Plasticizer-free molecularly imprinted polymer membrane ion-selective electrode sensitive membrane

An ion-selective, polymer membrane technology, used in alkali metal compounds, inorganic chemistry, analytical materials, etc., can solve problems such as interference with sample composition, shortened sensor life, unstable response, etc., to achieve good universality, avoid Leakage problem, good stability effect

Active Publication Date: 2020-08-18
YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the electrode is used for detection, the plasticizer in the sensitive film will seep into the detection sample, and the plasticizer will lead to shortened life of the sensor, unstable response, and interference with the composition of the sample.
In addition, plasticizers are toxic, causing long-term or short-term toxic reactions

Method used

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  • Plasticizer-free molecularly imprinted polymer membrane ion-selective electrode sensitive membrane
  • Plasticizer-free molecularly imprinted polymer membrane ion-selective electrode sensitive membrane
  • Plasticizer-free molecularly imprinted polymer membrane ion-selective electrode sensitive membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Using methyl methacrylate-di-2-ethylhexyldecyl ester copolymer as the sensitive membrane matrix, the invention adopts a molecularly imprinted polymer membrane ion-selective electrode without plasticizer to realize the organic pollutant bisphenol A molecule detection as an example. The specific steps are as follows:

[0030] a. Preparation of bisphenol A molecularly imprinted polymer: Take 0.5mM bisphenol A, 2mM α-methacrylic acid monomer and 25mL acetonitrile solution in a 50mL glass bottle, let it stand for 1h, then add 10mM cross-linking polymer to the above solution Agent divinylbenzene and 25mg initiator azobisisobutyronitrile. Ultrasonic vibration for 10 minutes, nitrogen gas for 15 minutes, and the glass bottle was sealed while nitrogen gas was passed. The above reaction vessel was moved to an oil bath, and reacted at 60° C. for 18 hours to obtain white solid particles.

[0031] After the reaction, the resulting white particles were washed six times with methan...

Embodiment 2

[0040] Using methyl methacrylate-n-butyl acrylate copolymer as a sensitive membrane matrix, the present invention uses a molecularly imprinted polymer membrane ion-selective electrode without a plasticizer to realize the molecular detection of organic pollutant bisphenol A as an example.

[0041] Except that the comonomer was replaced by n-butyl acrylate from di-2-ethylhexyldecyl ester, the rest of the steps were as in step a-e of Example 1.

Embodiment 3

[0043] Using methyl methacrylate-isodecyl acrylate copolymer as a sensitive membrane substrate, the present invention uses a molecularly imprinted polymer membrane ion-selective electrode without a plasticizer to realize the molecular detection of organic pollutant bisphenol A as an example.

[0044] Except that the comonomer was changed from di-2-ethylhexyldecyl to isocenyl acrylate, the rest of the steps refer to steps a-e of Example 1.

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Abstract

The invention relates to a polymer membrane ion-selective electrode sensitive membrane and particularly relates to a plasticizer-free molecularly imprinted polymer membrane ion-selective electrode sensitive membrane. The sensitive film contains a molecularly imprinted polymer serving as a recognition carrier and an electrode sensitive film matrix; wherein the electrode sensitive film matrix is a methyl methacrylate copolymer. According to the method disclosed by the invention, the use of a plasticizer-containing polyvinyl chloride (PVC) matrix in the preparation of a traditional molecularly imprinted polymer membrane ion selective electrode sensitive membrane is avoided, so that the problem of plasticizer leakage always existing in the PVC matrix is eliminated, the stability of the electrode is effectively improved, the service life of the electrode is effectively prolonged, and the biocompatibility of the electrode is effectively improved.

Description

technical field [0001] The invention relates to a polymer membrane ion-selective electrode sensitive membrane, in particular to a plasticizer-free molecularly imprinted polymer membrane ion-selective electrode sensitive membrane. Background technique [0002] Polymer membrane ion-selective electrodes are an important branch of electrochemical sensors. Its research began in the 1960s. Its detection principle is based on the relationship between the response potential of the sensitive membrane and the ion activity of the analyte in accordance with Nernst. equation. At present, this type of electrode has been widely used in the direct determination of various ions in whole blood, serum, urine, tissue, intracellular fluid and its dilutions, and has attracted widespread attention in recent years. [0003] Molecularly imprinted polymer is a new type of functional material with molecular recognition ability developed in recent years. It has the characteristics of predetermined str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/333C08F220/18C08F220/14B01J20/26B01J20/28B01J20/30
CPCG01N27/3335C08F220/1808C08F220/1804C08F220/1811B01J20/268B01J20/28033C08F220/14
Inventor 梁荣宁刘凯凯
Owner YANTAI INST OF COASTAL ZONE RES CHINESE ACAD OF SCI
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