Nano silver disinfectant

A nano-silver and disinfectant technology, applied in the field of biomedicine, can solve the problem that nano-silver cannot be sterilized quickly

Inactive Publication Date: 2009-07-22
RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the embodiments of the present invention is to provide a nano-silver disinf

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation of nano silver:

[0023] (1) 0.5% betaine polymer and 47% tap water are mixed to be betaine polymer aqueous solution, then 0.5% hydrogen peroxide is mixed with 50% tap water to be hydrogen peroxide aqueous solution. (2) Add the betaine polymer aqueous solution into the reaction kettle, add 2% silver nitrate at a stirring speed of 800r / min in a high-speed disperser, and stir for about 1.5 hours to make the silver ion and the betaine polymer solution fully A complex reaction occurs. (3) Finally, the aqueous hydrogen peroxide solution is sprayed in the solution obtained in step (2) through the sprayer and under the flow control of 1000ml per minute. After the spraying is completed, continue to stir for 1 hour to obtain liquid nano silver.

[0024] 2. Preparation of active ingredients:

[0025] Weigh 100g Houttuynia cordata, place in a round bottom beaker, add 1000ml of 50% ethanol, and extract under reflux at 60°C for 60 minutes. After repeated extractio...

Embodiment 2

[0029] 1. Preparation of nano-silver solution:

[0030] Same as the preparation method of the nano-silver solution in Example 1.

[0031] 2. Preparation of active ingredients: take 600g of fresh Houttuynia cordata, cut it into a length of about 0.5-1.0cm, put it in a 1500ml round bottom flask, add 800ml of distilled water, connect it to a volatile oil extractor for reflux extraction, boil the mixed solution and Timing at the beginning of reflux, keeping a steady reflux temperature for extraction for 3 hours, stopping heating, cooling naturally, collecting light (light) yellow volatile oil, and storing it in a refrigerator. Weigh 100g of dried cnidium into a 1000ml round bottom flask, add 450mL of distilled water to soak for 14h, connect to a volatile oil extractor for reflux extraction, time when the mixture boils and reflux begins, keep a steady reflux temperature for extraction for 6h, and stop heating. The effluent was dried with anhydrous sodium sulfate to obtain a light ...

Embodiment 3

[0035] 1. Preparation of nano-silver solution:

[0036] Same as the preparation method of the nano-silver solution in Example 1.

[0037] 2. Preparation of active ingredients: buy commercially available borneol β-elemene extract and oxymatrine extract.

[0038] 3. Preparation of nano-silver disinfectant:

[0039] Get above-mentioned borneol β-elemene extract 0.2ml, oxymatrine extract 0.2g, add surfactant sodium lauryl sulfate 0.2g, Tween-800.3ml, distilled water 20ml, after stirring for 0.5 hours, in Slowly add 20 ml of the above-prepared nano-silver solution dropwise during stirring, add distilled water to make the volume to 100 ml, and stir thoroughly for 0.5 hour to prepare a nano-silver composite solution with a nano-silver content of 400 ppm.

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Abstract

The invention provides a nanometer silver disinfectant, which contains nanometer silver and an additive, wherein the additive consists of a surfactant and an active component; the surfactant consists of one or more of tween 80, tween 20, sodium dodecyl sulfate, coconut oil fatty acid monoethanolamine, and coconut oil midopropyl betaine; and the active component consists of one or more of houttuynia cordata thunb volatile oil, mint volatile oil, borneol, rhizoma atractylodis volatile oil, radix sophorae flavescentis total alkaloid, and cnidium fruit volatile oil. Through synergic actions, the nanometer silver and the additive in the nanometer silver disinfectant can greatly increase the speed of the nanometer silver to enter the microorganism cytoplasm while the nanometer silver is ensured to be safe and nontoxic so as to achieve the function of fast sterilization by the nanometer silver; besides, the nanometer silver disinfectant can be applied to keeping the long term killing effect on microorganisms.

Description

technical field [0001] The invention belongs to the technical field of biomedicine, and in particular relates to a nano-silver disinfectant. Background technique [0002] Nano Silver (Nano Silver) is the metal silver whose particle size is nanoscale. As the latest generation of natural antibacterial agent, nano silver sterilization has the characteristics of broad-spectrum antibacterial, safe and non-toxic. [0003] The broad-spectrum antibacterial mechanism of nano-silver may be related to the combination of nano-silver with protein and nucleic acid. Nano-silver particles can combine with sulfhydryl-containing metabolic enzymes after entering the bacteria, leading to the death of bacteria and fungi; nano-silver may also combine with the DNA of bacteria and fungi, resulting in structural changes, inhibiting DNA replication, and causing fungi to lose their activity. Research by eight authoritative institutions in China has found that it has comprehensive antibacterial activ...

Claims

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Application Information

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IPC IPC(8): A01N59/00A01N35/02A01N65/10A01N65/08A01N43/90A01N27/00A01N31/06A01N31/04A01N25/30A01P1/00
Inventor 曾嘉明裴渭静李荣先王乃利
Owner RESEARCH INSTITUTE OF TSINGHUA UNIVERSITY IN SHENZHEN
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