CN115895009A - Wear-resistant and super-hydrophobic polycarbonate substrate and preparation method thereof - Google Patents
Wear-resistant and super-hydrophobic polycarbonate substrate and preparation method thereof Download PDFInfo
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- CN115895009A CN115895009A CN202211621604.9A CN202211621604A CN115895009A CN 115895009 A CN115895009 A CN 115895009A CN 202211621604 A CN202211621604 A CN 202211621604A CN 115895009 A CN115895009 A CN 115895009A
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- 239000004417 polycarbonate Substances 0.000 title claims abstract description 57
- 229920000515 polycarbonate Polymers 0.000 title claims abstract description 57
- 239000000758 substrate Substances 0.000 title claims abstract description 49
- 230000003075 superhydrophobic effect Effects 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 114
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 102
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 73
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 59
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 59
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 57
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 57
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000151 deposition Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 8
- 239000007921 spray Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 239000008367 deionised water Substances 0.000 claims description 11
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- 238000001035 drying Methods 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000009210 therapy by ultrasound Methods 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 238000005299 abrasion Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000009718 spray deposition Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000001291 vacuum drying Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 abstract description 12
- 238000012986 modification Methods 0.000 abstract description 12
- 239000004033 plastic Substances 0.000 abstract description 2
- 229920003023 plastic Polymers 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 description 7
- 238000010998 test method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000005661 hydrophobic surface Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 125000003709 fluoroalkyl group Chemical group 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000005476 size effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention relates to the technical field of plastic modification, and provides a wear-resistant super-hydrophobic polycarbonate substrate and a preparation method thereof. The polycarbonate substrate is prepared by grafting and modifying polytetrafluoroethylene micro powder by glycidyl methacrylate, carrying out surface modification on nano molybdenum disulfide powder by perfluoroalkyl mercaptan, dispersing the modified polytetrafluoroethylene micro powder and the modified nano molybdenum disulfide powder in methanol, and spraying and depositing on the surface of the polycarbonate substrate. The method of the invention not only can obviously improve the friction performance of the surface of the polycarbonate substrate and obviously reduce the friction and wear, but also can endow the surface of the substrate with super-hydrophobicity.
Description
Technical Field
The invention relates to the technical field of plastic modification, and provides a wear-resistant super-hydrophobic polycarbonate substrate and a preparation method thereof.
Background
Polycarbonate is a general engineering plastic with excellent comprehensive performance, not only has good mechanical properties such as tensile strength, impact resistance, creep resistance and the like, but also has good electrical insulation, dimensional stability, chemical resistance and ductility, and in addition, the polycarbonate has high heat resistance and cold resistance, and is nontoxic, odorless, easy to color and self-flame retardant. Polycarbonate is used in engineering plastics in amounts second to polyamides, and is now widely used in the fields of electronics, automobile manufacturing, building materials, mechanical connections, optical devices, and the like.
Because the hydrophobicity of the polycarbonate is poor, the surface of the product is easily polluted by dust, fingerprints and the like, the surface is endowed with super-hydrophobicity, and the service performance of the product can be greatly improved. The construction of superhydrophobic surfaces has two approaches: the low surface energy substance is modified on the rough surface or the rough structure is constructed on the surface of the hydrophobic material, and the super-hydrophobic surface needs two conditions, namely the rough structure and the low surface energy. In general, a combination of micro-scale and nano-scale asperities creates a more hydrophobic surface. In addition, the polycarbonate has low wear resistance and obvious frictional wear, which limits the application range of the polycarbonate material to a certain extent.
Disclosure of Invention
In view of the above, the present invention provides an abrasion-resistant superhydrophobic polycarbonate substrate and a method for preparing the same, which overcome the above-mentioned drawbacks.
The invention relates to the following specific technical scheme:
a preparation method of an abrasion-resistant and super-hydrophobic polycarbonate substrate comprises the following steps:
(1) Dissolving glycidyl methacrylate in methanol, adding polytetrafluoroethylene micro powder, stirring and dispersing, introducing nitrogen to remove oxygen, sealing, performing irradiation reaction by adopting cobalt 60-gamma rays, filtering after the reaction is finished, washing by using methanol, and drying in vacuum to obtain modified polytetrafluoroethylene micro powder;
(2) Dissolving perfluoroalkyl mercaptan in deionized water, adding nano molybdenum disulfide powder, stirring and dispersing, carrying out ultrasonic treatment for a certain time, filtering, washing with methanol, and carrying out vacuum drying to obtain modified nano molybdenum disulfide powder;
(3) Dispersing the modified polytetrafluoroethylene micro powder and the modified nano molybdenum disulfide powder in methanol, spraying and depositing on the surface of the polycarbonate substrate, and drying in vacuum to obtain the wear-resistant super-hydrophobic polycarbonate substrate.
According to the invention, polytetrafluoroethylene micro powder and nano molybdenum disulfide powder with hydrophobicity are adopted, and dispersion liquid of the polytetrafluoroethylene micro powder and the nano molybdenum disulfide powder is deposited on the surface of a polycarbonate substrate through spraying to form a micro-nano coarse structure, namely a hydrophobic surface with a coarse structure is formed. And the polytetrafluoroethylene has good wear resistance, the nano molybdenum disulfide can also play a role in resisting and reducing wear due to the layered structure of the nano molybdenum disulfide, and the nano molybdenum disulfide are deposited together, so that the friction performance of the surface of the polycarbonate substrate can be improved, and the friction and wear can be reduced.
However, because the interface bonding between the polycarbonate and the polytetrafluoroethylene is poor, the polytetrafluoroethylene micro powder is not easy to disperse uniformly when deposited on the surface of the polycarbonate substrate, and is easy to separate under the action of external force after deposition, and the nano molybdenum disulfide powder is not well bonded with the interface between the polycarbonate and the polytetrafluoroethylene, and is easy to agglomerate due to the nano size effect. Due to the reasons, the polytetrafluoroethylene micro powder and the nano molybdenum disulfide powder are deposited on the surface of the polycarbonate substrate, so that the defects of easy agglomeration and infirm are caused, and the effects of reducing friction and abrasion of the polytetrafluoroethylene micro powder and the nano molybdenum disulfide powder are not facilitated. In view of the above, the present invention respectively performs surface modification on the polytetrafluoroethylene fine powder and the nano molybdenum disulfide powder before performing spray deposition. In order to obtain a polycarbonate substrate having both good abrasion resistance and superhydrophobicity, the surface modification of the powder is not only to solve the above problems, but also to not cause a decrease in surface hydrophobicity. In order to achieve the effect, the invention adopts glycidyl methacrylate to carry out irradiation grafting modification on polytetrafluoroethylene micro powder, adopts perfluoroalkyl mercaptan to carry out surface modification on nano molybdenum disulfide powder, and has the following functions:
firstly, through the modification, the polytetrafluoroethylene micro powder can form good interface combination with polycarbonate through the introduced ester group and epoxy group, and the nano molybdenum disulfide powder can form good interface combination with the polytetrafluoroethylene micro powder through the introduced fluoroalkyl group, so that the uniform deposition of the modified polytetrafluoroethylene micro powder and the modified nano molybdenum disulfide powder on the surface of a polycarbonate substrate is promoted, the deposition dispersibility is improved, the interface combination strength is improved, a uniform and firm deposition layer is formed, and the good wear-resistant and friction-reducing performances of the polytetrafluoroethylene micro powder and the nano molybdenum disulfide powder are favorably exerted.
The above modification method then ensures good hydrophobicity of the polycarbonate substrate surface, i.e. a good coarse structural basis and low surface energy. On one hand, as mentioned above, the modified nano molybdenum disulfide powder and the modified polytetrafluoroethylene micro powder are well combined at the interface, and the modified polytetrafluoroethylene micro powder and the polycarbonate interface are well combined, so that a deposition layer with micron-sized powder adhered to the surface of the substrate and nano-sized powder adhered to the surface of the micron-sized powder can be formed, and thus, the modified powder can construct a good multi-level micro-nano coarse structure foundation; on the other hand, the perfluoroalkyl mercaptan can obviously reduce the surface energy of the nano molybdenum disulfide powder, the glycidyl methacrylate has little influence on the low surface energy of the polytetrafluoroethylene micro powder, but the influence is not great, and the low surface energy of a deposited layer can be ensured by controlling the dosage of the perfluoroalkyl mercaptan and the glycidyl methacrylate (more perfluoroalkyl mercaptan and less glycidyl methacrylate).
As can be seen, the amount of modifier used in the powder modification process is important to control. In the modification process of the polytetrafluoroethylene micropowder, the dosage of the glycidyl methacrylate is not too much, which is because: interface combination with polycarbonate can be realized by less glycidyl methacrylate, and the influence on the surface energy can be increased by more glycidyl methacrylate, so that hydrophobicity is not favorable, and the adhesion of modified nano molybdenum disulfide powder on the surface of the modified polytetrafluoroethylene micro powder is not favorable if glycidyl methacrylate is grafted too much. The technical scheme of the invention adopts the following steps that the mass ratio of polytetrafluoroethylene micro powder to glycidyl methacrylate to methanol is 10:1-2:100.
in the modification process of the nano molybdenum disulfide powder, the dosage of the perfluoroalkyl mercaptan is not suitable to be too small, because: less perfluoroalkyl mercaptan can not ensure the low surface energy of the deposited layer, and is not beneficial to the adhesion of the modified nano molybdenum disulfide powder on the surface of the modified polytetrafluoroethylene micro powder. The technical scheme of the invention adopts the following technical scheme that the mass ratio of nano molybdenum disulfide powder, perfluoroalkyl mercaptan and deionized water is 10:10-15:100.
in addition, during spray deposition, the proportion of the modified polytetrafluoroethylene micro powder and the modified nano molybdenum disulfide powder also needs to be controlled, so that a multi-level micro-nano rough structure is obtained. The technical scheme of the invention adopts the following steps that the mass ratio of modified polytetrafluoroethylene micro powder to modified nano molybdenum disulfide powder to methanol is 10-14:5-7:100. as a further preferable scheme, the mass ratio of the modified polytetrafluoroethylene micro powder, the modified nano molybdenum disulfide powder and the methanol is 10:5:100 or 12:6:100 or 14:7:100.
preferably, the particle size of the polytetrafluoroethylene fine powder is 20 to 30 μm.
Preferably, the particle size of the nano molybdenum disulfide powder is 100-200nm.
Preferably, the first and second liquid crystal materials are, the perfluoroalkyl mercaptan is 1H, 2H-perfluorooctanethiol, 1H, 2H-perfluorodecanethiol 1H, 2H-perfluorododecanethiol.
Preferably, in the step (1), the temperature of the irradiation reaction is room temperature, and the irradiation dose is 30-50kGy.
Preferably, in the step (2), the ultrasonic power of the ultrasonic treatment is 500-1000W, and the time is 18-24h.
Preferably, in the step (3), the spray amount of the spray deposit is 250 to 350g/m 2 The diameter of the spray hole is 0.7-1mm, the spray pressure is 2-4bar, and the distance is 10-15cm.
The invention also provides the wear-resistant and super-hydrophobic polycarbonate substrate prepared by the preparation method. The polycarbonate substrate is prepared by grafting and modifying polytetrafluoroethylene micro powder by glycidyl methacrylate, carrying out surface modification on nano molybdenum disulfide powder by perfluoroalkyl mercaptan, dispersing the modified polytetrafluoroethylene micro powder and the modified nano molybdenum disulfide powder in methanol, and spraying and depositing on the surface of the polycarbonate substrate.
In conclusion, the invention provides a wear-resistant and super-hydrophobic polycarbonate substrate and a preparation method thereof, and the wear-resistant and super-hydrophobic polycarbonate substrate has the following beneficial effects: by modifying the polytetrafluoroethylene micro powder and the nano molybdenum disulfide powder, the modified polytetrafluoroethylene micro powder and the modified nano molybdenum disulfide powder can be uniformly deposited on the surface of the polycarbonate substrate, the deposition dispersibility is improved, and the interface bonding strength is improved, so that a uniform and firm deposition layer is formed, the good wear-resistant and friction-reducing performances of the polytetrafluoroethylene micro powder and the nano molybdenum disulfide powder are favorably exerted, the friction performance of the surface of the polycarbonate substrate can be obviously improved, and the friction and wear are obviously reduced. Moreover, the modified polytetrafluoroethylene micro powder and the modified nano molybdenum disulfide powder can construct a multi-level micro-nano rough structure on the surface of the polycarbonate substrate, have low surface energy and can endow the surface of the substrate with super-hydrophobicity.
Detailed Description
The following examples further illustrate the technical aspects of the present invention, but should not be construed as limiting the scope of the present invention. Various substitutions and alterations based on the knowledge and conventional practices of the ordinary skill in the art are intended to be included within the scope of the present invention without departing from the spirit thereof.
In the following examples, the polytetrafluoroethylene fine powder used had a particle size of 20 μm and the nano molybdenum disulfide powder had a particle size of 100nm.
The related performance tests are carried out at room temperature, and the specific method comprises the following steps:
(1) A contact angle tester (the model is OCA 20) is adopted, 5 mu L of deionized water is used as a medium, and the water contact angle is tested;
(2) A high-speed high-temperature friction and wear testing machine (model MG-2000) is adopted, a GCr15 steel ball with the diameter of 6mm is adopted, a ball disc friction mode is adopted, the test load is 30N, the test time is 30min, the reciprocating distance is 5mm, and the wear rate is calculated according to the ratio of omega = wear volume/(load multiplied by total displacement).
The water contact angle of the polycarbonate substrate with the undeposited surface measured by the test method is 88.3 degrees, and the wear rate is 7.75 multiplied by 10 -5 mm 3 /N·m。
Example 1
(1) Dissolving glycidyl methacrylate in methanol, adding polytetrafluoroethylene micro powder, stirring and dispersing, introducing nitrogen to remove oxygen, sealing, performing radiation reaction by adopting cobalt 60-gamma rays, filtering after the reaction is finished, washing by using methanol, and drying in vacuum to obtain modified polytetrafluoroethylene micro powder;
(2) Dissolving 1H,2H and 2H-perfluorooctanethiol in deionized water, adding nano molybdenum disulfide powder, stirring and dispersing, carrying out ultrasonic treatment for a certain time, filtering, washing with methanol, and carrying out vacuum drying to obtain modified nano molybdenum disulfide powder;
(3) Dispersing the modified polytetrafluoroethylene micro powder and the modified nano molybdenum disulfide powder in methanol, spraying and depositing on the surface of the polycarbonate substrate, and drying in vacuum to obtain the wear-resistant and super-hydrophobic polycarbonate substrate;
in the step (1), the mass ratio of the polytetrafluoroethylene micro powder to the glycidyl methacrylate to the methanol is 10:1:100, respectively; the temperature of the irradiation reaction is room temperature, and the irradiation dose is 30kGy;
in the step (2), the mass ratio of the nano molybdenum disulfide powder, 1H, 2H-perfluorooctanethiol and deionized water is 10:15:100, respectively; the ultrasonic power of ultrasonic treatment is 800W, and the time is 20h;
in the step (3), the mass ratio of the modified polytetrafluoroethylene micro powder to the modified nano molybdenum disulfide powder to the methanol is 10:5:100, respectively; the spray deposition has a spray rate of 300g/m 2 The diameter of the spray hole is 0.75mm, the spray pressure is 3bar, and the distance is 15cm.
The polycarbonate substrate of example 1 had a water contact angle of 157.3 ° and a wear rate of 3.94 × 10 as measured by the test method described above -5 mm 3 /N·m。
Example 2
(1) Dissolving glycidyl methacrylate in methanol, adding polytetrafluoroethylene micro powder, stirring and dispersing, introducing nitrogen to remove oxygen, sealing, performing irradiation reaction by adopting cobalt 60-gamma rays, filtering after the reaction is finished, washing by using methanol, and drying in vacuum to obtain modified polytetrafluoroethylene micro powder;
(2) Dissolving 1H,2H and 2H-perfluorodecylthiol in deionized water, adding nano molybdenum disulfide powder, stirring and dispersing, performing ultrasonic treatment for a certain time, filtering, washing with methanol, and performing vacuum drying to obtain modified nano molybdenum disulfide powder;
(3) Dispersing the modified polytetrafluoroethylene micro powder and the modified nano molybdenum disulfide powder in methanol, spraying and depositing on the surface of a polycarbonate substrate, and drying in vacuum to obtain a wear-resistant super-hydrophobic polycarbonate substrate;
in the step (1), the mass ratio of the polytetrafluoroethylene micro powder to the glycidyl methacrylate to the methanol is 10:1.5:100, respectively; the temperature of the irradiation reaction is room temperature, and the irradiation dose is 40kGy;
in the step (2), the mass ratio of the nano molybdenum disulfide powder, 1H, 2H-perfluorodecylthiol and deionized water is 10:12:100, respectively; the ultrasonic power of ultrasonic treatment is 800W, and the time is 20h;
in the step (3), the mass ratio of the modified polytetrafluoroethylene micro powder to the modified nano molybdenum disulfide powder to the methanol is 12:6:100; the spray deposition has a spray volume of 300g/m 2 The diameter of the spray hole is 0.75mm, the spray pressure is 3bar, and the distance is 15cm.
The polycarbonate substrate of example 2 had a water contact angle of 155.4 ° and a wear rate of 3.86X 10 as measured by the test method described above -5 mm 3 /N·m。
Example 3
(1) Dissolving glycidyl methacrylate in methanol, adding polytetrafluoroethylene micro powder, stirring and dispersing, introducing nitrogen to remove oxygen, sealing, performing irradiation reaction by adopting cobalt 60-gamma rays, filtering after the reaction is finished, washing by using methanol, and drying in vacuum to obtain modified polytetrafluoroethylene micro powder;
(2) Dissolving 1H, 2H-perfluorododecyl mercaptan in deionized water, adding nano molybdenum disulfide powder, stirring and dispersing, carrying out ultrasonic treatment for a certain time, filtering, washing with methanol, and drying in vacuum to obtain modified nano molybdenum disulfide powder;
(3) Dispersing the modified polytetrafluoroethylene micro powder and the modified nano molybdenum disulfide powder in methanol, spraying and depositing on the surface of a polycarbonate substrate, and drying in vacuum to obtain a wear-resistant super-hydrophobic polycarbonate substrate;
in the step (1), the mass ratio of the polytetrafluoroethylene micro powder to the glycidyl methacrylate to the methanol is 10:2:100, respectively; the temperature of the irradiation reaction is room temperature, and the irradiation dose is 50kGy;
in the step (2), the mass ratio of the nano molybdenum disulfide powder, 1H, 2H-perfluorododecyl mercaptan and deionized water is 10:10:100; the ultrasonic power of ultrasonic treatment is 800W, and the time is 20h;
in the step (3), the modified polytetrafluoroethylene micropowderThe mass ratio of the modified nano molybdenum disulfide powder to the methanol is 14:7:100, respectively; the spray deposition has a spray volume of 300g/m 2 The diameter of the spray hole is 0.75mm, the spray pressure is 3bar, and the distance is 15cm.
The polycarbonate substrate of example 3 had a water contact angle of 153.5 ° and a wear rate of 3.81 × 10 as measured by the test method described above -5 mm 3 /N·m。
Claims (8)
1. A preparation method of an abrasion-resistant and super-hydrophobic polycarbonate substrate is characterized by comprising the following steps:
(1) Dissolving glycidyl methacrylate in methanol, adding polytetrafluoroethylene micro powder, stirring and dispersing, introducing nitrogen to remove oxygen, sealing, performing irradiation reaction by adopting cobalt 60-gamma rays, filtering after the reaction is finished, washing by using methanol, and drying in vacuum to obtain modified polytetrafluoroethylene micro powder; wherein the mass ratio of the polytetrafluoroethylene micro powder to the glycidyl methacrylate to the methanol is 10:1-2:100, respectively;
(2) Dissolving perfluoroalkyl mercaptan in deionized water, adding nano molybdenum disulfide powder, stirring and dispersing, carrying out ultrasonic treatment for a certain time, filtering, washing with methanol, and carrying out vacuum drying to obtain modified nano molybdenum disulfide powder; wherein the mass ratio of the nano molybdenum disulfide powder to the perfluoroalkyl mercaptan to the deionized water is 10:10-15:100;
(3) Dispersing the modified polytetrafluoroethylene micro powder and the modified nano molybdenum disulfide powder in methanol, spraying and depositing on the surface of a polycarbonate substrate, and drying in vacuum to obtain a wear-resistant super-hydrophobic polycarbonate substrate; wherein the mass ratio of the modified polytetrafluoroethylene micro powder to the modified nano molybdenum disulfide powder to the methanol is 10-14:5-7:100.
2. the method for preparing a polycarbonate superhydrophobic substrate of claim 1, wherein: the particle size of the polytetrafluoroethylene micro powder is 20-30 mu m, and the particle size of the nano molybdenum disulfide powder is 100-200nm.
3. The method for preparing a polycarbonate superhydrophobic substrate according to claim 1, wherein: the perfluoroalkyl mercaptan is 1H, 2H-perfluorooctanethiol, 1H, 2H-perfluorodecanethiol 1H, 2H-perfluorododecanethiol.
4. The method for preparing a polycarbonate superhydrophobic substrate of claim 1, wherein: in the step (1), the temperature of the irradiation reaction is room temperature, and the irradiation dose is 30-50kGy.
5. The method for preparing a polycarbonate superhydrophobic substrate of claim 1, wherein: in the step (2), the ultrasonic power of ultrasonic treatment is 500-1000W, and the time is 18-24h.
6. The method for preparing a polycarbonate superhydrophobic substrate according to claim 1, wherein: in the step (3), the spray amount of the spray deposition is 250-350g/m 2 The diameter of the spray hole is 0.7-1mm, the spray pressure is 2-4bar, and the distance is 10-15cm.
7. The method for preparing a polycarbonate superhydrophobic substrate according to claim 1, wherein: in the step (3), the mass ratio of the modified polytetrafluoroethylene micro powder to the modified nano molybdenum disulfide powder to the methanol is 10:5:100 or 12:6:100 or 14:7:100.
8. an abrasion-resistant superhydrophobic polycarbonate substrate prepared by the method of any of claims 1-7.
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| CN115895009B (en) | 2024-04-05 |
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