Composition and method for preparing super-smooth coating
By mixing components such as polymer network lock oil and silicone oil in the polymer network to form a stable ultra-slip coating, the problem of difficulty in preparing ultra-slip coatings suitable for complex-shaped surfaces in the prior art is solved, and efficient sliding performance and anti-adhesion effect are achieved.
Patent Information
- Application Number
- CN202510146648.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2025-04-18
AI Technical Summary
The prior art is difficult to prepare ultraslip coatings suitable for complex shaped surfaces such as inner walls of pipes, and the preparation process of polymer network lock oil is complicated and prone to swelling.
The composition is made of a catalyst including 40 to 90 parts by weight of component A and 10 to 50 parts by weight of component B and 5 to 30 parts by weight of component A. Component A is selected from polymethylsiloxane, polyethylsiloxane, epoxysiloxane or hydrogel network raw materials, component B is selected from silicone oil, perfluoro liquid, vegetable oil or mineral oil, and the catalyst is selected from metal catalysts, acid-base catalysts or heterogeneous catalysts. By mixing component A and component B in the polymer network uniformly, a polymer network is formed and locked with the oil of component B to avoid swelling.
The prepared super-sliding coating not only has very small sliding angles, but also resists adhesion, reduces bacterial deposition, reduces the occurrence of clogging, simplifies the preparation process, and is suitable for complex-shaped surfaces such as the inner walls of pipes.
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Figure CN119842316A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of material coating preparation, and in particular to a composition and method for preparing an ultra-slip coating. Background Art
[0002] Super-slip surfaces are widely used in antibacterial, anti-protein adhesion, anti-blood adhesion, biomedical engineering and other fields. Because there is a stable and continuous lubricant layer on its surface, many substances have low sliding resistance on its surface and are difficult to infiltrate and adhere to the surface, which gives it good sliding properties and unique advantages in fluid environments.
[0003] Compared with porous structure oil lock, polymer network oil lock has better oil adaptability and durability. However, its preparation process is complicated, swelling phenomenon occurs, making it difficult to use as a coating, and it is difficult to apply to complex shaped surfaces, such as the inner wall of a pipe. Summary of the invention
[0004] The object of the present invention is to provide a composition and a method for preparing an ultra-slip coating.
[0005] The present invention solves the technical problem by adopting the following technical solutions:
[0006] In a first aspect of the present invention, there is provided a composition for preparing an ultra-slip coating, the composition comprising:
[0007] 40-90 parts by weight of component A, 10-50 parts by weight of component B, and 5-30 parts by weight of a catalyst;
[0008] The component A is selected from at least one of polymethylsiloxane, polyethylsiloxane, epoxysiloxane, and hydrogel network raw materials;
[0009] The component B is selected from at least one of silicone oil, perfluorinated liquid, vegetable oil, and mineral oil;
[0010] The catalyst is selected from at least one of a metal catalyst, an acid-base catalyst, and a heterogeneous catalyst.
[0011] The metal catalyst may be selected from Pt catalysts.
[0012] Acidic catalysts mainly include liquid acids, acidic complexes, aluminosilicates, acidic oxides, etc.
[0013] Alkaline catalysts mainly include liquid alkali, alkaline earth metal oxides and the like.
[0014] Heterogeneous catalysts mainly include biological enzymes, molecular sieves, etc.
[0015] In some embodiments of the present invention, the composition comprises: 60 to 80 parts by weight of component A, 20 to 40 parts by weight of component B, and 10 to 15 parts by weight of a catalyst;
[0016] In some embodiments of the present invention, the component A is selected from polymethylsiloxane, and the component B is selected from silicone oil.
[0017] In some embodiments of the present invention, the polymethylsiloxane is selected from polydimethylsiloxane.
[0018] In some embodiments of the present invention, the component A is selected from hydrogel network raw materials, and the component B is selected from silicone oil.
[0019] The ultra-slippery coating prepared from hydrogel network raw materials has a more stable network and better biocompatibility, and is suitable for commonly used biomedical materials such as PVC, PTFE, PU, etc.
[0020] In some embodiments of the present invention, the hydrogel network raw materials include sodium alginate and polydiallyldimethylammonium chloride, and the weight ratio of the sodium alginate to the polydiallyldimethylammonium chloride is 1 to (0.8 to 1.2).
[0021] In some embodiments of the present invention, the viscosity of the silicone oil is 5 to 10000 cSt.
[0022] In a second aspect, the present invention provides a method for preparing an ultra-slip coating, comprising: pre-treating a substrate and then coating the surface with the composition according to any one of claims 1 to 7 to prepare the ultra-slip coating.
[0023] After the surface is coated with the above composition, a super-slip coating is formed by appropriate means, including but not limited to heating, standing at room temperature, immersing in a CaCl2 aqueous solution, etc.
[0024] In some embodiments of the present invention, the preparation method comprises:
[0025] Step 1: pre-treating the substrate;
[0026] Step 2: Spreading silane coupling agent on the surface of the substrate;
[0027] Step 3: Spread the above composition on the surface to prepare the super-slip coating.
[0028] In some embodiments of the present invention, the preparation method comprises:
[0029] Step 1: pre-treating the substrate;
[0030] Step 2: Spread the above composition on the surface and immerse it in a CaCl2 aqueous solution to prepare a super-slip coating.
[0031] The present invention includes the following beneficial effects:
[0032] When the composition of the present invention is used to prepare a super-slip coating, component A is mixed evenly to form a polymer network, and then the polymer network is polymerized to lock the oil of component B, so that swelling will not occur.
[0033] The super-slip coating prepared by the present invention not only has a very small sliding angle, but also has the function of resisting adhesion, reducing the deposition of bacteria, reducing the occurrence of blockage, and simplifying the preparation process. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 4 is a contact angle bar graph of various embodiments of the present invention.
[0035] Figure 2 It is a sliding angle bar graph of various embodiments of the present invention.
[0036] Figure 3 This is a micrograph of the inner coating of the pipe of Example 2.
[0037] Figure 4 This is a diagram showing the effect of anti-bile adhesion of Example 2.
[0038] Figure 5 The diagrams are the antibacterial effects of various embodiments on Escherichia coli.
[0039] Figure 6 The graphs are the results of the bile circulation experiments in various embodiments. DETAILED DESCRIPTION
[0040] The present invention specification describes the specific implementation scheme in detail. Those skilled in the art should recognize that the following implementation scheme is exemplary and cannot be understood as limiting the present invention. For those skilled in the art, without departing from the principle of the present invention, by making several improvements and modifications to the present invention, the technical solutions obtained by these improvements and modifications also fall within the protection scope of the claims of the present invention. The following examples specifically illustrate the beneficial effects of the present invention.
[0041] Example 1
[0042] A method for preparing an ultra-slip coating on a substrate surface comprises the following steps:
[0043] Step 1: Plasma treatment of the substrate for ten minutes;
[0044] Step 2: evenly apply a layer of silane coupling agent on the surface of the substrate, with a coating thickness of 10-20 μm and an amount of about 1-2 g;
[0045] Step 3: Add 1 g of catalyst to 10 g of polydimethylsiloxane liquid, stir evenly and degas to obtain solution A. Spread solution A evenly on the surface of the substrate, heat at 80° C. for 12 hours to crosslink and cure to obtain a coating.
[0046] Example 2
[0047] A method for preparing an ultra-slip coating on a substrate surface comprises the following steps:
[0048] Step 1: Plasma treat the substrate (pipe substrate or flat glass) for ten minutes;
[0049] Step 2: evenly apply a layer of silane coupling agent on the surface of the substrate, with a coating thickness of 10-20 μm and an amount of about 1-2 g;
[0050] Step 3: Take 6g of 1000cSt silicone oil and add it to 4g of polydimethylsiloxane liquid, then add 1g of catalyst, stir evenly and degas to obtain solution B. Spread solution B evenly on the surface of the substrate, heat at 80°C for 12 hours to crosslink and cure to obtain an ultra-slip coating.
[0051] The components of this embodiment are simple and are mainly used for lubrication, antibacterial and anti-biological adhesion of biomedical pipelines.
[0052] Example 3
[0053] A method for preparing an ultra-slip coating on a substrate surface comprises the following steps:
[0054] Step 1: Plasma treat the substrate (pipe substrate or flat glass) for ten minutes;
[0055] Step 2: Take 2 g of PDDA (1.0 mg / mL) aqueous solution and 2 g of sodium alginate aqueous solution (0.40 wt%), stir evenly to obtain solution C, spread solution C evenly on the surface of the substrate, and then gel in a CaCl2 aqueous solution (0.1 M) for 10 min to obtain a coating.
[0056] Example 4
[0057] A method for preparing an ultra-slip coating on a substrate surface comprises the following steps:
[0058] Step 1: Plasma treat the substrate (pipe substrate or flat glass) for ten minutes;
[0059] Step 2: Take 6 g of 1000 cSt silicone oil, add 2 g of PDDA (1.0 mg / mL) aqueous solution and 2 g of sodium alginate aqueous solution (0.40 wt%), stir evenly to obtain a solution, spread the liquid evenly on the surface of the substrate, and then gel in a CaCl2 aqueous solution (0.1 M) for 10 min to obtain an ultra-slippery coating.
[0060] Example 5
[0061] A method for preparing an ultra-slip coating on a substrate surface comprises the following steps:
[0062] Step 1: Plasma treat the substrate (pipe substrate or flat glass) for ten minutes;
[0063] Step 2: Take 8g of 1000cSt silicone oil, add 1g of PDDA (1.0mg / mL) aqueous solution and 1g of sodium alginate aqueous solution (0.40wt%), stir evenly to obtain a solution, spread the liquid evenly on the surface of the substrate, and then gel in a CaCl2 aqueous solution (0.1M) for 10 minutes to obtain an ultra-slippery coating.
[0064] Example 6
[0065] A method for preparing an ultra-slip coating on a substrate surface comprises the following steps:
[0066] Step 1: Plasma treat the substrate (pipe substrate or flat glass) for ten minutes;
[0067] Step 2: Take 7g of 1000cSt silicone oil, add 1.5g of PDDA (1.0mg / mL) aqueous solution and 1.5g of sodium alginate aqueous solution (0.40wt%), stir evenly to obtain a solution, spread the liquid evenly on the surface of the substrate, and then gel in a CaCl2 aqueous solution (0.1M) for 10 minutes to obtain an ultra-slippery coating.
[0068] Performance Testing
[0069] 1. Contact angle and sliding angle measurement
[0070] ①.Measure the contact angle
[0071] The contact angles of Examples 1 to 4 were measured using a fully automatic video optical contact angle measuring instrument. Figure 1 4 is a contact angle bar graph of various embodiments of the present invention.
[0072] from Figure 1 It can be seen that the contact angles of Examples 3 and 4 are quite different, and the difference between Examples 3 and 4 is whether silicone oil is added. Therefore, whether silicone oil is added or not has a huge impact on the contact angle of the coating.
[0073] ②.Measure the sliding angle
[0074] The sliding angles of Examples 1 and 2 and Comparative Examples 1-2 were measured using a fully automatic video optical contact angle measuring instrument. Figure 2 It is a sliding angle bar graph of various embodiments of the present invention.
[0075] from Figure 2 It can be seen that the sliding angles of Examples 1 and 2 are quite different, and the difference between Examples 1 and 2 is whether silicone oil is added; the sliding angles of Examples 3 and 4 are quite different, and the difference between Examples 3 and 4 is whether silicone oil is added. That is, whether silicone oil is added or not has a huge impact on the sliding angle of the coating. Since the sliding angle test shows that only surfaces with a sliding angle lower than 10° are super-slip coatings, only Examples 2 and 4 are super-slip coatings, and Examples 1 and 3 are not super-slip coatings. Therefore, the preparation of super-slip coatings requires the joint action of two components, and a single component cannot prepare a super-slip coating that meets the requirements for both contact angle and sliding angle.
[0076] 2. Microscopic observation of inner coating of pipeline substrate
[0077] When the substrate of Example 2 is a pipeline substrate, the inner coating of the pipeline is observed using an electron scanning microscope. Figure 3 This is a micrograph of the inner coating of the pipeline in Example 2. As can be seen from the figure, the inner coating prepared in Example 2 is uniform and smooth, proving that the coating is uniformly formed on the inner surface of the pipeline.
[0078] 3. Anti-bile adhesion test on planar substrates
[0079] When the substrate of Example 2 is flat glass, pig bile is used to test its anti-bile adhesion effect. Figure 4 This is a picture showing the effect of anti-bile adhesion of Example 2. When the glass slide is tilted 15°, bile can slide down the coated part by itself, proving its sliding performance. No bile remains on the coated part after it slides over, proving its anti-adhesion performance.
[0080] 4. Antibacterial test
[0081] When the substrate of Examples 1 to 4 is flat glass, all samples are placed in a 37°C Escherichia coli suspension (1×10 7 cells ml -1 ) for 24 hours. After incubation, the loosely attached bacteria on the sample surface were washed off, and then the attached bacteria on the surface were eluted by ultrasound and collected by centrifugation. The collected bacterial suspension was further diluted and spread on Luria broth (LB) agar plates and cultured at 37°C for 24 hours. The traditional colony counting method was used to evaluate the number of viable bacteria attached to the sample surface.
[0082] Figure 5The antibacterial effect diagram of each embodiment on Escherichia coli. It can be seen from the figure that the number of live Escherichia coli in Examples 1 and 3 is significantly greater than that in Examples 2 and 4. Therefore, the antibacterial effect of the super-slip coating formed by the two components working together is very good, and a single component cannot prepare a coating that meets the antibacterial requirements.
[0083] 5. Bile circulation test
[0084] Bile circulation fluid: Take 10 ml of human bile and add 90 ml of deionized water. Get 10-fold diluted human bile. Take a single colony of E. coli and add 5 ml of liquid culture medium and culture at 37°C for 4 hours. Measure OD 600nm at 0.740-0.840Abs to get E. coli bacterial solution. Take 2 ml of bacterial solution and add 10-fold diluted human bile, then take 0.55 g of cellulose (90 μm) and add it to the liquid. Get bile circulation fluid. .
[0085] When the substrate of Examples 1 to 4 is a pipeline substrate, the sample is placed in bile circulation fluid, heated to 37°C in a water bath, stirred to prevent cellulose deposition, and the circulation flow rate is 1 ml / min. After 3 days of circulation, the sample is taken out and the adhesion is observed using an electron scanning microscope.
[0086] Figure 6 The results of the bile circulation experiment of each embodiment are shown in the figure. It can be seen from the figure that the number of live Escherichia coli in Examples 1 and 3 is significantly greater than that in Examples 2 and 4, and the surface is rough. Therefore, the coating formed by the two components working together not only has a very smooth surface, but also has a very good antibacterial effect; on the contrary, a single component can neither prepare a coating that meets the antibacterial requirements nor a super-slip coating that meets the requirements.
[0087] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.
Claims
1. A composition for preparing an ultra-slip coating, characterized in that: The composition comprises: 40-90 parts by weight of component A, 10-50 parts by weight of component B, and 5-30 parts by weight of a catalyst; The component A is selected from at least one of polymethylsiloxane, polyethylsiloxane, epoxysiloxane, and hydrogel network raw materials; The component B is selected from at least one of silicone oil, perfluorinated liquid, vegetable oil, and mineral oil; The catalyst is selected from at least one of a metal catalyst, an acid-base catalyst, and a heterogeneous catalyst.
2. A composition for preparing a super-slip coating according to claim 1, characterized in that: The composition consists of 60 to 80 parts by weight of component A, 20 to 40 parts by weight of component B and 10 to 15 parts by weight of a catalyst.
3. A composition for preparing a super-slip coating according to claim 1 or 2, characterized in that: The component A is selected from polymethylsiloxane, and the component B is selected from silicone oil.
4. A composition for preparing a super-slip coating according to claim 3, characterized in that: The polymethylsiloxane is selected from polydimethylsiloxane.
5. A composition for preparing a super-slip coating according to claim 1, characterized in that: The component A is selected from hydrogel network raw materials, and the component B is selected from silicone oil.
6. A composition for preparing a super-slip coating according to claim 5, characterized in that: The hydrogel network raw materials include sodium alginate and polydiallyl dimethyl ammonium chloride, and the weight ratio of the sodium alginate to the polydiallyl dimethyl ammonium chloride is 1 to (0.8 to 1.2).
7. A composition for preparing a super-slip coating according to any one of claims 1 to 6, characterized in that: The viscosity of the silicone oil is 5 to 10000 cSt.
8. A method for preparing a super-slip coating, characterized in that: include: After pre-treating the substrate, the composition according to any one of claims 1 to 7 is spread on the surface to prepare the super-slip coating.
9. The method for preparing a super-slip coating according to claim 8, characterized in that: The preparation method comprises: Step 1: pre-treating the substrate; Step 2: Spreading silane coupling agent on the surface of the substrate; Step 3: Spread the composition described in claim 3 or 4 on the surface to prepare the super-slip coating.
10. The method for preparing a super-slip coating according to claim 8, characterized in that: The preparation method comprises: Step 1: pre-treating the substrate; Step 2: Spread the composition described in claim 5 or 6 on the surface and immerse it in a CaCl2 aqueous solution to prepare an ultra-slip coating.