CN111378217A - Anti-tensile geocell material and preparation method thereof - Google Patents
Anti-tensile geocell material and preparation method thereof Download PDFInfo
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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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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C08L2201/00—Properties
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Abstract
The invention discloses an anti-tensile geocell material which is prepared from the following raw materials in parts by weight: high density polyethylene: 50-90 parts of ethylene propylene diene monomer: 10-30 parts of ethylene-vinyl acetate copolymer: 5-20 parts of nano reinforcing filler: 5-10 parts of an interfacial compatilizer: 1-8 parts of a processing aid: 0.3-1 part; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: (5.5-7.8): (13-16.5): (3-4.5); the nano-fibers are nano-carbon fibers. The anti-tensile geocell material disclosed by the invention is high in tensile strength, good in anti-tensile property, high in cantilever beam notch impact strength, good in impact resistance, large in bending modulus and good in comprehensive mechanical property; low-temperature brittleness point and good low-temperature resistance; high thermal deformation temperature under load and good high temperature resistance.
Description
Technical Field
The invention relates to the technical field of functional polymer materials, in particular to an anti-tensile geocell material and a preparation method thereof.
Background
The geocell is a geosynthetic material with a three-dimensional net structure and a unique three-dimensional structure, can effectively restrain fillers in grids, forms a stable structure layer together with the fillers, shows the engineering effect which cannot be achieved by other planar geosynthetic materials, and is widely applied to the engineering of reinforcing weak roadbed, protecting side slope, building retaining wall and the like.
The polyolefin geocell product is a geosynthetic material which is formed by extrusion molding, slitting and ultrasonic welding of modified polyolefin serving as a raw material and is in a three-dimensional honeycomb structure after being unfolded. Due to the characteristics of long production process, multiple forming procedures, complex and changeable application environment and the like of the geocell, the raw materials for producing the product and the product have the following requirements.
(1) The product has better mechanical property, so that the product is prevented from being damaged by stronger external force, hard object puncture and the like in the construction process and the application process.
(2) The product is used in a complex environment for a long time, and factors such as acid and alkali resistance, mildew resistance and the like are considered when selecting materials.
(3) The material should have good anti-aging performance so as to meet the requirement of long-term stable use in engineering.
(4) The material used by the product has better low and high temperature resistance for the applicability of the use in the south and north.
(5) In order to meet the requirements of the preparation process of the geocell, the material also needs to have better weldability.
(6) The product is required to be neat in overall dimension, consistent in welding distance and consistent in strength of the whole grid system in engineering application.
(7) The product has better component connection function, so as to ensure the consistency of the overall reinforcing strength of the engineering.
However, the polyolefin geocell materials currently used have the following problems:
1. the tensile strength is low, and the tensile resistance is poor;
2. the cantilever beam notch has lower impact strength, smaller bending modulus and poor comprehensive mechanical property (poor physical and mechanical properties);
3. poor low temperature resistance; the high temperature resistance is poor;
in conclusion, the polyolefin geocell material used at present has poor comprehensive use performance, is easy to damage, has limited use environment and short service life.
Based on the situation, the invention provides an anti-tensile geocell material and a preparation method thereof, and the problems can be effectively solved.
Disclosure of Invention
The invention aims to provide a stretch-resistant geocell material and a preparation method thereof. The anti-tensile geocell material disclosed by the invention is high in tensile strength, good in anti-tensile property, high in cantilever beam notch impact strength, good in impact resistance, large in bending modulus and good in comprehensive mechanical property; low-temperature brittleness point and good low-temperature resistance; the thermal deformation temperature under load is high, and the high temperature resistance is good; in addition, the stretching-resistant geocell material is welded through ultrasonic needles to form a cell system with a three-dimensional net structure, the structural system can stretch out and draw back freely and can be folded in the transportation process, the structural system can be stretched into a three-dimensional grid with a honeycomb structure in the construction process, and materials such as concrete, broken stone, residues and soil are filled into the three-dimensional grid, so that a structural body with rigidity and strong lateral limiting force is formed, the structural body has the characteristics of good mechanical property, terrain adaptability, long-term durability, environmental friendliness and the like, and is widely applied to the aspects of slope protection, roadbed stabilization, river channel treatment, water and soil conservation, ecological restoration and the like.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a tensile geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 50-90 parts of ethylene propylene diene monomer: 10-30 parts of ethylene-vinyl acetate copolymer: 5-20 parts of nano reinforcing filler: 5-10 parts of an interfacial compatilizer: 1-8 parts of a processing aid: 0.3-1 part; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: (5.5-7.8): (13-16.5): (3-4.5); the nano-fibers are nano-carbon fibers. The stretch-resistant geocell material is prepared by selecting raw materials, optimizing the content of each raw material, and selecting high-density polyethylene, ethylene propylene diene monomer, ethylene-vinyl acetate copolymer, nano reinforced filler, interface compatilizer and processing aid in proper proportion; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: 6.5: 14.5: 3.7; the nano-fibers are nano-carbon fibers; the advantages of all raw materials are fully exerted, the raw materials are mutually supplemented and mutually promoted, the use types of the raw materials are reduced, the raw material cost is optimized, the quality stability of the product is improved, and the prepared stretch-resistant geocell material is high in tensile strength, good in stretch resistance, high in cantilever beam notch impact strength, good in impact resistance, large in bending modulus and good in comprehensive mechanical property; low-temperature brittleness point and good low-temperature resistance; the thermal deformation temperature under load is high, and the high temperature resistance is good; in addition, the stretching-resistant geocell material is welded through ultrasonic needles to form a cell system with a three-dimensional net structure, the structural system can stretch out and draw back freely and can be folded in the transportation process, the structural system can be stretched into a three-dimensional grid with a honeycomb structure in the construction process, and materials such as concrete, broken stone, residues and soil are filled into the three-dimensional grid, so that a structural body with rigidity and strong lateral limiting force is formed, the structural body has the characteristics of good mechanical property, terrain adaptability, long-term durability, environmental friendliness and the like, and is widely applied to the aspects of slope protection, roadbed stabilization, river channel treatment, water and soil conservation, ecological restoration and the like.
The tensile geocell material takes high-density polyethylene as a main raw material, and the hardness, tensile strength and creep property of the tensile geocell material are superior to those of low-density polyethylene; the wear resistance, the electrical insulation, the toughness and the cold resistance are good; the chemical stability is good, and the paint is not dissolved in any organic solvent at room temperature, and is resistant to corrosion of acid, alkali and various salts;
the invention introduces the ethylene propylene diene monomer with a proper proportion, is matched with the interface compatilizer and the processing aid, has good identity with other components such as high-density polyethylene and the like, can well form a uniform material, can improve the toughness and the flexibility of the anti-stretching geocell material, greatly improves the mechanical properties such as the tensile strength, the cantilever beam notch impact strength and the like of the anti-stretching geocell material, can greatly improve the low-temperature resistance of the anti-stretching geocell material after being added, and ensures that the anti-stretching geocell material has high tensile strength and cantilever beam notch impact strength in a low-temperature environment;
the invention introduces ethylene-vinyl acetate copolymer with proper proportion, matches with interface compatilizer and processing aid, has good sameness with other components such as ethylene propylene diene monomer, high density polyethylene and the like, can well form uniform materials, particularly can improve the dispersion effect of the nano reinforced filler in ethylene-vinyl acetate copolymer, ethylene propylene diene monomer, high density polyethylene and the like, and can also improve the flexibility and reduce the brittleness of the stretch-resistant geocell material, thereby greatly improving the mechanical properties such as tensile strength, cantilever beam notch impact strength and the like of the stretch-resistant geocell material, and further improving the low temperature resistance of the stretch-resistant geocell material;
the invention introduces nano reinforcing filler with proper proportion, wherein the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fiber, and the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica is 10: 6.5: 14.5: 3.7; the nano-fibers are nano-carbon fibers; the composite filler can be well and uniformly dispersed in the raw material system, and the nano calcium carbonate, the nano barium sulfate, the nano mica and the nano fiber are matched with each other to mainly play a good synergistic enhancement role, so that the mechanical properties of the tensile geocell material, such as tensile strength, cantilever beam notch impact strength, bending modulus and the like, are greatly improved, and the enhancement effect is obviously improved compared with that of singly using one nano enhanced filler.
Preferably, the tensile geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 65-75 parts of ethylene propylene diene monomer: 18-24 parts of ethylene-vinyl acetate copolymer: 10-14 parts of nano reinforcing filler: 6-8 parts of an interfacial compatilizer: 4-6 parts of a processing aid: 0.55-0.75 parts; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: (6-7): (13.8-15.2): (3.3-4); the nano-fibers are nano-carbon fibers.
Preferably, the tensile geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 70 parts of ethylene propylene diene monomer: 21 parts of ethylene-vinyl acetate copolymer: 12 parts of nano reinforcing filler: 7 parts of an interfacial compatilizer: 5 parts, processing aid: 0.65 part; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: 6.5: 14.5: 3.7; the nano-fibers are nano-carbon fibers.
Preferably, the high-density polyethylene resin is Daqing petrochemical 5000S; the ethylene-vinyl acetate copolymer is Hanhua 1826.
Preferably, the interfacial compatilizer is PE grafted maleic anhydride.
Preferably, the processing aid is a mixture of ethylene bis stearamide and calcium stearate.
Preferably, the mass ratio of the ethylene bis stearamide to the calcium stearate in the mixture of the ethylene bis stearamide and the calcium stearate is 1: 0.3-0.45.
Preferably, the tensile geocell material further comprises the following raw materials in parts by weight: toner: 0.8-2 parts.
The invention also provides a preparation method of the stretch-resistant geocell material, which comprises the following steps:
A. respectively weighing raw materials of the anti-tensile geocell material for later use;
B. fully and uniformly mixing the raw materials except the nano reinforced filler by using a high-speed mixer for 3-5min to obtain a mixture;
C. melt extrusion: and feeding the mixture into a double-screw extruder, adding the nano reinforced filler into the double-screw extruder from a forced feeding device at the middle section of the double-screw extruder, and performing melt extrusion and granulation to obtain the stretch-resistant geocell material.
The nano reinforced filler is added from a forced feeding device at the middle section of the double-screw extruder, so that the effective melting and mixing length of the nano reinforced filler is effectively ensured, the nano reinforced filler is better and uniformly dispersed in the stretch-resistant geocell material, and the properties of stretch resistance and the like of the stretch-resistant geocell material are ensured.
In the extrusion process, technological conditions such as the rotating speed of a main engine, the speed ratio of the feeding speed (frequency) and the like are adjusted, so that the stretch-resistant geocell material is extruded and granulated uniformly and smoothly.
Preferably, in step C, the parameters of the twin-screw extruder are set as follows: the temperature of the first zone is 170-180 ℃, the temperature of the second zone is 175-180 ℃, the temperature of the third zone is 175-180 ℃, the temperature of the fourth zone is 180-190 ℃, the temperature of the fifth zone is 180-190 ℃, the temperature of the sixth zone is 180-190 ℃, the temperature of the seventh zone is 195-200 ℃, the temperature of the eighth zone is 195-200 ℃, the temperature of the ninth zone is 195-200 ℃, the temperature of the head is 205-210 ℃, the rotating speed of the host machine is 280-300r/min, and the feeding frequency is 13-20 HZ.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the stretch-resistant geocell material is prepared by selecting raw materials, optimizing the content of each raw material, and selecting high-density polyethylene, ethylene propylene diene monomer, ethylene-vinyl acetate copolymer, nano reinforced filler, interface compatilizer and processing aid in proper proportion; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: 6.5: 14.5: 3.7; the nano-fibers are nano-carbon fibers; the advantages of all raw materials are fully exerted, the raw materials are mutually supplemented and mutually promoted, the use types of the raw materials are reduced, the raw material cost is optimized, the quality stability of the product is improved, and the prepared stretch-resistant geocell material is high in tensile strength, good in stretch resistance, high in cantilever beam notch impact strength, good in impact resistance, large in bending modulus and good in comprehensive mechanical property; low-temperature brittleness point and good low-temperature resistance; the thermal deformation temperature under load is high, and the high temperature resistance is good; in addition, the stretching-resistant geocell material is welded through ultrasonic needles to form a cell system with a three-dimensional net structure, the structural system can stretch out and draw back freely and can be folded in the transportation process, the structural system can be stretched into a three-dimensional grid with a honeycomb structure in the construction process, and materials such as concrete, broken stone, residues and soil are filled into the three-dimensional grid, so that a structural body with rigidity and strong lateral limiting force is formed, the structural body has the characteristics of good mechanical property, terrain adaptability, long-term durability, environmental friendliness and the like, and is widely applied to the aspects of slope protection, roadbed stabilization, river channel treatment, water and soil conservation, ecological restoration and the like.
The tensile geocell material takes high-density polyethylene as a main raw material, and the hardness, tensile strength and creep property of the tensile geocell material are superior to those of low-density polyethylene; the wear resistance, the electrical insulation, the toughness and the cold resistance are good; the chemical stability is good, and the paint is not dissolved in any organic solvent at room temperature, and is resistant to corrosion of acid, alkali and various salts;
the invention introduces the ethylene propylene diene monomer with a proper proportion, is matched with the interface compatilizer and the processing aid, has good identity with other components such as high-density polyethylene and the like, can well form a uniform material, can improve the toughness and the flexibility of the anti-stretching geocell material, greatly improves the mechanical properties such as the tensile strength, the cantilever beam notch impact strength and the like of the anti-stretching geocell material, can greatly improve the low-temperature resistance of the anti-stretching geocell material after being added, and ensures that the anti-stretching geocell material has high tensile strength and cantilever beam notch impact strength in a low-temperature environment;
the invention introduces ethylene-vinyl acetate copolymer with proper proportion, matches with interface compatilizer and processing aid, has good sameness with other components such as ethylene propylene diene monomer, high density polyethylene and the like, can well form uniform materials, particularly can improve the dispersion effect of the nano reinforced filler in ethylene-vinyl acetate copolymer, ethylene propylene diene monomer, high density polyethylene and the like, and can also improve the flexibility and reduce the brittleness of the stretch-resistant geocell material, thereby greatly improving the mechanical properties such as tensile strength, cantilever beam notch impact strength and the like of the stretch-resistant geocell material, and further improving the low temperature resistance of the stretch-resistant geocell material;
the invention introduces nano reinforcing filler with proper proportion, wherein the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fiber, and the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica is 10: 6.5: 14.5: 3.7; the nano-fibers are nano-carbon fibers; the composite filler can be well and uniformly dispersed in the raw material system, and the nano calcium carbonate, the nano barium sulfate, the nano mica and the nano fiber are matched with each other to mainly play a good synergistic enhancement role, so that the mechanical properties of the tensile geocell material, such as tensile strength, cantilever beam notch impact strength, bending modulus and the like, are greatly improved, and the enhancement effect is obviously improved compared with that of singly using one nano enhanced filler.
The invention introduces an interfacial compatilizer with a proper proportion, and preferably, the interfacial compatilizer is PE grafted maleic anhydride. For the raw material system of the invention, the PE grafted maleic anhydride can enable all raw materials to be better compatible and form a uniform material, thereby ensuring the service performance of the product.
The invention introduces a processing aid with proper proportion, and preferably, the processing aid is a mixture of ethylene bis stearamide and calcium stearate. Preferably, the mass ratio of the ethylene bis stearamide to the calcium stearate in the mixture of the ethylene bis stearamide and the calcium stearate is 1: 0.3-0.45. The processing aid, ethylene bis stearamide, mainly plays a good lubricating role, and improves the processing performance; the calcium stearate has the auxiliary lubricating effect, improves the processing performance, mainly plays a good thermal stabilizing role and improves the thermal stability in the processing process; the two are mutually matched, so that the performance of the product is ensured, the use of the small-molecule assistant is reduced, and the small-molecule assistant is separated out and reduced in the use process of the stretch-resistant geocell material, so that the use performance of the product is ensured, and the service life is prolonged.
The preparation method has simple process and simple and convenient operation, and saves manpower and equipment cost.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.
The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
Example 1:
a tensile geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 50-90 parts of ethylene propylene diene monomer: 10-30 parts of ethylene-vinyl acetate copolymer: 5-20 parts of nano reinforcing filler: 5-10 parts of an interfacial compatilizer: 1-8 parts of a processing aid: 0.3-1 part; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: (5.5-7.8): (13-16.5): (3-4.5); the nano-fibers are nano-carbon fibers.
Preferably, the tensile geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 65-75 parts of ethylene propylene diene monomer: 18-24 parts of ethylene-vinyl acetate copolymer: 10-14 parts of nano reinforcing filler: 6-8 parts of an interfacial compatilizer: 4-6 parts of a processing aid: 0.55-0.75 parts; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: (6-7): (13.8-15.2): (3.3-4); the nano-fibers are nano-carbon fibers.
Preferably, the tensile geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 70 parts of ethylene propylene diene monomer: 21 parts of ethylene-vinyl acetate copolymer: 12 parts of nano reinforcing filler: 7 parts of an interfacial compatilizer: 5 parts, processing aid: 0.65 part; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: 6.5: 14.5: 3.7; the nano-fibers are nano-carbon fibers.
Preferably, the high-density polyethylene resin is Daqing petrochemical 5000S; the ethylene-vinyl acetate copolymer is Hanhua 1826.
Preferably, the interfacial compatilizer is PE grafted maleic anhydride.
Preferably, the processing aid is a mixture of ethylene bis stearamide and calcium stearate.
Preferably, the mass ratio of the ethylene bis stearamide to the calcium stearate in the mixture of the ethylene bis stearamide and the calcium stearate is 1: 0.3-0.45.
Preferably, the tensile geocell material further comprises the following raw materials in parts by weight: toner: 0.8-2 parts.
The invention also provides a preparation method of the stretch-resistant geocell material, which comprises the following steps:
A. respectively weighing raw materials of the anti-tensile geocell material for later use;
B. fully and uniformly mixing the raw materials except the nano reinforced filler by using a high-speed mixer for 3-5min to obtain a mixture;
C. melt extrusion: and feeding the mixture into a double-screw extruder, adding the nano reinforced filler into the double-screw extruder from a forced feeding device at the middle section of the double-screw extruder, and performing melt extrusion and granulation to obtain the stretch-resistant geocell material.
Preferably, in step C, the parameters of the twin-screw extruder are set as follows: the temperature of the first zone is 170-180 ℃, the temperature of the second zone is 175-180 ℃, the temperature of the third zone is 175-180 ℃, the temperature of the fourth zone is 180-190 ℃, the temperature of the fifth zone is 180-190 ℃, the temperature of the sixth zone is 180-190 ℃, the temperature of the seventh zone is 195-200 ℃, the temperature of the eighth zone is 195-200 ℃, the temperature of the ninth zone is 195-200 ℃, the temperature of the head is 205-210 ℃, the rotating speed of the host machine is 280-300r/min, and the feeding frequency is 13-20 HZ.
Example 2:
a tensile geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 65 parts of ethylene propylene diene monomer: 18 parts of ethylene-vinyl acetate copolymer: 10 parts of nano reinforcing filler: 6 parts of an interfacial compatilizer: 4 parts, processing aid: 0.55 part; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: 6: 13.8: 3.3; the nano-fibers are nano-carbon fibers.
In this embodiment, the high density polyethylene resin is Daqing petrochemical 5000S; the ethylene-vinyl acetate copolymer is Hanhua 1826.
In this embodiment, the interfacial compatibilizer is PE grafted maleic anhydride.
In this embodiment, the processing aid is a mixture of ethylene bis stearamide and calcium stearate.
In this embodiment, the mass ratio of ethylene bis stearamide to calcium stearate in the mixture of ethylene bis stearamide and calcium stearate is 1: 0.3.
in this embodiment, the stretch-resistant geocell material further comprises the following raw materials in parts by weight: toner: 0.8 part.
In this embodiment, the preparation method of the stretch-resistant geocell material includes the following steps:
A. respectively weighing raw materials of the anti-tensile geocell material for later use;
B. fully and uniformly mixing the raw materials except the nano reinforced filler by using a high-speed mixer for 3min to obtain a mixture;
C. melt extrusion: and feeding the mixture into a double-screw extruder, adding the nano reinforced filler into the double-screw extruder from a forced feeding device at the middle section of the double-screw extruder, and performing melt extrusion and granulation to obtain the stretch-resistant geocell material.
In this example, in step C, the parameters of the twin-screw extruder were set as: the temperature of the first zone is 170 ℃, the temperature of the second zone is 175 ℃, the temperature of the third zone is 175 ℃, the temperature of the fourth zone is 180 ℃, the temperature of the fifth zone is 180 ℃, the temperature of the sixth zone is 180 ℃, the temperature of the seventh zone is 195 ℃, the temperature of the eighth zone is 195 ℃, the temperature of the ninth zone is 195 ℃, the temperature of the machine head is 205 ℃, the rotating speed of the main machine is 280r/min, and the feeding frequency is 13 HZ.
Example 3:
a tensile geocell material is prepared from the following raw materials in parts by weight:
in this embodiment, the stretch-resistant geocell material is made from the following raw materials in parts by weight:
high density polyethylene: 75 parts of ethylene propylene diene monomer: 24 parts of ethylene-vinyl acetate copolymer: 14 parts of nano reinforcing filler: 8 parts, interface compatilizer: 6 parts, processing aid: 0.75 part; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: 7: 15.2: 4; the nano-fibers are nano-carbon fibers.
In this embodiment, the high density polyethylene resin is Daqing petrochemical 5000S; the ethylene-vinyl acetate copolymer is Hanhua 1826.
In this embodiment, the interfacial compatibilizer is PE grafted maleic anhydride.
In this embodiment, the processing aid is a mixture of ethylene bis stearamide and calcium stearate.
In this embodiment, the mass ratio of ethylene bis stearamide to calcium stearate in the mixture of ethylene bis stearamide and calcium stearate is 1: 0.45.
in this embodiment, the stretch-resistant geocell material further comprises the following raw materials in parts by weight: toner: and 2 parts.
In this embodiment, the preparation method of the stretch-resistant geocell material includes the following steps:
A. respectively weighing raw materials of the anti-tensile geocell material for later use;
B. fully and uniformly mixing the raw materials except the nano reinforced filler by using a high-speed mixer for 3-5min to obtain a mixture;
C. melt extrusion: and feeding the mixture into a double-screw extruder, adding the nano reinforced filler into the double-screw extruder from a forced feeding device at the middle section of the double-screw extruder, and performing melt extrusion and granulation to obtain the stretch-resistant geocell material.
In this example, in step C, the parameters of the twin-screw extruder were set as: the temperature of the first zone is 175 ℃, the temperature of the second zone is 180 ℃, the temperature of the third zone is 180 ℃, the temperature of the fourth zone is 190 ℃, the temperature of the fifth zone is 190 ℃, the temperature of the sixth zone is 190 ℃, the temperature of the seventh zone is 200 ℃, the temperature of the eighth zone is 200 ℃, the temperature of the ninth zone is 200 ℃, the temperature of the machine head is 210 ℃, the rotating speed of the main machine is 300r/min, and the feeding frequency is 20 Hz.
Example 4:
a tensile geocell material is prepared from the following raw materials in parts by weight:
high density polyethylene: 70 parts of ethylene propylene diene monomer: 21 parts of ethylene-vinyl acetate copolymer: 12 parts of nano reinforcing filler: 7 parts of an interfacial compatilizer: 5 parts, processing aid: 0.65 part; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: 6.5: 14.5: 3.7; the nano-fibers are nano-carbon fibers.
In this embodiment, the high density polyethylene resin is Daqing petrochemical 5000S; the ethylene-vinyl acetate copolymer is Hanhua 1826.
In this embodiment, the interfacial compatibilizer is PE grafted maleic anhydride.
In this embodiment, the processing aid is a mixture of ethylene bis stearamide and calcium stearate.
In this embodiment, the mass ratio of ethylene bis stearamide to calcium stearate in the mixture of ethylene bis stearamide and calcium stearate is 1: 0.37.
in this embodiment, the stretch-resistant geocell material further comprises the following raw materials in parts by weight: toner: 1.2 parts.
In this embodiment, the preparation method of the stretch-resistant geocell material includes the following steps:
A. respectively weighing raw materials of the anti-tensile geocell material for later use;
B. fully and uniformly mixing the raw materials except the nano reinforced filler by using a high-speed mixer for 3-5min to obtain a mixture;
C. melt extrusion: and feeding the mixture into a double-screw extruder, adding the nano reinforced filler into the double-screw extruder from a forced feeding device at the middle section of the double-screw extruder, and performing melt extrusion and granulation to obtain the stretch-resistant geocell material.
In this example, in step C, the parameters of the twin-screw extruder were set as: the temperature of the first zone is 175 ℃, the temperature of the second zone is 178 ℃, the temperature of the third zone is 178 ℃, the temperature of the fourth zone is 185 ℃, the temperature of the fifth zone is 185 ℃, the temperature of the sixth zone is 185 ℃, the temperature of the seventh zone is 197 ℃, the temperature of the eighth zone is 197 ℃, the temperature of the ninth zone is 197 ℃, the temperature of the machine head is 207 ℃, the rotating speed of the main machine is 290r/min, and the feeding frequency is 16 HZ.
Comparative example 1:
the difference from example 4 is that ethylene propylene diene monomer rubber was replaced with high density polyethylene, and the other examples were the same as example 4.
Comparative example 2:
the difference from example 4 is that the ethylene-vinyl acetate copolymer was replaced with high density polyethylene, and the other examples were the same as example 4.
Comparative example 3:
the difference from the example 4 is that the nano reinforcing filler is nano calcium carbonate (without nano barium sulfate, nano mica and nano fiber), and the other is the same as the example 4.
Comparative example 4:
the difference from the embodiment 4 is that the nano barium sulfate in the nano reinforced filler is replaced by nano calcium carbonate, and the other is the same as the embodiment 4.
Comparative example 5:
the difference from example 4 is that the nano-reinforcing filler is prepared by replacing nano-fibers (nano-carbon fibers) with nano-calcium carbonate, and the rest is the same as example 4.
The tensile geocell materials obtained in examples 2 to 4 of the present invention and comparative examples 1 to 5 were prepared into standard bars, and the performance test was performed, respectively, and the test results are shown in tables 1 and 2:
TABLE 1
| Detecting items | Unit of | Example 2 | Example 3 | Example 4 |
| Notched impact strength of cantilever beam | J/m | 150 | 152 | 157 |
| Tensile strength | MPa | 26.2 | 27.5 | 30.4 |
| Flexural modulus | MPa | 1200 | 1214 | 1238 |
| Low temperature brittle point | ℃ | -46 | -46 | -47 |
| Heat distortion temperature under load | ℃ | 95 | 96 | 98 |
| Peel strength at ambient temperature (25 ℃ C.) | N/cm | 140 | 143 | 147 |
| Low temperature Peel Strength (-20 ℃ C.) | N/cm | 130 | 131 | 133 |
TABLE 2
| Detecting items | Unit of | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 |
| Notched impact strength of cantilever beam | J/m | 95 | 90 | 65 | 82 | 78 |
| Tensile strength | MPa | 21.1 | 22.2 | 23.4 | 25.7 | 24.8 |
| Flexural modulus | MPa | 708 | 600 | 1100 | 1121 | 1105 |
| Low temperature brittle point | ℃ | -35 | -40 | -38 | -42 | -40 |
| Heat distortion temperature under load | ℃ | 82 | 80 | 100 | 102 | 101 |
| Peel strength at ambient temperature (25 ℃ C.) | N/cm | 108 | 104 | 101 | 104 | 102 |
| Low temperature Peel Strength (-20 ℃ C.) | N/cm | 91 | 98 | 94 | 100 | 96 |
As can be seen from tables 1 and 2 above, the tensile geocell material of the present invention has the following advantages: the tensile strength is high, the tensile resistance is good, the notch impact strength of the cantilever beam is high, the impact resistance is good, the bending modulus is large, and the comprehensive mechanical property is good;
low-temperature brittleness point and good low-temperature resistance; high thermal deformation temperature under load and good high temperature resistance.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (10)
1. The anti-tensile geocell material is characterized by being prepared from the following raw materials in parts by weight:
high density polyethylene: 50-90 parts of ethylene propylene diene monomer: 10-30 parts of ethylene-vinyl acetate copolymer: 5-20 parts of nano reinforcing filler: 5-10 parts of an interfacial compatilizer: 1-8 parts of a processing aid: 0.3-1 part; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: (5.5-7.8): (13-16.5): (3-4.5); the nano-fibers are nano-carbon fibers.
2. The stretch resistant geocell material of claim 1, wherein the stretch resistant geocell material is made from raw materials comprising, by weight:
high density polyethylene: 65-75 parts of ethylene propylene diene monomer: 18-24 parts of ethylene-vinyl acetate copolymer: 10-14 parts of nano reinforcing filler: 6-8 parts of an interfacial compatilizer: 4-6 parts of a processing aid: 0.55-0.75 parts; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: (6-7): (13.8-15.2): (3.3-4); the nano-fibers are nano-carbon fibers.
3. The stretch resistant geocell material of claim 1, wherein the stretch resistant geocell material is made from raw materials comprising, by weight:
high density polyethylene: 70 parts of ethylene propylene diene monomer: 21 parts of ethylene-vinyl acetate copolymer: 12 parts of nano reinforcing filler: 7 parts of an interfacial compatilizer: 5 parts, processing aid: 0.65 part; the nano reinforcing filler is a mixture of nano calcium carbonate, nano barium sulfate, nano mica and nano fibers, wherein the mass ratio of the nano calcium carbonate to the nano barium sulfate to the nano mica to the nano fibers is 10: 6.5: 14.5: 3.7; the nano-fibers are nano-carbon fibers.
4. The stretch resistant geocell material of claim 1, wherein the high density polyethylene resin is Daqing petrochemical 5000S; the ethylene-vinyl acetate copolymer is Hanhua 1826.
5. The stretch resistant geocell material of claim 1, wherein the interphase compatibilizer is PE-grafted maleic anhydride.
6. The stretch resistant geocell material of claim 1, wherein the processing aid is a mixture of ethylene bis stearamide and calcium stearate.
7. The stretch resistant geocell material of claim 6, wherein the mixture of ethylene bis stearamide and calcium stearate has a mass ratio of ethylene bis stearamide to calcium stearate of 1: 0.3-0.45.
8. The stretch resistant geocell material of claim 1, further comprising the following raw materials in parts by weight: toner: 0.8-2 parts.
9. A method of making a stretch resistant geocell material of any one of claims 1 to 3, 6 to 9, comprising the steps of:
A. respectively weighing raw materials of the anti-tensile geocell material for later use;
B. fully and uniformly mixing the raw materials except the nano reinforced filler by using a high-speed mixer for 3-5min to obtain a mixture;
C. melt extrusion: and feeding the mixture into a double-screw extruder, adding the nano reinforced filler into the double-screw extruder from a forced feeding device at the middle section of the double-screw extruder, and performing melt extrusion and granulation to obtain the stretch-resistant geocell material.
10. The method of making a stretch resistant geocell material of claim 1, wherein in step C, the parameters of the twin screw extruder are set as: the temperature of the first zone is 170-180 ℃, the temperature of the second zone is 175-180 ℃, the temperature of the third zone is 175-180 ℃, the temperature of the fourth zone is 180-190 ℃, the temperature of the fifth zone is 180-190 ℃, the temperature of the sixth zone is 180-190 ℃, the temperature of the seventh zone is 195-200 ℃, the temperature of the eighth zone is 195-200 ℃, the temperature of the ninth zone is 195-200 ℃, the temperature of the head is 205-210 ℃, the rotating speed of the host machine is 280-300r/min, and the feeding frequency is 13-20 HZ.
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| CN106046488A (en) * | 2016-06-30 | 2016-10-26 | 安徽杰奥玛克合成材料科技有限公司 | Light-weight high-temperature-resistant flame-retardant polyethylene material for geogrids and manufacturing method thereof |
| CN106117733A (en) * | 2016-07-02 | 2016-11-16 | 天鸿建设集团有限公司 | High-strength GSZ and preparation method thereof |
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| CN106046488A (en) * | 2016-06-30 | 2016-10-26 | 安徽杰奥玛克合成材料科技有限公司 | Light-weight high-temperature-resistant flame-retardant polyethylene material for geogrids and manufacturing method thereof |
| CN106117733A (en) * | 2016-07-02 | 2016-11-16 | 天鸿建设集团有限公司 | High-strength GSZ and preparation method thereof |
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