A method for TiO2 nano polymerization synergistic modification of and coloration of pearls

A synergistic modification and pearl technology, which can be used in jewelry, clothing, applications, etc., can solve the problems of inability to improve the quality of pearls, and achieve the effects of good anti-ultraviolet fading, improved wear resistance, and simple preparation process

Inactive Publication Date: 2009-06-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a certain effect on reducing the damage caused by organic solvents, but it cannot improve the damage to pearl quality caused by visible light and ultraviolet rays.

Method used

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  • A method for TiO2 nano polymerization synergistic modification of and coloration of pearls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Prepare a mixed solution of hydrogen peroxide, methanol and ether, the volume ratio of methanol to ether is 1:1, and the mass fraction of hydrogen peroxide in the mixed solution is 1%;

[0024] 2) Put the pearls into the above mixture and treat them for 2 days at 35°C under the irradiation of fluorescent lamps, and place them in C after drying. 28 h 31 ClN 2 o 3 In the dyeing agent, it is dyed at 90°C and normal pressure;

[0025] 3) At 80°C, mix titanyl sulfate and hydrogen peroxide to prepare TiO 2 Aqueous sol, Ti / H 2 o 2 The molar ratio is 1:1, and the sol concentration is controlled at 0.1mol / L;

[0026] 4) React the dyed pearls prepared in step 2) with the aqueous sol for 5 seconds, then spin-dry at 30 RMP in a 50°C thermostat for 10 minutes, and then heat-treat in a muffle furnace at 100°C for 10 minutes to obtain nano-TiO on the surface. 2 the intermediate state of dyed pearls;

[0027] 5) Aqueous emulsions with trade names AB-EP-20 and AB-HGF and deio...

Embodiment 2

[0030] 1) Prepare a mixed solution of hydrogen peroxide, methanol and ether, the volume ratio of methanol to ether is 1:1, and the mass fraction of hydrogen peroxide in the mixed solution is 5%;

[0031] 2) Put the pearls into the above mixed solution and treat them for 5 days at 20°C under the irradiation of fluorescent lamps, and place them in C after drying. 28 h 31 ClN 2 o 3 In the dyeing agent, dye at 45°C and normal pressure;

[0032] 3) At 90°C, the Ti(OH) 4 Mixed with hydrogen peroxide to prepare TiO 2 Aqueous sol, Ti / H 2 o 2 The molar ratio is 1:3, and the sol concentration is controlled at 0.3mol / L;

[0033] 4) React the dyed pearls prepared in step 2) with the aqueous sol for 25 seconds, then spin-dry at 60 RMP in an incubator at 80°C for 10 minutes, and then heat-treat at 300°C in a muffle furnace for 5 minutes to obtain nano-TiO on the surface. 2 the intermediate state of dyed pearls;

[0034] 5) Aqueous emulsions with trade names AB-EP-20 and AB-HGF and ...

Embodiment 3

[0037] 1) Prepare a mixed solution of hydrogen peroxide, methanol and ether, the volume ratio of methanol to ether is 1:1, and the mass fraction of hydrogen peroxide in the mixed solution is 3%;

[0038]2) Put the pearls into the above mixed solution and treat them for 7 days at 25°C under the irradiation of fluorescent lamps, and place them in C after drying. 28 h 31 ClN 2 o 3 In the dyeing agent, dye at 30°C and normal pressure;

[0039] 3) At 100°C, Ti(O i Pr) 4 Mixed with hydrogen peroxide to prepare TiO 2 Aqueous sol, Ti / H 2 o 2 The molar ratio is 1:4, and the sol concentration is controlled at 0.5mol / L;

[0040] 4) React the dyed pearls prepared in step 2) with the aqueous sol for 60 seconds, then spin-dry at 30 RMP in a 100°C thermostat for 10 minutes, and then heat-treat in a muffle furnace at 500°C for 10 seconds to obtain nano-TiO on the surface. 2 the intermediate state of dyed pearls;

[0041] 5) Aqueous emulsions with trade names AB-EP-20 and AB-HGF and ...

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Abstract

The invention discloses a method for synergism-modifying dyed pearl with nano TiO2 Polymerization. Steps are as follows: 1) preparing mixed liquor of hydrogen peroxide, methanol and ether, 2) putting pearls in the mixed liquor for photoillumination pretreatment, drying and dyeing under normal pressure, 3) preparing aqueous collosol with TiO2, 4) reacting the dyed pearls with aqueous collosol, drying, heat-treating to obtain intermediate state dyed pearls with nano TiO2 on the surface, 5) stirring for reacting aqueous emulsion with deionized water to prepare precursor of aqueous solution, and 6) carrying out a polyreaction between intermediate state dyed pearls and precursor Solution, drying, and heat-treating to obtain the final product. The modified dyed pearls have good uvioresistant fading and decay resistance performance. compared with common dyed pearls, the fade resistance of the modified dyed pearls is improved at least 3-4 times, sweat corrosive resistance is improved at least 4-5 times, polish is improved one or two rates, and wear resistance is also improved.

Description

technical field [0001] The present invention relates to nanometer TiO 2 - A method of synergistically modifying dyed pearls by polymerization. Background technique [0002] The color of pearls can be roughly divided into five major color systems: white, yellow, red, dark and variegated. Whether the pearls just taken out of the mother oyster are natural or cultured pearls, the color is unsatisfactory, and the color purity, saturation, and uniformity of the pearls are very few. People around the world have different preferences for the color of pearls. For example, Americans generally like white pearls with pink hues, Indians like golden yellow pearls, and Turks like blue or green pearls. In recent years, black pearls have also been favored in the international market. [0003] More than 90% of pearls need to be processed after harvesting to increase their economic value. On the other hand, in order to make the color uniform or meet the requirements of customers, colored p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A44C27/00
Inventor 杜丕一王慧陈海军李小龙翁文剑韩高荣赵高凌汪建勋宋晨路沈鸽徐刚张溪文
Owner ZHEJIANG UNIV
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