Preparation method and application of sterilization material employing loofah sponge as matrix

A technology of loofah and matrix, applied in the direction of botanical equipment and methods, separation methods, chemical instruments and methods, etc., can solve the problems of limited, unstable nano-silver, easy agglomeration and adsorption of nano-silver, and achieve easy use and preparation The effect of simple method

Active Publication Date: 2017-07-07
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the improvement of living standards, the emphasis on water safety is also increasing. The use of nano-silver fungicides in tap water systems has been applied in some European countries, but conventional nano-silver is unstable, a natural, safe, non-toxic load Materials are needed. At present, bleaching powder is still used as the main fungicide for civil water in our country. The harm of residual chlorine after sterilization is widely recognized. Therefore, a safe, efficient, green, spectrum, and non-resistant fungicide urgently needs to be developed. Nano silver Fungicides meet al

Method used

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  • Preparation method and application of sterilization material employing loofah sponge as matrix
  • Preparation method and application of sterilization material employing loofah sponge as matrix
  • Preparation method and application of sterilization material employing loofah sponge as matrix

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1 Preparation of bactericidal material with loofah as matrix

[0018] Pre-preparation of nano-silver sol: Take a 100mL small beaker, add 100ml deionized water, add 0.6g chitosan into deionized water under stirring, add 0.2ml glacial acetic acid to help dissolve, and hydrolyze at room temperature for 6 hours. Take a 250mL three-neck bottle, add a magnet, insert a condenser tube, and a sodium hydroxide drying tube is installed on the condenser tube, add the above-mentioned dissolved chitosan solution, and heat in a water bath to 60°C. Dissolve 0.10g of silver nitrate in 50ml of deionized water to obtain a silver nitrate solution, and slowly add the prepared silver nitrate solution to the system dropwise. After the dropwise addition, raise the temperature to 80°C and react at a constant temperature for 12 hours to obtain a golden yellow nano-silver colloidal solution. spare. Ripe loofah fruit is peeled and pitted, washed and dried to obtain unmodified loofah. ...

Embodiment 2

[0019] Embodiment 2 Preparation of bactericidal material with loofah as matrix

[0020] The preparation conditions are basically the same as in Example 1, except that the following changes exist in the preparation conditions: instead of soaking the loofah in the nano-silver solution, the nano-silver sol is attached to the loofah by spraying. Other conditions are the same as Example 1.

Embodiment 3

[0021] Example 3 Preparation of bactericidal material based on loofah

[0022] The preparation conditions are basically the same as Example 1, and there are the following changes in the preparation conditions: the original ultrasonic condition of soaking the loofah in the nano-silver solution is changed to natural soaking in the dark for 6 hours, then it is taken out and controlled to dry, and then put into a 120 degree oven for drying . Other conditions are the same as Example 1.

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Abstract

The invention discloses a preparation method of a sterilization material employing loofah sponge as a matrix. The method comprises the steps of adding chitosan to deionized water under an intense stirring state, dropwise adding glacial acetic acid for assisting in dissolution, hydrolyzing at room temperature for 4-8h, heating in a water bath at 50-70 DEG C, slowly dropwise adding a silver nitrate solution and heating to 75-85 DEG C for constant-temperature reaction for 10-14h to obtain a gold nano silver colloidal solution; peeling and denucleating loofah fruits, cleaning and drying, soaking the loofah in sodium hydroxide and triethylamine, and repeatedly cleaning until the pH is 7 to obtain modified loofah sponge; and soaking the modified loofah sponge into the nano silver colloidal solution, carrying out ultrasonic absorption as an assistant means, drying and repeatedly cleaning until no silver is washed out, and drying again to obtain the sterilization material. According to the method, the strong adsorption effect of the loofah sponge on an organic matter is skillfully utilized and the nano silver material is uniformly deposited on the wall of a vascular bundle of the loofah sponge; the preparation method is simple and easy to operate; and the prepared product is of an overall material, is easy to use, store and popularize, and is safe and nontoxic.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and relates to a preparation method of an environment-friendly nano-silver loaded material. Background technique [0002] With the improvement of living standards, the emphasis on water safety is also increasing. The use of nano-silver fungicides in tap water systems has been applied in some European countries, but conventional nano-silver is unstable, a natural, safe, non-toxic load Materials are needed. At present, bleaching powder is still used as the main fungicide for civil water in my country. The harm of residual chlorine after sterilization is widely recognized. Therefore, a safe, efficient, green, spectrum, and non-resistant fungicide urgently needs to be developed. Nano silver Fungicides meet all the above requirements, but as we all know, nano-silver is easy to agglomerate due to its large specific surface area in the natural state, so there are many related r...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01P1/00C02F1/28C02F1/50B01D53/02
CPCA01N59/16B01D53/02B01D2257/91C02F1/28C02F1/50
Inventor 王宁王惠姚光源魏清章甦其他发明人请求不公开姓名
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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