Preparation method of nano-grade layered silver-carrying-amino acid complex antibacterial agent
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A nano-layered, amino acid technology, applied in botany equipment and methods, animal repellants, plant growth regulators, etc., can solve the problems of low silver loading, slow release performance, poor salt tolerance, and easy discoloration, etc. Achieve good anti-discoloration performance, antibacterial activity improvement, high stability effect
Inactive Publication Date: 2013-12-18
XIAN UNVERSITY OF ARTS & SCI
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Problems solved by technology
[0005] The purpose of the present invention is to overcome the defect that exists in the prior art, provide a kind of preparation method of nano-layered silver-amino acid complex antibacterial agent, solve the easy discoloration, slow release performance and salt tolerance of existing silver ion antibacterial agent Technical problems such as poor performance and low silver loading
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Embodiment 1
[0027] Embodiment 1: A kind of preparation method of nano-layered silver-loaded amino acid antibacterial agent
[0028] Add 9.6mL each of 250mM silver nitrate and 250mM histidine solution into a 100mL beaker, add 80.8mL deionized water, the total volume of the solution is 100mL, mix well, place at room temperature for 30min, stir in a water bath at 50°C for 15min, and the stirring speed is 800r / min, add 1.0 g of high-purity montmorillonite, stir evenly, seal, place in a 50°C water bath and continue stirring overnight, cool, and centrifuge, and dry the precipitate in a 60°C drying oven.
Embodiment 2
[0029] Embodiment 2: A kind of preparation method of nano-layered silver-loaded amino acid antibacterial agent
[0030] Add 9.6mL each of 250mM silver nitrate and 250mM histidine solution into a 100mL beaker, add 80.8mL deionized water, the total volume of the solution is 100mL, mix well, place at room temperature for 30min, stir in a water bath at 50°C for 15min, and the stirring speed is 800r / min, add 1.0 g of high-purity montmorillonite, stir evenly, seal, place in a 50°C water bath and continue stirring overnight, cool, and centrifuge, and dry the precipitate in a 70°C drying oven.
Embodiment 3
[0031] Embodiment 3: A kind of preparation method of nano-layered silver-loaded amino acid antibacterial agent
[0032] Add 9.6mL each of 250mM silver nitrate and 250mM histidine solution into a 100mL beaker, add 80.8mL deionized water, the total volume of the solution is 100mL, mix well, place at room temperature for 30min, stir in a water bath at 50°C for 15min, and the stirring speed is 800r / min, add 1.0 g of high-purity montmorillonite, stir evenly, seal, place in a water bath at 50°C and continue stirring overnight, cool and centrifuge, and dry the precipitate at room temperature.
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Abstract
The invention discloses a preparation method of a nano-grade layered silver-carrying-amino acid complex antibacterial agent. The method comprises the steps that: (1) silver salt, amino acid, and water are mixed according to a molar ratio of 1:1:2.7; the mixture is stirred for 30min under room temperature, and is stirred for 15min in a water bath with a temperature of 50 DEG C, wherein a stirring speed is 800r / min, such that a solution is prepared; (2) under a condition with a 50 DEG C water bath and a stirring speed of 800r / min, montmorillonite is added to the solution, and the mixture is stirred overnight under a hydro-thermal condition with a temperature of 50 DEG C, such that a material liquid is obtained; (3) solid-liquid separation is carried out; an obtained solid is dried under room temperature, such that a finished product antibacterial agent powder is obtained. The nano-grade layered silver-carrying-amino acid complex antibacterial agent is milk-white fluffy powder with excellent anti-tarnishing performance. With the method, the releasing-retardance and salt resistance of the antibacterial agent are improved. The antibacterial agent has a silver load of 18%. The antibacterial activity of the antibacterial agent is greatly improved. The method is suitable to be used in the technical field of chemical functional materials.
Description
technical field [0001] The invention belongs to the technical field of chemical functional materials, and relates to a preparation method of a silver ion inorganic antibacterial agent, in particular to a preparation method of a nano-layered silver-amino acid complex antibacterial agent. Background technique [0002] With the continuous improvement of people's living standards, people pay more and more attention to the comfort and hygiene conditions of the living environment, and have higher requirements for the antibacterial properties of durable consumer goods such as sanitary products, daily necessities, water treatment devices, food packaging, and clothing. , so various antibacterial products have emerged as the times require and have been developed rapidly. The market demand and development potential of antibacterial materials are huge. Antibacterial agents are a class of functional materials that can kill or inhibit harmful microorganisms such as bacteria and viruses, a...
Claims
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Application Information
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