Method for preparing multifunctional nano silver solution

Abstract

The invention discloses a method for preparing a multifunctional nano silver solution. A nano silver solution with the grain diameter of 20-100nm is carried by utilizing a surface modified tourmaline particle. The preparation method has simple process, mild reaction condition and lower preparation cost and meanwhile has the characteristics of broad-spectrum antibacterial property, anion release performance, favorable water absorptivity, and the like. The invention can be widely applied to a hygienic product and an appliance for daily life.

Description

technical field

[0001] The invention relates to a preparation method and application of a multifunctional nanometer silver solution. Background technique

[0002] Silver has broad-spectrum antimicrobial properties. Trace amounts of silver in solution have the ability to kill bacteria. Silver ions can block bacterial respiratory enzyme system and interfere with bacterial metabolism to cause bacterial death, but the instability of silver ions in solution limits its popularization and application. Nano-silver is the processing of metallic silver into nano-scale particles, which has made a qualitative leap in the bactericidal ability of silver. At a concentration of a few parts per million, it can kill common bacteria, fungi, mycoplasma, chlamydia, etc. microorganism. Nano-silver prepared by nanotechnology has stable chemical properties and has excellent properties in electricity, optics and catalysis. Nano-silver has been widely used in the preparation of antibacterial mate...

Examples

Embodiment example 1

[0013] Dissolve 6 g of silver nitrate in 500 ml of deionized water, add 5% ammonia water dropwise until the precipitate disappears to form a complex solution, the concentration of silver nitrate in the obtained complex solution A is about 0.07 mol / l, and the concentration of ammonia is 0.6 mol / l. Add 5 g of tourmaline powder with a particle size of 1 to 2 μm into 200 ml of deionized water to obtain a suspension, and let it stand for 24 hours. Get supernatant, add 17g sodium dodecylbenzene sulfonate and fully stir to obtain component B, wherein the weight ratio of tourmaline particles, deionized water and sodium dodecylbenzenesulfonate is 5: 10: 13. Add complex solution A to solution B, the volume ratio of solution B to solution A is 1:2, and stir at 30° C. for 3 h to obtain a suspension. Add 0.1g of citric acid, the concentration of citric acid is 0.07mol / l, heat up to 90°C, keep the temperature for 3h to obtain nano-silver sol component C, at this time the silver ammonium ion...

Embodiment example 2

[0015] 9 g of silver nitrate was dissolved in 500 ml of deionized water, and 7.5% ammonia water was added dropwise until the precipitate disappeared to form a complex solution. The concentration of silver nitrate in the obtained complex solution A was about 0.1 mol / l, and the concentration of ammonia was 0.8 mol / l. Add 7 g of tourmaline powder with a particle size of 1 to 2 μm to 150 ml of triethanolamine to obtain a suspension, and let it stand for 18 hours. Take the supernatant, add 9g of sodium dodecylsulfate and fully stir to obtain component B, wherein the weight ratio of tourmaline particles, triethanolamine and sodium dodecylbenzenesulfonate is 7:6:11. Add complex solution A to solution B, the volume ratio of solution B to solution A is 1:4, and stir at 45° C. for 6 h to obtain a suspension. Add 0.2g sodium citrate, the concentration of sodium citrate is 0.16mol / l, heat up to 75°C, keep the temperature for 2h to obtain nano silver sol component C, at this time modify th...

Embodiment example 3

[0017] Dissolve 12 g of silver nitrate in 500 ml of deionized water, add dropwise 20% ammonia water until the precipitate disappears and become a complex solution. The concentration of silver nitrate in complex solution A is about 0.2 mol / l, and the concentration of ammonia is 0.95 mol / l. Add 9 g of tourmaline powder with a particle size of 0.2 to 1 μm into 150 ml of Tween to obtain a suspension and let it stand for 24 hours. Take the supernatant, add 6g sodium dodecyl sulfate and stir well to obtain component B, wherein the weight ratio of tourmaline particles, Tween and sodium lauryl sulfate is 7:7:10. Add complex solution A to solution B, the volume ratio of solution B to solution A is 1:6, and stir at 20° C. for 4 h to obtain a suspension. Add 0.15 g of potassium borohydride, the concentration of potassium borohydride is 0.56 mol / l, raise the temperature to 70° C., and keep the temperature for 2 hours to obtain nano-silver sol component C. At this time, modify the silver a...

technical field

[0001] The invention relates to a preparation method and application of a multifunctional nanometer silver solution. Background technique

[0002] Silver has broad-spectrum antimicrobial properties. Trace amounts of silver in solution have the ability to kill bacteria. Silver ions can block bacterial respiratory enzyme system and interfere with bacterial metabolism to cause bacterial death, but the instability of silver ions in solution limits its popularization and application. Nano-silver is the processing of metallic silver into nano-scale particles, which has made a qualitative leap in the bactericidal ability of silver. At a concentration of a few parts per million, it can kill common bacteria, fungi, mycoplasma, chlamydia, etc. microorganism. Nano-silver prepared by nanotechnology has stable chemical properties and has excellent properties in electricity, optics and catalysis. Nano-silver has been widely used in the preparation of antibacterial mate...

Examples

Embodiment example 1

[0013] Dissolve 6 g of silver nitrate in 500 ml of deionized water, add 5% ammonia water dropwise until the precipitate disappears to form a complex solution, the concentration of silver nitrate in the obtained complex solution A is about 0.07 mol / l, and the concentration of ammonia is 0.6 mol / l. Add 5 g of tourmaline powder with a particle size of 1 to 2 μm into 200 ml of deionized water to obtain a suspension, and let it stand for 24 hours. Get supernatant, add 17g sodium dodecylbenzene sulfonate and fully stir to obtain component B, wherein the weight ratio of tourmaline particles, deionized water and sodium dodecylbenzenesulfonate is 5: 10: 13. Add complex solution A to solution B, the volume ratio of solution B to solution A is 1:2, and stir at 30° C. for 3 h to obtain a suspension. Add 0.1g of citric acid, the concentration of citric acid is 0.07mol / l, heat up to 90°C, keep the temperature for 3h to obtain nano-silver sol component C, at this time the silver ammonium ion...

Embodiment example 2

[0015] 9 g of silver nitrate was dissolved in 500 ml of deionized water, and 7.5% ammonia water was added dropwise until the precipitate disappeared to form a complex solution. The concentration of silver nitrate in the obtained complex solution A was about 0.1 mol / l, and the concentration of ammonia was 0.8 mol / l. Add 7 g of tourmaline powder with a particle size of 1 to 2 μm to 150 ml of triethanolamine to obtain a suspension, and let it stand for 18 hours. Take the supernatant, add 9g of sodium dodecylsulfate and fully stir to obtain component B, wherein the weight ratio of tourmaline particles, triethanolamine and sodium dodecylbenzenesulfonate is 7:6:11. Add complex solution A to solution B, the volume ratio of solution B to solution A is 1:4, and stir at 45° C. for 6 h to obtain a suspension. Add 0.2g sodium citrate, the concentration of sodium citrate is 0.16mol / l, heat up to 75°C, keep the temperature for 2h to obtain nano silver sol component C, at this time modify th...

Embodiment example 3

[0017] Dissolve 12 g of silver nitrate in 500 ml of deionized water, add dropwise 20% ammonia water until the precipitate disappears and become a complex solution. The concentration of silver nitrate in complex solution A is about 0.2 mol / l, and the concentration of ammonia is 0.95 mol / l. Add 9 g of tourmaline powder with a particle size of 0.2 to 1 μm into 150 ml of Tween to obtain a suspension and let it stand for 24 hours. Take the supernatant, add 6g sodium dodecyl sulfate and stir well to obtain component B, wherein the weight ratio of tourmaline particles, Tween and sodium lauryl sulfate is 7:7:10. Add complex solution A to solution B, the volume ratio of solution B to solution A is 1:6, and stir at 20° C. for 4 h to obtain a suspension. Add 0.15 g of potassium borohydride, the concentration of potassium borohydride is 0.56 mol / l, raise the temperature to 70° C., and keep the temperature for 2 hours to obtain nano-silver sol component C. At this time, modify the silver a...