CN105367032B - A kind of preparation method of nano thermal insulation plate - Google Patents
A kind of preparation method of nano thermal insulation plate Download PDFInfo
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- CN105367032B CN105367032B CN201510700353.7A CN201510700353A CN105367032B CN 105367032 B CN105367032 B CN 105367032B CN 201510700353 A CN201510700353 A CN 201510700353A CN 105367032 B CN105367032 B CN 105367032B
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Abstract
The invention provides a kind of preparation method of nano thermal insulation plate, including, silicon dioxide aerogel powder and infrared shielding agent, chopped strand are mixed to form mixture, positive silicate solution is sprayed on mixture with spray pattern, the moistening material of gained is shaped to sheet material, the sheet material is conserved and drying process through ammonia again, warming plate is made.Positive silicate solution is sprayed on mixture by the preparation method of the present invention by using the mode of spraying, and the nano-porous structure of aeroge is remained to greatest extent, it is ensured that final obtained warming plate possesses insulation heat-insulating property well；And the preparation method of the present invention realizes the chemical crosslinking between warming plate internal particle by ammonia maintenance processing, greatly improves the mechanical strength of nano thermal insulation plate.
Description
Technical field
The present invention relates to nanometer heat insulating material technical field, and in particular to a kind of using silicon dioxide aerogel powder as filling
The preparation method of the nano thermal insulation plate of material.
Background technology
With the fast development of economic globalization, the mankind are drastically risen for the demand of the energy, the energy profit of extensive style
Increasingly it is difficult in adapt to increasingly serious Energy situation with mode, how improves energy utilization rate, reduction energy consumption turns into the world
The key subjects of various countries' research.Particularly in China, the energy of the industry such as generating, metallurgical smelting, petrochemical industry, architectural pottery disappears
Consumption is more of the same trade than developed country high 2-5 times, and universal this low present situation of energy utilization rate directly affects national economy can
The paces of sustained and rapid development.
In general, the energy-conservation Canal Base in industrial production is originally divided into three major types：The first kind is advanced technical matters stream
Journey；Equations of The Second Kind is advanced superior production equipment；3rd class is excellent energy-saving material.For energy-saving material, thermal insulation separation
Hot material is the major class wherein studied and be most widely used.According to the difference of material, heat preserving and insulating material again can be further
It is divided into organic thermal insulation materials, inorganic heat-insulating material and metal heat insulation material, wherein, conventional inorganic heat-insulating material is mainly at present
It is that aperture made by raw material concentrates on several microns to several millimeters of micropore ceramics with ceramic fibre, whisker, ceramic hollow ball etc.
Material, the normal temperature thermal conductivity factor of this material is typically larger than 0.04W/ (mK), and its heat-proof quality is far from meeting effectively insulating
The demand of the field such as industry such as Aeronautics and Astronautics, ship.In order to reduce the thermal conductivity factor of material, the heat-proof quality of material is improved, is needed
Further reduce the aperture size of material on the basis of there are enough porositys ensureing material.
With the development of nanometer technology, aerogel material comes out, and it is a kind of nanoporous light material of structure-controllable,
99% composition is made up of gas so that aeroge, which turns into, is currently known quality most light solid matter, while being also inorganic
The minimum material of adiabatic field thermal conductivity.Especially aerosil, its thermal conductivity at normal temperatures and pressures is 0.012-
0.015W/ (mK), far below common inorganic heat-insulating material.But the mechanical strength of pure aerosil is low, poor toughness,
Cause the less stable of scantling, also limit its operability in construction.Therefore, silica gas how is improved
The mechanical property of gel rubber material, is the important directions studied at this stage.
Chinese patent literature CN101628804A discloses a kind of preparation method of aerogel heat-insulating composite material, including,
Tetraethyl orthosilicate, absolute ethyl alcohol, deionized water, hydrochloric acid are made into Ludox in molar ratio at 1: 10: 3: 0.015, above-mentioned 8% is added
Silica aerogel powder, 3% titanium dioxide, 10% kaolin and 8% alumina silicate fibre, it is 1% then to add concentration
Ammoniacal liquor, be molded using pouring technology, juxtaposition aging 120 hours at room temperature carry out constant pressure and dry, that is, unit weight, which is made, is
300kg/m3, thermal conductivity is 0.05W/ (mK) heat insulation composite material under normal temperature.Above-mentioned technology by aerosil with
Kaolin, alumina silicate fibre are used cooperatively, and using the cementation of Ludox, then be molded by pouring technology, be conducive to carrying
The mechanical strength of high material.
But in the above-described techniques, due to Ludox this liquid material composition usage amount relative to aerosil powder,
The solid type composition such as titanium dioxide, kaolin, alumina silicate fibre, accounts for the 50-70% of total weight of material, then when solid type composition
When being mixed with liquid material composition, ethanol, water equal solvent in Ludox can largely enter in the nano-pore of aeroge, be done in follow-up
In dry processing procedure, these solvents can be evaporated from the hole of aeroge again, and solvent volatilization when solvent surface tension
The micro-structural of nanoporous aerogel powder can be destroyed, the space for ultimately resulting in material caves in, density increase, so as to cause heat insulation property
It can decline, therefore, above-mentioned prior art is difficult to prepare the more preferable heat-insulating material of heat-proof quality.In addition, dioxy in above-mentioned technology
The consumption accounting of SiClx aeroge is too low, is equally difficult to prepare the more preferable nano thermal insulation plate of heat-insulating property.Therefore, it is how right
The raw material proportioning and preparation method of nano thermal insulation plate of the prior art are improved to overcome above-mentioned technological deficiency, are still this
A field technical barrier urgently to be resolved hurrily.
The content of the invention
Technical problem solved by the invention is that nano thermal insulation plate of the prior art can not have that heat-proof quality is good and machine concurrently
This high defect of tool intensity, and then provide that a kind of thermal and insulating performance is good and preparation of nano thermal insulation plate of high mechanical strength
Method.
Therefore, the present invention realizes that the technical scheme of above-mentioned purpose is：
A kind of preparation method of nano thermal insulation plate, comprises the following steps：
Blend step：It is 1: (0.1- in mass ratio by silicon dioxide aerogel powder and infrared shielding agent, chopped strand
0.5): the ratio of (0.01-0.1) is well mixed, mixture is formed；
The preparation process of positive silicate solution：In the presence of acid catalyst, by esters of silicon acis and hydromassage that than being 1: (18-
36) ratio mixing, stirring is lower to be reacted, and the pH value of control reaction system is less than 3, stands, produces positive silicate solution；
Moistening step：The positive silicate solution is sprayed to the mixture under stirring in the way of spraying
On, obtain moistening material；The addition of the positive silicate solution is not more than the 20% of the quality of the mixture；
Forming step：The moistening material is shaped to sheet material；
Curing step：In ammonia atmosphere, maintenance processing is carried out to the sheet material, maintenance plate is obtained；
Drying steps：Processing is dried to the maintenance plate, that is, nano thermal insulation plate is made.
The particle diameter of the silicon dioxide aerogel powder is 500-1200 mesh, and aperture is 20-50nm.
The outer smoke agent for shielding of fibre is nanometer zirconium silicate, nano zircite, superfine titanium white, vacuum ceramic microballoon, nano oxygen
Change the one or more in iron or nano aluminium oxide；The granularity of wherein described superfine titanium white is 0.1-0.5 microns.
The chopped strand is PET, glass fibre, basalt fibre, alumina silicate fibre, high silica fiber or not come
One or more in mineral wool, the length of the chopped strand is 6-30mm.
H in the acid catalyst+Molar concentration be 0.2mol/L；H in the acid catalyst+With the esters of silicon acis
Mol ratio is (0.025-0.2): 5.
The esters of silicon acis is one kind or several in methyl silicate, tetraethyl orthosilicate, positive silicic acid propyl ester or butyl silicate
Kind.
In the moistening step, the rotating speed for stirring the mixture is 200-800r/min.
The ratio between density of the mixture and the sheet material is (2.5-3.5): 1.
In the preparation process of the positive silicate solution, 12-48h is stood；
In the curing step, conserve 24 hours；
In the drying steps, temperature is 150-300 DEG C, and the time is 24 hours.
In the moistening step, in addition to, before the positive silicate solution is added, by binding agent in the way of spraying
Add into the mixture；
The binding agent is aluminium dihydrogen phosphate aqueous solution and/or Ludox, and the pH value of the binding agent is less than 3；Described
The mass content of aluminium dihydrogen phosphate is 66.7% in aluminium dihydrogen phosphate aqueous solution；The matter of the aluminium dihydrogen phosphate and the Ludox
Amount is than being 3: 1.
The above-mentioned technical proposal of the present invention has the following advantages that：
1st, the preparation method for the nano thermal insulation plate that the present invention is provided, is protected using aerosil as preparation initiatively
The primary raw material of warm plate, aeroge and infrared shielding agent, chopped strand are mixed to form mixture.The addition energy of fine outer smoke agent for shielding
It is produced the compound of molecular level with aerosil, promote aeroge to give full play to its nano-porous structure to solid
The good barrier effect that heat transfer and cross-ventilation conduct heat, while can effectively obstruct infrared radiation heat transfer again；Chopped strand has knot
Structure humidification, is conducive to improving mechanical strength of the warming plate in each dimension.
Positive silicate solution is sprayed to solid type powder shaped by the preparation method of the present invention by the way of spraying initiatively
Mixture on, enable positive silicate solution to soak the mixture just by being stirred continuously, then follow-up ammonia support
During shield, contained activity hydroxy can occur dehydration condensation and form three in the positive silicic acid molecule on mixture surface
Tie up the silicon dioxide skeleton structure of cubic network so that silicon dioxide aerogel powder can be filled up completely with the skeleton, from
Without being only that the compressing of substantial amounts of silicon dioxide aerogel powder provides possibility, it is often more important that also greatly improve
The mechanical property of warming plate.Also, the moistening material that the present invention is formed with spray pattern wet mix is only capable of reaching that part is full
And state, it can so prevent a large amount of solvents from entering in the nano-pore of aerosil, to avoid porous knot in drying process
Structure caves in, so as to effectively ensure that as the insulation heat-insulating property of the nano thermal insulation plate obtained by aeroge is inserts.To sum up,
Positive silicate solution is sprayed on mixture by the preparation method of the present invention by using the mode of spraying, is remained to greatest extent
The nano-porous structure of aerosil, so that it is guaranteed that final obtained warming plate possesses good insulation heat-insulating property.
Meanwhile, the sheet material being molded by moistening material is placed in progress maintenance processing in ammonia by preparation method of the invention first,
Water in sheet material absorbs ammonia and produces hydroxide ion, and dehydrating condensation occurs for the activity hydroxy on itself and aerosil surface
Reaction, realizes the chemical crosslinking between warming plate internal particle, the internal structure power of warming plate is considerably increased, so that greatly
Improve the mechanical strength of warming plate.Thus, preparation method perfection of the invention solves prior art by silica airsetting
Warming plate prepared by glue can not have good and high mechanical strength the defect of thermal and insulating performance concurrently.
2nd, the preparation method of nano thermal insulation plate that the present invention is provided, by using aerosil as preparing warming plate
Primary raw material, for fiber, kaolin, because silica aerogel powder is produced as aerogel composite
During subsidiary product, its specification is difficult to unification, and fragility is high, it is easy to produce airborne dust, is all directly by discarded object in the past
Processing, thus price is very cheap, advantageously reduces the production cost of warming plate.
3rd, the preparation method for the nano thermal insulation plate that the present invention is provided, limits the particle diameter of silicon dioxide aerogel powder as 500-
1200 mesh, are advantageously implemented interparticle point contact, increase the density of warming plate, so as to further improve its mechanical strength.
4th, the preparation method for the nano thermal insulation plate that the present invention is provided, before positive silicate solution is added, in the way of spraying
Binding agent is sprayed on mixture, and preferred binder is aluminium dihydrogen phosphate aqueous solution and/or Ludox；By using spraying
Binding agent is evenly distributed between the particle of mixture by mode, effectively realizes above-mentioned intergranular physical bond；With positive silicon
Acid is engaged in the chemical crosslinking that ammonia is conserved formed in processing procedure so that preparation method of the invention can be further
Ground enhances the mechanical strength of warming plate.
Embodiment
The preparation method of nano thermal insulation plate provided by the present invention is described in detail with reference to specific embodiment.
In following embodiments, wt% represents weight/mass percentage composition.
Embodiment 1
The preparation method of nano thermal insulation plate described in the present embodiment, comprises the following steps：
(1) the silica aerogel particles 10kg for taking aperture to be 20-30nm, is ground into the powder of 500-700 mesh；
The short glass fiber 0.2kg that superfine titanium white 3kg, length that particle diameter is 0.1-0.5 micron are 6-10mm is added thereto, it is mixed
Conjunction is formed uniformly mixture；
(2) tetraethyl orthosilicate 1kg is taken, is added water about 2kg for 1: 18 ratio in the mol ratio of tetraethyl orthosilicate and water, then is added
Enter 0.1mol/L dilution heat of sulfuric acid 0.5L, stirring 30min is reacted and controls the pH value of reaction system to be less than 3, stands 30
Hour, positive silicate solution is made；
(3) mixture is stirred with 500r/min, will just for 0.2: 1 ratio in the mass ratio of positive silicate solution and mixture
Silicate solution is sprayed on mixture in the way of spraying with the uniform wet mixture, obtains moistening material；
(4) with hydraulic test by moistening material in dry powder loose thickness: compacted density=3.5: 1 ratio system
Plate；
(5) obtained sheet material is placed in the fog room for being connected with ammonia, maintenance processing 24 hours obtains maintenance plate；
(6) rest backplate to be placed in high temperature kiln, drying process 24 hours at 150 DEG C of constant temperature, nano thermal insulation plate is made.
Embodiment 2
The preparation method of nano thermal insulation plate described in the present embodiment, comprises the following steps：
(1) the silica aerogel particles 10kg for taking aperture to be 30-50nm, is ground into the powder of 1000-1200 mesh
Body；The chopped mullite fiber 0.3kg that Nano-sized Ferric Oxide Powder 4kg, length are 10-20mm is added thereto, is well mixed and is formed
Mixture；
(2) methyl silicate 1kg is taken, is added water about 2.1kg for 1: 20 ratio in the mol ratio of methyl silicate and water, then
0.2mol/L dilute hydrochloric acid solution 0.8L is added, stirring 30min is reacted and controls the pH value of reaction system to be less than 3, stood
12 hours, positive silicate solution is made；
(3) mixture is stirred with 200r/min, will just for 0.1: 1 ratio in the mass ratio of positive silicate solution and mixture
Silicate solution is sprayed on mixture in the way of spraying with the uniform wet mixture, obtains moistening material；
(4) with hydraulic test by moistening material in dry powder loose thickness: compacted density=3: 1 ratio carries out making sheet；
(5) obtained sheet material is placed in the fog room for being connected with ammonia, maintenance processing 24 hours obtains maintenance plate；
(6) rest backplate to be placed in high temperature kiln, microwave drying 24 hours at 200 DEG C, nano thermal insulation plate is made.
Embodiment 3
The preparation method of nano thermal insulation plate described in the present embodiment, comprises the following steps：
(1) the silica aerogel particles 10kg for taking aperture to be 25-40nm, is ground into the powder of 600-1000 mesh
Body；The chopped PET 0.3kg that nano aluminium oxide 5kg, length are 15-30mm is added thereto, is well mixed and is formed mixing
Thing；
(2) butyl silicate 1kg is taken, is added water about 2.1kg for 1: 19 ratio in the mol ratio of butyl silicate and water, then
0.2mol/L dilute nitric acid solution 1L is added, stirring 30min is reacted and controls the pH value of reaction system to be less than 3, stands 48
Hour, positive silicate solution is made；
(3) aluminium dihydrogen phosphate: Ludox is pressed: the mass ratio of water is 3: 1: 1.5 proportioning, by aluminium dihydrogen phosphate 1.2kg, silicon
Colloidal sol 0.4kg, water 0.6kg are mixed, and the pH value for material of being sized mixing after stirring obtains binding agent to 2.5-3.0；
(4) mixture is stirred with 800r/min, be successively sprayed to binding agent, positive silicate solution by the way of spraying mixed
By mixture uniform wet, to obtain moistening material on compound；
(5) with hydraulic test by moistening material in dry powder loose thickness: compacted density=2.5: 1 ratio system
Plate；
(6) obtained sheet material is placed in the fog room for being connected with ammonia, maintenance processing 24 hours obtains maintenance plate；
(7) rest backplate to be placed in high temperature kiln, drying process 24 hours at 300 DEG C, nano thermal insulation plate is made.
Embodiment 4
The preparation method of nano thermal insulation plate described in the present embodiment, comprises the following steps：
(1) the silica aerogel particles 10kg for taking aperture to be 30-40nm, is ground into the powder of 800-1200 mesh
Body；The chopped alumina silicate fibre 1kg that nanometer zirconium silicate 1kg, length are 20-30mm is added thereto, is well mixed and is formed mixing
Thing；
(2) positive silicic acid propyl ester 1kg is taken, is added water about 4.2kg for 1: 36 ratio in positive silicic acid propyl ester and the mol ratio of water, then
0.2mol/L dilute hydrochloric acid solution 0.125L is added, stirring 30min is reacted and controls the pH value of reaction system less than 3, quiet
Put 24 hours, positive silicate solution is made；
(3) aluminium dihydrogen phosphate 1.2kg and water 0.6kg is mixed, the pH value for material of being sized mixing after stirring is not more than 3.0, obtained
Binding agent；
(4) mixture is stirred with 600r/min, be successively sprayed to binding agent, positive silicate solution by the way of spraying mixed
By mixture uniform wet, to obtain moistening material on compound；
(5) with hydraulic test by moistening material in dry powder loose thickness: compacted density=2.5: 1 ratio system
Plate；
(6) obtained sheet material is placed in the fog room for being connected with ammonia, maintenance processing 24 hours obtains maintenance plate；
(7) rest backplate to be placed in high temperature kiln, drying process 24 hours at 225 DEG C, nano thermal insulation plate is made.
Embodiment 5
The preparation method of nano thermal insulation plate described in the present embodiment, comprises the following steps：
(1) the silica aerogel particles 10kg for taking aperture to be 25-40nm, is ground into the powder of 850-1000 mesh
Body；The chopped Black Warrior mineral wool 0.1kg that nano oxidized zirconium powder 2kg, length are 8-15mm is added thereto, is well mixed and is formed mixed
Compound；
(2) methyl silicate 1kg is taken, is added water about 3.1kg for 1: 27 ratio in the mol ratio of methyl silicate and water, then
0.2mol/L dilute hydrochloric acid solution 0.56L is added, stirring 30min is reacted and controls the pH value of reaction system to be less than 3, stood
12 hours, positive silicate solution is made；
(3) aluminium dihydrogen phosphate 1.2kg and water 0.6kg is mixed, the pH value for material of being sized mixing after stirring is not more than 3.0, obtained
Binding agent；
(4) mixture is stirred with 400r/min, be successively sprayed to binding agent, positive silicate solution by the way of spraying mixed
By mixture uniform wet, to obtain moistening material on compound；
(5) with hydraulic test by moistening material in dry powder loose thickness: compacted density=3.2: 1 ratio system
Plate；
(6) obtained sheet material is placed in the fog room for being connected with ammonia, maintenance processing 24 hours obtains maintenance plate；
(7) rest backplate to be placed in high temperature kiln, dried 24 hours at 200 DEG C, nano thermal insulation plate is made.
Embodiment 6
The preparation method of nano thermal insulation plate described in the present embodiment, comprises the following steps：
(1) the silica aerogel particles 10kg for taking aperture to be 20-30nm, is ground into the powder of 800-1100 mesh
Body；The chopped high silica fiber 0.55kg that vacuum ceramic microballoon 2kg, length are 10-30mm is added thereto, is well mixed and is formed
Mixture；
(2) tetraethyl orthosilicate 1kg is taken, is added water about 3.2kg for 1: 27 ratio in the mol ratio of methyl silicate and water, then
0.2mol/L dilute hydrochloric acid solution 0.25L is added, stirring 30min is reacted and controls the pH value of reaction system to be less than 3, stood
12 hours, positive silicate solution is made；
(3) secure ph is not more than 3.0 Ludox 2.2Kg, obtains binding agent；
(4) mixture is stirred with 600r/min, be successively sprayed to binding agent, positive silicate solution by the way of spraying mixed
By mixture uniform wet, to obtain moistening material on compound；
(5) with hydraulic test by moistening material in dry powder loose thickness: compacted density=2.8: 1 ratio system
Plate；
(6) obtained sheet material is placed in the fog room for being connected with ammonia, maintenance processing 24 hours obtains maintenance plate；
(7) rest backplate to be placed in high temperature kiln, microwave drying 24 hours at 250 DEG C, nano thermal insulation plate is made.
Comparative example 1
For the embodiment in the preparation reference Chinese patent literature CN101628804A of the nano thermal insulation in this comparative example
1, difference is, pouring technology is replaced with hydroforming process.
Comparative example 2
The preparation method of nano thermal insulation plate described in this comparative example, comprises the following steps：
(1) the silica aerogel particles 10kg for taking aperture to be 30-50nm, is ground into the powder of 600-1000 mesh
Body；The chopped mullite fiber 0.3kg that Nano-sized Ferric Oxide Powder 4kg, length are 10-20mm is added thereto, stirs and evenly mixs to be formed
Mixture；
(2) methyl silicate 1kg is taken, is added water about 2.1kg for 1: 20 ratio in the mol ratio of methyl silicate and water, then
0.2mol/L dilute hydrochloric acid solution 0.8L is added, stirring 30min is reacted and controls the pH value of reaction system to be less than 3, stood
12 hours, positive silicate solution is made；
(3) mixture of step (1) is added into positive silicate solution, stir to obtain moistening material；
(4) with hydraulic test by moistening material in dry powder loose thickness: compacted density=3: 1 ratio carries out making sheet；
(5) obtained sheet material is placed in the fog room for being connected with ammonia, maintenance processing 24 hours obtains maintenance plate；
(6) rest backplate to be placed in high temperature kiln, microwave drying 24 hours at 200 DEG C, nano thermal insulation plate is made.
Comparative example 3
The preparation method of nano thermal insulation plate described in the present embodiment, comprises the following steps：
(1) the silica aerogel particles 10kg for taking aperture to be 30-50nm, is ground into the powder of 1000-1200 mesh
Body；The chopped mullite fiber 0.3kg that Nano-sized Ferric Oxide Powder 4kg, length are 10-20mm is added thereto, is well mixed and is formed
Mixture；
(2) methyl silicate 1kg is taken, is added water about 2.1kg for 1: 20 ratio in the mol ratio of methyl silicate and water, then
0.2mol/L dilute hydrochloric acid solution 0.8L is added, stirring 30min is reacted and controls the pH value of reaction system to be less than 3, stood
12 hours, positive silicate solution is made；
(3) mixture is stirred with 200r/min, will just for 0.1: 1 ratio in the mass ratio of positive silicate solution and mixture
Silicate solution is sprayed on mixture in the way of spraying with the uniform wet mixture, obtains moistening material；
(4) with hydraulic test by moistening material in dry powder loose thickness: compacted density=3: 1 ratio carries out making sheet；
(5) obtained sheet material is placed in high temperature kiln, microwave drying 24 hours at 200 DEG C, nano thermal insulation plate is made.
Experimental example
Detection method according to national standard GB/T 5480-2008 defineds is surveyed to the density of above-mentioned nano thermal insulation plate
Examination；Detection method according to national standard GB/T 10295-2008 defineds is tested to the thermal conductivity of above-mentioned nano thermal insulation plate；
Detection method according to GB/T 5486-2008 defineds tests the compressive resistance of above-mentioned nano thermal insulation plate, as a result such as the institute of table 1
Show：
The performance indications of nano thermal insulation plate made from the above-described embodiment of table 1 and comparative example
As it can be seen from table 1 nano thermal insulation plate made from 1-6 of the embodiment of the present invention has less density, low thermal conductivity
Rate and high compressive resistance, illustrating the preparation method of the present invention can obtain that heat-proof quality is good and nanometer of high mechanical strength guarantor
Warm plate.Compared with comparative example 2, the thermal conductivity of embodiment 1-6 nano thermal insulation plate is lower, illustrates that the preparation method of the present invention passes through
The insulation heat-insulating property of material is favorably improved using the feed way of spraying.And compared with comparative example 3, embodiment 1-6's receives
The compressive resistance of rice warming plate is bigger, illustrates that the preparation method of the present invention is handled by ammonia maintenance and is conducive to strengthening the machine of sheet material
Tool intensity.Especially compared with comparative example 1, embodiment 1-6 nano thermal insulation plate possesses smaller density and thermal conductivity, illustrates the present invention
Preparation method by optimizing raw material constitute and preparation technology, the heat-insulating property of nano thermal insulation plate can be effectively improved.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (13)
1. a kind of preparation method of nano thermal insulation plate, comprises the following steps：
Blend step：It is 1 in mass ratio by silicon dioxide aerogel powder and infrared shielding agent, chopped strand：(0.1-0.5)：
The ratio of (0.01-0.1) is well mixed, and forms mixture；
The preparation process of positive silicate solution：In the presence of acid catalyst, by esters of silicon acis and hydromassage that than being 1：(18-36's)
Ratio is mixed, and stirring is lower to be reacted, and the pH value of control reaction system is less than 3, stands, produces positive silicate solution；
Moistening step：The positive silicate solution is sprayed on the mixture under stirring in the way of spraying,
Obtain moistening material；The addition of the positive silicate solution is not more than the 20% of the quality of the mixture；
Forming step：The moistening material is shaped to sheet material；
Curing step：In ammonia atmosphere, maintenance processing is carried out to the sheet material, maintenance plate is obtained；
Drying steps：Processing is dried to the maintenance plate, that is, nano thermal insulation plate is made.
2. preparation method according to claim 1, it is characterised in that the particle diameter of the silicon dioxide aerogel powder is
500-1200 mesh, aperture is 20-50nm.
3. preparation method according to claim 1, it is characterised in that the infrared shielding agent is nanometer zirconium silicate, nanometer
One or more in zirconium oxide, superfine titanium white, vacuum ceramic microballoon, nano-sized iron oxide or nano aluminium oxide；It is wherein described
The granularity of superfine titanium white is 0.1-0.5 microns.
4. preparation method according to claim 1, it is characterised in that the chopped strand be PET, glass fibre,
One or more in basalt fibre, alumina silicate fibre, high silica fiber or mullite fiber, the length of the chopped strand
For 6-30mm.
5. preparation method according to claim 1, it is characterised in that H in the acid catalyst+Molar concentration be
0.2mol/L；H in the acid catalyst+Mol ratio with the esters of silicon acis is (0.025-0.2)：5.
6. preparation method according to claim 5, it is characterised in that the esters of silicon acis is methyl silicate, positive silicic acid second
One or more in ester, positive silicic acid propyl ester or butyl silicate.
7. the preparation method according to claim any one of 1-6, it is characterised in that in the moistening step, stirs institute
The rotating speed for stating mixture is 200-800r/min.
8. preparation method according to claim 1, it is characterised in that the ratio between the mixture and density of the sheet material are
(2.5-3.5)：1.
9. preparation method according to claim 1, it is characterised in that
In the preparation process of the positive silicate solution, 12-48h is stood；
In the curing step, conserve 24 hours；
In the drying steps, temperature is 150-300 DEG C, and the time is 24 hours.
10. the preparation method according to claim 1,2,3,4,5,6,8 or 9, it is characterised in that in the moistening step
In, in addition to, before the positive silicate solution is added, binding agent is added into the mixture in the way of spraying；
The binding agent is aluminium dihydrogen phosphate aqueous solution and/or Ludox, and the pH value of the binding agent is less than 3；In the phosphoric acid
The mass content of aluminium dihydrogen phosphate is 66.7% in dihydro aluminum water solution.
11. preparation method according to claim 7, it is characterised in that in the moistening step, in addition to, adding
Before the positive silicate solution, binding agent is added into the mixture in the way of spraying；
The binding agent is aluminium dihydrogen phosphate aqueous solution and/or Ludox, and the pH value of the binding agent is less than 3；In the phosphoric acid
The mass content of aluminium dihydrogen phosphate is 66.7% in dihydro aluminum water solution.
12. preparation method according to claim 11, it is characterised in that the matter of the aluminium dihydrogen phosphate and the Ludox
Amount is than being 3：1.
13. preparation method according to claim 10, it is characterised in that the matter of the aluminium dihydrogen phosphate and the Ludox
Amount is than being 3：1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510700353.7A CN105367032B (en) | 2015-10-26 | 2015-10-26 | A kind of preparation method of nano thermal insulation plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510700353.7A CN105367032B (en) | 2015-10-26 | 2015-10-26 | A kind of preparation method of nano thermal insulation plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105367032A CN105367032A (en) | 2016-03-02 |
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| CN106007692B (en) * | 2016-05-13 | 2018-11-13 | 陈虹 | Foamed ceramics microballoon of nucleocapsid and its preparation method and application |
| CN106565196A (en) * | 2016-11-22 | 2017-04-19 | 袁洁 | Inorganic mixed refractory material |
| CN109293335A (en) * | 2018-11-01 | 2019-02-01 | 中山科邦化工材料技术有限公司 | A kind of high-strength heat-insulation plate and preparation method thereof |
| CN109336538A (en) * | 2018-11-01 | 2019-02-15 | 中山科邦化工材料技术有限公司 | A kind of multiple layers of high strength heat-insulating heat-preserving material and preparation method thereof |
| CN110256035B (en) * | 2019-06-24 | 2022-06-21 | 广州晖能环保材料有限公司 | Preparation method of high-strength nanometer thermal insulation board and high-strength nanometer thermal insulation board |
| CN110639409A (en) * | 2019-09-17 | 2020-01-03 | 清华大学 | Method and device for preparing homogeneous catalyst slurry with controllable concentration |
| CN111590926A (en) * | 2020-06-15 | 2020-08-28 | 万华建筑科技（烟台）有限公司 | Preparation method of rock wool short fiber composite aerogel insulation board |
| CN113045284A (en) * | 2021-03-11 | 2021-06-29 | 山东茂盛管业有限公司 | Heat-insulating paving tile block based on nano aerogel particles and preparation method thereof |
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| CN101628804A (en) * | 2008-07-18 | 2010-01-20 | 山东鲁阳股份有限公司 | Aerogel heat insulation composite material and preparation method thereof |
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| CN101628804A (en) * | 2008-07-18 | 2010-01-20 | 山东鲁阳股份有限公司 | Aerogel heat insulation composite material and preparation method thereof |
| CN102010179A (en) * | 2010-12-20 | 2011-04-13 | 中钢集团洛阳耐火材料研究院有限公司 | Method for preparing fiber-containing silicon dioxide aerogel composite thermal insulation material |
| CN103058622A (en) * | 2013-01-15 | 2013-04-24 | 赵峰 | Inorganic thermal insulation material and preparation method thereof |
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Effective date of registration: 20221026 Address after: Room 301, 3rd Floor, Building 3, No. 8, Chuangye Road, Economic and Technological Development Zone, Langfang City, Hebei Province, 065000 Patentee after: Hebei Jinna Low Carbon Materials Co.,Ltd. Address before: No. 8, Chuangye Road, Hebei Langfang Development Zone, Langfang City, Hebei Province 065,001 Patentee before: HEBEI JINNA TECHNOLOGY CO.,LTD. |