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Kernel-shell structured rare-earth nanometer antibiotic agent, prepn. method and application thereof

A nanometer antibacterial agent and a core-shell structure technology, which is applied in the field of rare earth nanometer antibacterial agents and their preparation, can solve the problems that the antibacterial properties of antibacterial materials cannot be fully exerted, the affinity between antibacterial agents and base materials is poor, and the optical properties cannot be widely applied. Achieve the effect of improving electronic and energy level structure characteristics, increasing contact surface area, and high yield

Inactive Publication Date: 2007-07-18
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a rare earth nano-antibacterial agent with core-shell structure and its preparation method and application, to overcome the lack of special structural design of existing antibacterial agents, the antibacterial properties of antibacterial materials can not be fully brought into play, and the antibacterial agent Poor affinity with base materials, physical properties, mechanical properties, and optical properties of antibacterial materials are not widely applicable due to their particle size and structure

Method used

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  • Kernel-shell structured rare-earth nanometer antibiotic agent, prepn. method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Mix 10g of cetyltrimethylammonium bromide and 200g of water at 80°C and stir evenly, then add 37ml of concentrated ammonia water, continue to stir, adjust the pH value within the range of 8-13, and then add it dropwise at an appropriate speed 5ml of tetraethyl orthosilicate, when the solution becomes turbid, stop the dropwise addition, drop the remaining 6ml of tetraethylorthosilicate at an appropriate speed after about half an hour, continue the reaction for 2-8 hours, and age at room temperature overnight , centrifuged, vacuum-dried at 40-80°C for 4-18 hours, and then calcined at 550°C for 5 hours to obtain carrier spherical mesoporous silica with a particle size of 50-100nm and a white powder with a specific surface area of 600-1500m 2 / g, the pore size is 2.0-5.0nm.

[0034] Lanthanum chloride and imidazole are fed in a molar ratio of 1:6, add a certain amount of absolute ethanol, stir at 40-80°C, adjust the pH value between 6-8, and continue stirring for about 5-8 ...

Embodiment 2

[0037] Mix 4g of water, 12ml of concentrated ammonia water and 65ml of absolute ethanol in a certain proportion, heat and stir in a water bath at 50-100°C, and then add 6ml of tetraethyl orthosilicate dropwise at an appropriate speed. When the solution becomes cloudy, stop the dropwise addition After about half an hour, add the remaining 7ml tetraethyl orthosilicate dropwise at an appropriate speed. After the dropwise addition, continue the reaction for 2-8 hours, age at room temperature overnight, separate by centrifugation, and dry in vacuum at 40-80°C for 4-18 hours , to obtain carrier spherical silica, the particle size is between 50-100nm, and it is white powder.

[0038] Feed cerium chloride and imidazole at a molar ratio of 1:6, add 50ml of absolute ethanol, stir at 40-80°C, adjust the pH value between 6-8, continue stirring for about 5-8 hours, and depressurize Distill, wash thoroughly with ether and water, and dry under vacuum at 40-80°C for 4-10 hours to obtain the b...

Embodiment 3

[0041] Mix 5.8g of cetyltrimethylammonium chloride and 186g of water at 80°C and stir evenly, then add 0.3 mole of sodium hydroxide, continue to stir, adjust the pH value to be in the range of 8-13, and then use appropriate Add 2.4ml of tetraethyl orthosilicate dropwise at a high speed. When the solution becomes turbid, stop the dropwise addition. After about half an hour, add the remaining 3ml of tetraethyl orthosilicate dropwise at an appropriate speed. After the addition is complete, continue the reaction for 2-8 hours. Aging at room temperature overnight, centrifugal separation, vacuum drying at 40-80°C for 4-10 hours, and then roasting at 550°C for 5 hours to obtain carrier spherical mesoporous silica with a particle size between 50-100nm and a white powder , the specific surface area is 600-1500m 2 / g, the pore size is 2.0-5.0nm.

[0042] Feed neodymium chloride and imidazole at a molar ratio of 1:6, add 60ml of absolute ethanol, stir at 40-80°C, adjust the pH value bet...

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Abstract

A nano-class RE antibacterial agent with core-shell structure for plastics, paine and ceramics is prepared from binary RE-heterocyclic compound match composed of RE ions chosen from La, Ce, Pr, Nd, Sm, Er, Eu, Y, Dy and Gd and the heterocyclic compound (imidazole or benzimidazole), and the carrier chosen from spherical SiO2 or spherical meta-porous SiO2. Its preparing process is also disclosed.

Description

technical field [0001] The invention belongs to the technical field of rare earth nanometer materials and the field of environmental purification, and in particular relates to a rare earth nanometer antibacterial agent and its preparation method and application. Background technique [0002] With the growth of human material wealth and the overall progress of society, people are more and more concerned about environmental issues, and the negative impact caused by the environment on human health and quality of life has received special attention. Therefore, it has gradually become the consensus of society to reduce and effectively prevent the impact and harm of bacteria in human settlements on human life, and to reduce the adverse consequences of bacterial infection, poisoning and disease caused by them, and people's demand for antibacterial materials is increasingly strong. [0003] General antibacterial materials can be divided into three parts according to the composition:...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/08A01P1/00A01N43/50
Inventor 何其庄周美锋张静娟郁慧庄暻
Owner SHANGHAI NORMAL UNIVERSITY
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