Membrane material with adsorption function, and preparation method and application thereof

A functional membrane and reaction technology, applied in analytical materials, chemical instruments and methods, preparation of test samples, etc., can solve problems such as poor adsorption performance, inability to effectively detect sulfonamide drugs, and performance degradation of membrane materials, and achieve sensitivity. High performance, simple preparation method and good stability

Active Publication Date: 2018-12-04
GUIYANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its own hydrophobicity and molecular structure, the polyvinylidene fluoride membrane has poor adsorption performance, and it is necessary to modify the polyvinylidene fluoride membrane to improve the application of the membrane in the field of adsorption.
[0003] At present, the commonly used modification method for membrane materials is the blending method, but the modified membrane materials obtained by blending in the prior art, after a period of use, the modifier is precipitated from the modified membrane material, which will lead to deterioration of the performance of the membrane material. decline
In addition, existing modified polyvinylidene fluoride membranes cannot provide stable and effective detection of sulfonamides in water

Method used

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  • Membrane material with adsorption function, and preparation method and application thereof
  • Membrane material with adsorption function, and preparation method and application thereof
  • Membrane material with adsorption function, and preparation method and application thereof

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preparation example Construction

[0021] According to the second aspect of the present invention, some embodiments of the present invention also provide a method for preparing the above-mentioned adsorption functional membrane material, which includes: condensing a polyvinylidene fluoride matrix film with carboxyl groups and a metal-organic framework material with amino groups The adsorption function membrane material is obtained.

[0022] Specifically, the condensation of the polyvinylidene fluoride matrix film with carboxyl groups and the metal-organic framework material with amino groups specifically includes: first activating the carboxyl groups of the polyvinylidene fluoride matrix film with carboxyl groups, and then activating the carboxyl group-bearing polyvinylidene fluoride matrix film. The polyvinylidene fluoride matrix film reacts with the metal-organic framework material with amino groups. In order to enable the carboxyl group on the polyvinylidene fluoride matrix film to react with the amino group...

Embodiment 1

[0044] A method for preparing an adsorption functional membrane material provided in this embodiment, the steps of the method are as follows:

[0045] (1) Dissolve 0.17g (5mmol) of 5-{2-amino-4-(methoxycarbonyl)phenoxy}isophthalate and 0.6g (15mmol) of NaOH in 20mL of MeOH / water (volume ratio 4:1) solution, heated to reflux for 4h, cooled with ice water, stood overnight, filtered, acidified with dilute hydrochloric acid, washed with water, filtered product, and obtained white powder 5-(2-amino-4-carboxybenzene oxy)-benzene-1,3-dioic acid (ligand), dry. Weigh the ligand obtained above (5-(2-amino-4-carboxyphenoxy)-benzene-1,3-dioic acid) (5mg, 0.015mmol), Zn(NO 3 ) 2 .6H 2 O (17.8mg, 0.06mmol) and 1,2-two (4-pyridine) ethylene (4mg, 0.02mmol) in a 25ml beaker, add 4mL of DMF / water (volume ratio 1:1) solution in the beaker, Heating to 100° C. for 48 h, and then cooling to room temperature gave yellow crystals, which were metal-organic framework materials with amino groups. ...

Embodiment 2

[0050] A method for preparing an adsorption functional membrane material provided in this embodiment, the steps of the method are as follows:

[0051] (1) Dissolve 0.17g (5mmol) of 5-{2-amino-4-(methoxycarbonyl)phenoxy}isophthalate and 0.6g (15mmol) of NaOH in 20mL of MeOH / water (volume ratio 4:1) solution, heated to reflux for 4h, cooled with ice water, stood overnight, filtered, acidified with dilute hydrochloric acid, washed with water, filtered product, and obtained white powder 5-(2-amino-4-carboxybenzene oxy)-benzene-1,3-dioic acid (ligand), dry. Weigh the ligand obtained above (5-(2-amino-4-carboxyphenoxy)-benzene-1,3-dioic acid) (5mg, 0.015mmol), Zn(NO 3 ) 2 .6H 2 O (17.8mg, 0.06mmol) and 1,2-two (4-pyridine) ethylene (4mg, 0.02mmol) in a 25ml beaker, add 4mL of DMF / water (volume ratio 1:1) solution in the beaker, Heating to 100° C. for 48 h, and then cooling to room temperature gave yellow crystals, which were metal-organic framework materials with amino groups. ...

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Abstract

The invention relates to the field of high polymer materials, and particularly relates to a membrane material with an adsorption function, and a preparation method and application thereof. The membrane material is prepared by a reaction of the following components in parts by weight: 15-30 parts of a polyvinylidene fluoride substrate membrane with carboxyl groups, and 0.1-3 parts of a metal-organic framework material with amino groups. The preparation method comprises the following step that condensation is carried out on the polyvinylidene fluoride substrate membrane with carboxyl groups andthe metal-organic framework material with amino groups, so that the membrane material with the adsorption function is obtained, and the metal-organic framework material with amino groups is dispersedon the surface of the polyvinylidene fluoride membrane. The metal-organic framework material can stably exist on the surface of the polyvinylidene fluoride membrane, and the stability is good. The metal-organic framework material formed by the coordination of an oxygen-containing carboxylic acid / amino lingand with metal ions such as Zn<2+> is adopted as an adsorption separation medium, the sulfanilamide medicine residues in a water sample can be measured with the combination of a membrane solid-phase extraction technology and a chromatography, and the sensitivity is high.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to an adsorption function membrane material and its preparation method and application. Background technique [0002] Polyvinylidene fluoride membrane (PVDF for short) is an engineering plastic. Because of its good physical and chemical stability, it is often used as a functional polymer material with excellent performance to prepare flat membrane or hollow fiber membrane, which is used in filtration, water treatment, Adsorption detection and other fields. However, due to its own hydrophobicity and molecular structure, the polyvinylidene fluoride membrane has poor adsorption performance, and it is necessary to modify the polyvinylidene fluoride membrane to improve the application of the membrane in the field of adsorption. [0003] At present, the commonly used modification method for membrane materials is the blending method, but the modified membrane materials obtained by blendin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D71/78C02F1/28C02F1/44G01N1/40C02F101/38
CPCB01D67/0006B01D69/02B01D71/78B01D2325/12C02F1/285C02F1/44C02F2101/38C02F2101/40G01N1/4005G01N1/405G01N2001/4016
Inventor 周婵媛覃慧范东生聂胜强
Owner GUIYANG UNIV
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