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Modified electrode face finish material based on sodium carboxymethyl cellulose, and preparation method

A technology of sodium carboxymethyl cellulose and electrode surface, which is applied in the field of electrode surface modification materials, can solve the problems of limited sensitivity and stability, and achieve good oxidation effect

Inactive Publication Date: 2008-11-19
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this polymer material for electrode modification has good redox conductivity properties, it has limited sensitivity and stability when used to detect hydrogen peroxide and glutamic acid, etc.

Method used

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  • Modified electrode face finish material based on sodium carboxymethyl cellulose, and preparation method
  • Modified electrode face finish material based on sodium carboxymethyl cellulose, and preparation method
  • Modified electrode face finish material based on sodium carboxymethyl cellulose, and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Preparation of Os-CMCNa-g-PVP

[0032] Weigh 1 gram of sodium carboxymethyl cellulose, which has a weight average molecular weight of 90,000 and a degree of substitution of 0.7, and add it to 36 ml of distilled water, blow nitrogen protection, and stir in a constant temperature water bath at 30 degrees Celsius until completely dissolved. Then configure 4 milliliters of 1 mol / liter nitric acid solution containing 110 milligrams of ceric ammonium nitrate, add it into the aqueous solution of sodium carboxymethylcellulose, and stir and react under nitrogen for 30 minutes. Then 2 ml of 4-vinylpyridine was added, and the reaction was stirred for 3 hours under nitrogen. Thereafter, 0.5 ml of 5% hydroquinone aqueous solution was added to terminate the reaction. The reaction mixture is precipitated, filtered, extracted and dried to obtain CMCNa-g-PVP grafted with polyvinylpyridine copolymer of cellulose derivatives. Its branch chain is polyvinylpyridine and its weight aver...

Embodiment 2

[0040] (1) The preparation process of Os-CMCNa-g-PVP is the same as in Example 1

[0041] Weigh 1 gram of sodium carboxymethylcellulose with a weight average molecular weight of 250,000 and a degree of substitution of 1.2, add it to 36 ml of distilled water, protect it with nitrogen gas, and stir in a constant temperature water tank at 30 degrees Celsius until completely dissolved. Then configure 4 milliliters of 1 mol / liter nitric acid solution containing 150 milligrams of ceric ammonium nitrate, add it into the aqueous solution of sodium carboxymethylcellulose, and stir and react under nitrogen for 30 minutes. Then 3 ml of 4-vinylpyridine was added, and the reaction was stirred for 5 hours under nitrogen. Thereafter, 0.5 ml of 5% hydroquinone aqueous solution was added to terminate the reaction. The reaction mixture is precipitated, filtered, extracted and dried to obtain CMCNa-g-PVP grafted with polyvinylpyridine copolymer of cellulose derivatives. Its branch chain is pol...

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Abstract

This invention relates to an electrode-surface-modifying material based on carboxymethyl cellulose sodium modification. The electrode-surface-modifying material is Os-complexed carboxymethyl cellulose sodium grafted poly (vinyl pyridine) (Os-CMCNa-g-PVP). The material has high redox performance and high electrical conductivity, and can be used as an electrode-surface-modifying material for biosensors.

Description

technical field [0001] The invention relates to an electrode surface modification material modified based on sodium carboxymethyl cellulose. Background technique [0002] The emergence of modified electrodes has created a new field of artificially controlling the electrode surface. Among them, polymer materials used to modify electrodes are the most widely studied and applied because of their stability, high efficiency, and sensitivity. This polymeric material has oxidative, reductive and conductive properties and is mainly based on redox-type conductive polymers formed by metal complexation. At present, osmium metal complexed polyvinylpyridine is widely used. Robert J.Forster and Johannes G..Vos reported its synthesis method and its electrochemical and photochemical properties for modifying the electrode surface [Synthesis, Characterization, and Properties of a Series of Osmium-and Ruthenium-Containing Metallopolymers. Macromolecules 23, 4372-4377 (1990)]. Later, Brian A...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/02
Inventor 黄勇刘文勇康宏亮李华清
Owner INST OF CHEM CHINESE ACAD OF SCI