Functionalized polyaniline nanometer material, molecular imprinted polymers (MIP) composite, molecular imprinted sensor, electrochemical testing equipment and preparation method of MIP composite

Abstract

The invention provides a functionalized polyaniline nanometer material which comprises an olefinic function monomer or an olefinic function monomer layer combined on the surface of the nanometer material; further, imprint polymerization selectivity is induced so as to generate the polyaniline-molecular imprinted polymers (MIP) composite with a shell-core structure through an olefinic link which is decorated on the surface of polyaniline nanometer fibre and is in the olefinic function monomer layer; and specially, a nitrobenzene compound or an insecticide is used, 1,3-dinitro benzene (DNB) or ethyl parathion is preferentially utilized as a template molecule, thereby obtaining the polyaniline-MIP composite used for detecting the nitrobenzene compound or the insecticide. The invention also relates to a molecular imprinted sensor prepared from the MIP composite and an electrochemistry testing equipment and preparation method of the MIP composite.

Description

technical field [0001] The present invention relates to the field of molecularly imprinted polymers, including polyaniline nanomaterials for molecularly imprinted polymer composites, molecularly imprinted polymer composites with a core-shell structure formed by the polyaniline nanomaterials, and then polymerizing the molecularly imprinted polymers The complex is used to prepare a molecular imprinted sensor, which is used in detection to form an electrochemical detection device including the molecular imprinted sensor. Background technique [0002] Molecular Imprinted Polymers (MIP) has the advantages of good mechanical stability, high chemical selectivity, low cost, and easy preparation, and has a wide range of applications in separation, detection, chemical sensors, and biomedical materials. increasing interest of researchers. During the synthesis process, according to the different objects to be detected (imprinted molecules or template molecules), appropriate functional ...

AI Technical Summary

Problems solved by technology

[0004] Although traditional molecularly imprinted polymers have the advantages of good mechanical stability, high chemical selectivity, low cost, and easy preparation, however, the molecularly imprinted polymers obtained by this method usually have the following defects: due to poor controllability of the grinding process , will produce a large number of irregular particles, and destroy part of the imprinted cavity at the same time; the prepared polymer is highly cross-linked, which makes the elution of internal template molecules difficult, and the residual template molecules desorb slowly during use. Applications such as trace analysis bring large errors; the distribution of imprinted sites is not uniform, some are on the particle pore wall, and the mass transfer rate of template molecules to these sites is faster, while others are embedded in the polymer body Among them, due to the influence of steric hindrance, the accessibility of this part of imprinted holes is poor, and the rate of recombination with template molecules is slow, thereby reducing the utilization rate of imprinted sites, especially for biological macromolecules, the impact is more serious

Although polyaniline nanofibers have unique conductive properties and large surface area, there is no report on the synthesis of molecularly imprinted polymers through ideal functionalized PANI nanomaterials.

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