CN115403847A - High-strength anti-aging polyethylene composite material for photovoltaic floating body and preparation method thereof - Google Patents
High-strength anti-aging polyethylene composite material for photovoltaic floating body and preparation method thereof Download PDFInfo
- Publication number
- CN115403847A CN115403847A CN202211074765.0A CN202211074765A CN115403847A CN 115403847 A CN115403847 A CN 115403847A CN 202211074765 A CN202211074765 A CN 202211074765A CN 115403847 A CN115403847 A CN 115403847A
- Authority
- CN
- China
- Prior art keywords
- parts
- composite material
- natural fiber
- density polyethylene
- polyethylene composite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of high polymer materials, in particular to a polyethylene composite material for a floating type photovoltaic floating body and a preparation method thereof; the composite material is characterized by being prepared from the following raw materials in parts by weight: 100 parts of polyethylene resin, 15-25 parts of vinyl copolymer, 3236 parts of hybrid natural fiber, 5262 parts of anti-ultraviolet nano particles, 5262 parts of auxiliary agent, and 3763 parts of zxft 3763 parts. Has excellent mechanical property and ageing resistance.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a polyethylene composite material for a floating type photovoltaic floating body and a preparation method thereof.
Background
Photovoltaic power generation has a wide prospect as a green and environment-friendly 'carbon negative' technology. The ground photovoltaic and the roof photovoltaic are the main components in the photovoltaic industry of China, the problems of land resource occupation, scattered layout and the like exist, and the development of the floating photovoltaic suitable for the water area environment is of great significance. The water areas of rivers, lakes, reservoirs and the like in the southeast region of China are wide, and a huge construction space is provided for floating type photovoltaic cells.
The floating body is a floating foundation of floating type photovoltaic, the existing floating body material is mainly high-density polyethylene, and the high-density polyethylene has the advantages of light weight, excellent shock resistance, easiness in transportation and the like. However, the high density polyethylene has the defects of poor aging resistance and low mechanical strength, so that the high density polyethylene is easy to crack under the influence of long-term water surface environmental factors, and the stability of the floating power station is influenced. The development of the polyethylene floating body material with high strength and excellent aging resistance has important significance for the development of the floating photovoltaic power station.
The invention provides a floating type photovoltaic floating body and a preparation method thereof aiming at the problems.
Disclosure of Invention
The invention aims to provide a high-density polyethylene composite material for a floating photovoltaic floating body, which has high mechanical strength and excellent aging resistance; the invention also aims to provide a preparation method of the floating type photovoltaic floating body, which is used for preparing the photovoltaic floating body by adopting a hybrid fiber-nano particle synergistic enhancement method, has simple and easy process and is suitable for industrial production.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a high-density polyethylene composite material for a floating photovoltaic floating body, which comprises polyethylene resin, an alkene copolymer, hybrid natural fibers, ultraviolet-resistant nano particles and an auxiliary agent.
Further, the mass ratio of the polyethylene resin, the vinyl copolymer, the hybrid natural fiber, the ultraviolet-resistant nano particles and the auxiliary agent is as follows: 100: (15-25): (2-4): (1-2): (0-2); more preferably 100: (18 to 22): (2-3): (1-1.5): (0-1).
Wherein the density of the polyethylene resin is 1.015-1.035 g/cm 3 The melt flow rate of 2.16kg at 230 ℃ is 0.4 to 0.7g/10min.
Wherein the vinyl copolymer is a copolymer of two vinyl monomers such as ethylene, propylene, octene and the like, and the density is 0.905-0.925 g/cm 3 The melt flow rate of 2.16kg at 230 ℃ is 1.1 to 1.3g/10min.
Wherein the auxiliary agent is one or a mixture of more of a lubricant, an antioxidant and a coloring agent.
Wherein the preparation method of the hybrid natural fiber comprises the following steps:
(1) Ultrasonically dispersing natural fibers in 1g/L caffeic acid solution, adjusting pH to 8.5, stirring for 4-5h, filtering, washing, and drying to obtain caffeic acid coated natural fibers. The purpose of the caffeic acid pretreatment on the surface of the natural fiber is to strengthen the surface active groups (carboxyl groups and the like) of the natural fiber through the in-situ coating of the caffeic acid.
The natural fiber is one or a mixture of several of fibrilia, bamboo fiber, wood fiber and cotton fiber, and the length of the natural fiber is 5-8mm.
(2) Further, the natural fiber coated by the caffeic acid is added into the inorganic nanoparticle dispersion liquid and stirred for 2 to 3 hours to prepare the natural fiber deposited by the inorganic nanoparticles. The purpose of adding the inorganic nanoparticles is to realize the deposition of the inorganic nanoparticles on the surface of the natural fiber by utilizing the non-covalent bond interaction between the inorganic nanoparticles and the carboxyl groups on the surface of the natural fiber coated by the caffeic acid, thereby improving the self strength of the natural fiber and the surface roughness of the fiber by constructing a hybrid structure and achieving the final purpose of reinforcing the polyethylene material by the fiber.
Wherein, the inorganic nano particles are one or a mixture of more of nano calcium carbonate, nano calcium phosphate, nano titanium dioxide and the like.
(3) Further, adding a silane coupling agent into the dispersion liquid of the inorganic nano particle deposition natural fiber, stirring for 1-2h, filtering, washing and drying to obtain the hybrid natural fiber. The silane coupling agent is added to increase the compatibility of the natural fiber deposited with the inorganic nanoparticles and the polyethylene material.
Wherein the silane coupling agent is one or a mixture of two of KH151, KH171 and the like.
The preparation process of the hybrid natural fiber of the invention is required to be prepared according to the steps and the weight ratio of the raw materials, and the hybrid natural fiber can not be obtained by simply blending or preparing according to different proportions.
Scanning electron microscope images of the hybridized natural fiber before and after treatment are shown in figures 1A and B, inorganic nano particles are attached to the surface of the hybridized natural fiber and are in a rough shape, and the fact that the hybridized natural fiber is successfully prepared is proved.
The preparation method of the uvioresistant nanoparticles comprises the following steps: dispersing and dissolving the catechol monomer in a mixed solution of ethanol and water, adjusting the pH value of the solution to 9.5, stirring for 8-10h, centrifuging the solution, and drying to obtain the anti-ultraviolet nano particles. Note that the uv resistant nanoparticles here are catechols, unlike the previous inorganic nanoparticles. The electron microscope of the prepared anti-ultraviolet nano particles is shown in figure 2, and the anti-ultraviolet nano particles are oval and about 50 nm.
Wherein in the preparation process of the anti-ultraviolet nano particle, the weight ratio of the catechol monomer to the ethanol to the water is 0.5:40:100.
wherein the catechol monomer is one or more of dopamine, tannin, lignin, caffeic acid, etc.
The invention further provides a preparation method of the high-density polyethylene composite material for the floating photovoltaic floating body, which comprises the following steps:
weighing 70-80wt% of polyethylene resin and hybrid natural fiber according to the weight parts of the raw materials, mixing for 20min at 500r/min, and then carrying out melt extrusion granulation at 225-245 ℃ by using a double-screw extruder to obtain first intermediate granules.
Weighing the rest polyethylene resin, the vinyl polymer and the uvioresistant nano particles according to the weight parts of the raw materials, mixing for 10min at the speed of 800r/min, and then carrying out melt extrusion granulation at the temperature of 215-230 ℃ by using a double-screw extruder to obtain second intermediate granules.
Weighing the auxiliary agent according to the weight parts of the raw materials, mixing the auxiliary agent with the first intermediate material and the second intermediate material, and then performing melt extrusion at 210-230 ℃ by using a double-screw extruder to obtain the high-density polyethylene composite material for the floating photovoltaic floating body.
Has the advantages that:
1. doping is a conventional means for improving mechanical properties of polyethylene materials and the like, and the mechanical properties are simultaneously examined for strength (tensile breaking stress) and strain (breaking nominal strain), and generally, the two properties cannot be obtained at the same time, one property is increased, and the other property is reduced or unchanged, as shown in comparative examples 2 or 3. It is therefore a technical challenge in the art to be able to increase both strength and strain. According to the floating type photovoltaic high-density polyethylene composite material, the hybrid natural fiber and the ultraviolet-resistant nano particles are added at the same time, the inorganic nano particles are deposited on the surface of the natural fiber in situ to increase the surface roughness of the fiber, the silane coupling agent is introduced to the surface of the inorganic nano particle layer to increase the compatibility of the natural fiber and the polyethylene resin, and the high-density polyethylene base material is enhanced and modified based on the fiber enhancement theory. Meanwhile, the uvioresistant nanoparticles and the hybrid natural fibers have synergistic interaction, so that the strength (tensile breaking stress) is improved, the strain (breaking nominal strain) is increased, and the technical problem which is difficult to solve in the field is solved.
2. After uv irradiation (simulating outdoor long-time illumination), comparative example 2 has slightly better intensity than comparative example 1 and similar strain to comparative example 1. It was demonstrated that the addition of the hybrid fibers was not sufficient to alter the mechanical retention in the outdoor environment over long periods of time with light. Comparative example 3 the strength and strain are better than those of comparative example 2 and better than those of comparative example 1 due to the addition of the anti-uv nanoparticles. Therefore, ultraviolet irradiation is an absolute factor for destroying plastics and the like, and the problem in the field of how to prevent aging and avoid the reduction of mechanical properties under long-term irradiation is solved. The floating type photovoltaic high-density polyethylene composite material comprises anti-ultraviolet nano particles, the preparation of the anti-ultraviolet nano particles is based on a self-polymerization system of 'mussel-like' catechol monomers, the anti-ultraviolet nano particles have an excellent enhancement effect on the high-density polyethylene, and meanwhile, due to the abundant benzene ring structure, the high-density polyethylene material has excellent aging resistance.
3. The natural fiber and the ultraviolet-resistant nano particle are prepared based on renewable resources, can relieve the problem of dependence of the filler prepared by taking petrochemical resources as raw materials on the fossil resources, meet the requirements of environmental protection and sustainable development, and have important economic and social benefits.
4. The hybrid natural fiber and the ultraviolet-resistant nano particles are not used for improving the high-density polyethylene floating body material in the field; the mechanical strength and the aging resistance of the high-density polyethylene floating body material are improved according to the steps and the weight ratio of the raw materials; the preparation process of the hybrid natural fiber of the invention is required to be prepared according to the steps and the weight ratio of the raw materials, and the hybrid natural fiber can not be obtained by simple blending or preparation according to different proportions.
Drawings
FIG. 1 is a scanning electron microscope image of the hybrid natural fiber before and after treatment, wherein A is a natural fiber and B is a hybrid natural fiber.
FIG. 2 is a transmission electron microscope image of the anti-UV nanoparticles prepared by the present invention.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the following examples, a polyethylene resin having a density of 1.013g/cm was used 3 The melt flow rate of 2.16kg at 230 ℃ was 0.5g/10min.
Example 1
A high-density polyethylene composite material for a floating photovoltaic floating body comprises the following raw materials in parts by weight:
wherein the ethylene-propylene copolymer has a density of 0.917g/cm 3 The melt flow rate of 2.16kg at 230 ℃ was 1.15g/10min.
Wherein the auxiliary agent is a mixture of a lubricant, an antioxidant and a coloring agent.
Wherein the preparation method of the hybrid wood fiber comprises the following steps:
ultrasonically dispersing wood fibers in 1g/L caffeic acid solution, adjusting the pH value to 8.5, stirring for 4.5h, filtering, washing and drying to obtain the caffeic acid coated wood fibers.
Further, the wood fiber coated with the caffeic acid is added into the nano calcium carbonate dispersion liquid, and is stirred for 3 hours to prepare the wood fiber deposited with the nano calcium carbonate.
Further, adding KH151 into the wood fiber dispersion solution deposited by the nano calcium carbonate, stirring for 1.5h, filtering, washing and drying to obtain the hybrid wood fiber.
Wherein the length of the wood fiber is 5.5mm.
Wherein the weight ratio of Cheng Zhongmu fiber prepared from the hybrid wood fiber, nano calcium carbonate, KH151 and caffeic acid solution is 1:0.5:1:100.
the preparation method of the uvioresistant nano particle comprises the following steps: and dispersing and dissolving dopamine in a mixed solution of ethanol and water, adding ammonia water to adjust the pH of the solution to 9.5, stirring for 8 hours, centrifuging the solution, and drying to obtain the anti-ultraviolet nanoparticles.
The invention further provides a preparation method of the high-density polyethylene composite material for the floating photovoltaic floating body, which comprises the following steps:
weighing 70wt% of polyethylene resin and the hybrid wood fiber according to the weight parts of the raw materials, mixing for 20min at 500r/min, and then carrying out melt extrusion granulation at 225 ℃ by using a double-screw extruder to obtain first intermediate granules.
Weighing the rest polyethylene resin, the ethylene-propylene copolymer and the uvioresistant nanoparticles according to the weight parts of the raw materials, mixing for 10min at 800r/min, and then performing melt extrusion granulation at 215 ℃ by using a double-screw extruder to obtain second intermediate granules.
Weighing the auxiliary agent according to the weight parts of the raw materials, mixing the auxiliary agent with the first intermediate material and the second intermediate material, and then performing melt extrusion at 210 ℃ by using a double-screw extruder to obtain the high-density polyethylene composite material for the floating photovoltaic floating body.
Example 2
A high-density polyethylene composite material for a floating photovoltaic floating body comprises the following raw materials in parts by weight:
wherein the density of the propylene-butylene copolymer is 0.925g/cm 3 The melt flow rate of 2.16kg at 230 ℃ was 1.3g/10min.
The preparation method of the hybrid fibrilia comprises the following steps:
ultrasonically dispersing the fibrilia in 1g/L caffeic acid solution, adjusting the pH to 8.5, stirring for 5h, filtering, washing and drying to obtain the caffeic acid coated fibrilia.
Further, the fibrilia coated with the caffeic acid is added into the nano titanium dioxide dispersion liquid, and is stirred for 3 hours to prepare the fibrilia deposited by the nano titanium dioxide.
Further, adding KH151 into the dispersion of fibrilia deposited by the nano titanium dioxide, stirring for 1h, filtering, washing and drying to obtain the hybrid fibrilia.
Wherein the length of the fibrilia is 6mm.
Wherein the weight ratio of the fibrilia to the nano titanium dioxide to the KH151 to the caffeic acid solution in the preparation process of the hybrid fibrilia is 2:1:2:100.
the preparation method of the uvioresistant nano particle comprises the following steps: dispersing and dissolving lignin in a mixed solution of ethanol and water, adding ammonia water to adjust the pH of the solution to 9.5, stirring for 8.5h, centrifuging the solution, and drying to obtain the anti-ultraviolet nanoparticles.
The invention further provides a preparation method of the high-density polyethylene composite material for the floating photovoltaic floating body, which comprises the following steps:
weighing 80wt% of polyethylene resin and hybrid fibrilia according to the weight parts of the raw materials, mixing for 20min at 500r/min, and then carrying out melt extrusion granulation at 235 ℃ by using a double-screw extruder to obtain first intermediate granules.
Weighing the rest polyethylene resin, the propylene-butylene copolymer and the uvioresistant nanoparticles according to the weight parts of the raw materials, mixing for 10min at 800r/min, and then performing melt extrusion granulation at 225 ℃ by using a double-screw extruder to obtain second intermediate granules.
Weighing the first intermediate material and the second intermediate material according to the weight parts of the raw materials, mixing, and then performing melt extrusion at 230 ℃ by using a double-screw extruder to obtain the high-density polyethylene composite material for the floating photovoltaic floating body.
Example 3
A high-density polyethylene composite material for a floating photovoltaic floating body comprises the following raw materials in parts by weight:
wherein the density of the ethylene-butylene copolymer is 0.920g/cm 3 The melt flow rate of 2.16kg at 230 ℃ was 1.25g/10min.
Wherein the auxiliary agent is a mixture of a lubricant and a coloring agent.
The preparation method of the hybrid bamboo fiber comprises the following steps:
ultrasonically dispersing bamboo fibers in 1g/L caffeic acid solution, adjusting the pH value to 8.5, stirring for 5 hours, filtering, washing and drying to obtain the caffeic acid coated bamboo fibers.
Further, the caffeic acid-coated bamboo fiber is added into the nano calcium phosphate dispersion liquid, and is stirred for 2.5 hours to prepare the bamboo fiber deposited by the nano calcium phosphate.
Further, adding KH171 into the dispersion of bamboo fiber deposited with nano calcium phosphate, stirring for 2h, filtering, washing, and drying to obtain the hybrid bamboo fiber.
Wherein the length of the bamboo fiber is 6.5mm.
Wherein the weight ratio of Cheng Zhongzhu fiber prepared from the hybrid bamboo fiber, nano calcium phosphate, KH171 and caffeic acid solution is 1.5:1:1.5:100.
the preparation method of the uvioresistant nano particle comprises the following steps: dispersing and dissolving tannic acid in a mixed solution of ethanol and water, adding ammonia water to adjust the pH of the solution to 9.5, stirring for 10 hours, centrifuging the solution, and drying to obtain the anti-ultraviolet nanoparticles.
The invention further provides a preparation method of the high-density polyethylene composite material for the floating photovoltaic floating body, which comprises the following steps:
weighing 75wt% of polyethylene resin and the hybrid bamboo fiber according to the weight parts of the raw materials, mixing for 20min at 500r/min, and then performing melt extrusion granulation at 230 ℃ by using a double-screw extruder to obtain first intermediate granules.
Weighing the rest polyethylene resin, the ethylene-butylene copolymer and the uvioresistant nano particles according to the weight parts of the raw materials, mixing for 10min at the speed of 800r/min, and then carrying out melt extrusion granulation at the temperature of 220 ℃ by using a double-screw extruder to obtain second intermediate granules.
Weighing the auxiliary agent according to the weight parts of the raw materials, mixing the auxiliary agent with the first intermediate material and the second intermediate material, and then melting and extruding the mixture at 225 ℃ by using a double-screw extruder to obtain the high-density polyethylene composite material for the floating type photovoltaic floating body.
Comparative example 1 (without addition of hybrid fiber and anti-UV nanoparticles)
A high-density polyethylene composite material for a floating photovoltaic floating body comprises the following raw materials in parts by weight:
Ethylene-butene copolymer 18
Auxiliary agent 1
Wherein the density of the ethylene-butylene copolymer is 0.920g/cm 3 The melt flow rate of 2.16kg at 230 ℃ was 1.25g/10min.
Wherein the auxiliary agent is a mixture of a lubricant and a coloring agent.
The invention further provides a preparation method of the high-density polyethylene composite material for the floating photovoltaic floating body, which comprises the following steps:
weighing 75wt% of polyethylene resin according to the weight parts of the raw materials, mixing for 20min at the speed of 500r/min, and then carrying out melt extrusion granulation at the temperature of 230 ℃ by using a double-screw extruder to obtain first intermediate granules.
Weighing the rest polyethylene resin and the ethylene-butylene copolymer according to the weight parts of the raw materials, mixing for 10min at the speed of 800r/min, and then carrying out melt extrusion granulation at the temperature of 220 ℃ by using a double-screw extruder to obtain second intermediate granules.
Weighing the auxiliary agent according to the weight parts of the raw materials, mixing the auxiliary agent with the first intermediate material and the second intermediate material, and then melting and extruding the mixture at 225 ℃ by using a double-screw extruder to obtain the high-density polyethylene composite material for the floating type photovoltaic floating body.
Comparative example 2 (with hybrid fibers and without UV-resistant nanoparticles)
A high-density polyethylene composite material for a floating photovoltaic floating body comprises the following raw materials in parts by weight:
wherein the density of the ethylene-butylene copolymer is 0.920g/cm 3 The melt flow rate of 2.16kg at 230 ℃ was 1.25g/10min.
Wherein the auxiliary agent is a mixture of a lubricant and a coloring agent.
The preparation method of the hybrid bamboo fiber comprises the following steps:
(1) Ultrasonically dispersing bamboo fibers in 1g/L caffeic acid solution, adjusting the pH to 8.5, stirring for 5 hours, filtering, washing and drying to obtain the caffeic acid coated bamboo fibers.
(2) Further, the caffeic acid-coated bamboo fiber is added into the nano calcium phosphate dispersion liquid, and is stirred for 2.5 hours to prepare the bamboo fiber deposited by the nano calcium phosphate.
(3) Further, adding KH171 into the dispersion of bamboo fibers deposited with nano calcium phosphate, stirring for 2h, filtering, washing, and drying to obtain hybrid bamboo fibers.
Wherein the length of the bamboo fiber is 6.5mm.
Wherein the weight ratio of Cheng Zhongzhu fiber prepared from the hybrid bamboo fiber, nano calcium phosphate, KH171 and caffeic acid solution is 1.5:1:1.5:100.
the invention further provides a preparation method of the high-density polyethylene composite material for the floating photovoltaic floating body, which comprises the following steps:
weighing 75wt% of polyethylene resin and the hybrid bamboo fiber according to the weight parts of the raw materials, mixing for 20min at the speed of 500r/min, and then carrying out melt extrusion granulation at the temperature of 230 ℃ by using a double-screw extruder to obtain first intermediate granules.
Weighing the rest polyethylene resin and the ethylene-butylene copolymer according to the weight parts of the raw materials, mixing for 10min at the speed of 800r/min, and then carrying out melt extrusion granulation at the temperature of 220 ℃ by using a double-screw extruder to obtain second intermediate granules.
Weighing the auxiliary agent according to the weight parts of the raw materials, mixing the auxiliary agent with the first intermediate material and the second intermediate material, and then carrying out melt extrusion at 225 ℃ by using a double-screw extruder to obtain the high-density polyethylene composite material for the floating photovoltaic floating body.
Comparative example 3 (without hybrid fibers and with UV resistant nanoparticles)
A high-density polyethylene composite material for a floating photovoltaic floating body comprises the following raw materials in parts by weight:
wherein the density of the ethylene-butylene copolymer is 0.920g/cm 3 The melt flow rate of 2.16kg at 230 ℃ was 1.25g/10min.
Wherein the auxiliary agent is a mixture of a lubricant and a coloring agent.
The preparation method of the uvioresistant nano particle comprises the following steps: dispersing and dissolving tannic acid in a mixed solution of ethanol and water, adding ammonia water to adjust the pH of the solution to 9.5, stirring for 10 hours, centrifuging the solution, and drying to obtain the anti-ultraviolet nanoparticles.
The invention further provides a preparation method of the high-density polyethylene composite material for the floating photovoltaic floating body, which comprises the following steps:
weighing 75wt% of polyethylene resin according to the weight parts of the raw materials, mixing for 20min at the speed of 500r/min, and then carrying out melt extrusion granulation at the temperature of 230 ℃ by using a double-screw extruder to obtain first intermediate granules.
Weighing the rest polyethylene resin, the ethylene-butylene copolymer and the uvioresistant nano particles according to the weight parts of the raw materials, mixing for 10min at 800r/min, and then performing melt extrusion granulation at 220 ℃ by using a double-screw extruder to obtain second intermediate particles.
Weighing the auxiliary agent according to the weight parts of the raw materials, mixing the auxiliary agent with the first intermediate material and the second intermediate material, and then carrying out melt extrusion at 225 ℃ by using a double-screw extruder to obtain the high-density polyethylene composite material for the floating photovoltaic floating body.
Test examples
The high density polyethylene composite materials prepared in examples 1-3 and comparative examples 1-3 are subjected to performance test, wherein the tensile property is tested according to the standard GB/T1040.3-2006, and the ultraviolet radiation intensity is 600W/m 2 And the cumulative exposure dose of the 1mm thick sample is 400kWh/m 2 . The results are shown in table 1:
TABLE 1 comparison of Performance before and after UV irradiation of polyethylene composites
The invention aims to provide a polyethylene floating body material with high strength and excellent aging resistance, namely, the polyethylene floating body material is expected to keep the mechanical property unchanged or slowly decline under the outdoor long-term illumination in a water environment. Doping is a conventional means for improving mechanical properties such as polyethylene, and the mechanical properties are to examine strength (tensile breaking stress) and strain (breaking nominal strain) at the same time, which are generally not compatible, and can be obtained from table 1, as shown in comparative example 2, compared with comparative example 1, the tensile breaking stress can be actually improved by adding the hybrid fiber, but at the same time, the breaking nominal strain is reduced. Comparative example 3 shows that the mechanical properties can be improved by adding the anti-ultraviolet nano particles, but the improvement of the strength (tensile breaking stress) has no influence on the strain (breaking nominal strain). It is therefore a technical challenge in the art to be able to increase both strength and strain.
After uv irradiation (simulating outdoor long-time illumination), comparative example 2 has slightly better intensity than comparative example 1 and similar strain to comparative example 1. It was demonstrated that the addition of the hybrid fibers was not sufficient to alter the mechanical retention in the outdoor environment over long periods of time with light. Comparative example 3 has better strength and strain than comparative example 2 due to the addition of the anti-uv nanoparticles, and has better strength and strain than comparative example 1. Therefore, ultraviolet irradiation is an absolute factor for destroying plastics and the like, and the problem in the field of how to prevent aging and avoid the reduction of mechanical properties under long-term irradiation is solved.
Before the ultraviolet irradiation, the strength and the strain of the example 1, the example 2 and the example 3 are all larger than those of the comparative example 1, the comparative example 2 and the comparative example 3, namely the example 1, the example 2 and the example 3 are not only increased in strength but also increased in strain compared with the comparative example 1, which shows that the mechanical property of the polyethylene composite material can be remarkably improved by simultaneously adding the hybrid natural fiber and the ultraviolet-resistant nano particle. After the ultraviolet irradiation, the tensile fracture stress and the fracture nominal strain of the comparative example 1 and the comparative example 2 are obviously reduced, and the phenomena of color change and light micronization appear, which shows that the polyethylene composite material has poor ultraviolet aging resistance. After the hybrid fiber and the anti-ultraviolet nanoparticles are added simultaneously, the strength and the strain of the polyethylene composite material are slightly reduced, and the appearance shape of the polyethylene composite material is not changed, so that the anti-ultraviolet aging performance of the polyethylene composite material can be improved by adding the anti-ultraviolet nanoparticles. Meanwhile, example 3 also shows that the mechanical properties are reduced to some extent when the hybrid fiber is added without the addition of the auxiliary agent, but the mechanical properties are not obvious, which shows that the auxiliary agent does not act absolutely.
The above results thus demonstrate that examples 1 and 2 show that in the presence of both hybrid natural fibers and anti-uv nanoparticles, a synergistic effect (both strength and strain increase, while anti-aging effect is significant) occurs, and that the two do not act independently, but rather cooperate with each other, producing unexpected technical effects.
Although the invention has been described in detail hereinabove with respect to specific embodiments thereof, it will be apparent to those skilled in the art that many modifications and variations are possible in light of the above teaching. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (8)
1. The high-density polyethylene composite material for the floating photovoltaic floating body is characterized by comprising the following raw materials in parts by weight: 100 parts of polyethylene resin, 15-25 parts of vinyl copolymer, 3236 parts of hybrid natural fiber, 5262 parts of anti-ultraviolet nano particles, 5262 parts of auxiliary agent, and 3763 parts of zxft 3763 parts;
the above-mentioned poly(s) are polymerizedThe density of the ethylene resin is 1.015 to 1.035g/cm 3 A melt flow rate of 0.4 to 0.7g/10min at 230 ℃ of 2.16 kg;
the vinyl copolymer is a copolymer of two vinyl monomers such as ethylene, propylene, octene and the like, and the density is 0.905 to 0.925g/cm 3 The melt flow rate of 2.16kg at 230 ℃ is 1.1 to 1.3g/10min;
the auxiliary agent is one or a mixture of more of a lubricant, an antioxidant and a coloring agent.
2. The high-density polyethylene composite material for the floating photovoltaic float according to claim 1, is prepared from the following raw materials in parts by weight: 100 parts of polyethylene resin, 18 to 22 parts of vinyl copolymer, 3238 parts of hybrid natural fiber, 3238 parts of anti-ultraviolet nano particles and 3262 parts of auxiliary agent.
3. The high-density polyethylene composite material for the floating photovoltaic float according to claim 1 or 2, characterized in that the hybrid natural fiber is prepared by the following steps:
(1) Ultrasonically dispersing natural fibers in 1g/L caffeic acid solution, adjusting the pH to 8.5, stirring for 4-5h, filtering, washing and drying to obtain caffeic acid coated natural fibers;
the natural fiber is one or a mixture of several of fibrilia, bamboo fiber, wood fiber and cotton fiber, and the length of the natural fiber is 5-8mm;
(2) Adding the natural fiber coated with the caffeic acid into the inorganic nanoparticle dispersion liquid, and stirring for 2-3h to prepare natural fiber deposited with inorganic nanoparticles;
wherein the inorganic nano particles are one or a mixture of more of nano calcium carbonate, nano calcium phosphate, nano titanium dioxide and the like;
(3) Adding a silane coupling agent into the dispersion liquid of the natural fiber deposited by the inorganic nanoparticles, stirring for 1-2h, filtering, washing and drying to obtain hybrid natural fiber;
wherein the silane coupling agent is one or a mixture of two of KH151, KH171 and the like.
4. The high-density polyethylene composite material for the floating photovoltaic float according to claim 3, wherein the weight ratio of the natural fiber, the inorganic nanoparticles, the silane coupling agent and the caffeic acid solution in the preparation process of the hybrid natural fiber is 1-2:0.5-1:1-2:100.
5. the high-density polyethylene composite material for the floating photovoltaic floating body as claimed in claim 1, wherein the preparation method of the anti-ultraviolet nanoparticles comprises: dispersing and dissolving the catechol monomers in a mixed solution of ethanol and water, adjusting the pH of the solution to 9.5, stirring for 8-10h, centrifuging the solution, and drying to obtain the anti-ultraviolet nanoparticles.
6. The high-density polyethylene composite material for the floating photovoltaic floating body as claimed in claim 1, wherein the weight ratio of the catechol monomer, ethanol, water and the like in the preparation process of the anti-ultraviolet nanoparticles is 0.5:40:100.
7. the high-density polyethylene composite material for the floating photovoltaic floating body as claimed in claim 5 or 6, wherein the catechol monomer is one or a mixture of dopamine, tannic acid, lignin, caffeic acid and the like.
8. A method of making a high density polyethylene composite for a floating photovoltaic float according to any one of claims 1 to 7, comprising:
(1) Weighing 70-80wt% of polyethylene resin and hybrid natural fiber according to the weight parts of the raw materials, mixing for 20min at 500r/min, and then carrying out melt extrusion granulation at 225-245 ℃ by using a double-screw extruder to obtain first intermediate granules;
(2) Weighing the rest polyethylene resin, vinyl polymer and uvioresistant nano particles according to the weight parts of the raw materials, mixing for 10min at the speed of 800r/min, and then carrying out melt extrusion granulation at the temperature of 215-230 ℃ by using a double-screw extruder to obtain second intermediate particles;
(3) Weighing the auxiliary agent according to the weight parts of the raw materials, mixing the auxiliary agent with the first intermediate material and the second intermediate material, and then performing melt extrusion at 210-230 ℃ by using a double-screw extruder to obtain the high-density polyethylene composite material for the floating photovoltaic floating body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211074765.0A CN115403847B (en) | 2022-09-02 | 2022-09-02 | High-strength aging-resistant polyethylene composite material for photovoltaic floating body and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211074765.0A CN115403847B (en) | 2022-09-02 | 2022-09-02 | High-strength aging-resistant polyethylene composite material for photovoltaic floating body and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115403847A true CN115403847A (en) | 2022-11-29 |
| CN115403847B CN115403847B (en) | 2023-07-25 |
Family
ID=84163005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211074765.0A Active CN115403847B (en) | 2022-09-02 | 2022-09-02 | High-strength aging-resistant polyethylene composite material for photovoltaic floating body and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115403847B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110229406A (en) * | 2019-06-24 | 2019-09-13 | 中国石油化工股份有限公司 | A kind of floating on water photovoltaic plant floating body polyethylene special-purpose material and its application |
| CN111253661A (en) * | 2020-03-04 | 2020-06-09 | 合肥圆燃新材料有限公司 | High-strength anti-aging polyethylene composite material for photovoltaic floating body and preparation method thereof |
| WO2022052410A1 (en) * | 2020-09-09 | 2022-03-17 | 金发科技股份有限公司 | Anti-ultraviolet pbt composite, preparation method therefor, and use thereof |
-
2022
- 2022-09-02 CN CN202211074765.0A patent/CN115403847B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110229406A (en) * | 2019-06-24 | 2019-09-13 | 中国石油化工股份有限公司 | A kind of floating on water photovoltaic plant floating body polyethylene special-purpose material and its application |
| CN111253661A (en) * | 2020-03-04 | 2020-06-09 | 合肥圆燃新材料有限公司 | High-strength anti-aging polyethylene composite material for photovoltaic floating body and preparation method thereof |
| WO2022052410A1 (en) * | 2020-09-09 | 2022-03-17 | 金发科技股份有限公司 | Anti-ultraviolet pbt composite, preparation method therefor, and use thereof |
Non-Patent Citations (1)
| Title |
|---|
| 雷文;上官国锦;徐逸;余旺旺;: "热氧老化对高密度聚乙烯/木粉吸水性能的影响", 南京林业大学学报(自然科学版), no. 01 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115403847B (en) | 2023-07-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104312181B (en) | Polyhydroxy lignin/silicon dioxide composite nano particle and preparation method thereof | |
| US9695318B2 (en) | Inorganic/lignin type polymer composite nanoparticles, preparation method therefor and application thereof | |
| CN101550309B (en) | II-type polymer cement waterproofing coating modified by nano materials and preparation method thereof | |
| CN106220996B (en) | Silicon carbon black/composite polyolefine material preparation method | |
| CN112457740B (en) | Coupling agent modified nano-cellulose grafted epoxy resin composite water-based paint and preparation method thereof | |
| CN104087029B (en) | A kind of preparation method of silicone sealant special active calcium carbonate | |
| CN105419012B (en) | A kind of preparation method of Cellulose nanocrystal and its rubber composite based on stalk | |
| CN101671440B (en) | Chitosan-urea resin microcapsule and synthesis method thereof | |
| CN107287956B (en) | Method for preparing nano-cellulose by combining enzyme pretreatment with mechanical grinding | |
| CN103772990A (en) | Preparation method of room temperature sulfurated silicon rubber material co-enhanced by lignin and white black carbon | |
| CN104530504A (en) | Rubber composite material of waste cotton material-based nano-microcrystalline cellulose and preparation method of rubber composite material | |
| CN104194364A (en) | Composite asphalt modifier, composite modified asphalt and production process of composite asphalt modifier and composite modified asphalt | |
| Wang et al. | One-pot preparation of hydrophobic lignin/SiO2 nanoparticles and its reinforcing effect on HDPE | |
| CN115124776A (en) | Natural bamboo fiber modified PE or PP composite material and preparation method thereof | |
| CN111253661A (en) | High-strength anti-aging polyethylene composite material for photovoltaic floating body and preparation method thereof | |
| CN105949565A (en) | Fly ash-containing LDPE (low-density polyethylene) plastic masterbatch and preparation method thereof | |
| CN111253603B (en) | Microcrystalline cellulose reinforced biaxially oriented polylactic acid film and preparation method thereof | |
| CN115403847B (en) | High-strength aging-resistant polyethylene composite material for photovoltaic floating body and preparation method thereof | |
| CN113025073B (en) | Lignin/titanium dioxide hybrid composite nano material and preparation method and application thereof | |
| CN107880320A (en) | A kind of anti-stress cracking degradation material and preparation method thereof | |
| CN113943479A (en) | Modified thermoplastic reinforced fiber material and preparation method thereof | |
| CN105440325A (en) | Heatproof hydrophobically modified starch PVC composite degradable plastic and preparation method thereof | |
| CN105440327A (en) | Antibiotic and hydrophobic modified starch PVC composite degradable plastic and preparation method thereof | |
| CN109401095A (en) | A kind of preparation process to improve the cable grain of finished cable toughness | |
| CN110734589A (en) | Method for preparing emulsion polymerized styrene butadiene rubber from modified graphene |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |