Inorganic antiseptic of RE activated silver carrying matter and its prepn

An inorganic antibacterial agent and technology of antibacterial agent are applied in the field of rare earth activated silver-loaded inorganic antibacterial agent and its preparation field, which can solve the problems of easy discoloration and blackening, easy blackening of antibacterial agent, influence on popularization and use, etc., and achieves good heat resistance. , The effect of good discoloration resistance

Active Publication Date: 2006-03-01
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] These types of antibacterial agents loaded with silver ions have two major disadvantages: one, precious metal silver can cause the production cost of antibacterial agents to be too high as an antibacterial component, thereby affecting its popularization and use on a large scale; Second, the weather resistance of silver-loaded antibacterial agents is poor; the chemical properties of silver ions are relatively active, and they are more sensitive to heat and light, especially antibacterial agents are easy to turn black after ultraviolet radiation, thereby affecting the appearance of white or light-colored crystals; Under alkaline or heating conditions, its antibacterial products, such as various plastic products, coatings, ceramic products, antibacterial building materials, etc., are prone to discoloration and blackening
[0007] After retrieval, Chinese patent CN1586202A discloses a composite inorganic antibacterial agent with a porous structure of the coating layer carrying antibacterial silver ions; CN1256868A and CN1286915A all record silver-loaded series composite inorganic antibacterial agents; and CN1404732A "inorganic antibacterial agent and its production process", CN1123291C's "high-temperature inorganic antibacterial agent", CN1240578A's "long-sensitivity inorganic antibacterial agent and its preparation and application"; these published patents all relate to the cost reduction and discoloration resistance improvement of silver-loaded inorganic antibacterial agents, But the inorganic antibacterial agent prepared by these methods still can't solve the discoloration problem of silver antibacterial agent well

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The prepared sodium zirconium hydroxyphosphate 50g was placed in a beaker, and dispersed under electric stirring for 2 hours; Zn(NO 3 ) 2 2.5g, AgNO 3 1.0 g, and respectively made into 10wt% solution with deionized water.

[0024] Adjust the temperature of the water bath at 60°C, place the beaker with the carrier sodium zirconium hydroxyphosphate in the water bath; add silver nitrate solution and zinc nitrate solution in sequence while continuing to stir; then add dilute nitric acid or NaOH solution to adjust its pH The value is 4. Weighed 0.5 g of the rare earth element compound lanthanum nitrate, made it into a 1 wt % solution, added it to the above emulsion, kept the temperature at 60° C., and carried out the ion exchange reaction for 4 hours. Then the emulsion was vacuum filtered, washed three times with deionized water, and the obtained filter cake was calcined at 800° C., and then ground and pulverized to obtain Sample 1.

Embodiment 2

[0026] The prepared sodium zirconium hydroxyphosphate 50g was placed in a beaker and dispersed under electric stirring for 2 hours; respectively weighed Cu(NO 3 ) 2 1.0g, Zu(NO 3 )3.0g, AgNO 3 2.0g, and were made into 10wt% solution with deionized water.

[0027] Adjust the temperature of the water bath at 70°C, place the beaker with the carrier sodium zirconium hydroxyphosphate in the water bath; add silver nitrate solution, copper nitrate solution, and zinc nitrate solution in sequence while continuing to stir; then add dilute nitric acid or NaOH solution , adjust its pH value to 3. Weigh 0.5 g of the rare earth element compound yttrium nitrate, prepare a 1 wt % solution, add it to the above emulsion, keep the temperature at 70° C., and carry out ion exchange reaction for 5 hours. Then the emulsion was vacuum filtered, washed three times with deionized water, and the obtained filter cake was calcined at 700° C., and then ground and pulverized to obtain sample 2.

Embodiment 3

[0029] The prepared sodium zirconium hydroxyphosphate 50g was placed in a beaker and dispersed under electric stirring for 2 hours; respectively weighed Cu(NO 3 ) 2 1.0g, Zu(NO 3 ) 2.0g, AgNO 3 2.0g, and were made into 10wt% solution with deionized water.

[0030] Adjust the temperature of the water bath at 60°C, place the beaker with the carrier sodium zirconium hydroxyphosphate in the water bath; add silver nitrate solution, zinc nitrate solution, and copper nitrate solution in sequence while continuing to stir; then add dilute nitric acid or NaOH solution , adjust its pH value to 4. Weighed 0.5 g of the rare earth element compound lanthanum nitrate, made it into a 1 wt % solution, added it to the above emulsion, kept the temperature at 60° C., and carried out the ion exchange reaction for 4 hours. Then the emulsion was vacuum filtered, washed three times with deionized water, and the obtained filter cake was calcined at a temperature of 800° C., and then ground and pulv...

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PUM

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Abstract

The present invention is inorganic antiseptic of RE activated silver carrying matter and its preparation, and belongs to the field of inorganic antiseptic purifying material technology. The present invention adopts compound phosphate as the porous carrier for inorganic silver antiseptic to carry several kinds of antiseptic ions, such as Ag, Zn and Cu ions simultaneously, and RE element, such as La, Y, etc. with activating characteristic to improve antiseptic performance and color change resistance. The antiseptic has powerful antiseptic performance, good ultraviolet ray radiation resistance, and less color change and blackening. It may be added into various kinds of plastic, paint, building ceramic material to produce antiseptic products for furniture and household decoration.

Description

technical field [0001] The invention relates to a rare earth-activated silver-loaded inorganic antibacterial agent and a preparation method thereof, belonging to the technical field of inorganic chemical antibacterial agent purification materials. Background technique [0002] Many metal ions, such as silver ions, copper ions, zinc ions, etc., have antibacterial properties. For example, silver ions exist in the form of silver nitrate solution, which is widely used as a disinfectant and antibacterial agent, but it is inconvenient to use in a solution state, and its use is also limited. There have been many reports on related antibacterial materials and preparation techniques. Such as the preparation method of antibacterial zeolite, the preparation of silver-zinc combined antibacterial agent, the preparation of composite silver-based inorganic antibacterial agent, etc. [0003] Most of the original inorganic antibacterial agents use zeolite, calcium phosphate, glass and othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16
Inventor 施利毅邹冬梅张大卫方建慧张剑平
Owner SHANGHAI UNIV
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