CN107541936B - A kind of high-temperature-resistant and anti-corrosion coating metal fibrofelt and preparation method thereof - Google Patents
A kind of high-temperature-resistant and anti-corrosion coating metal fibrofelt and preparation method thereof Download PDFInfo
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- CN107541936B CN107541936B CN201710701280.2A CN201710701280A CN107541936B CN 107541936 B CN107541936 B CN 107541936B CN 201710701280 A CN201710701280 A CN 201710701280A CN 107541936 B CN107541936 B CN 107541936B
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Abstract
The invention discloses a kind of high-temperature-resistant and anti-corrosion coating metal fibrofelts, including metal fiber felt substrate and the nanometer silicon dioxide particle clad for being coated on metal fiber felt substrate surface, the invention also discloses the preparation methods of high-temperature-resistant and anti-corrosion coating metal fibrofelt, nano SiO 2 particle dispersion liquid 50%~60%, polystyrene nanoparticles dispersion liquid 5%~20%, water 20%~45% are weighed first, in accordance with volume fraction, it is uniformly mixed, obtain coating solution, then metal fiber felt is immersed in the coating solution, carries out electrophoretic process；The metal fiber felt after electrophoretic process is finally subjected to the cooling metal fiber felt for obtaining being coated with nanometer silicon dioxide particle clad after drying twice, the present invention solves metal fiber felt organic coating non-refractory existing in the prior art, and inorganic coating film forming is poor, binding force is weak, the susceptible to plugging problem of hole.
Description
Technical field
The invention belongs to the high-temperature-resistant and anti-corrosion coating technology fields of metal fiber felt, and in particular to a kind of anti-corruption of high temperature resistant
Erosion resisting coating metal fiber felt, the invention further relates to the preparation methods of high-temperature-resistant and anti-corrosion coating metal fibrofelt.
Background technique
The exclusive heat-resisting quantity of metal fiber felt can be directly used for the purification of high-temperature dusty gas, so that waste heat is available
Recycling saves the energy, while not will cause secondary pollution.Metal fiber felt is generallyd use to be prepared with metal material resistant to high temperature
It forms, such as 316L, 310S, FeCrAl etc., using temperature up to 100 DEG C.But present many operating condition fluctuations of service, hold
Easily there is the exceeded operating condition of smoke components, the harmful components in flue gas can generate chemical reaction with filtrate, such as Cl and S2- ion, make
At the mechanical performance decline of filtrate, the pernicious gas in broken invalid, especially dust pelletizing system can be sent out in the lower situation of temperature
Raw dew condensation phenomenon, generates HCl or H2S corrosive liquid, aggravates the corrosion to metal filter material.Metallic fiber is not yet solved in industry at present
The method that felt uses under with corrosive medium high-temperature flue gas environment.
Summary of the invention
The object of the present invention is to provide a kind of high-temperature-resistant and anti-corrosion coating metal fibrofelts, solve and exist in the prior art
Metal fiber felt organic coating non-refractory, inorganic coating film forming is poor, binding force is weak, the susceptible to plugging problem of hole.
It is a further object of the present invention to provide a kind of preparation methods of high-temperature-resistant and anti-corrosion coating metal fibrofelt.
First technical solution of the present invention is a kind of high-temperature-resistant and anti-corrosion coating metal fibrofelt, including metal
Fibrofelt substrate and the nanometer silicon dioxide particle clad for being coated on metal fiber felt substrate surface.
Second technical solution of the present invention is a kind of preparation side of high-temperature-resistant and anti-corrosion coating metal fibrofelt
Method is specifically implemented according to the following steps:
Step 1 weighs nano SiO 2 particle dispersion liquid 50%~60%, pipe/polyhenylethylene nano according to volume fraction
Grain dispersion liquid 5%~20%, water 20%~45%, are uniformly mixed, obtain coating solution；
Metal fiber felt is immersed in the coating solution that the step 1 obtains by step 2, carries out electrophoretic process；
Step 3 obtains cooling after the metal fiber felt progress drying twice after electrophoretic process in step 2 to be coated with nanometer
The metal fiber felt of silica dioxide granule clad.
The characteristics of the second technical solution that the present invention uses, also resides in,
In step 1 nano SiO 2 particle dispersion liquid by the way that nano SiO 2 particle is dispersed, emulsion polymerization, suspension
Polymerization obtains, and the mass fraction of nano SiO 2 particle dispersion liquid is 20%~35%.
The partial size of nano SiO 2 particle is 50~100nm in nano SiO 2 particle dispersion liquid in step 1.
In step 1 polystyrene nanoparticles dispersion liquid by the way that polystyrene is dispersed, emulsion polymerization, suspension polymerisation obtains
, the mass fraction of polystyrene nanoparticles dispersion liquid is 5%~15%.
The partial size of polystyrene nanoparticles is 200~500nm in polystyrene nanoparticles dispersion liquid in step 1.
It is used when nano SiO 2 particle dispersion liquid, polystyrene nanoparticles dispersion liquid, water are uniformly mixed in step 1
The mixing of ultrasonic disperse technology, the purpose using ultrasonic disperse are that nano SiO 2 particle and polystyrene nanoparticles is allowed to mix
Uniformly.
Carrying out electrophoretic process in step 2 in such a way that metal fiber felt is as anode, control electrophoretic voltage is 60~
100V, electrophoresis time are 5~10min, and electrophoresis temperature is 23-27 DEG C.
The drying temperature of first time is 200~250 DEG C in step 3, keeps the temperature 20~40 minutes.
450 DEG C~650 DEG C of secondary drying temperature in step 3 keep the temperature 1~4 hour.
The invention has the advantages that high-temperature-resistant and anti-corrosion coating metal fibrofelt, coating substantially will be in metal fiber felts
All cladding (different from the coatings of only outer surface) of all fibres surface, the two has good combination power, and resistance to dust particles wash away mill
Damage；Metallic fiber surface covering is directly contacted with corrosive medium in filtering use process, so that metallic fiber base greatly improved
The high-temperature-resistant and anti-corrosion ability of material；In the preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt, using anodic electrophoresis mode
Nano particle can be uniformly coated on to fibrofelt surface, while not will cause the blocking of hole；By adjusting electrophoretic voltage
With the matching of electrophoresis time, the thickness of coating can be accurately controlled；Nano SiO 2 particle is evenly distributed after high-temperature process,
It generates and merges into each other between grain, compactness is high.
Detailed description of the invention
Fig. 1 is metal fiber felt surface scan electron microscope before the present invention coats；
Fig. 2 is metal fiber felt surface scan electron microscope after present invention coating.
Specific embodiment
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
A kind of high-temperature-resistant and anti-corrosion coating metal fibrofelt of the present invention coats preceding metal fiber felt surface scan electron microscope such as
Shown in Fig. 1, metal fiber felt surface scan Electronic Speculum graph structure after coating is as shown in Fig. 2, include metal fiber felt substrate and cladding
In the nanometer silicon dioxide particle clad of metal fiber felt substrate surface, wherein nanometer silicon dioxide particle is uniform, densification
It is coated on fiber surface.Surface is existed only in different from conventional coatings, the coating is substantially by all fibres table in metal fiber felt
Face carries out whole claddings, and coating and matrix have good combination power.
A kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt, is specifically implemented according to the following steps:
Step 1 weighs nano SiO 2 particle dispersion liquid 50%~60%, pipe/polyhenylethylene nano according to volume fraction
Grain dispersion liquid 5%~20%, water 20%~45%, are uniformly mixed, obtain coating solution, wherein nano SiO 2 particle point
Dispersion liquid by the way that nano SiO 2 particle is dispersed, emulsion polymerization, suspension polymerisation obtain, nano SiO 2 particle dispersion liquid
Mass fraction is 20%~35%, in nano SiO 2 particle dispersion liquid the partial size of nano SiO 2 particle be 50~
100nm, polystyrene nanoparticles dispersion liquid by the way that polystyrene is dispersed, emulsion polymerization, suspension polymerisation obtain, polystyrene
The mass fraction of nanoparticulate dispersion is 5%~15%, polystyrene nanoparticles in polystyrene nanoparticles dispersion liquid
Partial size be 200~500nm, nano SiO 2 particle dispersion liquid, polystyrene nanoparticles dispersion liquid, water be uniformly mixed when
It is mixed using ultrasonic disperse technology, the purpose using ultrasonic disperse is to allow nano SiO 2 particle and polystyrene nanoparticles
It is uniformly mixed；
Nano particle in step 2, the coating solution obtained due to step 1 has elecrtonegativity, so by metallic fiber
Felt is immersed in the coating solution that step 1 obtains, and carries out electrophoretic process, and the coating solution for usually obtaining step 1 pours into electricity
Swim in slot, metal fiber felt needs are totally submerged in the solution of electrophoresis tank, and metal fiber felt away from upper liquid identity distance from being greater than
5cm, carries out electrophoretic process in such a way that metal fiber felt is as anode, and control electrophoretic voltage is 60~100V, electrophoresis time
For 5~10min, electrophoresis temperature is 23-27 DEG C；
Step 3 obtains cooling after the metal fiber felt progress drying twice after electrophoretic process in step 2 to be coated with nanometer
The metal fiber felt of silica dioxide granule clad, wherein the drying temperature of first time is 200~250 DEG C, keeps the temperature 20~40 points
Clock, keeps the temperature 1~4 hour by 450 DEG C~650 DEG C of secondary drying temperature, and the purpose of drying is to allow metal fiber felt table for the first time
Polystyrene nanoparticles between face and nano silica are melted so that the arrangement of nano SiO 2 particle even compact with
And it is adhered to fiber surface；The purpose of second of high-temperature process is the organic polystyrene of removal, so that nano SiO 2 particle
Between generate and merge into each other, improve coating compactness, while increasing the binding force of nanometer silicon dioxide particle and metallic fiber.
Embodiment 1
A kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt, is specifically implemented according to the following steps:
Step 1 weighs nano SiO 2 particle dispersion liquid 60%, polystyrene nanoparticles dispersion according to volume fraction
Liquid 8%, water 32% are uniformly mixed, obtain coating solution, wherein nano SiO 2 particle dispersion liquid is by by silica
Nano particle dispersion, emulsion polymerization, suspension polymerisation obtain, and the mass fraction of nano SiO 2 particle dispersion liquid is 30%, two
The partial size of nano SiO 2 particle is 60nm in silica nano particle dispersion liquid, is gathered in polystyrene nanoparticles dispersion liquid
The partial size of styrene nano particle is 250nm.Polystyrene nanoparticles dispersion liquid by the way that polystyrene is dispersed, lotion is gathered
It closes, suspension polymerisation acquisition, the mass fraction of polystyrene nanoparticles dispersion liquid is 10%, nano SiO 2 particle dispersion
Liquid, polystyrene nanoparticles dispersion liquid, water are mixed when being uniformly mixed using ultrasonic disperse technology, using the purpose of ultrasonic disperse
It is that nano SiO 2 particle and polystyrene nanoparticles is allowed to be uniformly mixed；
Nano particle in step 2, the coating solution obtained due to step 1 has elecrtonegativity, so by metallic fiber
Felt is immersed in the coating solution that step 1 obtains, and carries out electrophoretic process, and the coating solution for usually obtaining step 1 pours into electricity
Swim in slot, metal fiber felt needs are totally submerged in the solution of electrophoresis tank, and metal fiber felt away from upper liquid identity distance from being greater than
5cm carries out electrophoretic process in such a way that 316L metal fiber felt is as anode, and control electrophoretic voltage is 60V, and electrophoresis time is
8min, electrophoresis temperature are 25 DEG C；
Step 3 obtains cooling after the metal fiber felt progress drying twice after electrophoretic process in step 2 to be coated with nanometer
The metal fiber felt of silica dioxide granule clad, wherein the drying temperature of first time is 220 DEG C, keeps the temperature 25 minutes, second
500 DEG C of drying temperature, keep the temperature 2 hours.For the first time the purpose of drying be allow metal fiber felt surface and nano silica it
Between polystyrene nanoparticles melt so that the arrangement of nano SiO 2 particle even compact and being adhered to fiber surface；
The purpose of second of high-temperature process is the organic polystyrene of removal, is merged into each other so that generating between nano SiO 2 particle,
Coating compactness is improved, while increasing the binding force of nanometer silicon dioxide particle and metallic fiber.
It is observed through scanning electron microscope, which completely coats fiber in 316L metal fiber felt, pristine fibre felt
As shown in table 1 with coating 316L fibrofelt performance test comparing result, compared with pristine fibre felt, 316L fibrofelt is saturating after coating
Gas is held essentially constant, after high-temperature oxydation, pristine fibre felt and coating 316L fibrofelt is molten for 25%HCl in concentration
Its weight-loss ratio is tested after corroding 20h in liquid and 25%H2SO4 solution respectively, the results showed that the corrosion resistance ratio of coated fiber felt
Fibrinogen felt is significantly increased.
1 pristine fibre felt of table and coating 316L fibrofelt test result
Embodiment 2
A kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt, is specifically implemented according to the following steps:
Step 1 weighs nano SiO 2 particle dispersion liquid 50%, polystyrene nanoparticles dispersion according to volume fraction
Liquid 14%, water 36% are uniformly mixed, obtain coating solution, wherein nano SiO 2 particle dispersion liquid is by by silica
Nano particle dispersion, emulsion polymerization, suspension polymerisation obtain, and the mass fraction of nano SiO 2 particle dispersion liquid is 25%, two
The partial size of nano SiO 2 particle is 80nm in silica nano particle dispersion liquid, and polystyrene nanoparticles dispersion liquid passes through
Polystyrene dispersion, emulsion polymerization, suspension polymerisation are obtained, the mass fraction of polystyrene nanoparticles dispersion liquid is 15%,
The partial size of polystyrene nanoparticles is 320nm in polystyrene nanoparticles dispersion liquid.Nano SiO 2 particle dispersion liquid,
Polystyrene nanoparticles dispersion liquid, water are mixed when being uniformly mixed using ultrasonic disperse technology, are using the purpose of ultrasonic disperse
Nano SiO 2 particle and polystyrene nanoparticles is allowed to be uniformly mixed；
Nano particle in step 2, the coating solution obtained due to step 1 has elecrtonegativity, so by metallic fiber
Felt is immersed in the coating solution that step 1 obtains, and carries out electrophoretic process, and the coating solution for usually obtaining step 1 pours into electricity
Swim in slot, metal fiber felt needs are totally submerged in the solution of electrophoresis tank, and metal fiber felt away from upper liquid identity distance from being greater than
5cm carries out electrophoretic process in such a way that 310S metal fiber felt is as anode, and control electrophoretic voltage is 80V, and electrophoresis time is
6min, electrophoresis temperature are 26 DEG C；
Step 3 obtains cooling after the metal fiber felt progress drying twice after electrophoretic process in step 2 to be coated with nanometer
The metal fiber felt of silica dioxide granule clad, wherein the drying temperature of first time is 250 DEG C, keeps the temperature 40 minutes, second
550 DEG C of drying temperature, keep the temperature 3 hours.For the first time the purpose of drying be allow metal fiber felt surface and nano silica it
Between polystyrene nanoparticles melt so that the arrangement of nano SiO 2 particle even compact and being adhered to fiber surface；
The purpose of second of high-temperature process is the organic polystyrene of removal, is merged into each other so that generating between nano SiO 2 particle,
Coating compactness is improved, while increasing the binding force of nanometer silicon dioxide particle and metallic fiber.
It is observed through scanning electron microscope, which completely coats fiber in 310S metal fiber felt, pristine fibre felt
As shown in table 2 with the comparison of coating 310S fibrofelt the performance test results, compared with pristine fibre felt, 310S fibrofelt is saturating after coating
Gas is held essentially constant, after high-temperature oxydation, by original and coating 310S fibrofelt concentration be 25%HCl solution and
Its weight-loss ratio is tested after corroding 20h in 25%H2SO4 solution respectively, the results showed that the corrosion resistance of coated fiber felt compares fibril
Dimension felt is significantly increased.
2 pristine fibre felt of table and coating 310S fibrofelt test result
Embodiment 3
A kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt, is specifically implemented according to the following steps:
Step 1 weighs nano SiO 2 particle dispersion liquid 55%, polystyrene nanoparticles dispersion according to volume fraction
Liquid 20%, water 25% are uniformly mixed, obtain coating solution, wherein nano SiO 2 particle dispersion liquid is by by silica
Nano particle dispersion, emulsion polymerization, suspension polymerisation obtain, and the mass fraction of nano SiO 2 particle dispersion liquid is 30%, two
The partial size of nano SiO 2 particle is 80nm in silica nano particle dispersion liquid, and polystyrene nanoparticles dispersion liquid passes through
Polystyrene dispersion, emulsion polymerization, suspension polymerisation are obtained, the mass fraction of polystyrene nanoparticles dispersion liquid is 18%,
The partial size of polystyrene nanoparticles is 450nm in polystyrene nanoparticles dispersion liquid.Nano SiO 2 particle dispersion liquid,
Polystyrene nanoparticles dispersion liquid, water are mixed when being uniformly mixed using ultrasonic disperse technology, are using the purpose of ultrasonic disperse
Nano SiO 2 particle and polystyrene nanoparticles is allowed to be uniformly mixed；
Nano particle in step 2, the coating solution obtained due to step 1 has elecrtonegativity, so by metallic fiber
Felt is immersed in the coating solution that step 1 obtains, and carries out electrophoretic process, and the coating solution for usually obtaining step 1 pours into electricity
Swim in slot, metal fiber felt needs are totally submerged in the solution of electrophoresis tank, and metal fiber felt away from upper liquid identity distance from being greater than
5cm, carries out electrophoretic process in such a way that FeCrAl metal fiber felt is as anode, and control electrophoretic voltage is 70V, electrophoresis time
For 10min, electrophoresis temperature is 27 DEG C；
Step 3 obtains cooling after the metal fiber felt progress drying twice after electrophoretic process in step 2 to be coated with nanometer
The metal fiber felt of silica dioxide granule clad, wherein the drying temperature of first time is 230 DEG C, keeps the temperature 30 minutes, second
600 DEG C of drying temperature, keep the temperature 4 hours.For the first time the purpose of drying be allow metal fiber felt surface and nano silica it
Between polystyrene nanoparticles melt,
So that fiber surface is arranged and be adhered to nano SiO 2 particle even compact；The mesh of second of high-temperature process
Be the organic polystyrene of removal merged into each other so that being generated between nano SiO 2 particle, improve coating compactness, simultaneously
Increase the binding force of nanometer silicon dioxide particle and metallic fiber.
It is observed through scanning electron microscope, which completely coats fiber in FeCrAl metal fiber felt, pristine fibre
As shown in table 3, compared with pristine fibre felt, FeCrAl is fine after coating for felt and the comparison of coating FeCrAl fibrofelt the performance test results
Dimension felt gas permeability is held essentially constant, and in concentration is 25%HCl by original and coating FeCrAl fibrofelt after high-temperature oxydation
Its weight-loss ratio is tested after corroding 20h in solution and 25%H2SO4 solution respectively, the results showed that the corrosion resistance of coated fiber felt
It is significantly increased than fibrinogen felt.
3 pristine fibre felt of table and coating FeCrAl fibrofelt test result
Claims (9)
1. a kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt, which is characterized in that high-temperature-resistant and anti-corrosion coating gold
Belong to fibrofelt, is coated including metal fiber felt substrate and the nanometer silicon dioxide particle for being coated on metal fiber felt substrate surface
Layer, is specifically implemented according to the following steps:
Step 1 weighs nano SiO 2 particle dispersion liquid 50%~60%, polystyrene nanoparticles point according to volume fraction
Dispersion liquid 5%~20%, water 20%~45% are uniformly mixed, obtain coating solution；
Metal fiber felt is immersed in the coating solution that the step 1 obtains by step 2, carries out electrophoretic process；
Step 3 obtains cooling after the metal fiber felt progress drying twice after electrophoretic process in step 2 to be coated with nano-silica
The metal fiber felt of silicon carbide particle clad.
2. a kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt according to claim 1, which is characterized in that
In the step 1 nano SiO 2 particle dispersion liquid by the way that nano SiO 2 particle is dispersed, emulsion polymerization, suspension polymerisation
It obtains, the mass fraction of nano SiO 2 particle dispersion liquid is 20%~35%.
3. a kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt according to claim 1, which is characterized in that
The partial size of nano SiO 2 particle is 50~100nm in nano SiO 2 particle dispersion liquid in the step 1.
4. a kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt according to claim 1, which is characterized in that
In the step 1 polystyrene nanoparticles dispersion liquid by the way that polystyrene is dispersed, emulsion polymerization, suspension polymerisation obtain, gather
The mass fraction of styrene nanoparticulate dispersion is 5%~15%.
5. a kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt according to claim 1, which is characterized in that
The partial size of polystyrene nanoparticles is 200~500nm in polystyrene nanoparticles dispersion liquid in the step 1.
6. a kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt according to claim 1, which is characterized in that
Using ultrasound when nano SiO 2 particle dispersion liquid, polystyrene nanoparticles dispersion liquid, water are uniformly mixed in the step 1
Dispersion technology mixing, the purpose using ultrasonic disperse are that nano SiO 2 particle and polystyrene nanoparticles is allowed to mix
It is even.
7. a kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt according to claim 1, which is characterized in that
Electrophoretic process is carried out in the step 2 in such a way that metal fiber felt is as anode, control electrophoretic voltage is 60~100V, electricity
The swimming time is 5~10min, and electrophoresis temperature is 23~27 DEG C.
8. a kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt according to claim 1, which is characterized in that
The drying temperature of first time is 200~250 DEG C in the step 3, keeps the temperature 20~40 minutes.
9. a kind of preparation method of high-temperature-resistant and anti-corrosion coating metal fibrofelt according to claim 1, which is characterized in that
450 DEG C~650 DEG C of secondary drying temperature in the step 3 keep the temperature 1~4 hour.
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| CN116178007B (en) * | 2022-12-21 | 2024-02-02 | 中国建筑材料科学研究总院有限公司 | High-temperature-resistant composite heat-gathering ring and its preparation method and application |
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| CN1580099A (en) * | 2003-08-11 | 2005-02-16 | 上海杰事杰新材料股份有限公司 | Continuous fiber reinforced thermoplastic composite material |
| CN104549960A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | High-temperature-resistant heat-insulation coating production method |
| CN106480581A (en) * | 2016-09-21 | 2017-03-08 | 东莞市联洲知识产权运营管理有限公司 | A kind of high intensity light and thin fabric of waterproof UV resistance and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1580099A (en) * | 2003-08-11 | 2005-02-16 | 上海杰事杰新材料股份有限公司 | Continuous fiber reinforced thermoplastic composite material |
| CN104549960A (en) * | 2013-10-22 | 2015-04-29 | 中国石油化工股份有限公司 | High-temperature-resistant heat-insulation coating production method |
| CN106480581A (en) * | 2016-09-21 | 2017-03-08 | 东莞市联洲知识产权运营管理有限公司 | A kind of high intensity light and thin fabric of waterproof UV resistance and preparation method thereof |
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