CN118122592B - Cold spraying and electric arc spraying composite surface treatment method for stem cell storage tank - Google Patents
Cold spraying and electric arc spraying composite surface treatment method for stem cell storage tank Download PDFInfo
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- CN118122592B CN118122592B CN202410554515.XA CN202410554515A CN118122592B CN 118122592 B CN118122592 B CN 118122592B CN 202410554515 A CN202410554515 A CN 202410554515A CN 118122592 B CN118122592 B CN 118122592B
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- 238000005507 spraying Methods 0.000 title claims abstract description 133
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000003860 storage Methods 0.000 title claims abstract description 27
- 210000000130 stem cell Anatomy 0.000 title claims abstract description 22
- 239000002131 composite material Substances 0.000 title claims abstract description 16
- 238000004381 surface treatment Methods 0.000 title claims abstract description 4
- 238000010891 electric arc Methods 0.000 title claims description 66
- 238000010288 cold spraying Methods 0.000 title claims description 61
- 239000004642 Polyimide Substances 0.000 claims abstract description 32
- 229920001721 polyimide Polymers 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 14
- 239000000843 powder Substances 0.000 claims description 67
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 22
- 239000007921 spray Substances 0.000 claims description 21
- 238000004140 cleaning Methods 0.000 claims description 12
- 238000005498 polishing Methods 0.000 claims description 11
- 239000002904 solvent Substances 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 10
- 239000011261 inert gas Substances 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 6
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 2
- 229910010413 TiO 2 Inorganic materials 0.000 claims 2
- 244000137852 Petrea volubilis Species 0.000 claims 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 38
- 238000009413 insulation Methods 0.000 abstract description 18
- 239000000463 material Substances 0.000 abstract description 11
- 238000007751 thermal spraying Methods 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 238000013329 compounding Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000003116 impacting effect Effects 0.000 abstract description 2
- 238000005728 strengthening Methods 0.000 abstract 1
- 239000011159 matrix material Substances 0.000 description 11
- 238000000227 grinding Methods 0.000 description 9
- 238000012360 testing method Methods 0.000 description 9
- 238000009210 therapy by ultrasound Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 210000004504 adult stem cell Anatomy 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001671 embryonic stem cell Anatomy 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 210000002894 multi-fate stem cell Anatomy 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 210000001778 pluripotent stem cell Anatomy 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 210000003014 totipotent stem cell Anatomy 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
- B05D7/227—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes of containers, cans or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/12—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
- B05D3/0466—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being a non-reacting gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
- C23C4/11—Oxides
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/131—Wire arc spraying
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
The application relates to a composite spraying surface treatment method of a stem cell storage tank, which is particularly used for strengthening the stem cell storage tank and improving the heat insulation performance of the stem cell storage tank. Compared with the multilayer heat insulation structure in the prior art, the thermal spraying technology is adopted, the service life of the thermal spraying type heat insulation structure is prolonged, the structural damage is not easy to occur, and the heat insulation performance is more uniform. The thermal spraying coating is prepared by compounding polyimide and TiO2 raw materials, so that the heat insulation performance can be effectively improved, polyimide is used as a main material, the heat conductivity is low, holes can be formed in polyimide in the process of impacting the polyimide along with the introduction of low-melting-point oxide, and the porous structure can further reduce the heat conductivity.
Description
Technical Field
The application relates to a method for reinforcing a stem cell storage tank, which adopts a cold spraying composite arc spraying process and is particularly used for reinforcing the stem cell storage tank to improve the heat insulation performance of the stem cell storage tank.
Background
Stem cells are a class of pluripotent cells with self-replicating capacity. Under certain conditions, it can differentiate into a variety of functional cells. According to the developmental stage in which stem cells are located, embryonic stem cells and adult stem cells are classified into three categories, according to the developmental potential of stem cells: totipotent stem cells, pluripotent stem cells, and multipotent stem cells. Stem cells are an insufficiently differentiated, yet immature cell with the potential function of regenerating various tissues and organs and the human body, and are called "universal cells" in the medical community.
The stem cell storage tank is a common device in stem cell storage engineering, most of the existing stem cell storage tanks at present are composed of an inner liner and an outer liner, a vacuum interlayer is formed between the inner liner and the outer liner, the heat conduction coefficient is reduced through the vacuum interlayer, the low temperature of the inner liner is kept, stem cells to be stored are placed at the bottom of the inner liner, and the inner liner is filled with a refrigerating fluid for preserving the stem cells at low temperature. The vacuum interlayer is internally provided with a multi-layer heat insulation composite structure, and the multi-layer heat insulation composite structure comprises a reflecting layer, a spacer layer, a heat insulation layer and the like, wherein tight combination is not formed between the composite structures and the outer liner, and phenomena such as cracking and falling can occur under external force vibration and thermal shock. Resulting in deterioration of the heat insulating performance and affecting the storage condition of stem cells.
The cold spraying is to utilize high-pressure gas to carry powder particles into high-speed air flow, generate supersonic gas-solid two-phase flow through Laval pipe, and the powder particles collide with a substrate in a solid state at extremely high speed after being accelerated by a supersonic jet pipe, and deposit on the surface of a substrate to form a coating by generating strong plastic deformation. The heating temperature of the cold spraying is far lower than the melting point of the cold spraying, and the particles basically have no phenomena of oxidation, burning loss, grain growth and the like; the thermal effect of the coating on the substrate is small, so that the thermal stress between the coating and the substrate is reduced. Thermal spraying can enable raw materials to be sprayed onto the surface of a workpiece after being heated and melted, and is widely applied, and electric arc spraying is one of common thermal spraying.
The cold spraying composite arc spraying process is adopted, the two paths of spraying are independently carried out, the first path of system adopts polyimide as raw material powder for cold spraying, the second path of system adopts oxide powder for arc spraying, the service life of the multi-layer heat insulation structure in the prior art is prolonged, structural damage is not easy to occur, and the heat insulation performance is more uniform.
Disclosure of Invention
The invention provides a method for enhancing a stem cell storage tank, which adopts a cold spraying composite arc spraying process to solve the technical problem of heat insulation performance degradation of the stem cell storage tank in the prior art.
The technical scheme provided by the invention is as follows:
The method comprises the following steps:
polishing and cleaning the inner surface of the outer liner substrate of the storage tank, and preheating the outer liner substrate to 120 ℃ before spraying;
The spraying is carried out simultaneously by adopting two paths of systems, wherein the first path of system adopts polyimide as raw material powder for cold spraying, the grain diameter of the polyimide powder is 15-45 mu m, the cold spraying distance is 20-25mm, the powder feeding amount of the cold spraying is 4-8g/min, the cold spraying pressure is 7-9MPa, and the moving speed of a cold spraying spray gun is 15-25mm/s; the second path of system adopts oxide powder to carry out electric arc spraying, the grain diameter of TiO2 powder is 25-30 microns, the electric arc spraying voltage is 25-30V, the electric arc spraying current is 150-180A, the electric arc spraying distance is 20-25mm, the electric arc spraying powder feeding amount is 0.5-1g/min, and the moving speed of an electric arc spraying spray gun is 15-25mm/s.
Further, inert gas is used for protection during spraying.
Still further, the inner surface was sanded with 300# sandpaper.
Further, the mixture was subjected to ultrasonic cleaning in an ethanol solvent at 60kHz for 25 minutes.
Further, after washing, the mixture was dried at 60℃for 4 hours.
Further, the above process is repeated 8 to 10 times on the sample surface.
Further, the spray arc spray coating pressure was 0.5MPa.
Firstly, polishing and cleaning the inner surface of the outer container base material of the storage tank. Grinding the inner surface with 300# abrasive paper, putting into ethanol solvent, performing ultrasonic treatment at 60kHz for 25min, and drying at 60deg.C for 4 hr. Preheating the outer liner matrix to 120 ℃ before spraying.
The application combines cold spraying and electric arc thermal spraying by adopting a composite spraying technology, and has longer service life, less structural damage and more uniform heat insulation performance compared with the multilayer heat insulation structure in the prior art. The spray coating is prepared by compounding polyimide and titanium dioxide raw materials, so that the heat insulation performance can be effectively improved, polyimide is used as a main material, the heat conductivity is low, holes can be formed in polyimide in the process of impacting the polyimide along with the introduction of low-melting-point oxide, and the porous structure can further reduce the heat conductivity. Because polyimide density is lower, the electric arc spraying pressure is higher, and the energy input of the spraying end is reduced by preheating the matrix.
The reinforced stem cell storage tank inner wall is prepared by adopting the cold spraying composite arc spraying process, a heat insulation layer which is tightly combined with a matrix is formed, the volume is reduced compared with a traditional heat insulation structure, the service life is prolonged, and the heat insulation performance is optimized through adjustment of preparation parameters.
Detailed Description
Example 1:
Polishing and cleaning the inner surface of the outer container base material of the storage tank. Grinding the inner surface with 300# abrasive paper, putting into ethanol solvent, performing ultrasonic treatment at 60kHz for 25min, and drying at 60deg.C for 4 hr. Preheating the outer liner matrix to 120 ℃ before spraying.
The spraying is performed simultaneously by adopting two paths of systems. The first system adopts polyimide as raw material powder for cold spraying, the grain diameter of the polyimide powder is 30 mu m, the cold spraying distance is 20mm, the powder feeding amount of cold spraying is 4g/min, the cold spraying pressure is 8MPa, and the moving speed of a cold spraying spray gun is 20mm/s; the second path adopts TiO2 powder for electric arc spraying, the grain size of the TiO2 powder is 30 microns, the spraying voltage is 25V, the electric arc spraying current is 150A, the spraying pressure of the electric arc spraying is 0.5MPa, the spraying distance of the electric arc spraying is 20mm, the powder feeding amount of the electric arc spraying is 0.5g/min, and the moving speed of an electric arc spraying spray gun is 20mm/s. The process was repeated 10 times on the sample surface using inert gas protection during the spraying process.
Performance testing was performed on the samples obtained:
The thermal conductivity is measured by a guard plate method according to the principle of steady-state thermal conductivity differential equation. And placing the same two samples between the two cold plates and the central heating plate of the thermal conductivity meter to form a laminated structure of the cold plates, the samples, the heating plates, the samples and the cold plates. The structure is adopted to ensure that the heat flows through the two samples are identical, the protection structures are arranged around the sample and the hot plate to prevent radial transmission of the heat flows, the axial one-dimensional heat conduction condition is met, a stable temperature difference delta T (delta T=T2-T1) can be generated on the upper surface and the lower surface of the sample after the temperature distribution on the sample to be measured is stable, the heat conductivity coefficient of the sample is measured through measuring the heat flows of the sample and the temperature gradient along the heat flow direction, wherein the cold source is liquid nitrogen cooling, and the hot plate is at room temperature.
Example 2:
Polishing and cleaning the inner surface of the outer container base material of the storage tank. Grinding the inner surface with 300# abrasive paper, putting into ethanol solvent, performing ultrasonic treatment at 60kHz for 25min, and drying at 60deg.C for 4 hr. Preheating the outer liner matrix to 120 ℃ before spraying.
The spraying is performed simultaneously by adopting two paths of systems. The first system adopts polyimide as raw material powder for cold spraying, the grain diameter of the polyimide powder is 30 mu m, the cold spraying distance is 25mm, the powder feeding amount of cold spraying is 8g/min, the cold spraying pressure is 9MPa, the powder supply amount is 25mm/s of the moving speed of the spray gun; the second path adopts TiO2 powder for electric arc spraying, the grain size of the TiO2 powder is 25 microns, the spraying voltage is 30V, the electric arc spraying current is 180A, the spraying pressure of the electric arc spraying is 0.5MPa, the spraying distance of the electric arc spraying is 25mm, the powder feeding amount of the electric arc spraying is 1g/min, and the moving speed of an electric arc spraying spray gun is 25mm/s. The process was repeated 10 times on the sample surface using inert gas protection during the spraying process.
The test was then performed with reference to example 1.
Example 3:
Firstly, polishing and cleaning the inner surface of the outer container base material of the storage tank. Grinding the inner surface with 300# abrasive paper, putting into ethanol solvent, performing ultrasonic treatment at 60kHz for 25min, and drying at 60deg.C for 4 hr. Preheating the outer liner matrix to 120 ℃ before spraying.
The spraying is performed simultaneously by adopting two paths of systems. The first system adopts polyimide as raw material powder for cold spraying, the grain diameter of the polyimide powder is 30 mu m, the cold spraying distance is 25mm, the powder feeding amount of cold spraying is 6g/min, the cold spraying pressure is 8MPa, and the moving speed of a cold spraying spray gun is 25mm/s; the second path adopts TiO2 powder for electric arc spraying, the grain size of the TiO2 powder is 28 microns, the spraying voltage is 26V, the electric arc spraying current is 160A, the spraying pressure of the electric arc spraying is 0.5MPa, the spraying distance of the electric arc spraying is 25mm, the powder feeding amount of the electric arc spraying is 0.8g/min, and the moving speed of an electric arc spraying spray gun is 25mm/s. The process was repeated 10 times on the sample surface using inert gas protection during the spraying process.
The test was then performed with reference to example 1.
Comparative example 1:
Firstly, polishing and cleaning the inner surface of the outer container base material of the storage tank. Grinding the inner surface with 300# abrasive paper, putting into ethanol solvent, performing ultrasonic treatment at 60kHz for 25min, and drying at 60deg.C for 4 hr. Preheating the outer liner matrix to 120 ℃ before spraying.
The spraying is performed simultaneously by adopting two paths of systems. The first system adopts polyimide as raw material powder for cold spraying, the grain diameter of the polyimide powder is 30 mu m, the cold spraying distance is 25mm, the powder feeding amount of cold spraying is 10g/min, the cold spraying pressure is 8MPa, and the moving speed of a cold spraying spray gun is 25mm/s; the second path adopts TiO2 powder for electric arc spraying, the grain size of the TiO2 powder is 28 microns, the spraying voltage is 26V, the electric arc spraying current is 160A, the spraying pressure of the electric arc spraying is 0.5MPa, the spraying distance of the electric arc spraying is 25mm, the powder feeding amount of the electric arc spraying is 0.8g/min, and the moving speed of an electric arc spraying spray gun is 25mm/s. The process was repeated 10 times on the sample surface using inert gas protection during the spraying process.
The test was then performed with reference to example 1.
Comparative example 2:
Firstly, polishing and cleaning the inner surface of the outer container base material of the storage tank. Grinding the inner surface with 300# abrasive paper, putting into ethanol solvent, performing ultrasonic treatment at 60kHz for 25min, and drying at 60deg.C for 4 hr. Preheating the outer liner matrix to 120 ℃ before spraying.
The spraying is performed simultaneously by adopting two paths of systems. The first system adopts polyimide as raw material powder for cold spraying, the grain diameter of the polyimide powder is 30 mu m, the cold spraying distance is 25mm, the powder feeding amount of cold spraying is 6g/min, the cold spraying pressure is 8MPa, and the moving speed of a cold spraying spray gun is 25mm/s; the second path adopts TiO2 powder for electric arc spraying, the grain size of the TiO2 powder is 28 microns, the spraying voltage is 26V, the electric arc spraying current is 160A, the spraying pressure of the electric arc spraying is 0.5MPa, the spraying distance of the electric arc spraying is 25mm, the powder feeding amount of the electric arc spraying is 0.4g/min, and the moving speed of an electric arc spraying spray gun is 25mm/s. The process was repeated 10 times on the sample surface using inert gas protection during the spraying process.
The test was then performed with reference to example 1.
Comparative example 3:
Firstly, polishing and cleaning the inner surface of the outer container base material of the storage tank. Grinding the inner surface with 300# abrasive paper, putting into ethanol solvent, performing ultrasonic treatment at 60kHz for 25min, and drying at 60deg.C for 4 hr. Preheating the outer liner matrix to 120 ℃ before spraying.
The spraying is performed simultaneously by adopting two paths of systems. The first system adopts polyimide as raw material powder for cold spraying, the grain diameter of the polyimide powder is 30 mu m, the cold spraying distance is 25mm, the powder feeding amount of cold spraying is 6g/min, the cold spraying pressure is 8MPa, and the moving speed of a cold spraying spray gun is 25mm/s; the second path adopts TiO2 powder for electric arc spraying, the grain size of the TiO2 powder is 28 microns, the spraying voltage is 26V, the electric arc spraying current is 160A, the spraying pressure of the electric arc spraying is 0.5MPa, the spraying distance of the electric arc spraying is 25mm, the powder feeding amount of the electric arc spraying is 1.5g/min, and the moving speed of an electric arc spraying spray gun is 25mm/s. The process was repeated 10 times on the sample surface using inert gas protection during the spraying process.
The test was then performed with reference to example 1.
Comparative example 4:
Firstly, polishing and cleaning the inner surface of the outer container base material of the storage tank. Grinding the inner surface with 300# abrasive paper, putting into ethanol solvent, performing ultrasonic treatment at 60kHz for 25min, and drying at 60deg.C for 4 hr. Preheating the outer liner matrix to 120 ℃ before spraying.
The spraying is performed simultaneously by adopting two paths of systems. The first system adopts polyimide as raw material powder for cold spraying, the grain diameter of the polyimide powder is 30 mu m, the cold spraying distance is 25mm, the powder feeding amount of cold spraying is 3g/min, the cold spraying pressure is 8MPa, and the moving speed of a cold spraying spray gun is 25mm/s; the second path adopts TiO2 powder for electric arc spraying, the grain size of the TiO2 powder is 28 microns, the spraying voltage is 26V, the electric arc spraying current is 160A, the spraying pressure of the electric arc spraying is 0.5MPa, the spraying distance of the electric arc spraying is 25mm, the powder feeding amount of the electric arc spraying is 0.8g/min, and the moving speed of an electric arc spraying spray gun is 25mm/s. The process was repeated 10 times on the sample surface using inert gas protection during the spraying process.
The test was then performed with reference to example 1.
Comparative example 5:
Firstly, polishing and cleaning the inner surface of the outer container base material of the storage tank. Grinding the inner surface with 300# abrasive paper, putting into ethanol solvent, performing ultrasonic treatment at 60kHz for 25min, and drying at 60deg.C for 4 hr. Preheating the outer liner matrix to 120 ℃ before spraying.
The spraying is performed simultaneously by adopting two paths of systems. The first system adopts polyimide as raw material powder for cold spraying, the grain diameter of the polyimide powder is 30 mu m, the cold spraying distance is 25mm, the powder feeding amount of cold spraying is 6g/min, the cold spraying pressure is 8MPa, and the moving speed of a cold spraying spray gun is 25mm/s; the second path adopts TiO2 powder for electric arc spraying, the grain size of the TiO2 powder is 28 microns, the spraying voltage is 26V, the electric arc spraying current is 160A, the spraying pressure of the electric arc spraying is 0.5MPa, the spraying distance of the electric arc spraying is 25mm, the powder feeding amount of the electric arc spraying is 0.8g/min, and the moving speed of an electric arc spraying spray gun is 25mm/s. The above process was repeated 10 times on the sample surface.
The test was then performed with reference to example 1.
Table 1 test results
For controlling the powder feeding amount, if the oxide particles are too many, the oxide can form a continuous whole body to form a heat conducting channel; the insufficient amount of powder can lead to insufficient holes and poor heat resistance. If the protective atmosphere is cancelled, the polyimide is oxidized, and the performance of the polyimide is affected.
Claims (7)
1. The composite spraying surface treatment method of the stem cell storage tank is characterized by comprising the following steps of:
Polishing and cleaning the inner surface of the outer liner substrate of the storage tank, and preheating the outer liner substrate before composite spraying;
The composite spraying is a cold spraying composite electric arc spraying process, two paths of systems are adopted to be carried out simultaneously, polyimide is adopted as raw material powder for cold spraying in a first path of system, the particle size of the polyimide powder is 15-45 mu m, the cold spraying distance is 20-25mm, the powder feeding amount of the cold spraying is 4-8g/min, the cold spraying pressure is 7-9MPa, and the moving speed of a cold spraying spray gun is 15-25mm/s; the second path of system adopts TiO 2 powder for electric arc spraying, the particle size of the TiO 2 powder is 25-30 microns, the electric arc spraying voltage is 25-30V, the electric arc spraying current is 150-180A, the electric arc spraying distance is 20-25mm, the electric arc spraying powder feeding amount is 0.5-1g/min, and the moving speed of an electric arc spraying spray gun is 15-25mm/s;
Inert gas is adopted for protection in the spraying process.
2. The method of claim 1, wherein the inner surface is sanded with No. 300 sand paper.
3. The method of claim 1, wherein the ultrasonic cleaning is performed in an ethanol solvent at 60kHz for 25 minutes.
4. A method according to claim 3, wherein the cleaning is followed by drying at 60 ℃ for 4 hours.
5. The method of claim 1, wherein the process is repeated 8-10 times on the surface of the sample.
6. The method of claim 1, wherein the arc spraying pressure is 0.5MPa.
7. The method of claim 1, wherein the outer liner substrate is preheated to 120 ℃ prior to composite spraying.
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| CN101239518A (en) * | 2007-12-26 | 2008-08-13 | 苏州纳米技术与纳米仿生研究所 | Composite coating material and preparation thereof |
| CN105838239A (en) * | 2016-04-13 | 2016-08-10 | 中国科学院宁波材料技术与工程研究所 | Polyimide composite coating and preparation method thereof and application thereof |
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| WO2006074550A1 (en) * | 2005-01-14 | 2006-07-20 | National Research Council Of Canada | Implantable biomimetic prosthetic bone |
| JP2013047359A (en) * | 2011-08-29 | 2013-03-07 | Kinzoku Giken Kk | Method for forming film of metal product |
| KR101569807B1 (en) * | 2015-05-07 | 2015-11-18 | 한국생산기술연구원 | Dual spray casting apparatus |
| CN106498333A (en) * | 2016-11-15 | 2017-03-15 | 北京联合涂层技术有限公司 | Pan Electromagnetic heating coating and its preparation method |
| JP7015199B2 (en) * | 2018-03-28 | 2022-02-02 | 株式会社フジミインコーポレーテッド | Method for manufacturing thermal spray material and coating film |
| CN110158134A (en) * | 2019-06-10 | 2019-08-23 | 陕西天元智能再制造股份有限公司 | A kind of workpiece surface processing method that cold spraying is combined with differential arc oxidation |
| CN114032543A (en) * | 2021-11-05 | 2022-02-11 | 江苏理工学院 | Active HA coating prepared by combining laser cladding and cold spraying and preparation method thereof |
| CN116463628A (en) * | 2023-03-30 | 2023-07-21 | 航天材料及工艺研究所 | Resin matrix composite surface electromagnetic shielding coating and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101239518A (en) * | 2007-12-26 | 2008-08-13 | 苏州纳米技术与纳米仿生研究所 | Composite coating material and preparation thereof |
| CN105838239A (en) * | 2016-04-13 | 2016-08-10 | 中国科学院宁波材料技术与工程研究所 | Polyimide composite coating and preparation method thereof and application thereof |
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