grafted onto the GO surface. The specific steps are as follows (this step is an existing method):

[0033] Take 50mg of GO and disperse in 50mL of dimethyl sulfoxide (DMF) solvent, ultrasonically disperse for 30min, and add 109.3mg of DDMAT after it is uniformly dispersed. In additi...

Embodiment 2

[0044] (1) Preparation of temperature-sensitive graphene oxide-based imprinted polymer (GT-MIP)

[0045] Graphene oxide modified by RAFT reagent (GO-RAFT) was prepared as described in Example 1.

[0046] Take 27.8mg of p-NP and 50μL of MAA and add it to 5mL of dilute ethanol solution, oscillate to disperse evenly, and keep it in a dark place for 12h. Then, in a stoppered conical flask made of quartz, take 40 mg of the synthesized GO-RAFT and add it to 20 mL of dilute ethanol solution. and 10 μL HMPF. Disperse evenly, stir with magnetic force, and seal with nitrogen gas for deoxygenation. Then light reaction for 2h. After the reaction, centrifuge and wash several times with dilute ethanol solution to remove unreacted residual monomers and cross-linking agents. Then re-disperse in an aqueous solution containing 5% acetic acid, first stir at room temperature for 1 hour, then stir in a 50°C water bath for 1 hour, and remove the clear liquid after standing for 60 minutes. Repea...

Embodiment 3

[0053] (1) Preparation of temperature-sensitive graphene oxide-based imprinted polymer (GT-MIP)

[0054] Graphene oxide modified by RAFT reagent (GO-RAFT) was prepared as described in Example 1.

[0055] Take 13.9 mg of p-NP and 25 μL of MAA and add it to 5 mL of dilute ethanol solution, oscillate to disperse evenly, and keep it in a dark place for 12 hours. Then, in a stoppered conical flask made of quartz, 50 mg of the synthesized GO-RAFT was added to 20 mL of dilute ethanol solution. and 5 μL HMPF. Disperse evenly, stir with magnetic force, and seal with nitrogen gas for deoxygenation. Then light reaction for 4h. After the reaction, centrifuge and wash several times with dilute ethanol solution to remove unreacted residual monomers and cross-linking agents. The template molecules were eluted according to Example 1, and then freeze-dried to obtain the imprinted polymer GT-MIP.

[0056] At the same time, the corresponding non-imprinted polymer (GT-NIP) was synthesized fo...

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Abstract

The invention provides a preparation method of a temperature-sensitive graphene oxide-based imprinted polymer and an application thereof. The preparation method comprises the following steps: (1) preparing S-n-dodecyl-S'-(2-methyl-2-propionyloxy)trithiocarbonate modified graphene oxide RAFT-GO; and (2) preparing the temperature-sensitive graphene oxide-based imprinted polymer GT-MIP. As a molecular imprinting material, the temperature-sensitive graphene oxide-based imprinted polymer prepared in the invention has specific recognition ability for the template molecule p-nitrophenol and can selectively adsorb and separate the target in a complex environment.

Description

technical field [0001] The invention relates to a preparation method and application of a temperature-sensitive graphene oxide-based imprinted polymer, and belongs to the fields of material preparation, separation technology and environmental treatment. Background technique [0002] In recent years, molecular imprinting technology has been widely used in the fields of solid phase extraction, chromatographic separation, biosensor and membrane separation because of its ability to synthesize materials for targeted recognition of target molecules. Among them, surface molecularly imprinted polymers (MIPs), based on the fact that their specific recognition sites are located on the surface of the polymer or the surface of the matrix material, can effectively avoid the template molecules being too deeply embedded and difficult to elute, which is difficult to elute and transfer due to the high degree of crosslinking in the traditional polymerization method. However, problems such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F222/38C08F220/54C08F220/06C08F2/48B01J20/286B01J20/30
CPCB01J20/28011B01J20/286C08F2/48C08F292/00C08F2438/03C08F222/385
Inventor 刘燕钟国星孟敏佳刘方方
Owner JIANGSU UNIV
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