CN104556966A - Preparation method of fumed silica and nanoscale carbon black composite material - Google Patents
Preparation method of fumed silica and nanoscale carbon black composite material Download PDFInfo
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- CN104556966A CN104556966A CN201510058587.6A CN201510058587A CN104556966A CN 104556966 A CN104556966 A CN 104556966A CN 201510058587 A CN201510058587 A CN 201510058587A CN 104556966 A CN104556966 A CN 104556966A
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- carbon black
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Abstract
The invention discloses a preparation method of a fumed silica and nanoscale carbon black composite material. The prepared composite material can be used as a core material of a vacuum insulated panel. According to the composite material, with fumed silica as a main raw material, the compressive strength and the heat-insulating property of the product are improved by adding a short fiber, an opacifying agent and the like; the uniformly dispersed composite material is prepared by a mechanical high-speed mixing method; the effects on the heat-conducting property and the ageing effect of the composite material caused by the nanoscale carbon black as an additive are further researched; a plurality of groups of products are prepared by adjusting the adding amount of the nanoscale carbon black; a test shows that the composite material has the optimal heat-insulating property when the adding amount of the carbon black is 3%-15%, and the heat conductivity coefficient can reach 0.0040-0.0048w/mk. The composite material has the positive effects of being simple in preparation process, cheap and available in used raw materials and suitable for large-scale production, and is mixed by a dry method; the prepared product is excellent and stable in property and good in ageing property; and application energy consumption of household appliances such as refrigerators can be reduced.
Description
Technical field
The present invention relates to heat insulating material technical field, be specifically related to the preparation method of a kind of aerosil/nano carbon black matrix material.
Background technology
Along with the development of human society and the progress of science and technology, the consumption of the energy becomes the growth of geometry multiple, and Development of Novel energy-saving material and equipment are the emphasis that current various countries are studied.Vacuum heat-insulating plate is made up of high-isolation film, porous core, sorbent material, and the board-like material made through vacuum forming technique receives extensive concern due to its ultra-low thermal conductivity.Core wherein as core position forms primarily of materials such as glass fibre, short chopping, silicon-dioxide, wherein using silicon-dioxide as the vacuum heat-insulating plate of core due to lower thermal conductivity, long work-ing life and the advantage such as environmentally friendly and obtain research widely and fast-developing.
As patent CN102976710A discloses a kind of preparation method of nanometer micropore lagging material, be uniformly mixed primarily of nanometer grade silica, infrared light screening agent and increase fiber and other material and form, this preparation method needs at 800 DEG C of sintering 1h, and cost of manufacture is higher.
For another example patent CN102464468B discloses a kind of nanocomposite heat-insulating material and preparation method thereof; be made up of nano silicon oxide, organic fibre, radiation barrier agent and binding agent; when being prepared into vacuum heat-insulating plate; minimum thermal conductivity can reach 0.004-0.005w/mk; this preparation method employs multiple nanometer materials; material cost is higher, is not suitable for large-scale production.
The people such as M.Alam (M.Alam, H.Singh, S.Brunner, C.Naziris.Energy andBuildings.69 (2014) 442-450) prepare pearlstone/aerosil matrix material, and adjust wherein pearlstone content to investigate the change of matrix material heat conductivility, utilize product prepared by this kind of saving cost method, thermal conductivity is minimum reaches 0.0076w/mk, the method can to a certain degree reduce costs, but thermal conductivity is higher, be not suitable for practical application.
Summary of the invention
The object of the present invention is to provide a kind of aerosil/nano carbon black matrix material and be aided with the method for adding fortifying fibre and opalizer and improve the deficiencies in the prior art; namely to provide that a kind of cost is lower, the formula of the simple suitability for scale production of operation and method; meet low thermal conductivity performance again simultaneously, meet customer requirement.
Technical problem to be solved by this invention realizes by the following technical solutions:
A kind of matrix material, is characterized in that, be made up of the component of following weight: aerosil 50-100g, fortifying fibre 5-25g, opalizer 1-5g, nano level carbon black 1-30g;
Prepare a method for above-mentioned matrix material, it is characterized in that, comprise the steps:
(1) first, take 50-100g aerosil and 5-25g fortifying fibre puts into closed type compounding machine, stir, wherein fortifying fibre is: the short chopping of polypropylene, polyester staple fiber, glass chopped silks etc. are one or several mixtures wherein;
(2) weigh 1-5g opalizer to add in the material in the step (1) stirred, wherein opalizer is not: wherein one or several mixtures such as nano zine oxide, nano-titanium oxide, nano zirconium dioxide;
(3) weighing 1-30g nano level carbon black adds in the material in step (2) as properties-correcting agent, and rapid stirring 5-40min in mixer, forms finely dispersed matrix material;
(4) load the matrix material be stirred in step (3) with the non-woven bag cut in advance, and form the aerosil/nano carbon black matrix material as core material of vacuum heat insulation plate by floating, compression moulding etc.
The matrix material of described preparation has low thermal conductivity, and when internal vacuum is 0.04-10pa, the thermal conductivity of product is minimum reaches 0.0045-0.0056w/mk.
Described matrix material of preparing has good aging effect, under 40-90 DEG C, 60-90%RH, only increases 0.0004-0.0012w/mk after aging 10-60 days.
In described step (3), rapid stirring method prepares the high-speed stirring speed of uniform matrix material is 100-500rpm, and churning time is 5-40min.
The specific surface area of the matrix material of the described nano level carbon black by interpolation is 40-200m2/g.
Described matrix material utilizes non-woven fabrics to pre-install, dry, vacuumize shaping after can be used as vacuum heat-insulating plate core use.
The present invention adopts aerosil as material of main part, is aided with fortifying fibre, opalizer, and the heat conductivility of product is adjusted by changing the content adding carbon black, because aerosil accounts for the major part of matrix material, add filler less and cheap, be applicable to mass production.
The invention has the beneficial effects as follows:
1) using aerosil as body material, by adding a small amount of fortifying fibre and opalizer, stirred by dry method method for mixing, then shaping with non-woven fabrics pack, this method makes simple, and plant and instrument is common, is applicable to large-scale production.
2) in batching, add nano level carbon black, and by adjustment content of carbon black, find minimum thermal conductivity, have and can reduce radiative transfer adding of laminated structure carbon black, improve heat-proof quality, meanwhile, can by the specific surface area of matrix material by 5-50m
2/ g is increased to 40-200m
2/ g, strengthens aging of product performance, improves work-ing life, has great application prospect in vacuum heat-insulating plate.
3) matrix material is prepared or other related science field has well potential using value at physical method.
Accompanying drawing explanation
Fig. 1 is the stereoscan photograph of the nano level carbon black that matrix material of the present invention adds;
Fig. 2 is the specific surface area contrast that matrix material of the present invention adds the nano carbon black of 3%;
Fig. 3 is that matrix material of the present invention adds carbon black and the matrix material Data Comparison not adding carbon black.
Embodiment
The technique means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
Embodiment 1
Weigh 80g aerosil in closed type compounding machine, open stirrer, and to set stirring velocity be 150rpm, weighing 15g diameter is 9 μm, length be the short chopping of polyester of 9mm in agitator, stir 10min, mix to both.Continue to add 2g opalizer, adjustment stirring velocity is 300rpm, continues to stir 30min and forms uniform nano composite material.Loading this matrix material with the non-woven bag cutting certain specification in advance, by shakeouing, compression moulding, forming vacuum heat-insulating plate finally by oven dry and evacuation process.
Embodiment 2:
Weigh 80g aerosil in closed type compounding machine, open stirrer, and to set stirring velocity be 150rpm, weighing 15g diameter is 9 μm, length be the short chopping of polyester of 9mm in agitator, stir 10min, mix to both.Continue to add 2g opalizer and 1g nano carbon black, adjustment stirring velocity is 300rpm, continues to stir 30min and forms uniform nano composite material.Loading this matrix material with the non-woven bag cutting certain specification in advance, by shakeouing, compression moulding, forming vacuum heat-insulating plate finally by oven dry and evacuation process.
Embodiment 3:
Weigh 80g aerosil in closed type compounding machine, open stirrer, and to set stirring velocity be 150rpm, weighing 15g diameter is 9 μm, length be the short chopping of polyester of 9mm in agitator, stir 10min, mix to both.Continue to add 2g opalizer and 3g nano carbon black, adjustment stirring velocity is 300rpm, continues to stir 30min and forms uniform nano composite material.Loading this matrix material with the non-woven bag cutting certain specification in advance, by shakeouing, compression moulding, forming vacuum heat-insulating plate finally by oven dry and evacuation process.
Embodiment 4:
Weigh 80g aerosil in closed type compounding machine, open stirrer, and to set stirring velocity be 150rpm, weighing 15g diameter is 9 μm, length be the short chopping of polyester of 9mm in agitator, stir 10min, mix to both.Continue to add 2g opalizer and 5g nano carbon black, adjustment stirring velocity is 300rpm, continues to stir 30min and forms uniform nano composite material.Loading this matrix material with the non-woven bag cutting certain specification in advance, by shakeouing, compression moulding, forming vacuum heat-insulating plate finally by oven dry and evacuation process.
With reference to figure 1-3, the present invention adjusts the heat conductivility of product by adding nano carbon black, nano level carbon black has laminated structure and can effectively reflect and absorb natural light, infrared light, reduce the radiative transfer of product, thus reduce the thermal conductivity of material, improve heat-proof quality; Meanwhile, nano level carbon black has very large specific surface area (>=500m
2/ g), product specific surface area can be increased when joining in matrix material, thus more gas can be absorbed, reduce product to the susceptibility of air pressure inside, improve aging resistance, increase work-ing life.
Table 1 is the thermal conductivity table by adding different amount nano carbon black matrix material
Table 1
Table 2 contrasts with the matrix material aging data (mw/mk) not adding carbon black for adding carbon black
Table 2
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (8)
1. a preparation method for aerosil, nano level carbon black composite material, is characterized in that, comprise the steps:
1) first, take 50-100g aerosil and 5-25g fortifying fibre puts into closed type compounding machine, stir, wherein fortifying fibre is: the short chopping of polypropylene, polyester staple fiber, and glass chopped silk is one or several mixtures wherein;
2) weigh 1-5g opalizer to add in the material stirred in step (1), wherein opalizer is: nano zine oxide, nano-titanium oxide, nano zirconium dioxide be one or several mixtures wherein;
3) weighing 1-30g nano level carbon black adds wherein as properties-correcting agent, stirs 5-40min, form finely dispersed matrix material in mixer high speed;
4) load the matrix material be stirred in step (3) with the non-woven bag cut in advance, and form the aerosil/nano carbon black matrix material as core material of vacuum heat insulation plate by floating, compression moulding.
2. the preparation method of a kind of aerosil according to claim 1, nano level carbon black composite material, is characterized in that: the primary particle diameter of described aerosil is 5-40nm.
3. the preparation method of a kind of aerosil according to claim 1, nano level carbon black composite material, is characterized in that: the length of described fortifying fibre is 3-15mm, and diameter is 5-20 μm.
4. the preparation method of a kind of aerosil according to claim 1, nano level carbon black composite material, is characterized in that: described high-speed stirring speed is 100-500rpm.
5. the preparation method of a kind of aerosil according to claim 1, nano level carbon black composite material, is characterized in that: described matrix material is the one in white, grey or canescence.
6. the preparation method of a kind of aerosil according to claim 1, nano level carbon black composite material, is characterized in that: the specific surface area of described matrix material is 40-200m
2/ g.
7. the preparation method of a kind of aerosil according to claim 1, nano level carbon black composite material, is characterized in that: the thermal conductivity of described matrix material is 0.0045-0.0056w/mk.
8. the preparation method of a kind of aerosil according to claim 1, nano level carbon black composite material, is characterized in that: described matrix material can be used as core and is applied in vacuum heat-insulating plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510058587.6A CN104556966A (en) | 2015-02-04 | 2015-02-04 | Preparation method of fumed silica and nanoscale carbon black composite material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109114363A (en) * | 2018-10-23 | 2019-01-01 | 四川零零昊科技有限公司 | A kind of composite core material and preparation method thereof applied to vacuum heat-insulating plate |
| EP3604652A1 (en) | 2018-07-31 | 2020-02-05 | Lenzing Aktiengesellschaft | Nonwoven fabric, use of the nonwoven fabric and wipe, dryer cloth and face mask containing the nonwoven fabric |
| WO2020057836A1 (en) | 2018-09-20 | 2020-03-26 | Arcelik Anonim Sirketi | A core material compound, a vacuum insulation panel and a cooling device |
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| US4397901A (en) * | 1979-07-31 | 1983-08-09 | Warren James W | Composite article and method of making same |
| CN102603348A (en) * | 2012-03-14 | 2012-07-25 | 刘相红 | Nano-pore heat-insulation material and manufacturing method thereof |
| CN102729316A (en) * | 2012-07-10 | 2012-10-17 | 袁江涛 | Preparation method of vacuum heat insulating plate |
| CN102838342A (en) * | 2012-09-27 | 2012-12-26 | 袁江涛 | Dry preparation method of high-temperature resistant nanometer micropore thermal insulation board |
-
2015
- 2015-02-04 CN CN201510058587.6A patent/CN104556966A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4397901A (en) * | 1979-07-31 | 1983-08-09 | Warren James W | Composite article and method of making same |
| CN102603348A (en) * | 2012-03-14 | 2012-07-25 | 刘相红 | Nano-pore heat-insulation material and manufacturing method thereof |
| CN102729316A (en) * | 2012-07-10 | 2012-10-17 | 袁江涛 | Preparation method of vacuum heat insulating plate |
| CN102838342A (en) * | 2012-09-27 | 2012-12-26 | 袁江涛 | Dry preparation method of high-temperature resistant nanometer micropore thermal insulation board |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3604652A1 (en) | 2018-07-31 | 2020-02-05 | Lenzing Aktiengesellschaft | Nonwoven fabric, use of the nonwoven fabric and wipe, dryer cloth and face mask containing the nonwoven fabric |
| WO2020025440A1 (en) | 2018-07-31 | 2020-02-06 | Lenzing Aktiengesellschaft | Nonwoven material, use of the nonwoven material, and wiping cloth, drying cloth and face mask containing the nonwoven material |
| WO2020057836A1 (en) | 2018-09-20 | 2020-03-26 | Arcelik Anonim Sirketi | A core material compound, a vacuum insulation panel and a cooling device |
| CN109114363A (en) * | 2018-10-23 | 2019-01-01 | 四川零零昊科技有限公司 | A kind of composite core material and preparation method thereof applied to vacuum heat-insulating plate |
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Owner name: CHUZHOU YINXING NEW MATERIAL CO., LTD. Free format text: FORMER OWNER: CHUZHOU YINXING ELECTRIC CO., LTD. Effective date: 20150819 |
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Effective date of registration: 20150819 Address after: 239300 Chuzhou Development Zone, Anhui Century Avenue South, east of Suzhou Road Applicant after: CHUZHOU YINXING NEW MATERIAL COMPANY Address before: 239000 No. 666 Ziwei South Road, Anhui, Chuzhou Applicant before: Chuzhou Yinxing Electric Co.,Ltd. |
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Application publication date: 20150429 |