CN101514284B - Method for preparing alkali-resistant magnetic liquid sealing material - Google Patents
Method for preparing alkali-resistant magnetic liquid sealing material Download PDFInfo
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- CN101514284B CN101514284B CN2009100109037A CN200910010903A CN101514284B CN 101514284 B CN101514284 B CN 101514284B CN 2009100109037 A CN2009100109037 A CN 2009100109037A CN 200910010903 A CN200910010903 A CN 200910010903A CN 101514284 B CN101514284 B CN 101514284B
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Abstract
The invention provides a method for preparing an alkali-resistant magnetic liquid sealing material, having the following principal technical characteristics: 1, iron-nickel alloy nano-particles are prepared by a liquid-phase collection method; 2, the method for preparing the alkali-resistant magnetic liquid sealing material comprises the steps of: (1) weighting the iron-nickel alloy nano-particles, perfluoro polyether oil and silicone oil based on formula proportions; (2) putting the weighted perfluoro polyether oil and the silicone oil into a high-pressure reaction kettle for agitating for 90 minutes under the pressure of 1 MPa and at the temperature of 100 DEG C; (3) increasing the pressure in the high-pressure reaction kettle to 2 MPa, raising the temperature to 150 DEG C, and then agitating for 120 minutes; and (4) once the pressure and the temperature in the high-pressure reaction kettle return to normal pressure and room temperature, putting the iron-nickel alloy nano-particles into the high-pressure reaction kettle for agitating for 180 minutes under the pressure of 0.5 MPa and at the temperature of 60 DEG C. The invention has the advantages of no hard contact at sealing parts, no mechanical abrasion, good sealing property and long sealing lifetime.
Description
Technical field:
The present invention relates to the sealing material field, particularly a kind of preparation method who is used for a kind of alkali-resistant magnetic liquid sealing material that the bases medium-tight uses.
Background technology:
Be used at present the sealing material that the bases medium-tight uses both at home and abroad and mostly be carbon-graphite wear ring, silicon nitride wear ring, aluminum oxide wear ring, sintering metal wear ring and teflon seal ring etc.Its shortcoming is, because the sealing position is hard contact, in moving process, because mechanical wear, sealing-gap will become greatly gradually, and leaking gradually increases, and finally causes the sealing failure.And when using alkali-resistant magnetic liquid sealing material, because magnetic fluid sealing is soft seal, there is not mechanical wear in the not hard contact at the sealing position, so good airproof performance, sealing life is long, generally prolongs more than one times sealing life.
Summary of the invention:
The objective of the invention is to the deficiency that exists in the above-mentioned technology, providing a kind of is the preparation method of the acid-resistant magnetic liquid sealing material of main raw material with iron nickel alloy nanoparticle, perfluoro polyether oil and silicone oil.Because alkali-resistant magnetic liquid sealing material is soft seal, there is not mechanical wear in not hard contact at the sealing position, so good airproof performance, sealing life is long, and prolong more than one times general sealing life.
The objective of the invention is to realize like this: it is characterized in that as follows: being that 99.6wt%, nickel content are that the iron nickel alloy rod of 15-75wt% is a raw material with purity 1,, is 5.0 * 10 in total pressure
4Pa-1.0 * 10
5Pa, acetylene gas pressure ratio are to be equipped with the electric arc legal system in the mixed atmosphere of 30% acetylene gas and argon gas; Nanoparticle in preparation room production is collected with mixed gas entering oleic acid liquid, and the median size of the iron nickel alloy nanoparticle of acquisition is the 20-65 nanometer.2, the quality group of alkali-resistant magnetic liquid sealing material becomes: iron nickel alloy nanoparticle 25-60%; Perfluoro polyether oil 30-60%; Silicone oil 8-20%, its preparation method is: the compositing formula ratio in alkali-resistant magnetic liquid sealing material takes by weighing iron nickel alloy nanoparticle, perfluoro polyether oil, silicone oil; Putting into autoclave to the perfluoro polyether oil that weighs up, silicone oil, is that 1MPa, temperature are to stir 90 minutes under 100 ℃ the condition at pressure; Again the pressure in the autoclave be increased to 2MPa, temperature is brought up to 150 ℃, restir 120 minutes; After the pressure and temperature in the autoclave returns to normal pressure and room temperature, put into autoclave to the iron nickel alloy nanoparticle, be that 0.5MPa, temperature are to stir 180 minutes under 60 ℃ the condition at pressure, promptly prepare alkali-resistant magnetic liquid sealing material.
Advantage of the present invention is: alkali-resistant magnetic liquid sealing material is soft seal, and there is not mechanical wear in not hard contact at the sealing position, so good airproof performance, sealing life is long, and prolong more than one times general sealing life.
Embodiment:
Below in conjunction with embodiment the present invention is further specified:
Embodiment 1
Being that 99.6wt%, nickel content are that the iron nickel alloy rod of 70wt% is a raw material with purity, is 5.0 * 10 in total pressure
4Pa, acetylene gas pressure ratio are to be equipped with the electric arc legal system in the mixed atmosphere of 30% acetylene gas and argon gas, get into oleic acid liquid at the nanoparticle of preparation room production with mixed gas and are collected, and the median size of the iron nickel alloy nanoparticle of acquisition is 22 nanometers.
The quality group of alkali-resistant magnetic liquid sealing material becomes: iron-nickel alloy nano particle 30%; Perfluoro polyether oil 55%; Silicone oil 15%, the preparation method is: (1) takes by weighing iron nickel alloy nanoparticle, perfluoro polyether oil, silicone oil in the compositing formula ratio of alkali-resistant magnetic liquid sealing material; (2) putting into autoclave to the perfluoro polyether oil that weighs up, silicone oil, is that 1MPa, temperature are to stir 90 minutes under 100 ℃ the condition at pressure; (3) again the pressure in the autoclave be increased to 2MPa, temperature is brought up to 150 ℃, restir 120 minutes; (4) after the pressure and temperature in the autoclave returns to normal pressure and room temperature; Put into autoclave to the iron nickel alloy nanoparticle; At pressure is that 0.5MPa, temperature are to stir 180 minutes under 60 ℃ the condition, promptly prepares alkali-resistant magnetic liquid sealing material.The performance index of alkali-resistant magnetic liquid sealing material are: viscosity is 8.0 * 10 during room temperature (25 ℃)
4MPas, saturation magnetization is 26Am
2/ kg..
Embodiment 2
Being that 99.6wt%, nickel content are that the iron nickel alloy rod of 50wt% is a raw material with purity, is 7.0 * 10 in total pressure
4Pa, acetylene gas pressure ratio are to be equipped with the electric arc legal system in the mixed atmosphere of 30% acetylene gas and argon gas, get into oleic acid liquid at the nanoparticle of preparation room production with mixed gas and are collected, and the median size of the iron nickel alloy nanoparticle of acquisition is 45 nanometers.
The quality group of alkali-resistant magnetic liquid sealing material becomes: iron-nickel alloy nano particle 40%; Perfluoro polyether oil 50%; Silicone oil 10%, the preparation method is: (1) takes by weighing iron nickel alloy nanoparticle, perfluoro polyether oil, silicone oil in the compositing formula ratio of alkali-resistant magnetic liquid sealing material; (2) putting into autoclave to the perfluoro polyether oil that weighs up, silicone oil, is that 1MPa, temperature are to stir 90 minutes under 100 ℃ the condition at pressure; (3) again the pressure in the autoclave be increased to 2MPa, temperature is brought up to 150 ℃, restir 120 minutes; (4) after the pressure and temperature in the autoclave returns to normal pressure and room temperature; Put into autoclave to the iron nickel alloy nanoparticle; At pressure is that 0.5MPa, temperature are to stir 180 minutes under 60 ℃ the condition, promptly prepares alkali-resistant magnetic liquid sealing material.The performance index of alkali-resistant magnetic liquid sealing material are: viscosity is 9.0 * 10 during room temperature (25 ℃)
4MPas, saturation magnetization is 51Am
2/ kg.
Embodiment 3
Being that 99.6wt%, nickel content are that the iron nickel alloy rod of 25wt% is a raw material with purity, is 1.0 * 10 in total pressure
5Pa, acetylene gas pressure ratio are to be equipped with the electric arc legal system in the mixed atmosphere of 30% acetylene gas and argon gas, get into oleic acid liquid at the nanoparticle of preparation room production with mixed gas and are collected, and the median size of the iron nickel alloy nanoparticle of acquisition is 60 nanometers.
The quality group of alkali-resistant magnetic liquid sealing material becomes: iron-nickel alloy nano particle 50%; Perfluoro polyether oil 40%; Silicone oil 10%, the preparation method is: (1) takes by weighing iron nickel alloy nanoparticle, perfluoro polyether oil, silicone oil in the compositing formula ratio of alkali-resistant magnetic liquid sealing material; (2) putting into autoclave to the perfluoro polyether oil that weighs up, silicone oil, is that 1MPa, temperature are to stir 90 minutes under 100 ℃ the condition at pressure; (3) again the pressure in the autoclave be increased to 2MPa, temperature is brought up to 150 ℃, restir 120 minutes; (4) after the pressure and temperature in the autoclave returns to normal pressure and room temperature; Put into autoclave to the iron nickel alloy nanoparticle; At pressure is that 0.5MPa, temperature are to stir 180 minutes under 60 ℃ the condition, promptly prepares alkali-resistant magnetic liquid sealing material.The performance index of alkali-resistant magnetic liquid sealing material are: viscosity is 1.1 * 10 during room temperature (25 ℃)
5MPas, saturation magnetization is 53Am
2/ kg..
Claims (1)
1. the preparation method of an alkali-resistant magnetic liquid sealing material is characterized in that: by following process step:
(1) the liquid phase collecting method prepares the iron nickel alloy nanoparticle
Being that 99.6wt%, nickel content are that the iron nickel alloy rod of 15-75wt% is a raw material with purity, is 5.0 * 10 in total pressure
4Pa-1.0 * 10
5Pa, acetylene gas pressure ratio are to be equipped with the electric arc legal system in the mixed atmosphere of 30% acetylene gas and argon gas; Nanoparticle in preparation room production is collected with mixed gas entering oleic acid liquid, and the median size of the iron nickel alloy nanoparticle of acquisition is the 20-65 nanometer;
(2) preparation alkali-resistant magnetic liquid sealing material
The quality group of alkali-resistant magnetic liquid sealing material becomes: iron nickel alloy nanoparticle 25-60%; Perfluoro polyether oil 30-60%; Silicone oil 8-20%, its preparation method is: the compositing formula ratio in alkali-resistant magnetic liquid sealing material takes by weighing iron nickel alloy nanoparticle, perfluoro polyether oil, silicone oil; Putting into autoclave to the perfluoro polyether oil that weighs up, silicone oil, is that 1MPa, temperature are to stir 90 minutes under 100 ℃ the condition at pressure; Again the pressure in the autoclave be increased to 2MPa, temperature is brought up to 150 ℃, restir 120 minutes; After the pressure and temperature in the autoclave returns to normal pressure and room temperature, put into autoclave to the iron nickel alloy nanoparticle again, be that 0.5MPa, temperature are to stir 180 minutes under 60 ℃ the condition at pressure, promptly prepare alkali-resistant magnetic liquid sealing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100109037A CN101514284B (en) | 2009-03-27 | 2009-03-27 | Method for preparing alkali-resistant magnetic liquid sealing material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100109037A CN101514284B (en) | 2009-03-27 | 2009-03-27 | Method for preparing alkali-resistant magnetic liquid sealing material |
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| CN101514284A CN101514284A (en) | 2009-08-26 |
| CN101514284B true CN101514284B (en) | 2012-01-25 |
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| CN2009100109037A Expired - Fee Related CN101514284B (en) | 2009-03-27 | 2009-03-27 | Method for preparing alkali-resistant magnetic liquid sealing material |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6261471B1 (en) * | 1999-10-15 | 2001-07-17 | Shiro Tsuda | Composition and method of making a ferrofluid having an improved chemical stability |
| CN1594483A (en) * | 2004-07-05 | 2005-03-16 | 沈阳工业大学 | High viscosity magnetic liquid sealing materials and method for making same |
| CN1923941A (en) * | 2006-08-25 | 2007-03-07 | 沈阳工业大学 | preparation method of acid-resistant magnetic liquid sealing material |
-
2009
- 2009-03-27 CN CN2009100109037A patent/CN101514284B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6261471B1 (en) * | 1999-10-15 | 2001-07-17 | Shiro Tsuda | Composition and method of making a ferrofluid having an improved chemical stability |
| CN1594483A (en) * | 2004-07-05 | 2005-03-16 | 沈阳工业大学 | High viscosity magnetic liquid sealing materials and method for making same |
| CN1923941A (en) * | 2006-08-25 | 2007-03-07 | 沈阳工业大学 | preparation method of acid-resistant magnetic liquid sealing material |
Non-Patent Citations (2)
| Title |
|---|
| 孙维民.电弧法制备纳米粉体的稳定化处理及应用研究.《中国博士学位论文全文数据库工程科技Ⅰ辑》.2009,(第2期),第84页第4～5段. * |
| 孙维民等.高粘度磁性液体的制备研究.《润滑与密封》.2003,(第1期),第20页右栏倒数第1段～第21页右栏倒数第1段. * |
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| CN101514284A (en) | 2009-08-26 |
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