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A kind of preparation method of anti-biological pollution coating on sensor electrode surface

An anti-biological pollution, sensor electrode technology, applied in the direction of material electrochemical variables, etc., can solve the problems of blood component metabolism detection error, inability to fully express the real situation, blood sample centrifugation processing pollution, etc., to achieve long-term stable anti-biological pollution ability, Strong anti-biological pollution ability and the effect of inhibiting non-specific adsorption

Active Publication Date: 2020-01-10
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are some obvious defects in this processing method: the biochemical analysis process requires centrifugation facilities, which is very inconvenient for small clinics, families or online rapid testing; blood samples may be contaminated during centrifugation; due to the long time Therefore, it will cause detection errors caused by the metabolism of blood components that cannot be ignored. In addition, after the concentration of the target substance in the serum is detected, it needs to be converted by an empirical formula, but the final result cannot fully express the concentration of the whole blood. the real situation of
Although this method exhibits good anti-bioadhesion properties, this anti-adhesion is only effective in the short term. As the drug is consumed, the anti-protein contamination effect of this coating will gradually decrease.
In recent years, some zwitterionic polymers and hydrophilic polymers have been widely used in avidin adhesion coatings. However, these polymers lack suitable structures and are difficult to anchor on the surface of conductive substrates for a long time.

Method used

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  • A kind of preparation method of anti-biological pollution coating on sensor electrode surface
  • A kind of preparation method of anti-biological pollution coating on sensor electrode surface
  • A kind of preparation method of anti-biological pollution coating on sensor electrode surface

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Embodiment 1

[0028] A preparation method for an anti-biological contamination coating on the surface of a sensor electrode, comprising the following specific steps:

[0029] (1) Synthesis of photosensitive hyaluronic acid

[0030] Dissolve 1.0g of hyaluronic acid (HA) in water and stir until completely dissolved to form an aqueous solution of hyaluronic acid; add 4-dimethylaminopyridine (DMAP) in sequence (the amount of the substance is 0.4 times the number of HA repeating units), Glycidyl methacrylate (GMA) (10 times the number of HA repeating units), tetrabutylammonium bromide (TBAB) (the amount of the substance is 0.8 times the number of HA repeating units), react at room temperature for 48h; Precipitate with acetone, transfer to a dialysis bag for dialysis against water for 4 days; freeze-dry the dialyzed solution to obtain photosensitive hyaluronic acid HA-GMA, store it in the dark for future use;

[0031] (2) Preparation of anti-biological contamination coating

[0032] Dissolve 50...

Embodiment 2

[0034] A preparation method for an anti-biological contamination coating on the surface of a sensor electrode, comprising the following specific steps:

[0035] (1) Synthesis of photosensitive hyaluronic acid

[0036] Dissolve 0.5g of hyaluronic acid (HA) in water and stir until completely dissolved to form a hyaluronic acid aqueous solution; add 4-dimethylaminopyridine (DMAP) in sequence (the amount of the substance is 1 times the number of HA repeating units), Glycidyl methacrylate (GMA) (5 times the number of HA repeating units), tetrabutylammonium bromide (TBAB) (the amount of the substance is 1 times the number of HA repeating units), react at room temperature for 24h; Precipitate with acetone, transfer to a dialysis bag for dialysis against water for 7 days; freeze-dry the dialyzed solution to obtain photosensitive hyaluronic acid HA-GMA, store it in the dark for future use;

[0037] (2) Preparation of anti-biological contamination coating

[0038] Dissolve 20 mg of ph...

Embodiment 3

[0040] A preparation method for an anti-biological contamination coating on the surface of a sensor electrode, comprising the following specific steps:

[0041] (1) Synthesis of photosensitive hyaluronic acid

[0042]Dissolve 1 g of hyaluronic acid (HA) in water and stir until it is completely dissolved to form an aqueous solution of hyaluronic acid; sequentially add 4-dimethylaminopyridine (DMAP) (the amount of the substance is twice the number of HA repeating units), formazan Hydroxyethyl acrylate (HEMA) (20 times the number of HA repeating units), tetrabutylammonium bromide (TBAB) (the amount of the substance is 4 times the number of HA repeating units), react at room temperature for 12h; Precipitation, transferred to dialysis bag for dialysis against water for 7 days; freeze-dried the dialyzed solution to obtain photosensitive hyaluronic acid HA-HEMA, and stored it away from light for later use;

[0043] (2) Preparation of anti-biological contamination coating

[0044] D...

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Abstract

The invention discloses a preparation method of a sensor electrode surface anti-biological-pollution coating. The method is characterized by comprising two major steps of synthesizing photosensitive hyaluronic acid and preparing an anti-biological-pollution coating. The prepared photosensitive hyaluronic acid has high hydrophilcity, optical crosslinking performance and good biocompatibility. The synthesis of the photosensitive hyaluronic acid is simple; the raw materials can be easily obtained; the industrial production can be easily realized; through the introduction of photosensitive monomers, on the basis that the coating achieves the self excellent characteristics of the hyaluronic acid, the coating structure can be fixed through ultraviolet light crosslinking. When the photosensitivehyaluronic acid is applied to raw liquid sample detection, a sensor electrode based on modification by the photosensitive hyaluronic acid coating has long-term and efficient anti-biological-pollutioncapability. The light crosslinking technology, the functional coating technology and the biosensing technology are combined; the preparation method can be widely applied to the fields of food safety,biological medicine, environment protection monitoring, life safety and the like.

Description

technical field [0001] The invention relates to the fields of polymer materials, biological functional coatings and electrochemical sensors, in particular to a method for preparing an anti-biological pollution coating by modifying the surface of sensor electrodes with photosensitive hyaluronic acid. Background technique [0002] When traditional biosensors are directly in contact with raw actual samples (such as blood, milk, juice, and domestic sewage) to detect the components, the surface of the electrode will be polluted due to the adhesion of proteins, blood cells, and microorganisms, which will reduce the detection sensitivity and service life. , or even lead to complete failure. Take blood analysis as an example. At present, when analyzing actual blood, it is first necessary to use centrifugal separation technology to process the blood, and then use a biochemical analyzer to detect the target substance in the separated serum. There are some obvious defects in this proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
CPCG01N27/30
Inventor 刘晓亚许升赵伟吴倩朱晓洁陈彦儒
Owner JIANGNAN UNIV
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