CN109796793A - A kind of aqueous inorganic high temperature heat radiation coating and preparation method thereof based on carbon nanomaterial - Google Patents
A kind of aqueous inorganic high temperature heat radiation coating and preparation method thereof based on carbon nanomaterial Download PDFInfo
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Abstract
A kind of aqueous inorganic high temperature heat radiation coating and preparation method thereof based on carbon nanomaterial, is related to the production technical field of aqueous inorganic high temperature heat radiation coating.The present invention has wetting well stable and chemical modification effect using nano material dispersing agent and coupling agent as main dispersing medium, to carbon nanomaterial, plays the role of to the stably dispersing of nano material good；By nano-milled and ultrasonic wave in terms of reinforcing physical dispersion nano material, thoroughly disperse that there is better effect to nano material；It can achieve the requirement of production this system by the nano material of grinding distribution.
Description
Technical field
The present invention relates to the production technical fields of aqueous inorganic high temperature heat radiation coating.
Background technique
Carbon nanomaterial refers to that carbon nanotube, nano carbon microsphere, carbon nano-fiber, nano-carbon material etc. are a kind of good heat conductives
Material, fine, nanosizing carbon nanomaterial have increase radiator radiation depth, effectively improve the emissivity of object.
1. high temperature radiates, heat radiation coating majority is that the solvent type organic resin coating of low temperature radiation radiates on the market, highest
Temperature be resistant to about 150 DEG C hereinafter, with heat dissipation technology continuous development, object cooling requirements are being continuously improved, high temperature dissipate
Hot coating is more and more paid attention to as heat radiation coating of new generation.
Control for VOC, radiator heat-dissipation is mostly to show that anodized and solvent type heat dissipation will produce based on coating
Product, these products can generate larger amount of sour water discharge and VOC emission in coating procedure.
Summary of the invention
Based on the defect of the above prior art, the object of the present invention is to provide a kind of formulas simply, can effectively reach low
VOC, the aqueous inorganic high temperature heat radiation coating resistant to high temperature based on carbon nanomaterial.
The present invention is made of following weight percent: inorganic silicate binder 10~30%, is received silica solution 10~20%
Rice material dispersant special 0.5~1%, coupling agent 0.5~2%, carbon nanomaterial 0.5~5%, high temperature heat dissipation filler 10~30%,
Oxide nanofiller 5~10%, thixotropic agent 0.1~1%, other auxiliary agents 0.1~5% and deionized water；The nano material is dedicated
Dispersing agent is the cationic high-molecular polymeric dispersant for being exclusively used in nano material；The carbon nanomaterial be carbon nanotube,
One of nano carbon microsphere or carbon nano-fiber.
The present invention is with aqueous inorganic binder for main film forming matter, and using deionized water as decentralized medium, selection is led with height
The nano-scale carbon material of hot, high mechanical strength, high-specific surface area and high chemical stability, selecting has high-temperature stability, prevents
The inorganic silicate binder and silica sol binder that corruption is had excellent performance select high temperature heat dissipation filler and the oxidation of high thermal conductivity
Recipe ingredient based on object nanofiller.By the use of the carbon nanomaterial of high thermal conductivity and high emissivity performance, reach reinforcement
The purpose of heat conduction and heat radiation；Reach coating characteristic resistant to high temperature by inorganic silicate binder；It is radiated by a variety of high temperature resistants
The combination of filler reaches paint film high thermal conductivity, the characteristic of high heat loss through radiation.Simultaneously by inorganic silicate binder, silica solution is high
Temperature heat dissipation filler, oxide nanofiller compounded combination, coating have high anti-corrosion, the characteristics such as high weatherability simultaneously.The present invention is
Inorganic high-temp heat radiation coating, VOC content is lower, and high temperature resistant is up to 600 DEG C or more, the thermal dissipating object harsh suitable for cooling requirements
On.
Further, inorganic silicate binder of the present invention is high-temperature resistant nano modified inorganic sodium silicate binder, resistance to height
Warm nano modified inorganic potassium silicate binder or high-temperature resistant nano modified inorganic lithium metasilicate binding agent and the modified nothing of high-temperature resistant nano
In machine zinc silicate binder at least any one.
It is preferred that high-temperature resistant nano modified inorganic lithium metasilicate.
Main film forming substance of the inorganic silicate as this system is selected, it is main to consider inorganic silicate high temperature resistance super performance
With outstanding Corrosion Protection, for the preferred inorganic silicic acid lithium binder of the present invention as this system film forming matter, inorganic silicic acid lithium can
Dissolve each other with alkaline aqueous solution, having can react production dry film not soluble in water from dry characteristic, can with surface hydrophilic group hydroxy,
The substance of carboxyl, amino etc. reacts to form high-temperature resistant membrane, and can long life anti corrosion.
The aqueous inorganic high temperature heat radiation coating based on carbon nanomaterial, it is characterised in that the silica solution is colloid two
Silica solution.
Silica solution is a kind of colloidal solution of micro-strip blue-opalescent, have biggish specific surface area, stronger adsorption capacity,
Electronegative hydroxyl has typical siloxanes key chemical structure, has excellent thermo oxidative stability, is high-temp. far infrared spoke
The perfect adhesion agent of coating is penetrated, heating temperature is up to 1200 DEG C or more.
The aqueous inorganic high temperature heat radiation coating based on carbon nanomaterial, it is characterised in that the coupling agent is titanate esters
In coupling agent, polysiloxane coupling agent, complex acid ester coupling agent or aluminate coupling agent at least any one.
Selection coupling agent is because coupling agent and material interface can form fine chemical bonding and act on, coupling agent and inorganic filler
It is bonded with polymer molecule, plays the function served as bridge interconnected between inorganic phase and organic phase, while coupling agent has very
Good interface infiltrates effect, can effectively weaken the contraction cohesive strength of organic resin, so that it is strong to the bonding of ground to increase paint film
Degree.These effects are to graphene dispersion and stablize same necessity, and there are also the effect of modification, Ke Yigeng to graphene for coupling agent
Good stabilization graphene.
The thixotropic agent is aqueous organobentonite thixotropic agent, fumed silica thixotropic agent, hydrogenated castor oil thixotropic agent
Or in aqueous polyamide wax emulsion at least any one.It is preferred that organic-silicon-modified bentonite and fumed silica.
It is system thixotropic agent through organic-silicon-modified bentonite and fumed silica, selects Si modification to assign bentonite resistance to
High-temperature behavior, fumed silica itself have high temperature resistance.
The high temperature heat dissipation filler is in spinel pigments, aluminium nitride, nitridation roc, silicon carbide, barium titanate or ceria
At least any one.
The above is the excellent thermal interfacial material system filler of heating conduction, and thermal coefficient is higher, in 30-150W/
It (mK) is for excellent high-temperature heat-conductive material between.
The oxide-based nanomaterial is in nano zine oxide, nano-titanium oxide, nano aluminium oxide or nano zircite
At least any one.
Nano-functional material is selected, there is high-temperature stability, has effect to coating compactness and increase paint film adhesion, is
Fire resistant anticorrosive functional stuffing, to reinforce system it is etch-proof it is necessary to.
Other auxiliary agents are ethylene glycol antifreeze, propylene glycol antifreezing agent；Coalescing agent, defoaming agent, preservative, mould inhibitor, PH
It is worth the combination of the one or more of regulator or more, it is preferable that other auxiliary agents are made of PH regulator, defoaming agent and preservative.
PH value adjustment agent is mainly the pH value of regulation system in this system, and inorganic coating stable system value is 8.5-
10；Defoaming agent, which is added, can prevent elimination system foam；It is to prevent paint vehicle septic yeast that preservative, which is added,.
It is a further object of the present invention to provide a kind of preparation methods of above-mentioned heat radiation coating.
The method of the present invention the following steps are included:
1) deionized water, nano material dispersing agent, coupling agent, silica solution, other auxiliary agents of part and part thixotropic agent are placed at
In dispersion cylinder, after middling speed is dispersed, carbon nanomaterial and inorganic oxide nano material are added again through high speed dispersion, is made and divides
Dissipate slurry；
2) dispersed paste is placed in nano-level grinder, reaches 25um through high speed grinding to slurry fineness, grinding slurry is made；Institute
The abrasive media for stating nano-level grinder is zirconium oxide bead that partial size is 0.6~1.0mm.
3) the aqueous inorganic silicate binder, other auxiliary agents of part and high temperature resistant heat dissipation of half amount are added in dispersion cylinder
Filler remixes after middling speed is dispersed with grinding slurry, continues to be ground to fineness and reaches 25um hereinafter, terminating grinding, acquirement is ground
The slurry of milled；
4) ground slurry is placed in paint mixing cylinder, remaining aqueous inorganic silicate binder, the touching of remaining part is added
Become agent and deionized water, being dispersed to four glasss of viscosity of painting through middling speed is 35-80s, and fineness is 25um hereinafter, pH value is 8.5-9.5, is obtained
Aqueous inorganic high temperature heat radiation coating.
The present invention has profit well using nano material dispersing agent and coupling agent as main dispersing medium, to carbon nanomaterial
Wet stabilization and chemical modification effect, play the role of the stably dispersing of nano material good；Reinforcing physical dispersion nanometer material
Material aspect thoroughly disperses have better effect to nano material by nano-milled and ultrasonic wave；By receiving for grinding distribution
Rice material can achieve the requirement of production this system.
Further, the speed of the low speed dispersion is 200~500r/min, and the speed of middling speed dispersion is 600~800r/
Min, the speed of the high speed dispersion are 1000~1500r/min.
The speed of the high speed grinding is 2000~2500r/min.
Specific embodiment
One, preparation process:
Prepare each embodiment material according to the component formula of table 1.
1: three each composition of raw materials of embodiment (unit: kg) of table
Note: inorganic silicate binder is high-temperature resistant nano modified inorganic sodium silicate binder in upper table, high-temperature resistant nano is modified
In inorganic silicic acid potassium binder or high-temperature resistant nano modified inorganic lithium metasilicate binding agent at least any one.
Nano material dispersant special is the anionic high polymer dispersion for being exclusively used in nano material.
Carbon nanomaterial is one of carbon nanotube, nano carbon microsphere or carbon nano-fiber.
Silica solution is colloidal silica solution.
Coupling agent be titanate coupling agent, polysiloxane coupling agent, complex acid ester coupling agent or aluminate coupling agent in extremely
Lack any one；The thixotropic agent is aqueous organobentonite thixotropic agent, fumed silica thixotropic agent, rilanit special thixotroping
In agent or aqueous polyamide wax emulsion at least any one.
High temperature radiates filler for spinel pigments, aluminium nitride, silicon nitride, nitridation roc, silicon carbide, barium titanate or ceria
In at least any one.
Oxide-based nanomaterial be nano zine oxide, nano-titanium oxide, nano aluminium oxide or nano zircite at least
Any one.
Other auxiliary agents are made of PH regulator, defoaming agent and preservative.
Embodiment 1:
It feeds intake according to each raw material of example 1 in table 1.
Concrete operation step:
1, by 10kg deionized water, 1kg nano material dispersing agent, 1kg coupling agent, 20kg silica solution, other auxiliary agents of 0.5kg and
0.5kg thixotropic agent is placed in dispersion cylinder, after middling speed is dispersed 5-10 minutes, adds 1kg carbon nanomaterial and 15kg is inorganic
Dispersed paste is made again through high speed dispersion 20 minutes in oxide-based nanomaterial.
2, full dose dispersed paste is placed in nano-level grinder, being built into partial size in nano-level grinder is 0.6-1.0mm's
Zirconium oxide bead is as abrasive media, through high speed grinding 30 minutes, obtains the grinding slurry that fineness is 25um.
3,10kg aqueous inorganic silicate binder, other auxiliary agents of 0.5kg and 20kg high temperature resistant are added in dispersion cylinder to dissipate
Hot filler remixes again with full dose grinding slurry after middling speed is dispersed 15 minutes, continues high speed grinding 30 minutes, obtaining fineness is
25um ground slurry below.
4, ground slurry is placed in paint mixing cylinder, 10kg aqueous inorganic silicate binder, 0.5kg thixotropic agent is added
With 5.5kg deionized water, disperse 10-15 minutes through middling speed.Sampling and testing, four glasss of viscosity 30-80s painting, fineness≤25um, pH value
It is 8.5-9 to get aqueous inorganic high temperature heat radiation coating.
The speed of the above low speed dispersion is 200~500r/min, and the speed of middling speed dispersion is 600~800r/min, high speed
The speed of dispersion is 1000~1500r/min, and the speed of high speed grinding is 2000~2500r/min.
Referring to embodiment 1, the dosage of each raw material is as shown in table 1 for embodiment 2, the preparation step of embodiment 3.
Two, coating made from the method for the present invention is carried out according to the standard that country, industry relevant criterion or enterprise formulate
Performance detection.
1, it is tested according to HG/T4846-2015 aqueous inorganic phosphate solvent resistant anticorrosive paint part of standards, each reality
Applying the all-round property testing of example, the results are shown in Table 2.
Table 2: all-round property testing result table
2, the cooling and heat dissipation effect the performance test results for the aqueous inorganic high temperature heat radiation coating that each embodiment obtains are as shown in table 3.
Table 3: cooling and heat dissipation measure of merit result table
| Test item | Example 1 | Example 2 | Example 3 | Testing standard |
| Thermal conductivity [W/ (m.k)] | 13 | 28 | 25 | GB/T10294-2008 |
| Thermal emissivity rate | 0.88 | 0.87 | 0.82 | Commission detection |
The aqueous inorganic high temperature heat radiation coating temperature test comparing result that embodiment 1 obtains is as shown in table 4.
Table 4: temperature test comparing result table
The aqueous inorganic high temperature heat radiation coating temperature test comparing result that embodiment 2,3 obtains is similar with table 4, omits contrast table.
Product of the invention is able to satisfy condition in detail below simultaneously:
1, product of the present invention performance section meets standard HG/T4846-2015 " aqueous inorganic phosphate solvent resistant anticorrosive paint ".
2, product of the present invention heat conduction and heat radiation performance section meets standard GB/T 10294-2008 " Technology of Steady State Thermal Resistance of Thermal Insulating Material
And the measurement Guarded hot plate in relation to characteristic ".
3, product of the present invention environmental-protecting performance fully meets HJ2537-2014 " the aqueous painting of environmental labelling product technical requirements
Material ".
Claims (10)
1. a kind of aqueous inorganic high temperature heat radiation coating based on carbon nanomaterial, it is characterised in that by following weight percent group
At: inorganic silicate binder 10~30%, silica solution 10~20%, nano material dispersant special 0.5~1%, coupling agent 0.5
~2%, carbon nanomaterial 0.5~5%, high temperature heat dissipation filler 10~30%, oxide nanofiller 5~10%, thixotropic agent 0.1~
1%, other auxiliary agents 0.1~5% and deionized water；The nano material dispersant special is the cationic for being exclusively used in nano material
High polymer dispersion；The carbon nanomaterial is one of carbon nanotube, nano carbon microsphere or carbon nano-fiber.
2. the aqueous inorganic high temperature heat radiation coating based on carbon nanomaterial according to claim 1, it is characterised in that inorganic silicon
Hydrochlorate binder is high-temperature resistant nano modified inorganic sodium silicate binder, high-temperature resistant nano modified inorganic potassium silicate binder or resistance to
In high-temperature nano modified inorganic lithium metasilicate binding agent and high-temperature resistant nano modified inorganic zinc silicate binder at least any one.
3. the aqueous inorganic high temperature heat radiation coating based on carbon nanomaterial according to claim 1, it is characterised in that the silicon
Colloidal sol is colloidal silica solution.
4. the aqueous inorganic high temperature heat radiation coating based on carbon nanomaterial according to claim 1, it is characterised in that the idol
Connection agent be titanate coupling agent, polysiloxane coupling agent, complex acid ester coupling agent or aluminate coupling agent at least any one；
The thixotropic agent is aqueous organobentonite thixotropic agent, fumed silica thixotropic agent, hydrogenated castor oil thixotropic agent or aqueous poly-
In amide wax emulsion at least any one.
5. the aqueous inorganic high temperature heat radiation coating based on carbon nanomaterial according to claim 1, it is characterised in that the height
Temperature heat dissipation filler is spinel pigments, aluminium nitride, aluminium oxide, silicon nitride, nitridation roc, silicon carbide, magnesia, zinc oxide, oxidation
In silicon, barium titanate or ceria at least any one.
6. the aqueous inorganic high temperature heat radiation coating based on carbon nanomaterial according to claim 1, it is characterised in that the oxygen
Compound nano material be nano zine oxide, nano-titanium oxide, nano aluminium oxide or nano zircite at least any one.
7. the aqueous inorganic high temperature heat radiation coating based on carbon nanomaterial according to claim 1, it is characterised in that it is described its
He is made of auxiliary agent PH regulator, defoaming agent and preservative.
8. the preparation method of the aqueous inorganic high temperature heat radiation coating based on carbon nanomaterial as described in claim 1, feature
Be the following steps are included:
1) deionized water, nano material dispersing agent, coupling agent, silica solution, other auxiliary agents of part and part thixotropic agent are placed at
In dispersion cylinder, after middling speed is dispersed, carbon nanomaterial and inorganic oxide nano material are added again through high speed dispersion, is made and divides
Dissipate slurry；
2) dispersed paste is placed in nano-level grinder, reaches 25um through high speed grinding to slurry fineness, grinding slurry is made；Institute
The abrasive media for stating nano-level grinder is zirconium oxide bead that partial size is 0.6~1.0mm；
3) the aqueous inorganic silicate binder, other auxiliary agents of part and high temperature resistant heat dissipation that half amount is added in dispersion cylinder are filled out
Material, remixes after middling speed is dispersed with grinding slurry, continues to be ground to fineness and reaches 25um hereinafter, terminating grinding, obtains grinding
Good slurry；
4) ground slurry is placed in paint mixing cylinder, remaining aqueous inorganic silicate binder, the touching of remaining part is added
Become agent and deionized water, being dispersed to four glasss of viscosity of painting through middling speed is 35~80s, and fineness is 25um hereinafter, pH value is 8.5~9.5,
Obtain aqueous inorganic high temperature heat radiation coating.
9. preparation method according to claim 8, it is characterised in that the speed of the low speed dispersion is 200~500r/
Min, the speed of middling speed dispersion are 600~800r/min, and the speed of the high speed dispersion is 1000~1500r/min.
10. preparation method according to claim 8, it is characterised in that the speed of the high speed grinding is 2000~2500r/
min。
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Cited By (4)
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| CN110734683A (en) * | 2019-09-24 | 2020-01-31 | 江苏金陵特种涂料有限公司 | Preparation method of water-based inorganic high-temperature-resistant inorganic nano epoxy coating |
| CN111442674A (en) * | 2020-03-17 | 2020-07-24 | 广州视源电子科技股份有限公司 | Method for processing heat dissipation plate |
| CN112126260A (en) * | 2020-09-22 | 2020-12-25 | 杭州净碳科技有限公司 | Hydrophilic radiation cooling coating and preparation method and application thereof |
| CN112225520A (en) * | 2020-09-11 | 2021-01-15 | 中发创新(北京)节能技术有限公司 | Environment-friendly silicon-aluminum-based inorganic heat-insulating coating with antibacterial capability |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110734683A (en) * | 2019-09-24 | 2020-01-31 | 江苏金陵特种涂料有限公司 | Preparation method of water-based inorganic high-temperature-resistant inorganic nano epoxy coating |
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| CN112225520A (en) * | 2020-09-11 | 2021-01-15 | 中发创新(北京)节能技术有限公司 | Environment-friendly silicon-aluminum-based inorganic heat-insulating coating with antibacterial capability |
| CN112126260A (en) * | 2020-09-22 | 2020-12-25 | 杭州净碳科技有限公司 | Hydrophilic radiation cooling coating and preparation method and application thereof |
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