Composite antioxidant and preparation method thereof

Abstract

The invention discloses a compound antioxidant and a preparation method thereof. The compound antioxidant comprises the following raw materials: 50-100g of copper sulfate; 150 to 200 ml of sodium sulfite; 15 to 20g of disodium ethylene diamine tetraacetate; 5-10 g of sodium dodecyl benzene sulfonate; and 500 to 1000 ml of deionized water. The composite antioxidant is prepared by the following process steps: fully dissolving 50-100g of copper sulfate in 1L of deionized water, and uniformly stirring. Slowly adding 150-200ml of sodium sulfite into the copper sulfate solution, controlling the reaction temperature within 30-50 DEG C, and continuously stirring for 1-2 hours until the reaction is complete. Adding 15-20g of disodium ethylene diamine tetraacetate into the solution, and stirring for 1 hour to improve the stability of the antioxidant. And then adding 5-10g of sodium dodecyl benzene sulfonate, and stirring for 1 hour. And finally, removing impurities in the solution in a suction filtration or filtration manner to obtain the composite antioxidant. The composite antioxidant is safe, environmentally friendly and high in applicability, oxidation reaction of copper can be effectively inhibited to a certain extent, and the shelf life of the product is prolonged.

Description

Technical Field

[0001] The invention relates to an antioxidant, in particular to a composite antioxidant and a preparation method thereof. Background Art

[0002] Antioxidants are chemical substances that can be used to delay or organize the oxidation of substances. Copper antioxidants refer to antioxidants with copper as the main ingredient. Because of their high antioxidant properties and oxidation stability, copper antioxidants are often added to coatings in production and used to cover metal surfaces. They can play an antioxidant and protect metals, prevent oxidation and corrosion of the metal surface, and extend the service life of the metal.

[0003] Especially in common daily necessities, such as copper ribs for umbrellas, because their use environment is humid rainy weather and they cannot be dried quickly, higher performance requirements are placed on the antioxidants sprayed on the surface of the copper ribs. Effective copper antioxidants can effectively inhibit copper oxidation reactions to a certain extent and extend the service life of the copper ribs and umbrellas. Summary of the invention

[0004] To achieve the above objectives, the present invention is implemented by the following technical scheme: A technical scheme of a composite antioxidant is: comprising the following raw materials in parts by weight:

[0005] 50-100 g of copper sulfate; 150-200 ml of sodium sulfite; 15-20 g of disodium ethylenediaminetetraacetic acid; 5-10 g of sodium dodecylbenzene sulfonate; 500-1000 ml of deionized water.

[0006] Preferably, 50 g of copper sulfate; 150 ml of sodium sulfite; 15 g of disodium ethylenediaminetetraacetate; 5 g of sodium dodecylbenzene sulfonate; and 500 ml of deionized water.

[0007] Preferably, 75 g of copper sulfate; 175 ml of sodium sulfite; 17.5 g of disodium ethylenediaminetetraacetate; 7.5 g of sodium dodecylbenzene sulfonate; and 750 ml of deionized water.

[0008] Preferably, 100 g of copper sulfate; 200 ml of sodium sulfite; 20 g of disodium ethylenediaminetetraacetic acid; 10 g of sodium dodecylbenzene sulfonate; and 1000 ml of deionized water.

[0009] The composite antioxidant is prepared by the following process steps: 50-100 grams of copper sulfate is fully dissolved in 500-1000 milliliters of deionized water and stirred evenly. 150-200 milliliters of sodium sulfite are slowly added to the above copper sulfate solution, the reaction temperature is controlled within 30-50°C, and stirring is continued for 1-2 hours until the reaction is complete. 15-20 grams of disodium ethylenediaminetetraacetic acid are added to the above solution and stirred for 1 hour to improve the stability of the antioxidant. Then 5-10 grams of sodium dodecylbenzene sulfonate are added and stirred for 1 hour to improve the adhesion and uniformity of the antioxidant on the surface of the umbrella ribs. Finally, the impurities in the solution are removed by suction filtration or filtration, and the resulting composite antioxidant is obtained.

[0010] The preparation method of the composite antioxidant comprises the following steps:

[0011] Step 1: First, fully dissolve 50-100 grams of copper sulfate in 500-1000 milliliters of deionized water and stir evenly;

[0012] Step 2: Slowly add 150-200 ml of sodium sulfite to the above copper sulfate solution, control the reaction temperature within 30-50°C, and continue stirring for 1-2 hours until the reaction is complete;

[0013] Step 3: Add 15-20 g of disodium ethylenediaminetetraacetate to the above solution and stir for 1 hour to improve the stability of the antioxidant.

[0014] Step 4: Add 5-10 grams of sodium dodecylbenzene sulfonate and stir for 1 hour until it is completely dissolved, which can improve the adhesion and uniformity of the antioxidant on the surface of the umbrella ribs.

[0015] Step 5: Finally, remove the impurities from the solution by suction or filtration, and the resulting product is a composite antioxidant.

[0016] The beneficial effects of the present invention are:

[0017] 1. Safety and environmental protection: The invention does not contain toxic and harmful substances such as fluoride, peroxide, heavy metals, etc., can be directly touched by hands, no protective equipment is needed, and there is no three-degree emission problem, so it does not pollute the environment and is an environmentally friendly product.

[0018] 2. Strong applicability: does not affect the conductivity, welding and other properties of the workpiece.

[0019] 3. Significant effect: Its anti-oxidation property effectively prevents copper, brass, copper alloys, etc. from discoloration, fingerprints, and spots, and can maintain the original luster of copper, brass and copper alloys. It can effectively inhibit the oxidation reaction of copper to a certain extent and extend the shelf life of the product.

[0020] 4. Easy operation: The present invention is easy to operate. The raw materials can be mixed and stirred in a certain proportion and order, and batch production is possible. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0022] Embodiment 1

[0023] The invention provides a composite antioxidant, which comprises the following raw materials: 50 grams of copper sulfate, 150 milliliters of sodium sulfite, 15 grams of disodium ethylenediaminetetraacetate, 5 grams of sodium dodecylbenzene sulfonate, and 500 milliliters of deionized water.

[0024] The present invention also provides a preparation method of a composite antioxidant: a composite antioxidant and a preparation method thereof, 50 grams of copper sulfate is fully dissolved in 500 milliliters of deionized water and stirred evenly; then 150 milliliters of sodium sulfite is slowly added to the copper sulfate solution, the reaction temperature is controlled to be 40°C, and stirring is continued for 1 hour until the reaction is complete; 15 grams of disodium ethylenediaminetetraacetate is added to the solution and stirred for 1 hour to improve the stability of the antioxidant. Then 5 grams of sodium dodecylbenzene sulfonate is added and stirred for 1 hour until it is completely dissolved, which can improve the adhesion and uniformity of the antioxidant on the surface of the umbrella rib. Finally, the impurities of the solution are removed by suction filtration or filtration, and the resulting composite antioxidant is obtained.

[0025] Application of composite antioxidant: Add copper material into the mixed composite antioxidant solution for 2 minutes, then take it out and drain the water.

[0026] Embodiment 2

[0027] The invention provides a composite antioxidant, which comprises the following raw materials: 75 grams of copper sulfate, 175 milliliters of sodium sulfite, 17.5 grams of disodium ethylenediaminetetraacetate, 7.5 grams of sodium dodecylbenzene sulfonate, and 750 milliliters of deionized water.

[0028] The present invention also provides a method for preparing a composite antioxidant: 75 grams of copper sulfate is fully dissolved in 750 milliliters of deionized water and stirred evenly; 175 milliliters of sodium sulfite is slowly added to the copper sulfate solution, the reaction temperature is controlled to be 40°C, and stirring is continued for 1.5 hours until the reaction is complete; 17.5 grams of disodium ethylenediaminetetraacetate is added to the solution and stirred for 1 hour to improve the stability of the antioxidant. 7.5 grams of sodium dodecylbenzene sulfonate is then added and stirred for 1 hour until it is completely dissolved, which can improve the adhesion and uniformity of the antioxidant on the surface of the umbrella rib. Finally, the solution impurities are removed by suction filtration or filtering, and the resulting composite antioxidant is obtained.

[0029] Application of composite antioxidant: Place the copper material into the mixed composite antioxidant solution for 4 minutes, then take it out, drain the water, and then store it at an appropriate temperature.

[0030] Embodiment 3

[0031] The invention provides a composite antioxidant, which comprises the following raw materials: 100 grams of copper sulfate, 200 milliliters of sodium sulfite, 20 grams of disodium ethylenediaminetetraacetate, 10 grams of sodium dodecylbenzene sulfonate, and 1000 milliliters of deionized water.

[0032] The present invention also provides a method for preparing a composite antioxidant: 100 grams of copper sulfate is fully dissolved in 1000 milliliters of deionized water and stirred evenly; 200 milliliters of sodium sulfite is slowly added to the copper sulfate solution, the reaction temperature is controlled to be 40°C, and stirring is continued for 2 hours until the reaction is complete; 20 grams of disodium ethylenediaminetetraacetate is added to the solution and stirred for 1 hour to improve the stability of the antioxidant. 10 grams of sodium dodecylbenzene sulfonate is then added and stirred for 1 hour until it is completely dissolved, which can improve the adhesion and uniformity of the antioxidant on the surface of the umbrella rib. Finally, the solution impurities are removed by suction filtration or filtering, and the resulting composite antioxidant is obtained.

[0033] Application of composite antioxidant: Add copper material into the mixed composite antioxidant solution for 6 minutes, then take it out and drain the water.

[0034] Control group: Fresh meat products were not soaked in the compound antioxidant and were directly stored at a suitable temperature.

[0035] The copper samples were tested according to the products obtained in Examples 1-3 and Comparative Examples. After the surfaces of the samples were treated with antioxidants in the Examples and Comparative Examples, they were placed in a water mist box for testing. The test period was 20 days, during which the copper was sprayed continuously at a temperature of 28°C. During the test, the surface morphology of the copper was observed and recorded. The test results are shown in Table 1:

[0036] Table 1:

[0037] Day 0 10 days 20 days Example 1 No rust on the copper surface No rust on the copper surface Some copper rust appears on the surface of copper Example 2 No rust on the copper surface No rust on the copper surface No rust on the copper surface Example 3 No rust on the copper surface No rust on the copper surface No rust on the copper surface Comparison example No rust on the copper surface Some copper rust appears on the surface of copper There is more copper rust on the surface of copper

[0038] The results show that, for copper materials that have not been soaked in the composite antioxidant, some copper rust appeared on the surface on the 10th day, and more copper rust appeared on the surface on the 20th day; for copper materials that have been soaked in the composite antioxidant for 2 minutes, some copper rust appeared on the surface on the 20th day; and for copper materials that have been soaked in the composite antioxidant for 4 minutes and 6 minutes, no copper rust appeared on the surface during the test.

[0039] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention.

Claims

1. A composite antioxidant, characterized in that: Including the following ingredients: 50-100 g of copper sulfate; 150-200 ml of sodium sulfite; 15-20 g of disodium ethylenediaminetetraacetic acid; 5-10 g of sodium dodecylbenzene sulfonate; 500-1000 ml of deionized water.

2. A composite antioxidant according to claim 1, characterized in that: 50 g copper sulfate; 150 ml sodium sulfite; 15 g disodium ethylenediaminetetraacetic acid; 5 g sodium dodecylbenzene sulfonate; 500 ml deionized water.

3. A composite antioxidant according to claim 1, characterized in that: 75 g copper sulfate; 175 ml sodium sulfite; 17.5 g disodium ethylenediaminetetraacetic acid; 7.5 g sodium dodecylbenzene sulfonate; 750 ml deionized water.

4. A composite antioxidant according to claim 1, characterized in that: 100 g copper sulfate; 200 ml sodium sulfite; 20 g disodium ethylenediaminetetraacetic acid; 10 g sodium dodecylbenzene sulfonate; 1000 ml deionized water.

5. A composite antioxidant according to claim 1, characterized in that: The composite antioxidant is prepared by the following process steps: fully dissolving 50-100 grams of copper sulfate in 500-1000 milliliters of deionized water and stirring evenly; slowly adding 150-200 milliliters of sodium sulfite to the copper sulfate solution, controlling the reaction temperature within 30-50°C, and continuously stirring for 1-2 hours until the reaction is complete; adding 15-20 grams of disodium ethylenediaminetetraacetate to the solution and stirring for 1 hour to improve the stability of the antioxidant; then adding 5-10 grams of sodium dodecylbenzene sulfonate and stirring for 1 hour to improve the adhesion and uniformity of the antioxidant on the surface of the umbrella rib; and finally removing impurities from the solution by suction filtration or filtering to obtain the composite antioxidant.

6. A method for preparing the composite antioxidant according to claim 5, characterized in that: The following steps are involved: Step 1: First, fully dissolve 50-100 grams of copper sulfate in 500-1000 milliliters of deionized water and stir evenly; Step 2: Slowly add 150-200 ml of sodium sulfite to the above copper sulfate solution, control the reaction temperature within 30-50°C, and continue stirring for 1-2 hours until the reaction is complete; Step 3: Add 15-20 g of disodium ethylenediaminetetraacetate to the above solution and stir for 1 hour to improve the stability of the antioxidant. Step 4: Add 5-10 grams of sodium dodecylbenzene sulfonate and stir for 1 hour to improve the adhesion and uniformity of the antioxidant on the surface of the umbrella ribs. Step 5: Finally, remove the impurities from the solution by suction or filtration, and the resulting product is a composite antioxidant.

7. A composite antioxidant according to claim 6, characterized in that: It can be used by dipping, spraying or coating.

8. A composite antioxidant according to claim 6, characterized in that: When using, dilute with water at a ratio of 1:800, that is, 1 part of complex antioxidant to 800 parts of water.

9. A composite antioxidant according to claim 6, characterized in that: The processing temperature during use is from room temperature to 60°C, and the processing time is 3-5 minutes.