CN117363046A - PP material and preparation method thereof - Google Patents
PP material and preparation method thereof Download PDFInfo
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- CN117363046A CN117363046A CN202311427574.2A CN202311427574A CN117363046A CN 117363046 A CN117363046 A CN 117363046A CN 202311427574 A CN202311427574 A CN 202311427574A CN 117363046 A CN117363046 A CN 117363046A
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- 239000000463 material Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 241000209094 Oryza Species 0.000 claims abstract description 65
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 65
- 235000009566 rice Nutrition 0.000 claims abstract description 65
- 239000002994 raw material Substances 0.000 claims abstract description 32
- 239000010903 husk Substances 0.000 claims abstract description 29
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 24
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 14
- 239000002131 composite material Substances 0.000 claims abstract description 14
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 14
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000008117 stearic acid Substances 0.000 claims abstract description 14
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 13
- 239000007822 coupling agent Substances 0.000 claims abstract description 12
- 239000002861 polymer material Substances 0.000 claims abstract description 8
- 239000004743 Polypropylene Substances 0.000 claims description 53
- 239000011261 inert gas Substances 0.000 claims description 29
- 238000002156 mixing Methods 0.000 claims description 25
- 238000003763 carbonization Methods 0.000 claims description 23
- 239000004698 Polyethylene Substances 0.000 claims description 20
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000009775 high-speed stirring Methods 0.000 claims description 5
- 238000010000 carbonizing Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000011056 performance test Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000002028 Biomass Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007781 pre-processing Methods 0.000 abstract description 2
- 239000004566 building material Substances 0.000 abstract 1
- 239000005022 packaging material Substances 0.000 abstract 1
- 229920001155 polypropylene Polymers 0.000 description 36
- 239000000945 filler Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- -1 Polypropylene Polymers 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- 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
- C08L2205/03—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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (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 material preparation, and discloses a PP material, which comprises the following components in percentage by weight: rice husk: 45%, pp+pe:30% of calcium carbonate: 15%, POE:5% of coupling agent: 1.5%, stearic acid: 2%, PE wax: 1.5%. By preprocessing the rice husks, the binding force between the rice husks and the high polymer material is improved, and the problems of layering, falling and the like in the processing process are avoided. The processing performance and mechanical properties of the composite material are optimized by selecting proper auxiliary components such as PE wax, stearic acid and the like. The composite material has excellent environmental protection, because the main raw material rice husk is a biomass material, the source is wide and renewable, and meanwhile, the production cost of the PP material is reduced. The composite material has good mechanical property and processability, and can be widely applied to various fields, such as packaging materials, building materials and the like.
Description
Technical Field
The invention relates to the technical field of preparation of high polymer materials, and particularly discloses a PP material and a preparation method thereof.
Background
Polypropylene (PP) is a widely used thermoplastic with good mechanical properties, wear resistance and chemical stability. However, pure PP materials have poor rigidity and heat resistance, limiting their application in certain fields. In order to improve the performance of the PP material, a method of adding a filler is generally adopted. Conventional fillers such as calcium carbonate, talc, etc., while improving rigidity and heat resistance of PP materials, may cause an increase in material cost and environmental pollution. Therefore, searching for a low-cost, environmentally friendly filler is a research hotspot.
The rice husk is a waste produced in the course of processing rice, and contains rich organic substances of cellulose and lignin, etc.. The rice husk is used as filler to be added into PP material, which can reduce material cost and is beneficial to environmental protection. However, the rice hulls have higher surface activity and poorer compatibility with the PP matrix, which easily leads to the performance degradation of the composite material. Therefore, how to improve the interfacial bonding strength between the rice husk and the PP matrix becomes a key for preparing the high-performance rice husk reinforced PP composite material.
Disclosure of Invention
The invention mainly provides a PP material and a preparation method thereof, which can solve the problems that the cost of the material is increased, the environment is polluted, the surface activity of rice hulls is higher, and the compatibility with a PP matrix is poor due to the fact that the traditional filler is counted in the process of preparing the PP material.
In order to solve the above technical problems, according to one aspect of the present invention, more specifically, a PP material comprises the following components: rice husk, PP, PE, calcium carbonate, POE, coupling agent, stearic acid and PE wax.
Further, the material specifically comprises the following components in percentage by weight: rice husk: 45%, pp+pe:30% of calcium carbonate: 15%, POE:5% of coupling agent: 1.5%, stearic acid: 2%, PE wax: 1.5%.
According to another aspect of the present invention, there is provided a method for preparing a PP material, which is based on the above raw material components of a PP material, comprising the steps of:
s1, preparing materials: according to the weight percentage, preparing rice husks, PP, PE, calcium carbonate, POE, a coupling agent, stearic acid and PE wax for standby;
s2, pretreatment of materials: cleaning the rice hulls prepared in the step S1, drying after cleaning, carbonizing the dried rice hulls to remove impurities and moisture in the rice hulls and improve the binding force of the rice hulls with a high polymer material;
s3, mixing: mixing the pretreated rice hulls with PP, PE, calcium carbonate, POE, a coupling agent, stearic acid and PE wax, and placing the mixed mixture into high-speed stirring equipment to stir at a certain speed so as to fully disperse the raw material components;
s4, melt blending: heating the materials mixed in the step S3, then carrying out melt blending, and introducing a certain amount of inert gas into the materials to fully mix and interweave the components in the materials;
s5, cooling and granulating: and cooling the composite material after melt blending, and after cooling to room temperature, putting the composite material into granulating equipment, so that the required PP material particles can be obtained.
Further, in the step S2, when the washed rice hulls are dried, the rice hulls are dried by adopting a hot air circulation mode, the washed rice hulls are dispersed and spread in a tray, then the tray is placed into hot air circulation drying equipment, and then the rice hulls are continuously dried for 15-20min at the temperature of 70-85 ℃.
Further, in S2, the specific process of carbonizing the dried rice husk is as follows: firstly, putting dried rice hulls into a carbonization furnace, filling inert gas into the carbonization furnace to isolate air, and then adjusting and setting carbonization temperature and carbonization time of the rice hulls:
wherein TP cz Is carbonization temperature, n is mass of filled inert gas, R is inert gas constant, T is absolute temperature of inert gas, V is inert gas volume, D is fire point of rice husk, W is water content in rice huskL is the rice husk amount, t cz For carbonization time, μ is the moisture evaporation rate.
Further, in S3, after the raw materials are put into the high-speed stirring apparatus, the raw materials are stirred at a high speed of 3000-5000rpm for 10-15min, and the raw materials are vibrated at a frequency of 800-1500Hz during the stirring, so that the respective raw materials can be sufficiently dispersed.
Further, in the step S4, the specific process of melt blending is as follows: firstly, heating the mixed raw materials to the following temperature:
wherein S is the total number of raw materials, r i For the melting point of each raw material, r max 、r min The melting points of the maximum and minimum raw materials, r PP Is the melting point of the PP material;
setting the rotating speed of the mixing equipment to 2500-3000rpm, and stirring and mixing for 20-33min at the rotating speed; and in the stirring process, circulating inert gas is introduced to promote the raw material components to be fully mixed and interweaved together.
Further, in the step S4, the inert gas is nitrogen, helium or a mixed gas of two gases, and the amount of the inert gas is as follows:
L lazy ＝((V-V stay )-(δ×T))/V stay
wherein L is lazy V is the volume of the mixing container, V is the total amount of the inert gas stay Delta is the expansion coefficient of the introduced inert gas, and T is the melting temperature.
Still further, the method further comprises: s6, performance detection: and performing various performance tests, such as tensile strength test, impact strength test, hardness test and the like, on the prepared PP material.
The PP material and the preparation method thereof have the beneficial effects that: by preprocessing the rice husks, the binding force between the rice husks and the high polymer material is improved, and the problems of layering, falling and the like in the processing process are avoided. The processing performance and mechanical properties of the composite material are optimized by selecting proper auxiliary components such as PE wax, stearic acid and the like. The composite material has excellent environmental protection, because the main raw material rice husk is a biomass material, the source is wide and renewable, and meanwhile, the production cost of the PP material is reduced. The composite material has good mechanical property, processability and low temperature resistance, has good flexibility, is beneficial to improving the molding effect of products, is more in place in molding, and can enable the edges and corners of the products to be adsorbed in place in plastic suction.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and detailed description.
FIG. 1 is a schematic flow chart of the method.
Detailed Description
The invention will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
According to one aspect of the present invention, there is provided a PP material comprising the following components in weight percent: rice husk: 45%, pp+pe:30% of calcium carbonate: 15%, POE:5% of coupling agent: 1.5%, stearic acid: 2%, PE wax: 1.5%.
According to another aspect of the present invention, as shown in fig. 1, there is provided a method for preparing a PP material, which is implemented based on the raw material components in the above PP material, and specifically includes the following steps:
first, preparing materials: according to the weight percentages, rice husks, PP, PE, calcium carbonate, POE, a coupling agent, stearic acid and PE wax are prepared for standby.
Secondly, pretreatment of materials: cleaning the rice hulls prepared in the first step, dispersing and spreading the cleaned rice hulls in a tray after the cleaning is finished, then placing the rice hulls in hot air circulation drying equipment, continuously drying the rice hulls for 15-20min at the temperature of 70-85 ℃, placing the dried rice hulls in a carbonization furnace after the drying is finished, filling inert gas into the carbonization furnace to isolate air, and then adjusting and setting the carbonization temperature and carbonization time of the rice hulls:
wherein TP cz Is carbonization temperature, n is mass of inert gas, R is inert gas constant, T is absolute temperature of inert gas, V is inert gas volume, D is fire point of rice husk, W is water content in rice husk, L is rice husk amount, T cz For carbonization time, μ is the moisture evaporation rate. The situation that the performance of the prepared PP material does not reach the standard due to insufficient carbonization or insufficient bonding force between the rice husk and other high polymer materials caused by excessive carbonization can be avoided by adjusting proper carbonization temperature and carbonization time. Impurities and moisture in the rice hulls can be removed through the operation, and the binding force between the rice hulls and the polymer materials can be improved.
Third step, mixing: mixing the pretreated rice hulls with PP, PE, calcium carbonate, POE, a coupling agent, stearic acid and PE wax, placing the mixture into high-speed stirring equipment, stirring the mixture at a high speed of 3000-5000rpm for 10-15min, and vibrating the raw materials at a frequency of 800-1500Hz in the stirring process, so that the raw materials can be fully dispersed.
Fourth step, melt blending: firstly, heating the materials mixed in the third step to the following temperature:
to ensure that all the raw material components in the mixture can be melted; wherein S is the total number of raw materials, r i For the melting point of each raw material, r max 、r min The melting points of the maximum and minimum raw materials, r PP Is the melting point of the PP material;
setting the rotating speed of the mixing equipment to 2500-3000rpm, and stirring and mixing for 20-33min at the rotating speed; and in the stirring process, circulating nitrogen or helium or mixed gas of two gases is introduced, wherein the introduced amount is as follows:
L lazy ＝((V-V stay )-(δ×T))/V stay
so as to promote the raw material components to be fully mixed and interweaved together; wherein L is lazy V is the volume of the mixing container, V is the total amount of the inert gas stay Delta is the expansion coefficient of the introduced inert gas, and T is the melting temperature.
Fifth step, cooling and granulating: and cooling the composite material after melt blending, and after cooling to room temperature, putting the composite material into granulating equipment, so that the required PP material particles can be obtained.
Sixth, performance detection: and performing various performance tests, such as tensile strength test, impact strength test, hardness test and the like, on the prepared PP material.
Of course, the above description is not intended to limit the invention, but rather the invention is not limited to the above examples, and variations, modifications, additions or substitutions within the spirit and scope of the invention will be within the scope of the invention.
Claims (9)
1. The PP material is characterized by comprising the following components: rice husk, PP, PE, calcium carbonate, POE, coupling agent, stearic acid and PE wax.
2. The PP material of claim 1, wherein: the material comprises the following components in percentage by weight: rice husk: 45%, pp+pe:30% of calcium carbonate: 15%, POE:5% of coupling agent: 1.5%, stearic acid: 2%, PE wax: 1.5%.
3. A method for preparing a PP material, characterized in that the method is based on the raw material components of a PP material according to any one of claims 1-2, comprising the steps of:
s1, preparing materials: according to the weight percentage, preparing rice husks, PP, PE, calcium carbonate, POE, a coupling agent, stearic acid and PE wax for standby;
s2, pretreatment of materials: cleaning the rice hulls prepared in the step S1, drying after cleaning, carbonizing the dried rice hulls to remove impurities and moisture in the rice hulls and improve the binding force of the rice hulls with a high polymer material;
s3, mixing: mixing the pretreated rice hulls with PP, PE, calcium carbonate, POE, a coupling agent, stearic acid and PE wax, and placing the mixed mixture into high-speed stirring equipment to stir at a certain speed so as to fully disperse the raw material components;
s4, melt blending: heating the materials mixed in the step S3, then carrying out melt blending, and introducing a certain amount of inert gas into the materials to fully mix and interweave the components in the materials;
s5, cooling and granulating: and cooling the composite material after melt blending, and after cooling to room temperature, putting the composite material into granulating equipment, so that the required PP material particles can be obtained.
4. A method for preparing a PP material according to claim 3, characterized in that: in the step S2, when the washed rice hulls are dried, the rice hulls are dried in a hot air circulation mode, the washed rice hulls are dispersed and spread in a tray, then the tray is placed in hot air circulation drying equipment, and then the rice hulls are continuously dried for 15-20min at the temperature of 70-85 ℃.
5. A method for preparing a PP material according to claim 3, characterized in that: in the step S2, the carbonization treatment of the dried rice hulls comprises the following specific steps: firstly, putting dried rice hulls into a carbonization furnace, filling inert gas into the carbonization furnace to isolate air, and then adjusting and setting carbonization temperature and carbonization time of the rice hulls:
wherein TP cz Is carbonization temperature, n is mass of inert gas, R is inert gas constant, T is absolute temperature of inert gas, V is inert gas volume, D is fire point of rice husk, W is water content in rice husk, L is rice husk amount, T cz For carbonization time, μ is the moisture evaporation rate.
6. A method for preparing a PP material according to claim 3, characterized in that: in S3, after the raw materials are put into the high-speed stirring apparatus, the raw materials are stirred at a high speed of 3000-5000rpm for 10-15min, and the raw materials are vibrated at a frequency of 800-1500Hz during the stirring, so that the raw materials can be sufficiently dispersed.
7. A method for preparing a PP material according to claim 3, characterized in that: in the step S4, the specific process of melt blending is as follows: firstly, heating the mixed raw materials to the following temperature:
wherein S is the total number of raw materials, r i For the melting point of each raw material, r max 、r min The melting points of the maximum and minimum raw materials, r PP Is the melting point of the PP material;
setting the rotating speed of the mixing equipment to 2500-3000rpm, and stirring and mixing for 20-33min at the rotating speed; and in the stirring process, circulating inert gas is introduced to promote the raw material components to be fully mixed and interweaved together.
8. A method for preparing a PP material according to claim 3, characterized in that: in the step S4, the inert gas is nitrogen, helium or a mixed gas of the two gases, and the amount of the inert gas is as follows:
L lazy ＝((V-V stay )-(δ×T))/V stay
wherein L is lazy V is the volume of the mixing container, V is the total amount of the inert gas stay Delta is the expansion coefficient of the introduced inert gas, and T is the melting temperature.
9. A method for preparing a PP material according to claim 3, characterized in that: the method further comprises the steps of: s6, performance detection: and performing various performance tests, such as tensile strength test, impact strength test, hardness test and the like, on the prepared PP material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311427574.2A CN117363046A (en) | 2023-10-31 | 2023-10-31 | PP material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311427574.2A CN117363046A (en) | 2023-10-31 | 2023-10-31 | PP material and preparation method thereof |
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| CN117363046A true CN117363046A (en) | 2024-01-09 |
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| CN115651316A (en) * | 2022-11-23 | 2023-01-31 | 潮州明园新材料有限公司 | Rice hull filled PP composite material and preparation method thereof |
-
2023
- 2023-10-31 CN CN202311427574.2A patent/CN117363046A/en active Pending
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| CN113881140A (en) * | 2021-10-15 | 2022-01-04 | 长春工业大学 | PP/rice hull ash composite material and preparation method thereof |
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| 张庆法等: "稻壳/高密度聚乙烯复合材料与稻壳炭/高密度聚乙烯复合材料性能对比", 复合材料学报, vol. 35, no. 11, 30 November 2018 (2018-11-30), pages 1 * |
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