CN115109335B - Anti-scaling material and lotus leaf bionic tube prepared from same - Google Patents
Anti-scaling material and lotus leaf bionic tube prepared from same Download PDFInfo
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- CN115109335B CN115109335B CN202210547260.5A CN202210547260A CN115109335B CN 115109335 B CN115109335 B CN 115109335B CN 202210547260 A CN202210547260 A CN 202210547260A CN 115109335 B CN115109335 B CN 115109335B
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- 239000004698 Polyethylene Substances 0.000 claims abstract description 18
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
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- 230000003592 biomimetic effect Effects 0.000 claims description 11
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- 239000006087 Silane Coupling Agent Substances 0.000 claims description 7
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
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- 229910052682 stishovite Inorganic materials 0.000 description 5
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- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
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- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
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- 229910052710 silicon Inorganic materials 0.000 description 2
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- PYJJCSYBSYXGQQ-UHFFFAOYSA-N trichloro(octadecyl)silane Chemical compound CCCCCCCCCCCCCCCCCC[Si](Cl)(Cl)Cl PYJJCSYBSYXGQQ-UHFFFAOYSA-N 0.000 description 2
- NMEPHPOFYLLFTK-UHFFFAOYSA-N trimethoxy(octyl)silane Chemical compound CCCCCCCC[Si](OC)(OC)OC NMEPHPOFYLLFTK-UHFFFAOYSA-N 0.000 description 2
- DVTWVKVOIRUVPT-UHFFFAOYSA-N C(CCCCCCCCCCCCCCCC)C(O[Si](OC)(OC)CCCCCCCCCC)F Chemical compound C(CCCCCCCCCCCCCCCC)C(O[Si](OC)(OC)CCCCCCCCCC)F DVTWVKVOIRUVPT-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Silicon Compounds (AREA)
- Medicinal Preparation (AREA)
Abstract
The invention discloses an anti-scaling material and a lotus leaf bionic tube prepared from the same, and belongs to the technical field of high polymer materials. The anti-scaling material comprises the following components in parts by weight: 100 parts of heat-resistant polyethylene and 9-13 parts of hydrophobic raspberry-shaped PS-SiO 2 composite particles. The anti-scaling material is prepared by combining a low-surface energy heat-resistant polyethylene substrate and micro-nano rough surface hydrophobic raspberry-shaped PS-SiO 2 composite particles, and is combined to form a lotus-like structure, so that the material forms a larger contact angle with the surface of water, deposition of scale is radically stopped, and the anti-scaling effect is achieved. The lotus leaf bionic pipe comprises a lotus leaf bionic anti-scaling inner layer and an outer layer, the hydrophobic raspberry PS-SiO 2 composite particles are utilized, the contact angle between water and the inner layer is greatly increased, the surface energy is reduced, a hydrophobic interface is constructed, the self-cleaning effect of the pipe is achieved, the specific inner and outer pipe thickness setting is combined, and the stability of the quality of the pipe is effectively ensured while the self-cleaning is carried out.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to an anti-scaling material and a lotus leaf bionic tube prepared from the same.
Background
Besides the factors such as water supply temperature and pressure influence the heating effect, the reduction of the heating temperature of the water floor heating system is largely related to the scaling of the floor heating pipes. After the pipeline is scaled, the pipeline is reduced in diameter, the flow cross section area is reduced, pressure damage, displacement reduction and pipeline blockage are caused, and then the heating effect is poor, and the room cannot reach comfortable temperature. In industrial production, chemical agent soaking method, projectile type cleaning method, pulse wave physical cleaning method and the like are commonly used, but the descaling modes are not ideal in effect, and even consume a large amount of materials and labor cost and take a large amount of time. In order to better and more efficiently use the water floor heating system, the anti-scaling performance of the floor heating pipeline is not neglected, the development of the lotus leaf bionic floor heating pipe greatly improves the anti-scaling performance, and the increase of the surface contact angle is an important research problem of lotus leaf bionic materials.
The prior art discloses an anti-scaling floor heating pipeline with high heat-conducting property and a preparation method thereof, wherein the anti-scaling floor heating pipeline mainly comprises fumed silica and polyvinyl alcohol which contain rich oxygen-containing functional groups such as hydroxyl and carboxyl, and water which can be connected through hydrogen bonds, has excellent hydrophilic property, and can form a thin water film on the surface of an anti-scaling layer, so that the anti-scaling floor heating pipeline has the anti-scaling effect. The improvement of the anti-scaling performance is that a layer of water film is formed on the surface, the contact angle of the surface of the material is only 30 degrees, and the anti-scaling problem of the lotus leaf bionic floor heating pipe cannot be solved.
Disclosure of Invention
The invention aims to overcome the defects and defects of the prior lotus leaf bionic floor heating pipe material that the surface contact angle is too small and the hydrophobicity and the anti-scaling performance are poor, and provides the anti-scaling material, wherein a mastoid structure is constructed by hydrophobic raspberry-shaped PS-SiO 2 composite particles to form a rough surface, and meanwhile, the strengthening improvement of the surface hydrophobicity and the anti-scaling performance is achieved by the hydrophobicity of the hydrophobic raspberry-shaped PS-SiO 2 composite particles.
The invention further aims at providing a lotus leaf bionic tube.
The invention further aims at providing a preparation method of the lotus leaf bionic tube.
The above object of the present invention is achieved by the following technical scheme:
The anti-scaling material comprises the following components in parts by weight: 100 parts of heat-resistant polyethylene and 9-13 parts of hydrophobic raspberry PS-SiO 2 composite particles,
The hydrophobic raspberry-shaped PS-SiO 2 composite particle is prepared by the following method:
S1, preparing polystyrene microsphere dispersion liquid: adding styrene and an initiator into an ethanol solution of a dispersing agent, reacting under the condition of inert gas, and separating and purifying to obtain polystyrene microsphere dispersion liquid with the particle size of 1-10 mu m;
S2, preparing raspberry PS-SiO 2 composite particles: dispersing PVP into polystyrene microsphere dispersion liquid in S1, adding tetraethoxysilane solution, and reacting at normal temperature under the condition that the pH value is 8-10 to obtain raspberry PS-SiO 2 composite particles;
S3, preparing hydrophobic raspberry-shaped PS-SiO 2 composite particles: uniformly mixing the raspberry PS-SiO 2 composite particles and the silane coupling agent, and reacting for 10-14 h at 45-50 ℃ to prepare the hydrophobic raspberry PS-SiO 2 composite particles.
The following description is needed:
The dispersing agent in S1 can be polyvinylpyrrolidone PVP, and in the dispersing polymerization step of S1, the dispersing agent is used for isolating the polymerization point, so that the polystyrene microsphere with the particle size of about 1-10 μm can be obtained. AIBN is an initiator to initiate polymerization of styrene to polystyrene.
The step of adding PVP into the S2 in the step of generating raspberry-shaped PS-SiO 2 composite particles is that carbonyl is converted into hydroxyl and nano SiO 2 are combined together through condensation reaction under alkaline condition, and nano SiO 2 is uniformly distributed on PS microspheres due to self negatively charged homopolar repulsion by PVP.
Meanwhile, ammonia water can be used for controlling the pH value to be 8-10, the ammonia water can also be used as a catalyst, the generated OH - attacks silicon atomic nuclei, the silicon oxygen bonds are weakened to break, the hydrolysis is completed, the larger the pH value is, the faster the reaction is, the larger the particle size is, the pH value is not easy to be too high, otherwise, the adhesion effect is poor after the particle size is increased, and the raspberry-shaped structure is not easy to be stable.
TEOS is used for producing nano silicon dioxide, so that monodisperse nano silicon dioxide can be obtained, and the dispersity is good. By utilizing the adsorption effect of PVP on TEOS, siO 2 generated after the hydrolysis of TEOS is fixed on the surface of PS microspheres to form a raspberry-shaped structure, thus obtaining a rough surface.
And S3, the silane coupling agent reacts with the nano silicon dioxide to carry out surface modification on the nano silicon dioxide, and a hydrophobic chain is grafted on a side chain of the nano silicon dioxide to obtain raspberry-shaped particles with low surface energy, so that the aim of hydrophobicity is achieved, and meanwhile, the surface energy is reduced, so that the contact angle between water and the lotus leaf bionic anti-scaling inner layer is increased.
The silicon coupling agent can be one or more of n-octyl trimethoxy silane, octadecyl trichloro silane and heptadecyl fluoro decyl trimethoxy silane.
In the anti-scaling material, the heat-resistant polyethylene is a low-surface-energy base material, the hydrophobic raspberry PS-SiO 2 composite particles are micro-nano rough surfaces, and the two are combined to form a lotus-like structure, so that the contact angle of the material and the surface of water is more than 140 degrees, deposition of scale is radically stopped, and the anti-scaling effect is achieved.
The hydrophobic raspberry-shaped PS-SiO 2 composite particles have good dispersibility in the heat-resistant polyethylene base material due to the raspberry-shaped mastoid structure, and the surface treatment of the coupling agent has small acting force among particles, so that the particles are easy to disperse in the granulating and shearing processes, are not easy to agglomerate, and effectively avoid the problem of precipitation of dopants in production.
Preferably, the composition comprises the following components in parts by weight: 100 parts of heat-resistant polyethylene and 10-12 parts of hydrophobic raspberry-shaped PS-SiO 2 composite particles.
Preferably, the hydrophobic raspberry-shaped PS-SiO 2 composite particles have a micron mastoid structure, and the mastoid size is 3-9 mu m.
Mastoid sizes, which may be, for example, micron mastoid structures, are 3.6 μm;
Or may be of a micrometre mastoid structure with a mastoid size of 5.3 μm;
or may be of a micrometer mastoid structure with a mastoid size of 6.8 μm.
Further preferably, the hydrophobic raspberry-shaped PS-SiO 2 composite particle has a micron mastoid structure, and the mastoid size is 5-7 μm.
The micron mastoid size of the hydrophobic raspberry-shaped PS-SiO 2 composite particle can be controlled to be closer to that of a lotus leaf bionic hydrophobic structure, and the contact angle is better controlled to be more than 140 degrees.
Preferably, the silane coupling agent is heptadecafluorodecyl trimethoxysilane.
The invention also specifically protects a lotus leaf bionic pipe which comprises a lotus leaf bionic anti-scaling inner layer and an outer layer, wherein the lotus leaf bionic anti-scaling inner layer is prepared from the anti-scaling material, the thickness is 0.4-0.6 mm, and the ratio of the thicknesses of the lotus leaf bionic anti-scaling inner layer and the outer layer is 1 (4-6).
Further preferably, the thickness of the lotus leaf bionic anti-scaling inner layer is 0.4mm, and the ratio of the thicknesses of the lotus leaf bionic anti-scaling inner layer and the outer layer is 1:6.
The thickness of the lotus leaf bionic anti-scaling inner layer and the thickness ratio of the inner layer to the outer layer are controlled. Not only is beneficial to industrial production, but also the stability of the quality of the pipe is realized, and the hydrostatic strength of the pipe is not adversely affected.
Preferably, the lotus leaf bionic anti-scaling inner layer and the outer layer of the lotus leaf bionic pipe are integrally formed by double-layer coextrusion.
Further preferably, the double-layer coextrusion temperature is 190-210 ℃ and the extrusion speed is 20-25 m/min.
In a specific embodiment, the specific extrusion operation of the lotus leaf biomimetic tube may be performed according to the following steps:
the lotus leaf bionic pipe is of a two-layer structure, raw materials of each layer of the inner layer and the outer layer of the lotus leaf bionic anti-scaling layer are extruded by a double-layer co-extrusion die through a main extruder, the outer layer of the lotus leaf bionic anti-scaling layer is extruded by a secondary extruder, the composite co-extrusion is carried out at the temperature of 190-210 ℃, the extrusion speed is 20-25m/min, and the finished lotus leaf bionic pipe is obtained through cooling forming and cutting.
The lotus leaf bionic tube adopts the hydrophobic raspberry-shaped PS-SiO 2 composite particles, can obtain a micro-nano structure on the inner surface, wherein the composite particles are uniformly dispersed on the surface to form mastoid, the hydrophobic nano SiO 2 on the composite particles is used as the nano micro structure on the mastoid, the contact angle between water and an inner layer is greatly increased, the surface energy is reduced, a hydrophobic interface is constructed, the self-cleaning effect is achieved, the lotus leaf bionic tube can be used as various tubes with anti-scaling requirements, and the lotus leaf bionic tube is particularly suitable for being used as a ground heating tube, has self-cleaning anti-scaling capability, and can effectively prolong the service life of the tube.
Compared with the prior art, the invention has the beneficial effects that:
the anti-scaling material is prepared by combining a low-surface energy heat-resistant polyethylene substrate and micro-nano rough surface hydrophobic raspberry-shaped PS-SiO 2 composite particles, and is combined to form a lotus-like structure, so that the material forms a larger contact angle with the surface of water, deposition of scale is radically stopped, and the anti-scaling effect is achieved.
The lotus leaf bionic pipe comprises a lotus leaf bionic anti-scaling inner layer and an outer layer, the hydrophobic raspberry PS-SiO 2 composite particles are utilized, the contact angle between water and the inner layer is greatly increased, the surface energy is reduced, a hydrophobic interface is constructed, the self-cleaning effect of the pipe is achieved, the specific inner and outer pipe thickness setting is combined, and the stability of the quality of the pipe is effectively ensured while the self-cleaning is carried out.
Detailed Description
The invention will be further described with reference to the following specific embodiments, but the examples are not intended to limit the invention in any way. Raw materials reagents used in the examples of the present invention are conventionally purchased raw materials reagents unless otherwise specified.
Examples 1 to 4
An anti-scaling material comprises the following components in parts by weight as shown in table 1.
TABLE 1
| Sequence number | Example 1 | Example 2 | Example 3 | Example 4 |
| Heat-resistant polyethylene | 100 | 100 | 100 | 100 |
| Hydrophobic raspberry-shaped PS-SiO 2 composite particle | 9 | 10 | 12 | 13 |
The preparation method of the hydrophobic raspberry-shaped PS-SiO 2 composite particle specifically comprises the following steps:
S1, preparing polystyrene microsphere dispersion liquid: 3 parts of dispersing agent PVP is completely dissolved in a mixed solvent consisting of 95 parts of ethanol and 5 parts of water, the mixed solvent is added into a glass reaction kettle provided with a thermometer, a stirrer and a condenser tube, 25 parts of monomer styrene and 4 parts of initiator AIBN are added, nitrogen is introduced into the mixture to clean the mixture for 30 minutes, the mixture is reacted for 6 hours under the oil bath condition of 70 ℃, the obtained polystyrene emulsion is centrifugally separated, ethanol/water is washed for three times, and polystyrene microsphere dispersion liquid is obtained, wherein the particle size of polystyrene microsphere is 6 mu m;
S2, preparing raspberry PS-SiO 2 composite particles: dissolving 0.04 part of PVP in a white dispersion liquid of PS microspheres, stirring at normal temperature for 25min to enable a sample to be fully dispersed in a system, dissolving 1.6 parts of ammonia water and 1 part of TEOS in 4 parts of ethanol simultaneously, adding into the system while stirring, and continuing the whole sol-gel process for 24h under constant temperature stirring at 25 ℃ to obtain raspberry-shaped PS-SiO 2 composite particles;
s3, preparing hydrophobic raspberry-shaped PS-SiO2 composite particles: the raspberry PS-SiO 2 composite particles and 90 parts of hydrophobic agent heptadecafluorodecyl trimethoxy silane are added into ethanol, and the whole system is stirred for 1h to ensure uniform mixing. And continuously condensing and refluxing the system for 12 hours at the constant temperature of 50 ℃, and drying the system for 2 hours at the temperature of 120 ℃ to obtain the hydrophobic raspberry-shaped PS-SiO 2 composite particles, wherein the structure of the mastoid is in a micron mastoid structure, and the mastoid size is 6.8 mu m.
The parts are all mass parts.
Example 5
An anti-scaling material comprises the same combination and content as in example 3, except that in the preparation method of the hydrophobic raspberry-shaped PS-SiO 2 composite particle, the amount of the dispersing agent in S1 is 2 parts, the structure of the mastoid is micrometer, and the mastoid size is 7.5 μm.
Example 6
An anti-scaling material comprises the same combination and content as in example 3, except that in the preparation method of the hydrophobic raspberry-shaped PS-SiO 2 composite particle, the amount of the dispersing agent in S1 is 4 parts, the structure of the mastoid is micrometer, and the mastoid size is 5.3 μm.
Example 7
An anti-scaling material comprises the same combination and content as in example 3, except that in the preparation method of the hydrophobic raspberry-shaped PS-SiO 2 composite particle, the amount of the dispersing agent in S1 is 5 parts, the structure of the mastoid is micrometer, and the mastoid size is 3.6 μm.
Example 8
An anti-scaling material comprises the same combination and content as in example 3, except that in the preparation method of the hydrophobic raspberry-shaped PS-SiO 2 composite particle, the silane coupling agent in S3 is n-octyl trimethoxy silane.
Example 9
An anti-scaling material comprises the same combination and content as in example 3, except that in the preparation method of the hydrophobic raspberry-shaped PS-SiO 2 composite particle, the silane coupling agent in S3 is octadecyl trichlorosilane.
Example 10
A lotus leaf bionic pipe comprises a lotus leaf bionic anti-scaling inner layer and an outer layer, wherein the lotus leaf bionic anti-scaling inner layer is prepared from anti-scaling materials, the inner layer comprises 100 parts of heat-resistant polyethylene, 11 parts of hydrophobic raspberry PS-SiO2 composite particles and 3 parts of color master, and the materials are mixed and granulated for later use; the outer layer comprises 100 parts of heat-resistant polyethylene and 3 parts of color masterbatch.
The preparation method comprises the following steps:
Uniformly mixing the raw materials of the inner layer and the outer layer of the lotus leaf bionic anti-scaling agent respectively, continuing for 3min, adopting a double-layer co-extrusion die, carrying out composite co-extrusion at 200 ℃, extruding the inner layer by a main extruder, extruding the outer layer by a secondary extruder at the extrusion speed of 25m/min, cooling, forming and cutting to obtain the lotus leaf bionic anti-scaling agent.
The thickness of the lotus leaf bionic anti-scaling inner layer is 0.6mm, and the ratio of the thicknesses of the lotus leaf bionic anti-scaling inner layer and the lotus leaf bionic anti-scaling outer layer is 1:4.
Example 11
A lotus leaf bionic pipe comprises a lotus leaf bionic anti-scaling inner layer and an outer layer, wherein the lotus leaf bionic anti-scaling inner layer is prepared from anti-scaling materials, the inner layer comprises 100 parts of heat-resistant polyethylene, 11 parts of hydrophobic raspberry PS-SiO2 composite particles and 3 parts of color master, and the materials are mixed and granulated for later use; the outer layer comprises 100 parts of heat-resistant polyethylene and 3 parts of color masterbatch.
The preparation method comprises the following steps:
Uniformly mixing the raw materials of the inner layer and the outer layer of the lotus leaf bionic anti-scaling agent respectively, continuing for 3min, adopting a double-layer co-extrusion die, carrying out composite co-extrusion at 200 ℃, extruding the inner layer by a main extruder, extruding the outer layer by a secondary extruder at the extrusion speed of 25m/min, cooling, forming and cutting to obtain the lotus leaf bionic anti-scaling agent.
The thickness of the lotus leaf bionic anti-scaling inner layer is 0.5mm, and the ratio of the thicknesses of the lotus leaf bionic anti-scaling inner layer and the lotus leaf bionic anti-scaling outer layer is 1:5.
Example 12
A lotus leaf bionic pipe comprises a lotus leaf bionic anti-scaling inner layer and an outer layer, wherein the lotus leaf bionic anti-scaling inner layer is prepared from anti-scaling materials, the inner layer comprises 100 parts of heat-resistant polyethylene, 11 parts of hydrophobic raspberry PS-SiO2 composite particles and 3 parts of color master, and the materials are mixed and granulated for later use; the outer layer comprises 100 parts of heat-resistant polyethylene and 3 parts of color masterbatch.
The preparation method comprises the following steps:
Uniformly mixing the raw materials of the inner layer and the outer layer of the lotus leaf bionic anti-scaling agent respectively, continuing for 3min, adopting a double-layer co-extrusion die, carrying out composite co-extrusion at 200 ℃, extruding the inner layer by a main extruder, extruding the outer layer by a secondary extruder at the extrusion speed of 20m/min, cooling, forming and cutting to obtain the lotus leaf bionic anti-scaling agent.
The thickness of the lotus leaf bionic anti-scaling inner layer is 0.4mm, and the ratio of the thicknesses of the lotus leaf bionic anti-scaling inner layer and the lotus leaf bionic anti-scaling outer layer is 1:6.
Comparative example 1
A lotus leaf bionic tube comprises the same preparation method as in example 12
Except that the lotus leaf bionic anti-scaling inner layer anti-scaling material comprises the same combination and content as in example 1, and the difference is that the hydrophobic raspberry-shaped PS-SiO 2 composite particles are 7 parts.
Comparative example 2
A lotus leaf bionic tube comprises the same preparation method as in example 12
The lotus leaf bionic anti-scaling inner layer anti-scaling material comprises the same combination and content as in example 1, and is characterized in that 15 parts of hydrophobic raspberry-shaped PS-SiO 2 composite particles are adopted.
Comparative example 3
A lotus leaf bionic pipe comprises a lotus leaf bionic anti-scaling inner layer and an outer layer, wherein the lotus leaf bionic anti-scaling inner layer is prepared from anti-scaling materials, the inner layer comprises 100 parts of heat-resistant polyethylene, 11 parts of hydrophobic raspberry PS-SiO2 composite particles and 3 parts of color master, and the materials are mixed and granulated for later use; the outer layer comprises 100 parts of heat-resistant polyethylene and 3 parts of color masterbatch.
The specific preparation method is the same as in example 12.
The thickness of the lotus leaf bionic anti-scaling inner layer is 0.3mm, and the ratio of the thicknesses of the lotus leaf bionic anti-scaling inner layer and the lotus leaf bionic anti-scaling outer layer is 1:8.
Comparative example 4
A lotus leaf bionic tube comprises a preparation method which is the same as that of the embodiment 12.
The lotus leaf bionic anti-scaling inner layer anti-scaling material comprises the same combination and content as in the embodiment 1, and is different in that the pH value of S2 is 7 in the preparation process of the hydrophobic raspberry-shaped PS-SiO 2 composite particle.
Comparative example 5
A lotus leaf bionic tube comprises a preparation method which is the same as that of the embodiment 12.
The lotus leaf bionic anti-scaling inner layer anti-scaling material comprises the same combination and content as in the embodiment 1, and is characterized in that the pH value of S2 in the preparation process of the hydrophobic raspberry-shaped PS-SiO 2 composite particle is 11.
Result detection
(1) Contact angle detection
The anti-scaling material is made into a sheet (30 mm), the contact angle of the inner wall of the inner layer is measured by a static contactor, and the contact angle of the plastic film and water of national standard GB/T30693-2014 is referred to, and the specific detection results are shown in the table 2 below.
TABLE 2
| Sequence number | Contact angle/° |
| Example 1 | 141.7 |
| Example 2 | 151.2 |
| Example 3 | 150.8 |
| Example 4 | 142.9 |
| Example 5 | 140.3 |
| Example 6 | 145.1 |
| Example 7 | 143.6 |
| Example 8 | 142.2 |
| Example 9 | 141.4 |
| Example 10 | 152.5 |
| Example 11 | 151.3 |
| Example 12 | 150.2 |
| Comparative example 1 | 130.3 |
| Comparative example 2 | 139.4 |
| Comparative example 3 | 128.7 |
| Comparative example 4 | 136.4 |
| Comparative example 5 | 124.5 |
Wherein, the PS microspheres of the hydrophobic raspberry-shaped PS-SiO 2 composite particles of examples 1 to 4 and examples 8 to 12 have a mastoid size of 6.8 μm.
The PS microsphere of the hydrophobic raspberry-shaped PS-SiO 2 composite particle of example 5 had a mastoid size of 7.5. Mu.m.
The PS microsphere of the hydrophobic raspberry-shaped PS-SiO 2 composite particle of example 6 had a mastoid size of 5.3. Mu.m.
The PS microsphere of the hydrophobic raspberry-shaped PS-SiO 2 composite particle of example 7 had a mastoid size of 3.6. Mu.m.
(2) Pipe quality detection
The effect of different composite particle ratios and the ratio of thickness of the inner anti-fouling layer to the outer protective layer on hydrostatic strength (GB/T28799.2-2012) and cost are shown in Table 3.
TABLE 3 Table 3
As can be seen from tables 2 and 3, when the number of parts of the hydrophobic raspberry-shaped PS-SiO 2 composite particles is 9-13 and the thickness ratio of the anti-scaling inner layer to the protective outer layer is 1 (4-6), the hydrostatic test of the lotus leaf bionic tube can achieve no rupture and no leakage, the cost is increased to be controlled within 15%, and the composite particle can meet the related standard performance and the cost requirement.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (7)
1. The lotus leaf bionic pipe is characterized by comprising a lotus leaf bionic anti-scaling inner layer and an outer layer, wherein the lotus leaf bionic anti-scaling inner layer is prepared from anti-scaling materials, the thickness ratio of the lotus leaf bionic anti-scaling inner layer to the outer layer is 1 (4-6), and the thickness of the lotus leaf bionic anti-scaling inner layer is 0.4-0.6 mm;
The anti-scaling material comprises the following components in parts by weight: 100 parts of heat-resistant polyethylene and 9-13 parts of hydrophobic raspberry PS-SiO 2 composite particles,
The hydrophobic raspberry-shaped PS-SiO 2 composite particle is prepared by the following method:
s1, preparing polystyrene microsphere dispersion liquid: adding styrene and an initiator into an ethanol solution of a dispersing agent, reacting under the condition of inert gas, and separating and purifying to obtain polystyrene microsphere dispersion liquid with the particle size of 1-10 mu m;
S2, preparing raspberry-shaped PS-SiO 2 composite particles: dispersing PVP into the polystyrene microsphere dispersion liquid in the S1, adding an ethyl orthosilicate solution, and reacting at normal temperature under the condition that the pH value is 8-10 to obtain raspberry PS-SiO 2 composite particles;
S3, preparing hydrophobic raspberry-shaped PS-SiO 2 composite particles: uniformly mixing the raspberry PS-SiO 2 composite particles and a silane coupling agent, and reacting at 45-50 ℃ for 10-14 h to prepare hydrophobic raspberry PS-SiO 2 composite particles;
The hydrophobic raspberry-shaped PS-SiO 2 composite particles are of a micron mastoid structure, and the mastoid size is 3-9 mu m.
2. The lotus leaf biomimetic tube of claim 1, wherein the anti-scaling material comprises the following components in parts by weight: 100 parts of heat-resistant polyethylene and 10-12 parts of hydrophobic raspberry PS-SiO 2 composite particles.
3. The lotus leaf biomimetic tube of claim 1, wherein the hydrophobic raspberry-shaped PS-SiO 2 composite particles of the anti-scaling material are of a micrometer mastoid structure, and the mastoid size is 5-7 μm.
4. A lotus leaf biomimetic tube as in claim 1, wherein said anti-fouling material said silane coupling agent is heptadecafluorodecyl trimethoxysilane.
5. The lotus leaf biomimetic tube of claim 1, wherein the thickness of the lotus leaf biomimetic anti-scaling inner layer is 0.4mm and the ratio of the thicknesses of the lotus leaf biomimetic anti-scaling inner layer and the outer layer is 1:6.
6. The lotus leaf biomimetic tube of claim 1, wherein the lotus leaf biomimetic anti-scaling inner layer and the outer layer of the lotus leaf biomimetic tube are integrally formed by double-layer coextrusion.
7. The lotus leaf biomimetic tube of claim 6, wherein the double-layer coextrusion temperature is 190-210 ℃ and the extrusion speed is 20-25 m/min.
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