CN107130435A - A kind of synthesis of environmental protection fluorine-free hydrophobic film coating liuqid and method for sorting - Google Patents
A kind of synthesis of environmental protection fluorine-free hydrophobic film coating liuqid and method for sorting Download PDFInfo
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- CN107130435A CN107130435A CN201710423466.6A CN201710423466A CN107130435A CN 107130435 A CN107130435 A CN 107130435A CN 201710423466 A CN201710423466 A CN 201710423466A CN 107130435 A CN107130435 A CN 107130435A
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- 235000013870 dimethyl polysiloxane Nutrition 0.000 claims description 15
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 15
- 229920000742 Cotton Polymers 0.000 claims description 14
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 claims description 14
- 238000004987 plasma desorption mass spectroscopy Methods 0.000 claims description 14
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- 238000005470 impregnation Methods 0.000 claims description 6
- 238000010907 mechanical stirring Methods 0.000 claims description 5
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- 244000025254 Cannabis sativa Species 0.000 claims description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 2
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
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- 235000009120 camo Nutrition 0.000 claims description 2
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- 239000011487 hemp Substances 0.000 claims description 2
- 238000003760 magnetic stirring Methods 0.000 claims description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
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- 239000004814 polyurethane Substances 0.000 claims description 2
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- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 239000004759 spandex Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
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- 210000002268 wool Anatomy 0.000 claims description 2
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- 229920006052 Chinlon® Polymers 0.000 claims 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims 1
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- 238000001878 scanning electron micrograph Methods 0.000 description 7
- 239000002253 acid Substances 0.000 description 5
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- 238000001228 spectrum Methods 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 3
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
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- 239000000126 substance Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
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- 239000002585 base Substances 0.000 description 1
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- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/10—Repellency against liquids
- D06M2200/12—Hydrophobic properties
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a kind of synthesis of environmental protection fluorine-free hydrophobic film coating liuqid and method for sorting, stable hydrophobic film coating liuqid emulsion is first prepared；Transparent hydrophobic finishing effect can be realized in substrate surface using infusion process.Not only technique is simple for this method, energy cost, low raw-material cost, environmental protection, and can be applied to various material substrates, products obtained therefrom have good anti-wear performance, it is resistance to soap, acidproof alkali salt, may be directly applied to large-scale industrial production and marketing.
Description
Technical Field
The invention relates to a method for synthesizing and finishing an environment-friendly fluorine-free hydrophobic coating liquid.
Background
The hydrophobic phenomenon has been noticed and studied as a common wetting phenomenon, and young's equation about interfacial tension and wetting property was proposed in tomas-young as early as 1805. The discovery of the lotus leaf effect in 1997 then led to a new era in the research of superhydrophobic surfaces. By superhydrophobic surface is meant a surface where the contact angle of a drop of water with the interface is greater than 150 ° and the rolling angle is less than 10 °. At present, the preparation of a superhydrophobic surface mainly comprises the following steps: (1) a micro-nano rough structure (2) is constructed on the surface, and a low surface energy substance is modified on the surface. How to construct the micro-nano rough structure of the surface is the key point of constructing the super-hydrophobic surface. The simplest method of rough structure construction is reported to incorporate nanoparticles and fix them to a substrate using various adhesives. However, the surface nano particles of the super-hydrophobic substrate constructed in the way are easy to fall off, and influence on human health is generated. In addition, the commonly used construction methods include hydrothermal method, electrostatic spinning method, plasma etching method, laser femtosecond etching method, however, these methods either require complicated process or expensive instrument, and are difficult to apply to large-scale industrial production. Therefore, how to construct a super-hydrophobic surface under a low-cost water-rich system by using an adhesive only is an important problem, so that the super-hydrophobic surface has the performances of friction resistance, soaping resistance and acid and alkali resistance, and is suitable for large-scale industrial production.
Disclosure of Invention
The invention aims to provide a method for synthesizing and finishing an environment-friendly fluorine-free hydrophobic coating liquid, which adopts a water-rich system dipping finishing method to solve the problems.
The technical scheme of the invention is as follows:
a method for synthesizing and finishing an environment-friendly fluorine-free hydrophobic coating liquid comprises the following steps:
(1) preparing coating finishing emulsion: dissolving a high polymer in a good solvent, magnetically stirring to uniformly disperse the high polymer to prepare a dispersion system, and dropwise adding water into the dispersion system under the condition of ultrasonic oscillation or mechanical stirring to prepare a hydrophobic coating liquid emulsion;
(2) preparing a super-hydrophobic substrate by an impregnation method: and soaking the substrate in the hydrophobic coating liquid emulsion, taking out and drying to obtain the super-hydrophobic substrate.
Further, the volume ratio of the good solvent to the water in the step (1) is 1:9 to 9: 1.
further, in the step (1), the polymer is any one of PMMA or PDMS, and the good solvent is THF.
Further, the magnetic stirring time in the step (1) is 30min, and the ultrasonic oscillation or mechanical stirring time is 5-60 min.
Further, the soaking time in the step (2) is 5-120 min.
Further, in the step (2), the substrate is any one of fabric, ready-made clothes, sponge or filter screen.
Further, the fabric is any one of woven fabric, non-woven fabric, knitted fabric or inorganic material fabric of natural or artificial fiber.
Further, the natural or artificial fiber fabric is any one of cotton, hemp, silk, wool, terylene, polypropylene fiber, polyamide fiber, spandex, acrylic fiber or viscose, and the inorganic material fabric is any one of glass fiber, carbon fiber or asbestos fiber.
Further, the sponge is any one of polyurethane sponge or melamine sponge.
Further, the filter screen is any one of a copper mesh or a stainless steel mesh.
The invention has the advantages that:
(1) a water-rich system is adopted to prepare the hydrophobic coating liquid, and the coating liquid system is stable. The raw materials required by production are low in cost, the process and equipment are extremely simple, and meanwhile, the product has excellent wear resistance, soaping resistance and acid and alkali resistance, and can be directly applied to large-scale industrial production and market popularization;
(2) the method can construct super-hydrophobic surfaces on various substrates, has wide raw material applicability, almost has no influence on the color of the substrate, and can be applied to different purposes;
(3) the porous substrate treated by the method can obtain good hydrophobic and oil-water separation performance, and can be widely applied to the fields of resource recovery and environmental purification.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein,
FIG. 1 is an EDS energy spectrum and element distribution of an environment-friendly fluorine-free hydrophobic coating liquid finished fabric substrate according to the present invention;
FIG. 2 shows the appearance and contact angle of a superhydrophobic substrate prepared by finishing the environment-friendly fluorine-free hydrophobic coating solution according to the present invention;
FIG. 3 is an XPS spectrum of a super-hydrophobic substrate prepared by finishing the environment-friendly fluorine-free hydrophobic coating liquid of the present invention at each stage;
FIG. 4 is an SEM image of a rough structured surface of a prepared superhydrophobic substrate according to an embodiment of the finishing method of an environmentally-friendly fluorine-free hydrophobic coating liquid of the invention;
FIG. 5 is an SEM image of a rough structured surface of a superhydrophobic substrate prepared by a second method for finishing an environmentally-friendly fluorine-free hydrophobic coating solution according to the present invention;
FIG. 6 is an SEM image of a rough structured surface of a superhydrophobic substrate prepared by a third method of finishing an environmentally-friendly fluorine-free hydrophobic coating solution according to the invention;
FIG. 7 is a contact angle diagram of the surface of a superhydrophobic substrate fabric prepared by the environment-friendly fluorine-free hydrophobic coating liquid finishing method of the invention after being rubbed for 400 times from the outside;
FIG. 8 is a contact angle diagram of the surface of a superhydrophobic substrate fabric prepared by the environment-friendly fluorine-free hydrophobic coating liquid finishing method of the invention being soaped 5 times respectively;
FIG. 9 is a contact angle diagram of the superhydrophobic substrate fabric surface prepared by the environment-friendly fluorine-free hydrophobic coating liquid finishing method of the invention after being soaked in acid, alkali and salt for 24 hours respectively.
Detailed Description
The invention provides a method for synthesizing and finishing an environment-friendly fluorine-free hydrophobic coating liquid, which comprises the following steps:
a method for synthesizing and finishing an environment-friendly fluorine-free hydrophobic coating liquid comprises the following steps:
(1) preparing a hydrophobic coating liquid emulsion;
(2) and preparing the super-hydrophobic substrate by an immersion method.
The present invention will be described in further detail with reference to specific embodiments in order to make the above objects, features and advantages more apparent and understandable.
A method for synthesizing and finishing an environment-friendly fluorine-free hydrophobic coating liquid comprises the following steps:
the method comprises the following steps: preparing a hydrophobic coating liquid emulsion: dissolving a high polymer in a good solvent, magnetically stirring to uniformly disperse the high polymer to prepare a dispersion system, and dropwise adding water into the dispersion system under the condition of ultrasonic oscillation or mechanical stirring to prepare a hydrophobic coating liquid emulsion;
in one embodiment, this step may be specifically performed as follows: dissolving 1-5g of PDMS in 10-90ml of THF, magnetically stirring for 30 minutes to uniformly disperse the PDMS, dripping 10-90ml of PDMS into the solution under ultrasonic vibration, and continuing the ultrasonic vibration for 5-60 minutes to obtain a stable hydrophobic coating liquid emulsion, wherein THF can be replaced by other solvents which can be dissolved in PDMS or PMMA and can also be dissolved in water, such as: ethyl acetate, acetone, N-N dimethylformamide;
step two: preparing a super-hydrophobic substrate by an impregnation method: soaking a substrate in the hydrophobic coating liquid emulsion, taking out and drying to obtain a super-hydrophobic substrate;
in one embodiment, this step may be specifically performed as follows: and soaking various substrates in the finishing agent for 5-120min, taking out, and drying in an oven to obtain the super-hydrophobic substrate.
The performance of the superhydrophobic substrate obtained in the above steps is shown in fig. 1-3, and is shown in fig. 1, and fig. 1 is an element distribution and EDS energy spectrum of an environment-friendly fluorine-free hydrophobic coating liquid finished fabric substrate according to the present invention. As shown in figure 1, EDS energy spectrum on the surface of the prepared micro-nano structure PDMS cotton fabric and distribution of element Si can prove that high polymers are attached to the surface of the modified cotton fabric and are distributed uniformly.
Referring to fig. 2, fig. 2 shows the shape and contact angle of a super-hydrophobic substrate prepared by finishing the environment-friendly fluorine-free hydrophobic coating liquid according to the present invention. As shown in figure 2, the surface is irregular and rough after being finished by the method, and the super-hydrophobic surface is obtained, and the contact angle is more than 150 degrees.
Referring to fig. 3, fig. 3 is an XPS spectrum of a superhydrophobic substrate prepared after finishing by an environment-friendly fluorine-free hydrophobic coating solution according to the present invention at each stage. As shown in FIG. 3, the fabric surface finished by the method has obvious Si signals, which indicates that the superhydrophobic surface is successfully prepared.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are further described below. The invention is not limited to the embodiments listed but also comprises any other known variations within the scope of the invention as claimed.
First, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The present invention is described in detail by using the schematic structural diagrams, etc., and for convenience of illustration, the schematic diagrams are not enlarged partially according to the general scale when describing the embodiments of the present invention, and the schematic diagrams are only examples, which should not limit the scope of the present invention. In addition, the actual fabrication process should include three-dimensional space of length, width and depth.
In addition, the acronyms referred to in the invention are all fixed acronyms in the field, wherein part of the letters are explained as follows: PMMA: polymethyl methacrylate; PDMS: polydimethylsiloxane; THF: tetrahydrofuran; SEM image: electronic scanning and image display; EDS diagram: an energy spectrum; XPS spectrum: and (3) analyzing a spectrogram by X-ray photoelectron spectroscopy.
Example one
The embodiment shows that the super-hydrophobic substrate is prepared by the synthesis and finishing method of the environment-friendly fluorine-free hydrophobic coating liquid according to the following steps:
the method comprises the following steps: preparing hydrophobic coating liquid emulsion
Dissolving 1g of PDMS in 30ml of THF, magnetically stirring for 30 minutes to uniformly disperse the PDMS, dripping 70ml of water into the solution under ultrasonic vibration, and continuing the ultrasonic vibration for 30 minutes to prepare the stable hydrophobic coating liquid emulsion.
Step two: impregnation method for preparing super-hydrophobic substrate
And soaking the cotton fabric in the hydrophobic coating liquid emulsion for 30 minutes, taking out the cotton fabric, and drying the cotton fabric in an oven to obtain the super-hydrophobic cotton fabric.
Please refer to fig. 4 for a morphology structure of a superhydrophobic cotton fabric (superhydrophobic substrate) prepared in this embodiment, fig. 4 is an SEM image of a rough structure surface of the superhydrophobic substrate prepared in an embodiment of the finishing method of the environmentally-friendly fluorine-free hydrophobic coating liquid according to the present invention.
Example two
The embodiment shows that the environment-friendly fluorine-free hydrophobic coating liquid and the synthesis and finishing method are used for preparing the super-hydrophobic substrate according to the following steps:
the method comprises the following steps: preparing hydrophobic coating liquid emulsion
Dissolving 1g of PDMS in 10ml of THF, magnetically stirring for 30 minutes to uniformly disperse the PDMS, dripping 90ml of water into the solution under ultrasonic vibration, and continuing the ultrasonic vibration for 30 minutes to prepare stable hydrophobic coating liquid emulsion;
step two: impregnation method for preparing super-hydrophobic substrate
And soaking the cotton fabric in the hydrophobic coating liquid emulsion for 60 minutes, taking out the cotton fabric, and drying the cotton fabric in an oven to obtain the super-hydrophobic cotton fabric.
Please refer to fig. 5, wherein fig. 5 is an SEM image of a rough structure surface of a superhydrophobic substrate prepared in the second embodiment of the finishing method of an environmentally friendly fluorine-free hydrophobic coating solution according to the present invention.
EXAMPLE III
The embodiment shows that the super-hydrophobic substrate is prepared by the synthesis and finishing method of the environment-friendly fluorine-free hydrophobic coating liquid according to the following steps:
the method comprises the following steps: preparing hydrophobic coating liquid emulsion
Dissolving 1g of PDMS in 30ml of THF, magnetically stirring for 30 minutes to uniformly disperse the PDMS, dripping 70ml of water into the solution under ultrasonic vibration, and continuing the ultrasonic vibration for 30 minutes to prepare a stable hydrophobic coating liquid emulsion;
step two: impregnation method for preparing super-hydrophobic substrate
And soaking the color garment in the hydrophobic coating liquid emulsion for 30 minutes, taking out the color garment and drying the color garment in an oven to obtain the super-hydrophobic color fabric.
Please refer to fig. 6, wherein fig. 6 is an SEM image of a rough structure surface of a superhydrophobic substrate prepared according to a third embodiment of the finishing method of an environmentally friendly fluorine-free hydrophobic coating solution of the present invention.
In the above three embodiments, the fabric surface constructed by the environmental-friendly fluorine-free hydrophobic coating liquid finishing method has lasting hydrophobicity under the action of external friction, please refer to fig. 7, and fig. 7 is a contact angle diagram of the superhydrophobic substrate fabric surface prepared by the environmental-friendly fluorine-free hydrophobic coating liquid finishing method of the present invention after being subjected to external friction for 400 times. As shown in FIG. 7, the contact angle between the surface of the special-wettability ultraviolet-resistant fabric prepared by cotton cloth rubbing and water after 400 times of circulation is over 150 degrees, so that good hydrophobicity is maintained.
Please refer to fig. 8, in which fig. 8 is a contact angle diagram of 5 times of soaping of the surface of the superhydrophobic substrate fabric prepared by the environmentally-friendly fluorine-free hydrophobic coating liquid finishing method according to the present invention. As shown in fig. 8, the fabric surface was water washed according to AATCC standard 2A method, and after 5 times of increasing the trend of the contact angle of the fabric surface with water, the sample maintained good hydrophobicity after five times of increasing the water.
The fabric surface constructed by the environment-friendly fluorine-free super-hydrophobic finishing method has acid and alkali resistance, please refer to fig. 9, and fig. 9 is a contact angle diagram of the super-hydrophobic substrate fabric surface prepared by the environment-friendly fluorine-free hydrophobic coating liquid finishing method of the present invention after being soaked in acid, alkali and salt for 24 hours, wherein the pH =1 of hydrochloric acid, the pH =14 of sodium hydroxide, and the pH =7 of sodium chloride. As can be seen from FIG. 9, the super-hydrophobic performance obtained by the fabric finished by the method has good retention capacity under the extreme acid-base environment.
In addition, the super-hydrophobic coating finishing liquid prepared by the environment-friendly fluorine-free super-hydrophobic finishing method has stability and is suitable for long-time storage; the fabric surface constructed by the environment-friendly fluorine-free super-hydrophobic finishing method also has oil-water separation performance, if the prepared functional fabric surface is fixed between two glass tubes, a mixed solution of water and oil with the volume ratio of 1:1 is poured from the glass tube with an opening at the upper end, the oil flows into a cone-shaped bottle collector below through the fabric after a while, and the blue-dyed aqueous solution is left in the glass tube above.
In conclusion, the invention discloses a synthesis and finishing method of an environment-friendly fluorine-free hydrophobic coating liquid, which comprises the steps of firstly preparing a water-rich system super-hydrophobic finishing liquid, and then finishing an emulsion on a substrate by adopting a dipping method. In addition, the fabric surface constructed by the method has very stable hydrophobic property, excellent mechanical property and chemical stability, and is expected to be applied to the fields of outdoor clothing, industrial waterproofing, resource recovery and the like.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A method for synthesizing and finishing an environment-friendly fluorine-free hydrophobic coating liquid is characterized by comprising the following steps:
(1) preparing a hydrophobic coating liquid emulsion: dissolving a high polymer in a good solvent, magnetically stirring to uniformly disperse the high polymer to prepare a dispersion system, and dropwise adding water into the dispersion system under the condition of ultrasonic oscillation or mechanical stirring to prepare a hydrophobic coating liquid emulsion;
(2) preparing a super-hydrophobic substrate by an impregnation method: and soaking the substrate in the hydrophobic coating liquid emulsion, taking out and drying to obtain the super-hydrophobic substrate.
2. The method for synthesizing the environment-friendly fluorine-free hydrophobic coating liquid according to claim 1, wherein the method comprises the following steps: the volume ratio of the good solvent to the water in the step (1) is 1:9 to 9: 1.
3. the method for synthesizing the environment-friendly fluorine-free hydrophobic coating liquid according to claim 1, wherein the method comprises the following steps: in the step (1), the high polymer is any one of PMMA or PDMS, and the good solvent is THF.
4. The method for synthesizing the environment-friendly fluorine-free hydrophobic coating liquid according to claim 1, wherein the method comprises the following steps: the magnetic stirring time in the step (1) is 30min, and the ultrasonic oscillation or mechanical stirring time is 5-60 min.
5. The environmentally friendly fluorine-free superhydrophobic finishing method according to claim 1, characterized in that: the soaking time in the step (2) is 5-120 min.
6. The environmentally friendly fluorine-free superhydrophobic finishing method according to claim 1, characterized in that: in the step (2), the substrate is any one of fabric, ready-made clothes, sponge or filter screen.
7. The environmentally friendly fluorine-free superhydrophobic finishing method according to claim 6, characterized in that: the fabric is any one of natural or artificial fiber woven fabric, non-woven fabric, knitted fabric or inorganic material fabric.
8. The environment-friendly fluorine-free super-hydrophobic finishing method of claim 7, characterized in that the natural or artificial fiber fabric is any one of cotton, hemp, silk, wool, terylene, polypropylene, chinlon, spandex, acrylic or viscose, and the inorganic material fabric is any one of glass fiber, carbon fiber or asbestos fiber.
9. The environment-friendly fluorine-free super-hydrophobic finishing method according to claim 6, characterized in that the sponge is any one of polyurethane sponge or melamine sponge.
10. The environment-friendly fluorine-free super-hydrophobic finishing method according to claim 6, wherein the filter screen is any one of a copper mesh or a stainless steel mesh.
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