CN113388313A - Heat-preservation and heat-insulation coating and preparation method thereof - Google Patents
Heat-preservation and heat-insulation coating and preparation method thereof Download PDFInfo
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- CN113388313A CN113388313A CN202110689172.4A CN202110689172A CN113388313A CN 113388313 A CN113388313 A CN 113388313A CN 202110689172 A CN202110689172 A CN 202110689172A CN 113388313 A CN113388313 A CN 113388313A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 238000004321 preservation Methods 0.000 title claims abstract description 23
- 238000009413 insulation Methods 0.000 title claims abstract description 20
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- 238000003756 stirring Methods 0.000 claims abstract description 63
- 238000005336 cracking Methods 0.000 claims abstract description 62
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- 239000012752 auxiliary agent Substances 0.000 claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000012530 fluid Substances 0.000 claims abstract description 5
- UGGQKDBXXFIWJD-UHFFFAOYSA-N calcium;dihydroxy(oxo)silane;hydrate Chemical compound O.[Ca].O[Si](O)=O UGGQKDBXXFIWJD-UHFFFAOYSA-N 0.000 claims description 30
- 239000005373 porous glass Substances 0.000 claims description 19
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 16
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 15
- 239000011259 mixed solution Substances 0.000 claims description 13
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- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 8
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 8
- 239000011343 solid material Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000032683 aging Effects 0.000 claims description 7
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000292 calcium oxide Substances 0.000 claims description 7
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000012065 filter cake Substances 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
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- 238000005303 weighing Methods 0.000 claims description 7
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 6
- 238000009775 high-speed stirring Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 description 27
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- 229920003002 synthetic resin Polymers 0.000 description 2
- 241000486679 Antitype Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000002131 composite material Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The application discloses an anti-cracking heat-insulating coating for a pipeline and a preparation method thereof, wherein the anti-cracking heat-insulating coating for the pipeline comprises 25-50 parts of matrix resin, 10-40 parts of hollow heat-insulating microspheres, 10-15 parts of glass powder, 0.2-1.0 part of functional auxiliary agent and 1-5 parts of anti-cracking modifier; the anti-cracking modifier comprises an absolute ethyl alcohol solution of a silane coupling agent with the mass fraction of 8-10%; the preparation method comprises the following steps: s1, placing the matrix resin, the functional assistant and the anti-cracking modifier into a stirring device according to the formula, and stirring and mixing to obtain matrix fluid; and S2, stirring and mixing the hollow heat-preservation microspheres, the glass powder, the aerogel particles and the anti-crack modified fibers according to the formula to obtain the anti-crack heat-preservation and heat-insulation coating for the pipeline. The crack-resistant heat-insulating coating for the pipeline can be used for pipeline heat insulation, and the crack resistance of the coating can be effectively improved.
Description
Technical Field
The application relates to the field of heat-insulating coatings, in particular to an anti-cracking heat-insulating coating for pipelines and a preparation method thereof.
Background
Petrochemical engineering is a large-capacity household and a large-energy-consumption household, wherein a large number of pipelines and equipment need to be subjected to heat preservation, cold insulation and heat insulation. If the relevant equipment and facilities are not insulated properly, heat can be seriously dissipated, and the energy lost due to heat dissipation of the pipelines accounts for about one third of the total energy consumption annually. And after heat is dissipated, the fluidity of the medium is greatly reduced, oil-water separation and transportation are seriously influenced, and even the physical property of crude oil is influenced.
The heat insulation coating has a plurality of advantages which are not possessed by the traditional heat insulation material, such as simple and convenient construction, and no limitation of space and shape; the heat conductivity coefficient is low, and the thickness of the heat-insulating layer can be greatly reduced; according to the field application environment, the coating formula is reasonably optimized to enable the coating to have the characteristics of corrosion resistance, leakage resistance and the like, and the problem of corrosion of metal under the heat-insulating layer is effectively solved; the construction can be carried out at low temperature, production stop is not needed, and the maintenance difficulty and the cost are greatly reduced. The heat insulation coating provides a new strategy for energy conservation and emission reduction in the petrochemical industry and prolonging the service life of pipelines, and has good application prospect.
However, the existing heat-insulating coating for pipelines has the defects that the adhesion of base materials is not enough, the base materials are easy to peel off in the using process, the using performance is influenced, and the heat-insulating performance is reduced due to the cracking of a coating film.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
In view of the above, the invention provides an anti-cracking heat-insulating coating for pipelines, which has excellent anti-cracking performance and prolongs the service life of pipeline heat-insulating materials.
The invention also provides a preparation method of the anti-cracking heat-insulating coating for the pipeline, the preparation method is simple, and the heat-insulating coating prepared by the method has excellent anti-cracking performance and high mechanical strength.
According to the embodiment of the first aspect of the invention, the crack-resistant heat-insulating coating for the pipeline comprises the following components in parts by weight: 25-50 parts of matrix resin, 10-40 parts of hollow heat-insulating microspheres, 10-15 parts of glass powder, 0.2-1.0 part of functional auxiliary agent and 1-5 parts of anti-cracking modifier; the anti-cracking modifier comprises 8-10 mass percent of anhydrous ethanol solution of a silane coupling agent.
According to the anti-cracking heat-insulating coating for the pipeline, disclosed by the embodiment of the invention, the glass powder and the hollow heat-insulating microspheres are selected to replace inorganic fillers in a traditional heat-insulating material, so that on one hand, the heat-insulating effect of the hollow heat-insulating microspheres is better than that of fillers adopted in the prior art, and the heat-insulating property of a coating structure can be effectively improved; on the other hand, the silane coupling agent is used as a modified material, so that the agglomeration phenomenon among glass powder can be effectively improved, and the bonding strength between the matrix resin and the hollow heat-insulating microspheres is improved, so that the mechanical property of the anti-cracking heat-insulating coating for the pipeline is further improved.
The crack-resistant heat-insulating coating for the pipeline provided by the embodiment of the invention also has the following additional technical characteristics:
according to one embodiment of the invention, the crack-resistant heat-insulating coating for the pipeline comprises the following components in parts by weight: 30-40 parts of matrix resin, 20-30 parts of hollow heat-insulating microspheres, 12-15 parts of glass powder, 0.7-1.0 part of functional auxiliary agent and 3-5 parts of anti-cracking modifier.
According to one embodiment of the invention, the crack-resistant heat-insulating coating for pipelines further comprises the following components in parts by weight: 6-8 parts of aerogel particles, wherein the aerogel particles are 200-300 meshes.
According to one embodiment of the invention, the crack-resistant heat-insulating coating for pipelines further comprises the following components in parts by weight: 10-15 parts of anti-cracking modified fiber.
According to one embodiment of the invention, the anti-cracking modified fibers comprise porous glass fibers, xonotlite whisker fibers and calcium sulfate hemihydrate fibers, wherein the porous glass fibers, the xonotlite whisker fibers and the calcium sulfate hemihydrate fibers are mixed according to a mass ratio of 1: 3-5: 6-8.
According to one embodiment of the invention, the porosity of the porous glass fiber is 15-20%.
According to one embodiment of the invention, the xonotlite whisker fiber is prepared by the following scheme:
(1) according to the mass ratio of 1:3, mixing calcium oxide and calcium carbonate to obtain mixed particles, collecting the mixed particles, adding the mixed particles into deionized water according to the mass ratio of 1: 10-15, stirring, mixing, standing, sealing, and aging for 24 hours to obtain a mixed solution;
(2) respectively weighing 45-50 parts by weight of the mixed solution, 10-15 parts by weight of silica sol with the solid content of 15% and 3-5 parts by weight of modified additive, stirring and mixing, heating to 210-220 ℃ at a speed of 3 ℃/min, and stirring for 6-8 hours at a temperature of 3-5 MPa;
(3) and after stirring, standing and cooling to 50 ℃, filtering and collecting a filter cake, and drying at 55-60 ℃ for 6-8 hours to obtain the xonotlite whisker fiber.
According to an embodiment of the present invention, the modifying additive is any one of cetyltrimethylammonium bromide or vanadium pentoxide.
According to the second aspect of the invention, the preparation method of the crack-resistant heat-insulating coating for the pipeline comprises the following steps: s1, placing the matrix resin, the functional auxiliary agent and the anti-cracking modifier into a stirring device according to the formula, and stirring and mixing to obtain matrix liquid; and S2, stirring and mixing the hollow heat-preservation microspheres, the glass powder, the aerogel particles and the anti-cracking modified fibers according to the formula, stirring at a low speed for 5-10 min, collecting solid materials, adding the solid materials into the matrix solution, and stirring at a high speed for 15-20 min to obtain the anti-cracking heat-preservation and heat-insulation coating for the pipeline.
According to an embodiment of the invention, in step S2, the low speed stirring speed is 200-300 r/min, and the high speed stirring speed is 700-800 r/min.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The following detailed description of embodiments of the invention is intended to be illustrative, but not limiting, of the invention.
The following describes in detail an anti-crack thermal insulation coating for pipelines and a preparation method thereof according to an embodiment of the present invention.
Firstly, the crack-resistant heat-insulating coating for the pipeline comprises the following components in parts by weight: 25-50 parts of matrix resin, 10-40 parts of hollow heat-insulating microspheres, 10-15 parts of glass powder, 0.2-1.0 part of functional additive and 1-5 parts of anti-cracking modifier; the anti-cracking modifier comprises 8-10% by mass of anhydrous ethanol solution of silane coupling agent.
Therefore, according to the anti-cracking heat-insulating coating for the pipeline, disclosed by the embodiment of the invention, the glass powder and the hollow heat-insulating microspheres are selected to replace inorganic fillers in a traditional heat-insulating material, so that on one hand, the heat-insulating effect of the hollow heat-insulating microspheres is better than that of fillers adopted in the prior art, and the heat-insulating property of a coating structure can be effectively improved; on the other hand, the silane coupling agent is adopted as the modified material, so that the agglomeration phenomenon among glass powder can be effectively improved, and the bonding strength between the organic matrix and the filler is improved, thereby further improving the mechanical strength of the anti-cracking heat-insulating coating for the pipeline.
According to one embodiment of the invention, the crack-resistant heat-insulating coating for the pipeline comprises the following substances in parts by weight: 30-40 parts of matrix resin, 20-30 parts of hollow heat-insulating microspheres, 12-15 parts of glass powder, 0.7-1.0 part of functional additive and 3-5 parts of anti-cracking modifier.
By adopting the technical scheme, the component proportion of the coating material is optimized, and the coating material aims to enable the proportion between the matrix resin and other components to be more reasonable through the optimized composition formula, so that on one hand, the phenomenon that each component in the added material is too high to cause agglomeration is improved, and on the other hand, the optimized coating material has good structural strength and mechanical property after coating is completed.
In some embodiments of the invention, the crack-resistant thermal insulation coating for pipelines further comprises the following components in parts by weight: 6-8 parts of aerogel particles, wherein the aerogel particles are 200-300 meshes.
By adopting the technical scheme, as aerogel particle materials are added into the heat insulation coating, the pores in the gel space network structure can well obstruct solid heat conduction and prolong the air heat convection path, so that the lower heat conductivity is kept, and meanwhile, the pore wall of the aerogel open pore structure is equivalent to a plurality of reflecting surfaces and refracting surfaces of heat radiation on one hand, so that heat loss caused by the heat radiation can be greatly inhibited; on the other hand, the design of the porous structure can effectively improve the bonding strength between the aerogel particle material and the matrix resin, thereby effectively improving the bonding strength and the crack resistance of the heat-insulating coating.
Further, the anti-cracking heat-insulating coating for the pipeline also comprises 10-15 parts by weight of anti-cracking modified fibers.
Through adopting above-mentioned technical scheme, because this application technical scheme has added anti modified fiber that splits in pipeline heat preservation thermal-insulated coating, compare the granule material that adopts among the prior art, the anti modified fiber that splits that this application adopted belongs to fiber material, and fiber material can form good entanglement structure, and payload fills inside the coating, through the inside good entanglement network that has of coating to effectively improved the single structural performance of coating, further improved the anti-crack effect of heat preservation thermal-insulated coating.
In some embodiments of the invention, the anti-cracking modified fiber comprises porous glass fiber, xonotlite whisker fiber and calcium sulfate hemihydrate fiber which are mixed according to the mass ratio of 1: 3-5: 6-8.
By adopting the technical scheme, the components of the anti-cracking modified fiber are optimized, wherein the porous glass fiber has a porous structure, so that the entanglement performance with the xonotlite whisker fiber and the calcium sulfate hemihydrate fiber can be improved, and the anti-cracking performance of the coating is improved. Meanwhile, the calcium sulfate hemihydrate fiber and the xonotlite whisker fiber adopted by the coating have extremely strong activity, are easy to generate chemical bonding with matrix resin, improve the acting force between the matrix resin and other components, generate more elastic deformation and microscopic deformation after the coating formed by coating is stressed, increase the strength and toughness of the coating, and improve the mechanical property, thereby improving the anti-cracking property of the coating.
Further, the porosity of the porous glass fiber is 15-20%.
Through adopting above-mentioned technical scheme, because this application has optimized porous glass fiber's porosity, prevent that porous glass fiber from leading to its intensity to reduce because porosity is too high, can not play anti effect of splitting, also prevent simultaneously that porous glass fiber's porosity from crossing lowly to can't regard as connection structure, effectively entangle each anti-crack fibre.
Further, the xonotlite whisker fiber is prepared by adopting the following scheme:
(1) according to the mass ratio of 1:3, mixing calcium oxide and calcium carbonate to obtain mixed particles, collecting the mixed particles, adding the mixed particles into deionized water according to the mass ratio of 1: 10-15, stirring, mixing, standing, sealing, and aging for 24 hours to obtain a mixed solution;
(2) respectively weighing 45-50 parts by weight of mixed liquor, 10-15 parts by weight of silica sol with the solid content of 15% and 3-5 parts by weight of modified additive, stirring and mixing, heating to 210-220 ℃ at a speed of 3 ℃/min, and stirring for 6-8 hours at a temperature of 3-5 MPa;
(3) and after stirring, standing and cooling to 50 ℃, filtering and collecting a filter cake, and drying at 55-60 ℃ for 6-8 h to prepare the xonotlite whisker fiber.
According to the technical scheme, the silica sol and the calcium carbonate are selected as main raw materials, the solid phase particle suspension liquid phase is guaranteed through stirring treatment at the initial stage of hydrothermal reaction, in the stirring process, after the C-S-H gel is generated, the C-S-H gel not only moves along with the fluid but also rotates under the action of stirring, the shearing force is applied to the surface of the C-S-H gel particles, the flaky C-S-H gel is promoted to form spherical particles, and finally the xonotlite fiber crystals are obtained, so that the xonotlite fiber crystals have good strength and structural performance.
In some embodiments of the invention, the modifying additive is any one of cetyltrimethylammonium bromide and vanadium pentoxide.
Through the technical scheme, by using the modification additive, in the process of preparing the xonotlite fiber whisker, the surface activity of reactants is enhanced, the mixing of the reactants is promoted, the density of a synthesized product can be reduced, and the prepared xonotlite fiber whisker has good bonding strength and mechanical property.
The application also provides a preparation method of the anti-cracking heat-insulating coating for the pipeline, which comprises the following steps: s1, placing the matrix resin, the functional assistant and the anti-cracking modifier into a stirring device according to the formula, and stirring and mixing to obtain matrix fluid; and S2, stirring and mixing the hollow heat-preservation microspheres, the glass powder, the aerogel particles and the anti-cracking modified fibers according to the formula, stirring at a low speed for 5-10 min, collecting solid materials, adding the solid materials into the matrix solution, and stirring at a high speed for 15-20 min to obtain the anti-cracking heat-preservation and heat-insulation coating for the pipeline.
By adopting the technical scheme, the liquid phase and the solid phase are respectively and independently mixed, and then the liquid phase and the solid phase are mixed together, so that the condition that the particle materials are not uniformly mixed in the matrix liquid is improved, and the uniformity of the coating can be further improved by mixing for many times, so that the prepared coating has good structural performance after the coating is formed, and the crack resistance of the coating is improved.
In the technical scheme of the application, in the step S2, the low-speed stirring speed is 200-300 r/min, and the high-speed stirring speed is 700-800 r/min.
By adopting the technical scheme, the speed of stirring is optimized, the entanglement structure is formed by low-speed stirring, and then the composite material is dispersed by high-speed stirring, so that the coating is uniformly dispersed, and the anti-cracking performance of the coating is improved.
In summary, the present application has at least the following beneficial effects:
firstly, this application replaces the inorganic filler among the traditional insulation material through chooseing for use glass powder and hollow heat preservation microballon, and on the one hand, the heat preservation effect of hollow heat preservation microballon is better than the filler, can effectively improve the thermal-insulated heat preservation performance of coating structure, and on the other hand, this application has adopted silane coupling agent to be modified material, can effectively improve the reunion phenomenon between the glass powder, improves the bonding strength between organic base member and the filler simultaneously to further improve the mechanical strength of anti type heat preservation thermal-insulated coating for the pipeline.
Secondly, the proportion of the components of the coating material is optimized, and the purpose is that the proportion between the resin and the additive material is more reasonable through the optimized composition formula, so that on one hand, the phenomenon of agglomeration caused by too high components in the additive material is improved, and on the other hand, the optimized coating has good structural strength and mechanical property.
The third, aerogel material has still been added in heat preservation thermal-insulated coating in this application, because the hole among the gel space network structure can separate solid heat-conduction and extension air heat convection route well, and then keep lower heat conductivity, aerogel open cell structure's pore wall simultaneously, be equivalent to the plane of reflection and the refracting surface of countless thermal radiation on the one hand, the heat that can restrain the thermal radiation greatly and lead to scatters and disappears, on the other hand, porous structure's design can effectively improve the bonding strength between aerogel material and the base member, thereby effectively improve heat preservation thermal-insulated coating's bonding strength and crack resistance.
Fourthly, the components of the anti-cracking modified fiber are optimized, wherein the porous glass fiber can improve the entanglement performance with xonotlite whisker fiber and calcium sulfate hemihydrate fiber through the porous structure of the porous glass fiber, so that the anti-cracking performance of the single fiber modified coating is improved, meanwhile, the calcium sulfate hemihydrate fiber and the xonotlite whisker fiber adopted by the coating have extremely strong activity, are easy to have a chemical bonding effect with oxygen in high polymer resin, the acting force between the filler and the base material is improved, and are generated after the coating is stressed, more elastic deformation and micro deformation are generated, the strength and toughness of the coating are improved, the mechanical property is improved, and the anti-cracking performance of the coating is improved.
The following describes in detail the crack-resistant thermal insulation coating for pipelines and the preparation method thereof according to the embodiment of the present invention with reference to specific embodiments.
In the examples of the present application, the raw materials and the equipment used are as follows, but not limited thereto:
in the application, all raw materials and instruments and equipment can be obtained by market, and the specific models are as follows:
matrix resin epoxy resin E-51;
functional auxiliary agents: a dispersant PPG-200;
a constant-temperature magnetic heating stirrer CL-3;
an electrothermal blowing dry box 101-1.
Preparation example
Preparation of xonotlite whisker fiber
Preparation example 1
(1) According to the mass ratio of 1:3, mixing calcium oxide and calcium carbonate, collecting mixed particles, adding the mixed particles into deionized water according to the mass ratio of 1:10, stirring, mixing, standing, sealing, and aging for 24 hours to obtain a mixed solution;
(2) respectively weighing 45 parts of mixed solution, 10 parts of silica sol with the solid content of 15 percent and 3 parts of hexadecyl trimethyl ammonium bromide according to parts by weight, stirring and mixing, heating to 210 ℃ at the speed of 3 ℃/min, and keeping the temperature and stirring for 6 hours under the pressure of 3 MPa;
(3) and after stirring, standing and cooling to 50 ℃, filtering and collecting a filter cake, and drying at 55 ℃ for 6 hours to prepare the xonotlite whisker fiber 1.
Preparation example 2
(1) According to the mass ratio of 1:3, mixing calcium oxide and calcium carbonate, collecting mixed particles, adding the mixed particles into deionized water according to the mass ratio of 1:12, stirring, mixing, standing, sealing, and aging for 24 hours to obtain a mixed solution;
(2) respectively weighing 47 parts of mixed solution, 12 parts of silica sol with the solid content of 15 percent and 4 parts of hexadecyl trimethyl ammonium bromide according to the parts by weight, stirring and mixing, heating to 202 ℃ at the speed of 3 ℃/min, and stirring for 7 hours under the condition of heat preservation and 4 MPa;
(3) and after stirring, standing and cooling to 50 ℃, filtering and collecting a filter cake, and drying at 57 ℃ for 7 hours to prepare the xonotlite whisker fiber 2.
Preparation example 3
(1) According to the mass ratio of 1:3, mixing calcium oxide and calcium carbonate, collecting mixed particles, adding the mixed particles into deionized water according to the mass ratio of 1:15, stirring, mixing, standing, sealing, and aging for 24 hours to obtain a mixed solution;
(2) respectively weighing 50 parts of mixed solution, 15 parts of silica sol with the solid content of 15 percent and 5 parts of hexadecyl trimethyl ammonium bromide according to the parts by weight, stirring and mixing, heating to 220 ℃ at the speed of 3 ℃/min, and keeping the temperature and stirring for 8 hours under the pressure of 5 MPa;
(3) and after stirring, standing and cooling to 50 ℃, filtering, collecting a filter cake, and drying at 60 ℃ for 8 hours to obtain the xonotlite whisker fiber 3.
Preparation example 4
(1) According to the mass ratio of 1:3, mixing calcium oxide and calcium carbonate, collecting mixed particles, adding the mixed particles into deionized water according to the mass ratio of 1:15, stirring, mixing, standing, sealing, and aging for 24 hours to obtain a mixed solution;
(2) respectively weighing 50 parts of mixed solution, 15 parts of silica sol with the solid content of 15 percent and 5 parts of vanadium pentoxide according to parts by weight, stirring and mixing, heating to 220 ℃ at the speed of 3 ℃/min, and keeping the temperature and stirring for 8 hours under the pressure of 5 MPa;
(3) and after stirring, standing and cooling to 50 ℃, filtering, collecting a filter cake, and drying at 60 ℃ for 8 hours to obtain the xonotlite whisker fiber 4.
Preparation of anti-crack modified fiber
Preparation example 5
And stirring and mixing the porous glass fiber with the porosity of 15%, the xonotlite whisker fiber 1 and the calcium sulfate hemihydrate fiber according to the mass ratio of 1:3:6 to obtain the anti-crack modified fiber 1.
Preparation example 6
And stirring and mixing the porous glass fiber with the porosity of 17%, the xonotlite whisker fiber 2 and the calcium sulfate hemihydrate fiber according to the mass ratio of 1:4:7 to obtain the anti-crack modified fiber 2.
Preparation example 7
And stirring and mixing the porous glass fiber with the porosity of 20%, the xonotlite whisker fiber 3 and the calcium sulfate hemihydrate fiber according to the mass ratio of 1:5:8 to obtain the anti-crack modified fiber 3.
Preparation example 8
And stirring and mixing the porous glass fiber with the porosity of 17%, the xonotlite whisker fiber 4 and the calcium sulfate hemihydrate fiber according to the mass ratio of 1:4:7 to obtain the anti-crack modified fiber 4.
Examples
Example 1
S1, firstly, placing 25 parts of matrix resin, 0.2 part of functional auxiliary agent and 1 part of anhydrous ethanol solution of silane coupling agent with the mass fraction of 8% in a stirring device according to the formula, and stirring and mixing to obtain matrix fluid;
and S2, stirring and mixing 10 parts of hollow heat-preservation microspheres, 10 parts of glass powder, 6 parts of 200-mesh aerogel particles and 10 parts of anti-cracking modified fibers 1 according to the formula, stirring at a low speed of 200r/min for 5min, collecting solid materials, adding the solid materials into the matrix liquid, and stirring at a high speed of 700r/min for 15min to obtain the anti-cracking heat-preservation and heat-insulation coating for the pipeline.
Examples 2 to 10
Examples 2 to 10: the difference between the anti-cracking heat-insulating coating for the pipeline and the embodiment 1 is that the proportion and the preparation parameters of the anti-cracking heat-insulating coating for the pipeline are shown in the table 1, and the rest preparation steps and the preparation environment are the same as those of the embodiment 1.
Table 1 table of the ingredient ratios of the raw materials in examples 1 to 10
Comparative example
Comparative example 1: the difference between the anti-cracking heat-insulating coating for the pipeline and the embodiment 1 is that the comparative example 1 is not added with an anti-cracking modifier, and the other preparation conditions and the component proportion are the same as those of the embodiment 1.
Comparative example 2: the difference between the anti-cracking heat-insulating coating for the pipeline and the embodiment 1 is that the glass fiber is adopted in the comparative example 2 to replace the anti-cracking modified fiber 1 in the embodiment 1, and the other preparation conditions and the component proportion are the same as those in the embodiment 1.
Comparative example 3: the anti-cracking heat-insulating coating for the pipeline is different from the coating in the example 1 in that diatomite particles are adopted in the comparative example 3 to replace the aerogel material in the example 1, and the preparation conditions and the component proportion are the same as those in the example 1.
Performance test
The performance tests were conducted on examples 1 to 10 and comparative examples 1 to 3, respectively.
Detection method/test method
And (3) observing whether the coating sample generates cracks and the size of the cracks by using a rapid high-temperature sintering furnace, and classifying the cracks into four grades: the grade I is smooth in surface and has no cracks or only extremely fine cracks; the II level is that the surface has dendritic or reticular cracks, and the width of the cracks is less than 0.5 mm; the III level is that the surface has dendritic or reticular cracks, and the width of the cracks is less than 1 mm; the IV grade is that the surface has dendritic or reticular cracks, and the width of the cracks is more than 1 mm. The specific detection results are shown in the following table 2:
TABLE 2 Performance test Table for crack-resistant thermal insulation coating for pipeline
Performance analysis was performed from table 2 above:
(1) the components in the embodiments 1 to 10 are mixed together with table 2, and it can be found that the crack-resistant heat-insulating coating for pipelines prepared by the method has good high-temperature crack resistance, which indicates that the technical scheme of the method selects glass powder and hollow heat-insulating microspheres to replace inorganic fillers in traditional heat-insulating materials, on one hand, the heat-insulating effect of the hollow heat-insulating microspheres is better than that of the fillers, and the heat-insulating property of a coating structure can be effectively improved, on the other hand, the silane coupling agent is adopted as a modified material, so that the agglomeration phenomenon between the glass powder can be effectively improved, and the bonding strength between an organic matrix and the fillers is improved, thereby further improving the mechanical strength of the crack-resistant heat-insulating coating for pipelines.
(2) Comparing the performance of the comparative examples 1-3 with that of the example 1, because the comparative examples 1-3 adopt other materials to replace the anti-cracking modified material in the technical scheme, as shown in table 2, the high temperature anti-cracking performance is obviously reduced, which indicates that the technical scheme of the application also adds the aerogel material in the thermal insulation coating, because the pores in the gel space network structure can well obstruct the solid heat conduction and prolong the air heat convection path, and further keep the lower heat conductivity, meanwhile, the pore wall of the aerogel open pore structure is equivalent to the reflecting surface and the refracting surface of numerous heat radiation on one hand, the heat loss caused by the heat radiation can be greatly inhibited, on the other hand, the design of the porous structure can effectively improve the bonding strength between the aerogel material and the matrix, thereby effectively improving the bonding strength and the anti-cracking performance of the thermal insulation coating, and simultaneously optimizing the components of the anti-cracking modified fiber, the porous glass fiber can improve the entanglement performance with xonotlite whisker fiber and calcium sulfate hemihydrate fiber through the porous structure, so that the crack resistance of the single fiber modified coating is improved, meanwhile, the calcium sulfate hemihydrate fiber and the xonotlite whisker fiber adopted by the application have extremely strong activity, easily have a chemical bonding effect with oxygen in high polymer resin, the acting force between a filler and a base material is improved, and the filler and the base material are generated after a coating is stressed, so that more elastic deformation and micro deformation are generated, the strength and toughness of the coating are improved, the mechanical property is improved, and the crack resistance of the coating is improved.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The crack-resistant heat-insulating coating for the pipeline is characterized by comprising the following components in parts by weight:
25-50 parts of matrix resin;
10-40 parts of hollow heat-insulating microspheres;
10-15 parts of glass powder;
0.2-1.0 part of functional auxiliary agent;
1-5 parts of an anti-cracking modifier;
the anti-cracking modifier comprises 8-10 mass percent of anhydrous ethanol solution of a silane coupling agent.
2. The crack-resistant heat-insulating coating for the pipeline as claimed in claim 1, which comprises the following components in parts by weight:
30-40 parts of matrix resin;
20-30 parts of hollow heat-insulating microspheres;
12-15 parts of glass powder;
0.7-1.0 part of functional auxiliary agent;
3-5 parts of an anti-cracking modifier.
3. The crack-resistant heat-insulating coating for the pipeline as claimed in claim 1, further comprising the following components in parts by weight:
6-8 parts of aerogel particles,
wherein, the aerogel particles are 200-300 meshes.
4. The crack-resistant heat-insulating coating for the pipeline as claimed in claim 1, further comprising the following components in parts by weight:
10-15 parts of anti-cracking modified fiber.
5. The anti-cracking heat-insulating coating for the pipeline as claimed in claim 4, wherein the anti-cracking modified fibers comprise porous glass fibers, xonotlite whisker fibers and calcium sulfate hemihydrate fibers, and the porous glass fibers, the xonotlite whisker fibers and the calcium sulfate hemihydrate fibers are mixed in a mass ratio of 1: 3-5: 6-8.
6. The crack-resistant heat-insulating coating for the pipeline as claimed in claim 5, wherein the porosity of the porous glass fiber is 15-20%.
7. The crack-resistant heat-insulating coating for the pipeline as claimed in claim 5, wherein the xonotlite whisker fiber is prepared by adopting the following scheme:
(1) according to the mass ratio of 1:3, mixing calcium oxide and calcium carbonate to obtain mixed particles, collecting the mixed particles, adding the mixed particles into deionized water according to the mass ratio of 1: 10-15, stirring, mixing, standing, sealing, and aging for 24 hours to obtain a mixed solution;
(2) respectively weighing 45-50 parts by weight of the mixed solution, 10-15 parts by weight of silica sol with the solid content of 15% and 3-5 parts by weight of modified additive, stirring and mixing, heating to 210-220 ℃ at a speed of 3 ℃/min, and stirring for 6-8 hours at a temperature of 3-5 MPa;
(3) and after stirring, standing and cooling to 50 ℃, filtering and collecting a filter cake, and drying at 55-60 ℃ for 6-8 hours to obtain the xonotlite whisker fiber.
8. The crack-resistant heat-insulating coating for the pipeline as claimed in claim 7, wherein the modifying additive is any one of cetyltrimethylammonium bromide or vanadium pentoxide.
9. The preparation method of the crack-resistant heat-insulating coating for the pipeline as claimed in any one of claims 1 to 8, characterized by comprising the following steps:
s1, placing the matrix resin, the functional auxiliary agent and the anti-cracking modifier into a stirring device according to the formula, and stirring and mixing to obtain matrix fluid;
and S2, stirring and mixing the hollow heat-preservation microspheres, the glass powder, the aerogel particles and the anti-cracking modified fibers according to a formula, stirring at a low speed for 5-10 min, collecting solid materials, adding the solid materials into the matrix liquid, and stirring at a high speed for 15-20 min to obtain the anti-cracking heat-preservation and heat-insulation coating for the pipeline.
10. The method for preparing the crack-resistant thermal insulation coating for the pipeline as claimed in claim 9, wherein in step S2, the low-speed stirring speed is 200r/min, and the high-speed stirring speed is 700 r/min.
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| CN118006159A (en) * | 2024-03-01 | 2024-05-10 | 沈阳欧施盾新材料科技有限公司 | Heat-proof material for repairing composite material product and application thereof |
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