CN110404337B - Application of bionic surface of montmorillonite/hydroxyethyl cellulose layered self-assembly material - Google Patents
Application of bionic surface of montmorillonite/hydroxyethyl cellulose layered self-assembly material Download PDFInfo
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- CN110404337B CN110404337B CN201810382077.8A CN201810382077A CN110404337B CN 110404337 B CN110404337 B CN 110404337B CN 201810382077 A CN201810382077 A CN 201810382077A CN 110404337 B CN110404337 B CN 110404337B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- 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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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- 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
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
Abstract
The invention provides an application of a bionic surface of a montmorillonite/hydroxyethyl cellulose layered self-assembly material, such as a method for screening hydrophilic microspheres and hydrophobic microsphere aggregates in the air by controlling the environment temperature to obtain enriched hydrophilic microspheres and/or enriched hydrophobic microspheres. The material has oleophobicity in water (can play a role in resisting pollution in a crude oil conveying pipeline); the material has different adhesion to particles with different properties (can be used as a microparticle primary screening material); the adhesion of the material to the microparticles is affected by the ambient temperature and humidity (can be used as a temperature-controlled microparticle control material), so that the bionic surface has strong performance and wide application range.
Description
Technical Field
The invention relates to application of a bionic surface of a montmorillonite/hydroxyethyl cellulose layered self-assembly material, belonging to the field of micron-sized materials and surface engineering.
Background
The research in the prior art finds that the self-assembled bionic surface of the shell Material has super-oleophobic property and low viscosity in water, and the Material also has high hardness, for example, the bionic Material synthesized by Guo et al (Tianqi Guo etc., Robust Underwater Oil-Material Industrial by Columnar Nacre, adv. Mater.2016.page1-6) has super-oleophobic property and low adhesion in water and has high strength. This document is hereby incorporated by reference into the present application.
Disclosure of Invention
The research of the invention finds that the self-assembled bionic surface of the shell material presents different adhesion characteristics to the hydrophilic microspheres and the hydrophobic microspheres in the air, which is reflected in that the adhesion force of the bionic surface of the shell material or the bionic material (montmorillonite/hydroxyethyl cellulose layered self-assembled bionic material) to the hydrophilic microspheres in the air is several times that of the hydrophobic microspheres.
By utilizing the characteristics, the invention can provide the application of the self-assembled bionic surface of the shell material in screening the hydrophilic microsphere and the hydrophobic microsphere aggregate in the air by controlling the environmental temperature to obtain the enriched hydrophilic microsphere and/or the enriched hydrophobic microsphere. Specifically, the invention provides a method for screening hydrophilic microspheres and hydrophobic microsphere aggregates in the air by controlling the environment temperature to obtain enriched hydrophilic microspheres and/or enriched hydrophobic microspheres, wherein the method uses a bionic surface, the bionic surface consists of the top end surfaces of a plurality of columnar bodies arranged on a substrate, the columnar bodies are made of montmorillonite/hydroxyethyl cellulose layered self-assembled bionic materials, and the top ends of the columnar structures are provided with nano protrusions;
the method comprises the following steps:
(1) preparing an aggregate of hydrophilic microspheres and hydrophobic microspheres to be screened;
(2) the aggregate is scattered and paved on the bionic surface, and then the bionic surface is fixed on a displacement controller and is downward; placing plate glass under the bionic surface;
(3) controlling a displacement controller by a program to enable the displacement controller to descend until the bionic surface is contacted with the flat glass, and then laterally and transversely pulling the displacement controller to lift the displacement controller upwards so as to separate the hydrophilic microspheres from the hydrophobic microspheres;
(4) and (4) repeating the step (3) until the number of the microspheres on the bionic surface does not change obviously any more.
The material has the characteristics of super-oleophobic property in water, high hardness, thermal stability and the like, and the newly discovered hydrophilicity and lipophilicity in air are combined, so that the bionic material has wider application and functions compared with a bionic surface made of a traditional material (PDMS), for example, the method utilizes the hydrophilicity and lipophilicity in air to screen microparticles, thereby prolonging the service life of the bionic material and widening the applicable field of the material.
The hydrophilic microsphere and the hydrophobic microsphere aggregate are mixed with each other in a pile of microspheres and are difficult to separate. Such as an assembly of substantially equal particle size and substantially equal number of hydrophilic microspheres and hydrophobic microspheres.
Compared with the aggregate to be screened, for example, the aggregate with the number ratio of 1:1 is contacted with the bionic surface in the air, and due to the difference of adhesion, the hydrophilic microspheres tend to remain on the bionic surface, while the hydrophobic microspheres are easy to fall off, so that the enriched hydrophilic microspheres with the number ratio of the hydrophilic microspheres to the hydrophobic microspheres on the bionic surface larger than 1 and the enriched hydrophobic microspheres with the number ratio of the fallen hydrophobic microspheres to the hydrophilic microspheres larger than 1 are obtained.
In some embodiments, a stage may be placed on the table top and a clean sheet of glass may be placed on the stage to face the biomimetic surface.
The invention does not specifically require the number ratio of the hydrophilic microspheres to the hydrophobic microspheres in the aggregate used in the screening method, and in the specific embodiment of the invention, in order to make the screening result more obvious, the number ratio of the hydrophilic microspheres to the hydrophobic microspheres in the aggregate used in the screening method is 1: 1.
In the method provided by the present invention, the displacement controller used is a conventional device used in the art, and the technical means for moving (such as descending, ascending, translating, etc.) the displacement controller through program control is also a conventional technical means in the art.
In some embodiments, the tip surfaces of the individual pillars arranged on the substrate have a diameter of 3 μm to 8 μm, a height of 3 μm to 10 μm, and a pitch between the pillars is 3 μm to 8 μm.
The shape of the columnar bodies arranged on the substrate in the present invention is not particularly limited, and may be generally cylindrical or semicylindrical.
The number of the columnar bodies arranged on the substrate is not limited, and can be determined according to the number of the microspheres to be screened actually, and generally speaking, if the diameter and the distance of the columnar bodies are determined, the number of the columnar bodies depends on the size of a template used; the larger the template is, the more the number of columns is; the diameter and spacing of the columns are determined by the size of the microspheres to be screened, and the diameter and spacing of the columns are required to be smaller than the diameter of the microspheres to be screened.
In some embodiments, the substrate of the present invention is made of the same material as the pillar.
Based on the actual situation, the enriched hydrophilic microspheres may be targets and may be removers, and likewise, the enriched hydrophobic microspheres may be targets and may be removers.
In some embodiments, the biomimetic surface of the present invention is formed by a plurality of montmorillonite (MMT)/Hydroxyethylcellulose (HEC) biomimetic columnar structures arranged on a substrate and having nano-protrusions (MMT/hecafical columnar Nacre) at the tips of the columnar structures. The bionic surface is shown in figure 1, and preferably, the montmorillonite/hydroxyethyl cellulose layered self-assembled bionic material is prepared by the following method:
fully suspending and mixing montmorillonite and hydroxyethyl cellulose in water, then pouring the suspended and mixed material on a silicon-etched honeycomb template, drying, and then stripping the whole dried material from the silicon-etched honeycomb template to obtain the montmorillonite/hydroxyethyl cellulose layered self-assembled bionic material.
The silicon waffle template can be obtained using means conventional in the art, for example using lithographic techniques. The obtained template is shown in fig. 2, for example.
In the method for preparing the montmorillonite/hydroxyethyl cellulose layered self-assembled bionic surface:
preferably, the concentration of the montmorillonite suspended in the water is 0.1 wt.% to 1 wt.%, e.g., 0.1 wt.%, 0.2 wt.%, 0.3 wt.%, 0.4 wt.%, 0.5 wt.%, 0.6 wt.%, 0.7 wt.%, 0.8 wt.%, 0.9 wt.%, 1 wt.%.
Preferably, the hydroxyethyl cellulose is suspended in water at a concentration of 0.1 wt.% to 1 wt.%, e.g. 0.1 wt.%, 0.2 wt.%, 0.3 wt.%, 0.4 wt.%, 0.5 wt.%, 0.6 wt.%, 0.7 wt.%, 0.8 wt.%, 0.9 wt.%, 1 wt.%. More preferably, the weight average molecular weight is 1200000-1400000 g mol-1For example 1200000 g mol-1、1 300000g mol-1、1 400 000g mol-1。
Preferably, the drying is at a temperature of 40 ℃ to 50 ℃, for example at 40 ℃ to 50 ℃. The drying is carried out for the purpose of solidifying and shaping the liquid in the viscous flow state, and the drying time can be determined according to the technical personnel in the field, and the drying time is usually 36-48 h.
Preferably, the silicon-engraved honeycomb template is a hexagonal silicon-engraved honeycomb template; more preferably, in the hexagonal silicon engraved honeycomb template, the diameter of each single column is 3 μm to 8 μm, the height is 3 μm to 10 μm, and the distance between columns is 3 μm to 8 μm.
Without conflict, the above-mentioned technical features preferred or more preferred in the method for preparing the montmorillonite/hydroxyethylcellulose layered self-assembled biomimetic material may be combined with each other to achieve better technical effects.
The invention uses hydrophilic Al2O3The microsphere and the hydrophobic PS microsphere are representatives which prove that the bionic surfaces of shell materials or bionic materials (such as montmorillonite/hydroxyethyl cellulose layered self-assembly bionic materials) of the shell materials present different adhesive forces to the two types of microspheres, so the invention can be used for screening the hydrophilic microsphere and the hydrophobic microsphere. The hydrophilic property of the invention means that the contact angle with water is less than 90 degrees, and the hydrophobic property means that the contact angle with water is more than 90 degrees. Preferably, the contact angle between the hydrophilic microspheres and water in the hydrophilic microsphere and hydrophobic microsphere aggregate is 30-70 degrees, and the contact angle between the hydrophobic microspheres and water is 100-140 degrees.
In some embodiments of the present invention, the particle size of the hydrophilic microspheres and the hydrophobic microspheres in the hydrophilic microsphere and hydrophobic microsphere assembly ranges from 10 μm to 40 μm. For example, when the diameter of the columnar bodies is 5 μm and the pitch between the columnar bodies is 5 μm, it is preferable to use microspheres having a particle size of 10 μm, and in general, when the particle size of the microspheres is 1 to 2 times the sum of the diameter and the pitch of the columnar bodies, the separation effect and the number of separation balls are preferable.
In some embodiments of the present invention, preferably, the hydrophilic microspheres include alumina microspheres and silica microspheres; the hydrophobic spheres comprise polystyrene microspheres, polyethylene microspheres, polypropylene microspheres and polyvinyl chloride microspheres.
Further research of the invention finds that the adhesive force of the bionic surface to the hydrophilic microspheres and the hydrophobic microspheres presents different trends along with the change of the air environment temperature, and for the hydrophilic microspheres, the adhesive force gradually increases along with the gradual increase of the temperature within the range of 0-27.5 ℃ and gradually decreases from about 800nN to about 400 nN; for hydrophobic beads, the adhesion increases gradually from about 75nN to about 230nN with increasing temperature over this temperature range. According to the variation of the adhesion, it is preferable that the ambient temperature of the air is 0 to 50 ℃ at the time of sieving. In this temperature range, the adhesion of the biomimetic surface to the hydrophilic microspheres is at least 2 times greater than that of the hydrophobic microspheres, and accordingly, sieving can be performed. According to the different trends of the temperature to the adhesion force of the two microspheres, the environment temperature of the air is more preferably 0 ℃ to 30 ℃, further preferably 0 ℃ to 20 ℃, more preferably 0 ℃ to 10 ℃, and most preferably 0 ℃ to 5 ℃ during screening.
In summary, the invention provides a new application of a bionic surface of a montmorillonite/hydroxyethyl cellulose layered self-assembled bionic material, which is mainly based on screening realized by different adhesive forces of the bionic surface to hydrophilic microspheres and hydrophobic microspheres. In addition, the adhesive force of the material to the microparticles is influenced by the temperature, and the material has high hardness and good application prospect.
Compared with the prior art, the invention has the advantages that the material has oleophobicity in water (can play a role in resisting pollution in a crude oil conveying pipeline); the material has different adhesion to particles with different properties (can be used as a microparticle primary screening material); the adhesion of the material to the microparticles is affected by the ambient temperature and humidity (can be used as a temperature-controlled microparticle control material), so that the bionic surface has strong performance and wide application range.
Drawings
Fig. 1 is a layered self-assembled biomimetic material prepared in example 1 of the present invention, wherein the layered self-assembled biomimetic material is composed of a plurality of montmorillonite (MMT)/hydroxyethyl cellulose (HEC) arranged on a substrate, and the top end of the columnar structure has a biomimetic surface formed by nano-protrusions (MMT/HEC artificalColumar Nacre).
Fig. 2 shows a silicon engraved honeycomb template used in example 1 of the present invention.
Fig. 3A is an SEM image of a shell showing the brick and mortar hierarchy of the shell.
Fig. 3B is an SEM image of the top of the columnar structure of the layered self-assembled montmorillonite (MMT)/Hydroxyethylcellulose (HEC) material provided in example 1 of the present invention.
Fig. 3C-3D are SEM images of the side of the pillar structure of the layered self-assembled montmorillonite (MMT)/Hydroxyethylcellulose (HEC) material provided in example 1 of the present invention.
FIGS. 4A-4C are schematic diagrams illustrating the self-cleaning exfoliation experiment results of the layered self-assembly Material of Montmorillonite (MMT)/Hydroxyethylcellulose (HEC) on alumina microspheres, provided in example 1 of the present invention; wherein, fig. 4A-4C respectively show the initial distribution state of the microspheres on the surface of the material before the experiment; the stable distribution state of the microspheres on the surface of the material after the self-cleaning experiment at 20 ℃; the microspheres are in a stable distribution state on the surface of the material after a self-cleaning experiment at 30 ℃.
FIGS. 5A-5C are schematic diagrams illustrating the self-cleaning release test results of the layered self-assembly Material of Montmorillonite (MMT)/Hydroxyethylcellulose (HEC) provided in example 1 of the present invention on Polystyrene (PS) microspheres; wherein, fig. 5A-5C respectively show the initial distribution state of the microspheres on the surface of the material before the experiment; the stable distribution state of the microspheres on the surface of the material after the self-cleaning experiment at 20 ℃; the microspheres are in a stable distribution state on the surface of the material after a self-cleaning experiment at 30 ℃.
Fig. 6A is a graph of the adhesion between a layered self-assembled Material of Montmorillonite (MMT)/Hydroxyethylcellulose (HEC) and alumina microspheres provided in example 1 of the present invention as a function of ambient temperature.
Fig. 6B is a graph of the adhesion between a layered self-assembled Material of Montmorillonite (MMT)/Hydroxyethylcellulose (HEC) and Polystyrene (PS) microspheres provided in example 1 of the present invention as a function of ambient temperature.
Detailed Description
For a more clear understanding of the technical features, objects and advantages of the present invention, reference is now made to the following detailed description of the embodiments of the present invention taken in conjunction with the accompanying drawings, which are included to illustrate and not to limit the scope of the present invention. In the examples, each raw reagent material is commercially available, and the experimental method not specifying the specific conditions is a conventional method and a conventional condition well known in the art, or a condition recommended by an instrument manufacturer.
Example 1
The embodiment provides a bionic surface of a montmorillonite/hydroxyethyl cellulose layered self-assembled bionic material and a preparation method thereof, wherein the preparation method comprises the following steps:
10mL of montmorillonite (0.5 wt.%), 10mL of hydroxyethylcellulose (0.5 wt.%; 1300000 g mol.) were added-1) Fully mixing, pouring the suspended and mixed materials on a silicon-etched honeycomb template (the diameter of a columnar structure is 5 mu m, the height of the columnar structure is 5 mu m, the space between the columnar structures is 5 mu m, and the structural schematic diagram of the template is shown in figure 2), drying in an oven at 40 ℃ for 48h, and stripping the whole dried substance from the silicon-etched honeycomb template to obtain the montmorillonite/hydroxyethyl cellulose self-assembled bionic surface (the diameter of the columnar structure is 5 mu m, the height of the columnar structure is 5 mu m, the space between the columnar structures is 5 mu m) with the structure shown in figure 1.
The function of measuring the Young modulus of the material by using AFM (atomic force microscopy) is utilized to measure the hardness of the bionic material to be 129MPa, which shows that the bionic material has very high hardness.
The contact angle of chloroform (simulated oil) and the material is 120 degrees when the contact angle measuring instrument is used for measuring the contact angle of the material in water, which indicates that the bionic surface has super-hydrophobicity in water.
SEM analysis was performed on the montmorillonite/hydroxyethylcellulose self-assembled biomimetic surface and the shell obtained in this example, wherein the SEM image of the shell is shown in fig. 3A, which shows the brick and mortar layer structure of the shell;
an SEM image of the top of the columnar structure of the layered self-assembled Material of Montmorillonite (MMT)/Hydroxyethylcellulose (HEC) is shown in FIG. 3B;
SEM images of the side surfaces of the columnar structures of the layered self-assembly Material of Montmorillonite (MMT)/hydroxyethyl cellulose (HEC) are shown in FIGS. 3C-3D.
As can be seen from fig. 3A to 3D, the layered self-assembled biomimetic Material of Montmorillonite (MMT)/Hydroxyethylcellulose (HEC) has a layered structure (brick and mortar structure) similar to a shell and a columnar structure of gecko foot-sole setae.
Example 2
This example provides a method for sieving hydrophilic microspheres and hydrophobic microsphere aggregates using the biomimetic surface prepared in example 1, the method comprising the steps of:
(1) preparing an aggregate of hydrophilic microspheres and hydrophobic microspheres to be screened; wherein the hydrophilic microspheres are Al2O3Microspheres with a size of 10 μm and a contact angle with water of 60 °; the hydrophobic microspheres are PS microspheres, the size of each PS microsphere is 10 micrometers, and the contact angle of each PS microsphere and water is 100 degrees. In the aggregate, Al2O3The microspheres are uniformly mixed with PS microspheres, and Al2O3The number ratio of microspheres to PS microspheres was 1: 1.
(2) the aggregate is scattered and paved on the bionic surface provided in the embodiment 1, and then the bionic surface is fixed on a displacement controller and is downward; placing plate glass under the bionic surface;
(3) controlling a displacement controller by a program to enable the displacement controller to descend until the bionic surface is contacted with the flat glass, and then laterally and transversely pulling the displacement controller to lift the displacement controller upwards so as to separate the hydrophilic microspheres from the hydrophobic microspheres;
(4) and (4) repeating the step (3) until the number of the microspheres on the bionic surface and the ratio of the number of the hydrophilic microspheres to the number of the lipophilic microspheres do not change obviously any more.
Screening to obtain enriched Al2O3Part of a microsphere, the partAl2O3The number ratio of microspheres to PS microspheres was 5: 2. Fraction enriched in PS microspheres, the fraction of PS microspheres being associated with Al2O3The number ratio of microspheres is 5:2
Example 3
The self-cleaning experiment of the montmorillonite/hydroxyethyl cellulose self-assembled bionic surface obtained in the embodiment 1 is carried out, and specifically, the self-cleaning experiment comprises the following steps:
dispersing and paving the alumina microspheres on the bionic surface, and then fixing the bionic surface on a displacement controller to enable the bionic surface to face downwards;
an object stage is arranged on the desktop, a piece of clean plate glass is arranged on the object stage, the displacement controller is controlled by a program to be descended until the bionic surface is contacted with the plate glass, then the displacement controller is laterally transversely pulled and then is lifted upwards. The steps are repeated (namely, the operation of the displacement controller is repeatedly controlled) until the number of the microspheres on the bionic surface does not change obviously any more.
And replacing the alumina microspheres with Polystyrene (PS) microspheres, and repeating the steps to test the self-cleaning performance of the bionic surface on the Polystyrene (PS) microspheres.
Wherein, the self-cleaning and shedding experiment result of the layered self-assembly Material of Montmorillonite (MMT)/hydroxyethyl cellulose (HEC) on alumina microspheres is schematically shown in fig. 4A-4C, and fig. 4A-4C respectively show the initial distribution state (i.e. initial state) of the microspheres on the surface of the material before the experiment; the stable distribution state of the microspheres on the surface of the material (namely stable state in the figure) after the self-cleaning experiment at 20 ℃; the microspheres are in a stable distribution state (namely stable state in the figure) on the surface of the material after a self-cleaning experiment at 30 ℃.
The self-cleaning and peeling-off test results of the layered self-assembly Material of Montmorillonite (MMT)/Hydroxyethylcellulose (HEC) on Polystyrene (PS) microspheres are schematically shown in fig. 5A-5C, and fig. 5A-5C respectively show the initial distribution state (i.e. initial state) of the microspheres on the surface of the material before the test; the stable distribution state of the microspheres on the surface of the material (namely stable state in the figure) after the self-cleaning experiment at 20 ℃; the microspheres are in a stable distribution state (namely stable state in the figure) on the surface of the material after a self-cleaning experiment at 30 ℃.
As can be seen from fig. 4A to 4C and fig. 5A to 5C, the self-cleaning performance of the biomimetic material to the alumina microspheres is enhanced with the increase of the environmental temperature; self-cleaning performance of the PS microspheres is weakened.
Example 4
The surface adhesion strength of the biomimetic material provided in example 1 with alumina microspheres and PS microspheres at different environmental temperatures was measured by AFM (operating conditions were pre-pressure 1 μ N, time 1 μ s, separation speed 500 μm/s). The graph of the adhesion between the layered self-assembly Material of Montmorillonite (MMT)/Hydroxyethylcellulose (HEC) and the alumina microspheres as a function of ambient temperature is shown in fig. 6A;
the graph of the Adhesion force (Adhesion force) between the layered self-assembled Material of Montmorillonite (MMT)/Hydroxyethylcellulose (HEC) and Polystyrene (PS) microspheres as a function of ambient Temperature (Temperature) is shown in fig. 6B.
As can be seen from fig. 6A and 6B, as the ambient temperature increases, the adhesion between the layered self-assembled Material of Montmorillonite (MMT)/Hydroxyethylcellulose (HEC) and the alumina microspheres gradually decreases, and the adhesion between the layered self-assembled Material of Montmorillonite (MMT)/Hydroxyethylcellulose (HEC) and the PS microspheres gradually increases.
Finally, it is to be noted that: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover any modifications or equivalents as may fall within the scope of the invention.
Claims (28)
1. A method for screening hydrophilic microspheres and hydrophobic microsphere aggregates in the air by controlling the ambient temperature to obtain enriched hydrophilic microspheres and/or enriched hydrophobic microspheres uses a bionic surface, the bionic surface is composed of the top end surfaces of a plurality of columnar bodies arranged on a substrate, the columnar bodies are made of montmorillonite/hydroxyethyl cellulose layered self-assembled bionic materials, and the top ends of the columnar bodies are provided with nano protrusions; the method comprises the following steps:
(1) preparing an aggregate of hydrophilic microspheres and hydrophobic microspheres to be screened;
(2) the aggregate is scattered and paved on the bionic surface, and then the bionic surface is fixed on a displacement controller and is downward; placing plate glass under the bionic surface;
(3) controlling a displacement controller by a program to enable the displacement controller to descend until the bionic surface is contacted with the flat glass, and then laterally and transversely pulling the displacement controller to lift the displacement controller upwards so as to separate the hydrophilic microspheres from the hydrophobic microspheres;
(4) and (4) repeating the step (3) until the number of the microspheres on the bionic surface does not change obviously any more.
2. The method according to claim 1, wherein the top end surfaces of the individual pillars arranged on the substrate have a diameter of 3 to 8 μm, a height of 3 to 10 μm, and a pitch between the pillars is 3 to 8 μm.
3. The method of claim 1 or 2, wherein the montmorillonite/hydroxyethyl cellulose layered self-assembled bionic material is prepared by the following method:
fully suspending and mixing montmorillonite and hydroxyethyl cellulose in water, then pouring the suspended and mixed material on a silicon-etched honeycomb template, drying, and then stripping the whole dried material from the silicon-etched honeycomb template to obtain the montmorillonite/hydroxyethyl cellulose layered self-assembled bionic material.
4. The method of claim 3, in the method for preparing the montmorillonite/hydroxyethyl cellulose layered self-assembled bionic material:
the concentration of the montmorillonite suspended in the water is 0.1 wt.% to 1 wt.%.
5. The method of claim 3, in the method for preparing the montmorillonite/hydroxyethyl cellulose layered self-assembled bionic material:
the concentration of the hydroxyethyl cellulose suspended in water is 0.1 wt.% to 1 wt.%.
6. The method of claim 5, wherein the hydroxyethylcellulose has a weight average molecular weight of 1200000 to 1400000 g mol-1。
7. The method of claim 3, wherein the drying is at 40%oC ~50oAnd C, drying under the temperature condition.
8. The method of claim 3, wherein the silicon engraved honeycomb template is a hexagonal silicon engraved honeycomb template.
9. The method of any one of claims 1-2 and 4-8, wherein the contact angle of the hydrophilic microspheres and the hydrophobic microsphere assembly with water is 30o~70oThe contact angle of the hydrophobic microspheres and water is 100o~140o。
10. The method of claim 3, wherein the contact angle of the hydrophilic microspheres and the water in the hydrophobic microsphere assembly is 30o~70oThe contact angle of the hydrophobic microspheres and water is 100o~140o。
11. The method of any one of claims 1-2, 4-8 and 10, wherein the hydrophilic microspheres and the hydrophobic microspheres in the aggregate of hydrophilic microspheres and hydrophobic microspheres have a particle size ranging from 10 μ ι η to 40 μ ι η.
12. The method of claim 3, wherein the hydrophilic microspheres and the hydrophobic microspheres in the aggregate of hydrophilic microspheres and hydrophobic microspheres have a particle size ranging from 10 μm to 40 μm.
13. The method of claim 9, wherein the hydrophilic microspheres and the hydrophobic microspheres in the aggregate of hydrophilic microspheres and hydrophobic microspheres have a particle size ranging from 10 μ ι η to 40 μ ι η.
14. The method of any one of claims 1-2, 4-8, 10, and 12-13, wherein the hydrophilic microspheres comprise alumina microspheres and silica microspheres; the hydrophobic microspheres comprise polystyrene microspheres, polyethylene microspheres, polypropylene microspheres and polyvinyl chloride microspheres.
15. The method of claim 3, wherein the hydrophilic microspheres comprise alumina microspheres and silica microspheres; the hydrophobic microspheres comprise polystyrene microspheres, polyethylene microspheres, polypropylene microspheres and polyvinyl chloride microspheres.
16. The method of claim 9, wherein the hydrophilic microspheres comprise alumina microspheres and silica microspheres; the hydrophobic microspheres comprise polystyrene microspheres, polyethylene microspheres, polypropylene microspheres and polyvinyl chloride microspheres.
17. The method of claim 11, wherein the hydrophilic microspheres comprise alumina microspheres and silica microspheres; the hydrophobic microspheres comprise polystyrene microspheres, polyethylene microspheres, polypropylene microspheres and polyvinyl chloride microspheres.
18. The method of any one of claims 1-2, 4-8, 10, 12-13, and 15-17, wherein the ambient temperature of the air during sieving is 0oC ~50oC。
19. The method of claim 3, wherein the ambient temperature of the air is 0 during the sievingoC ~50oC。
20. The method of claim 9Method, wherein the ambient temperature of the air during sieving is 0oC ~50oC。
21. The method of claim 11, wherein the ambient temperature of the air is 0 during the screeningoC ~50oC。
22. The method of claim 14, wherein the ambient temperature of the air is 0 during the screeningoC ~50oC。
23. The method of claim 18, wherein the ambient temperature of the air is 0 during the screeningoC ~30oC。
24. A method according to any one of claims 19 to 22 wherein the ambient temperature of the air at the time of sieving is 0oC ~30oC。
25. The method of claim 23, wherein the ambient temperature of the air is 0 during the screeningoC~20oC。
26. The method of claim 24, wherein the ambient temperature of the air is 0 during the screeningoC~20oC。
27. A method according to claim 25 or 26, wherein the ambient temperature of the air at the time of sieving is 0oC ~10oC。
28. The method of claim 27, wherein the ambient temperature of the air is 0 during the screeningoC~5oC。
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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 |
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| CN110404337A (en) | 2019-11-05 |
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