CN107082897A - A kind of preparation method with flexible multistage gradient body structure surface - Google Patents
A kind of preparation method with flexible multistage gradient body structure surface Download PDFInfo
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- CN107082897A CN107082897A CN201710325454.XA CN201710325454A CN107082897A CN 107082897 A CN107082897 A CN 107082897A CN 201710325454 A CN201710325454 A CN 201710325454A CN 107082897 A CN107082897 A CN 107082897A
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
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Abstract
The invention discloses a kind of preparation method with flexible multilevel hierarchy gradient surface, comprise the following steps：（1）Prepare coating liquid；（2）Prepare mask plate；（3）Prepare with flexible multistage gradient body structure surface.There is flexible multilevel hierarchy gradient surface according to prepared by preparation method of the present invention, in flexible material on the basis of buckling structure is combined, the column construction with gradient is added in flexing surface, multistage composite structure is formd.Preparing the multilevel hierarchy gradient surface with flexibility in this way, not only preparation method is simply efficient, also achieves the possibility to drop directed driven.And, can also be by realizing the change of multilevel hierarchy arranging density to stretching for substrate, so as to realize the control to drop directed driven speed due to being the multilevel hierarchy prepared using flexible VHB adhesive tapes as substrate.
Description
Technical field
The invention belongs to field of material surface modification, more particularly to a kind of system with flexible multistage gradient body structure surface
Preparation Method.
Background technology
Wetability is one of critical nature of the surface of solids, and it characterizes the infiltration degree of liquid in its surface.Wetting
Property, the glass that such as in wet weather is atomized of close concern to each other with people, super-hydrophobic lotus leaf etc., and preparing at present with specific wetting
The method on property surface has many.
Flexible multilevel body structure surface is using the material with flexible characteristic as substrate, using some way on the surface of the substrate
The multilevel hierarchy surface of formation.Wherein, multilevel hierarchy refers to that two or more structure dimensionally has larger gap,
A kind of three-D space structure that the structure of small amount level is formed on larger scale structure.For example, certain plants leaf in nature
Piece（Such as lotus leaf）And insect wing（Such as cicada, butterfly, dragonfly wing）The self-cleaning property on surface, precisely due to their surfaces are special
Micron cause solid/liquid interfaces to form air film with nano combined multilevel hierarchy, so as to cause water droplet to infiltrate and cause
's.The composite construction of multilevel size can assign material new performance.Therefore a kind of material with Multi-stage flexible structure is prepared
The work being significant in photoelectric material, coating, wellability Material Field, so how to find a kind of simple and effective
Method obtains becoming the problem of people's growing interest with Multi-stage flexible structure.
Flexible material has the characteristics of being deformed with external force.Gradient knot is erected in the surface reconstruction of flexible multilevel structure
Structure, the feature for not only making it inherit the former, is also repaired to surface, is provided with hydrophobic performance between different surfaces region
Generate the characteristics of changing in proper order.
But for now, in the market does not have a kind of simple and economic method by flexible multilevel structure and gradient-structure phase
With reference to the method for manufacture, for this present situation, we have proposed a kind of preparation side with flexible multilevel hierarchy gradient surface
Method.
The content of the invention
In order to solve the above problems, the present invention provides a kind of preparation method of the multilevel hierarchy gradient surface with flexibility,
It is a kind of simple to operate, economic and environment-friendly for being proposed the shortcomings of currently available technology preparation process is complicated, making apparatus is expensive
Method.
Adopted the following technical scheme that for this：A kind of preparation method with flexible multilevel hierarchy gradient surface, it is special
Levy and be to comprise the following steps：
Step（1）Prepare coating liquid：By the prepolymer of dimethyl silicone polymer and crosslinking agent using quality as 10:1 ratio mixing
Stir, be placed on afterwards in vacuum drying chamber and extract 20min with vavuum pump, remove the bubble in solution, poly- diformazan is made
The coating liquid of radical siloxane；
Step（2）Prepare mask plate：A length of a film 50mm, width 25mm, thickness 1mm silicon template are taken, three-dimensional drawing Software on Drawing is utilized
Go out gradient-structure layout viewing, the gradient-structure layout viewing be with a diameter of 10 μm, deep 40 μm cell orifice in template in ladder
Degree distribution, the gradient distribution mode along the long side of template to be defined, using unit pitch of holes in first 1mm distance as 10 μm,
Unit pitch of holes increases to 20 μm and so in second 1mm distance；Then using the gradient-structure layout viewing of drafting as
Reference, engraving processing is carried out to silicon template；The substrate of selection is substrate of glass, and carries out prerinse to it, i.e., by substrate of glass
10 ~ 20min of ultrasound in acetone, absolute alcohol, deionized water successively, supersonic frequency is 50 ~ 100Hz, is eluted with water afterwards simultaneously
Processing is dried；Then the silicon template handled well is fitted tightly on the glass basic surface after prerinse；By step（1）
Uniform fold is in silicon template surface by way of spin coating for the coating liquid of preparation, and the spin coating number of times of specific spin coating mode is 1 time, first
With 1500 turns per minute of speed spin coating 5s, then with 8000 turns per minute of speed spin coating 20s, finally with 1500 turns per minute
Speed spin coating 5s, afterwards has spin coating the silicon template of coating liquid using temperature as 75 DEG C of dry 20min, so that on silicon template surface
Form the film of coating liquid；
Step（3）Prepare with flexible multistage gradient body structure surface：Preparation thickness is 1mm, a width of 25mm VHB adhesive tapes, elder generation
By VHB Tape Pulls, and 50% ~ 200% dependent variable is maintained, then by step（2）Obtained mask plate spin coating has coating liquid thin
The one side of film is brought into close contact with the VHB adhesive tapes after stretching, and 2 hours are handled in temperature is 80 DEG C of baking oven；Afterwards by glass
Substrate is taken off with silicon template, and the coating liquid film for replicating silicon template gradient-structure is just brought into close contact with VHB adhesive tapes；Finally discharge
To the pulling force of VHB adhesive tapes, be close to polydimethylsiloxanefilm film on VHB tape surfaces just due to convergent force in its surface
The multilevel hierarchy that flexing is combined with gradient is produced, pre-stretching dependent variable is bigger, then the multilevel hierarchy obtained is more intensive.
There is flexible multilevel hierarchy gradient surface according to prepared by preparation method of the present invention, flexible material with
On the basis of buckling structure is combined, the column construction with gradient is added in flexing surface, multistage composite structure is formd.
The cylindrical-shaped structure formed after hole solidification in coating liquid immersion silicon template, its a diameter of 10 μm, a height of 40 μm.Cylinder is in template
On arrange in gradient, the spacing apart from inner prop and post along the long side 1mm of template is 10 μm, and in next 1mm distance
The spacing of post and post is increased to as 20 μm and so on.Prepare in this way with flexible multilevel hierarchy gradient surface not only
Preparation method is simply efficient, also achieves the possibility to drop directed driven.And due to being using flexible VHB adhesive tapes as substrate
The multilevel hierarchy of preparation, can also be by realizing the change of multilevel hierarchy arranging density, so as to reality to the stretching of substrate
Now to the control of drop directed driven speed.
The beneficial effects of the invention are as follows：1）Buckling structure is combined with column structure, the hydrophobic of material surface can be made
Property is further lifted.
2）By the adjustment to cylindrical-shaped structure arranging density, so that material surface has gradient-structure.This gradient
The region that structure can cause material surface different has different wettabilities, and the region of cylinder comparatively dense is more sparse than cylinder
Region is more hydrophilic.
3）Can be by changing the arrangement density of gradient-structure to the stretching of flexible substrates, so as to change material surface
Hydrophobicity degree, it is easier to manipulate.
4）Preparation method simple economy.
Brief description of the drawings
Fig. 1 be preparing with flexible multilevel hierarchy gradient surface in schematic diagram, figure marked as：1 is VHB adhesive tapes, and 2 are
Coating liquid film, 3 be silicon template, and 4 be substrate of glass, and 5 be the multilevel hierarchy that flexing is combined with gradient.
The electron scanning mirror figure that Fig. 2 arranges for last obtained material surface cylindrical-shaped structure.
Fig. 3 is pre-stretching dependent variable and the relation of droplet flow length.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
Referring to the drawings.A kind of preparation side with flexible multilevel hierarchy gradient surface of the present invention of embodiment 1
Method, comprises the following steps：
Step（1）Prepare coating liquid：5g dimethyl silicone polymers（PDMS）The prepolymer of coating liquid is mixed with 0.5g crosslinking agents and stirred
Mix uniform, be placed on afterwards in vacuum drying chamber and extract 20min with vavuum pump, remove the bubble in solution, poly dimethyl is made
The coating liquid of siloxanes；
Step（2）Prepare mask plate：A length of a film 50mm, wide 25mm, thickness 1mm silicon template 3 are taken, three-dimensional drawing Software on Drawing is utilized
Go out gradient-structure layout viewing, the gradient-structure layout viewing be with a diameter of 10 μm, deep 40 μm cell orifice in template in ladder
Degree distribution, the gradient distribution mode along the long side of template to be defined, using unit pitch of holes in first 1mm distance as 10 μm,
Unit pitch of holes increases to 20 μm and so in second 1mm distance；Then using the gradient-structure layout viewing of drafting as
Reference, engraving processing is carried out to silicon template；The substrate of selection is substrate of glass 4, and carries out prerinse to it, i.e., by substrate of glass
10 ~ 20min of ultrasound in acetone, absolute alcohol, deionized water successively, supersonic frequency is 50 ~ 100Hz, is eluted with water afterwards simultaneously
Processing is dried；Then the silicon template handled well is fitted tightly on the glass basic surface after prerinse；By step（1）
Uniform fold is in silicon template surface by way of spin coating for the coating liquid of preparation, and the spin coating number of times of specific spin coating mode is 1 time, first
With 1500 turns per minute of speed spin coating 5s, then with 8000 turns per minute of speed spin coating 20s, finally with 1500 turns per minute
Speed spin coating 5s, afterwards has spin coating the silicon template of coating liquid using temperature as 75 DEG C of dry 20min, so that on the surface of silicon template 3
Upper formation coating liquid film 2；
Step（3）Prepare with flexible multistage gradient body structure surface：Preparation thickness is 1mm, a width of 25mm VHB adhesive tapes 1, elder generation
By VHB Tape Pulls, and 50% ~ 200% dependent variable is maintained, then by step（2）Obtained mask plate spin coating has coating liquid thin
The one side of film 2 is brought into close contact with the VHB adhesive tapes after stretching, and 2 hours are handled in temperature is 80 DEG C of baking oven；Afterwards by glass
Substrate is taken off with silicon template, and the coating liquid film for replicating silicon template gradient-structure is just brought into close contact with VHB adhesive tapes；Finally discharge
To the pulling force of VHB adhesive tapes, be close to polydimethylsiloxanefilm film on VHB tape surfaces just due to convergent force in its surface
Produce the multilevel hierarchy 5 that flexing is combined with gradient；
Prepared by this method, which has, has buckling structure on flexible multilevel hierarchy gradient surface, material surface, and in flexing knot
The cylindrical structure with gradient is covered with structure, because used coating liquid is PDMS coating liquids, itself has hydrophobicity, drop
It is in spherical in its surface, and is gradually reduced along gradient direction contact angle.
Embodiment 2 is with the preparation method difference described in embodiment 1：Embodiment 2 include one-level flexing substrate and
Two grades of cylindrical protrusions, described two stage column shape projection presented on buckling structure surface it is radial be uniformly distributed, cylinder is high
40 μm, it is wide 10 μm, arranged in gradient in template.Cylinder is along the template long side direction 1mm spacing apart from inner prop and post
10 μm, and increased in the next 1mm spacing apart from inner prop and post as 20 μm by that analogy.This multistage composite structure can be with
Change the interface of different phase bodies, change interface energy, the hydrophobicity of increase material surface, and due to the presence of gradient-structure,
Make there is hydrophobic difference between material surface different zones.What it is due to utilization is flexible substrates VHB adhesive tapes,
The row of its surface multilevel hierarchy can be controlled by carrying out different degrees of pre-stretching to VHB adhesive tapes in the preparation
Cloth, realizes the regulation and control to material hydrophobic.When being pre-stretched the increase of VHB adhesive tapes dependent variable, the arrangement of obtained surface multilevel hierarchy
More crypto set can be become, so that its hydrophobic performance is reduced.
As shown in Figure 3.Length of flow of the drop under VHB adhesive tapes difference pre-stretching dependent variable：A, b, c are represented respectively
When VHB pre-stretching dependent variables are 50%, 100%, 200%, at same position, droplet flow length is respectively 0.9mm, 0.4mm and
0.1mm.Therefore deduce that, the dependent variable of VHB adhesive tapes pre-stretching is bigger, and drop is shorter in length of flow thereon.
Claims (1)
1. a kind of preparation method with flexible multilevel hierarchy gradient surface, it is characterised in that comprise the following steps：
Step（1）Prepare coating liquid：By the prepolymer of dimethyl silicone polymer and crosslinking agent using quality as 10:1 ratio mixing
Stir, be placed on afterwards in vacuum drying chamber and extract 20min with vavuum pump, remove the bubble in solution, poly- diformazan is made
The coating liquid of radical siloxane；
Step（2）Prepare mask plate：A length of a film 50mm, width 25mm, thickness 1mm silicon template are taken, three-dimensional drawing Software on Drawing is utilized
Go out gradient-structure layout viewing, the gradient-structure layout viewing be with a diameter of 10 μm, deep 40 μm cell orifice in template in ladder
Degree distribution, the gradient distribution mode along the long side of template to be defined, using unit pitch of holes in first 1mm distance as 10 μm,
Unit pitch of holes increases to 20 μm and so in second 1mm distance；Then using the gradient-structure layout viewing of drafting as
Reference, engraving processing is carried out to silicon template；The substrate of selection is substrate of glass, and carries out prerinse to it, i.e., by substrate of glass
10 ~ 20min of ultrasound in acetone, absolute alcohol, deionized water successively, supersonic frequency is 50 ~ 100Hz, is eluted with water afterwards simultaneously
Processing is dried；Then the silicon template handled well is fitted tightly on the glass basic surface after prerinse；By step（1）
Uniform fold is in silicon template surface by way of spin coating for the coating liquid of preparation, and the spin coating number of times of specific spin coating mode is 1 time, first
With 1500 turns per minute of speed spin coating 5s, then with 8000 turns per minute of speed spin coating 20s, finally with 1500 turns per minute
Speed spin coating 5s, afterwards has spin coating the silicon template of coating liquid using temperature as 75 DEG C of dry 20min, so that on silicon template surface
Form the film of coating liquid；
Step（3）Prepare with flexible multistage gradient body structure surface：Preparation thickness is 1mm, a width of 25mm VHB adhesive tapes, elder generation
By VHB Tape Pulls, and 50% ~ 200% dependent variable is maintained, then by step（2）Obtained mask plate spin coating has coating liquid thin
The one side of film is brought into close contact with the VHB adhesive tapes after stretching, and 2 hours are handled in temperature is 80 DEG C of baking oven；Afterwards by glass
Substrate is taken off with silicon template, and the coating liquid film for replicating silicon template gradient-structure is just brought into close contact with VHB adhesive tapes；Finally discharge
To the pulling force of VHB adhesive tapes, be close to polydimethylsiloxanefilm film on VHB tape surfaces just due to convergent force in its surface
The multilevel hierarchy that flexing is combined with gradient is produced, pre-stretching dependent variable is bigger, then the multilevel hierarchy obtained is more intensive.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104476895A (en) * | 2014-12-05 | 2015-04-01 | 天津大学 | Method for constructing multistage ordered microstructure by combination of template imprinting and surface wrinkling |
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- 2017-05-10 CN CN201710325454.XA patent/CN107082897A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104476895A (en) * | 2014-12-05 | 2015-04-01 | 天津大学 | Method for constructing multistage ordered microstructure by combination of template imprinting and surface wrinkling |
Non-Patent Citations (1)
| Title |
|---|
| JING-TANG YANG ET AL.: "Droplet Manipulation on a Hydrophobic Textured Surface With Roughened Patterns", 《JOURNAL OF MICROELECTROMECHANICAL SYSTEMS》 * |
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Application publication date: 20170822 |
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