CN116618267B - Photo-thermal induced phase separation-based surface hydrophilic-hydrophobic patterning construction method - Google Patents
Photo-thermal induced phase separation-based surface hydrophilic-hydrophobic patterning construction method Download PDFInfo
- Publication number
- CN116618267B CN116618267B CN202310491817.2A CN202310491817A CN116618267B CN 116618267 B CN116618267 B CN 116618267B CN 202310491817 A CN202310491817 A CN 202310491817A CN 116618267 B CN116618267 B CN 116618267B
- Authority
- CN
- China
- Prior art keywords
- coating
- hydrophilic
- hydrophobic
- resin
- phase separation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005191 phase separation Methods 0.000 title claims abstract description 62
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000000059 patterning Methods 0.000 title claims abstract description 21
- 238000000576 coating method Methods 0.000 claims abstract description 142
- 229920005989 resin Polymers 0.000 claims abstract description 134
- 239000011347 resin Substances 0.000 claims abstract description 134
- 239000011248 coating agent Substances 0.000 claims abstract description 129
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 80
- 238000002844 melting Methods 0.000 claims abstract description 36
- 230000008018 melting Effects 0.000 claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 35
- 238000003756 stirring Methods 0.000 claims abstract description 34
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000000758 substrate Substances 0.000 claims abstract description 25
- 239000000853 adhesive Substances 0.000 claims abstract description 16
- 230000001070 adhesive effect Effects 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 13
- 239000003960 organic solvent Substances 0.000 claims abstract description 7
- 238000005266 casting Methods 0.000 claims abstract description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 58
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 57
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 57
- 239000003973 paint Substances 0.000 claims description 47
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 28
- GAEKPEKOJKCEMS-UHFFFAOYSA-N gamma-valerolactone Chemical compound CC1CCC(=O)O1 GAEKPEKOJKCEMS-UHFFFAOYSA-N 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 20
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 14
- 238000013461 design Methods 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 4
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 229920002620 polyvinyl fluoride Polymers 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 239000010963 304 stainless steel Substances 0.000 claims description 2
- 229910000619 316 stainless steel Inorganic materials 0.000 claims description 2
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- 229920000178 Acrylic resin Polymers 0.000 claims description 2
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 2
- 229920000180 alkyd Polymers 0.000 claims description 2
- 229920003180 amino resin Polymers 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 229920005749 polyurethane resin Polymers 0.000 claims description 2
- 238000010345 tape casting Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 14
- 238000010438 heat treatment Methods 0.000 abstract description 12
- 230000004048 modification Effects 0.000 abstract description 6
- 238000012986 modification Methods 0.000 abstract description 6
- 230000001939 inductive effect Effects 0.000 abstract description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 67
- 239000010935 stainless steel Substances 0.000 description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 33
- 238000005303 weighing Methods 0.000 description 27
- 238000012360 testing method Methods 0.000 description 19
- 239000012046 mixed solvent Substances 0.000 description 11
- 229920002959 polymer blend Polymers 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 10
- 239000008367 deionised water Substances 0.000 description 10
- 229910021641 deionized water Inorganic materials 0.000 description 10
- 238000004506 ultrasonic cleaning Methods 0.000 description 10
- 239000004033 plastic Substances 0.000 description 9
- 229920003023 plastic Polymers 0.000 description 9
- 238000004064 recycling Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 8
- 230000002269 spontaneous effect Effects 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000001000 micrograph Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000000053 physical method Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000013475 authorization Methods 0.000 description 2
- 238000005202 decontamination Methods 0.000 description 2
- 230000003588 decontaminative effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000017 hydrogel Substances 0.000 description 2
- 125000001165 hydrophobic group Chemical group 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 230000005661 hydrophobic surface Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004093 laser heating Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000002715 modification method Methods 0.000 description 1
- 239000002052 molecular layer Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/04—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a surface receptive to ink or other liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
- B05D5/083—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface involving the use of fluoropolymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/22—Removing surface-material, e.g. by engraving, by etching
Abstract
The invention belongs to the field of surface modification, and discloses a surface hydrophilic and hydrophobic patterning construction method based on photo-thermal induced phase separation, which comprises the following specific steps: dissolving hydrophilic resin adhesive in mixed organic solvent, adding hydrophobic fluorocarbon resin powder in proportion, stirring to disperse the hydrophobic fluorocarbon resin powder in hydrophilic resin solution uniformly and stably to obtain the coating; dripping the sucked coating on the surface of the cleaned substrate, casting to form a film, and drying for later use; designing hydrophilic and hydrophobic patterns by using drawing software, introducing the hydrophilic and hydrophobic patterns into a laser melting instrument, scanning the dried coating by a laser beam according to a pattern path, heating and melting the coating, inducing phase separation, obtaining a fluorocarbon resin enriched coating in a scanning area, and keeping the uniformly distributed coating of the hydrophilic resin and the hydrophobic fluorocarbon resin in an unscanned area; the hydrophilic and hydrophobic pattern of the coating obtained by the invention can be designed in a personalized way, and has the characteristics of controllable phase separation degree, high precision, simple flow, small damage to the base material and wide application scene.
Description
Technical Field
The invention belongs to the field of surface modification, and particularly relates to a surface hydrophilic-hydrophobic patterning construction method based on photo-thermal induced phase separation.
Background
The hydrophilic and hydrophobic modification of the material has important application in the fields of antifouling and decontamination, biomedicine, food chemical industry and the like. The hydrophilic and hydrophobic construction of the material surface mainly comprises a physical method (such as coating, polishing and cutting, microstructure construction and the like) and a chemical method (the material surface is chemically grafted with a molecular chain containing a hydrophilic and hydrophobic group), and the physical method for constructing the hydrophilic and hydrophobic surface has the advantages of simple process, small loss and small influence on the structure and performance of a substrate, wherein the coating method is most widely applied.
In recent years, attention is paid to controllable patterning modification of the hydrophilicity and hydrophobicity of the surface of a material, and through effective control of a hydrophilic-hydrophobic region, a material with wettability anisotropy can be obtained, so that the movement behavior and track of liquid on the surface of the material can be effectively controlled, and the material is expected to be applied to droplet control (such as oil-water separation). Similarly, the construction methods of the controllable hydrophilic-hydrophobic patterns are mainly divided into physical and chemical methods, and the physical methods are as follows: changing the micro-nano level structure array arrangement on the surface of the material to change the hydrophilicity and hydrophobicity, and inducing the phase separation of polymer blends with different hydrophilicity and hydrophobicity properties; the chemical method comprises the following steps: changing the chemical composition of the local area of the surface of the material, introducing different hydrophilic and hydrophobic groups, and endowing the material with different wettability.
The Chinese patent authorization text (CN 111054610B) adopts a pulse laser processing technology and a patterning modification method to prepare the surfaces of a super oleophobic-super hydrophobic super amphiphobic region and a patterning super oleophilic-super hydrophobic hydrophilic hydrophobic region, and the surfaces are initially in isotropy in wettability; the hydrophilic and hydrophobic regions become the super-smooth regions after oil soaking, and the surface is converted into a patterned super-smooth/super-amphiphobic surface, and the surface presents wettability anisotropy. The wettability state can be changed in real time by oiling or degreasing, and the isotropy and the anisotropy are quickly converted. Chinese patent authorization text (CN 109337105B) orderly fills hydrogel in the organic silicon microstructure through the processes of surface plasma treatment, hydrogen peroxide activation, hydrophobic liquid hole sealing, cleaning, hydrogel filling and the like of the organic silicon microstructure, so as to form a hydrophilic-hydrophobic interaction distribution microstructure surface. The hydrophilic and hydrophobic patterning preparation method has advantages, but also has the problems of complex process flow, substrate damage in the processing process and the like.
Phase separation of a polymer blend refers to the phenomenon of phase separation of two or more polymers after mechanical or physical mixing due to differences in compatibility between the polymers. The phase separation of the polymer blend is widely applied to aspects such as polymer modification, polymer solar cells, microporous filter membranes, biodegradable materials, memory high polymer materials, organic light-emitting diodes and the like. The prior art reports that phase separation can be applied to patterning construction, the existing phase separation construction patterning method is mostly in a normal temperature spontaneous mode, mutually-insoluble polymers are dissolved in a common solvent for blending, the solution is coated on the surface of a substrate to form a film, then the solvent volatilizes, phase separation occurs, and factors influencing the formation of structural morphology in the phase separation process mainly include: the type of polymer, the substrate, the solvent, the proportion of the polymer, the concentration.
However, the spontaneous mode at normal temperature induces phase separation of the polymer blend, the degree of phase separation cannot be flexibly controlled according to application requirements, and the pattern shape obtained by phase separation cannot be specifically designed. Therefore, in order to overcome the defect that the mode of spontaneous induced phase separation at normal temperature cannot control the phase separation degree and the personalized pattern design, it is necessary to research a controllable surface hydrophilic and hydrophobic patterning construction method to obtain a coating with hydrophilic and hydrophobic property anisotropy.
Disclosure of Invention
The invention provides a surface hydrophilic-hydrophobic patterning construction method based on photo-thermal induced phase separation, and a coating with hydrophilic-hydrophobic property anisotropy is obtained. The invention dissolves the adhesive in the mixed solvent composed of organic solvent, then adds fluorocarbon resin powder into the system to disperse evenly to obtain the coating; coating the coating on the surface of a substrate, drying to form a film, and carrying out laser melting induced phase separation to obtain the target coating. According to the invention, a hydrophilic-hydrophobic pattern is constructed on the surface of the coating, and the phase separation principle of the polymer blend is utilized to induce the migration of the hydrophobic fluorocarbon resin to the surface of the coating, and the migration of the hydrophilic resin to the substrate, so that patterns with different hydrophilic-hydrophobic properties are obtained.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
a surface hydrophilic-hydrophobic patterning construction method based on photo-thermal induced phase separation comprises the following specific steps:
(1) Preparing a coating: dissolving an adhesive in a mixed organic solvent system according to a proportion to obtain an adhesive solution, adding fluorocarbon resin powder into the adhesive solution according to a proportion, and stirring to uniformly disperse the fluorocarbon resin powder in the adhesive solution;
(2) The coating process of the paint comprises the following steps: coating the coating obtained in the step (1) on the surface of a substrate by adopting a tape casting film forming method to obtain a blend coating with uniformly distributed hydrophilic/hydrophobic resin;
(3) Design of hydrophilic and hydrophobic patterns and photo-thermal induced phase separation process: drawing a desired hydrophobic pattern by using drawing software, introducing the pattern file into a laser melting instrument, setting laser processing parameters, scanning a laser beam on the surface of the blend coating according to the introduced pattern file and the processing parameters, and carrying out melt phase separation on the blend coating locally by laser beam scanning to obtain the target coating.
The adhesive in the step (1) is hydrophilic resin, and can be one of epoxy resin, alkyd resin, acrylic resin, aqueous polyurethane resin, amino resin and polyarylsulfone resin;
the adhesive solution in the step (1) is prepared, the concentration of the adhesive is 1-30wt%, the stirring time is 2-10 h, and the stirring speed is 500-1500 rpm.
The fluorocarbon resin in the step (1) may be one of Polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polytrifluoroethylene (FEVE), and polyvinyl fluoride (PVF).
The addition amount of the fluorocarbon resin in the step (1) is 1 to 20 percent of the mass of the binder solution
The organic solvent system in the step (1) is at least one of N-methyl pyrrolidone (NMP), gamma valerolactone and dimethyl sulfoxide (DMSO); preferably, the organic solvent system is a mixed solvent of N-methyl pyrrolidone (NMP), gamma valerolactone and dimethyl sulfoxide (DMSO), and the mixing ratio is 4:3:2.
The fluorocarbon resin is dispersed in the step (1) by stirring with a magnetic rotor at a stirring speed of 500-1500 rpm for 6-24 h.
The base material in the step (2) is one of 304 stainless steel, 316 stainless steel, aluminum alloy, titanium alloy and quartz glass, and is respectively subjected to ultrasonic cleaning by absolute ethyl alcohol and deionized water for 10-30 min before coating.
The specific flow of the casting film forming method in the step (2) is as follows: sucking 1-5 ml of the coating obtained in the step (1), dripping the coating on the surface of the cleaned substrate, tilting the substrate to enable the coating to uniformly flow and cast on the surface of the substrate, and then placing the substrate coated with the coating in a baking oven at 50-150 ℃ for drying for 2-10 h until the solvent is completely volatilized, thus obtaining the hydrophilic/hydrophobic resin blend coating.
The drawing software in the step (3) is CAD, the laser melting instrument is a laboratory self-purchasing instrument (GH 750, dongguan doctor laser technology), and the laser melting instrument generally used for 3D printing can be used as a heat supply source of the invention.
The hydrophobic pattern in the step (3) is a rectangle with the width (1 cm-3 cm) and the length (5 cm-10 cm) or a curve pattern with the width (1 cm-3 cm), the length (5 cm-10 cm) and the bending angle of 10-60 degrees, and the individualized pattern can be designed according to practical application.
The processing parameters in the step (3) are as follows: the laser beam irradiation temperature is 180-380 ℃, the laser beam scanning speed is 0.5-1 mm/s, and the scanning interval is 0.5-1 mm; the scanning times are 1-4 times.
The melt phase separation process in step (3) is: the fluorocarbon resin and the hydrophilic resin are not compatible thermodynamically, after the temperature of the system is increased to the melting temperature, the fluorocarbon resin and the hydrophilic resin are subjected to melt flow, as the fluorocarbon resin has extremely low surface energy, the molecular chains of the fluorocarbon resin migrate to the surface of the coating, the molecular chains of the hydrophilic resin migrate to the opposite direction, the surface of the regional coating which is finally subjected to laser melting is a fluorocarbon resin molecular layer, and the surface of the regional coating which is not melted is a uniform surface for hydrophilic-hydrophobic resin blending.
The mechanism of the invention is as follows:
the invention develops a construction method of hydrophilic and hydrophobic patterning based on laser-induced polymer blend phase separation, wherein the polymer blend mainly consists of hydrophobic fluorocarbon resin and hydrophilic resin. Selective laser melting is an additive manufacturing technology applied to 3D printing of powder materials, and no researchers have applied the laser melting technology to induce phase separation of polymer blends, so as to realize micro-domain control of the temperature of a blend system, thereby controlling the phase separation process. Based on the characteristics of the thermodynamically incompatible polymer blend phase separation principle and the selective laser melting technology, the invention creatively combines the two, and realizes the controllable surface hydrophilic and hydrophobic patterning construction. The defects that the mode of spontaneous induced phase separation at normal temperature cannot control the phase separation degree and the personalized pattern design are overcome.
The invention focuses on the characteristics of the laser melting technology that a specific pattern structure can be designed and the control can be precisely carried out, takes laser as a heat source, and controls the temperature of a micro-area scanned by the laser so as to induce two polymers of the coating to generate melt phase separation, wherein the phase separation degree can be controlled by the temperature of the heat source provided by the laser and the scanning time; the phase separation pattern is designed by CAD software. By laser melting technology, a specific area of the coating is heated to be above the melting temperature of the blend, so that the blend is melted to undergo phase separation, and the coating with controllable hydrophilic/hydrophobic resin distribution is obtained. The coating with controllable hydrophilic and hydrophobic patterns is expected to be applied to scenes requiring coexistence of hydrophilic and hydrophobic performances such as oil-water separation.
Compared with the prior art, the construction method for the surface hydrophilic-hydrophobic patterning based on photo-thermal induced phase separation has the following advantages and beneficial effects:
(1) Based on the principle that the phase separation is caused by the thermodynamic incompatibility of polymer blends, the invention adopts photo-thermal induced phase separation, the prepared coating has controllable coating distribution, the degree of phase separation is increased along with the increase of scanning times (the heat treatment time is prolonged), and the spontaneous phase separation at normal temperature cannot control the degree of phase separation and design the phase separation pattern.
(2) The phase separation of polymer blends needs to meet certain thermodynamic conditions. For systems with high thermodynamic barriers, the high energy barrier needs to be overcome by the occurrence of phase separation, laser is used as a heat source, the energy required for overcoming the energy barrier can be provided, and the energy can be flexibly regulated and controlled by adjusting the laser power.
(3) For systems with slower phase separation, the phase separation process is accelerated by laser heating, and the pattern of phase separation can be controlled by heating in the micro-domains.
(4) The main components of the coating are fluorocarbon resin and hydrophilic resin, the fluorocarbon resin provides excellent hydrophobic performance, the hydrophilic resin provides hydrophilic performance, and the hydrophilic resin has strong adhesion with a substrate, so that the obtained coating has better bonding strength with the substrate.
(5) The invention utilizes CAD drawing and laser melting technology, and the prepared coating has a hydrophobic pattern which is precise and controllable and can be designed in real time according to the requirement.
(6) The hydrophilic/hydrophobic resin coating prepared by the invention has hydrophilic and hydrophobic effects, provides good lubricity and wear resistance, and has excellent heat resistance, so that the coating has application prospects in the aspects of decontamination, dirt resistance, oil-water separation, corrosion resistance, aging resistance and the like of a substrate.
Drawings
FIG. 1 is a flow chart of the formulation of the coating used in the present invention;
FIG. 2 is a flow chart of the coating process and laser melting of the coating of the present invention;
FIG. 3 is a schematic representation of the hydrophilic-hydrophobic patterns of examples 1-4 and examples 7-9;
FIG. 4 is a schematic representation of the hydrophilic-hydrophobic patterns of examples 5-6;
FIG. 5 is a schematic illustration of the phase separation of the coating of the present invention after laser beam scanning;
FIG. 6 is the water contact angle test results for the hydrophilic and hydrophobic areas of examples 1-4;
FIG. 7 is the water contact angle test results for the hydrophilic and hydrophobic areas of examples 5-9;
FIG. 8 is a graph showing the change in coefficient of friction for a stainless steel substrate, hydrophobic areas with different scan times;
fig. 9 is a scanning electron microscope image of an unscanned area and a scanned area.
Detailed Description
The present invention will be further described with reference to examples and drawings, but embodiments of the present invention are not limited thereto. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
Example 1
(1) Preparing a coating: weighing 2g of polyarylsulfone resin in a single-neck flask with a magnetic rotor, weighing 4.44g of NMP, 3.33g of gamma-valerolactone and 2.22g of DMSO according to the mass ratio of 4:3:2, and stirring at a rotating speed of 500rpm for 2 hours, wherein the polyarylsulfone resin is completely dissolved in a mixed solvent to obtain a polyarylsulfone resin solution with the concentration of 20 wt%; and weighing 0.12g of polytetrafluoroethylene powder according to 1 weight percent of the mass of the polyarylsulfone resin solution, slowly adding the polytetrafluoroethylene powder into the polyarylsulfone resin solution in a stirring state, and continuously stirring for 6 hours to uniformly and stably disperse the polytetrafluoroethylene powder in the polyarylsulfone resin solution to finally obtain the target coating.
(2) The coating process of the paint comprises the following steps: before the coating is coated, the stainless steel sheet is pretreated, absolute ethyl alcohol and deionized water are respectively used for ultrasonic cleaning of the stainless steel sheet for 15min, and then the stainless steel sheet is dried for standby; sucking 2ml of prepared paint by using a plastic suction pipe, slowly dripping the paint on the surface of clean and dry stainless steel, then tilting the stainless steel to ensure that the paint is completely cast on the surface of the stainless steel, and re-flowing the excessive paint into a container for recycling; and finally, placing the stainless steel sheet coated with the coating in a 50 ℃ oven for drying for 6 hours until the solvent is completely volatilized, and obtaining the coating with uniformly distributed polytetrafluoroethylene/polyarylsulfone resin.
(3) Design of hydrophilic and hydrophobic patterns and laser melting and heating treatment: designing a target pattern in CAD, wherein the pattern is a path of laser scanning, so that the pattern is finally a hydrophobic pattern of polytetrafluoroethylene enriched on the surface of the coating, the non-irradiated area is uniformly distributed by polytetrafluoroethylene/polyarylsulfone resin, the ratio of the polyarylsulfone resin is 94.79%, and the uniform area is a hydrophilic area; in this example, a simple rectangular pattern of 1cm×5cm was drawn, and introduced into a laser melting apparatus, and a laser beam was scanned according to the pattern path of the introduced document to obtain a target pattern.
The coating prepared in this example was subjected to a water contact angle test to test a hydrophobic pattern region and a hydrophilic region, respectively.
Example 2
(1) Preparing a coating: weighing 2g of polyarylsulfone resin in a single-neck flask with a magnetic rotor, weighing 4.44g of NMP, 3.33g of gamma-valerolactone and 2.22g of DMSO according to the mass ratio of 4:3:2, and stirring at a rotating speed of 500rpm for 2 hours, wherein the polyarylsulfone resin is completely dissolved in a mixed solvent to obtain a polyarylsulfone resin solution with the concentration of 20 wt%; and weighing 0.24g of polytetrafluoroethylene powder according to 2 weight percent of the mass of the polyarylsulfone resin solution, slowly adding the polytetrafluoroethylene powder into the polyarylsulfone resin solution in a stirring state, and continuously stirring for 6 hours to uniformly and stably disperse the polytetrafluoroethylene powder in the polyarylsulfone resin solution to finally obtain the target coating.
(2) The coating process of the paint comprises the following steps: before the coating is coated, the stainless steel sheet is pretreated, absolute ethyl alcohol and deionized water are respectively used for ultrasonic cleaning of the stainless steel sheet for 15min, and then the stainless steel sheet is dried for standby; sucking 2ml of prepared paint by using a plastic suction pipe, slowly dripping the paint on the surface of clean and dry stainless steel, then tilting the stainless steel to ensure that the paint is completely cast on the surface of the stainless steel, and re-flowing the excessive paint into a container for recycling; and finally, placing the stainless steel sheet coated with the coating in a 50 ℃ oven for drying for 6 hours until the solvent is completely volatilized, and obtaining the coating with uniformly distributed polytetrafluoroethylene/polyarylsulfone resin.
(3) Design of hydrophilic and hydrophobic patterns and laser melting and heating treatment: designing a target pattern in CAD, wherein the pattern is a path of laser scanning, so that the pattern is finally a hydrophobic pattern of polytetrafluoroethylene enriched on the surface of the coating, the non-irradiated area is uniformly distributed by polytetrafluoroethylene/polyarylsulfone resin, the ratio of the polyarylsulfone resin is 89.29%, and the uniform area is a hydrophilic area; in this example, a simple rectangular pattern of 1cm×5cm was drawn, and introduced into a laser melting apparatus, and a laser beam was scanned according to the pattern path of the introduced document to obtain a target pattern.
The coating prepared in this example was subjected to a water contact angle test, and a hydrophobic pattern region and a hydrophilic region were respectively tested; the coefficient of friction was measured for the hydrophobic region.
Example 3
(1) Preparing a coating: weighing 2g of polyarylsulfone resin in a single-neck flask with a magnetic rotor, weighing 4.44g of NMP, 3.33g of gamma-valerolactone and 2.22g of DMSO according to the mass ratio of 4:3:2, and stirring at a rotating speed of 500rpm for 2 hours, wherein the polyarylsulfone resin is completely dissolved in a mixed solvent to obtain a polyarylsulfone resin solution with the concentration of 20 wt%; and weighing 0.6g of polytetrafluoroethylene powder according to 5 weight percent of the mass of the polyarylsulfone resin solution, slowly adding the polytetrafluoroethylene powder into the polyarylsulfone resin solution in a stirring state, and continuously stirring for 6 hours to uniformly and stably disperse the polytetrafluoroethylene powder in the polyarylsulfone resin solution to finally obtain the target coating.
(2) The coating process of the paint comprises the following steps: before the coating is coated, the stainless steel sheet is pretreated, absolute ethyl alcohol and deionized water are respectively used for ultrasonic cleaning of the stainless steel sheet for 15min, and then the stainless steel sheet is dried for standby; sucking 2ml of prepared paint by using a plastic suction pipe, slowly dripping the paint on the surface of clean and dry stainless steel, then tilting the stainless steel to ensure that the paint is completely cast on the surface of the stainless steel, and re-flowing the excessive paint into a container for recycling; and finally, placing the stainless steel sheet coated with the coating in a 50 ℃ oven for drying for 6 hours until the solvent is completely volatilized, and obtaining the coating with uniformly distributed polytetrafluoroethylene/polyarylsulfone resin.
(3) Design of hydrophilic and hydrophobic patterns and laser melting and heating treatment: designing a target pattern in CAD, wherein the pattern is a path of laser scanning, so that the pattern is finally a hydrophobic pattern of polytetrafluoroethylene enriched on the surface of the coating, the non-irradiated area is uniformly distributed by polytetrafluoroethylene/polyarylsulfone resin, the ratio of the polyarylsulfone resin is 76.92%, and the uniform area is a hydrophilic area; in this example, a simple rectangular pattern of 1cm×5cm was drawn, and introduced into a laser melting apparatus, and a laser beam was scanned according to the pattern path of the introduced document to obtain a target pattern.
The coating prepared in this example was subjected to a water contact angle test to test a hydrophobic pattern region and a hydrophilic region, respectively.
Example 4
(1) Preparing a coating: weighing 2g of polyarylsulfone resin in a single-neck flask with a magnetic rotor, weighing 4.44g of NMP, 3.33g of gamma-valerolactone and 2.22g of DMSO according to the mass ratio of 4:3:2, and stirring at a rotating speed of 500rpm for 2 hours, wherein the polyarylsulfone resin is completely dissolved in a mixed solvent to obtain a polyarylsulfone resin solution with the concentration of 20 wt%; and weighing 1.2g of polytetrafluoroethylene powder according to 10 weight percent of the mass of the polyarylsulfone resin solution, slowly adding the polytetrafluoroethylene powder into the polyarylsulfone resin solution in a stirring state, and continuously stirring for 6 hours to uniformly and stably disperse the polytetrafluoroethylene powder in the polyarylsulfone resin solution to finally obtain the target coating.
(2) The coating process of the paint comprises the following steps: before the coating is coated, the stainless steel sheet is pretreated, absolute ethyl alcohol and deionized water are respectively used for ultrasonic cleaning of the stainless steel sheet for 15min, and then the stainless steel sheet is dried for standby; sucking 2ml of prepared paint by using a plastic suction pipe, slowly dripping the paint on the surface of clean and dry stainless steel, then tilting the stainless steel to ensure that the paint is completely cast on the surface of the stainless steel, and re-flowing the excessive paint into a container for recycling; and finally, placing the stainless steel sheet coated with the coating in a 50 ℃ oven for drying for 6 hours until the solvent is completely volatilized, and obtaining the coating with uniformly distributed polytetrafluoroethylene/polyarylsulfone resin.
(3) Design of hydrophilic and hydrophobic patterns and laser melting and heating treatment: designing a target pattern in CAD, wherein the pattern is a path of laser scanning, so that the pattern is finally a hydrophobic pattern of polytetrafluoroethylene enriched on the surface of the coating, the non-irradiated area is uniformly distributed by polytetrafluoroethylene/polyarylsulfone resin, the ratio of the polyarylsulfone resin is 62.50%, and the uniform area is a hydrophilic area; in this example, a simple rectangular pattern of 1cm×5cm was drawn, and introduced into a laser melting apparatus, and a laser beam was scanned according to the pattern path of the introduced document to obtain a target pattern.
The coating prepared in this example was subjected to a water contact angle test to test a hydrophobic pattern region and a hydrophilic region, respectively.
Example 5
(1) Preparing a coating: weighing 2g of polyarylsulfone resin in a single-neck flask with a magnetic rotor, weighing 4.44g of NMP, 3.33g of gamma-valerolactone and 2.22g of DMSO according to the mass ratio of 4:3:2, and stirring at a rotating speed of 500rpm for 2 hours, wherein the polyarylsulfone resin is completely dissolved in a mixed solvent to obtain a polyarylsulfone resin solution with the concentration of 20 wt%; and weighing 0.12g of polytetrafluoroethylene powder according to 1 weight percent of the mass of the polyarylsulfone resin solution, slowly adding the polytetrafluoroethylene powder into the polyarylsulfone resin solution in a stirring state, and continuously stirring for 6 hours to uniformly and stably disperse the polytetrafluoroethylene powder in the polyarylsulfone resin solution to finally obtain the target coating.
(2) The coating process of the paint comprises the following steps: before the coating is coated, the stainless steel sheet is pretreated, absolute ethyl alcohol and deionized water are respectively used for ultrasonic cleaning of the stainless steel sheet for 15min, and then the stainless steel sheet is dried for standby; sucking 2ml of prepared paint by using a plastic suction pipe, slowly dripping the paint on the surface of clean and dry stainless steel, then tilting the stainless steel to ensure that the paint is completely cast on the surface of the stainless steel, and re-flowing the excessive paint into a container for recycling; and finally, placing the stainless steel sheet coated with the coating in a 50 ℃ oven for drying for 6 hours until the solvent is completely volatilized, and obtaining the coating with uniformly distributed polytetrafluoroethylene/polyarylsulfone resin.
(3) Design of hydrophilic and hydrophobic patterns and laser melting and heating treatment: designing a target pattern in CAD, wherein the pattern is a path of laser scanning, so that the pattern is finally a hydrophobic pattern of polytetrafluoroethylene enriched on the surface of the coating, the non-irradiated area is uniformly distributed by polytetrafluoroethylene/polyarylsulfone resin, the ratio of the polyarylsulfone resin is 94.79%, and the uniform area is a hydrophilic area; in this example, a curve pattern having a width of 1cm, a length of 8cm, and a bending angle of 30 ° was drawn, and the pattern was introduced into a laser melting apparatus, and a laser beam was scanned according to a pattern path of an introduced document, to obtain a target pattern.
The coating prepared in this example was subjected to a water contact angle test to test a hydrophobic pattern region and a hydrophilic region, respectively.
Example 6
(1) Preparing a coating: weighing 2g of polyarylsulfone resin in a single-neck flask with a magnetic rotor, weighing 4.44g of NMP, 3.33g of gamma-valerolactone and 2.22g of DMSO according to the mass ratio of 4:3:2, and stirring at a rotating speed of 500rpm for 2 hours, wherein the polyarylsulfone resin is completely dissolved in a mixed solvent to obtain a polyarylsulfone resin solution with the concentration of 20 wt%; and weighing 0.24g of polytetrafluoroethylene powder according to 2 weight percent of the mass of the polyarylsulfone resin solution, slowly adding the polytetrafluoroethylene powder into the polyarylsulfone resin solution in a stirring state, and continuously stirring for 6 hours to uniformly and stably disperse the polytetrafluoroethylene powder in the polyarylsulfone resin solution to finally obtain the target coating.
(2) The coating process of the paint comprises the following steps: before the coating is coated, the stainless steel sheet is pretreated, absolute ethyl alcohol and deionized water are respectively used for ultrasonic cleaning of the stainless steel sheet for 15min, and then the stainless steel sheet is dried for standby; sucking 2ml of prepared paint by using a plastic suction pipe, slowly dripping the paint on the surface of clean and dry stainless steel, then tilting the stainless steel to ensure that the paint is completely cast on the surface of the stainless steel, and re-flowing the excessive paint into a container for recycling; and finally, placing the stainless steel sheet coated with the coating in a 50 ℃ oven for drying for 6 hours until the solvent is completely volatilized, and obtaining the coating with uniformly distributed polytetrafluoroethylene/polyarylsulfone resin.
(3) Design of hydrophilic and hydrophobic patterns and laser melting and heating treatment: designing a target pattern in CAD, wherein the pattern is a path of laser scanning, so that the pattern is finally a hydrophobic pattern of polytetrafluoroethylene enriched on the surface of the coating, the non-irradiated area is uniformly distributed by polytetrafluoroethylene/polyarylsulfone resin, the ratio of the polyarylsulfone resin is 89.29%, and the uniform area is a hydrophilic area; in this example, a curve pattern having a width of 1cm, a length of 8cm, and a bending angle of 30 ° was drawn, and the pattern was introduced into a laser melting apparatus, and a laser beam was scanned according to a pattern path of an introduced document, to obtain a target pattern.
The coating prepared in this example was subjected to a water contact angle test to test a hydrophobic pattern region and a hydrophilic region, respectively.
Example 7
(1) Preparing a coating: weighing 2g of polyarylsulfone resin in a single-neck flask with a magnetic rotor, weighing 4.44g of NMP, 3.33g of gamma-valerolactone and 2.22g of DMSO according to the mass ratio of 4:3:2, and stirring at a rotating speed of 500rpm for 2 hours, wherein the polyarylsulfone resin is completely dissolved in a mixed solvent to obtain a polyarylsulfone resin solution with the concentration of 20 wt%; and weighing 0.24g of polytetrafluoroethylene powder according to 2 weight percent of the mass of the polyarylsulfone resin solution, slowly adding the polytetrafluoroethylene powder into the polyarylsulfone resin solution in a stirring state, and continuously stirring for 6 hours to uniformly and stably disperse the polytetrafluoroethylene powder in the polyarylsulfone resin solution to finally obtain the target coating.
(2) The coating process of the paint comprises the following steps: before the coating is coated, the stainless steel sheet is pretreated, absolute ethyl alcohol and deionized water are respectively used for ultrasonic cleaning of the stainless steel sheet for 15min, and then the stainless steel sheet is dried for standby; sucking 2ml of prepared paint by using a plastic suction pipe, slowly dripping the paint on the surface of clean and dry stainless steel, then tilting the stainless steel to ensure that the paint is completely cast on the surface of the stainless steel, and re-flowing the excessive paint into a container for recycling; and finally, placing the stainless steel sheet coated with the coating in a 50 ℃ oven for drying for 6 hours until the solvent is completely volatilized, and obtaining the coating with uniformly distributed polytetrafluoroethylene/polyarylsulfone resin.
(3) Design of hydrophilic and hydrophobic patterns and laser melting and heating treatment: designing a target pattern in CAD, wherein the pattern is a path of laser scanning, so that the pattern is finally a hydrophobic pattern of polytetrafluoroethylene enriched on the surface of the coating, the non-irradiated area is uniformly distributed by polytetrafluoroethylene/polyarylsulfone resin, the ratio of the polyarylsulfone resin is 89.29%, and the uniform area is a hydrophilic area; in this example, a simple rectangular pattern of 1cm×5cm was drawn, and introduced into a laser melting apparatus, and a laser beam was scanned according to the pattern path of the introduced document, and scanned repeatedly for a total of 2 times to obtain a target pattern.
The coating prepared in this example was subjected to a water contact angle test, and a hydrophobic pattern region and a hydrophilic region were respectively tested; the coefficient of friction was measured for the hydrophobic region.
Example 8
(1) Preparing a coating: weighing 2g of polyarylsulfone resin in a single-neck flask with a magnetic rotor, weighing 4.44g of NMP, 3.33g of gamma-valerolactone and 2.22g of DMSO according to the mass ratio of 4:3:2, and stirring at a rotating speed of 500rpm for 2 hours, wherein the polyarylsulfone resin is completely dissolved in a mixed solvent to obtain a polyarylsulfone resin solution with the concentration of 20 wt%; and weighing 0.24g of polytetrafluoroethylene powder according to 2 weight percent of the mass of the polyarylsulfone resin solution, slowly adding the polytetrafluoroethylene powder into the polyarylsulfone resin solution in a stirring state, and continuously stirring for 6 hours to uniformly and stably disperse the polytetrafluoroethylene powder in the polyarylsulfone resin solution to finally obtain the target coating.
(2) The coating process of the paint comprises the following steps: before the coating is coated, the stainless steel sheet is pretreated, absolute ethyl alcohol and deionized water are respectively used for ultrasonic cleaning of the stainless steel sheet for 15min, and then the stainless steel sheet is dried for standby; sucking 2ml of prepared paint by using a plastic suction pipe, slowly dripping the paint on the surface of clean and dry stainless steel, then tilting the stainless steel to ensure that the paint is completely cast on the surface of the stainless steel, and re-flowing the excessive paint into a container for recycling; and finally, placing the stainless steel sheet coated with the coating in a 50 ℃ oven for drying for 6 hours until the solvent is completely volatilized, and obtaining the coating with uniformly distributed polytetrafluoroethylene/polyarylsulfone resin.
(3) Design of hydrophilic and hydrophobic patterns and laser melting and heating treatment: designing a target pattern in CAD, wherein the pattern is a path of laser scanning, so that the pattern is finally a hydrophobic pattern of polytetrafluoroethylene enriched on the surface of the coating, the non-irradiated area is uniformly distributed by polytetrafluoroethylene/polyarylsulfone resin, the ratio of the polyarylsulfone resin is 89.29%, and the uniform area is a hydrophilic area; in this example, a simple rectangular pattern of 1cm×5cm was drawn, and introduced into a laser melting apparatus, and a laser beam was scanned according to the pattern path of the introduced document, and scanned repeatedly for a total of 3 times to obtain a target pattern.
The coating prepared in this example was subjected to a water contact angle test, and a hydrophobic pattern region and a hydrophilic region were respectively tested; the coefficient of friction was measured for the hydrophobic region.
Example 9
(1) Preparing a coating: weighing 2g of polyarylsulfone resin in a single-neck flask with a magnetic rotor, weighing 4.44g of NMP, 3.33g of gamma-valerolactone and 2.22g of DMSO according to the mass ratio of 4:3:2, and stirring at a rotating speed of 500rpm for 2 hours, wherein the polyarylsulfone resin is completely dissolved in a mixed solvent to obtain a polyarylsulfone resin solution with the concentration of 20 wt%; and weighing 0.24g of polytetrafluoroethylene powder according to 2 weight percent of the mass of the polyarylsulfone resin solution, slowly adding the polytetrafluoroethylene powder into the polyarylsulfone resin solution in a stirring state, and continuously stirring for 6 hours to uniformly and stably disperse the polytetrafluoroethylene powder in the polyarylsulfone resin solution to finally obtain the target coating.
(2) The coating process of the paint comprises the following steps: before the coating is coated, the stainless steel sheet is pretreated, absolute ethyl alcohol and deionized water are respectively used for ultrasonic cleaning of the stainless steel sheet for 15min, and then the stainless steel sheet is dried for standby; sucking 2ml of prepared paint by using a plastic suction pipe, slowly dripping the paint on the surface of clean and dry stainless steel, then tilting the stainless steel to ensure that the paint is completely cast on the surface of the stainless steel, and re-flowing the excessive paint into a container for recycling; and finally, placing the stainless steel sheet coated with the coating in a 50 ℃ oven for drying for 6 hours until the solvent is completely volatilized, and obtaining the coating with uniformly distributed polytetrafluoroethylene/polyarylsulfone resin.
(3) Design of hydrophilic and hydrophobic patterns and laser melting and heating treatment: designing a target pattern in CAD, wherein the pattern is a path of laser scanning, so that the pattern is finally a hydrophobic pattern of polytetrafluoroethylene enriched on the surface of the coating, the non-irradiated area is uniformly distributed by polytetrafluoroethylene/polyarylsulfone resin, the ratio of the polyarylsulfone resin is 89.29%, and the uniform area is a hydrophilic area; in this example, a simple rectangular pattern of 1cm×5cm was drawn, and introduced into a laser melting apparatus, and a laser beam was scanned according to the pattern path of the introduced document, and scanned repeatedly for a total of 4 times, to obtain a target pattern.
The coating prepared in this example was subjected to a water contact angle test, and a hydrophobic pattern region and a hydrophilic region were respectively tested; the coefficient of friction was measured for the hydrophobic region.
Determination of the coefficient of friction: the sliding friction coefficient of the coating is detected by using a friction and wear and mechanical property tester, parameters are set, namely a stainless steel ball with the diameter of 8mm is selected as a carrier, a linear reciprocating friction experiment is carried out, a normal load of 3N is added, the friction distance is 5mm, the friction speed is 5mm/s, and the result is averaged. This method is a well-known method for measuring the coefficient of friction.
FIG. 6 is the water contact angle test results for the hydrophilic and hydrophobic areas of examples 1-4; after laser melting induction phase separation, fluorocarbon resin migrates to the surface of the coating to obtain a hydrophobic region with a water contact angle greater than 120 DEG, and the water contact angles of regions which are not scanned by laser are all smaller than 90 DEG, belonging to a hydrophilic region, and in addition, the water contact angle of the hydrophilic region slightly increases along with the increase of the content of the fluorocarbon resin, but still belongs to the hydrophilic category.
FIG. 7 is the water contact angle test results for the hydrophilic and hydrophobic areas of examples 5-9; the water contact angle test results of examples 5-6 show that different hydrophilic-hydrophobic patterns have no obvious effect on the water contact angles of the hydrophobic region and the hydrophilic region; examples 7 to 9 show that: with the increase of the scanning times (the photo-thermal induced phase separation time is prolonged), the water contact angle of the hydrophobic region tends to increase, and after the 4 th scanning, the water contact angle of the hydrophobic region is not obviously different from the 3 rd scanning, which indicates that the ratio of fluorocarbon resin on the surface of the coating increases, namely the phase separation degree deepens with the scanning times, and after the 3 th scanning, the ratio of fluorocarbon resin on the surface of the coating reaches the maximum.
FIG. 8 is a graph showing the change in coefficient of friction for a stainless steel substrate, hydrophobic areas with different scan times; compared with a blank stainless steel substrate and an unscanned area, the friction coefficient of the area subjected to laser beam scanning induced phase separation is obviously reduced, when the scanning times reach 3 times, the lowest friction coefficient is obtained, the scanning times are increased to 4 times, the friction coefficient is not obviously reduced, the fluorocarbon resin ratio of the surface of the coating reaches the maximum value when the scanning is performed for 3 times, and the self-lubricity of the fluorocarbon resin obviously improves the lubricating property of the substrate.
FIG. 9 is a scanning electron microscope image of an unscanned area and a scanned area; scanning electron microscope image display of the non-scanned (hydrophilic) area and the scanned (hydrophobic) area: the non-scanned areas can observe the distribution of fluorocarbon resin particles with obvious gaps between the particles; after laser beam scanning, the coating is subjected to melt phase separation, fluorocarbon resin particles are melted to form a whole, and a fluorocarbon resin layer with good integrity is formed on the surface of the coating, so that the coating is subjected to melt phase separation.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (5)
1. The construction method of the surface hydrophilic-hydrophobic patterning based on photo-thermal induced phase separation is characterized by comprising the following specific steps:
(1) Preparing a coating: dissolving an adhesive in a mixed organic solvent system to obtain an adhesive solution, adding fluorocarbon resin powder into the adhesive solution, and stirring to uniformly disperse the fluorocarbon resin powder in the adhesive solution;
(2) The coating process of the paint comprises the following steps: coating the coating obtained in the step (1) on the surface of a substrate by adopting a tape casting film forming method to obtain a blend coating with uniformly distributed hydrophilic/hydrophobic resin;
(3) Design of hydrophilic and hydrophobic patterns and photo-thermal induced phase separation process: drawing a desired hydrophobic pattern by using drawing software, introducing a pattern file into a laser melting instrument, setting laser processing parameters, scanning a laser beam on the surface of the blend coating according to the introduced pattern file and the processing parameters, and carrying out melt phase separation on the blend coating at the local part of laser beam scanning to obtain a target coating;
the adhesive in the step (1) is at least one of hydrophilic epoxy resin, hydrophilic alkyd resin, hydrophilic acrylic resin, hydrophilic polyurethane resin, hydrophilic amino resin and hydrophilic polyarylsulfone resin;
the concentration of the adhesive in the step (1) is 1-30wt%;
the fluorocarbon resin in the step (1) is at least one of polytetrafluoroethylene, polyvinylidene fluoride, polytrifluoroethylene and polyvinyl fluoride;
the addition amount of the fluorocarbon resin in the step (1) is 1-20% of the mass of the adhesive solution.
2. The construction method of the surface hydrophilic-hydrophobic patterning based on photo-thermal induced phase separation according to claim 1, wherein the construction method is characterized by comprising the following steps:
the organic solvent system in the step (1) is at least one of N-methyl pyrrolidone, gamma-valerolactone and dimethyl sulfoxide;
the substrate in the step (2) is at least one of 304 stainless steel, 316 stainless steel, aluminum alloy, titanium alloy and quartz glass.
3. The construction method of the surface hydrophilic-hydrophobic patterning based on photo-thermal induced phase separation according to claim 1, wherein the construction method is characterized by comprising the following steps: the specific flow of the casting film forming method in the step (2) is as follows: and (3) sucking 1-5 ml of the coating obtained in the step (1), dripping the coating on the surface of the cleaned substrate, tilting the substrate to enable the coating to uniformly flow and cast on the surface of the substrate, and then placing the substrate coated with the coating in a 50-150 ℃ oven for drying for 2-10 h until the solvent is completely volatilized, so as to obtain the hydrophilic/hydrophobic resin blend coating.
4. The construction method of the surface hydrophilic-hydrophobic patterning based on photo-thermal induced phase separation according to claim 1, wherein the construction method is characterized by comprising the following steps: the hydrophobic pattern in the step (3) is a rectangle with a width of 1 cm-3 cm and a length of 5 cm-10 cm or a curve pattern with a width of 1 cm-3 cm, a length of 5 cm-10 cm and a bending angle of 10-60 degrees.
5. The construction method of the surface hydrophilic-hydrophobic patterning based on photo-thermal induced phase separation according to claim 1, wherein the construction method is characterized by comprising the following steps: the processing parameters in the step (3) are as follows: the laser beam irradiation temperature is 180-380 ℃, the laser beam scanning speed is 0.5-1 mm/s, and the scanning interval is 0.5-1 mm; the scanning times are 1-4 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310491817.2A CN116618267B (en) | 2023-05-05 | 2023-05-05 | Photo-thermal induced phase separation-based surface hydrophilic-hydrophobic patterning construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310491817.2A CN116618267B (en) | 2023-05-05 | 2023-05-05 | Photo-thermal induced phase separation-based surface hydrophilic-hydrophobic patterning construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116618267A CN116618267A (en) | 2023-08-22 |
| CN116618267B true CN116618267B (en) | 2024-01-30 |
Family
ID=87591084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310491817.2A Active CN116618267B (en) | 2023-05-05 | 2023-05-05 | Photo-thermal induced phase separation-based surface hydrophilic-hydrophobic patterning construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116618267B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4616416B1 (en) * | 2010-01-13 | 2011-01-19 | 財団法人川村理化学研究所 | Patterned film having water-repellent and hydrophilic regions and method for producing the same |
| CN111736242A (en) * | 2019-09-10 | 2020-10-02 | 合肥工业大学 | Method for preparing microlens array based on patterned hydrophobic layer |
| CN111940261A (en) * | 2020-07-21 | 2020-11-17 | 华帝股份有限公司 | Base material surface treatment method |
| CN113307505A (en) * | 2021-06-18 | 2021-08-27 | 西南石油大学 | Photo-initiation prepared patterned super-hydrophilic-super-hydrophobic alternate surface and preparation method thereof |
| CN115464258A (en) * | 2022-10-28 | 2022-12-13 | 西安工业大学 | Method for preparing repairable super-hydrophobic surface with durability in one step |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112010002076T5 (en) * | 2009-05-25 | 2013-01-03 | Kawamura Institute Of Chemical Research | Hydrophobic film, structural film with hydrophobic and hydrophilic regions and a process for its preparation |
| JP5524228B2 (en) * | 2009-09-25 | 2014-06-18 | 株式会社東芝 | Pattern formation method |
-
2023
- 2023-05-05 CN CN202310491817.2A patent/CN116618267B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4616416B1 (en) * | 2010-01-13 | 2011-01-19 | 財団法人川村理化学研究所 | Patterned film having water-repellent and hydrophilic regions and method for producing the same |
| CN111736242A (en) * | 2019-09-10 | 2020-10-02 | 合肥工业大学 | Method for preparing microlens array based on patterned hydrophobic layer |
| CN111940261A (en) * | 2020-07-21 | 2020-11-17 | 华帝股份有限公司 | Base material surface treatment method |
| CN113307505A (en) * | 2021-06-18 | 2021-08-27 | 西南石油大学 | Photo-initiation prepared patterned super-hydrophilic-super-hydrophobic alternate surface and preparation method thereof |
| CN115464258A (en) * | 2022-10-28 | 2022-12-13 | 西安工业大学 | Method for preparing repairable super-hydrophobic surface with durability in one step |
Non-Patent Citations (2)
| Title |
|---|
| Phase Separation of Poly(N-isopropylacrylamide) Solutions and Gels Using a Near Infrared Fiber Laser;Michael E. DeRosa, et al.;《Journal of Applied Polymer Science》;第105卷;第2083-2090页 * |
| 激光结构化超疏水表面的应用与研究现状;赵欣等;《激光与光电子学进展》;第59卷(第19期);第1-11页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116618267A (en) | 2023-08-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106586950B (en) | A kind of micro-nano self-assembled structures preparation method based on wetability regulation and control | |
| US20140017457A1 (en) | Method for preparing micro-patterned superhydrophobic/superhydrophilic coatings | |
| Wang et al. | Multifunctional laser‐induced graphene papers with combined defocusing and grafting processes for patternable and continuously tunable wettability from superlyophilicity to superlyophobicity | |
| Lu et al. | Low‐Density Polyethylene (LDPE) Surface With a Wettability Gradient by Tuning its Microstructures | |
| Nakamichi et al. | Fabrication of patterned and anisotropic porous films based on photo-cross-linking of poly (1, 2-butadiene) honeycomb films | |
| Zhang et al. | A rapid and efficient strategy for creating super-hydrophobic coatings on various material substrates | |
| CN112126101B (en) | Preparation method of super-smooth surface with anisotropic hydrophilicity | |
| CN107500561A (en) | High transparency, super lubrication, from glass coating of additional properties and its preparation method and application | |
| CN116618267B (en) | Photo-thermal induced phase separation-based surface hydrophilic-hydrophobic patterning construction method | |
| DE102011077023A1 (en) | Coating process and coating for a bearing component | |
| CN111760469A (en) | Preparation method of tannin and gelatin hydrophilic coating film | |
| CN104907697A (en) | Method for manufacturing titanium alloy super-hydrophobic frost-resistant surface through ultra-fast lasers | |
| Kim et al. | Corrosion protection performance of PVDF/PMMA-blended coatings by electrochemical impedance method | |
| CN114806397B (en) | Green self-repairing type super-smooth surface marine antifouling coating and preparation method thereof | |
| JPH04325446A (en) | Water-repellent oxide film and its formation | |
| CN111266277A (en) | Lubricating fluid injection type super-smooth silicone rubber/nano inorganic matter dynamic hydrophobic-oleophobic hybrid coating and construction method and application thereof | |
| CN109603208A (en) | A kind of net and preparation method thereof for water-oil separating | |
| Yabu et al. | Robust anisotropic polymer meshes prepared by stretching and photo-crosslinking of poly (1, 2-butadiene) honeycomb films | |
| CN109651818A (en) | A method of preparing the bionical superslide surface with self-healing properties | |
| Liu et al. | Wettability control of sapphire by surface texturing in combination with femtosecond laser irradiation and chemical etching | |
| CN1611305A (en) | Method for preparing super hydrophobic polymeric coating using non-crystalline polymer | |
| CN107039131A (en) | A kind of method that pulse laser prepares silicon rubber super-hydrophobic automatic cleaning surface | |
| Salam et al. | Optimisation of thermoelectric green tape characteristics made by the tape casting method | |
| CN111001929A (en) | Method for preparing LISS on surface of substrate based on alcohol-assisted femtosecond laser | |
| Sheikh et al. | Effects of Gelatin and Nano‐ZnO on the Performance and Properties of Cellulose Acetate Water Membranes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |