CN115678358A - Washing machine impeller, preparation method of washing machine impeller and washing machine - Google Patents
Washing machine impeller, preparation method of washing machine impeller and washing machine Download PDFInfo
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- CN115678358A CN115678358A CN202110850925.5A CN202110850925A CN115678358A CN 115678358 A CN115678358 A CN 115678358A CN 202110850925 A CN202110850925 A CN 202110850925A CN 115678358 A CN115678358 A CN 115678358A
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- washing machine
- impeller
- polyvinylidene fluoride
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- pulsator
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- 238000005406 washing Methods 0.000 title claims abstract description 110
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 58
- 238000000576 coating method Methods 0.000 claims abstract description 58
- 230000003075 superhydrophobic effect Effects 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000004140 cleaning Methods 0.000 claims abstract description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical group CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 50
- 239000002033 PVDF binder Substances 0.000 claims description 46
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 46
- 239000000243 solution Substances 0.000 claims description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 claims description 23
- 238000003756 stirring Methods 0.000 claims description 20
- 239000008139 complexing agent Substances 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 16
- 239000003054 catalyst Substances 0.000 claims description 15
- XPBBUZJBQWWFFJ-UHFFFAOYSA-N fluorosilane Chemical group [SiH3]F XPBBUZJBQWWFFJ-UHFFFAOYSA-N 0.000 claims description 15
- 239000003960 organic solvent Substances 0.000 claims description 12
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 11
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical group [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 10
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 10
- 239000012752 auxiliary agent Substances 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
- 238000009766 low-temperature sintering Methods 0.000 claims description 9
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 239000010703 silicon Substances 0.000 claims description 9
- BPCXHCSZMTWUBW-UHFFFAOYSA-N triethoxy(1,1,2,2,3,3,4,4,5,5,8,8,8-tridecafluorooctyl)silane Chemical compound CCO[Si](OCC)(OCC)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)CCC(F)(F)F BPCXHCSZMTWUBW-UHFFFAOYSA-N 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 8
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 6
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 claims description 6
- 238000009832 plasma treatment Methods 0.000 claims description 6
- 238000001723 curing Methods 0.000 claims description 5
- 238000005488 sandblasting Methods 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- PMQIWLWDLURJOE-UHFFFAOYSA-N triethoxy(1,1,2,2,3,3,4,4,5,5,6,6,7,7,10,10,10-heptadecafluorodecyl)silane Chemical compound CCO[Si](OCC)(OCC)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)CCC(F)(F)F PMQIWLWDLURJOE-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 28
- BSYQEPMUPCBSBK-UHFFFAOYSA-N [F].[SiH4] Chemical compound [F].[SiH4] BSYQEPMUPCBSBK-UHFFFAOYSA-N 0.000 abstract description 4
- 239000012459 cleaning agent Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 9
- 230000003068 static effect Effects 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 238000003848 UV Light-Curing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical group N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 125000001165 hydrophobic group Chemical group 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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Abstract
The invention provides a washing machine impeller, a preparation method of the washing machine impeller and a washing machine. The impeller of the washing machine provided by the invention utilizes the super-hydrophobic characteristic, so that water stains, dirt, thread scraps and other dirt are difficult to attach to the surface of the impeller of the washing machine; the super-hydrophobic material coating provided by the invention contains-CF 3 The fluorine silane component of the group ensures that the surface tension of the coating is very low, the contact angle is more than 160 degrees, the coating has super-hydrophobic property, dirt is not easy to attach to the surface of the coating, and even if the dirt is attached to the surface, the dirt can be utilizedThe fluidity of the water flow washes away dirt, and the water-based self-cleaning water-based cleaning agent has good self-cleaning property.
Description
Technical Field
The invention belongs to the technical field of household electrical appliances, and particularly relates to a washing machine impeller, a preparation method of the washing machine impeller and a washing machine.
Background
The washing machine is a necessary household appliance which can not be opened in daily life, and brings convenience and trouble to people: the washing machine is provided with the washing machine impeller at the bottom of the interior bucket, and the outside cover of interior bucket is equipped with outer bucket, has certain space intermediate layer between washing machine impeller and outer bucket, and washing machine rivers can flow between the intermediate layer when using, after using up, foul such as some water stains, dirt, thread cuttings very easily adhere on the surface of impeller, and the time will form intractable dirt for a long time, and contains a large amount of bacterium and mould in the dirt, brings secondary pollution for the clothing easily when reuse.
The present invention has been made in view of this situation.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art, and the invention provides a washing machine impeller with a self-cleaning function.
The invention also provides a preparation method of the washing machine impeller with the self-cleaning function.
The invention further provides a washing machine with the washing machine impeller.
In order to solve the technical problems, the invention adopts the technical scheme that:
a pulsator for a washing machine, comprising,
the super-hydrophobic material coating is arranged on the surface of the washing machine impeller;
the super-hydrophobic material coating is formed by coating silica-polyvinylidene fluoride mixed sol.
In the scheme, the washing machine impeller provided by the invention forms the super-hydrophobic material coating by coating the silicon dioxide-polyvinylidene fluoride mixed sol, has the super-hydrophobic characteristic, and ensures that water stains, dirt, thread scraps and other dirt are difficult to attach to the surface of the washing machine impeller, so as to achieve the self-cleaning effect.
Further, the silicon dioxide-polyvinylidene fluoride mixed sol is prepared from the following components:
methyl trimethoxy silane, a low surface energy additive, an organic solvent, a complexing agent, a catalyst and polyvinylidene fluoride solution.
In the scheme, the polyvinylidene fluoride has excellent chemical stability, corrosion resistance, high sealing property, high lubrication non-stick property and aging resistance, so that the prepared coating has the characteristics of corrosion resistance, environmental friendliness and no harm to human bodies.
Further, the volume ratio of the methyltrimethoxysilane to the low surface energy assistant is 1: (3-6);
preferably, the low surface energy auxiliary agent is a fluorosilane solution, and the volume ratio of the methyltrimethoxysilane to the fluorosilane solution is 1;
more preferably, the fluorosilane solution is at least one of tridecafluorooctyltriethoxysilane and heptadecafluorodecyltriethoxysilane.
In the scheme, the super-hydrophobic material coating provided by the invention contains-CF 3 The fluorine silane component of the group ensures that the surface tension of the coating is very low, the contact angle is more than 160 degrees, the coating has super-hydrophobic property, dirt is not easy to attach to the surface of the coating, even if the dirt is attached to the surface, the dirt can be washed away by utilizing the fluidity of water flow, and the coating has good self-cleaning property.
Further, the volume ratio of the methyltrimethoxysilane to the organic solvent is 1 (2-4);
preferably, the organic solvent is ethanol, and the volume ratio of the methyltrimethoxysilane to the ethanol is 1.
Further, the volume ratio of the low-surface-energy auxiliary agent to the polyvinylidene fluoride solution, the complexing agent and the catalyst is 1: (1-1.5): (0.01:0.1): (0.01-0.04);
preferably, the volume ratio of the low surface energy auxiliary agent to the polyvinylidene fluoride solution, the complexing agent and the catalyst is 1.5;
more preferably, the mass fraction of the polyvinylidene fluoride solution is 50-70%.
Further, the complexing agent is at least one of ethanol, isopropanol, n-butanol and isobutanol, and the catalyst is ammonia water;
preferably, the complexing agent is ethanol, and the concentration of the ethanol is 0.05mol/L; the concentration of the ammonia water is 10mol/L.
A preparation method of any one of the washing machine impellers comprises the following steps:
s1: adding a proper amount of methyltrimethoxysilane, an organic solvent and a low-surface-energy assistant into a container, uniformly stirring, continuously adding a complexing agent into the container, and uniformly stirring to obtain a mixed solution;
s2: slowly adding a catalyst into the mixed solution under the condition of stirring, and continuously stirring to obtain silica particle sol;
s3: adding a polyvinylidene fluoride solution into the silica particle sol, uniformly stirring and standing for 24 hours at the temperature of 60-75 ℃ to obtain a silica-polyvinylidene fluoride mixed sol;
s4: coating the silicon dioxide-polyvinylidene fluoride mixed sol on the surface of the impeller of the washing machine;
s5: and drying and curing the surface of the impeller of the washing machine.
Further, the step S4 further includes,
and carrying out sand blasting treatment on the surface of the washing machine impeller, cleaning and drying, then carrying out plasma treatment on the surface of the washing machine impeller, and coating the silica-polyvinylidene fluoride mixed sol.
Preferably, the washing machine impeller after the sand blasting treatment is cleaned by acetone and dried at 40 ℃.
Preferably, the plasma treatment comprises heating the washing machine impeller to a molten or semi-molten state using a dc-driven plasma arc as a heat source.
Further, the step S5 includes,
pre-drying treatment and low-temperature sintering treatment, wherein the temperature of the pre-drying treatment is 40-80 ℃, and the time is 10-15min; the low-temperature sintering treatment is carried out at the temperature of 80-180 ℃ for 15-25min.
Preferably, when the impeller of the washing machine contains impeller fibers, the low-temperature sintering temperature is 140-180 ℃; when the impeller of the washing machine does not contain impeller fibers, the low-temperature sintering temperature is 80-120 ℃.
The contact angle test of the surface of the washing machine impeller with the super-hydrophobic characteristic, which is prepared by the invention, shows that the static contact angle of water drops on the surface of the washing machine impeller is 160-175 degrees, the water drops can not wet the surface of the washing machine impeller and have natural hydrophobicity, so that dirt is not easy to attach to the surface of a coating, and even if the dirt is attached to the surface, the dirt can be washed away by utilizing the fluidity of water flow, and the washing machine impeller with the super-hydrophobic characteristic has good self-cleaning characteristic.
A washing machine comprises the washing machine impeller.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
the washing machine impeller provided by the invention is coated with the silicon dioxide-polyvinylidene fluoride mixed sol to form the super-hydrophobic material coating, has a super-hydrophobic characteristic, and ensures that water stains, dirt, thread scraps and other dirt are difficult to attach to the surface of the washing machine impeller, so as to achieve a self-cleaning effect.
The super-hydrophobic material coating provided by the invention contains-CF 3 The fluorine silane component of the group ensures that the surface tension of the coating is very low, the contact angle is more than 160 degrees, the coating has super-hydrophobic property, dirt is not easy to attach to the surface of the coating, even if the dirt is attached to the surface, the dirt can be washed away by utilizing the fluidity of water flow, and the coating has good self-cleaning property.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic view of the pulsator for washing machines according to the present invention.
FIG. 2 is a flow chart of a preparation method of the super-hydrophobic material coating.
In the figure: 10. a pulsator of a washing machine; 11. and (3) coating the super-hydrophobic material.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
As shown in fig. 1, the present invention provides a pulsator for washing machines, comprising,
a super-hydrophobic material coating layer 11 arranged on the surface of the washing machine impeller 10;
the super-hydrophobic material coating 11 is formed by coating a silica-polyvinylidene fluoride mixed sol.
In the scheme, the washing machine impeller provided by the invention forms the super-hydrophobic material coating by coating the silicon dioxide-polyvinylidene fluoride mixed sol, has a super-hydrophobic characteristic, and enables water stains, dirt, thread scraps and other dirt to be difficult to attach to the surface of the washing machine impeller so as to achieve a self-cleaning effect.
Further, the thickness of the super-hydrophobic material coating 11 is 10-100 μm; preferably, the thickness of the superhydrophobic material coating 11 is 30-50 μm.
In some embodiments, the silica-polyvinylidene fluoride hybrid sol is prepared using the following components:
methyl trimethoxy silane, a low surface energy additive, an organic solvent, a complexing agent, a catalyst and polyvinylidene fluoride solution.
In the scheme, the polyvinylidene fluoride has excellent chemical stability, corrosion resistance, high sealing property, lubrication non-stick property and aging resistance, so that the prepared coating has the characteristics of corrosion resistance, environmental friendliness and no harm to a human body.
In some embodiments, the volume ratio of methyltrimethoxysilane to the low surface energy adjuvant is 1: (3-6);
preferably, the low surface energy additive is a fluorosilane solution, and the volume ratio of the methyltrimethoxysilane to the fluorosilane solution is 1;
more preferably, the fluorosilane solution is at least one of tridecafluorooctyltriethoxysilane and heptadecafluorodecyltriethoxysilane.
In the scheme, the super-hydrophobic material coating provided by the invention contains-CF 3 The fluorosilane component of the group ensures that the surface tension of the coating is very low, the contact angle is more than 160 degrees, the surface free energy of fluorosilane is low, the fluorosilane has viscosity resistance to polar and nonpolar substances, and hydrolysis reaction can be carried out in a humid environment to form a silicon dioxide base film and a self-repairing corrosion-resistant polymer, so the fluorosilane component has natural hydrophobicity, dirt is not easy to attach to the surface of the coating, and even if the fluorosilane component is attached to the surface, the dirt can be washed off by utilizing the fluidity of water flow, and the fluorosilane component has good self-cleaning property.
In some embodiments, the volume ratio of methyltrimethoxysilane to the organic solvent is 1 (2-4);
preferably, the organic solvent is ethanol, and the volume ratio of the methyltrimethoxysilane to the ethanol is 1.
In some embodiments, the volume ratio of the low surface energy aid to the polyvinylidene fluoride solution, complexing agent, catalyst is 1: (1-1.5): (0.01:0.1): (0.01-0.04);
preferably, the volume ratio of the low surface energy auxiliary agent to the polyvinylidene fluoride solution, the complexing agent and the catalyst is 1.5;
more preferably, the mass fraction of the polyvinylidene fluoride solution is 50-70%.
In some embodiments, the complexing agent is at least one of ethanol, isopropanol, n-butanol, isobutanol, and the catalyst is ammonia;
preferably, the complexing agent is ethanol, and the concentration of the ethanol is 0.05mol/L; the concentration of the ammonia water is 10mol/L.
The stability of the silica particle sol can be improved by adding the complexing agent, and the service life of the coating is prolonged.
By adjusting the volume ratio of the components, the super-hydrophobic material coating with a large number of hydrophobic groups is prepared, and the surface energy of the whole system can be reduced by adding the low-surface-energy auxiliary agent, so that the hydrophobic property of the material is improved, and the formation of the super-hydrophobic material is promoted.
As shown in fig. 2, the invention provides a method for preparing the impeller of any one of the above washing machines, which comprises the following steps:
s1: adding a proper amount of methyltrimethoxysilane, an organic solvent and a low-surface-energy assistant into a container, uniformly stirring, continuously adding a complexing agent into the container, and uniformly stirring to obtain a mixed solution;
s2: slowly adding a catalyst into the mixed solution under the condition of stirring, and continuously stirring to obtain silica particle sol;
s3: adding a polyvinylidene fluoride solution into the silica particle sol, uniformly stirring and standing for 24 hours at the temperature of 60-75 ℃ to obtain a silica-polyvinylidene fluoride mixed sol;
s4: coating the silicon dioxide-polyvinylidene fluoride mixed sol on the surface of the impeller of the washing machine;
s5: and drying and curing the surface of the impeller of the washing machine.
The silica particle sol and the polyvinylidene fluoride solution can play a synergistic effect on the hydrophobic property, and the hydrophobicity of the material can be greatly improved.
Further, the step S4 further includes performing sand blasting on the surface of the washing machine impeller, cleaning and drying, performing plasma treatment on the surface of the washing machine impeller, and coating the silica-polyvinylidene fluoride mixed sol.
Preferably, the plasma treatment comprises heating the washing machine impeller to a molten or semi-molten state using a dc-driven plasma arc as a heat source.
The plasma gas is Ar gas, and the power of the electric arc is 31-35kw. The plasma flame flow heat source has high temperature, then the spray gun is used for spraying the silicon dioxide-polyvinylidene fluoride mixed sol to the surface of the impeller of the washing machine at high speed to form a firmly-adhered super-hydrophobic material coating, so that the coating and the surface of the impeller can be compactly combined, and then the wear-resistant hydrophobic coating is formed through drying and curing treatment.
Further, the step S5 comprises pre-drying treatment and low-temperature sintering treatment, wherein the pre-drying treatment is carried out at the temperature of 40-80 ℃ for 10-15min; the low-temperature sintering treatment is carried out at the temperature of 80-180 ℃ for 15-25min.
By sintering the sprayed impeller of the washing machine at low temperature, the residual stress after the conversion of the coating and the matrix structure after plasma spraying can be reduced.
Of course, the UV curing lamp can also be used for carrying out UV curing on the impeller of the washing machine, and the UV radiation degree of the UV curing lamp is 30-40mw/cm 2 The irradiation time is 6-20s.
Example 1
The embodiment provides a preparation method of a pulsator of a washing machine, which comprises the following steps:
s1: adding methyltrimethoxysilane, an ethanol solvent and tridecafluorooctyltriethoxysilane into a container, uniformly stirring, continuously adding 0.05mol/L ethanol solution into the container, and stirring for 2 hours to obtain a mixed solution;
s2: slowly adding 10mol/L ammonia water solution into the mixed solution under the condition of stirring, and continuously stirring for 1h to obtain silica particle sol;
s3: adding polyvinylidene fluoride solution with the mass fraction of 50% into the silica particle sol, stirring for 2 hours, and standing for 24 hours at 60 ℃ to obtain silica-polyvinylidene fluoride mixed sol;
the volume ratio of the methyltrimethoxysilane, the tridecafluorooctyltriethoxysilane, the ethanol solvent, the polyvinylidene fluoride solution, the ethanol solution and the ammonia water is (1).
S4: carrying out sand blasting treatment on the surface of the washing machine impeller, cleaning the surface by using acetone, drying the surface, carrying out plasma treatment on the surface of the washing machine impeller, wherein the plasma gas is Ar gas, the power of electric arc is 31kw, and spraying the silicon dioxide-polyvinylidene fluoride mixed sol on the surface of the washing machine impeller by using a spray gun;
s5: drying and curing the surface of the impeller of the washing machine, wherein the temperature of the pre-drying treatment is 60 ℃ and the time is 15min; the temperature of the low-temperature sintering treatment is 160 ℃, and the time is 25min.
The contact angle test of the surface of the washing machine impeller with the super-hydrophobic characteristic, which is prepared by the embodiment, shows that the static contact angle of water drops on the surface of the washing machine impeller is 175 degrees, the water drops cannot soak the surface of the washing machine impeller and have natural hydrophobicity, so that dirt is not easy to attach to the surface of a coating, and even if the dirt is attached to the surface, the dirt can be washed away by utilizing the flowability of water flow, and the washing machine impeller with the super-hydrophobic characteristic has a good self-cleaning characteristic.
Example 2
The difference between the preparation method of the pulsator for washing machines provided by the embodiment and the embodiment 1 is that: during the preparation process, the volume ratio of methyltrimethoxysilane, tridecafluorooctyltriethoxysilane, ethanol solvent, polyvinylidene fluoride solution, ethanol solution and ammonia water is 1.
The contact angle test of the surface of the washing machine impeller with the super-hydrophobic characteristic, which is prepared by the embodiment, shows that the static contact angle of water drops on the surface of the washing machine impeller is 166 degrees, the water drops can not soak the surface of the washing machine impeller and have natural hydrophobicity, so that dirt is not easy to attach to the surface of a coating, and even if the dirt is attached to the surface, the dirt can be washed away by utilizing the flowability of water flow, and the washing machine impeller with the super-hydrophobic characteristic has a good self-cleaning characteristic.
Example 3
The difference between the preparation method of the pulsator for washing machines provided by the embodiment and the embodiment 1 is that: during the preparation process, the volume ratio of methyltrimethoxysilane, tridecafluorooctyltriethoxysilane, ethanol solvent, polyvinylidene fluoride solution, ethanol solution and ammonia water is (1).
The contact angle test of the surface of the washing machine impeller with the super-hydrophobic characteristic, which is prepared by the embodiment, shows that the static contact angle of water drops on the surface of the washing machine impeller is 170 degrees, the water drops cannot soak the surface of the washing machine impeller and have natural hydrophobicity, so that dirt is not easy to attach to the surface of a coating, and even if the dirt is attached to the surface, the dirt can be washed away by utilizing the fluidity of water flow, and the washing machine impeller with the super-hydrophobic characteristic has a good self-cleaning characteristic.
Example 4
The difference between the preparation method of the pulsator for washing machines provided by the embodiment and the embodiment 1 is that: during the preparation process, the volume ratio of methyltrimethoxysilane, tridecafluorooctyltriethoxysilane, ethanol solvent, polyvinylidene fluoride solution, ethanol solution and ammonia water is 1.
The contact angle test of the surface of the washing machine impeller with the super-hydrophobic characteristic, which is prepared by the embodiment, shows that the static contact angle of water drops on the surface of the washing machine impeller is 160 degrees, the water drops can not soak the surface of the washing machine impeller and have natural hydrophobicity, so that dirt is not easy to attach to the surface of a coating, and even if the dirt is attached to the surface, the dirt can be washed away by utilizing the fluidity of water flow, and the washing machine impeller with the super-hydrophobic characteristic has a good self-cleaning characteristic.
Comparative example 1
The preparation method of the washing machine impeller provided by the comparative example is different from the preparation method of the washing machine impeller in example 1 in that: during the preparation, the tridecafluorooctyltriethoxysilane is not added.
The contact angle test of the surface of the washing machine impeller with the super-hydrophobic characteristic prepared by the comparative example shows that the static contact angle of water drops on the surface of the washing machine impeller is 150.5 degrees.
Comparative example 2
The preparation method of the washing machine impeller provided by the comparative example is different from the preparation method of the washing machine impeller in example 1 in that: in the preparation process, polyvinylidene fluoride solution is not added, and the silica particle sol is directly sprayed on the surface of the impeller of the washing machine.
The contact angle test of the surface of the washing machine impeller with the super-hydrophobic characteristic prepared by the comparative example shows that the static contact angle of water drops on the surface of the washing machine impeller is 148 degrees.
It should be noted that the pulsator for washing machines used in the above examples and comparative examples contains glass fibers.
By way of comparative example 1 andthe test results of comparative example 2 show that the coating prepared from the silica-polyvinylidene fluoride hybrid sol has higher hydrophobicity, but the hydrophobic property is still slightly inferior to the test results of examples 1-4. That is because the super-hydrophobic material coating provided by the invention is added with the coating containing-CF 3 The fluorine silane component of the group ensures that the surface tension of the coating is very low, and the super-hydrophobic material coating with a large number of hydrophobic groups can be prepared.
The invention also provides a washing machine comprising the impeller of any one of the washing machines.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.
Claims (10)
1. A pulsator for washing machines, which is characterized by comprising,
the super-hydrophobic material coating is arranged on the surface of the washing machine impeller;
the super-hydrophobic material coating is formed by coating silica-polyvinylidene fluoride mixed sol.
2. The pulsator of claim 1, wherein the silica-polyvinylidene fluoride hybrid sol is prepared by using the following components:
methyl trimethoxy silane, a low surface energy additive, an organic solvent, a complexing agent, a catalyst and polyvinylidene fluoride solution.
3. The pulsator for washing machines, as claimed in claim 2, wherein:
the volume ratio of the methyltrimethoxysilane to the low-surface-energy auxiliary agent is 1: (3-6);
preferably, the low surface energy auxiliary agent is a fluorosilane solution, and the volume ratio of the methyltrimethoxysilane to the fluorosilane solution is 1;
more preferably, the fluorosilane solution is at least one of tridecafluorooctyltriethoxysilane and heptadecafluorodecyltriethoxysilane.
4. The pulsator for washing machines, as claimed in claim 2, wherein:
the volume ratio of the methyltrimethoxysilane to the organic solvent is 1 (2-4);
preferably, the organic solvent is ethanol, and the volume ratio of the methyltrimethoxysilane to the ethanol is 1.
5. The pulsator for washing machines, as claimed in claim 3, wherein:
the volume ratio of the low surface energy auxiliary agent to the polyvinylidene fluoride solution, the complexing agent and the catalyst is 1: (1-1.5): (0.01:0.1): (0.01-0.04);
preferably, the volume ratio of the low surface energy auxiliary agent to the polyvinylidene fluoride solution, the complexing agent and the catalyst is 1.5;
more preferably, the mass fraction of the polyvinylidene fluoride solution is 50-70%.
6. The pulsator for washing machines, as claimed in claim 5, wherein:
the complexing agent is at least one of ethanol, isopropanol, n-butanol and isobutanol, and the catalyst is ammonia water;
preferably, the complexing agent is ethanol, and the concentration of the ethanol is 0.05mol/L; the concentration of the ammonia water is 10mol/L.
7. A method for preparing a pulsator for washing machines as claimed in any one of claims 1 to 6, comprising the steps of:
s1: adding a proper amount of methyltrimethoxysilane, an organic solvent and a low-surface-energy auxiliary agent into a container, uniformly stirring, continuously adding a complexing agent into the container, and uniformly stirring to obtain a mixed solution;
s2: slowly adding a catalyst into the mixed solution under the condition of stirring, and continuously stirring to obtain silica particle sol;
s3: adding a polyvinylidene fluoride solution into the silica particle sol, uniformly stirring and standing for 24 hours at the temperature of 60-75 ℃ to obtain a silica-polyvinylidene fluoride mixed sol;
s4: coating the silicon dioxide-polyvinylidene fluoride mixed sol on the surface of the impeller of the washing machine;
s5: and drying and curing the surface of the impeller of the washing machine.
8. The method for manufacturing a pulsator of washing machines as claimed in claim 7, wherein: said step S4 further comprises the step of,
and carrying out sand blasting treatment on the surface of the washing machine impeller, cleaning and drying, then carrying out plasma treatment on the surface of the washing machine impeller, and coating the silica-polyvinylidene fluoride mixed sol.
9. The preparation method of the pulsator of the washing machine according to claim 7, wherein: said step S5 comprises the steps of,
pre-drying treatment and low-temperature sintering treatment, wherein the temperature of the pre-drying treatment is 40-80 ℃, and the time is 10-15min; the low-temperature sintering treatment is carried out at the temperature of 80-180 ℃ for 15-25min.
10. A washing machine characterized in that: comprising a washing machine pulsator according to any one of claims 1 to 6.
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Country or region after: China Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: Qingdao Haier Cleaning and Protection Electrical Appliance Co.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO JIAONAN HAIER WASHING MACHINE Co.,Ltd. Country or region before: China Applicant before: Haier Smart Home Co., Ltd. |
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