Graphene-containing aqueous fully-synthetic cutting fluid and application thereof

Abstract

The invention provides a water-based fully-synthetic cutting fluid. The water-based fully-synthetic cutting fluid comprises the following raw materials in percentage by mass: 3-8% of boric acid, 1-5% of sodium dihydrogen phosphate, 5-10% of citric acid, 1-5% of graphene, 0.5-3% of triethyl phosphate, 2-8% of diethylene glycol, 5-15% of an antirust agent, 2-6% of polyoxyethylene stearate, 1-3% of a bactericide, 0.1-1% of a defoaming agent, 0.5-2% of a settling agent and the balance of water. The average sheet diameter of the graphene ranges from 120 nm to 160 nm. According to the graphene-containing water-based fully-synthetic cutting fluid disclosed by the invention, by optimizing a formula, particularly further adding a proper amount of triethyl phosphate and graphene into a proper formula, the lubricating property and the corrosion resistance of the water-based fully-synthetic cutting fluid can be effectively improved, and the service life is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal processing, especially the field of metal cutting fluids, and particularly relates to an aqueous fully synthetic cutting fluid containing graphene and its application. Background Art

[0002] Cutting fluid (cutting fluid, coolant) is an industrial liquid used in metal cutting and grinding processes to cool and lubricate the cutting tool and the workpiece. Cutting fluids are classified into two major categories according to the chemical composition of the oil: non-water-soluble (oil-based) fluids and water-soluble (water-based) fluids. Water-based cutting fluids can be divided into emulsion fluids, semi-synthetic cutting fluids, and synthetic cutting fluids. Aqueous fully synthetic cutting fluid is a cutting fluid based on water as the main component, and by adding a variety of functional additives to meet various requirements such as lubrication, cooling, cleaning, and rust prevention during the metal processing.

[0003] Compared with oil-based cutting fluids, water-based cutting fluids have better cooling performance but poorer lubrication performance. Therefore, there is a need in the art for a water-based cutting fluid with better lubrication performance. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide an aqueous fully synthetic cutting fluid containing graphene, which has good lubrication performance and anti-corrosion performance and a long service life.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions.

[0006] The first aspect of the present invention provides an aqueous fully synthetic cutting fluid, which comprises raw materials in the following mass fractions: boric acid 3% - 8%, sodium dihydrogen phosphate 1% - 5%, citric acid 5% - 10%, graphene 1% - 5%, triethyl phosphate 0.5% - 3%, diethylene glycol 2% - 8%, rust inhibitor 5% - 15%, polyoxyethylene stearate 2% - 6%, bactericide 1% - 3%, defoamer 0.1% - 1%, sedimentation agent 0.5% - 2%, and the balance is water; the average sheet diameter of the graphene is 120nm - 160nm.

[0007] In some embodiments, the aqueous fully synthetic cutting fluid comprises raw materials in the following mass fractions: boric acid 3% - 8%, sodium dihydrogen phosphate 1% - 5%, citric acid 5% - 10%, graphene 1% - 5%, triethyl phosphate 1% - 2%, diethylene glycol 2% - 8%, rust inhibitor 5% - 15%, polyoxyethylene stearate 2% - 6%, bactericide 1% - 2%, defoamer 0.1% - 1%, sedimentation agent 0.5% - 2%, and the balance is water; the average sheet diameter of the graphene is 120nm - 160nm.

[0008] In some preferred embodiments, the water-based fully synthetic cutting fluid comprises raw materials in the following mass fractions: boric acid 5%, sodium dihydrogen phosphate 2.5%, citric acid 7%, graphene 3%, triethyl phosphate 1.5%, diethylene glycol 5%, rust inhibitor 10%, polyoxyethylene stearate 4%, bactericide 1.5%, defoamer 0.5%, sedimentation agent 1%, and the balance is water; the average sheet diameter of the graphene is 120 nm to 160 nm.

[0009] In some embodiments, the rust inhibitor is selected from at least one of sodium carbonate and triethanolamine.

[0010] In some embodiments, the bactericide is selected from at least one of phenoxyethanol and sodium benzoate.

[0011] In some embodiments, the defoamer is selected from at least one of diethylhexanol, isooctanol, isoamyl alcohol, polyoxyethylene castor oil ether, and methyl silicone oil.

[0012] In some embodiments, the sedimentation agent is selected from at least one of polyacrylamide and sodium acrylate.

[0013] The second aspect of the present invention provides the application of the water-based fully synthetic cutting fluid as described above in metal processing.

[0014] The present invention has the following beneficial effects.

[0015] The present invention provides a water-based fully synthetic cutting fluid containing graphene. Through the optimization of the formulation, especially by further adding an appropriate amount of triethyl phosphate and graphene to a suitable formulation, the lubricating performance and anti-corrosion performance of the water-based fully synthetic cutting fluid can be effectively improved, and the service life can be extended.

[0016] The water-based semi-synthetic cutting fluid of the present invention is suitable for the cutting processing of various metal materials (such as steel, cast iron, copper, aluminum, etc.), including turning, milling, drilling, grinding and other processes. When in use, the water-based semi-synthetic cutting fluid of the present invention is added to the circulation system of the cutting machine tool, and the cutting fluid is circulated by pumping. Detailed Embodiments

[0017] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the embodiments. The following are the preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. The purpose of providing these embodiments is to make the understanding of the disclosure content of the present invention more thorough and comprehensive. It should be understood that the experimental methods without specific conditions noted in the following embodiments are usually carried out under conventional conditions or according to the conditions recommended by the manufacturers. All kinds of commonly used reagents used in the embodiments are commercially available products.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of this invention are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0019] The following is an explanation in conjunction with specific embodiments.

[0020] Example 1

[0021] This example provides an aqueous semi-synthetic cutting fluid, which includes the following raw materials by mass fraction: boric acid 5%, sodium dihydrogen phosphate 2.5%, citric acid 7%, graphene 3%, triethyl phosphate 1.5%, diethylene glycol 5%, sodium carbonate 10%, polyoxyethylene stearate 4%, sodium benzoate 1.5%, diethylhexanol 0.5%, sodium acrylate 1%, and the balance is water.

[0022] Example 2

[0023] This example provides an aqueous semi-synthetic cutting fluid, which includes the following raw materials by mass fraction: boric acid 8%, sodium dihydrogen phosphate 5%, citric acid 5%, graphene 5%, triethyl phosphate 2%, diethylene glycol 2%, sodium carbonate 10%, polyoxyethylene stearate 6%, sodium benzoate 1%, diethylhexanol 1%, sodium acrylate 0.5%, and the balance is water.

[0024] Example 3

[0025] This example provides an aqueous semi-synthetic cutting fluid, which includes the following raw materials by mass fraction: boric acid 7%, sodium dihydrogen phosphate 1%, citric acid 10%, graphene 1%, triethyl phosphate 1%, diethylene glycol 8%, sodium carbonate 5%, polyoxyethylene stearate 2%, sodium benzoate 2%, diethylhexanol 0.3%, sodium acrylate 1%, and the balance is water.

[0026] Example 4

[0027] This example provides an aqueous semi-synthetic cutting fluid, which includes the following raw materials by mass fraction: boric acid 4%, sodium dihydrogen phosphate 3%, citric acid 6%, graphene 4%, triethyl phosphate 1%, diethylene glycol 5%, sodium carbonate 12%, polyoxyethylene stearate 3%, sodium benzoate 1%, diethylhexanol 0.5%, sodium acrylate 1%, and the balance is water.

[0028] Comparative Example 1

[0029] This comparative example provides an aqueous semi-synthetic cutting fluid, which is the same as that in Example 1 except that it does not contain triethyl phosphate. Specifically, it includes the following raw materials with mass fractions: boric acid 5%, sodium dihydrogen phosphate 2.5%, citric acid 7%, graphene 3%, diethylene glycol 5%, sodium carbonate 10%, polyoxyethylene stearate 4%, sodium benzoate 1.5%, diethylhexanol 0.5%, acrylate 1%, and the balance is water.

[0030] The lubricating performance of the aqueous semi-synthetic cutting fluids prepared in the above examples and comparative examples was tested (in accordance with the GB / T6144-2010 standard).

[0031] The test results were filled in Table 1.

[0032] Table 1

[0033]

[0034] As can be seen from Table 1, the aqueous fully synthetic cutting fluid of the present invention has good lubricating performance, and it is found during use that the aqueous fully synthetic cutting fluid of the present invention has good anti-corrosion performance and a long service life.

[0035] Through the optimization of the formula, especially by further adding an appropriate amount of triethyl phosphate and graphene to a suitable formula, the present invention can effectively improve the lubricating performance and anti-corrosion performance of the aqueous fully synthetic cutting fluid and extend its service life.

[0036] Compared with Example 1, the aqueous fully synthetic cutting fluid in Comparative Example 1 does not add triethyl phosphate, and its lubricating performance decreases significantly.

[0037] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as these combinations of technical features do not conflict, they should be considered as the scope described in this specification.

[0038] The above embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A water-based fully synthetic cutting fluid, characterized in that: The invention comprises the following raw materials in mass fraction: 3% to 8% of boric acid, 1% to 5% of sodium dihydrogen phosphate, 5% to 10% of citric acid, 1% to 5% of graphene, 0.5% to 3% of triethyl phosphate, 2% to 8% of diethylene glycol, 5% to 15% of rust inhibitor, 2% to 6% of polyoxyethylene stearate, 1% to 3% of bactericide, 0.1% to 1% of defoamer, 0.5% to 2% of sedimentation agent, and the balance is water; the average flake diameter of the graphene is 120nm to 160nm.

2. The aqueous fully synthetic cutting fluid according to claim 1, characterized in that: The invention comprises the following raw materials in mass fractions: 3% to 8% of boric acid, 1% to 5% of sodium dihydrogen phosphate, 5% to 10% of citric acid, 1% to 5% of graphene, 1% to 2% of triethyl phosphate, 2% to 8% of diethylene glycol, 5% to 15% of rust inhibitor, 2% to 6% of polyoxyethylene stearate, 1% to 2% of bactericide, 0.1% to 1% of defoamer, 0.5% to 2% of sedimentation agent, and the balance is water; the average flake diameter of the graphene is 120nm to 160nm.

3. The aqueous fully synthetic cutting fluid according to claim 2, characterized in that: The invention comprises the following raw materials in mass fractions: 5% of boric acid, 2.5% of sodium dihydrogen phosphate, 7% of citric acid, 3% of graphene, 1.5% of triethyl phosphate, 5% of diethylene glycol, 10% of rust inhibitor, 4% of polyoxyethylene stearate, 1.5% of bactericide, 0.5% of defoamer, 1% of sedimentation agent, and the balance is water; the average sheet diameter of the graphene is 120nm-160nm.

4. The aqueous fully synthetic cutting fluid according to any one of claims 1 to 3, characterized in that: The rust inhibitor is selected from at least one of sodium carbonate and triethanolamine.

5. The aqueous fully synthetic cutting fluid according to any one of claims 1 to 3, characterized in that: The bactericide is selected from at least one of phenoxyethanol and sodium benzoate.

6. The aqueous fully synthetic cutting fluid according to any one of claims 1 to 3, characterized in that: The defoaming agent is selected from at least one of diethylhexanol, isooctyl alcohol, isopentanol, castor oil polyoxyethylene ether and methyl silicone oil.

7. The aqueous fully synthetic cutting fluid according to any one of claims 1 to 3, characterized in that: The sedimentation agent is selected from at least one of polyacrylic acid amide and sodium acrylate.

8. Use of the aqueous fully synthetic cutting fluid as claimed in any one of claims 1 to 7 in metal processing.

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