Metal ion coordination bifunctional monomer molecularly imprinted polymer as well as preparation method and application thereof

A dual-functional monomer, metal ion technology, used in chemical instruments and methods, water pollutants, other chemical processes, etc., to achieve good adsorption and selectivity, improved performance, and good selectivity.

Inactive Publication Date: 2020-10-16
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no report on the application of metal ion-coordinated dual-monomer molecularly imprinted polymers to salicylic acid in water samples.

Method used

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  • Metal ion coordination bifunctional monomer molecularly imprinted polymer as well as preparation method and application thereof
  • Metal ion coordination bifunctional monomer molecularly imprinted polymer as well as preparation method and application thereof
  • Metal ion coordination bifunctional monomer molecularly imprinted polymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] co 2+ Preparation of Coordinated Bifunctional Monomer Molecularly Imprinted Polymer Adsorbents

[0031] (1) Synthesis of Co 2+ Coordinated bifunctional monomer molecularly imprinted polymer: 5.4 mmol 4-vinylpyridine and 7 mmol methacrylic acid were added to 0.6 mL dimethyl sulfoxide, 0.12 mL N'N-dimethylformamide and 1.235 mL 1- Butyl-3-methylimidazolium tetrafluoroborate mixed solution. After mixing, add 0.5 mmol of cobalt acetate, stir for 15 min until completely dissolved, and incubate at room temperature for 1 h.

[0032] (2) Add 2.7 mmol salicylic acid to the above mixed solution, stir for 15 min until completely dissolved, then incubate at 4°C for 4 h to make it completely react. Then add 9 mmol ethylene glycol dimethacrylate and 30 mg azobisisobutyronitrile, mix well, sonicate, pass inert gas for 10 min, and react in a water bath at 60 °C for 20 h. After grinding, sieving, elution and drying, Co 2+ Coordinated bimonomer molecularly imprinted polymer adsorben...

Embodiment 2

[0035] pH vs Co 2+ Effect of Coordinated Bifunctional Monomer Molecularly Imprinted Polymer Sorbent on Adsorption of Salicylic Acid

[0036] Through solid-phase extraction of salicylic acid in solutions with different pH values, the absorption capacity was measured by ultraviolet spectrophotometry. image 3 for Co 2+The adsorption capacity of coordinated bifunctional monomer molecularly imprinted polymer for adsorption of salicylic acid as a function of initial pH value. Its initial salicylic acid concentration: 100 mg / L; adsorbent dosage: 10 mg; flow rate: 2 mL / min; temperature: room temperature; sample volume: 15 ml.

Embodiment 3

[0038] co 2+ Comparison of adsorption capacities of coordinating bifunctional monomer molecularly imprinted polymer adsorbents for specific adsorption of salicylic acid and its analogues

[0039] To investigate Co 2+ The specificity of coordinated bifunctional monomer molecularly imprinted polymers to salicylic acid, phenol, p-nitrophenol and 2,6-dichlorophenol were selected as comparative analogues in this experiment. Experimental results such as Figure 4 Shown, Co 2+ The adsorption capacity of the coordinated bifunctional monomer molecularly imprinted polymer for salicylic acid was 51.13 mg / g, and the IF was 3.66. Compared to salicylic acid, Co 2+ The selectivity factors of coordinated bifunctional monomer molecularly imprinted polymers to phenol, p-nitrophenol and 2,6-dichlorophenol were 3.12, 1.65 and 2.47, respectively, all of which were greater than 1, indicating that Co 2+ Coordinated bifunctional monomer molecularly imprinted polymers have certain selectivity fo...

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Abstract

The invention discloses a metal ion coordination bifunctional monomer molecularly imprinted polymer as well as a preparation method and application thereof as a solid-phase extraction agent, and belongs to the field of adsorption material preparation processes. The preparation method comprises the following steps: providing a specific adsorption site for a molecularly imprinted polymer by using abifunctional monomer, introducing a metal ion Co<2+>, forming a bifunctional monomer-metal ion-template complex with stronger bond energy with the bifunctional monomer and a template, polymerizing, eluting and drying to obtain the metal ion coordination bifunctional monomer molecularly imprinted polymer. Compared with a molecularly imprinted polymer without metal ion mediation, the adsorption capacity (Q=51.13 mg / g) and the selectivity (IF=3.66) of the molecularly imprinted polymer for organic pollutants with intra-molecular hydrogen bonds are increased. Therefore, the material can be used forspecific extraction of organic pollutants in an aqueous solution.

Description

technical field [0001] The invention belongs to the field of preparation technology of adsorption materials, and in particular relates to a metal ion coordination bifunctional monomer molecularly imprinted polymer, a preparation method thereof and an application as a solid-phase extraction agent. Background technique [0002] Due to the rapid development of industry, people's pace of life is getting faster and faster, resulting in the direct discharge of various types of pollutants to surface water, even groundwater, which has a serious impact on the entire ecological environment. As a sewage treatment method, the adsorption method has been widely used due to its advantages of low cost, high efficiency, simple operation, and short time consumption. In the water environment, organic pollutants are the most harmful to the human body. The human body only needs to ingest a small amount, and it will cause irreversible damage to the liver, reproductive system or brain and other im...

Claims

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Application Information

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IPC IPC(8): C08F226/06C08F220/06C08F222/14C08F8/42C08J9/26B01J20/26B01J20/30C02F1/28C02F101/34
CPCB01J20/268C02F1/285C02F2101/34C08F8/42C08F222/102C08F220/06C08F226/06
Inventor 吕海霞胡凯范丹阳
Owner FUZHOU UNIVERSITY
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