CN104497646A - Preparation method of aluminum oxide sol composite slurry - Google Patents
Preparation method of aluminum oxide sol composite slurry Download PDFInfo
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- CN104497646A CN104497646A CN201410714630.5A CN201410714630A CN104497646A CN 104497646 A CN104497646 A CN 104497646A CN 201410714630 A CN201410714630 A CN 201410714630A CN 104497646 A CN104497646 A CN 104497646A
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Abstract
The invention relates to the technical field of conductive coatings and aims at providing a preparation method of aluminum oxide sol composite slurry. The method comprises the following steps of adding a dispersing agent into nanometer aluminum oxide sol, and stirring at the rate of 1000-1200r/min for 10 minutes; then, adding nanometer tin dioxide powder while stirring, and continuing to stir for 0.5 hour; and next, sequentially adding nanometer silver powder and nanometer copper powder, and continuing to stir for 1 hour until the nanometer silver powder and the nanometer copper powder are uniformly dispersed to obtain the aluminum oxide sol composite slurry. The preparation method disclosed by the invention is simple in process; raw materials are relatively low in cost and available; and the large-scale industrial production is easily realized. A conductive coating prepared from the aluminum oxide sol composite slurry has the characteristics of high temperature resistance, hydrophobicity, high conductivity and pollution resistance.
Description
Technical field
The invention belongs to conductive coating technical field, particularly the preparation method of alumina sol compound slip.
Background technology
Conductive coating is that one is applied to non-conductive substrate surface, makes it have the upper layer of conductive capability, can be applicable to the fields such as industry, national defence, electronics such as antirust oil tank, radome.From the 1950's, China just starts independent development conduction related coatings.Electrostatic problem annoyings the industry member of China always, for thoroughly reversing this predicament, in have developed a collection of antistatic conductive electrocoat the earliest at that time, coating coating used mostly is carbon series conductive coating.Since the eighties, the development of the electrically conducting coating field of China is swift and violent, greatly progressive, and the Xie Ming etc. as Kunming Institute of Precious Metals adopts and advanced solidifies atomization technique, and prepare novel silvering copper powder electro-conductive coating, its conductivity is excellent, and volume specific resistance can reach 5.0 × 10
-4Ω cm, even close to the electrically conducting coating of silver system, solves copper oxidizable as conductive filler material simultaneously, the expensive shortcoming of silver system electrically conducting coating, and prospect allows people have an optimistic view of.Meanwhile, some domestic scientific research institutions have also been made large quantifier elimination, and the good coating of conductivity obtained.
But, the conductive coating that current industrial circle is conventional mainly adopts filled-type electrically conducting coating to apply and forms, main film forming substance is wherein mainly high molecular polymer, as epoxy resin, acrylic resin, urethane resin, fluorocarbon resin etc., and add the organism such as a certain amount of coupling agent, softening agent, thickening material, this makes current conductive coating mostly be applied to antistatic field, and conductivity is not enough to meet some and requires higher field, particularly electronic applications to specific conductivity; And current conductive coating mainly uses in normal temperature or the lower environment of temperature, and resistance to elevated temperatures is poor, and easily stains.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiency existed in existing conductive coating technology, provides a kind of preparation method of alumina sol compound slip.The conductive coating utilizing this alumina sol compound slip to obtain has good electroconductibility, high thermal resistance and hydrophobicity.
For technical solution problem, solution of the present invention is:
The invention provides a kind of method preparing alumina sol compound slip, comprise the following steps: dispersion agent is added in nano alumina sol, stir 10 minutes under the stir speed (S.S.) of 1000 ~ 1200r/min; Then add nano tin oxide powder while stirring, continue stirring 0.5 hour; Then adding nano-silver powder and copper nanoparticle successively, continuing stirring 1 little of being uniformly dispersed, obtain alumina sol compound slip; The weight percentage of described each raw material is: nano-stannic oxide 20-50%, nano alumina sol 30-60%, nano-silver powder 5 ~ 10%, copper nanoparticle 10 ~ 30% and dispersion agent 0.5-2%; Wherein, the mass concentration of nano alumina sol is 20 ~ 25%.
In the present invention, the particle diameter of described nano-stannic oxide is 50 ~ 70nm.
In the present invention, in described nano alumina sol, the particle diameter of nano aluminium oxide is 10 ~ 20nm.
In the present invention, the particle diameter of described nano-silver powder is 50 ~ 80nm.
In the present invention, the particle diameter of described copper nanoparticle is 50nm.
In the present invention, described dispersion agent is 120,000 basic sodium sulfonates.
In the present invention, described matrix is cement plate or glass, can select general cement plate for building and glass.
Utilize alumina sol compound Pulp preparation to have the matrix of high temperature resistant hydrophobic conductive coating, comprise the following steps:
(1) adopt spraying method that alumina sol compound slip is sprayed on matrix surface, form the matrix of band coating; Spraying n layer altogether, the thickness of every layer of coating is 10 ~ 20 μm, n >=1;
(2) by the thermal treatment 40 minutes in the High Temperature Furnaces Heating Apparatus of 600 DEG C of the matrix of band coating, then use washed with de-ionized water surface, obtain the matrix with high temperature resistant hydrophobic conductive coating.
Compared with prior art, beneficial effect of the present invention is:
1, preparation technology is simple, and selected material cost is lower, easily obtains, and using the cement plate of routine or glass as matrix, easily can realize large-scale industrial production.
2, adopt the inventive method preparation and the high temperature resistant hydrophobic conductive coating that obtains, after tested, its resistivity can reach 50 μ below Ω cm, and common conductive resistance of coating rate is about 10
2~ 10
4μ Ω cm; Can reach more than 100 degree to the static contact angle of water, the static contact angle of common conductive coating to water is only 50 ~ 90 degree; Can resistance to more than 600 degree high temperature, general only resistance to 200 ~ 400 degree of high temperature of common conductive coating.Therefore the conductive coating utilizing the present invention to prepare has high temperature resistant, hydrophobic, high conductivity, stain resistant characteristic.
Embodiment
Below by example, the present invention is further described.
Alumina sol compound slip in the present invention is mixed by the raw material of following weight percentage: nano-stannic oxide 20-50%, nano alumina sol 30-60%, nano-silver powder 5 ~ 10%, copper nanoparticle 10 ~ 30% and dispersion agent 0.5-2%.
In the present embodiment, the purity that nano-stannic oxide selects Shanghai Jing Chun biochemical technology limited-liability company to produce is the product of 99.99%, and particle diameter is 50 ~ 70nm; The mass concentration that nano alumina sol selects Hefei Xiang positizing Science and Technology Ltd. to produce is the product of 20 ~ 25%, and particle diameter is 10 ~ 20nm; Nano-silver powder is by Silver Nitrate (analytical pure, molecular weight: 169.87, Chemical Reagent Co., Ltd., Sinopharm Group) and glucose (analytical pure, molecular weight: 198.17, Chemical Reagent Co., Ltd., Sinopharm Group) issue raw reduction reaction at 25 DEG C and be prepared from, particle diameter is 50 ~ 80nm; The purity that copper nanoparticle selects Shanghai Jing Chun biochemical technology limited-liability company to produce is the product of 99.9%, and particle diameter is 50nm; Dispersion agent selects 120,000 basic sodium sulfonates, the analytical pure product that Chemical Reagent Co., Ltd., Sinopharm Group produces, and molecular weight is 348.48.
The preparation method of alumina sol compound slip, comprises the following steps:
Dispersion agent is added in nano alumina sol, stir 10 minutes under the stir speed (S.S.) of 1000 ~ 1200r/min; Then add nano tin oxide powder while stirring, continue stirring 0.5 hour; Then adding nano-silver powder and copper nanoparticle successively, continuing stirring 1 little of being uniformly dispersed, obtain alumina sol compound slip.
There is the preparation method of the matrix of high temperature resistant hydrophobic conductive coating, comprise the following steps:
(1) adopt spraying method that alumina sol compound slip is sprayed on matrix surface, form the matrix of band coating; Spraying n layer altogether, the thickness of every layer of coating is 10 ~ 20 μm, n >=1;
(2) by the thermal treatment 40 minutes in the High Temperature Furnaces Heating Apparatus of 600 DEG C of the matrix of band coating, then use washed with de-ionized water surface, obtain the matrix with high temperature resistant hydrophobic conductive coating.
Testing data in each embodiment sees the following form (number of each component is mass fraction):
Finally, it is also to be noted that enumerate above be only specific embodiments of the invention son.Obviously, the invention is not restricted to above examples of implementation, many distortion can also be had.All distortion that those of ordinary skill in the art can directly derive from content disclosed by the invention or associate, all should think protection scope of the present invention.
Claims (7)
1. a preparation method for alumina sol compound slip, is characterized in that, comprises the following steps: added by dispersion agent in nano alumina sol, stirs 10 minutes under the stir speed (S.S.) of 1000 ~ 1200r/min; Then add nano tin oxide powder while stirring, continue stirring 0.5 hour; Then adding nano-silver powder and copper nanoparticle successively, continuing stirring 1 little of being uniformly dispersed, obtain alumina sol compound slip;
The weight percentage of described each raw material is: nano-stannic oxide 20-50%, nano alumina sol 30-60%, nano-silver powder 5 ~ 10%, copper nanoparticle 10 ~ 30% and dispersion agent 0.5-2%; Wherein, the mass concentration of nano alumina sol is 20 ~ 25%.
2. method according to claim 1, is characterized in that, the particle diameter of described nano-stannic oxide is 50 ~ 70nm.
3. method according to claim 1, is characterized in that, in described nano alumina sol, the particle diameter of nano aluminium oxide is 10 ~ 20nm.
4. method according to claim 1, is characterized in that, the particle diameter of described nano-silver powder is 50 ~ 80nm.
5. method according to claim 1, is characterized in that, the particle diameter of described copper nanoparticle is 50nm.
6. method according to claim 1, is characterized in that, described dispersion agent is 120,000 basic sodium sulfonates.
7. method according to claim 1, is characterized in that, described matrix is cement plate or glass.
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| CN201410714630.5A CN104497646B (en) | 2014-11-29 | 2014-11-29 | Preparation method of aluminum oxide sol composite slurry |
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| CN201410714630.5A CN104497646B (en) | 2014-11-29 | 2014-11-29 | Preparation method of aluminum oxide sol composite slurry |
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| CN104497646B CN104497646B (en) | 2017-02-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105503264A (en) * | 2015-11-25 | 2016-04-20 | 浙江大学自贡创新中心 | Method for preparing foam concrete nano reinforcing agent |
| CN109535788A (en) * | 2018-12-18 | 2019-03-29 | 浙江大学自贡创新中心 | Composite nano colloidal sol and preparation method thereof for silver alloy protection |
| CN109651854A (en) * | 2018-12-18 | 2019-04-19 | 浙江大学自贡创新中心 | A kind of preparation method of the composite nano film layer for silver alloy protection |
Citations (4)
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| JP2008127638A (en) * | 2006-11-21 | 2008-06-05 | Nippon Parkerizing Co Ltd | Aqueous surface-treating agent for environment-compatible type precoated metal material, surface-treated metal material, and environment-compatible type precoated metal material |
| CN101805531A (en) * | 2010-02-23 | 2010-08-18 | 浙江大学 | Preparation method of organic-inorganic composite collosol for the surface corrosion prevention of metal aluminum sheet |
| CN102099310A (en) * | 2008-07-17 | 2011-06-15 | 旭硝子株式会社 | Water-repellent substrate and process for production thereof |
| CN102408806A (en) * | 2011-11-03 | 2012-04-11 | 浙江大学 | High-emission transparent heat-insulating paint in atmospheric window regions and preparation method thereof |
-
2014
- 2014-11-29 CN CN201410714630.5A patent/CN104497646B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008127638A (en) * | 2006-11-21 | 2008-06-05 | Nippon Parkerizing Co Ltd | Aqueous surface-treating agent for environment-compatible type precoated metal material, surface-treated metal material, and environment-compatible type precoated metal material |
| CN102099310A (en) * | 2008-07-17 | 2011-06-15 | 旭硝子株式会社 | Water-repellent substrate and process for production thereof |
| CN101805531A (en) * | 2010-02-23 | 2010-08-18 | 浙江大学 | Preparation method of organic-inorganic composite collosol for the surface corrosion prevention of metal aluminum sheet |
| CN102408806A (en) * | 2011-11-03 | 2012-04-11 | 浙江大学 | High-emission transparent heat-insulating paint in atmospheric window regions and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105503264A (en) * | 2015-11-25 | 2016-04-20 | 浙江大学自贡创新中心 | Method for preparing foam concrete nano reinforcing agent |
| CN109535788A (en) * | 2018-12-18 | 2019-03-29 | 浙江大学自贡创新中心 | Composite nano colloidal sol and preparation method thereof for silver alloy protection |
| CN109651854A (en) * | 2018-12-18 | 2019-04-19 | 浙江大学自贡创新中心 | A kind of preparation method of the composite nano film layer for silver alloy protection |
| CN109651854B (en) * | 2018-12-18 | 2020-12-11 | 浙江大学自贡创新中心 | Preparation method of composite nano-film layer for silver alloy protection |
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| CN104497646B (en) | 2017-02-22 |
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