Wear-resistant and corrosion-resistant rubber material for pore-forming pipe body of tubular pile and preparation method of wear-resistant and corrosion-resistant rubber material

Abstract

The invention relates to the technical field of advanced petrochemical and chemical new materials, and provides a wear-resistant and corrosion-resistant rubber material for a pipe pile pore-forming pipe body and a preparation method thereof.The preparation method comprises the steps that magnetization treatment and serialization treatment are conducted on magnetic silicon-based emulsion to prepare nano ordered silicon-based emulsion; the preparation method comprises the following steps: forming a nano ordered silicon-based emulsion into core particles, and coating the outer sides of the core particles with a symbiotic shell layer to prepare a reinforced symbiotic phase; and thermally forming the reinforced symbiotic phase and the rubber matrix into the wear-resistant and corrosion-resistant rubber material for the pore-forming pipe body of the pipe pile. According to the wear-resistant and corrosion-resistant rubber material for the pipe pile pore-forming pipe body and the preparation method of the wear-resistant and corrosion-resistant rubber material, the wear resistance, the corrosion resistance, the surface hardness and the smoothness of the rubber material for the pipe pile pore-forming pipe body can be remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of advanced petrochemical new materials, and in particular to a wear-resistant and corrosion-resistant rubber material for a pipe pile hole forming pipe body and a preparation method thereof. Background Art

[0002] In the field of building and infrastructure construction, precast concrete pipe piles are widely used due to their high strength, durability and ease of construction. During the prefabrication of pipe piles, the drilling technology of reserved channels is one of the key links to ensure the structural performance and construction quality of the pipe piles. At present, the drilling of reserved channels usually uses rubber tubes as drilling molds, which are equipped with high-strength steel core tube structures. The principle of elastic deformation (stretching and shrinking) of rubber is used to form reserved channels during the concrete pouring process, and the holes are formed by pulling out the rubber tubes after the initial setting of the concrete.

[0003] However, the rubber tube used for hole forming in the prior art has the following technical limitations: 1. Insufficient wear resistance: During the concrete pouring process, the relative movement between the rubber tube and the concrete will generate friction, causing wear on the surface of the rubber tube. Especially in the high-frequency production of prefabricated pipe piles, the insufficient wear resistance of the rubber tube will significantly reduce its service life and increase the frequency and cost of replacement.

[0004] 2. Poor corrosion resistance: During the concrete pouring process, the alkaline environment produced by the cement hydration reaction and the possible chemical additives will corrode the rubber tube. This corrosion will not only weaken the mechanical properties of the rubber tube, but also lead to a decrease in the surface quality of the hole, affecting the overall structural performance of the pipe pile.

[0005] 3. Insufficient surface hardness and smoothness: The surface hardness and smoothness of the rubber tube directly affect the smoothness of the extraction process. The surface hardness of the existing rubber tube materials is low and the smoothness is not enough. During the extraction process, the rubber tube is easily deformed or damaged due to excessive friction resistance, which in turn affects the straightness and accuracy of the hole.

[0006] 4. Unstable hole quality: Due to the performance limitations of existing rubber tube materials, problems such as hole deviation and uneven hole wall are prone to occur during the hole drilling process, making it difficult to ensure the quality of the reserved holes inside the pipe piles, which in turn affects subsequent steel bar installation, grouting and other processes.

[0007] The Chinese patent with publication number CN111849045A discloses a wear-resistant and corrosion-resistant elastomer material. The patent is based on nitrile rubber or its derivatives, and adds rigid polymer materials, ultrafine inorganic materials, reinforcing agents, vulcanizing agents, etc. The wear resistance and corrosion resistance of the material are improved through plasticizing, plasticizing, mixing and other processes. In practical applications, the patent scheme has the following shortcomings: it is difficult to achieve uniform dispersion at the nanoscale, there is an obvious bonding interface between the ultrafine inorganic material and the rubber matrix, resulting in low bonding strength, limited overall improvement in corrosion resistance and wear resistance, and there is inevitable segregation and local unevenness; it does not involve improvements in the surface hardness and finish of the material, and thus cannot be applied to complex working conditions such as pipe pile drilling that require high precision and high wear resistance and corrosion resistance.

[0008] Therefore, how to develop a high-performance wear-resistant and corrosion-resistant rubber material to improve the service life, hole quality and construction efficiency of the drilling pipe body is a technical problem that needs to be urgently solved in the field of prefabricated pipe piles. Summary of the invention

[0009] In view of this, in order to overcome the deficiencies of the prior art, the present invention aims to provide a wear-resistant and corrosion-resistant rubber material for a pipe pile hole forming pipe body and a preparation method thereof.

[0010] According to the first aspect of the present application, there is provided a method for preparing a wear-resistant and corrosion-resistant rubber material for a pipe body of a pipe pile hole, the method comprising: preparing a nano-ordered silicon-based emulsion by magnetizing and serializing a magnetic silicon-based emulsion; forming the nano-ordered silicon-based emulsion into core particles, and coating the outer side of the core particles with a symbiotic shell layer to prepare an enhanced symbiotic phase; and thermally forming the enhanced symbiotic phase and the rubber matrix into a wear-resistant and corrosion-resistant rubber material for the pipe body of a pipe pile hole.

[0011] Optionally, in the method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe body of the pipe pile drilling of the present application, the surface of the iron-based nano-magnetic particles is modified, the surface-modified iron-based nano-magnetic particles are dispersed in a silicon-based emulsion to prepare a magnetic silicon-based emulsion, the magnetic silicon-based emulsion is placed in a magnetic field, and the magnetic silicon-based emulsion is magnetized.

[0012] Optionally, in the preparation method of the wear-resistant and corrosion-resistant rubber material for the pipe body of the pipe pile drilling of the present application, the iron-based nano-magnetic particles are one of nano-ferrite magnetic particles, nano-cobalt ferrite magnetic particles or nano-nickel ferrite magnetic particles, the iron-based nano-magnetic particles are surface-modified with silicone oil, the silicon-based emulsion is prepared by constant-temperature emulsification of a silicon-based raw material and an emulsifier in deionized water, the silicon-based raw material includes dimethylsiloxane and its derivatives, the magnetic field intensity of the magnetization treatment is 0.28 T, and the time of the magnetization treatment is 8 minutes.

[0013] Optionally, in the method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe body of the pipe pile drilling of the present application, the magnetic silicon-based emulsion after magnetization treatment is placed in an electric field of 15kV / cm, and the magnetic silicon-based emulsion after magnetization treatment is serialized for 60s to prepare a nano-ordered silicon-based emulsion.

[0014] Optionally, in the preparation method of the wear-resistant and corrosion-resistant rubber material for the pipe body of the pipe pile drilling tube of the present application, a supercritical fluid and a nano-ordered silicon-based emulsion are mixed into a mixed fluid under supercritical conditions, the mixed fluid is pre-expanded and spray-granulated to obtain semi-solid nanoparticles, and the semi-solid nanoparticles are heat-treated in stages in an inert gas environment to obtain core particles.

[0015] Optionally, in the preparation method of the wear-resistant and corrosion-resistant rubber material for the pipe body of the pipe pile drilling of the present application, carbon dioxide is used as a supercritical fluid under supercritical conditions of a critical temperature of 31.2°C and a critical pressure of 8.28MPa, the supercritical fluid is mixed with a nano-ordered silicon-based emulsion in a volume ratio of 2:1 to form a mixed fluid, the mixed fluid is injected into a supercritical reactor at a temperature of 35°C and a pressure of 30MPa and stirred at a stirring power of 30kW for 20min, the mixed fluid is pre-expanded in a supercritical reactor at a temperature of 48°C and a pressure of 10MPa, the pre-expanded mixed fluid is spray-granulated into semi-solid nanoparticles, and the semi-solid nanoparticles are subjected to a first heat treatment of 120°C×40min and a second heat treatment of 195°C×30min in an inert gas environment to obtain core particles with an average particle size of 10-59nm.

[0016] Optionally, in the method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body of the present application, the core particles are dispersed in an organosilicon solution, and the organosilicon is coated on the surface of the core particles by spray drying to obtain a reinforced symbiotic phase.

[0017] Optionally, in the preparation method of the wear-resistant and corrosion-resistant rubber material for the pipe body of the pipe pile drilling of the present application, the core particles are ultrasonically dispersed in an organic silicon solution with dimethylsiloxane as the silicon source at a weight ratio of 1:35 to form a mixed slurry, and the mixed slurry is sprayed into a drying tower with a temperature of 120°C and a relative humidity of 20% through a centrifugal atomizer at a flow rate of 15 mL / min for drying, and the dried material is cured at 200°C × 3 h in an inert gas environment, and then cooled to room temperature to obtain a reinforced symbiotic phase.

[0018] Optionally, in the preparation method of the wear-resistant and corrosion-resistant rubber material for the pipe body of the pipe pile hole forming pipe of the present application, the reinforcing symbiotic phase is blended with the rubber matrix in a weight ratio of 1:9.5 and then melt-extruded, and the molten extruded material is thermoformed at 182°C × 10 min under a pressure of 15 MPa to obtain the wear-resistant and corrosion-resistant rubber material for the pipe body of the pipe pile hole forming pipe, wherein the melt extrusion includes a feeding section of 70°C × 6 min, a mixing section of 120°C × 11 min, a melting section of 150°C × 7 min and a homogenization section of 150°C × 3 min, and the rubber matrix is ​​hydrogenated nitrile rubber.

[0019] According to a second aspect of the present application, there is provided a wear-resistant and corrosion-resistant rubber material for a pipe pile hole forming pipe body, and the material is prepared according to the above method.

[0020] The wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body and the preparation method thereof of the present application have the following beneficial technical effects: 1. Significantly improve wear resistance: The nano-ordered silicon-based emulsion prepared by magnetization and serialization treatment, as well as the subsequent nano-reinforced symbiotic phase, significantly improves the wear resistance of the rubber matrix. The nano-reinforced phase forms a uniformly distributed reinforcement network in the rubber matrix, which effectively disperses the friction stress between the concrete and the rubber tube during the pore forming process, thereby extending the service life of the rubber tube.

[0021] 2. Significantly enhance the corrosion resistance: The magnetic silicon-based emulsion prepared by surface-modified iron-based nano-magnetic particles and the subsequent nano-ordered structure and the coating layer of the nano-reinforced phase can effectively block the chemical erosion of the rubber matrix by cement hydration products, significantly improving the corrosion resistance of the rubber material in an alkaline environment, thereby ensuring the integrity of the hole-forming pipe body during the concrete prefabrication process.

[0022] 3. Significantly improve surface hardness and smoothness: The introduction of nano-reinforced symbiotic phase improves the surface microstructure of the rubber matrix. The uniform distribution of the nano-reinforced phase makes the rubber tube exhibit a lower friction coefficient and higher surface flatness during the hole-forming process, significantly improving the surface hardness and smoothness of the material, thereby reducing the extraction resistance and improving the straightness and accuracy of the hole.

[0023] 4. Improve the quality and accuracy of hole making: By improving the wear resistance, corrosion resistance and surface properties, the hole making process is more stable, which can effectively avoid problems such as hole deviation and uneven hole wall. The improvement of hole making quality provides a better foundation for subsequent steel bar installation, grouting and other processes, and improves the overall structural performance of prefabricated pipe piles.

[0024] 5. Improve service application capabilities: The organic combination of the nano-enhanced symbiotic phase and the rubber matrix makes the rubber material not only have excellent wear and corrosion resistance, but also retains the elastic deformation characteristics of the rubber, which can meet the comprehensive performance requirements of the material in the process of pipe pile drilling, so that the rubber material can maintain stable performance in different construction environments and conditions, especially in complex chemical environments and high friction scenarios, showing good adaptability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 This is an example diagram of the steps of a method for preparing a wear-resistant and corrosion-resistant rubber material for a pipe pile hole forming pipe body according to Example 1 of the present application; Figure 2 is a particle size distribution diagram of the core particles prepared according to Example 6 of the present application; Figure 3 This is a SEM morphology image of the enhanced intergrowth phase prepared according to Example 6 of the present application; Figure 4 This is a TEM structural diagram of the enhanced intergrowth phase prepared according to Example 6 of the present application; Figure 5 is a TGA curve of the enhanced intergrowth phase prepared according to Example 6 of the present application; Figure 6 The quality change curve of the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body prepared according to Example 6 of the present application under various corrosion conditions. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] It should be noted that the following embodiments and features in the embodiments may be combined with each other in the absence of conflict; and, based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making any creative work are within the scope of protection of the present disclosure.

[0029] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein may be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present disclosure, it should be understood by those skilled in the art that an aspect described herein may be implemented independently of any other aspect, and two or more of these aspects may be combined in various ways. For example, any number of aspects described herein may be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein may be used to implement this device and / or practice this method.

[0030] Example 1 Figure 1 This is a step diagram of a method for preparing a wear-resistant and corrosion-resistant rubber material for a pipe pile hole body according to Example 1 of the present application, as shown in FIG. Figure 1 As shown, the preparation method of the wear-resistant and corrosion-resistant rubber material for the pipe body of the pipe pile hole in this embodiment is implemented in the following manner: Step S1: performing magnetization treatment and serialization treatment on the magnetic silicon-based emulsion to prepare a nano ordered silicon-based emulsion; Step S2: forming the nano ordered silicon-based emulsion into core particles, and coating the outer side of the core particles with a symbiotic shell layer to prepare an enhanced symbiotic phase; Step S3: The reinforcing symbiotic phase and the rubber matrix are thermoformed into a wear-resistant and corrosion-resistant rubber material for a pile hole forming pipe body.

[0031] Example 2 The present embodiment provides a method for preparing a wear-resistant and corrosion-resistant rubber material for a pipe body of a pipe pile hole. In the method of the present embodiment, the surface of iron-based nano-magnetic particles is modified, the surface-modified iron-based nano-magnetic particles are dispersed in a silicon-based emulsion to prepare a magnetic silicon-based emulsion, the magnetic silicon-based emulsion is placed in a magnetic field, and the magnetic silicon-based emulsion is magnetized.

[0032] As an optional example, in this embodiment, the iron-based nano-magnetic particles are one of nano-ferrite magnetic particles, nano-cobalt ferrite magnetic particles or nano-nickel ferrite magnetic particles, and the iron-based nano-magnetic particles are surface-modified with silicone oil. The silicon-based emulsion is prepared by constant-temperature emulsification of silicon-based raw materials and emulsifiers in deionized water, and the silicon-based raw materials include dimethyl siloxane and its derivatives. The emulsifier in this embodiment can be one of alkyl polyoxyethylene ether ammonium sulfate, fatty alcohol polyoxyethylene ether sodium sulfosuccinate or nonylphenol polyoxyethylene ether. When implementing the method of this application, those skilled in the art can select other emulsifiers according to the actual application scenario, and this application does not limit this.

[0033] In this embodiment, the magnetic silicon-based emulsion is placed in a magnetic field for magnetization treatment, thereby significantly enhancing the magnetic responsiveness of the magnetic silicon-based emulsion, and optimizing the distribution of the iron-based nano-magnetic particles through the magnetic field induction effect.

[0034] As an optional example, in this embodiment, the magnetic silicon-based emulsion after magnetization treatment is placed in an electric field and serialized so that the iron-based nanomagnetic particles are arranged in an orderly manner in the emulsion to prepare a nano-ordered silicon-based emulsion with excellent flexibility and chemical stability. At the same time, the orderly arranged iron-based nanomagnetic particles are the basis for the subsequent preparation of core particles with stable structure, controllable size and uniform distribution.

[0035] Example 3 The present embodiment provides a method for preparing a wear-resistant and corrosion-resistant rubber material for a pipe body of a pipe pile hole. In the method of the present embodiment, a supercritical fluid and a nano-ordered silicon-based emulsion are mixed into a mixed fluid under supercritical conditions, and the mixed fluid is pre-expanded and spray-granulated to obtain semi-solid nanoparticles. The semi-solid nanoparticles are heat-treated in stages in an inert gas environment to obtain core particles.

[0036] It should be noted that in the method of this embodiment, the particle size and distribution of the semi-solid nanoparticles can be controlled by adjusting the pre-expansion pressure, injection flow rate and stirring power parameters. For example, a higher pre-expansion pressure and a lower injection flow rate are helpful in preparing semi-solid nanoparticles with smaller particle sizes.

[0037] In this embodiment, the semi-solid particles are further controlled in particle size by heat treatment in stages, the particle surface structure is optimized, active sites are increased, surface reactivity and dispersibility are improved, the bonding strength with the coating material is enhanced, and agglomeration is avoided. The first heat treatment can initially solidify the structure of the semi-solid particles and enhance the mechanical strength, and the second heat treatment can further improve the crystallinity of the particles, significantly improve the hardness and wear resistance of the particles, and enhance the effect of their subsequent compounding with the rubber matrix.

[0038] Example 4 The present embodiment provides a method for preparing a wear-resistant and corrosion-resistant rubber material for a pipe pile hole forming pipe body. In the method of the present embodiment, after the core particles are obtained, the core particles are dispersed in a silicone solution, and the silicone is coated on the surface of the core particles by spray drying to obtain a reinforced symbiotic phase.

[0039] As an optional example, in this embodiment, the core particles are ultrasonically dispersed in an organosilicon solution with dimethylsiloxane as the silicon source according to a ratio to form a mixed slurry, the mixed slurry is sprayed into a drying tower through a centrifugal atomizer for drying, the dried material is cured in an inert gas environment, and the enhanced symbiotic phase is obtained after cooling to room temperature.

[0040] Example 5 The present embodiment provides a method for preparing a wear-resistant and corrosion-resistant rubber material for a pipe pile hole forming pipe body. In the method of the present embodiment, a reinforcing symbiotic phase is blended with a rubber matrix and then melt-extruded, and the molten extruded material is thermoformed to obtain a wear-resistant and corrosion-resistant rubber material for a pipe pile hole forming pipe body.

[0041] As an optional example, this embodiment uses hydrogenated nitrile rubber as the rubber matrix, and through comprehensive design of the ratio of the symbiotic phase to the rubber matrix, the temperature and time parameters of the melt extrusion, and the thermoforming parameters, the preparation and performance control of the wear-resistant and corrosion-resistant rubber material for the pipe body of the pipe pile hole are achieved.

[0042] This embodiment achieves synergistic enhancement of the reinforcing symbiotic phase and the rubber matrix by blending the reinforcing symbiotic phase with the hydrogenated nitrile rubber matrix. The addition of the reinforcing symbiotic phase significantly improves the wear resistance and corrosion resistance of the rubber material, while maintaining the excellent elasticity and processing properties of the rubber matrix. On the basis of the synergistic ratio of the components, the uniform dispersion of the reinforcing symbiotic phase in the rubber matrix is ​​achieved through the segmented melt extrusion process, avoiding performance defects caused by local overheating or uneven mixing, while ensuring the melting quality of the rubber material. The material after melt extrusion is quickly solidified and formed through a thermoforming process, so that the material maintains good fluidity and uniformity during the forming process, while further improving the density and wear and corrosion resistance of the material.

[0043] Example 6 This embodiment further describes in detail the method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe body of the pipe pile hole forming pipe of the present application.

[0044] In this embodiment, the method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body is implemented in the following manner: Silicone oil was used to modify the surface of nano-ferrite magnetic particles, and the surface-modified nano-ferrite magnetic particles were dispersed in a silicon-based emulsion whose silicon source was dimethylsiloxane to prepare a magnetic silicon-based emulsion. The magnetic silicon-based emulsion was placed in a magnetic field with a magnetic field strength of 0.28 T and magnetized for 8 minutes. The magnetized magnetic silicon-based emulsion was placed in an electric field of 15 kV / cm and serialized for 60 seconds to prepare a nano-ordered silicon-based emulsion.

[0045] Under supercritical conditions of critical temperature 31.2°C and critical pressure 8.28MPa, carbon dioxide is used as a supercritical fluid, and the supercritical fluid is mixed with the nano ordered silicon-based emulsion at a volume ratio of 2:1 to form a mixed fluid, and the mixed fluid is injected into a supercritical reactor at a temperature of 35°C and a pressure of 30MPa and stirred for 20 minutes at a stirring power of 30kW. In this embodiment, carbon dioxide is used as a supercritical fluid. Above the critical temperature and critical pressure, its density is close to that of a liquid, and its diffusivity is close to that of a gas. It has excellent solubility and dispersion capabilities for the nano ordered silicon-based emulsion. Under the supercritical state, the surface tension of the carbon dioxide supercritical fluid after mixing with the nano ordered silicon-based emulsion is close to zero, so that the nano ordered silicon-based emulsion is fully and evenly dispersed.

[0046] The mixed fluid is pre-expanded in a supercritical reactor at a temperature of 48°C and a pressure of 10MPa, and the pre-expanded mixed fluid is sprayed and granulated into semi-solid nanoparticles. During the spraying process, the supercritical carbon dioxide expands rapidly, the solvent in the mixed fluid is taken away, and the nanoparticles are quickly precipitated and semi-solidified into semi-solid nanoparticles. The semi-solid nanoparticles are collected in a collection kettle, and the residual solvent is removed by filtration and centrifugation.

[0047] In an inert gas environment, the semi-solid nanoparticles were subjected to a first heat treatment at 120° C.×40 min and a second heat treatment at 195° C.×30 min to obtain core particles with an average particle size of 10-59 nm.

[0048] The core particles are ultrasonically dispersed in an organosilicon solution with dimethylsiloxane as a silicon source at a weight ratio of 1:35 to form a mixed slurry, and the mixed slurry is sprayed into a drying tower with a temperature of 120°C and a relative humidity of 20% through a centrifugal atomizer at a flow rate of 15 mL / min for drying, and the dried material is cured at 200°C × 3h in an inert gas environment, and the enhanced symbiotic phase is obtained after cooling to room temperature. In practical applications, a temperature-controlled heater can be set at the air inlet of the drying tower to control the air inlet temperature at 150°C to improve the drying efficiency of the organosilicon solution after coating the core particles. The ratio of the core particles to the organosilicon solution in the mixed slurry, the injection flow rate of the centrifugal atomizer, and the temperature and relative humidity in the drying tower are the key to coating the organosilicon on the surface of the core particles in the embodiment method of the present application. It is not only closely related to the uniformity and continuity of the spray, but also jointly determines the coating rate, coating uniformity, coating thickness and coating stability of the organosilicon on the surface of the core particles.

[0049] The reinforcing symbiotic phase is blended with the hydrogenated nitrile rubber matrix in a weight ratio of 1:9.5 and then melt-extruded. The melt-extruded material is thermoformed at 182°C for 10 min under a pressure of 15 MPa to obtain a wear-resistant and corrosion-resistant rubber material for a pipe pile hole body. The melt extrusion includes a feeding section of 70°C for 6 min, a mixing section of 120°C for 11 min, a melting section of 150°C for 7 min and a homogenizing section of 150°C for 3 min.

[0050] Example 7 The particle size distribution of the core particles prepared in Example 6 of the present application was detected using a laser particle size analyzer of model Malvern Panalytical Mastersizer 3000. In this embodiment, the light source of the laser particle size analyzer is a helium-neon laser with a wavelength of 633 nm and a power of 4 mW, the detector is a multi-angle photon detector covering an angle of 0.02°-175°, and the measurement range is 0.001 µm-3500 µm. The dispersion system consists of an ultrasonic disperser with a power of 40 W and a frequency of 20 kHz and a mechanical stirrer with a rotation speed of 3000 r / min.

[0051] Figure 2 is a particle size distribution diagram of the core particles prepared according to Example 6 of the present application, such as Figure 2 As shown, the particle size distribution curve of the core particles prepared in Example 6 is unimodal, ranging from 10 nm to 59 nm, with a peak at 35 nm. The width of the curve is narrow, and the span value is less than 1.5. The core particles have high size consistency, and the average particle size is 35 nm. Figure 2 The particle size distribution curve shown in FIG. 1 shows that the specific surface area of ​​the core particles prepared in this embodiment is calculated to be 50-100 m 2 / g.

[0052] Depend on Figure 2 It can be seen that the preparation method of the embodiment of the present application effectively controls the size of the core particles, and the particle size is within the range of 10-59nm, so that the particles have a higher specific surface area and surface energy. Such nanoscale particles can form more interface contact points in the composite material, which can significantly improve its dispersibility and reinforcement effect in the composite material, thereby improving the overall performance of the material. The concentration and uniformity of the particle size distribution show that the preparation method of the present application can effectively control the growth and size dispersion of the particles, avoid excessive agglomeration and uneven size of the particles, avoid stress concentration and performance fluctuations caused by differences in particle size, and contribute to the subsequent coating uniformity, and further contribute to the subsequent enhancement of the uniform dispersion and enhanced synergy of the symbiotic phase in the rubber matrix.

[0053] The enhanced intergrowth phase prepared in Example 6 was observed using a high-resolution field emission scanning electron microscope (EOL JSM-7800F) with an acceleration voltage of 130 kV and a resolution better than 1.0 nm. During sample preparation, the enhanced intergrowth phase sample was fractured in liquid nitrogen, and after the fracture surface was exposed to air, a thin gold film (thickness of about 1020 nm) was plated on its surface using an ion sputtering apparatus (Quorum Q150T ES) to enhance conductivity and imaging quality. The gold-plated sample was mounted on a sample stage and placed in a SEM sample chamber. The acceleration voltage was adjusted to 10 kV, and the scanning parameters were optimized to obtain a clear surface morphology image.

[0054] Figure 3 This is a SEM morphology of the enhanced intergrowth phase prepared according to Example 6 of the present application, as shown Figure 3 As shown, the surface morphology of the enhanced intergrowth phase prepared in Example 6 of the present application is regular, the particles are spherical or nearly spherical, the surface is smooth, there are no obvious cracks or defects, the silicone coating is evenly distributed on the surface of the particles, the thickness is about 10-30nm, and there is no obvious coating layer fracture or discontinuous area, indicating that the preparation method of the present application example effectively achieves uniform coating of the core particles and avoids discontinuity and defects of the coating layer. The particle size distribution is uniform, which is consistent with the results of laser particle size analysis, further verifying the uniformity of the sample.

[0055] The structure of the enhanced intergrowth phase prepared in Example 6 of the present application was observed using a high-resolution transmission electron microscope of model FEI Tecnai G2 F20, with an acceleration voltage of 80-200 kV and a point resolution better than 0.23 nm. During sample preparation, the enhanced intergrowth phase sample was dispersed in ethanol, ultrasonically treated for 3 minutes to ensure uniform dispersion, and then a small amount of dispersion was dropped on a copper mesh, and the prepared copper mesh sample was mounted on a TEM sample rod and placed in a TEM sample chamber. The acceleration voltage was adjusted to 200 kV, the focus and contrast were optimized, and a high-resolution transmission image was obtained.

[0056] Figure 4 TEM structure diagram of the enhanced intergrowth phase prepared according to Example 6 of the present application, as shown Figure 4 As shown, in the enhanced symbiotic phase prepared in Example 6 of the present application, the silicone coating layer is uniformly covered on the surface of the core particles with a thickness of about 10-30 nm. The interface of the coating layer is clear and is tightly combined with the core particles without obvious gaps or stratification, providing a reliable structural basis for subsequent composite applications.

[0057] The enhanced intergrowth phase prepared in Example 6 of the present application was tested for thermal stability using a thermogravimetric analyzer (TGA) of model TA Instruments Q500. The detection range of the thermogravimetric analyzer is from room temperature to 1000°C, with an accuracy of 0.1µg, and it has the function of switching between nitrogen and air atmospheres, and the flow rate is adjustable. During the test, the sample was weighed and placed in the alumina crucible of the TGA and the initial mass was recorded. Nitrogen was filled at a flow rate of 50mL / min to provide atmosphere protection for the sample. The temperature was increased at a heating rate of 10°C / min, and the mass change of the sample during the heating process was recorded, and a curve of mass change with temperature was drawn in real time.

[0058] Figure 5 is the TGA curve of the enhanced intergrowth phase prepared according to Example 6 of the present application, such as Figure 5 As shown, the initial decomposition temperature (Td) of the enhanced intergrowth phase prepared in Example 6 is 300°C, the maximum weight loss rate temperature (Tmax) is 450°C, and the residual mass is 10% at 800°C. The initial decomposition temperature of the organosilicon coating layer of the enhanced intergrowth phase prepared in Example 6 is 300°C, indicating that its decomposition temperature is relatively high, and the temperature at which significant decomposition occurs is as high as 450°C, which has excellent thermal stability. At 800°C, the sample still has 10% residual mass, which is the undecomposed organosilicon component, indicating that in the enhanced intergrowth phase structure prepared in Example 6, the organosilicon forms a tight and extremely stable coating on the core particles.

[0059] The wear-resistant and corrosion-resistant rubber material for the pile hole pipe body prepared in Example 6 of the present application was tested for corrosion resistance using an ASTM standard corrosion test device. The corrosive media simulating actual working conditions in the test environment included 3.5% NaCl solution (simulated seawater), 10% H 2 SO 4 Solution (simulating acidic environment) and 10% NaOH solution (simulating alkaline environment). The test temperature is room temperature (25℃) and high temperature (60℃). After preparing the standard sample, record the initial mass, and soak each sample in 3.5% NaCl solution, 10% H 2 SO 4 Solution and 10% NaOH solution, 3 parallel samples were set for each solution, the test period was 7 days, the mass change of the sample was recorded every day, and the surface corrosion was observed. After the test, the sample was taken out, rinsed with deionized water, and weighed again after drying to measure the dimensional change.

[0060] Figure 6 The quality change curve of the wear-resistant and corrosion-resistant rubber material for the pile hole forming pipe body prepared according to Example 6 of the present application under various corrosion conditions. Figure 6As shown in the figure, in 3.5% NaCl solution, the mass change rate of the sample is less than 5%, indicating that the material has good salt spray corrosion resistance. 2 SO 4 In the solution, the mass change rate of the sample is less than 8%, indicating that the material has good stability in an acidic environment. In a 10% NaOH solution, the mass change rate of the sample is less than 7%, indicating that the material has good corrosion resistance in an alkaline environment.

[0061] The dimensional change rate of the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body prepared in Example 6 of the present application under various corrosion conditions is shown in Table 1 below.

[0062] Table 1

[0063] As shown in Table 1, under various corrosion conditions, the dimensional change rate of the wear-resistant and corrosion-resistant rubber material for the pipe pile hole body prepared in Example 6 was less than 3%, and the surface material had good corrosion resistance and dimensional stability.

[0064] The wear resistance of the wear-resistant and corrosion-resistant rubber material for the pipe pile hole pipe body prepared in Example 6 of the present application was tested using an Akron abrasion tester. A standard sample with a diameter of 25 mm and a thickness of 6 mm was prepared, and the wear of the sample was tested at a test pressure of 2.5 kg / cm2 and a test speed of 1.61 km / h for 60 minutes. A high-precision balance was used to weigh the mass of the sample before and after the test, and the wear was calculated. The wear of the wear-resistant and corrosion-resistant rubber material for the pipe pile hole pipe body prepared in Example 6 of the present application was less than 0.1 cm³ / 1.61 km, indicating that the material has excellent wear resistance.

[0065] The wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body prepared in Example 6 of the present application was tested for hardness using a Shore hardness tester, a standard sample with a thickness of 6 mm was prepared, 5 different positions of each sample were tested at room temperature, and the average value was taken as the final result. The hardness test data of the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body prepared in Example 6 of the present application is shown in Table 2 below.

[0066] Table 2

[0067] As shown in Table 2, the hardness of the wear-resistant and corrosion-resistant rubber material for the pipe pile hole body prepared in Example 6 of the present application is not less than 70±2HA, indicating that the material has good hardness.

[0068] An optical profilometer was used to measure the surface roughness of the wear-resistant and corrosion-resistant rubber material for the pipe pile drilling body prepared in Example 6 of the present application. A standard sample with a specification of 50 mm×50 mm×5 mm was prepared. The center area and a total of 5 positions around the sample were measured at room temperature, and the surface roughness of the sample was recorded. The hardness test data of the wear-resistant and corrosion-resistant rubber material for the pipe pile drilling body prepared in Example 6 of the present application is shown in Table 3 below.

[0069] Table 3

[0070] As shown in Table 3, the arithmetic mean roughness of the wear-resistant and corrosion-resistant rubber material for the pipe pile hole body prepared in Example 6 of the present application is no more than 0.5 µm at each position, and the maximum height roughness at each position is no more than 5 µm, indicating that the material has good smoothness.

[0071] Through comprehensive testing of the corrosion resistance, wear resistance, hardness and surface finish of the wear-resistant and corrosion-resistant rubber material for the pile hole pipe body prepared in the embodiment of the present application, it has excellent comprehensive performance under complex working conditions. The corrosion resistance test shows that the material exhibits good stability in a variety of corrosive media; the wear resistance test shows that the material has low wear and tear and is suitable for high wear environments; the hardness test confirms that the material has appropriate hardness and elasticity; the surface finish test shows that the material surface is smooth and suitable for high-precision applications. These performance indicators provide reliable technical guarantees for the practical application of the material.

[0072] The wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body and the preparation method thereof according to the present application have the following beneficial technical effects: 1. Significantly improve wear resistance: The nano-ordered silicon-based emulsion prepared by magnetization and serialization treatment, as well as the subsequent nano-reinforced symbiotic phase, significantly improves the wear resistance of the rubber matrix. The nano-reinforced phase forms a uniformly distributed reinforcement network in the rubber matrix, which effectively disperses the friction stress between the concrete and the rubber tube during the pore forming process, thereby extending the service life of the rubber tube.

[0073] 2. Significantly enhance the corrosion resistance: The magnetic silicon-based emulsion prepared by surface-modified iron-based nano-magnetic particles and the subsequent nano-ordered structure and the coating layer of the nano-reinforced phase can effectively block the chemical erosion of the rubber matrix by cement hydration products, significantly improving the corrosion resistance of the rubber material in an alkaline environment, thereby ensuring the integrity of the hole-forming pipe body during the concrete prefabrication process.

[0074] 3. Significantly improve surface hardness and smoothness: The introduction of nano-reinforced symbiotic phase improves the surface microstructure of the rubber matrix. The uniform distribution of the nano-reinforced phase makes the rubber tube exhibit a lower friction coefficient and higher surface flatness during the hole-forming process, significantly improving the surface hardness and smoothness of the material, thereby reducing the extraction resistance and improving the straightness and accuracy of the hole.

[0075] 4. Improve the quality and accuracy of hole making: By improving the wear resistance, corrosion resistance and surface properties, the hole making process is more stable, which can effectively avoid problems such as hole deviation and uneven hole wall. The improvement of hole making quality provides a better foundation for subsequent steel bar installation, grouting and other processes, and improves the overall structural performance of prefabricated pipe piles.

[0076] 5. Improve service application capabilities: The organic combination of the nano-enhanced symbiotic phase and the rubber matrix makes the rubber material not only have excellent wear and corrosion resistance, but also retains the elastic deformation characteristics of the rubber, which can meet the comprehensive performance requirements of the material in the process of pipe pile drilling, so that the rubber material can maintain stable performance in different construction environments and conditions, especially in complex chemical environments and high friction scenarios, showing good adaptability and reliability.

[0077] The wear-resistant and corrosion-resistant rubber material for the pipe pile drilling body and the preparation method thereof in the embodiments of the present application achieve performance optimization of the rubber material for the pipe pile drilling body, significantly improve its wear resistance, corrosion resistance, surface hardness and smoothness, effectively solve the deficiencies in the prior art, and provide a high-performance material solution for the drilling process of prefabricated pipe piles. The material is suitable for large-scale industrial production and has significant economic and social benefits.

[0078] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A method for preparing a wear-resistant and corrosion-resistant rubber material for a pipe pile hole body, characterized in that: The method comprises: subjecting magnetic silicon-based emulsion to magnetization and serialization treatment to prepare nano ordered silicon-based emulsion; molding the nano ordered silicon-based emulsion into core particles, coating the outer side of the core particles with a symbiotic shell layer to prepare an enhanced symbiotic phase; and thermally molding the enhanced symbiotic phase and a rubber matrix into a wear-resistant and corrosion-resistant rubber material for a pipe pile hole forming pipe body.

2. The method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body according to claim 1, characterized in that: The surface of the iron-based nano-magnetic particles is modified, the surface-modified iron-based nano-magnetic particles are dispersed in a silicon-based emulsion to prepare a magnetic silicon-based emulsion, and the magnetic silicon-based emulsion is placed in a magnetic field to magnetize the magnetic silicon-based emulsion.

3. The method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body according to claim 2, characterized in that: The iron-based nano-magnetic particles are one of nano-ferrite magnetic particles, nano-cobalt ferrite magnetic particles or nano-nickel ferrite magnetic particles. Silicone oil is used to modify the surface of the iron-based nano-magnetic particles. The silicon-based emulsion is prepared by constant-temperature emulsification of silicon-based raw materials and emulsifiers in deionized water. The silicon-based raw materials include dimethylsiloxane and its derivatives. The magnetic field intensity of the magnetization treatment is 0.28T and the time of the magnetization treatment is 8 minutes.

4. The method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body according to claim 1, characterized in that: The magnetic silicon-based emulsion after magnetization treatment is placed in an electric field of 15 kV / cm and subjected to sequencing treatment for 60 seconds to prepare a nano ordered silicon-based emulsion.

5. The method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body according to claim 1, characterized in that: A supercritical fluid and a nano ordered silicon-based emulsion are mixed under supercritical conditions to form a mixed fluid, the mixed fluid is pre-expanded and spray granulated to obtain semi-solid nanoparticles, and the semi-solid nanoparticles are heat treated in stages in an inert gas environment to obtain core particles.

6. The method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body according to claim 5, characterized in that: Under supercritical conditions of a critical temperature of 31.2°C and a critical pressure of 8.28MPa, carbon dioxide is used as a supercritical fluid, the supercritical fluid is mixed with a nano ordered silicon-based emulsion in a volume ratio of 2:1 to form a mixed fluid, the mixed fluid is injected into a supercritical reactor at a temperature of 35°C and a pressure of 30MPa and stirred at a stirring power of 30kW for 20min, the mixed fluid is pre-expanded in a supercritical reactor at a temperature of 48°C and a pressure of 10MPa, the pre-expanded mixed fluid is spray granulated to form semi-solid nanoparticles, and the semi-solid nanoparticles are subjected to a first heat treatment of 120°C×40min and a second heat treatment of 195°C×30min in an inert gas environment to obtain core particles with an average particle size of 10-59nm.

7. The method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body according to claim 1, characterized in that: The core particles are dispersed in an organosilicon solution, and the organosilicon is coated on the surface of the core particles by spray drying to obtain a reinforcing symbiotic phase.

8. The method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body according to claim 7, characterized in that: The core particles were ultrasonically dispersed in an organosilicon solution with dimethylsiloxane as the silicon source at a weight ratio of 1:35 to form a mixed slurry. The mixed slurry was sprayed into a drying tower with a temperature of 120°C and a relative humidity of 20% through a centrifugal atomizer at a flow rate of 15 mL / min for drying. The dried material was cured at 200°C for 3 h in an inert gas environment and cooled to room temperature to obtain a reinforced symbiotic phase.

9. The method for preparing the wear-resistant and corrosion-resistant rubber material for the pipe pile hole forming pipe body according to claim 1, characterized in that: The reinforcing symbiotic phase is blended with the rubber matrix in a weight ratio of 1:9.5 and then melt-extruded. The melt-extruded material is thermoformed at 182°C for 10 min under a pressure of 15 MPa to obtain a wear-resistant and corrosion-resistant rubber material for a pipe pile hole body. The melt extrusion includes a feeding section at 70°C for 6 min, a mixing section at 120°C for 11 min, a melting section at 150°C for 7 min and a homogenizing section at 150°C for 3 min, and the rubber matrix is ​​hydrogenated nitrile rubber.

10. A wear-resistant and corrosion-resistant rubber material for a pipe pile hole body, characterized in that: The material is prepared according to any one of claims 1-9.

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