Silver/N,N-dimethylaniline modified nano silicon dioxide antibacterial material and preparation method thereof

A technology of nano-silica and dimethylaniline, applied in the field of nano-materials, can solve the problems of reduced antibacterial effect, high surface potential energy, and easy aggregation of nano-silver antibacterial materials, so as to prevent agglomeration and improve antibacterial effect

Inactive Publication Date: 2014-07-09
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high surface potential energy of nano-materials, nano-silver antibacterial materials are easy to agglomerate, thereby reducing the antibacterial effect.

Method used

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  • Silver/N,N-dimethylaniline modified nano silicon dioxide antibacterial material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Preparation of modified silica: Mix 120 μL of mercaptopropylmethyldimethoxysilane and 150 μL of 35% NH 4 OH was added to the ethanol solution in which 200mg of silicon dioxide was dissolved, the solution was stirred at room temperature for 20 hours, then centrifuged and washed, and dried in an oven at 25°C for 5 hours;

[0028] (2) Dissolve 100 mg of the above-mentioned modified silica in ethanol solution, disperse ultrasonically for 20 minutes and heat to 60°C, then add 62 mg of silver nitrate solution and stir for 4 hours;

[0029] (3) Add 15.6 mg of N,N-dimethylaniline into the solution of (2), stir for 12 hours, centrifuge, wash and dry to obtain silver / N,N-dimethylaniline modified nano-silica antibacterial material.

[0030]

Embodiment 2

[0032] (1) Preparation of modified silica: mix 140 μL of mercaptopropylmethyldimethoxysilane and 120 μL of 45% NH 4 OH was added to the ethanol solution in which 200mg of silicon dioxide was dissolved, the solution was stirred at room temperature for 10 hours, then centrifuged and washed, and dried in an oven at 28°C for 8 hours;

[0033] (2) Dissolve 100 mg of the above-mentioned modified silicon dioxide in ethanol solution, disperse ultrasonically for 15 minutes and heat to 50°C, then add 50 mg of silver nitrate solution and stir for 3 hours;

[0034] (3) Add 14.2 mg of N,N-dimethylaniline, stir for 18 hours, centrifuge, wash and dry to obtain the silver / N,N-dimethylaniline modified nano-silica antibacterial material.

[0035]

Embodiment 3

[0037] (1) Preparation of modified silica: Mix 100 μL of mercaptopropylmethyldimethoxysilane and 100 μL of 20% NH 4 OH was added to the ethanol solution in which 200mg of silicon dioxide was dissolved, the solution was stirred at room temperature for 10 hours, then centrifuged and washed, and dried in an oven at 20°C for 10 hours;

[0038] (2) Dissolve 100 mg of the above-mentioned modified silicon dioxide in an ethanol solution, ultrasonically disperse for 10 minutes, heat to 40°C, add 34 mg of silver nitrate solution, and stir for 2 hours;

[0039] (3) Add 12.1 mg of N,N-dimethylaniline, stir for 10 hours, centrifuge, wash and dry to obtain the silver / N,N-dimethylaniline modified nano-silica antibacterial material.

[0040]

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Abstract

The invention provides a silver/N,N-dimethylaniline modified nano silicon dioxide antibacterial material and a preparation method thereof. The silver/N,N-dimethylaniline modified nano silicon dioxide antibacterial material is prepared from the following components in parts by weight: 100 parts of modified silicon dioxide, 34-100 parts of silver nitrate and 12.1-21.78 parts of N,N-dimethylaniline, wherein the modified silicon dioxide is obtained by carrying out surface treatment on silicon dioxide by a 3-Mercaptopropylmethyldimethoxysilane solution and ammonia water. According to the silver/N,N-dimethylaniline modified nano silicon dioxide antibacterial material, nano silicon dioxide is used as a base body and is modified by the silver/N,N-dimethylaniline so as to effectively prevent nano silver from being clustered; the N,N-dimethylaniline has a synergic antibacterial effect so that the antibacterial effect of the material is improved.

Description

[0001] technical field [0002] The invention belongs to the technical field of nanometer materials, and in particular relates to a silver / N,N-dimethylaniline modified nano-silica antibacterial material and a preparation method thereof. [0003] Background technique [0004] The safe and effective antibacterial properties of medical materials have attracted more and more attention from researchers, among which silver ion materials and anion salt materials are well known due to their spectral antibacterial effects. In recent years, with the development of nanotechnology, research on nano silver ion antibacterial materials has gradually deepened. However, due to the high surface potential energy of nanomaterials, nano silver antibacterial materials are easy to agglomerate, thereby reducing the antibacterial effect. However, due to the tertiary amine groups on its molecular structure, N,N-dimethylaniline will protonate under solution conditions to generate cations, and react ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N25/08A01P1/00A01P3/00A01N33/06
Inventor 杨桂生计娉婷
Owner HEFEI GENIUS NEW MATERIALS
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