CN114561058A - High-density PE and application thereof in human body sensing panel - Google Patents

High-density PE and application thereof in human body sensing panel Download PDF

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CN114561058A
CN114561058A CN202210346382.8A CN202210346382A CN114561058A CN 114561058 A CN114561058 A CN 114561058A CN 202210346382 A CN202210346382 A CN 202210346382A CN 114561058 A CN114561058 A CN 114561058A
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density
eso
jute fiber
filtering
hpg
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CN114561058B (en
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周志强
胡华林
周雷
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Shenzhen Xingchangming Printing Products Co ltd
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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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

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  • Medicinal Chemistry (AREA)
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Abstract

The invention discloses high-density PE and application thereof in a human sensing panel, wherein the high-density PE comprises the following components in parts by weight: 80-100 parts of high-density polyethylene, 15-20 parts of reinforcing filler, 1-3 parts of coupling agent, 0.1-0.5 part of compatibilizer, 0.1-0.5 part of antibacterial agent and 0.1-0.5 part of anti-aging agent; the reinforcing filler is the mixture of calcium carbonate and jute fiber, the compatibilizer is ESO-gS-HPG which can improve the compatibility between the calcium carbonate, dialdehyde modified jute fiber and high-density PE matrix material, so that the interfacial tension between the high-density PE/calcium carbonate/dialdehyde modified jute fiber is reduced, and the calcium carbonate and dialdehyde modified jute fiber can be better dispersed in the polyethylene matrix, thereby improving the mechanical property and heat resistance of the material.

Description

High-density PE and application thereof in human body sensing panel
Technical Field
The invention relates to the technical field of polymer synthesis, in particular to high-density PE and application thereof in a human sensing panel.
Background
Polyethylene (PE) is a thermoplastic resin obtained by polymerizing ethylene, and industrially, also includes a copolymer of ethylene with a small amount of α -olefin. The polyethylene is odorless and nontoxic, feels like wax, has excellent low-temperature resistance (the lowest use temperature can reach-100 to-70 ℃), has good chemical stability, and can resist corrosion of most of acid and alkali (cannot resist acid with oxidation property). Is insoluble in common solvents at room temperature, has low water absorption and excellent electrical insulation. Polyethylene is classified into high density polyethylene, low density polyethylene and linear low density polyethylene according to the polymerization method, molecular weight and chain structure.
The high-density polyethylene (HDPE) is a white powder or granular product, is nontoxic and tasteless, has a high crystallization rate and a high crystallization temperature, the crystallinity is 80-90%, the softening point is 125-135 ℃, and the use temperature can reach 100 ℃; hardness, tensile strength and creep are due to low density polyethylene; the paint has better temperature resistance, oil resistance, cold resistance, vapor permeability resistance, electrical insulation and environmental stress cracking resistance; the chemical stability is good, the paint is not dissolved in any organic solvent at room temperature, but can be swelled when contacted in aliphatic hydrocarbon, aromatic hydrocarbon and halogenated hydrocarbon for a long time, and is resistant to corrosion of acid, alkali and various salts; the water absorption is small, the flexibility can be still kept at low temperature, the electric insulation is high, and the method is widely applied to the fields of producing packaging films, woven bags, water pipes, plastic woods, folding chairs, surgical implants and the like. However, the high density polyethylene material, as a viscoelastic material, has disadvantages such as significant disadvantages in strength, rigidity, heat resistance and aging resistance, compared with a metal material, and in the processing and use processes of the high density polyethylene material product, stress cracking of a plastic part is often caused by some external and self factors, which seriously affects the use performance of the plastic part.
CN106750716A discloses a nano-modified high-density polyethylene material, and the physical properties of the polyethylene material are changed after nano-modification, and the invention aims to provide a nano-modified high-density polyethylene. The nano modified high-density polyethylene material comprises the following raw materials in percentage by weight: high density polyethylene: 70-80 parts; nano superfine calcium carbonate: 10-30; coupling agent: 0.5 to 1.5; PE wax: 1.0 to 2.0; antioxidant: 0.5 to 1.5; dispersing agent: 0.5 to 1.5; a crosslinking agent: 0.5 to 1.5. However, the added nano superfine calcium carbonate is easy to agglomerate, and the dispersibility in the high-density polyethylene material is poor, so that the prepared polyethylene material has poor resistance.
CN107286435A discloses a HDPE composite material and a preparation method thereof, wherein the composite material comprises the following components in parts by weight: 80-100 parts of HDPE; 10-16 parts of PC; 4-8 parts of PET; 0.1 to 0.5 portion of compatibilizer; 0.1 to 0.5 portion of antioxidant; 0.1 to 0.3 portion of lubricant. The addition of the PE-g-MAH can reduce the interfacial tension between HDPE/PC/PET phase interfaces and enhance the adhesive force between the phase interfaces, thereby effectively improving the compatibility between the HDPE/PC/PET phase interfaces and being beneficial to the HDPE composite material to obtain more excellent mechanical property; PC can better improve the rigidity of HDPE, and PET can better improve the toughness of HDPE. The combination of the two can simultaneously improve the mechanical property of the HDPE composite material. However, the mechanical properties of the composite material prepared by the invention are not excellent enough.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the present invention is to solve the problem of insufficient mechanical properties and heat resistance of the high density polyethylene material in the prior art.
In order to achieve the above object, the present invention provides a method for preparing high density PE, by adding compatibilizer ESO-gS-HPG, compatibility between calcium carbonate, dialdehyde-modified jute fiber and high density polyethylene matrix material is improved, interfacial tension between high density polyethylene/calcium carbonate/dialdehyde-modified jute fiber phase interfaces is reduced, calcium carbonate, dialdehyde-modified jute fiber is better dispersed in polyethylene matrix, and mechanical and heat resistance of polyethylene material is improved.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
preferably, the high-density PE comprises the following components in parts by weight: 80-100 parts of high-density polyethylene, 15-20 parts of reinforcing filler, 1-3 parts of coupling agent, 0.1-0.5 part of compatibilizer, 0.1-0.5 part of antibacterial agent and 0.1-0.5 part of anti-aging agent.
Preferably, the reinforcing filler is one or a mixture of two or more of talcum powder, calcium sulfate whisker, magnesium sulfate whisker, wollastonite, kaolin, carbon black, calcium carbonate and jute fiber;
preferably, the reinforcing filler is a mixture of calcium carbonate and jute fiber, and the mass ratio of the calcium carbonate to the jute fiber is 1-3: 2-5; further preferably, the jute fiber is dialdehyde-modified jute fiber, and the preparation method comprises the following steps: pulverizing jute fiber, and soaking in water for 40-48 h; then stirring and dispersing at 6000-7000r/min for 10-20min, and filtering; collecting the filter residue, mixing the filter residue with NaIO4Reacting the water solution at 40-60 deg.C for 30-60 min; filtering and collecting solid, soaking the solid in 90-95 wt% glycerol water solution for 1-2 hr, and stirring for 20-30 min; filtering, collecting solid, soaking the solid in water for 10-12h, filtering, and collecting filter cake; and (3) drying the filter cake in a drying oven at the temperature of 60-80 ℃ for 8-10h to obtain the dialdehyde modified jute fiber.
Preferably, the jute fiber is formed by mixing the jute fiber and NaIO4The dosage ratio of the aqueous solution is 1 g: 30-40mL of the NaIO4The concentration of the aqueous solution is 20-30 g/L.
Jute (Corchorus capsularis L) belongs to the genus Corchorus of Tiliaceae, bast fiber crops, is long, soft and glossy plant fiber, can be woven into high-strength coarse filament, is one of the cheapest natural fibers, has the characteristics of good moisture absorption performance, quick water loss and the like, simultaneously, the fiber material has the advantages of high mechanical strength, light weight, relatively low cost and the like, can obviously improve the heat resistance of polyethylene, reduces the hydrophilicity of the dialdehyde-modified jute fiber, is used in the polyethylene material, and can improve the mechanical property of the polyethylene material and simultaneously improve the waterproof performance of the material.
Preferably, the coupling agent is one or a mixture of two or more of silane coupling agents KH-550, KH-560, KH-570, titanate and aluminate.
Preferably, the compatibilizer is ESO-gS-HPG, and the preparation method comprises the following steps:
1) synthesis of ESO-gS: uniformly mixing ESO (epoxidized soybean oil), serinol and triphenylphosphine, heating to react in a nitrogen atmosphere, cooling after the reaction is finished, adding ethyl acetate and an ethanol water solution into the reaction liquid to obtain a mixed liquid, standing the mixed liquid, filtering, collecting filter residues, washing the filter residues, and drying the filter residues to obtain ESO-gS;
2) synthesis of ESO-gS-HPG: mixing ESO-gS, anhydrous dioxane and potassium methoxide, heating to react in nitrogen atmosphere to obtain reaction liquid, dripping (S) -glycidol into the reaction liquid, continuing to react, cooling, filtering, collecting filter residue, washing the filter residue with water, and drying to obtain light white solid, namely ESO-gS-HPG.
Further preferably, the preparation method of the ESO-gS-HPG comprises the following steps:
1) synthesis of ESO-gS: uniformly mixing 6-9g of ESO (epoxidized soybean oil), 4.5-5.5g of serinol and 0.3-0.5g of triphenyl phosphine, heating at 140 ℃ for 8-10h under the nitrogen atmosphere, cooling to 40-60 ℃ after the reaction is finished, adding 10-12mL of ethyl acetate and 40-45mL of 70-99 wt% of ethanol aqueous solution into the reaction liquid to obtain a mixed liquid, standing the mixed liquid at 0-5 ℃ for 2-3h, filtering, collecting filter residues, washing the filter residues with ethyl acetate and methanol for 2-3 times respectively, and drying the filter residues in a drying box at 30-50 ℃ for 10-12h to obtain ESO-gS;
2) synthesis of ESO-gS-HPG: mixing 2-4g of ESO-gS, 15-25mL of anhydrous dioxane and 0.1-0.3g of potassium methoxide, heating to 80-100 ℃ in the nitrogen atmosphere, reacting for 0.5-1h to obtain a reaction solution, dropwise adding 5-6g of (S) -glycidol into the reaction solution, continuing to react for 20-24h, cooling to 0-4 ℃, filtering, collecting filter residues, washing the filter residues with water, and drying in a drying box at 50-70 ℃ for 10-12h to obtain a light white solid, namely ESO-gS-HPG.
In order to solve the problem, the inventor adds a self-made compatibilizer ESO-gS-HPG into the composite material, the end group of the ESO-gS-HPG is hydroxyl, and the end group of the compatibilizer is connected with the high-density polyethyleneCaCO3Can form hydrogen bonds and help strengthen the interface or adhesion between molecules in ESO-gS-HPG and CaCO3The addition of the ESO-gS-HPG can reduce the interfacial tension between the phase interfaces of the high-density PE/calcium carbonate/dialdehyde modified jute fiber and enhance the adhesion of the phase interfaces, thereby effectively improving the compatibility between the particles and being beneficial to the high-density polyethylene composite material to obtain more excellent mechanical property.
Preferably, the antibacterial agent is one of nano silver and chitin.
Preferably, the anti-aging agent is a mixture of an antioxidant and a light stabilizer; the antioxidant is one of phosphite antioxidant, hindered phenol oxidant and thioester antioxidant;
more preferably, the anti-aging agent is a mixture of phosphite ester antioxidant 168 and hindered phenol antioxidant 1010 in a mass ratio of 1-2: 2-3.
The invention also discloses a preparation method of the high-density PE, which comprises the following steps:
weighing high-density polyethylene, a reinforcing filler, a coupling agent, a compatibilizer, an antibacterial agent and an anti-aging agent according to a formula, mixing for 3-5min, and performing melt extrusion, cooling, grain cutting and packaging to obtain the high-density PE.
Preferably, the temperature of the first zone of the double-screw extruder is 180-190 ℃, the temperature of the second zone is 150-170 ℃, the temperature of the third zone is 180-190 ℃, the temperature of the fourth zone is 175-185 ℃, the temperature of the fifth zone is 175-185 ℃, the residence time is 1-2 minutes, and the pressure is 10-15 MPa.
The high-density PE prepared by the invention can be used in a human sensing panel.
Compared with the prior art, the invention has the beneficial effects that:
according to the preparation method of the high-density PE material, the mechanical property of the high-density PE material is improved by adding the calcium carbonate, the ESO-gS-HPG and the dialdehyde modified jute fiber, the problem of cracking caused by internal stress in the long-term use process is avoided, and the calcium carbonate and the dialdehyde modified jute fiber can be better dispersed in a high-density polyethylene matrix due to the addition of the ESO-gS-HPG, and meanwhile, the heat resistance of the high-density polyethylene material is improved.
Detailed Description
The present invention will be described in further detail with reference to the following specific examples. The procedures, conditions, experimental methods and the like for carrying out the present invention are common knowledge and common general knowledge in the art except for the contents specifically mentioned below, and the present invention is not particularly limited.
For the sake of brevity, the articles used in the following examples are all commercially available products unless otherwise specified, and the methods used are conventional methods unless otherwise specified.
The invention uses part of raw materials with the following sources:
the high density polyethylene has a flexural modulus of elasticity of 1200%, a melt flow rate of 8g/10min, a tensile strength of 24.6MPa, and a density of 0.957kg/m3Suzhou Taichuan plastics trade, Inc.
Calcium carbonate with particle size of 1200 mesh.
Jute fiber with fiber length of 1-3mm and moisture regain of 6, produced in China.
Epoxidized soybean oil with CAS number of 8013-07-8, epoxy value of not less than 6.1%, acid value (mgKOH/g) of not more than 0.8, flash point (open cup) of not less than 280 deg.C, Wuhanxin Yokogaku chemical Co.
Anhydrous dioxane, also known as 1, 4-dioxane, CAS number 123-91-1, density 1.033g/cm3The boiling point is 101 ℃, the melting point is 12 ℃, and the chemical company Jinan Runtai is limited.
(S) -glycidol having CAS number 60456-23-7, purity of 99% and density of 1.116g/cm3Boiling point 66-67 deg.C, refractive index 1.433, flash point 178 ℉ and specific optical rotation-15 deg. (neat), purchased from hua chemical ltd, Changzhou.
Comparative example 1
A preparation method of high-density PE comprises the following steps:
weighing 100g of high-density polyethylene, 15g of reinforcing filler, 2g of silane coupling agent KH-550, 0.3g of chitin and 0.3g of anti-aging agent, placing the materials in a high-speed mixer, mixing for 4min, placing the mixture in a double-screw extruder, and performing melt extrusion, cooling, grain cutting and packaging to obtain the high-density PE; the temperature of the first zone of the double-screw extruder is 185 ℃, the temperature of the second zone is 160 ℃, the temperature of the third zone is 190 ℃, the temperature of the fourth zone is 180 ℃, the temperature of the fifth zone is 180 ℃, the retention time is 2 minutes, and the pressure is 13 Mpa.
The reinforcing filler is calcium carbonate.
The anti-aging agent is a mixture of phosphite ester antioxidant 168 and hindered phenol antioxidant 1010 in a mass ratio of 1: 2.
Comparative example 2
A preparation method of high-density PE comprises the following steps:
weighing 100g of high-density polyethylene, 15g of reinforcing filler, 2g of silane coupling agent KH-550, 0.3g of chitin and 0.3g of anti-aging agent, placing the materials in a high-speed mixer, mixing for 4min, placing the mixture in a double-screw extruder, and performing melt extrusion, cooling, grain cutting and packaging to obtain the high-density PE; the temperature of the first zone of the double-screw extruder is 185 ℃, the temperature of the second zone is 160 ℃, the temperature of the third zone is 190 ℃, the temperature of the fourth zone is 180 ℃, the temperature of the fifth zone is 180 ℃, the retention time is 2 minutes, and the pressure is 13 Mpa.
The reinforcing filler is jute fiber.
The anti-aging agent is a mixture of phosphite ester antioxidant 168 and hindered phenol antioxidant 1010 in a mass ratio of 1: 2.
Example 1
A preparation method of high-density PE comprises the following steps:
weighing 100g of high-density polyethylene, 15g of reinforcing filler, 2g of silane coupling agent KH-550, 0.3g of chitin and 0.3g of anti-aging agent, placing the materials in a high-speed mixer, mixing for 4min, placing the mixture in a double-screw extruder, and performing melt extrusion, cooling, grain cutting and packaging to obtain the high-density PE; the temperature of the first zone of the double-screw extruder is 185 ℃, the temperature of the second zone is 160 ℃, the temperature of the third zone is 190 ℃, the temperature of the fourth zone is 180 ℃, the temperature of the fifth zone is 180 ℃, the retention time is 2 minutes, and the pressure is 13 Mpa.
The reinforcing filler is dialdehyde modified jute fiber and the preparation method is as follows: 2g of jute fiber is crushed and then put into water for soaking for 48 hours; then stirring and dispersing at 6000r/min for 20minFiltering; collecting filter residue, mixing the filter residue with 60mL of 30g/L NaIO4Reacting the aqueous solution at 50 ℃ for 60 min; filtering and collecting solid, soaking the solid in 95 wt% glycerol water solution for 2 hr, and stirring for 30 min; filtering, collecting solid, soaking the solid in water for 12h, filtering, and collecting filter cake; and (3) drying the filter cake in a drying oven at the temperature of 80 ℃ for 10 hours to obtain the dialdehyde modified jute fiber.
The anti-aging agent is a mixture of phosphite ester antioxidant 168 and hindered phenol antioxidant 1010 in a mass ratio of 1: 2.
Example 2
A preparation method of high-density PE comprises the following steps:
weighing 100g of high-density polyethylene, 15g of reinforcing filler, 2g of silane coupling agent KH-550, 0.3g of chitin and 0.3g of anti-aging agent, placing the materials in a high-speed mixer, mixing for 4min, placing the mixture in a double-screw extruder, and performing melt extrusion, cooling, grain cutting and packaging to obtain the high-density PE; the temperature of the first zone of the double-screw extruder is 185 ℃, the temperature of the second zone is 160 ℃, the temperature of the third zone is 190 ℃, the temperature of the fourth zone is 180 ℃, the temperature of the fifth zone is 180 ℃, the retention time is 2 minutes, and the pressure is 13 Mpa.
The reinforcing filler is prepared from the following components in percentage by mass: 3, mixing the calcium carbonate and the dialdehyde modified jute fiber; the preparation method of the dialdehyde modified jute fiber comprises the following steps: 2g of jute fiber is crushed and then put into water for soaking for 48 hours; then stirring and dispersing at the speed of 6000r/min for 20min and filtering; collecting filter residue, mixing the filter residue with 60mL of 30g/L NaIO4Reacting the aqueous solution at 50 ℃ for 60 min; filtering and collecting solid, soaking the solid in 95 wt% glycerol water solution for 2 hr, and stirring for 30 min; filtering, collecting solid, soaking the solid in water for 12h, filtering, and collecting filter cake; and (3) drying the filter cake in a drying oven at the temperature of 80 ℃ for 10 hours to obtain the dialdehyde modified jute fiber.
The anti-aging agent is a mixture of phosphite ester antioxidant 168 and hindered phenol antioxidant 1010 in a mass ratio of 1: 2.
Example 3
A preparation method of high-density PE comprises the following steps:
weighing 100g of high-density polyethylene, 15g of reinforcing filler, 2g of silane coupling agent KH-550, 0.3g of ESO-gS-HPG, 0.3g of chitin and 0.3g of anti-aging agent, mixing for 4min in a high-speed mixer, and then putting in a double-screw extruder to obtain a finished product through melt extrusion, cooling, grain cutting and packaging to obtain the high-density PE; the temperature of the first zone of the double-screw extruder is 185 ℃, the temperature of the second zone is 160 ℃, the temperature of the third zone is 190 ℃, the temperature of the fourth zone is 180 ℃, the temperature of the fifth zone is 180 ℃, the retention time is 2 minutes, and the pressure is 13 Mpa.
The reinforcing filler is prepared from the following components in percentage by mass: 3, mixing the calcium carbonate and the dialdehyde modified jute fiber; the preparation method of the dialdehyde modified jute fiber comprises the following steps: 2g of jute fiber is crushed and then put into water for soaking for 48 hours; then stirring and dispersing at the speed of 6000r/min for 20min and filtering; collecting filter residue, mixing the filter residue with 60mL of 30g/L NaIO4Reacting the aqueous solution at 50 ℃ for 60 min; filtering and collecting solid, soaking the solid in 95 wt% glycerol water solution for 2 hr, and stirring for 30 min; filtering, collecting solid, soaking the solid in water for 12h, filtering, and collecting filter cake; and (3) drying the filter cake in a drying oven at the temperature of 80 ℃ for 10 hours to obtain the dialdehyde modified jute fiber.
The preparation method of the ESO-gS-HPG comprises the following steps:
1) synthesis of ESO-gS: uniformly mixing 8.46g of ESO (epoxidized soybean oil), 5.3g of serinol and 0.39g of triphenyl phosphate, heating at 130 ℃ for 8 hours in a nitrogen atmosphere, cooling to 50 ℃ after the reaction is finished, adding 10mL of ethyl acetate and 40mL of 99wt ethanol aqueous solution into the reaction solution to obtain a mixed solution, standing the mixed solution at 0 ℃ for 2 hours, filtering, collecting filter residues, washing the filter residues with ethyl acetate and methanol respectively for 3 times, and drying the filter residues in a drying box at 40 ℃ for 10 hours to obtain ESO-gS;
2) synthesis of ESO-gS-HPG: mixing 3g of ESO-gS, 20mL of anhydrous dioxane and 0.13g of potassium methoxide, heating to 100 ℃ in a nitrogen atmosphere, reacting for 1h to obtain a reaction liquid, dropwise adding 5.6g of (S) -glycidol into the reaction liquid, continuing reacting for 24h, cooling to 0 ℃, filtering, collecting filter residues, washing the filter residues with water, and drying in a 60 ℃ drying box for 12h to obtain a light white solid, namely ESO-gS-HPG.
The anti-aging agent is a mixture of phosphite ester antioxidant 168 and hindered phenol antioxidant 1010 in a mass ratio of 1: 2.
Test example 1
Mechanical Property test
Tensile property: determination of tensile Properties of plastics according to GB/T1040.3-2006 part 3: experimental conditions for thin plastics and sheets Using a CMT-4104 Microcomputer controlled electronic Universal tester (MTS systems, China) Inc., tensile properties of the high density PE prepared in examples 1-3 and comparative examples 1-2 were measured, the tensile rate was 50mm/min, the experimental temperature was 25 ℃, the gauge length was 60mm, the thickness was 4mm, 6 specimens in one group were adjusted at a temperature of (23 + -2) ° C and a relative humidity of (50 + -5) ° C for at least 24 hours, and the test results were averaged.
Bending strength: the bending strength is the maximum bending stress that the test specimen can withstand before reaching a specified bending value during bending. The test method comprises the steps of re-crushing the high-density PE material samples prepared in the examples 1-3 and the comparative examples 1-2, and then performing hot press molding on the samples through a die on a flat hot press, wherein the hot press parameters are set as follows: temperature: 190 ℃, pressure: 8Mpa, time: 10min, the size of the die is 50mm multiplied by 2mm, the bending test speed is 20mm/min, then the plate subjected to hot press forming is cut into the required sample size, the bending performance is tested according to GB/T9341-2008 'determination of plastic bending performance', 6 samples are obtained in one group, and the test results are averaged.
The test results are shown in table 1:
table 1: mechanical test results of high-density PE
Tensile strength (Mpa) Flexural strength (Mpa)
Example 1 24.53 17.25
Example 2 26.88 23.12
Example 3 28.69 25.34
Comparative example 1 20.21 13.52
Comparative example 2 20.42 13.35
As can be seen from the data in Table 1, the high density PE prepared in example 3 has the best mechanical properties, while example 3 is different from other examples and comparative examples in that calcium carbonate, ESO-gS-HPG and dialdehyde modified jute fiber are added, and the possible reasons are that the hydrocarbon chain segment of ESO-gS-HPG is intertwined with the molecular chain of the high density PE, so that the compatibility between the calcium carbonate, dialdehyde modified jute fiber and the high density PE matrix material is improved, the interfacial tension between the phase interfaces of the high density PE/calcium carbonate/dialdehyde modified jute fiber is reduced, the adhesion between the phase interfaces is enhanced, the compatibility between the phase interfaces is effectively improved, and the jute fiber and calcium carbonate can better act synergistically to improve the mechanical properties of the high density polyethylene composite material.
Test example 2
Measurement of Heat distortion temperature: the test object was the high-density PE obtained in examples 1 to 3 and comparative examples 1 to 2, and the high-density polyethylene material sample was immersed in silicone oil at a constant temperature, and the sample was subjected to bending deformation at a temperature at which a predetermined deflection value was reached under the action of a simply supported beam-type bending load. The specific test method comprises the steps of placing a polyethylene rectangular sample with the size of 80mm multiplied by 10mm multiplied by 4mm on a support with the span of 64mm, soaking the polyethylene rectangular sample in silicone oil after the installation is finished, applying a load to the middle point of the two supports to finish the installation of the sample, and under the condition of isothermal heating rate (120 ℃/h), when the bending deformation of the sample under the load reaches a preset value, the temperature at the moment is the required thermal deformation temperature, wherein the set conditions are as follows: the maximum temperature is 200 ℃, the initial temperature is 35 ℃, the cooling temperature is 35 ℃, the preheating time is 200s, and the test deflection stopping condition is 0.34 mm. The measurement results are shown in table 2:
table 2: heat distortion temperature measurement results of high-Density PE
Heat distortion temperature (. degree. C.)
Example 1 80.6
Example 2 82.3
Example 3 86.5
Comparative example 1 76.3
Comparative example 2 72.6
The higher the heat distortion temperature, the better the heat resistance of the material, and as can be seen from the experimental data in table 2, the better the heat resistance of example 3 is, probably because the addition of ESO-gS-HPG improves the compatibility between dialdehyde-modified jute fiber, calcium carbonate and high density polyethylene matrix material, and can be better dispersed in the polyethylene matrix, thereby improving the resistance of the material.

Claims (10)

1. The high-density PE is characterized by comprising the following components in parts by weight: 80-100 parts of high-density polyethylene, 15-20 parts of reinforcing filler, 1-3 parts of coupling agent, 0.1-0.5 part of compatibilizer, 0.1-0.5 part of antibacterial agent and 0.1-0.5 part of anti-aging agent.
2. The high-density PE according to claim 1, wherein: the reinforcing filler is one or a mixture of two or more of talcum powder, calcium sulfate whisker, magnesium sulfate whisker, wollastonite, kaolin, carbon black, calcium carbonate and jute fiber.
3. The high-density PE according to claim 2, wherein: the reinforcing filler is the mixture of calcium carbonate and jute fiber.
4. The high-density PE according to claim 3, wherein the jute fiber is dialdehyde-modified jute fiber prepared by the following method: pulverizing jute fiber, and soaking in water for 40-48 h; then stirring and dispersing at 6000-7000r/min for 10-20min, and filtering; collecting the filter residue, mixing the filter residue with NaIO4Reacting the water solution at 40-60 deg.c for 30-60 min; filtering and collecting solid, soaking the solid in 90-95 wt% glycerol water solution for 1-2 hr, and stirring for 20-30 min; filtering, collecting solid, soaking the solid in water for 10-12h, filtering, and collecting filter cake; and (3) drying the filter cake in a drying oven at the temperature of 60-80 ℃ for 8-10h to obtain the dialdehyde modified jute fiber.
5. The high density of claim 4PE, characterized in that the jute fiber is blended with NaIO4The dosage ratio of the aqueous solution is 1 g: 30-40 mL.
6. The high density PE of claim 1 wherein the compatibilizer is ESO-gS-HPG and is prepared by a process comprising the steps of:
1) synthesis of ESO-gS: uniformly mixing epoxidized soybean oil, serinol and triphenyl phosphine, heating to react in a nitrogen atmosphere, cooling after the reaction is finished, adding ethyl acetate and an ethanol water solution into the reaction liquid to obtain a mixed liquid, standing the mixed liquid, filtering, collecting filter residues, washing the filter residues, and drying the filter residues to obtain ESO-gS;
2) synthesis of ESO-gS-HPG: mixing ESO-gS, anhydrous dioxane and potassium methoxide, heating to react in nitrogen atmosphere to obtain reaction liquid, dripping (S) -glycidol into the reaction liquid, continuing to react, cooling, filtering, collecting filter residue, washing the filter residue with water, and drying to obtain light white solid, namely ESO-gS-HPG.
7. The high density PE of claim 6 wherein the method of preparation of the ESO-gS-HPG comprises the steps of:
1) synthesis of ESO-gS: uniformly mixing 6-9g of epoxidized soybean oil, 4.5-5.5g of serinol and 0.3-0.5g of triphenyl phosphate, heating at 140 ℃ for 8-10h in the nitrogen atmosphere, cooling to 40-60 ℃ after the reaction is finished, adding 10-12mL of ethyl acetate and 40-45mL of 70-99wt ethanol aqueous solution into the reaction solution to obtain a mixed solution, standing the mixed solution at 0-5 ℃ for 2-3h, filtering, collecting filter residue, washing the filter residue with ethyl acetate and methanol for 2-3 times respectively, and drying the filter residue in a drying oven at 30-50 ℃ for 10-12h to obtain ESO-gS;
2) synthesis of ESO-gS-HPG: mixing 2-4g of ESO-gS, 15-25mL of anhydrous dioxane and 0.1-0.3g of potassium methoxide, heating to 80-100 ℃ in the nitrogen atmosphere, reacting for 0.5-1h to obtain a reaction solution, dropwise adding 5-6g of (S) -glycidol into the reaction solution, continuing to react for 20-24h, cooling to 0-4 ℃, filtering, collecting filter residues, washing the filter residues with water, and drying in a drying box at 50-70 ℃ for 10-12h to obtain a light white solid, namely ESO-gS-HPG.
8. The high-density PE according to claim 1, wherein: the anti-aging agent is a mixture of phosphite ester antioxidant 168 and hindered phenol antioxidant 1010 in a mass ratio of 1-2: 2-3.
9. The method for producing a high-density PE according to any one of claims 1 to 8, comprising the steps of: weighing high-density polyethylene, a reinforcing filler, a coupling agent, a compatibilizer, an antibacterial agent and an anti-aging agent according to a formula, mixing for 3-5min, and performing melt extrusion, cooling, grain cutting and packaging to obtain the high-density PE.
10. Use of a high density PE according to any one of claims 1 to 8 in a human sensing panel.
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