Controllable flocculation-rapid sedimentation type water-based cutting fluid for sapphire diamond wire cutting and preparation method of controllable flocculation-rapid sedimentation type water-based cutting fluid

Abstract

The invention relates to a controllable flocculation-rapid sedimentation type water-based cutting fluid for sapphire diamond wire cutting and a preparation method of the controllable flocculation-rapid sedimentation type water-based cutting fluid. Comprising 8%-20% of cloud point controllable polyether, 8%-15% of an ester lubricant, 1%-5% of an organic molybdenum-boric acid ester composite extreme pressure agent, 0.0003%-0.015% of cationic polyacrylamide, 2%-7% of isomeric alcohol polyoxyethylene ether, 1%-4% of triethanolamine, 0.2%-1.5% of a bactericide, 0.05%-0.5% of a defoaming agent and the balance of deionized water. The method has a synergistic mechanism of weak dispersion and cationic PAM trace controllable flocculation, and has the advantages that the 30-min sedimentation rate of AlOmicro powder and diamond chippings is larger than or equal to 90%, supernate is directly recycled, no visible particles exist on the surface of a slice, the liquid change period of cutting liquid is larger than or equal to 60 days, the service life of a diamond wire is larger than or equal to 150 km, waste powder can be subjected to filter-pressing high-value recycling, and the comprehensive cutting cost is reduced by 28-45%.

Description

Technical Field

[0001] This invention relates to a controllable flocculation-rapid sedimentation water-based cutting fluid for sapphire diamond wire cutting and its preparation method. Background Technology

[0002] Currently, when cutting sapphire, the lifespan of a single roll of diamond wire is only 58-72km, and the cutting fluid needs to be replaced every 7-12 days. The sedimentation rate of the waste fluid after cutting is only about 12%, the turbidity of the supernatant of the waste fluid is 680, and there are obvious black spots on the surface of the slice. The wastewater cannot be filtered due to the presence of a large amount of waste material. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a controllable flocculation-rapid sedimentation water-based cutting fluid for sapphire diamond wire cutting and its preparation method. The synergistic mechanism of weak dispersion and cationic PAM micro-controllable flocculation achieves a sedimentation rate of ≥90% for Al2O3 micro powder and diamond chips within 30 min, direct reuse of the supernatant, no visible particles on the slice surface, a cutting fluid replacement cycle of ≥60 days, a diamond wire life of ≥150 km, and high-value recovery of waste powder through pressure filtration, resulting in a 28-45% reduction in overall cutting costs.

[0004] To achieve the above objectives, the first technical solution of the present invention is as follows: a controllable flocculation-rapid sedimentation water-based cutting fluid for sapphire diamond wire cutting, characterized by comprising: 8–20% cloud-controllable polyether, 8–15% ester lubricant, 1–5% organic molybdenum-boron ester composite extreme pressure agent, 0.0003–0.015% cationic polyacrylamide, 2–7% isomeric alcohol polyoxyethylene ether, 1–4% triethanolamine, 0.2–1.5% bactericide, 0.05–0.5% defoamer, and the balance being deionized water.

[0005] This technical solution also includes sodium polyaspartate, wherein the mass ratio of sodium polyaspartate is 0 to 0.3%.

[0006] In this technical solution, the ester lubricant includes PEG400 dioleate or TMPTO.

[0007] In this technical solution, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 10:4 to 1:1.

[0008] In this technical solution, the cationic polyacrylamide has a molecular weight of 12 million to 18 million and an ionicity of 30% to 60%.

[0009] This technical solution also includes a nano-cerium oxide dispersion with a mass ratio of 0.8%, wherein the nano-cerium oxide particles have a diameter of 20–50 nm, and the boiling point of the cloud point controllable polyether is 55–65 °C.

[0010] To achieve the above objectives, the second technical solution of the present invention is as follows: a method for preparing a controllable flocculation-rapid sedimentation water-based cutting fluid for sapphire diamond wire cutting, characterized by including the following steps: Step 1 Add deionized water to the mixing tank and start stirring at 300-500 r / min; Step Two Add cationic polyacrylamide, triethanolamine, and isomeric alcohol polyoxyethylene ether to the solution in step one in sequence, and stir until completely dissolved; Step 3 Slowly add cloud-controllable polyether and ester lubricant, heat to 58-60℃, and perform high-speed shearing at 800-1200 r / min for 32-35 min; Step Four Cool down to below 35°C, add organic molybdenum-boron ester composite extreme pressure agent, bactericide, and defoamer, and continue stirring for 48–55 min (range). Step 5 After standing to defoam and filtering, a transparent or microemulsion cutting fluid is obtained. The pH of the cutting fluid is 8.5–9.5, and the kinematic viscosity at 4°C is 15–35 mm² / s.

[0011] The mass ratio of each component in the above steps is as follows: 8-20% cloud-controllable polyether, 8-15% ester lubricant, 1-5% organic molybdenum-boron ester composite extreme pressure agent, 0.0003-0.015% cationic polyacrylamide, 2-7% isomeric alcohol polyoxyethylene ether, 1-4% triethanolamine, 0.2-1.5% bactericide, 0.05-0.5% defoamer, and the balance being deionized water.

[0012] This technical solution also includes sodium polyaspartate, which is added to deionized water at a mass ratio of 0 to 0.3%.

[0013] In this technical solution, the ester lubricant includes PEG400 dioleate or TMPTO.

[0014] This technical solution also includes a nano-cerium oxide dispersion with a mass ratio of 0.8%, wherein the nano-cerium oxide particle size is 20-50 nm, the boiling point of the cloud point controllable polyether is 55-65℃, and the bactericide is a mixture of BIT and isothiazolinone with a mass ratio of 10:4-1:1.

[0015] In this technical solution, the cationic polyacrylamide has a molecular weight of 12 million to 18 million and an ionicity of 30% to 60%.

[0016] The advantages of this invention compared with the prior art are: the synergistic mechanism of weak dispersion and controlled micro-flocculation of cationic PAM achieves a sedimentation rate of ≥90% for Al2O3 micro powder and diamond chips in 30 min, direct reuse of supernatant, no visible particles on the slice surface, cutting fluid replacement cycle of ≥60 days, diamond wire life of ≥150 km, high-value recovery of waste powder by pressure filtration, and a reduction in overall cutting cost of 28-45%. Detailed Implementation

[0017] The specific embodiments of the present invention will be further described below. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example

[0018] It is a controllable flocculation-rapid sedimentation water-based cutting fluid for sapphire diamond wire cutting and its preparation method, including: 20% cloud-controllable polyether, 8% ester lubricant, 1% organic molybdenum-boron ester composite extreme pressure agent, 0.0003% cationic polyacrylamide, 2% isomeric alcohol polyoxyethylene ether, 1% triethanolamine, 0.2% bactericide, 0.05% defoamer and the balance deionized water.

[0019] The cloud-controllable polyether provides lubrication; the ester lubricant improves the cutting roughness; the organic molybdenum-boron ester composite extreme pressure agent makes the diamond wire less prone to breakage and increases the service life of the diamond wire; the cationic polyacrylamide improves the sedimentation rate; the triethanolamine adjusts the pH value; the bactericide has a bactericidal effect; and the defoamer has a defoaming effect.

[0020] In this embodiment, sodium polyaspartate is also included, wherein the mass ratio of sodium polyaspartate is 0%.

[0021] In this embodiment, the ester lubricant includes PEG400 dioleate or TMPTO.

[0022] In this embodiment, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 10:4.

[0023] In this embodiment, the cationic polyacrylamide has a molecular weight of 18 million and an ionic degree of 60%.

[0024] In this embodiment, a nano-cerium oxide dispersion with a mass ratio of 0.8% is also included, wherein the nano-cerium oxide particles have a diameter of 20 nm, and the boiling point of the cloud point controllable polyether is 55-65°C. Example

[0025] It is a method for preparing a controllable flocculation-rapid sedimentation water-based cutting fluid for sapphire diamond wire cutting, characterized by the following steps: Step 1 Add deionized water to the mixing tank and start stirring at 300 rpm. Step Two Add cationic polyacrylamide, triethanolamine, and isomeric alcohol polyoxyethylene ether to the solution in step one in sequence, and stir until completely dissolved; Step 3 Slowly add cloud-controllable polyether and ester lubricant, heat to 58℃, and shear at 800 r / min for 32 min; Step Four Cool down to below 35°C, add organic molybdenum-boron ester composite extreme pressure agent, bactericide, and defoamer, and continue stirring for 48 minutes; Step 5 After standing to defoam and filtering, the fluid is filtered through a 5µm filter bag to obtain a transparent or microemulsion cutting fluid with a pH of 8.5–9.5 and a kinematic viscosity of 15–35 mm² / s at 4°C.

[0026] The mass ratio of each component in the above steps is 20% cloud-controllable polyether, 8% ester lubricant, 1% organic molybdenum-boron ester composite extreme pressure agent, 0.0003% cationic polyacrylamide, 2% isomeric alcohol polyoxyethylene ether, 1% triethanolamine, 0.2% bactericide, 0.05% defoamer, and the balance being deionized water.

[0027] The cloud-controllable polyether provides lubrication; the ester lubricant improves the cutting roughness; the organic molybdenum-boron ester composite extreme pressure agent makes the diamond wire less prone to breakage and increases the service life of the diamond wire; the cationic polyacrylamide improves the sedimentation rate; the triethanolamine adjusts the pH value; the bactericide has a bactericidal effect; and the defoamer has a defoaming effect.

[0028] In this embodiment, sodium polyaspartate is added to deionized water, and the mass ratio of sodium polyaspartate is 0 to 0.3%.

[0029] In this embodiment, the ester lubricant includes PEG400 dioleate or TMPTO.

[0030] In this embodiment, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 10:4.

[0031] In this embodiment, the cationic polyacrylamide has a molecular weight of 18 million and an ionic degree of 60%.

[0032] In this embodiment, a nano-cerium oxide dispersion with a mass ratio of 0.8% is also included, wherein the nano-cerium oxide particles have a diameter of 20 nm, and the boiling point of the cloud point controllable polyether is 55-65°C. Example

[0033] It is a controllable flocculation-rapid sedimentation water-based cutting fluid for sapphire diamond wire cutting and its preparation method, including: 14% cloud-controllable polyether, 11.5% ester lubricant, 3% organic molybdenum-boron ester composite extreme pressure agent, 0.00765% cationic polyacrylamide, 4.5% isomeric alcohol polyoxyethylene ether, 2.5% triethanolamine, 0.85% bactericide, 0.275% defoamer and the balance deionized water.

[0034] The cloud-controllable polyether provides lubrication; the ester lubricant improves the cutting roughness; the organic molybdenum-boron ester composite extreme pressure agent makes the diamond wire less prone to breakage and increases the service life of the diamond wire; the cationic polyacrylamide improves the sedimentation rate; the triethanolamine adjusts the pH value; the bactericide has a bactericidal effect; and the defoamer has a defoaming effect.

[0035] In this embodiment, sodium polyaspartate is also included, wherein the mass ratio of sodium polyaspartate is 0.15%.

[0036] In this embodiment, the ester lubricant includes PEG400 dioleate or TMPTO.

[0037] In this embodiment, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 2:1.

[0038] In this embodiment, the cationic polyacrylamide has a molecular weight of 15 million and an ionicity of 45%.

[0039] In this embodiment, a nano-cerium oxide dispersion with a mass ratio of 0.8% is also included, wherein the nano-cerium oxide particles have a diameter of 40 nm, and the boiling point of the cloud point controllable polyether is 55-65°C. Example

[0040] It is a method for preparing a controllable flocculation-rapid sedimentation water-based cutting fluid for sapphire diamond wire cutting, characterized by the following steps: Step 1 Add deionized water to the mixing tank and start stirring at 400 rpm. Step Two Add cationic polyacrylamide, triethanolamine, and isomeric alcohol polyoxyethylene ether to the solution in step one in sequence, and stir until completely dissolved; Step 3 Slowly add cloud-controllable polyether and ester lubricant, heat to 59°C, and perform high-speed shearing at 1000 r / min (range) for 33.5 min (range). Step Four Cool down to below 35°C, add organic molybdenum-boron ester composite extreme pressure agent, bactericide, and defoamer, and continue stirring for 51 minutes (range). Step 5 After standing to defoam and filtering, the solution is filtered through a 5 μm filter bag to obtain a transparent or microemulsion cutting fluid with a pH of 8.5–9.5 and a kinematic viscosity of 15–35 mm² / s at 4°C.

[0041] The mass ratio of each component in the above steps is 14% cloud-controllable polyether, 11.5% ester lubricant, 3% organic molybdenum-boron ester composite extreme pressure agent, 0.00765% cationic polyacrylamide, 4.5% isomeric alcohol polyoxyethylene ether, 2.5% triethanolamine, 0.85% bactericide, 0.275% defoamer, and the balance being deionized water.

[0042] The cloud-controllable polyether provides lubrication; the ester lubricant improves the cutting roughness; the organic molybdenum-boron ester composite extreme pressure agent makes the diamond wire less prone to breakage and increases the service life of the diamond wire; the cationic polyacrylamide improves the sedimentation rate; the triethanolamine adjusts the pH value; the bactericide has a bactericidal effect; and the defoamer has a defoaming effect.

[0043] In this embodiment, sodium polyaspartate is added to deionized water, and the mass ratio of sodium polyaspartate is 0 to 0.3%.

[0044] In this embodiment, the ester lubricant includes PEG400 dioleate or TMPTO.

[0045] In this embodiment, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 2:1. In this embodiment, the cationic polyacrylamide has a molecular weight of 15 million and an ionicity of 45%.

[0046] In this embodiment, a nano-cerium oxide dispersion with a mass ratio of 0.8% is also included, wherein the nano-cerium oxide particles have a diameter of 35 nm, and the boiling point of the cloud point controllable polyether is 55-65°C. Example

[0047] It is a controllable flocculation-rapid sedimentation water-based cutting fluid for sapphire diamond wire cutting and its preparation method, including: 8% cloud-controllable polyether, 15% ester lubricant, 5% organic molybdenum-boron ester composite extreme pressure agent, 0.015% cationic polyacrylamide, 7% isomeric alcohol polyoxyethylene ether, 4% triethanolamine, 1.5% bactericide, 0.5% defoamer and the balance deionized water.

[0048] The cloud-controllable polyether provides lubrication; the ester lubricant improves the cutting roughness; the organic molybdenum-boron ester composite extreme pressure agent makes the diamond wire less prone to breakage and increases the service life of the diamond wire; the cationic polyacrylamide improves the sedimentation rate; the triethanolamine adjusts the pH value; the bactericide has a bactericidal effect; and the defoamer has a defoaming effect.

[0049] In this embodiment, sodium polyaspartate is also included, wherein the mass ratio of sodium polyaspartate is 0.3%.

[0050] In this embodiment, the ester lubricant includes PEG400 dioleate or TMPTO.

[0051] In this embodiment, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 1:1.

[0052] In this embodiment, the cationic polyacrylamide has a molecular weight of 12 million and an ionicity of 30%.

[0053] In this embodiment, a nano-cerium oxide dispersion with a mass ratio of 0.8% is also included, wherein the nano-cerium oxide particles have a diameter of 50 nm, and the boiling point of the cloud point controllable polyether is 55-65°C. Example

[0054] It is a method for preparing a controllable flocculation-rapid sedimentation water-based cutting fluid for sapphire diamond wire cutting, characterized by the following steps: Step 1 Add deionized water to the mixing tank and start stirring at 500 r / min; Step Two Add cationic polyacrylamide, triethanolamine, and isomeric alcohol polyoxyethylene ether to the solution in step one in sequence, and stir until completely dissolved; Step 3 Slowly add cloud-controllable polyether and ester lubricant, heat to 60℃, and shear at 1200 r / min (range) for 35 min; Step Four Cool down to below 35℃, add organic molybdenum-boron ester composite extreme pressure agent, bactericide, and defoamer, and continue stirring for 55 minutes (range). Step 5 After standing to defoam and filtering, and then filtering with 5 μm, a transparent or microemulsion cutting fluid was obtained. The pH of the cutting fluid was 8.5–9.5, and the kinematic viscosity at 4°C was 15–35 mm² / s.

[0055] The mass ratio of each component in the above steps is 8% cloud-controllable polyether, 15% ester lubricant, 5% organic molybdenum-boron ester composite extreme pressure agent, 0.015% cationic polyacrylamide, 7% isomeric alcohol polyoxyethylene ether, 4% triethanolamine, 1.5% bactericide, 0.5% defoamer, and the balance being deionized water.

[0056] The cloud-controllable polyether provides lubrication; the ester lubricant improves the cutting roughness; the organic molybdenum-boron ester composite extreme pressure agent makes the diamond wire less prone to breakage and increases the service life of the diamond wire; the cationic polyacrylamide improves the sedimentation rate; the triethanolamine adjusts the pH value; the bactericide has a bactericidal effect; and the defoamer has a defoaming effect.

[0057] In this embodiment, sodium polyaspartate is added to deionized water, and the mass ratio of sodium polyaspartate is 0 to 0.3%.

[0058] In this embodiment, the ester lubricant includes PEG400 dioleate or TMPTO.

[0059] In this embodiment, the bactericide is a mixture of BIT and isothiazolinone in a mass ratio of 1:1.

[0060] In this embodiment, the cationic polyacrylamide has a molecular weight of 12 million and an ionicity of 30%.

[0061] In this embodiment, a nano-cerium oxide dispersion with a mass ratio of 0.8% is also included, wherein the nano-cerium oxide particles have a diameter of 50 nm, and the boiling point of the cloud point controllable polyether is 55-65°C.

[0062] The embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations of these embodiments without departing from the principles and spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A controllable flocculation-rapid sedimentation type water-based cutting fluid for sapphire diamond wire cutting, characterized by The composition comprises the following components by mass ratio: 8-20% of cloud point controllable polyether, 8-15% of ester lubricant, 1-5% of organic molybdenum-borate ester complex extreme pressure agent, 0.0003-0.015% of cationic polyacrylamide, 2-7% of isomeric alcohol polyoxyethylene ether, 1-4% of triethanolamine, 0.2-1.5% of bactericide, 0.05-0.5% of defoaming agent, and the balance of deionized water. The composition further comprises 0-0.3% of polyaspartic acid sodium by mass ratio; the ester lubricant comprises PEG400 dioleate or TMPTO.

2. The controllable flocculation-rapid sedimentation type water-based cutting fluid for sapphire diamond wire cutting according to claim 1, characterized by The bactericide is a mixture of BIT and isothiazolinone, and the mass ratio is 10:4-1:

1.

3. The controllable flocculation-rapid sedimentation type water-based cutting fluid for sapphire diamond wire cutting according to claim 1, characterized in that The cationic polyacrylamide has a molecular weight of 12-18 million and an ionic degree of 30-60%.

4. The controllable flocculation-rapid sedimentation type water-based cutting fluid for sapphire diamond wire cutting according to claim 1, characterized by The composition further comprises 0.8% of nano cerium oxide dispersion liquid by mass ratio, wherein the nano cerium oxide has a particle size of 20-50 nm, the cloud point controllable polyether has a boiling point of 55-65°C, the bactericide is a mixture of BIT and isothiazolinone, and the mass ratio is 10:4-1:

1.

5. The controllable flocculation-rapid sedimentation type water-based cutting fluid for sapphire diamond wire cutting according to claim 1, characterized by The composition comprises the following steps:

6. The method for preparing a controllable flocculation-rapid sedimentation type water-based cutting fluid for sapphire diamond wire cutting according to claim 1, characterized in that Step one Deionized water is added into a liquid preparation tank, and stirring is started at 300-500 r / min. Step two Cationic polyacrylamide, triethanolamine and isomeric alcohol polyoxyethylene ether are sequentially added into the solution of step one, and stirring is continued until complete dissolution. Step three Cloud point controllable polyether and ester lubricant are slowly added, and the temperature is raised to 58-60°C, and high-speed shearing is performed at 800-1200 r / min for 32-35 min. Step four The temperature is lowered to below 35°C, and organic molybdenum-borate ester complex extreme pressure agent, bactericide and defoaming agent are added, and stirring is continued for 48-55 min. Step five After standing and defoaming, the transparent or slightly emulsified cutting fluid is obtained, the pH of the cutting fluid is 8.5-9.5, and the 4°C kinematic viscosity is 15-35 mm² / s. The composition comprises the following components by mass ratio: 8-20% of cloud point controllable polyether, 8-15% of ester lubricant, 1-5% of organic molybdenum-borate ester complex extreme pressure agent, 0.0003-0.015% of cationic polyacrylamide, 2-7% of isomeric alcohol polyoxyethylene ether, 1-4% of triethanolamine, 0.2-1.5% of bactericide, 0.05-0.5% of defoaming agent, and the balance of deionized water. The composition further comprises 0-0.3% of polyaspartic acid sodium by mass ratio.

7. The method for preparing a controllable flocculation-rapid sedimentation type water-based cutting fluid for sapphire diamond wire cutting according to claim 6, characterized in that The ester lubricant comprises PEG400 dioleate or TMPTO.

8. The method for preparing a controllable flocculation-rapid sedimentation type water-based cutting fluid for sapphire diamond wire cutting according to claim 6, characterized in that The composition further comprises 0.8% of nano cerium oxide dispersion liquid by mass ratio, wherein the nano cerium oxide has a particle size of 20-50 nm, the cloud point controllable polyether has a boiling point of 55-65°C, the bactericide is a mixture of BIT and isothiazolinone, and the mass ratio is 10:4-1:

1.

9. The method of claim 6, wherein the water-based cutting fluid is prepared by adding 0.1 to 0.3 parts by weight of the dispersant to 100 parts by weight of the water, and then adding 0.1 to 0.3 parts by weight of the dispersant to the mixture. The cationic polyacrylamide has a molecular weight of 12-18 million and an ionic degree of 30-60%.

10. The method for preparing a controllable flocculation-rapid sedimentation type water-based cutting fluid for sapphire diamond wire cutting according to claim 6, characterized in that The composition further comprises 0.8% of nano cerium oxide dispersion liquid by mass ratio, wherein the nano cerium oxide has a particle size of 20-50 nm, the cloud point controllable polyether has a boiling point of 55-65°C, the bactericide is a mixture of BIT and isothiazolinone, and the mass ratio is 10:4-1:1.