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Method for modifying surface of metal material by using phenolic derivative amino polysaccharide polymer by virtue of electrochemical method

An amino polysaccharide and metal material technology, applied in the direction of electrolytic organic material coating, etc., can solve the problem of long film formation time, and achieve the effects of strong adhesion, improved surface physical and chemical properties, and uniform coating.

Inactive Publication Date: 2014-09-03
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has mild conditions, but it takes a long time to form a film, usually 24 hours. In addition, this method also faces problems such as coating strength, adhesion and coverage

Method used

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  • Method for modifying surface of metal material by using phenolic derivative amino polysaccharide polymer by virtue of electrochemical method
  • Method for modifying surface of metal material by using phenolic derivative amino polysaccharide polymer by virtue of electrochemical method

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Effect test

Embodiment 1

[0025] Such as figure 1 Shown, a kind of method that the phenolic derivative-amino polysaccharide polymer is coated on the metal material surface uniformly fast. The electroplatable phenolic derivatives-aminopolysaccharide polymer prepared by the Mannich method is used to electrochemically modify the metal surface in the electrolytic cell. The specific process is:

[0026] (1) Weigh 1000mg chitosan, 50mg paraformaldehyde, 1000mg catechol at room temperature, dissolve in 20ml 0.1 M hydrochloric acid solution, mix the three and stir at 60°C for 10~14h.

[0027] (2) Extract the reaction product with ethanol, freeze-dry to obtain catechol-chitosan polymer.

[0028] (3) Get an appropriate amount of pyrocatechol-chitosan polymer and be dissolved in the Tris-HCl buffer solution of 30 ~ 50ml pH=8.0, adopt three-electrode system, the conductive material to be modified is working electrode (anode), The platinum column electrode is the counter electrode (cathode), and the saturated cal...

Embodiment 2

[0033] (1) Weigh 1000mg amino-α, β, γ-cyclodextrin, 50mg paraformaldehyde, 1000mg catechol at room temperature, dissolve in 20ml 0.1 M hydrochloric acid solution, mix the three at 60℃ and stir for 10~14h .

[0034] (2) Extract the reaction product with ethanol, freeze-dry to obtain catechol-amino-α, β, γ-cyclodextrin polymer.

[0035] (3) Dissolve an appropriate amount of catechol-amino-α, β, γ-cyclodextrin polymer in 30~50ml of Tris-HCl buffer solution with pH=8.0, and use a three-electrode system. The material is a working electrode (anode), the platinum column electrode is a counter electrode (cathode), and a saturated calomel electrode is a reference electrode. In the electrolytic cell, an electrochemical reaction occurs at the anode, and the required reaction time of the present invention is 10 to 20min. The optimum voltage is 800-1200mv.

[0036] (4) Take out the above-mentioned modified conductive material, immerse it in deionized water for 10~15min, take it out and d...

Embodiment 3

[0040] (1) Weigh 1000mg of glycosaminoglycan, 50mg of paraformaldehyde, and 1000mg of catechol at room temperature, dissolve in 20ml of 0.1 M hydrochloric acid solution, mix the three and stir at 60°C for 10-14h.

[0041] (2) extracting the reaction product with ethanol, and freeze-drying to obtain a catechol-glycosaminoglycan polymer.

[0042](3) Take an appropriate amount of catechol-glycosaminoglycan polymer and dissolve it in 30~50ml of Tris-HCl buffer solution with pH=8.0, adopt a three-electrode system, and the conductive material to be modified is the working electrode (anode) , the platinum column electrode is the counter electrode (cathode), and the saturated calomel electrode is the reference electrode. In the electrolytic cell, the anode electrochemically reacts. The required reaction time of the present invention is 10 ~ 20min, and the optimum voltage of the reaction is 800-1200mv .

[0043] (4) Take out the above-mentioned modified conductive material, immerse it...

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Abstract

The invention provides a method for modifying the surface of a metal material by using a phenolic derivative amino polysaccharide polymer by virtue of an electrochemical method, belonging to the technical field of metal surface modification. The method comprises the following steps: preparing the phenolic derivative amino polysaccharide polymer by use of the Mannich method; by adopting a triple-electrode system, immersing the metal material to be modified in an appropriate alkaline buffer solution, and then carrying out an electrochemical reaction of an anode, namely the metal material in an electrolytic tank so that the metal material is electrochemically modified by a medium in the solution, thereby obtaining the modified metal material having excellent biocompatibility and antibacterial property. Compared with the traditional coating modification process having the defects such as long modification time, poor coating adhesion, uneven surface and the like, the method is mainly characterized in that the coating time can be greatly shortened, the obtained coating is evener and more compact and stronger in adhesion, and meanwhile, secondary modification, for example, sulfonation reaction and the like, can be carried out, so that the physical and chemical properties of the surface of the material can be improved.

Description

technical field [0001] The invention uses an electrochemical method to modify the surface of a metal material with a phenolic derivative-aminopolysaccharide polymer, and then uses an electrochemical method to improve the biocompatibility and antibacterial property of the metal material surface, belonging to the technical field of metal surface modification. Background technique [0002] The electrochemical method uses the electrode potential as the initiation and driving force of the polymerization reaction, so that the monomer is directly polymerized on the electrode surface to form a film. The electrochemical method is relatively simple, and it has some unique advantages: (1) polymerization and doping are carried out simultaneously; (2) a self-supporting conductive film can be formed on the electrode in one step; (3) it can be conveniently controlled separately by changing the polymerization potential The redox state of the membrane; (4) the thickness of the membrane can b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D9/02
Inventor 彭光佳陈斌陈捷黄烨王媛媛阎玉杨黎明金万芹
Owner SHANGHAI UNIV