CN115058074A - Special material for steel pipe lining for hot water pipe and preparation method thereof - Google Patents
Special material for steel pipe lining for hot water pipe and preparation method thereof Download PDFInfo
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- CN115058074A CN115058074A CN202210871190.9A CN202210871190A CN115058074A CN 115058074 A CN115058074 A CN 115058074A CN 202210871190 A CN202210871190 A CN 202210871190A CN 115058074 A CN115058074 A CN 115058074A
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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
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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
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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Abstract
The application relates to the technical field of special materials for steel pipe linings, and particularly discloses a special material for a steel pipe lining for a hot water pipe and a preparation method thereof. The special material for the steel pipe lining for the hot water pipe comprises the following raw materials in parts by weight: 50-70 parts of HDPE, 5-15 parts of PP, 10-20 parts of SEBS composite material, 10100.05-0.15 part of antioxidant, 1680.01-0.04 part of antioxidant, 0.018-0.058 part of calcium stearate, 0.05-0.09 part of PE wax, 0.05-0.15 part of silicone oil and 0.05-0.25 part of nucleating agent; the preparation method comprises the following steps: the raw materials are uniformly mixed, melted, extruded, cooled, granulated and dried to obtain the special material for the steel pipe lining for the hot water pipe. The special material for the steel pipe lining for the hot water pipe has the advantage of improving the wear resistance through the synergistic effect of the raw materials.
Description
Technical Field
The application relates to the technical field of special materials for steel pipe linings, in particular to a special material for a steel pipe lining for a hot water pipe and a preparation method thereof.
Background
The steel pipe inside lining is that an outside uses steel or stereoplasm structure as the pipeline skeleton, and anticorrosive and high temperature resistant resin of inside lining is as the backing layer, thereby has reduced pipeline transport medium through steel pipe inside lining self physics and chemical properties and has done that to the impact force of exterior structure etc. moreover because the cushioning effect of steel pipe inside lining, has prolonged the life of pipeline greatly, has reduced use cost.
At present, the steel pipe lining on the market mainly uses ultra-high molecular weight polyethylene as the main thing, and polyethylene has good tensile strength, but, because the hot-water line carries water for a long time, aquatic probably contains impurity, can cause the damage to the steel pipe lining, influences the life of hot-water line.
Disclosure of Invention
In order to improve the wear resistance of the steel pipe lining, the application provides a special material for the steel pipe lining for a hot water pipe and a preparation method thereof.
In a first aspect, the application provides a special material for a steel pipe lining for a hot water pipe, which adopts the following technical scheme:
the special material for the steel pipe lining for the hot water pipe comprises the following raw materials in parts by weight: 50-70 parts of HDPE, 5-15 parts of PP, 10-20 parts of SEBS composite material, 10100.05-0.15 part of antioxidant, 1680.01-0.04 part of antioxidant, 0.018-0.058 part of calcium stearate, 0.05-0.09 part of PE wax, 0.05-0.15 part of silicone oil and 0.05-0.25 part of nucleating agent; the SEBS composite material is prepared by modifying SEBS through nano silicon dioxide and multi-wall carbon nanotubes.
By adopting the technical scheme, the special material for the steel pipe lining for the hot water pipe not only improves the tensile yield strength, the elongation at break and the melt mass flow rate, but also improves the wear resistance through the synergistic effect of the raw materials, wherein the tensile yield strength is 16-38MPa, the elongation at break is 810-1200%, the melt mass flow rate is 0.22-0.52g/10min, and the mortar wear rate is 0.08-0.36%.
HDPE is the basic component of the steel pipe lining, has good tensile strength and hardness, and has good chemical stability. PP has good mechanical properties, wear resistance, chemical resistance and heat resistance. The SEBS composite material is prepared by modifying SEBS by adopting nano silicon dioxide and multi-walled carbon nanotubes, and firstly, the SEBS has good weather resistance, heat resistance, compression deformation resistance and excellent mechanical property; the nano silicon dioxide can improve the strength and chemical resistance of SEBS; the multi-wall carbon nano tube has loose and porous surface and adsorbability, can load nano silicon dioxide and improve the dispersibility of the nano silicon dioxide; the multi-walled carbon nanotube has excellent wear resistance, and the SEBS is modified by the nano-silicon dioxide and the multi-walled carbon nanotube, so that the mechanical strength and the wear resistance of the SEBS can be improved.
The antioxidant 1010 is a main antioxidant, the antioxidant 168 is an auxiliary antioxidant, and the antioxidant property of the special material for the steel pipe lining can be improved through the synergistic effect of the main antioxidant and the auxiliary antioxidant. The calcium stearate can be used as a waterproof agent and a plastic additive, and can improve the waterproofness of the special material for the steel pipe lining. PE wax can be used as a lubricant, and is convenient for forming and stripping the lining of the steel pipe. The silicone oil is used as a release agent to be applied to the raw material of the special material for the steel pipe lining, so that the release is convenient. The nucleating agent can accelerate crystallization rate, increase crystallization density, shorten molding period and improve mechanical property.
Preferably, the method comprises the following steps: the feed comprises the following raw materials in parts by weight: 58-62 parts of HDPE, 7-11 parts of PP, 12-18 parts of SEBS composite material, 10100.07-0.13 part of antioxidant, 1680.015-0.025 part of antioxidant, 0.0275-0.0475 part of calcium stearate, 0.065-0.085 part of PE wax, 0.08-0.12 part of silicone oil and 0.1-0.2 part of nucleating agent.
By adopting the technical scheme, the addition amount of the raw materials is optimized, so that the raw materials can play a role, and the wear resistance of the special material for the steel pipe lining can be improved.
Preferably, the method comprises the following steps: the SEBS composite material is prepared by adopting the following method:
s1: putting nano silicon dioxide into water, performing ultrasonic dispersion, adding a multi-walled carbon nanotube, uniformly mixing, filtering, and drying to obtain a product;
s2: and (4) mixing the product obtained in the step S1 with SEBS, melting, extruding and granulating to obtain the SEBS composite material.
Further, the SEBS composite material is prepared by the following method:
s1: putting nano silicon dioxide into water, performing ultrasonic dispersion for 20-30min, adding the multi-walled carbon nanotube, stirring for 10-20min, filtering, and drying to obtain a product;
s2: mixing the product obtained in the step S1 with SEBS, stirring for 20-30min, melting at the temperature of 150-170 ℃, extruding and granulating to obtain an SEBS composite material;
wherein the addition amount of water in each 1g of nano silicon dioxide is 6-8 mL; the weight ratio of the nano silicon dioxide to the multi-walled carbon nano tubes in the step S1 is 1: (1.2-1.4).
By adopting the technical scheme, the SEBS composite material is prepared by the preparation method, firstly, the nano-silicon dioxide is loaded on the multi-wall carbon nano-tube, so that the dispersibility of the nano-silicon dioxide is improved, then, the product is mixed with the SEBS, and the mixture is melted, extruded and granulated to obtain the SEBS composite material, so that the raw materials are uniformly mixed, and the raw materials can better play a role, and the wear resistance of the steel tube lining is further improved.
Preferably, the method comprises the following steps: the weight ratio of the product in the step S2 to the SEBS is (0.6-0.9): 1.
by adopting the technical scheme, the weight ratio of the product to the SEBS is limited, and the improvement of the wear resistance of the SEBS composite material is facilitated, so that the wear resistance of the special material for the steel pipe lining is improved.
Preferably, the method comprises the following steps: the nano silicon dioxide is pretreated by the following method before use: and (3) putting the nano-silica into an ethanol solution, uniformly mixing, adding a silane coupling agent, performing ultrasonic dispersion, then filtering, washing a solid, and drying to obtain the pretreated nano-silica.
Further, the nano-silica is pretreated by the following method before use: putting the nano silicon dioxide into an ethanol solution, stirring for 20-30min, adding a silane coupling agent, performing ultrasonic dispersion for 30-40min, then filtering, washing solids with water, and drying to obtain pretreated nano silicon dioxide;
wherein the addition amount of the ethanol solution in every 1g of nano-silica is 6-8mL, the mass fraction of the ethanol solution is 20%, and the weight ratio of the nano-silica to the silane coupling agent is 1: (0.4-0.6).
By adopting the technical scheme, the specific surface energy of the nano silicon dioxide is large, self agglomeration is easy to generate, the silane coupling agent is utilized to pretreat the nano silicon dioxide, the specific surface energy of the nano silicon dioxide is reduced, and the dispersibility of the nano silicon dioxide is improved, so that the nano silicon dioxide can better play a role, and the wear resistance of the special material for the steel pipe lining is further improved.
Preferably, the method comprises the following steps: the multi-walled carbon nanotubes are pretreated before use by the following method: and (3) putting the multi-walled carbon nano tube into a nitric acid solution, mixing, standing, taking out the multi-walled carbon nano tube, washing and drying to obtain the pretreated multi-walled carbon nano tube.
Further, the multi-walled carbon nanotube is pretreated by the following method before use: putting the multi-walled carbon nanotube into a nitric acid solution, stirring for 10-20min, standing for 1-2h, taking out the multi-walled carbon nanotube, washing with a sodium hydroxide solution, and drying to obtain a pretreated multi-walled carbon nanotube;
wherein the addition amount of the nitric acid solution in each 1g of the multi-wall carbon nano tube is 6-8mL, the mass fraction of the nitric acid solution is 10%, and the mass fraction of the sodium hydroxide solution is 10%.
By adopting the technical scheme, the multi-walled carbon nanotube is pretreated by using the nitric acid solution, so that impurities on the surface of the multi-walled carbon nanotube can be removed, the surface area of the multi-walled carbon nanotube can be increased, the adsorbability is enhanced, and the multi-walled carbon nanotube is better loaded with nano silicon dioxide, thereby further improving the wear resistance of the special material for the steel pipe lining.
Preferably, the method comprises the following steps: the special material for the steel pipe lining also comprises 5-12 parts by weight of glass fiber.
By adopting the technical scheme, the glass fiber has excellent mechanical property, and the glass can form firm mechanical combination between HDPE and PP macromolecules at present, so that the wear resistance of the special material for the steel pipe lining can be improved.
In a second aspect, the application provides a preparation method of a special material for a steel pipe lining for a hot water pipe, which adopts the following technical scheme:
a preparation method of a special material for a steel pipe lining for a hot water pipe comprises the following steps:
the special material for the steel pipe lining for the hot water pipe is prepared by uniformly mixing HDPE, PP and SEBS composite materials, an antioxidant 1010, an antioxidant 168, calcium stearate, PE wax, silicone oil and a nucleating agent, and performing melt extrusion, cooling, granulation and drying.
Further, the preparation method of the special material for the inner lining of the steel pipe for the hot water pipe comprises the following steps:
mixing HDPE, PP and SEBS composite materials, an antioxidant 1010, an antioxidant 168, calcium stearate, PE wax, silicone oil and a nucleating agent, stirring for 5-15min, melting at the temperature of 150-250 ℃, extruding, cooling, granulating and drying to obtain the special material for the steel pipe lining for the hot water pipe.
By adopting the technical scheme, various raw materials are mixed, and the preparation method is utilized to prepare the special material for the steel pipe lining, so that the raw materials are mixed more uniformly and can better play a role.
Preferably, the method comprises the following steps: the glass fiber is added simultaneously with the nucleating agent.
By adopting the technical scheme, the wear resistance of the special material for the steel pipe lining can be further improved by adding the glass fiber.
In summary, the present application includes at least one of the following beneficial technical effects:
1. because the SEBS composite material is adopted, the SEBS is prepared by modifying the nano silicon dioxide and the multi-walled carbon nano tubes, the wear resistance of the special material for the lining of the steel tube can be further improved by utilizing the synergistic effect between the nano silicon dioxide and the multi-walled carbon nano tubes, the tensile yield strength can reach 38MPa, the elongation at break can reach 1200%, the melt mass flow rate can reach 0.22g/10min, and the mortar wear rate can reach 0.08%.
2. In the application, the multi-wall carbon nano-tubes are preferably pretreated before use, so that the adsorbability of the multi-wall carbon nano-tubes is improved, and surface impurities are reduced; the nano silicon dioxide is pretreated before use, so that the dispersity of the nano silicon dioxide is improved, and the wear resistance of the special material for the steel pipe lining is improved conveniently.
Detailed Description
The present application is described in further detail below with reference to specific contents.
Raw materials
HDPE has relative density of 0.945-0.966 g/cm 3 Molecular weight 300000; the PP molecular weight is 100000; the density is 0.90-0.92 g/cm 3 (ii) a Nucleating agentIs calcium carbonate.
Preparation example
Preparation example 1
An SEBS composite material is prepared by adopting the following method:
s1: putting 4kg of nano silicon dioxide into water, performing ultrasonic dispersion for 25min, adding 5.2kg of multi-walled carbon nanotubes, stirring for 15min, filtering, and drying to obtain a product;
s2: mixing 1.2kg of the product obtained in the step S1 with 2kg of SEBS, stirring for 25min, melting at 160 ℃, extruding and granulating to obtain an SEBS composite material;
wherein the amount of water added per 1g of nanosilica is 7 mL.
Preparation example 2
An SEBS composite material is different from that of preparation example 1 in the addition amount of a product, the addition amount of the product in preparation example 2 is 1.5kg, and the balance is the same as that in preparation example 1.
Preparation example 3
An SEBS composite material is different from that of preparation example 1 in the addition amount of a product, the addition amount of the product in preparation example 3 is 1.8kg, and the rest is the same as that in preparation example 1.
Preparation example 4
An SEBS composite material is different from the SEBS composite material in preparation example 2 in that nano silicon dioxide is pretreated by the following method before being used, and the rest is the same as the SEBS composite material in preparation example 2:
putting the nano silicon dioxide into an ethanol solution with the mass fraction of 20%, stirring for 25min, adding a silane coupling agent, performing ultrasonic dispersion for 35min, then filtering, washing a solid with water, and drying to obtain pretreated nano silicon dioxide; wherein, the addition amount of the ethanol solution in each 1g of the nano silicon dioxide is 7mL, and the weight ratio of the nano silicon dioxide to the silane coupling agent is 1: 0.5.
preparation example 5
An SEBS composite material, which is different from the SEBS composite material in that the multi-wall carbon nano-tubes are pretreated by the following method before being used, and the rest is the same as the SEBS composite material in the preparation example 4:
putting the multi-walled carbon nano-tube into a nitric acid solution with the mass fraction of 10%, stirring for 15min, standing for 1.5h, then taking out the multi-walled carbon nano-tube, washing with a sodium hydroxide solution with the mass fraction of 10%, and drying to obtain a pretreated multi-walled carbon nano-tube; wherein the addition amount of the nitric acid solution in each 1g of the multi-wall carbon nano-tube is 7 mL.
Examples
Example 1
The special material for the steel pipe lining for the hot water pipe comprises the raw materials in the proportion shown in table 1.
A preparation method of a special material for a steel pipe lining for a hot water pipe comprises the following steps:
HDPE, PP, the SEBS composite material prepared in preparation example 1, an antioxidant 1010, an antioxidant 168, calcium stearate, PE wax, silicone oil and a nucleating agent are mixed, stirred for 10min, melted at the temperature of 200 ℃, extruded, cooled and dried to obtain the special material for the steel pipe lining for the hot water pipe.
Examples 2 to 5
The special material for the steel pipe lining for the hot water pipe is different from the material in the embodiment 1 in the raw material ratio shown in table 1.
TABLE 1 examples 1-5 blending amounts (unit: kg) of respective raw materials in the material for steel pipe inner liner
Examples 6 to 9
The special material for the steel pipe lining for the hot water pipe is different from the material in the embodiment 4 in the raw material ratio shown in table 2.
TABLE 2 examples 6-9 blending amounts (unit: kg) of respective raw materials in the material for steel pipe inner liners
| Raw materials | Example 6 | Example 7 | Example 8 | Example 9 |
| HDPE | 58 | 66 | 62 | 70 |
| PP | 7 | 9 | 11 | 15 |
| SEBS composite material | 18 | 18 | 18 | 18 |
| Antioxidant 1010 | 0.07 | 0.1 | 0.13 | 0.15 |
| Antioxidant 168 | 0.015 | 0.02 | 0.025 | 0.04 |
| Calcium stearate | 0.0275 | 0.0375 | 0.0475 | 0.058 |
| PE wax | 0.065 | 0.075 | 0.085 | 0.09 |
| Silicone oil | 0.08 | 0.1 | 0.12 | 0.15 |
| Nucleating agent | 0.1 | 0.15 | 0.2 | 0.25 |
Example 10
The material special for the steel pipe inner liner for the hot water pipe is different from the material in the embodiment 7 in that the source of the SEBS composite material in the raw material of the material special for the steel pipe inner liner is different, and the material is prepared by adopting the preparation embodiment 2.
Example 11
The material special for the steel pipe inner liner for the hot water pipe is different from the material in the embodiment 7 in that the source of the SEBS composite material in the raw material of the material special for the steel pipe inner liner is different, and the material is prepared by adopting the preparation embodiment 3.
Example 12
The material special for the steel pipe inner liner for the hot water pipe is different from the material in the embodiment 7 in the source of the SEBS composite material in the raw material of the material special for the steel pipe inner liner, and is prepared by adopting the preparation embodiment 4.
Example 13
The material special for the steel pipe inner liner for the hot water pipe is different from the material in the embodiment 7 in that the source of the SEBS composite material in the raw material of the material special for the steel pipe inner liner is different, and the material is prepared by adopting the preparation embodiment 5.
Examples 14 to 16
The material for the inner liner of the steel tube for the hot water tube is different from the material in the embodiment 13 in that the material for the inner liner of the steel tube also comprises glass fiber, the mixture ratio of the raw materials is shown in the table 3, and the preparation method is different, namely, the glass fiber is added together with the nucleating agent.
TABLE 3 examples 14-16 blending amounts (unit: kg) of respective raw materials in the material for steel pipe inner liners
| Raw materials | Example 14 | Example 15 | Example 16 |
| HDPE | 66 | 66 | 66 |
| PP | 9 | 9 | 9 |
| SEBS composite material | 18 | 18 | 18 |
| Antioxidant 1010 | 0.1 | 0.1 | 0.1 |
| Antioxidant 168 | 0.02 | 0.02 | 0.02 |
| Calcium stearate | 0.0375 | 0.0375 | 0.0375 |
| PE wax | 0.075 | 0.075 | 0.075 |
| Silicone oil | 0.1 | 0.1 | 0.1 |
| Nucleating agent | 0.15 | 0.15 | 0.15 |
| Glass fiber | 5 | 8 | 12 |
Comparative example
Comparative example 1
The special material for the steel pipe lining for the hot water pipe is different from the material in the embodiment 1 in that the SEBS composite material is not added in the special material for the steel pipe lining.
Comparative example 2
The special material for the steel pipe lining for the hot water pipe is different from the embodiment 1 in that the SEBS composite material in the special material for the steel pipe lining is replaced by SEBS in an equivalent amount.
Comparative example 3
The special material for the steel pipe lining for the hot water pipe is different from the material in the embodiment 1 in that the SEBS composite material in the special material for the steel pipe lining is prepared by the following method: and mixing 4kg of nano silicon dioxide and 2kg of SEBS, stirring for 25min, melting at 160 ℃, extruding and granulating to obtain the SEBS composite material.
Comparative example 4
The special material for the steel pipe lining for the hot water pipe is different from the material in the embodiment 1 in that the SEBS composite material in the special material for the steel pipe lining is prepared by the following method: and mixing 5.2kg of multi-walled carbon nanotubes and 2kg of SEBS, stirring for 25min, melting at 160 ℃, extruding and granulating to obtain the SEBS composite material.
Performance test
The following property tests were carried out on the special material for the inner liner of the steel pipe for a hot water pipe in examples 1 to 16 and comparative examples 1 to 4:
tensile yield strength: the tensile yield strength of the steel pipe lining material was measured according to Q31/0115000199C002-2015, which is a material special for steel pipe lining for hot water pipe, and the measurement results are shown in Table 4.
Elongation at break: the elongation at break of the steel pipe lining material was measured according to Q31/0115000199C002-2015, which is a material special for steel pipe lining for hot water pipe, and the measurement results are shown in Table 4.
Melt mass flow rate: the melt mass flow rate of the steel pipe lining material was measured in accordance with Q31/0115000199C002-2015, which is a material special for steel pipe lining for hot water pipe, and the measurement results are shown in Table 4.
The mortar wear rate is as follows: the mortar wear rate of the special material for the steel pipe lining is measured according to QB/T2668-2004 'ultra-high molecular weight polyethylene pipe', and the detection results are shown in Table 4.
TABLE 4 test results
As can be seen from Table 4, the special material for the steel pipe lining for the hot water pipe not only improves the tensile yield strength, the elongation at break and the melt mass flow rate, but also improves the wear resistance through the synergistic effect of the raw materials, wherein the tensile yield strength is 16-38MPa, the elongation at break is 810-1200%, the melt mass flow rate is 0.22-0.52g/10min, and the mortar wear rate is 0.08-0.36%.
It can be seen by combining example 1 and comparative examples 1-2 that the tensile yield strength in example 1 is 16MPa, the elongation at break is 810%, the melt mass flow rate is 0.52g/10min, and the mortar wear rate is 0.36%, which is superior to that in comparative examples 1-2, indicating that the use of the SEBS composite material in the special material for steel pipe linings is more suitable, and not only can the special material for steel pipe linings have excellent tensile yield strength and elongation at break, but also can reduce the mortar wear rate and improve the wear resistance.
By combining the example 1 and the comparative examples 3 to 4, the tensile yield strength of the SEBS composite material in the example 1 is 16MPa, the elongation at break is 810%, the melt mass flow rate is 0.52g/10min, and the mortar wear rate is 0.36%, which is superior to that in the comparative examples 3 to 4, and shows that the SEBS composite material is more suitable for modifying the SEBS by adopting the nano silicon dioxide and the multi-wall carbon nanotubes, so that the special material for the steel pipe lining has excellent tensile yield strength and elongation at break, the mortar wear rate can be reduced, and the wear resistance is improved.
It can be seen by combining examples 1-5 that the tensile yield strength in example 4 is 21MPa, the elongation at break is 900%, the melt mass flow rate is 0.41g/10min, and the mortar wear rate is 0.26%, which is superior to other examples, and shows that the addition amount of the SEBS composite material in example 4 is more appropriate, so that the special material for the steel pipe lining has excellent tensile yield strength and elongation at break, the mortar wear rate can be reduced, and the wear resistance can be improved.
It can be seen by combining examples 6-9 that the change of the addition amount of other raw materials except the SEBS composite material in the special material for the steel pipe lining has little influence on the performance of the special material.
It can be seen by combining example 7 and examples 10-13 that the tensile yield strength in example 13 is 33MPa, the elongation at break is 1065%, the melt mass flow rate is 0.29g/10min, and the mortar wear rate is 0.13%, which is superior to other examples, indicating that the SEBS composite material prepared by using preparation example 5 is more suitable, and not only can the special material for steel pipe linings have excellent tensile yield strength and elongation at break, but also can reduce the mortar wear rate and improve the wear resistance.
It can be seen from the combination of examples 13-16 that the tensile yield strength in example 16 is 38MPa, the elongation at break is 1200%, the melt mass flow rate is 0.22g/10min, and the mortar wear rate is 0.06%, which is superior to other examples, indicating that the addition of glass fiber to the steel pipe lining raw material is more suitable, and can further improve the mechanical properties and wear resistance of the steel pipe lining special-purpose material.
The embodiments of the present invention are preferred embodiments of the present application, and the scope of the present application is not limited by the embodiments of the present application, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The special material for the steel pipe lining for the hot water pipe is characterized in that: the feed comprises the following raw materials in parts by weight: 50-70 parts of HDPE, 5-15 parts of PP, 10-20 parts of SEBS composite material, 10100.05-0.15 part of antioxidant, 1680.01-0.04 part of antioxidant, 0.018-0.058 part of calcium stearate, 0.05-0.09 part of PE wax, 0.05-0.15 part of silicone oil and 0.05-0.25 part of nucleating agent; the SEBS composite material is prepared by modifying SEBS through nano silicon dioxide and multi-wall carbon nanotubes.
2. The special material for the steel pipe lining of the hot water pipe as claimed in claim 1, wherein: the feed comprises the following raw materials in parts by weight: 58-62 parts of HDPE, 7-11 parts of PP, 12-18 parts of SEBS composite material, 10100.07-0.13 part of antioxidant, 1680.015-0.025 part of antioxidant, 0.0275-0.0475 part of calcium stearate, 0.065-0.085 part of PE wax, 0.08-0.12 part of silicone oil and 0.1-0.2 part of nucleating agent.
3. The special material for the steel pipe lining of the hot water pipe as claimed in claim 1, wherein: the SEBS composite material is prepared by adopting the following method:
s1: putting nano silicon dioxide into water, performing ultrasonic dispersion, adding a multi-walled carbon nanotube, uniformly mixing, filtering, and drying to obtain a product;
s2: and (4) mixing the product obtained in the step S1 with SEBS, melting, extruding and granulating to obtain the SEBS composite material.
4. The special material for the steel pipe lining of the hot water pipe as claimed in claim 3, wherein: the weight ratio of the product in the step S2 to the SEBS is (0.6-0.9): 1.
5. the material special for the steel pipe lining of the hot water pipe as claimed in claim 3, wherein: the nano silicon dioxide is pretreated by the following method before use: and (2) putting the nano silicon dioxide into an ethanol solution, uniformly mixing, adding a silane coupling agent, performing ultrasonic dispersion, then filtering, washing solids, and drying to obtain the pretreated nano silicon dioxide.
6. The material special for the steel pipe lining of the hot water pipe as claimed in claim 3, wherein: the multi-walled carbon nanotubes are pretreated before use by the following method: and (3) putting the multi-walled carbon nano tube into a nitric acid solution, mixing, standing, taking out the multi-walled carbon nano tube, washing and drying to obtain the pretreated multi-walled carbon nano tube.
7. The special material for the steel pipe lining of the hot water pipe as claimed in claim 1, wherein: the special material for the steel pipe lining also comprises 5-12 parts by weight of glass fiber.
8. A method for preparing the special material for the inner liner of the steel pipe for the hot water pipe as claimed in any one of claims 1 to 7, comprising the steps of:
the HDPE, PP and SEBS composite material, the antioxidant 1010, the antioxidant 168, calcium stearate, PE wax, silicone oil and a nucleating agent are uniformly mixed, and the special material for the steel pipe lining for the hot water pipe is obtained by melt extrusion, cooling, granulation and drying.
9. The method for preparing the material special for the inner liner of the steel pipe for the hot water pipe as claimed in claim 8, wherein the method comprises the following steps: the glass fiber is added simultaneously with the nucleating agent.
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