CN104774389A - Method for preparing polypropylene-based wood-plastic composite material by using cotton stalks - Google Patents
Method for preparing polypropylene-based wood-plastic composite material by using cotton stalks Download PDFInfo
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- CN104774389A CN104774389A CN201510199927.7A CN201510199927A CN104774389A CN 104774389 A CN104774389 A CN 104774389A CN 201510199927 A CN201510199927 A CN 201510199927A CN 104774389 A CN104774389 A CN 104774389A
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- polypropylene
- plastic composite
- composite material
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- cotton stem
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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
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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
- 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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- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a method for preparing a polypropylene-based wood-plastic composite material by using cotton stalks. The method comprises the steps: soaking the cotton stalks into a sodium hydroxide aqueous solution for alkalization treatment, then, washing with distilled water, then, drying, and carrying out mechanical crushing, so as to prepare cotton stalk powder; weighing raw materials, namely polypropylene, a dispersion lubricant, a coupling agent, an antioxidant and cotton stalk powder, according to the following mass ratio of (90-110): (8-14): (2-4): (0.2-0.8): (90-110); melting and plasticizing polypropylene in a plastic mixing mill, then, sequentially adding the antioxidant, the cotton stalk powder, the dispersion lubricant and the coupling agent, carrying out tight milling for 5-7 times, and then, sheeting, so as to prepare a plastic sheet material; pressing the plastic sheet material on a plate vulcanizing machine, thereby preparing the polypropylene-based wood-plastic composite material. According to the method disclosed by the invention, the operation is simple, and large-scale popularization and application are facilitated; due to the adding of various processing aids, the compatibility between polypropylene matrix resin and wood flour is improved, so that the processability and related mechanical properties of the wood-plastic composite material are improved.
Description
Technical field
The invention belongs to wood plastic composite preparing technical field, particularly a kind of method utilizing cotton stem to prepare polypropylene base wood-plastic composite material.
Background technology
Containing wood powder and plastics in wood plastic composite, therefore matrix material has had the advantage of timber and plastics concurrently: 1. good processing characteristics.Wood plastic composite includes plastics and fiber, therefore, has the processing characteristics that same timber is similar, can saw, can follow closely, can dig, and use carpenter's utensil to complete, and nail-holding ability is obviously better than other synthetic materialss.Mechanical property is better than wood materials.Nail-holding ability is generally 3 times of timber, is 5 times of shaving board.2. good strength property.Wood plastic composite includes plastics, thus has good Young's modulus.In addition, due to including fiber and through fully mixing with plastics, thus there is the resistance to compression suitable with hardwood, the physical and mechanical properties such as counter-bending, and its wearing quality is obviously better than normal wood material.Surface hardness is high, is generally 2 ~ 5 times of timber.3. there is water-fast, corrosion resistant performance, long service life.Wood-plastic material and products thereof, can anti-strong acid-base, water-fast, corrosion-resistant compared with timber, and not bacterial growth, is not easily damaged by worms, not long fungi.Long service life, can reach more than 50 years.4. excellent adjustable performance.By auxiliary agent, the changes such as plastics can be polymerized, foam, solidify, modification, thus the characteristic such as density, intensity changing Wood-plastic material, can also reach anti-aging, anti-electrostatic, the particular requirement such as fire-retardant.Because wood plastic composite has so many performance, just decide it will be widely used.1. construction industry.The floor of making by Wood Fiber Composites than superior many in low wood fibre board performance at present, not breathing, waterproof, surface aesthetic.If meet material for multilayer coextrusion section bar, internal layer adopts reclaimed materials, and outer employing virgin material, the every mechanical property of the goods made can compare favourably with hardwood products.2. the application of automobile industry.In recent years, Wood plastic boards, with its rational price, superior performance, is applied and is increased in automobile decoration material, as automobile door-plate, after put thing case, luggage case sidewall, seat plate etc.3. other industry.Except traditional industry, the Application Areas of matrix material constantly expands, started at present apply as pallet, flowerpot, handle for tool, office appliance, attack the engine components such as fast highway route marker, acoustic board and audio amplifier.
Cotton stem abundant raw material is cheap, is a kind of important agricultural wastes, is also that one has multiduty reproducible Biological resources, can does the wood powder of wood plastic composite after pulverizing.From the angle of raw materials for production, wood plastic composite slows down and eliminates the public hazards pollution of plastic refuse, also eliminates cotton stem and piles up and burn the pollution brought to environment.
Along with the development of plastics industry, a large amount of waste or used plastics becomes rubbish, causes environmental pollution.In actual life, the large percentage that waste and old polypropylene occupies, and reclaim easily, price is lower.Therefore it becomes a kind of plastic raw materials of wood plastic composite.
Summary of the invention
The object of this invention is to provide a kind of method utilizing cotton stem to prepare polypropylene base wood-plastic composite material.
Concrete steps are:
(1) cotton stem is immersed in mass percent concentration is alkalinisation treatment 2 ~ 3 hours in the aqueous sodium hydroxide solution of 15 ~ 25%, and alkalization temperature is 30 ~ 40 DEG C, obtained alkalinisation treatment cotton stem.
(2) alkalinisation treatment cotton stem distilled water wash step (1) obtained 3 ~ 4 times, the alkali on removing bar and other impurity, then drying treatment, through mechanical disintegration, obtained particle diameter is 50 ~ 70 object cotton stem powder.
(3) raw material is taken according to following mass ratio, polypropylene: dispersed lubricant: coupling agent: oxidation inhibitor: cotton stem powder=90 ~ 110:8 ~ 14:2 ~ 4:0.2 ~ 0.8:90 ~ 110 that step (2) is obtained.
(4) the polypropylene fusion plastification on the plastics processing mill of 170 ~ 180 DEG C step (3) taken, then oxidation inhibitor, cotton stem powder, dispersed lubricant and coupling agent that step (3) takes is added successively, slice after thin-pass 5 ~ 7 times, obtained plasticized sheet material.
(5) vulcanizing press is heated, the temperature arranging top plate is 170 ~ 180 DEG C, the temperature of lower bolster is 170 ~ 180 DEG C, treat that temperature rises to the temperature of setting, constant temperature 10 minutes, to be then placed on vulcanizing press preheating 3 minutes, pressurization 9 ~ 11Mpa mold pressing 4 minutes by plasticized sheet material obtained for step (4), be placed in pressurization 9 ~ 11Mpa on normal temperature vulcanizing press again to cold pressing 6 minutes, i.e. obtained polypropylene base wood-plastic composite material.
Described dispersed lubricant is containing the mixture of aromatic hydrocarbons, modified alkyl resol and fatty alcohol and fatty acid ester.
Described coupling agent is one or both in isocyanic ester and maleic anhydride.
Described oxidation inhibitor is two (3,5-, tri-grades of butyl-4-hydroxy phenyls) thioethers.
The inventive method is simple to operate, is easy to large-scale promotion application, and adding by various processing aid, improve the consistency between polypropylene matrix resin and wood powder, thus improve the processing characteristics of wood plastic composite and relevant mechanical property.
Embodiment
embodiment:
(1) cotton stem is immersed in mass percent concentration is alkalinisation treatment 2.5 hours in the aqueous sodium hydroxide solution of 20%, and alkalization temperature is 35 DEG C, obtained alkalinisation treatment cotton stem.
(2) alkalinisation treatment cotton stem distilled water wash step (1) obtained 4 times, the alkali on removing bar and other impurity, then drying treatment, through mechanical disintegration, obtained particle diameter is 60 object cotton stem powder.
(3) raw material is taken according to following mass ratio, polypropylene: dispersed lubricant: coupling agent: oxidation inhibitor: cotton stem powder=100:11.5:3:0.5:100 that step (2) is obtained.
(4) the polypropylene fusion plastification on the plastics processing mill of 175 DEG C step (3) taken, then oxidation inhibitor, cotton stem powder, dispersed lubricant and coupling agent that step (3) takes is added successively, slice after thin-pass 6 times, obtained plasticized sheet material.
(5) vulcanizing press is heated, the temperature arranging top plate is 175 DEG C, the temperature of lower bolster is 175 DEG C, treat that temperature rises to the temperature of setting, constant temperature 10 minutes, to be then placed on vulcanizing press preheating 3 minutes, pressurization 10Mpa mold pressing 4 minutes by plasticized sheet material obtained for step (4), be placed in 10Mpa that normal temperature vulcanizing press pressurizes again to cold pressing 6 minutes, i.e. obtained polypropylene base wood-plastic composite material.
Described dispersed lubricant contains the mixture D eoflow A of 5 mass parts aromatic hydrocarbons S-105,5 mass parts modified alkyl resol TKM-M80 and 1.5 mass parts fatty alcohol and fatty acid ester.
Described coupling agent is the mixture of 1.5 mass parts isocyanic ester and 1.5 mass parts maleic anhydrides.
Described oxidation inhibitor is two (3,5-, tri-grades of butyl-4-hydroxy phenyls) thioethers.
The flexural strength of the polypropylene base wood-plastic composite material that the present embodiment obtains is 47.356MPa, and modulus in flexure is 4.597GPa, and shock strength is 18.142 KJ/m
2, tensile strength is 21.004 MPa, and torque capacity is 22.02Nm, and balancing moment is 4.61Nm, shows comparatively excellent mechanical property and processing characteristics.
Claims (1)
1. utilize cotton stem to prepare a method for polypropylene base wood-plastic composite material, it is characterized in that concrete steps are:
(1) cotton stem being immersed in mass percent concentration is alkalinisation treatment 2 ~ 3 hours in the aqueous sodium hydroxide solution of 15 ~ 25%, and alkalization temperature is 30 ~ 40 DEG C, obtained alkalinisation treatment cotton stem;
(2) alkalinisation treatment cotton stem distilled water wash step (1) obtained 3 ~ 4 times, the alkali on removing bar and other impurity, then drying treatment, through mechanical disintegration, obtained particle diameter is 50 ~ 70 object cotton stem powder;
(3) raw material is taken according to following mass ratio, polypropylene: dispersed lubricant: coupling agent: oxidation inhibitor: cotton stem powder=90 ~ 110:8 ~ 14:2 ~ 4:0.2 ~ 0.8:90 ~ 110 that step (2) is obtained;
(4) the polypropylene fusion plastification on the plastics processing mill of 170 ~ 180 DEG C step (3) taken, then oxidation inhibitor, cotton stem powder, dispersed lubricant and coupling agent that step (3) takes is added successively, slice after thin-pass 5 ~ 7 times, obtained plasticized sheet material;
(5) vulcanizing press is heated, the temperature arranging top plate is 170 ~ 180 DEG C, the temperature of lower bolster is 170 ~ 180 DEG C, treat that temperature rises to the temperature of setting, constant temperature 10 minutes, to be then placed on vulcanizing press preheating 3 minutes, pressurization 9 ~ 11Mpa mold pressing 4 minutes by plasticized sheet material obtained for step (4), be placed in pressurization 9 ~ 11Mpa on normal temperature vulcanizing press again to cold pressing 6 minutes, i.e. obtained polypropylene base wood-plastic composite material;
Described dispersed lubricant is containing the mixture of aromatic hydrocarbons, modified alkyl resol and fatty alcohol and fatty acid ester;
Described coupling agent is one or both in isocyanic ester and maleic anhydride;
Described oxidation inhibitor is two (3,5-, tri-grades of butyl-4-hydroxy phenyls) thioethers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510199927.7A CN104774389A (en) | 2015-04-25 | 2015-04-25 | Method for preparing polypropylene-based wood-plastic composite material by using cotton stalks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510199927.7A CN104774389A (en) | 2015-04-25 | 2015-04-25 | Method for preparing polypropylene-based wood-plastic composite material by using cotton stalks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104774389A true CN104774389A (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510199927.7A Pending CN104774389A (en) | 2015-04-25 | 2015-04-25 | Method for preparing polypropylene-based wood-plastic composite material by using cotton stalks |
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| CN (1) | CN104774389A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995562A (en) * | 2017-05-23 | 2017-08-01 | 南宁市钱隆汽车租赁有限公司 | Audio amplifier plastic material |
-
2015
- 2015-04-25 CN CN201510199927.7A patent/CN104774389A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 刘婷等: ""碱处理对SF/PP木塑复合材料力学性能的影响"", 《化工新型材料》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106995562A (en) * | 2017-05-23 | 2017-08-01 | 南宁市钱隆汽车租赁有限公司 | Audio amplifier plastic material |
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Application publication date: 20150715 |
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