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Method and device for preparing nano silver- and porous structure-containing medical high molecular material

A technology of polymer materials and porous structures, applied in the direction of catheters, coatings, etc.

Inactive Publication Date: 2011-04-13
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the method of doping and mixing can easily cause the agglomeration of nano-silver, and then lose its special nano-scale antibacterial effect.
At the same time, the applicability of this method is not high, and it is not independent, it requires high equipment, and it may also change the mechanical properties of polymer materials, etc.

Method used

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  • Method and device for preparing nano silver- and porous structure-containing medical high molecular material
  • Method and device for preparing nano silver- and porous structure-containing medical high molecular material

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Dissolve 1 g of medical polyurethane masterbatch in 50 ml of tetrahydrofuran. Add 0.1 g of silver nitrate, and add 1 ml (0.001 g / m1) of sodium borohydride ethanol solution under vigorous stirring to prepare a nano-silver / polymer composite solution for use.

[0042] Select commercially available ordinary PVC conduits, wash and dry them, immerse them in the composite solution for 30 seconds, take them out, and place them in a constant temperature and humidity reactor with a humidity of 90% at 25°C to naturally volatilize to form a film for about 5-10 minutes. The nano-silver / polymer honeycomb structure-coated antibacterial catheter was prepared. The average thickness of the coating was 50 μm, the average pore size of the honeycomb structure was about 5 μm, and the silver content was 10%.

Embodiment 2

[0044] Dissolve 1 g of medical polyurethane masterbatch in 50 ml of tetrahydrofuran. Add 0.1 g of silver nitrate, and add 1 ml (0.001 g / m1) of sodium borohydride ethanol solution under vigorous stirring to prepare a nano-silver / polymer composite solution for use.

[0045] Select a commercially available common polyurethane catheter, after washing and drying, immerse in the composite solution for 30 seconds, take it out, and in a constant temperature and humidity reactor, with a humidity of 60%, at 25°C, naturally volatilize to form a film, about 5-10 minutes, The nano-silver / polymer honeycomb structure-coated antibacterial catheter was prepared. The average thickness of the coating was 50 μm, the average pore size of the honeycomb structure was about 3 μm, and the silver content was 10%.

Embodiment 3

[0047] Dissolve 1 g of medical polyurethane masterbatch in 50 ml of tetrahydrofuran. Add 0.1 g of silver nitrate, and add 1 ml (0.001 g / m1) of sodium borohydride ethanol solution under vigorous stirring to prepare a nano-silver / polymer composite solution for use.

[0048] Select a commercially available ordinary polyurethane catheter, wash and dry it, immerse it in the composite solution for 30 seconds, take it out, and naturally volatilize and form a film in a constant temperature and humidity reactor with a humidity of 90% at 40°C for about 5-10 minutes. The nano-silver / polymer honeycomb structure-coated antibacterial catheter was prepared. The average thickness of the coating was 50 μm, the average pore size of the honeycomb structure was about 3 μm, and the silver content was 10%.

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Abstract

The invention relates to the technical field of medical appliance, in particular to a surface antibacterial treatment method and a device thereof for preparing a nano silver- and porous structure-containing medical high molecular material. The biggest problem of the implantation-type or insertion-type medical high molecular material in the clinical application is the infection which is caused by a biological film formed by the adherence of bacteria on the surface. A nano silver / polymer honeycomb structure-containing film can be processed and formed on the surface of the medical high molecular material through a water auxiliary method so as to realize the double antibacterial purposes of nano silver antibacterium and honeycomb structure antibacterial adsorption. The method has simple process, low requirement on equipment and strong universality, and is an economical, convenient and highly controlled antibacterial surface treatment method.

Description

Technical field [0001] The present invention involves a medical polymer material surface antibacterial treatment method and their preparation devices containing nano -silver and porous structures. Through the water assistance method, nano -silver / polymer composite materials are achieved under a certain temperature and humidity.The surface of the material forms nano -silver / polymer honeycomb structure antibacterial film layer.It belongs to the field of medical device technology. [0002] Background technique [0003] Medical polymer materials are extremely widely used in clinical practice. The most important aspects of use is medical catheter.With the development of new diagnostic technologies and treatment methods, the application of medical catheter is becoming more and more widely used.This is the most difficult and most common problem.It is now known that bacteria can form a biofilm on the surface of human tissue such as teeth, gums, skin, lungs, urethra, and other organs, cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J9/28C08L67/04C08L75/04C08L27/06C08L25/06C08K3/28A61L29/12A61L29/16A61L29/14
Inventor 顾宁江筱莉周昱薇王醒张天柱
Owner SOUTHEAST UNIV
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