Nano silver / dextran gel hybridization material, and preparation and use thereof

A technology of glucan gel and hybrid material, applied in the field of functional polymer materials, can solve problems such as limiting the use range of materials and non-biodegradation, and achieve the effects of preventing silver particles from agglomerating, preventing agglomeration, and broadening the scope of application

Inactive Publication Date: 2009-04-15
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the gel matrix in most nano-silver/gel hybrid materials is artificially synthesized polymers, such as polyacrylamide, which cannot be biodegraded; and toxic reducing agents or organic

Method used

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  • Nano silver / dextran gel hybridization material, and preparation and use thereof
  • Nano silver / dextran gel hybridization material, and preparation and use thereof
  • Nano silver / dextran gel hybridization material, and preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The present invention prepares the whole process of nano-silver / dextran gel hybrid material as follows figure 1 shown.

[0033] (1) Preparation of Sephadex (Dex)

[0034] Weigh 2.268g dextran (M W =40,000) into a beaker, add 10mL of 2.8mol·L -1 NaOH solution, the molar ratio of dextran and NaOH is 1: 2, stir, dextran is completely dissolved, add the cross-linking agent MBA of 400mg respectively (the mass ratio of MBA and dextran is 1: 5.7) , Stir to keep the MBA powder uniformly suspended and dispersed in the above reaction system, stir slowly at room temperature (25°C) (stirring speed is 100 rpm) until it becomes viscous (about 3h), stop stirring, 30°C Leave it under for 6 hours to make it fully cross-linked. Wash 5 times with a large amount of water to remove NaOH and unreacted MBA in the gel to obtain a dextran gel (Dex), cut the obtained gel into blocks and set aside.

[0035] (2) Preparation of nano-silver / dextran gel (Dex-Ag) hybrid material MBA400-6h

[0036...

Embodiment 2

[0038] (1) Preparation of Sephadex (Dex)

[0039] Weigh 2.268g dextran (M W =40,000) into a beaker, add 10mL of 2.8mol·L -1 NaOH solution, the molar ratio of dextran and NaOH is 1: 2, stir, glucan is completely dissolved, add the cross-linking agent MBA of 350mg respectively (the mass ratio of MBA and dextran is 1: 6.5) , Stir to keep the MBA powder uniformly suspended and dispersed in the above reaction system, stir slowly at room temperature (25°C) (stirring speed is 100 rpm) until it becomes viscous (about 3h), stop stirring, 25°C Leave it under for 6 hours to make it fully cross-linked. Wash 5 times with a large amount of water to remove NaOH and unreacted MBA in the gel to obtain a dextran gel (Dex), cut the obtained gel into blocks and set aside.

[0040] (2) Preparation of nano-silver / dextran gel hybrid material MBA350-6h

[0041] Take 0.1g of Dex into 30ml 5mmol·L -1 AgNO 3 In the solution, after being placed at 30°C for one day, the / dextran gel changed from col...

Embodiment 3

[0043] (1) Preparation of Sephadex (Dex)

[0044] Weigh 2.268g dextran (M W =40,000) into a beaker, add 10mL of 2.8mol·L -1 NaOH solution, the molar ratio of glucan and NaOH is 1: 2, stir, dextran is completely dissolved, add the cross-linking agent MBA of 300mg respectively (the mass ratio of MBA and dextran is 1: 7.6) , Stir to keep the MBA powder uniformly suspended and dispersed in the above reaction system, stir slowly at room temperature (25°C) (stirring speed is 100 rpm) until it becomes viscous (about 3h), stop stirring, 35°C Leave it under for 6 hours to make it fully cross-linked. Wash 5 times with a large amount of water to remove NaOH and unreacted MBA in the gel to obtain a dextran gel (Dex), cut the obtained gel into blocks and set aside.

[0045] (2) Preparation of nano-silver / dextran gel hybrid material MBA300-6h

[0046] Take 0.1g of Dex into 30ml 5mmol·L -1 AgNO 3 In the solution, after being placed at 30°C for one day, the dextran gel changed from colo...

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Abstract

The invention discloses a nano-silver/sephadex hybrid material and a preparation method as well as applications in antisepsis thereof. In the method, the sephadex is firstly prepared in NaOH aqueous solution, and no reducing agent is added at room temperature and the nano-silver/sephadex hybrid material is prepared in situ by deoxidizing silver ions through dextran. The particle size of the nano-silver in the hybrid material is about 20 to 30 nanos and the particles are uniformly distributed. The nano-silver/sephadex hybrid material has very good antibacterial action to bacillus and wide application prospect in antibacterial materials.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and in particular relates to an antibacterial gel hybrid material, that is, a nano-silver / dextran gel hybrid material, a preparation method thereof, and an antibacterial application. Background technique [0002] With the improvement of living standards, people pay more and more attention to healthy and safe lifestyles. Studies have shown that many articles that people frequently touch in daily life contain a large number of bacteria, which directly threaten people's health. Therefore, the research and development of high-efficiency non-(low) toxicity antibacterial materials is a topic with both social and economic significance. Nano silver, due to the surface effect, its antibacterial ability is more than 10 times that of micron-sized silver particles, and its antibacterial performance is also far greater than traditional silver ion fungicides (such as silver nitrate and silver sulfa...

Claims

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Application Information

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IPC IPC(8): C08J3/205C08L5/02C08K3/08C08J3/24A01N59/16A01P1/00
Inventor 马玉倩潘玉萍易菊珍
Owner SUN YAT SEN UNIV
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