CN102627947A - Preparation method of inorganic thermal insulating powder - Google Patents
Preparation method of inorganic thermal insulating powder Download PDFInfo
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- CN102627947A CN102627947A CN2012100783337A CN201210078333A CN102627947A CN 102627947 A CN102627947 A CN 102627947A CN 2012100783337 A CN2012100783337 A CN 2012100783337A CN 201210078333 A CN201210078333 A CN 201210078333A CN 102627947 A CN102627947 A CN 102627947A
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Abstract
The invention discloses a preparation method of inorganic thermal insulating powder. The method comprises the steps of: 1) adding inorganic powder and aerosil into a mixing tank according to certain proportion for preliminary mixing; and 2) conveying the well mixed powder into a bowl mill or pulverizer for intensive fragmentation, thus forming aerogel modified inorganic thermal insulating powder. The method adopts self-made hydrophobic aerosil to simply treat common thermal insulating powder, which can have obviously increased thermal insulating effect and obviously enhanced hydrophobicity. The whole treatment process is simple and convenient, and has less equipment and manpower investment.
Description
Technical field
The present invention relates to a kind of modification technology, the particularly preparation method of the modification of inorganic heat insulation powder about inorganic powder.
Background technology
The most heat-insulating efficiency of existing inorganic heat insulation powder is poor, and powder is carried out hydrophobic treatment needs great amount of manpower and material resources, causes using the coating or the thermal insulation plate thermal conductivity of existing most of heat-insulating powder system works higher, does not reach heat insulation requirement.Yet,,, be difficult to promote the use of in some field because cost is high though effect of heat insulation can reach requirement if all use the aerosil powder.
Summary of the invention
To the problem and shortage that exists in the prior art; The object of the present invention is to provide a kind of preparation method of inorganic heat insulation powder, this method is used the hydrophobic silica aerogel of oneself producing, with common heat insulation powder simple process; Its effect of heat insulation obviously increases, and hydrophobicity obviously promotes.The entire treatment process is simple and convenient, and equipment, human input are few.
The objective of the invention is to realize through following technical proposals:
A kind of preparation method of inorganic heat insulation powder is characterized in that, this method comprises the steps:
1) inorganic powder is 1 with aerosil according to volume ratio: the ratio of 0.2-1 joins the mixing tank initial stage of carrying out and mixes;
The powder conveying that 2) will mix at the initial stage is carried out the brute force fragmentation in ball mill or kibbler, the time is 10-30 minute, forms the inorganic heat insulation powder of gas gel modification.
Further aspect of the present invention is:
Said inorganic powder is the artificial pearl of wafing, and its loose density is 300g/m
3, the normal temperature thermal conductivity is 0.043w/m.k.
Said aerosil prepares according to following method:
1) be 0.1-1 with tetraethoxy in mass ratio with silicon sol earlier: 1 ratio is mixed in container, is 10-50 according to ethanol and aforementioned mixture quality ratio again: 1 ratio, ethanol is joined in the aforementioned mixture, and obtain mixing solutions;
2) be 5: 1 mixed according to the ammoniacal liquor mass ratio of water and 30% after, this ammonia soln is slowly joined in the aforementioned mixing solutions in the stirring, stir, regulator solution pH value is between 5-7;
3) with step 2) obtain solution left standstill 0.5-1 hour to clear, with gel 4-8 to be aging such as container closure hour;
4) gel after will wearing out moves in the drying plant, in 290-320 ℃, under the 22MPa-23.5MPa condition dry 10-15 hour, both aerosil.
Improvements of the present invention are directly in powder, to add an amount of homemade aerosil, and its thermal conductivity is reduced, and hydrophobic nature increases.The present invention relates to the utilization of aerosil.It is high to have solved common inorganic powder thermal conductivity, and the hydrophobic treatment complicated problems can be handled the problem that common inorganic heat insulation powder exists through this method, is suitable for promoting the use of.
Embodiment
Below in conjunction with specific embodiment the present invention is done further explanation.
Embodiment 1
At first, preparation aerosil:
Being that 0.1: 1 ratio is mixed in container with silicon sol and tetraethoxy in mass ratio earlier, is 10: 1 ratio again according to ethanol and aforementioned mixture quality ratio, and ethanol is joined in the aforementioned mixture, obtains mixing solutions; Be after 5: 1 the mixed, this ammonia soln slowly to be joined in the aforementioned mixing solutions in the stirring according to the ammoniacal liquor mass ratio of water and 30%, stir that regulator solution pH value is 5; With the solution left standstill that obtains 1 hour to clear, with gels to be aging such as container closure 4 hours; Gel after aging is moved in the drying plant, and in 290 ℃, drying is 10 hours under the 22MPa condition, has both got aerosil.
Secondly, prepare inorganic heat insulation powder:
Measure the artificial pearl 500ml that wafts with graduated cylinder, aerosil 100ml, after simple the mixing, the capacity of packing into is in the experiment kibbler of 2000ml in beaker, starts to stir and takes out in 10 minutes, surveying its loose density is 240g/m
3Use the laboratory magnetic stirrer can all be distributed in the water in 30 minutes; Thermal conductivity is 0.037w/m.k.
Embodiment 2
At first, preparation aerosil:
Being that 0.5: 1 ratio is mixed in container with silicon sol and tetraethoxy in mass ratio earlier, is 50: 1 ratio again according to ethanol and aforementioned mixture quality ratio, and ethanol is joined in the aforementioned mixture, obtains mixing solutions; Be after 5: 1 the mixed, this ammonia soln slowly to be joined in the aforementioned mixing solutions in the stirring according to the ammoniacal liquor mass ratio of water and 30%, stir that regulator solution pH value is 6; With the solution left standstill that obtains 1 hour to clear, with gels to be aging such as container closure 6 hours; Gel after aging is moved in the drying plant, and in 300 ℃, drying is 12 hours under the 23.5MPa condition, has both got aerosil.
Secondly, prepare inorganic heat insulation powder:
Measure the artificial pearl 500ml that wafts with graduated cylinder, aerosil 200ml, after simple the mixing, the capacity of packing into is in the experiment kibbler of 2000ml in beaker, starts to stir and takes out in 20 minutes, surveying its loose density is 223g/m
3Use the laboratory magnetic stirrer can all be distributed in the water in two hours; Thermal conductivity is 0.031w/m.k.
Embodiment 3
At first, preparation aerosil:
Being that 1: 1 ratio is mixed in container with silicon sol and tetraethoxy in mass ratio earlier, is 30: 1 ratio again according to ethanol and aforementioned mixture quality ratio, and ethanol is joined in the aforementioned mixture, obtains mixing solutions; Be after 5: 1 the mixed, this ammonia soln slowly to be joined in the aforementioned mixing solutions in the stirring according to the ammoniacal liquor mass ratio of water and 30%, stir that regulator solution pH value is 7; With the solution left standstill that obtains 1 hour to clear, with gels to be aging such as container closure 7 hours; Gel after aging is moved in the drying plant, and in 320 ℃, drying is 15 hours under the 23.5MPa condition, has both got aerosil.
Secondly, prepare inorganic heat insulation powder:
Measure the artificial pearl 500ml that wafts with graduated cylinder, aerosil 300ml, after simple the mixing, the capacity of packing into is in the experiment kibbler of 2000ml in beaker, starts to stir and takes out in 10 minutes, surveying its loose density is 200g/m
3Use the laboratory magnetic stirrer can not be distributed in the water in 2 hours; Thermal conductivity is 0.027w/m.k.
Embodiment 4
At first, preparation aerosil:
Being that 1: 1 ratio is mixed in container with silicon sol and tetraethoxy in mass ratio earlier, is 20: 1 ratio again according to ethanol and aforementioned mixture quality ratio, and ethanol is joined in the aforementioned mixture, obtains mixing solutions; Be after 5: 1 the mixed, this ammonia soln slowly to be joined in the aforementioned mixing solutions in the stirring according to the ammoniacal liquor mass ratio of water and 30%, stir that regulator solution pH value is 7; With the solution left standstill that obtains 1 hour to clear, with gels to be aging such as container closure 8 hours; Gel after aging is moved in the drying plant, and in 290 ℃, drying is 15 hours under the 23.5MPa condition, has both got aerosil.
Secondly, prepare inorganic heat insulation powder:
Measure the artificial pearl 500ml that wafts with graduated cylinder, aerosil 400ml, after simple the mixing, the capacity of packing into is in the experiment kibbler of 2000ml in beaker, starts to stir and takes out in 10 minutes, surveying its loose density is 180g/m
3Use the laboratory magnetic stirrer can not let powder be distributed in the water in 3 hours; Thermal conductivity is 0.025w/m.k.
Embodiment 5
At first, preparation aerosil:
Being that 0.8: 1 ratio is mixed in container with silicon sol and tetraethoxy in mass ratio earlier, is 30: 1 ratio again according to ethanol and aforementioned mixture quality ratio, and ethanol is joined in the aforementioned mixture, obtains mixing solutions; Be after 5: 1 the mixed, this ammonia soln slowly to be joined in the aforementioned mixing solutions in the stirring according to the ammoniacal liquor mass ratio of water and 30%, stir that regulator solution pH value is 7; With the solution left standstill that obtains 1 hour to clear, with gels to be aging such as container closure 4 hours; Gel after aging is moved in the drying plant, and in 320 ℃, drying is 10 hours under the 22MPa condition, has both got aerosil.
Secondly, prepare inorganic heat insulation powder:
Measure the artificial pearl 500ml that wafts with graduated cylinder, aerosil 500ml, after simple the mixing, the capacity of packing into is in the experiment kibbler of 2000ml in beaker, starts to stir and takes out in 30 minutes, surveying its loose density is 160g/m
3Use the laboratory magnetic stirrer can not be distributed in the water in 3 hours; Thermal conductivity is 0.023w/m.k.
Through adding different homemade aerosils in the above-mentioned various embodiment, evidence reduces its thermal conductivity along with the increase of aerosil addition, and hydrophobic nature increases.It is high to have solved common inorganic powder thermal conductivity, the hydrophobic treatment complicated problems.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (3)
1. the preparation method of an inorganic heat insulation powder is characterized in that, this method comprises the steps:
1) inorganic powder is 1 with aerosil according to volume ratio: the ratio of 0.2-1 joins the mixing tank initial stage of carrying out and mixes;
The powder conveying that 2) will mix at the initial stage is carried out the brute force fragmentation in ball mill or kibbler, the time is 10-30 minute, forms the inorganic heat insulation powder of gas gel modification.
2. the preparation method of a kind of inorganic heat insulation powder according to claim 1 is characterized in that, said inorganic powder is the artificial pearl of wafing, and its loose density is 300g/m
3, the normal temperature thermal conductivity is 0.043w/m.k.
3. the preparation method of a kind of inorganic heat insulation powder according to claim 1 is characterized in that, said aerosil prepares according to following method:
1) be 0.1-1 with tetraethoxy in mass ratio with silicon sol earlier: 1 ratio is mixed in container, is 10-50 according to ethanol and aforementioned mixture quality ratio again: 1 ratio, ethanol is joined in the aforementioned mixture, and obtain mixing solutions;
2) be 5: 1 mixed according to the ammoniacal liquor mass ratio of water and 30% after, this ammonia soln is slowly joined in the aforementioned mixing solutions in the stirring, stir, regulator solution pH value is between 5-7;
3) with step 2) obtain solution left standstill 0.5-1 hour to clear, with gel 4-8 to be aging such as container closure hour;
4) gel after will wearing out moves in the drying plant, in 290-320 ℃, under the 22MPa-23.5MPa condition dry 10-15 hour, aerosil.
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| CN201210078333.7A CN102627947B (en) | 2012-03-22 | 2012-03-22 | Preparation method of inorganic thermal insulating powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107325593A (en) * | 2017-06-07 | 2017-11-07 | 常州海瑞纺织品有限公司 | A kind of preparation method of waterproof and heat-insulating powder |
Citations (6)
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|---|---|---|---|---|
| CN1171094A (en) * | 1994-11-23 | 1998-01-21 | 赫彻斯特股份公司 | Composite material containing aerogel, process for manufacturing said material and use thereof |
| WO2004018919A2 (en) * | 2002-08-21 | 2004-03-04 | The Research Foundation Of State University Of New York | Process for enhancing material properties and materials so enhanced |
| CN101195725A (en) * | 2007-12-29 | 2008-06-11 | 株洲时代新材料科技股份有限公司 | Heat-insulating energy-saving paint for vehicle and method for producing the same |
| CN101468907A (en) * | 2007-12-27 | 2009-07-01 | 上海暄洋化工材料科技有限公司 | SiO2 enriched nano composite heat preserving and thermal insulating paste and preparing process thereof |
| CN101468906A (en) * | 2007-12-27 | 2009-07-01 | 上海暄洋化工材料科技有限公司 | SiO2 enriched nano composite inorganic flame-retardant heat insulating thermal preserving board and manufacturing process thereof |
| SK5889Y1 (en) * | 2010-05-26 | 2011-11-04 | Therm Spaniel Group A S Q | Mixture for thin-film, heat-insulating and thermo-reflexive surface finish treatment |
-
2012
- 2012-03-22 CN CN201210078333.7A patent/CN102627947B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1171094A (en) * | 1994-11-23 | 1998-01-21 | 赫彻斯特股份公司 | Composite material containing aerogel, process for manufacturing said material and use thereof |
| WO2004018919A2 (en) * | 2002-08-21 | 2004-03-04 | The Research Foundation Of State University Of New York | Process for enhancing material properties and materials so enhanced |
| CN101468907A (en) * | 2007-12-27 | 2009-07-01 | 上海暄洋化工材料科技有限公司 | SiO2 enriched nano composite heat preserving and thermal insulating paste and preparing process thereof |
| CN101468906A (en) * | 2007-12-27 | 2009-07-01 | 上海暄洋化工材料科技有限公司 | SiO2 enriched nano composite inorganic flame-retardant heat insulating thermal preserving board and manufacturing process thereof |
| CN101195725A (en) * | 2007-12-29 | 2008-06-11 | 株洲时代新材料科技股份有限公司 | Heat-insulating energy-saving paint for vehicle and method for producing the same |
| SK5889Y1 (en) * | 2010-05-26 | 2011-11-04 | Therm Spaniel Group A S Q | Mixture for thin-film, heat-insulating and thermo-reflexive surface finish treatment |
Non-Patent Citations (1)
| Title |
|---|
| FANG HE，等: "Synthesis and properties of silica aerogel by using acid silica sol and TEOS as silicon sources", 《KEY ENGINEERING MATERIALS》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107325593A (en) * | 2017-06-07 | 2017-11-07 | 常州海瑞纺织品有限公司 | A kind of preparation method of waterproof and heat-insulating powder |
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| CN102627947B (en) | 2014-03-26 |
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