CN110404337A - The application of montmorillonite/hydroxyethyl cellulose layering self-assembled material bionic surface - Google Patents
The application of montmorillonite/hydroxyethyl cellulose layering self-assembled material bionic surface Download PDFInfo
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- CN110404337A CN110404337A CN201810382077.8A CN201810382077A CN110404337A CN 110404337 A CN110404337 A CN 110404337A CN 201810382077 A CN201810382077 A CN 201810382077A CN 110404337 A CN110404337 A CN 110404337A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
- B01D17/0202—Separation of non-miscible liquids by ab- or adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
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Abstract
The present invention provides a kind of application of the bionic surface of montmorillonite/hydroxyethyl cellulose layering self-assembled material, Hydrophilic polymeric microspheres and method of the hydrophobic microspheres aggregate to obtain the Hydrophilic polymeric microspheres of enrichment and/or the hydrophobic microspheres of enrichment are sieved in air by controlling environment temperature as a kind of, the method uses bionic surface, the bionic surface is made of the top end surface for the multiple columns being arranged in substrate, the material of the column is that montmorillonite/hydroxyethyl cellulose is layered self assembly biomimetic material, and the column structure top has nanometer protrusion.The material has oleophobic property in water (can play functions in conveying crude oil pipeline)；Material has different adhesion strengths (can be used as the preliminary screening materials of microparticle) to particle of different nature；Material is influenced by environment temperature and humidity to the adhesion strength of microparticle and (can be used as temperature control microparticle manipulation material), thus the bionic surface powerful and use scope it is extensive.
Description
Technical field
The present invention relates to a kind of applications of montmorillonite/hydroxyethyl cellulose layering self-assembled material bionic surface, belong to
Micron order material and Surface Engineering field.
Background technique
The self assembly bionic surface of prior art research discovery shell material has superoleophobic property and lower in water
Viscosity, herein, such material also have greater hardness, such as Guo et al. (Tianqi Guo etc, Robust
Underwater Oil-Repellent Material Inspired by Columnar Nacre,
Adv.Mater.2016.page1-6 the biomimetic material synthesized by) has superoleophobic property and low adhesiveness in water, and has
There is high intensity.Here, this article is incorporated herein by reference herein.
Summary of the invention
The research of the invention finds that the self assembly bionic surface of shell material is micro- to Hydrophilic polymeric microspheres and hydrophobicity in air
Ball shows different adhesion characteristics, this be embodied in shell material or its biomimetic material (montmorillonite/hydroxyethyl cellulose layering from
Assembling biomimetic material) bionic surface hydrophobic microspheres will be several times as much as to the adhesion strength of Hydrophilic polymeric microspheres in air.
Using above-mentioned characteristic, the present invention can provide the self assembly bionic surfaces of shell material to pass through control environment in air
Temperature screening Hydrophilic polymeric microspheres obtained with hydrophobic microspheres aggregate enrichment Hydrophilic polymeric microspheres and/or enrichment hydrophobicity it is micro-
Application in ball.Hydrophilic polymeric microspheres are sieved in air and are dredged by controlling environment temperature specifically, the present invention provides one kind
Method of the aqueous microballoon aggregate to obtain the Hydrophilic polymeric microspheres of enrichment and/or the hydrophobic microspheres of enrichment, the method use
Bionic surface, the bionic surface are made of the top end surface for the multiple columns being arranged in substrate, the material of the column
Matter is that montmorillonite/hydroxyethyl cellulose is layered self assembly biomimetic material, and the column structure top has nanometer protrusion；
Described method includes following steps:
(1) aggregate of Hydrophilic polymeric microspheres and hydrophobic microspheres to be sieved is got all the ready；
(2) aggregate dispersion is taped against on the bionic surface, then the bionic surface is fixed on displacement controller
And make the bionic surface downward；Plate glass is placed in the underface of the bionic surface；
(3) make it drop to the bionic surface by process control displacement controller to be in contact with plate glass, then
Lateral horizontal drawing displacement controller is lifted up again, so that Hydrophilic polymeric microspheres are separated with hydrophobic microspheres；
(4) up to the quantity of microballoon on bionic surface, there is no significant changes for repetition step (3).
Since such material with having superoleophobic property in water, and also have many characteristics, such as big hardness, thermal stability, then
In conjunction with above-mentioned newfound aerial amphipathic property, it is imitative that this makes the biomimetic material and traditional material (PDMS)
Raw surface compared to possessing wider purposes and function, such as it is above-mentioned using its aerial amphipathic property to microparticle
Screening, had not only extended the service life of biomimetic material, but widened the material can application field.
Hydrophilic polymeric microspheres above-mentioned refer to that existing Hydrophilic polymeric microspheres have again in a pile microballoon with hydrophobic microspheres aggregate
Hydrophobic microspheres are mixed with each other, it is difficult to separate.Such as partial size substantially quite, the substantially comparable Hydrophilic polymeric microspheres of number with it is hydrophobic
The aggregate of property microballoon.
The Hydrophilic polymeric microspheres of enrichment above-mentioned are for aggregate to be sieved, such as number is than the collection for 1:1
Zoarium with the bionic surface after contacting in air, and due to the difference of adhesion strength, Hydrophilic polymeric microspheres tend to stay in imitative
On raw surface, and hydrophobic microspheres are then easy to fall off, to obtain Hydrophilic polymeric microspheres and hydrophobic microspheres on bionic surface
Number is than the enrichment Hydrophilic polymeric microspheres greater than 1, and the hydrophobic microspheres and Hydrophilic polymeric microspheres number that fall off are than the enrichment greater than 1
Hydrophobic microspheres.
In some embodiments, an objective table can be placed on the table, and one piece of cleaning is placed on objective table
Plate glass make its face bionic surface.
The present invention to the number ratios of both Hydrophilic polymeric microspheres in the aggregate used in method for sieving and hydrophobic microspheres not
Make specific requirement, in the specific embodiment of the invention, in order to keep screening result more obvious, the aggregate used in method for sieving
The number ratio of both middle Hydrophilic polymeric microspheres and hydrophobic microspheres is 1:1.
In method provided by the present invention, displacement controller used is the conventional equipment that this field uses, and is passed through
Process control makes the technological means of displacement controller movement (such as decline, rise and translate) also be this field routine techniques hand
Section.
In some embodiments, the diameter for being arranged in the top end surface of the single column in substrate is 3 μm to 8 μm,
Height is 3 μm to 10 μm, and the spacing between column is 3 μm to 8 μm.
The present invention can be not particularly limited the column shape being arranged in substrate, generally can be cylindrical or semicircle
Cylindricality.
The present invention can be not construed as limiting for being arranged in the number of column in substrate, can be according to practical microballoon to be sieved
Depending on quantity, typically, if the diameter of column and spacing determine, the number of column is dependent on the big of template used
It is small；The bigger column number of template used is more；And the diameter and spacing of column are determined by the microballoon size being sized
, it is desirable that the diameter and spacing of column obtain the diameter for being less than and being sized microballoon.
In some embodiments, the material of substrate of the present invention and the material of column are identical.
Based on actual conditions, the Hydrophilic polymeric microspheres being enriched with may be that object is also likely to be remover, and similarly, institute is rich
The hydrophobic microspheres of collection may be that object is also likely to be remover.
In some embodiments, bionic surface of the present invention be by be arranged in substrate multiple montmorillonites (MMT)/
The bionical column structure of hydroxyethyl cellulose (HEC) and the column structure top have nanometer protrusion (MMT/HEC
Artifical Columar Nacre) it is formed.The bionic surface is for example shown in Fig. 1, it is preferable that the montmorillonite/ethoxy
Cellulose layering self assembly biomimetic material is prepared as follows to obtain:
Make montmorillonite, hydroxyethyl cellulose sufficiently suspend in water to mix, the mixed material that then will suspend is cast in
Silicon is carved in honeycomb template, dry, and dried object entirety is then carved honeycomb template from the silicon and removes to obtain the montmorillonite/ethoxy
Cellulose is layered self assembly biomimetic material.
The silicon, which carves peak snap plate, can be used the acquisition of this field conventional means, obtain for example, by using plate etching technique.Institute
The template of acquisition is, for example, shown in Fig. 2.
In preparing the montmorillonite/hydroxyethyl cellulose layering self assembly bionic surface method:
Preferably, the concentration that the montmorillonite suspends in water is 0.1wt.%~1wt.%, such as 0.1wt.%,
0.2wt.%, 0.3wt.%, 0.4wt.%, 0.5wt.%, 0.6wt.%, 0.7wt.%, 0.8wt.%, 0.9wt.%,
1wt.%.
Preferably, the concentration that the hydroxyethyl cellulose suspends in water be 0.1wt.%~1wt.% for example
0.1wt.%, 0.2wt.%, 0.3wt.%, 0.4wt.%, 0.5wt.%, 0.6wt.%, 0.7wt.%, 0.8wt.%,
0.9wt.%, 1wt.%.It is highly preferred that its weight average molecular weight is 1 200 000~1 400 000g mol-1, such as 1 200
000g mol-1、1 300000g mol-1、1 400 000g mol-1。
Preferably, the drying is dry under the conditions of 40 DEG C~50 DEG C temperature, such as under the conditions of 40 DEG C, 50 DEG C of temperature
It is dry.Dry purpose is to form the liquid curing of viscous flow state, and drying time can be according to those skilled in the art
It determines, usual drying time is 36-48h.
Preferably, it is that hexagon silicon carves honeycomb template that the silicon, which carves honeycomb template,；It is highly preferred that the hexagon silicon carves bee
In snap plate, it is highly 3 μm to 10 μm that the diameter of single column, which is 3 μm to 8 μm, and the spacing between column is 3 μm to 8 μ
m。
In the absence of conflict, above-mentioned to prepare the montmorillonite/hydroxyethyl cellulose layering self assembly biomimetic material
Method in preferably or more preferably technical characteristic can be combined with each other, to realize more preferably technical effect.
The present invention is with hydrophily Al2O3Microballoon and hydrophobicity PS microballoon are that representative confirms shell material or its biomimetic material
The bionic surface of (such as montmorillonite/hydroxyethyl cellulose is layered self assembly biomimetic material) shows different glue to these two types of beads
Attached power, thus, the present invention can be used for sieving Hydrophilic polymeric microspheres and hydrophobic microspheres.Hydrophily of the present invention refers to and water
For contact angle less than 90 °, hydrophobicity, which refers to, is greater than 90 ° with the contact angle of water.Preferably, the Hydrophilic polymeric microspheres and hydrophobic microspheres
The contact angle of Hydrophilic polymeric microspheres and water is 30 °~70 ° in aggregate, and the contact angle of hydrophobic microspheres and water is 100 °~140 °.
In certain embodiments of the present invention, the Hydrophilic polymeric microspheres and Hydrophilic polymeric microspheres in hydrophobic microspheres aggregate
Particle size range with hydrophobic microspheres is 10 μm to 40 μm.For example, when the diameter of column is 5 μm, the spacing between column
When being 5 μm, use partial size preferable for 10 μm of microballoon, typically, the microspherulite diameter used for column diameter and spacing it
At 1-2 times of sum, separating effect and the quantity for separating ball are preferable.
In certain embodiments of the present invention, it is preferable that the Hydrophilic polymeric microspheres include aluminum oxide micro-sphere and titanium dioxide
Silicon microballoon；The hydrophobicity bead includes polystyrene microsphere, polyethylene microballoon, polypropylene microballoon and polyvinyl chloride microballoon.
The present invention further study show that, adherency of the bionic surface of the present invention to Hydrophilic polymeric microspheres and hydrophobic microspheres
Power shows different trend with the variation of air environment temperature, for Hydrophilic polymeric microspheres, within the scope of 0~27.5 DEG C, and adherency
Power as the temperature gradually increases, is gradually decreased from about 800nN, until 400nN or so；And it is directed to hydrophobicity bead, in the temperature
In range as the temperature rises, adhesion strength gradually rises from about 75nN, until 230nN or so.It is excellent according to the variation of the adhesion strength
Selection of land, when screening, the environment temperature of air is 0 DEG C~50 DEG C.Within this temperature range, the bionic surface is to Hydrophilic polymeric microspheres
Adhesion strength be at least the 2 times or more of hydrophobic microspheres and can be sieved accordingly.According to temperature to two kinds of microballoon adhesion strengths
Different trend, it is highly preferred that when screening, the environment temperature of air is 0 DEG C~30 DEG C, further preferred 0 DEG C~20 DEG C, more preferably
0 DEG C~10 DEG C, most preferably 0 DEG C~5 DEG C.
In summary, the present invention provides a kind of montmorillonite/hydroxyethyl cellulose layering self assembly biomimetic material is bionical
The new opplication on surface is mainly based upon the bionic surface and comes in fact to the different adhesion strengths of Hydrophilic polymeric microspheres and hydrophobic microspheres
Existing screening.In addition, being affected by temperature with adhesion strength of the material to microparticle, and such material hardness is big, have very
Good application prospect.
Compared with prior art, the invention has the advantages that material has oleophobic property in water (can be in conveying crude oil pipe
Functions are played in road)；Material there is different adhesion strengths (can be used as microparticle and tentatively sieve particle of different nature
Material)；Material is influenced (to can be used as temperature control microparticle manipulation material by environment temperature and humidity to the adhesion strength of microparticle
Material), thus the bionic surface powerful and use scope it is extensive.
Detailed description of the invention
Fig. 1 be the embodiment of the present invention 1 prepare by multiple montmorillonites (MMT)/hydroxyethyl cellulose for being arranged in substrate
(HEC) layering self assembly biomimetic material, and the column structure top has nanometer protrusion (MMT/HEC artifical
Columar Nacre) formed bionic surface.
Fig. 2 is that silicon used in the embodiment of the present invention 1 carves honeycomb template.
Fig. 3 A is that the SEM of shell schemes, and that show the bricks of shell and mortar hierarchical structure.
Fig. 3 B is montmorillonite (MMT)/hydroxyethyl cellulose (HEC) layering self assembly provided by the embodiment of the present invention 1
The SEM of material column structural top schemes.
Fig. 3 C- Fig. 3 D be the embodiment of the present invention 1 provided by the layering of montmorillonite (MMT)/hydroxyethyl cellulose (HEC) from
The SEM of assembled material column structure side schemes.
Fig. 4 A- Fig. 4 C be the embodiment of the present invention 1 provided by the layering of montmorillonite (MMT)/hydroxyethyl cellulose (HEC) from
Assembled material falls off experimental result schematic diagram to the automatically cleaning of aluminum oxide micro-sphere；Wherein, Fig. 4 A- Fig. 4 C shows material before experiment respectively
Expect the initial distribution state of surface microballoon；The Stable distritation state of microballoon on the surface of the material after automatically cleaning experiment at 20 DEG C；30℃
The Stable distritation state of microballoon on the surface of the material after lower automatically cleaning experiment.
Fig. 5 A- Fig. 5 C be the embodiment of the present invention 1 provided by the layering of montmorillonite (MMT)/hydroxyethyl cellulose (HEC) from
Assembled material falls off experimental result schematic diagram to the automatically cleaning of polystyrene (PS) microballoon；Wherein, Fig. 5 A- Fig. 5 C shows reality respectively
The initial distribution state of material surface microballoon before testing；The Stable distritation shape of microballoon on the surface of the material after automatically cleaning experiment at 20 DEG C
State；The Stable distritation state of microballoon on the surface of the material after automatically cleaning experiment at 30 DEG C.
Fig. 6 A is montmorillonite (MMT)/hydroxyethyl cellulose (HEC) layering self assembly provided by the embodiment of the present invention 1
Adhesion strength between material and aluminum oxide micro-sphere with environment temperature change curve.
Fig. 6 B is montmorillonite (MMT)/hydroxyethyl cellulose (HEC) layering self assembly provided by the embodiment of the present invention 1
Adhesion strength between material and polystyrene (PS) microballoon with environment temperature change curve.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now in conjunction with specific implementation
Example carries out technical solution of the present invention described further below, it should be understood that these examples are merely to illustrate the present invention rather than limit
The scope of the present invention processed.In embodiment, each Starting reagents material is commercially available, and test method without specific conditions is
Conventional method and normal condition known to fields, or according to condition proposed by apparatus manufacturer.
Embodiment 1
The present embodiment provides a kind of montmorillonite/hydroxyethyl cellulose layering self assembly biomimetic material bionic surfaces and its system
Preparation Method, the preparation method include the following steps:
Make 10mL montmorillonite (0.5wt.%), 10mL hydroxyethyl cellulose (0.5wt.%；1 300 000g mol-1) sufficiently
Mixing, the mixed material that then will suspend is cast in silicon quarter honeycomb template, and (column structure diameter is 5 μm, column structure height
It is 5 μm, column structure spacing is 5 μm, and the structural schematic diagram of the template is as shown in Figure 2) on, it is put into baking oven at 40 DEG C dry
Then dried object entirety is carved the removing of honeycomb template from the silicon to get the montmorillonite/hydroxyethyl cellulose self assembly by 48h
Bionic surface (column structure diameter is 5 μm, and column structure height is 5 μm, and column structure spacing is 5 μm), structure such as Fig. 1 institute
Show.
The function that young modulus of material can be surveyed using AFM, the hardness for measuring the biomimetic material is 129MPa, shows its tool
There is very high hardness.
It using contact angle measurement, measures in water, the contact angle of chloroform (simulation oil) and the material is 120 °, shows this
Bionic surface has super-hydrophobicity in water.
Sem analysis is carried out respectively to montmorillonite/hydroxyethyl cellulose self assembly bionic surface obtained by the present embodiment and shell,
Wherein, as shown in Figure 3A, that show the bricks of shell and mortar hierarchical structure for the SEM figure of shell；
The montmorillonite (MMT)/hydroxyethyl cellulose (HEC) is layered the SEM figure at the top of self-assembled material column structure such as
Shown in Fig. 3 B；
The montmorillonite (MMT)/hydroxyethyl cellulose (HEC) is layered the SEM figure of self-assembled material column structure side such as
Shown in Fig. 3 C- Fig. 3 D.
As can be seen that the layering self assembly of the montmorillonite (MMT)/hydroxyethyl cellulose (HEC) is bionical from Fig. 3 A- Fig. 3 D
Material has the column structure of hierarchy (brick and mortar structure) and gecko sole bristle similar to shell.
Embodiment 2
Present embodiments provide the bionic surface screening Hydrophilic polymeric microspheres and hydrophobic microspheres being prepared using embodiment 1
The method of aggregate, described method includes following steps:
(1) aggregate of Hydrophilic polymeric microspheres and hydrophobic microspheres to be sieved is got all the ready；Wherein, the Hydrophilic polymeric microspheres are
Al2O3Microballoon, size are 10 μm, and the contact angle with water is 60 °；The hydrophobic microspheres are PS microballoon, and size is 10 μ
M, the contact angle with water are 100 °.In the aggregate, Al2O3Microballoon is uniformly mixed with PS microballoon, and Al2O3Microballoon and PS
The number ratio of microballoon is 1:1.
(2) aggregate dispersion is taped against on the bionic surface that embodiment 1 provides, then the bionic surface is fixed on
On displacement controller and make the bionic surface downward；Plate glass is placed in the underface of the bionic surface；
(3) make it drop to the bionic surface by process control displacement controller to be in contact with plate glass, then
Lateral horizontal drawing displacement controller is lifted up again, so that Hydrophilic polymeric microspheres are separated with hydrophobic microspheres；
(4) step (3) are repeated up to both the quantity of microballoon and Hydrophilic polymeric microspheres on bionic surface and lipophilic microballoon number
There is no significant changes for the ratio between amount.
Enrichment Al is obtained by final sizing2O3The part of microballoon, part Al2O3The number ratio of microballoon and PS microballoon is
5:2.It is enriched with the part of PS microballoon, part PS microballoon and Al2O3The number ratio of microballoon is 5:2
Embodiment 3
Automatically cleaning experiment, tool are carried out to the resulting montmorillonite of above-described embodiment 1/hydroxyethyl cellulose self assembly bionic surface
For body, the automatically cleaning experiment includes the following steps:
Aluminum oxide micro-sphere dispersion is taped against on bionic surface, then on the bionic surface fix in position shift controller and will be made
The bionic surface is downward；
An objective table is placed on the table, and places one block of clean plate glass on objective table, passes through program control
Displacement controller processed makes it drop to the bionic surface and is in contact with plate glass, then lateral horizontal drawing displacement controller,
It is lifted up again.(i.e. the operation of Repetitive controller displacement controller) so is repeated, until the microballoon quantity of bionic surface is not
Until having significant change again.
The aluminum oxide micro-sphere is replaced with into polystyrene (PS) microballoon, is repeated the above steps to test the bionic surface pair
The self-cleaning performance of polystyrene (PS) microballoon.
Wherein, montmorillonite (MMT)/hydroxyethyl cellulose (HEC) layering self-assembled material is to aluminum oxide micro-sphere from clearly
For the clean experimental result schematic diagram that falls off as shown in Fig. 4 A- Fig. 4 C, Fig. 4 A- Fig. 4 C is shown respectively tests the initial of preceding material surface microballoon
Distribution (i.e. initial state in figure)；The Stable distritation state of microballoon on the surface of the material after automatically cleaning experiment at 20 DEG C
(i.e. stable state in figure)；The Stable distritation state of microballoon on the surface of the material is (i.e. in figure after automatically cleaning is tested at 30 DEG C
stable state)。
Montmorillonite (MMT)/hydroxyethyl cellulose (HEC) layering self-assembled material is to polystyrene (PS) microballoon from clearly
For the clean experimental result schematic diagram that falls off as shown in Fig. 5 A- Fig. 5 C, Fig. 5 A- Fig. 5 C is shown respectively tests the initial of preceding material surface microballoon
Distribution (i.e. initial state in figure)；The Stable distritation state of microballoon on the surface of the material after automatically cleaning experiment at 20 DEG C
(i.e. stable state in figure)；The Stable distritation state of microballoon on the surface of the material is (i.e. in figure after automatically cleaning is tested at 30 DEG C
stable state)。
It can be seen that the increase with environment temperature from Fig. 4 A- Fig. 4 C and Fig. 5 A- Fig. 5 C, biomimetic material is micro- to aluminium oxide
The self-cleaning performance of ball enhances；The self-cleaning performance of PS microballoon is weakened.
Embodiment 4
It is micro- with aluminum oxide micro-sphere and PS at different ambient temperatures that biomimetic material provided by embodiment 1 is measured using AFM
The surface adhesion size of ball (operating condition is 1 μ N of precompression, 1 μ s, 500 μm/s of separating rate when pressure).The montmorillonite
(MMT) adhesion strength between the layering self-assembled material and aluminum oxide micro-sphere of/hydroxyethyl cellulose (HEC) is with environment temperature
Change curve is as shown in Figure 6A；
Between the montmorillonite (MMT)/hydroxyethyl cellulose (HEC) layering self-assembled material and polystyrene (PS) microballoon
Adhesion strength (Adhesion force) with the change curve of environment temperature (Temperature) it is as shown in Figure 6B.
It can be seen that the increase with environment temperature, montmorillonite (MMT)/hydroxyethyl cellulose from Fig. 6 A and Fig. 6 B
(HEC) the adhesion strength between layering self-assembled material and aluminum oxide micro-sphere is gradually reduced, and its adherency between PS microballoon
Power is gradually increased.
Finally, it should be noted that above embodiments are merely to illustrate implementation process and feature of the invention, rather than limit
Technical solution of the present invention, although the present invention has been described in detail with reference to the above embodiments, the ordinary skill people of this field
Member is it is understood that it is still possible to modify or equivalently replace the present invention, without departing from the spirit and scope of the present invention
Any modification or partial replacement should all cover in protection scope of the present invention.
Claims (10)
1. one kind sieves Hydrophilic polymeric microspheres and hydrophobic microspheres aggregate in air by controlling environment temperature to be enriched with
Hydrophilic polymeric microspheres and/or enrichment hydrophobic microspheres method, the method use bionic surface, the bionic surface be by
It is arranged in the top end surface composition of multiple columns in substrate, the material of the column is montmorillonite/hydroxyethyl cellulose point
Layer self assembly biomimetic material, and the column structure top has nanometer protrusion；Described method includes following steps:
(1) aggregate of Hydrophilic polymeric microspheres and hydrophobic microspheres to be sieved is got all the ready；
(2) aggregate dispersion is taped against on the bionic surface, then the bionic surface is fixed on displacement controller and is made
The bionic surface is downward；Plate glass is placed in the underface of the bionic surface；
(3) make it drop to the bionic surface by process control displacement controller to be in contact with plate glass, it is then lateral
Horizontal drawing displacement controller is lifted up again, so that Hydrophilic polymeric microspheres are separated with hydrophobic microspheres；
(4) up to the quantity of microballoon on bionic surface, there is no significant changes for repetition step (3).
2. according to the method described in claim 1, wherein, the diameter for being arranged in the single column top end surface in substrate is 3 μ
M to 8 μm, be highly 3 μm to 10 μm, and the spacing between column is 3 μm to 8 μm.
3. method according to claim 1 or 2, wherein the montmorillonite/hydroxyethyl cellulose is layered the bionical material of self assembly
Material is prepared as follows to obtain:
Make montmorillonite, hydroxyethyl cellulose sufficiently suspend in water to mix, the mixed material that then will suspend is cast in silicon quarter
It is dry in honeycomb template, dried object entirety is then carved into honeycomb template from the silicon and removes to obtain the montmorillonite/hydroxy ethyl fiber
Element layering self assembly biomimetic material.
4. according to the method described in claim 3, preparing the montmorillonite/hydroxyethyl cellulose layering self assembly biomimetic material
Method in:
The concentration that the montmorillonite suspends in water is 0.1wt.%~1wt.%；
Preferably, the concentration that the hydroxyethyl cellulose suspends in water is 0.1wt.%~1wt.%；It is highly preferred that its is heavy
Molecular weight is 1 200 000~1 400 000g mol-1；
It is further preferred that the drying is dry under the conditions of 40 DEG C~50 DEG C temperature；
It is further preferred that it is that hexagon silicon carves honeycomb template that the silicon, which carves honeycomb template,；It is highly preferred that the hexagon silicon carves honeycomb
In template, it is highly 3 μm to 10 μm that single column diameter, which is 3 μm to 8 μm, and the spacing between column is 3 μm to 8 μm.
5. method according to any one of claims 1 to 4, wherein the Hydrophilic polymeric microspheres and hydrophobic microspheres set
The contact angle of Hydrophilic polymeric microspheres and water is 30 °~70 ° in body, and the contact angle of hydrophobic microspheres and water is 100 °~140 °.
6. method according to any one of claims 1 to 5, wherein the Hydrophilic polymeric microspheres and hydrophobic microspheres set
The particle size range of Hydrophilic polymeric microspheres and hydrophobic microspheres is 10 μm to 40 μm in body.
7. method described according to claim 1~any one of 6, wherein the Hydrophilic polymeric microspheres include aluminum oxide micro-sphere and
Silicon dioxide microsphere；The hydrophobic microspheres include that polystyrene microsphere, polyethylene microballoon, polypropylene microballoon and polyvinyl chloride are micro-
Ball.
8. method according to any one of claims 1 to 7, wherein when screening, the environment temperature of air is 0 DEG C~50
℃。
9. according to the method described in claim 8, wherein, when screening, the environment temperature of air is 0 DEG C~30 DEG C, preferably 0 DEG C~
20 DEG C, more preferable 0 DEG C~10 DEG C.
10. according to the method described in claim 9, wherein, when screening, the environment temperature of air is 0 DEG C~5 DEG C.
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| CN201810382077.8A Active CN110404337B (en) | 2018-04-26 | 2018-04-26 | Application of bionic surface of montmorillonite/hydroxyethyl cellulose layered self-assembly material |
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| JPS61274710A (en) * | 1985-05-31 | 1986-12-04 | Agency Of Ind Science & Technol | Membrane separation of liquid mixture |
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| CN103741116A (en) * | 2014-01-27 | 2014-04-23 | 吉林大学 | Diamond net and application of diamond net in separating oil-water mixture and transferring liquid drops |
| CN105505742A (en) * | 2015-12-25 | 2016-04-20 | 中国科学院深圳先进技术研究院 | Drop array chip and preparation method thereof |
| CN108315710A (en) * | 2018-02-13 | 2018-07-24 | 哈尔滨工业大学 | A kind of bionic coating for the lossless pickup transfer of trace reagent |
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| JPS61274710A (en) * | 1985-05-31 | 1986-12-04 | Agency Of Ind Science & Technol | Membrane separation of liquid mixture |
| CN102164644A (en) * | 2008-09-03 | 2011-08-24 | 康明斯过滤Ip公司 | Air-jacketed coalescer media with improved performance |
| CN103741116A (en) * | 2014-01-27 | 2014-04-23 | 吉林大学 | Diamond net and application of diamond net in separating oil-water mixture and transferring liquid drops |
| CN105505742A (en) * | 2015-12-25 | 2016-04-20 | 中国科学院深圳先进技术研究院 | Drop array chip and preparation method thereof |
| CN108315710A (en) * | 2018-02-13 | 2018-07-24 | 哈尔滨工业大学 | A kind of bionic coating for the lossless pickup transfer of trace reagent |
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