CN1274595C - Process for preparing silicon gel carrying silver ion - Google Patents

Abstract

The present invention relates to a method for preparing silver ion-loaded silica gel, in particular to a method for preparing silver ion-loaded silica gel for antibacterial use. The method includes the following reaction steps: 1). Silver nitrate solid is added to deionized water for dissolution , prepared into silver nitrate solution; 2). Add surfactant to silver nitrate solution; 3). Add silica sol to the solution; 4). Add surfactant to obtain silver ion-loaded silica gel. The silver-ion-loaded silica gel prepared by the method has high conversion rate, simple process, low cost, short production cycle and mass production; the product can be widely used in antibacterial materials.

Description

A kind of preparation method of silver ion-loaded silica gel

technical field

The invention relates to a preparation method of silver ion-loaded silica gel, in particular to a preparation method of silver ion-loaded silica gel for antibacterial use.

Background technique

With the improvement of people's living standards, long-lasting sterile requirements are put forward for clothing, food, housing, daily household appliances and living environment. As a new type of antibacterial material, silver-loaded materials have many advantages such as broad-spectrum, durability, and safety, so the application fields continue to expand. . Inorganic antibacterial materials have broad market prospects. The composition of the inorganic antibacterial agent mainly includes a carrier and an antibacterial component. The carrier supports the antibacterial component to ensure the stability of the active component and has slow-release properties. The antibacterial ingredients are mainly some metal ions, such as silver, copper, zinc, etc. or nano-metal powders. Mercury, cadmium, and lead have antibacterial properties, but are harmful to the human body; copper, nickel, and cobalt ions are colored, which will affect the appearance of the product; Zinc has certain antibacterial properties, but its antibacterial strength is only 1/1000 of that of silver ions. Silver ion antibacterial agents occupy a dominant position in inorganic antibacterial agents, and the vast majority of commercial products on the market are also silver ion-loaded inorganic antibacterial bactericides. . Silver ion-loaded silica gel is a silver-loaded antibacterial product with excellent performance and can be widely used as an antibacterial agent. Silver ion-loaded silica gel has a wide range of applications, such as fibers, plastics, coatings, textiles, ceramics, etc. Its products, such as various antibacterial fiber products, plastic products, ceramic products, bedding, etc., are favored by people. Scope of application: Ceramics, chemical fibers, daily necessities, plastic products, household appliances, sporting goods, medical and sanitary products, coatings, water treatment, construction and civil engineering, etc.

Chinese patent CN1146442 discloses a preparation of silver/silicon dioxide mesoporous composite. The mesoporous silica was first prepared by sol-gel method, then soaked in silver nitrate solution, and then dried and heat-treated to obtain a light yellow silver/silica mesoporous composite for molecular-level electronic components.

Chinese patent application CN1263709 discloses a silver ion disinfectant and its manufacturing method and disinfection device. Wherein the manufacture method of the silver ion disinfectant is as follows: silver ion-containing inorganic compound 50-60%, water glass 39.9-49.5%, calcium sulfate 0.1-0.5%, adding appropriate amount of water to form a ball, drying in a carbon dioxide atmosphere, drying After that, it is put into a saturated sodium chloride aqueous solution and passed through carbon dioxide for 8-12 hours to carry out a chemical reaction to form a compound. It can also be mixed with saturated silver nitrate solution and the newly formed silicic acid after the reaction of water glass and hydrochloric acid, then add milk of lime, stir, filter and dry, then add 10-20% silver chloride powder and press it with artificial glue.

Chinese patent application CN1466554 discloses a method for manufacturing borosilicate glass with high silver content, which is to add silver ions during the melting process.

Contents of the invention

The object of the present invention is to provide a preparation method of silver ion-loaded silica gel, the silver ion-loaded silica gel prepared by the method has high conversion rate, simple process, low cost, short production cycle and mass production.

Technical scheme of the present invention is:

A preparation method for silver ion-loaded silica gel, characterized in that the method comprises the following reaction steps:

1). Add silver nitrate solid to deionized water for dissolving to prepare silver nitrate solution;

2). Add surfactant to silver nitrate solution;

3). Adding silica sol to the solution;

4). Add surfactant to obtain silver ion-loaded silica gel.

Surfactants suitable for the present invention include, but are not limited to, the following: anionic surfactants, cationic surfactants, or amphoteric surfactants.

Anionic surfactants suitable for the present invention may be sodium lauryl sulfate, sodium dodecylsulfonate or sodium dodecylbenzenesulfonate.

A cationic surfactant suitable for the present invention may be cetyltrimethylammonium bromide or stearyltrimethylammonium chloride.

Amphoteric surfactants suitable for the present invention may be polyoxyethylene sorbitan monooleate or lauryl dimethyl betaine.

The silver-ion-loaded silica gel prepared by the invention has high conversion rate, simple process, low cost, short production cycle and mass production.

Detailed ways

The present invention will be further described below by embodiment.

Example 1

9.45 grams of silver nitrate solids are added to dissolve at room temperature in 49.3 liters of deionized water, and are prepared into silver nitrate solution; 27.5 milliliters of 10% (wt %) anionic surfactant sodium lauryl sulfate aqueous solution are added in the silver nitrate solution, Stir evenly, then add 500 milliliters of silica sol aqueous solution containing 30% (wt%) of silicon dioxide under stirring, after stirring uniformly, add 10% (wt%) cationic surfactant cetyltrimethylammonium bromide aqueous solution 250 milliliters to generate silver ion-loaded silica gel, then let it stand for sedimentation, remove the upper clear night, then wash the gel with deionized water until the residual nitrate ion meets the product requirements, dry the precipitate, and then pulverize it to obtain silver ion Silicone gel powder.

Example 2

9.45 grams of silver nitrate solids are added to 49.3 liters of deionized water and dissolved at room temperature to prepare a silver nitrate solution; In the silver solution, stir evenly, then add 500 milliliters of silica sol aqueous solution containing silicon dioxide 30% (wt%) under stirring, after stirring evenly, add 10% (wt%) anionic surfactant sodium lauryl sulfate aqueous solution 27.5 ml to produce silver ion-loaded silica gel, then let it settle, remove the upper clear night, and then wash the gel with deionized water until the residual nitrate ion meets the product requirements, add the precipitate to deionized water to disperse into a uniform Silica gel suspensions loaded with silver ions.

Example 3

9.45 grams of silver nitrate solids are added to 49.3 liters of deionized water and dissolved at room temperature to prepare a silver nitrate solution; In the silver solution, stir evenly, then add 500 milliliters of silica sol aqueous solution containing silicon dioxide 30% (wt%) under stirring, after stirring evenly, add 10% (wt%) anionic surfactant sodium dodecylsulfonate 25.5 milliliters of aqueous solution generates silver ion-loaded silica gel, and then washes the gel with deionized water until the residual nitrate ions meet the product requirements, and the precipitate is added to deionized water to disperse into a uniform silver ion-loaded silica gel suspension .

Example 4

9.45 grams of silver nitrate solids are added to 49.3 liters of deionized water and dissolved at room temperature to prepare a silver nitrate solution; 25.5 milliliters of 10% (wt %) anionic surfactant sodium dodecylsulfonate aqueous solution are added in the silver nitrate solution , stir evenly, then add 500 milliliters of silica sol aqueous solution containing silicon dioxide 30% (wt%) under stirring, after stirring uniformly, add 10% (wt%) cationic surfactant octadecyltrimethylammonium chloride 230 milliliters of the aqueous solution generates silver ion-loaded silica gel, and then centrifuges and dehydrates, washes the filter cake with deionized water, then dries the filter cake, and then pulverizes to obtain the silver ion-loaded silica gel powder.

Example 5

9.45 grams of silver nitrate solids were added to 49.3 liters of deionized water and dissolved at room temperature to prepare a silver nitrate solution; 32.5 milliliters of 10% (wt %) polyoxyethylene sorbitan monooleate aqueous solution was added to the silver nitrate solution , stir evenly, then add 500 milliliters of silica sol aqueous solution containing silicon dioxide 30% (wt%) under stirring, after stirring evenly, add 10% (wt%) cationic surfactant cetyltrimethylammonium bromide Aqueous solution 250 milliliters produces silver ion-loaded silica gel, then stands and settles, removes the supernatant clear night, then washes the gel with deionized water, after the residual nitrate ion meets the product requirements, the precipitate is dried, and then pulverized to obtain silver ion Silicone gel powder.

Example 6

9.45 grams of silver nitrate solids are added to 49.3 liters of deionized water and dissolved at room temperature to prepare a silver nitrate solution; In the silver solution, stir evenly, then add 500 milliliters of silica sol aqueous solution containing silicon dioxide 30% (wt%) under stirring, after stirring evenly, add 10% (wt%) polyoxyethylene sorbitan monooleate Aqueous solution 32.5 milliliters generates silver ion-loaded silica gel, then washes the gel with deionized water, after the residual nitrate ion meets the product requirements, the precipitate is added to deionized water to disperse into a uniform silver ion-loaded silica gel suspension .

Example 7

9.45 grams of silver nitrate solids are added to 49.3 liters of deionized water and dissolved at room temperature to prepare a silver nitrate solution; 25.5 milliliters of 10% (wt %) anionic surfactant sodium dodecylsulfonate aqueous solution are added in the silver nitrate solution , stir evenly, then add 500 milliliters of silica sol aqueous solution containing silicon dioxide 30% (wt%) under stirring, after stirring uniformly, add 280 milliliters of 10% (wt%) dodecyl dimethyl betaine aqueous solution to generate carrier The silver ion silica gel is then centrifuged and dehydrated, the filter cake is washed with deionized water, then the filter cake is dried and pulverized to obtain the silver ion loaded silica gel powder.

Example 8

9.45 grams of silver nitrate solids are added to 49.3 liters of deionized water and dissolved at room temperature to prepare a silver nitrate solution; 32.5 milliliters of 10% (wt %) dodecyl dimethyl betaine aqueous solution are added to the silver nitrate solution, stirred Uniformly, then add 500 milliliters of silica sol aqueous solution containing silicon dioxide 30% (wt%) under stirring, after stirring uniformly, add 10% (wt%) cationic surfactant cetyltrimethylammonium bromide aqueous solution 250 Milliliters of silver ion-loaded silica gel is generated, and then left to settle, the upper clear night is removed, and then the gel is washed with deionized water until the residual nitrate ion meets the product requirements, and the precipitate is dried and then pulverized to obtain a silver ion-loaded silica gel. Glue powder.

Example 9

9.45 grams of silver nitrate solids are added to 49.3 liters of deionized water and dissolved at room temperature to prepare a silver nitrate solution; 32.5 milliliters of 10% (wt %) anionic surfactant sodium dodecylbenzenesulfonate aqueous solution are added to the silver nitrate solution , stir evenly, then add 500 milliliters of silica sol aqueous solution containing 30% (wt%) of silicon dioxide under stirring, after stirring evenly, add 10% (wt%) cationic surfactant cetyl trimethyl bromide 250 ml of ammonium aqueous solution generates white silver-ion-loaded silica gel, then settles, removes the supernatant, and then washes the gel with deionized water until the residual nitrate ion meets the product requirements, then adds the precipitate to deionized water to disperse into a uniform silver ion-loaded silica gel suspension.

Example 10

9.45 grams of silver nitrate solids are added to 49.3 liters of deionized water and dissolved at room temperature to prepare a silver nitrate solution; In the silver solution, stir evenly, then add 500 milliliters of silica sol aqueous solution containing silicon dioxide 30% (wt%) under stirring, after stirring, add 10% (wt%) anionic surfactant dodecylbenzenesulfonic acid 32.5 milliliters of sodium aqueous solution produces white silver-ion-loaded silica gel, which is then left to settle, removes the supernatant clear night, then centrifuges and dehydrates, washes the filter cake with deionized water, then dries the filter cake, and then pulverizes it to obtain a silver-ion-loaded silica gel. Glue powder.

Claims (5)

1. a preparation method of silver ion-loaded silica gel, is characterized in that, the method comprises the following reaction steps: 1). Add silver nitrate solid to deionized water for dissolving to prepare silver nitrate solution; 2). Add surfactant to silver nitrate solution; 3). Adding silica sol to the solution; 4). Add surfactant to obtain silver ion-loaded silica gel. 2. the preparation method of silver ion-loaded silica gel according to claim 1 is characterized in that, wherein said surfactant is anionic surfactant, cationic surfactant or amphoteric surfactant. 3. the preparation method of silver-loaded ion silica gel according to claim 2 is characterized in that, wherein said anionic surfactant can be sodium lauryl sulfate, sodium lauryl sulfate or dodecyl sodium sulfate Sodium Alkylbenzene Sulfonate. 4. the preparation method of silver ion-loaded silica gel according to claim 2 is characterized in that, wherein said cationic surfactant can be hexadecyl trimethyl ammonium bromide or octadecyl trimethyl ammonium chloride. 5. the preparation method of silver ion-loaded silica gel according to claim 2 is characterized in that, wherein said amphoteric surfactant can be polyoxyethylene sorbitan monooleate or dodecyl di Methyl betaine.