CN111732889A - Preparation method of organic silicon hydrophobic coating - Google Patents
Preparation method of organic silicon hydrophobic coating Download PDFInfo
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- CN111732889A CN111732889A CN201910226589.XA CN201910226589A CN111732889A CN 111732889 A CN111732889 A CN 111732889A CN 201910226589 A CN201910226589 A CN 201910226589A CN 111732889 A CN111732889 A CN 111732889A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
- C09D5/1675—Polyorganosiloxane-containing compositions
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- Chemical Kinetics & Catalysis (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
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Abstract
A process for preparing hydrophobic organosilicon coating includes proportionally mixing liquid silicon rubber (liquid raw rubber) as resin matrix and hydroxy-terminated dimethyl silicon oil as modifier, stirring while adding dipropylenetriamine as solidifying agent to obtain slurry with high flowability. The slurry is uniformly coated on the surface of the material, and a waterproof and antifouling hydrophobic surface can be formed under the crosslinking and curing of the liquid crude rubber and the hydrophobic characteristics of the silicone oil. The invention overcomes the technical problem that most organic silicon resin-based coatings are not water-resistant. The prepared hydrophobic coating with low surface energy has good water resistance and corrosion resistance, and can be combined with a surface roughening technology to prepare a super-hydrophobic material.
Description
Technical Field
The invention belongs to the field of waterproof and antifouling paint, and mainly relates to a preparation method of a silicone hydrophobic coating.
Background
The hydrophobic coating can endow the material with a hydrophobic surface, the surface has the functions of self-cleaning (antifouling), drag reduction and the like, and the hydrophobic coating has great potential application in the fields of antifouling paint, buoyancy material, water-tight sealing material and the like. The current methods for improving surface hydrophobicity can be summarized into 3 categories: one is by lowering the surface energy, i.e., using low surface energy resins such as silicone resins, fluorine-containing resins, and silicon-containing fluorine resins, etc.; secondly, the surface microstructure is changed, namely the surface roughening technology; thirdly, the bionic method is used for preparing the coating with the lotus leaf effect, and the method is a great hot point of academic research.
The organosilicon material has good moisture resistance, hydrophobicity, corrosion resistance and certain temperature resistance and low expansion, so the application progress of the product is rapidly accelerated in recent years, and the research on the performance improvement is not exhaustive. Generally, the contact angle of the coating surface prepared by the organic silicon resin is only about 100 degrees, the hydrophobic effect is not good, and the existing method for increasing the contact angle is basically to roughen the surface, so that the contact angle after treatment can be more than 150 degrees, and the coating becomes a super-hydrophobic coating. However, the surface roughening technology is complex in process and harsh in conditions, and large-area coating is difficult to realize, so that the method for realizing superhydrophobicity by using low-surface-energy resin has practical application value.
In research, coatings have been applied to the surface of self-developed fiber-based porous ceramics, which have a natural degree of roughening due to their coarse microstructure. The new low surface energy resins studied are capable of providing this rough surface with good hydrophobicization, with the ability to form superhydrophobic surfaces.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a novel preparation method of a hydrophobic coating with low surface energy, which improves the waterproof performance and self-cleaning performance of the material, selects liquid silicone rubber (liquid crude rubber) as a resin matrix, uses hydroxy-terminated dimethyl silicone oil as a modifier and uses dipropylenetriamine as a cross-linking agent, and prepares the surface coating with good hydrophobic and water-resistant performance by rapid cross-linking and curing. Wherein, the liquid silicone rubber and the dimethyl silicone oil can be polymerized and cured under the action of the cross-linking agent, and the curing speed can be regulated and controlled through the component ratio, the temperature and the dosage of the cross-linking agent.
A preparation method of a silicone hydrophobic coating comprises the following steps:
(1) accurately weighing 40 g-80 g of simethicone and 20 g-40 g of liquid crude rubber in a beaker in sequence, and mixing the raw materials according to the weight ratio of 4: 1-1: 1 by mass ratio;
(2) after uniformly mixing the solution in the step (1), slowly dripping 2-6 wt% of dipropylenetriamine while stirring; uniformly stirring by using a mechanical stirrer to obtain slurry with good fluidity;
(3) dipping the slurry obtained in the step (2) by using a common soft brush, and uniformly brushing the slurry on the surface of the fiber-based porous ceramic;
(4) and (4) quickly placing the fiber-based porous ceramic coated with the slurry in the step (3) in an oven at the temperature of 60-80 ℃ for drying for 10-30 min to obtain the organosilicon hydrophobic surface.
The preparation method of the organic silicon hydrophobic coating ensures the structural stability and good waterproof performance of the coating by utilizing the cross-linking and curing characteristic of liquid crude rubber and the hydrophobic characteristic of dimethyl silicone oil, and has extremely simple and convenient preparation process and use conditions and stronger practical application potential. And the coating with different curing speeds can be prepared by adjusting the conditions such as the content of the curing agent, the component proportion and the like according to the use requirement, namely, the coating can be used as it is after being coated and can also be stored at room temperature for a long time. Compared with the traditional organic silicon resin-based hydrophobic coating, the method is easier to combine with the surface roughening technology to obtain the surface with the contact angle of more than 150 degrees so as to prepare the super-hydrophobic material.
Drawings
FIG. 1 is an electron microscope image of the microstructure of the surface of a superhydrophobic material.
Detailed Description
For a better understanding of the present invention, the following examples are given to further illustrate the present invention, but the present invention is not limited to the examples.
Example 1:
a preparation method of a silicone hydrophobic coating comprises the following steps:
(1) accurately weighing 40g of simethicone and 40g of liquid crude rubber in a beaker in sequence according to the weight ratio of 1: 1 by mass ratio;
(2) uniformly mixing the solution obtained in the step (1), and slowly dripping 2wt% of dipropylenetriamine while stirring; uniformly stirring by using a mechanical stirrer to obtain slurry with good fluidity;
(3) dipping the slurry obtained in the step (2) by using a common soft brush, and uniformly brushing the slurry on the surface of the fiber-based porous ceramic;
(4) and (4) quickly placing the fiber-based porous ceramic coated with the slurry in the step (3) in a 60-degree oven for drying for 30min to obtain the organosilicon hydrophobic surface.
Example 2:
a preparation method of a silicone hydrophobic coating comprises the following steps:
(1) accurately weighing 80g of simethicone and 20g of liquid crude rubber in a beaker in sequence according to the weight ratio of 4: 1 by mass ratio;
(2) uniformly mixing the solution obtained in the step (1), and slowly dripping 6wt% of dipropylenetriamine while stirring; uniformly stirring by using a mechanical stirrer to obtain slurry with good fluidity;
(3) dipping the slurry obtained in the step (2) by using a common soft brush, and uniformly brushing the slurry on the surface of the fiber-based porous ceramic;
(4) and (4) quickly placing the fiber-based porous ceramic coated with the slurry in the step (3) in an oven at 80 ℃ for drying for 10min to obtain the organosilicon hydrophobic surface.
Example 3:
a preparation method of a silicone hydrophobic coating comprises the following steps:
(1) accurately weighing 60g of simethicone and 30g of liquid crude rubber in a beaker in sequence according to the weight ratio of 2: 1 by mass ratio;
(2) uniformly mixing the solution obtained in the step (1), and slowly dripping 4wt% of dipropylenetriamine while stirring; uniformly stirring by using a mechanical stirrer to obtain slurry with good fluidity;
(3) dipping the slurry obtained in the step (2) by using a common soft brush, and uniformly brushing the slurry on the surface of the fiber-based porous ceramic;
(4) and (4) quickly placing the fiber-based porous ceramic coated with the slurry in the step (3) in an oven at 70 ℃ for drying for 20min to obtain the organosilicon hydrophobic surface.
Claims (1)
1. A preparation method of an organic silicon hydrophobic coating is characterized by comprising the following steps: the preparation process comprises the following steps:
(1) accurately weighing 40 g-80 g of simethicone and 20 g-40 g of liquid crude rubber in a beaker in sequence, and mixing the raw materials according to the weight ratio of 4: 1-1: 1 by mass ratio;
(2) after uniformly mixing the solution in the step (1), slowly dripping 2-6 wt% of dipropylenetriamine while stirring; uniformly stirring by using a mechanical stirrer to obtain slurry with good fluidity;
(3) dipping the slurry obtained in the step (2) by using a common soft brush, and uniformly brushing the slurry on the surface of the fiber-based porous ceramic;
(4) and (4) quickly placing the fiber-based porous ceramic coated with the slurry in the step (3) in an oven at the temperature of 60-80 ℃ for drying for 10-30 min to obtain the organosilicon hydrophobic surface.
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| CN201910226589.XA CN111732889A (en) | 2019-03-25 | 2019-03-25 | Preparation method of organic silicon hydrophobic coating |
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| CN201910226589.XA CN111732889A (en) | 2019-03-25 | 2019-03-25 | Preparation method of organic silicon hydrophobic coating |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188783A (en) * | 1997-01-21 | 1998-07-29 | 罗汉群 | Oil repulsive anti-stick coating for cooker hood |
| CN101698778A (en) * | 2009-10-30 | 2010-04-28 | 华南理工大学 | Polysiloxane rust-proof liquid, preparation method and application thereof |
| CN101962514A (en) * | 2010-09-27 | 2011-02-02 | 复旦大学 | High-durability super-hydrophobic self-cleaning coating material and preparation method thereof |
| CN102127365A (en) * | 2011-01-26 | 2011-07-20 | 浙江交工高等级公路养护有限公司 | Hydrophobic coating capable of lowering adhesion of ice layers for asphalt pavements |
| CN104769088A (en) * | 2012-10-29 | 2015-07-08 | 伊利诺斯工具制品有限公司 | Applicator with hydrophobic coating transferableto contacting surface |
| CN105754476A (en) * | 2016-03-02 | 2016-07-13 | 全球能源互联网研究院 | Silicon rubber antifouling hydrophobic coating and preparation method thereof |
| CN108300353A (en) * | 2018-02-06 | 2018-07-20 | 东莞市纳利光学材料有限公司 | A kind of TPU protective films and preparation method thereof |
-
2019
- 2019-03-25 CN CN201910226589.XA patent/CN111732889A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188783A (en) * | 1997-01-21 | 1998-07-29 | 罗汉群 | Oil repulsive anti-stick coating for cooker hood |
| CN101698778A (en) * | 2009-10-30 | 2010-04-28 | 华南理工大学 | Polysiloxane rust-proof liquid, preparation method and application thereof |
| CN101962514A (en) * | 2010-09-27 | 2011-02-02 | 复旦大学 | High-durability super-hydrophobic self-cleaning coating material and preparation method thereof |
| CN102127365A (en) * | 2011-01-26 | 2011-07-20 | 浙江交工高等级公路养护有限公司 | Hydrophobic coating capable of lowering adhesion of ice layers for asphalt pavements |
| CN104769088A (en) * | 2012-10-29 | 2015-07-08 | 伊利诺斯工具制品有限公司 | Applicator with hydrophobic coating transferableto contacting surface |
| CN105754476A (en) * | 2016-03-02 | 2016-07-13 | 全球能源互联网研究院 | Silicon rubber antifouling hydrophobic coating and preparation method thereof |
| CN108300353A (en) * | 2018-02-06 | 2018-07-20 | 东莞市纳利光学材料有限公司 | A kind of TPU protective films and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 唐传林等: "《绝缘材料工艺原理》", 31 May 1993, 机械工业出版社 * |
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