CN110628233A - Cross-linking reaction extruded wood-plastic profile and preparation method thereof - Google Patents
Cross-linking reaction extruded wood-plastic profile and preparation method thereof Download PDFInfo
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- CN110628233A CN110628233A CN201910932360.8A CN201910932360A CN110628233A CN 110628233 A CN110628233 A CN 110628233A CN 201910932360 A CN201910932360 A CN 201910932360A CN 110628233 A CN110628233 A CN 110628233A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H8/00—Macromolecular compounds derived from lignocellulosic materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/246—Intercrosslinking of at least two polymers
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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
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2397/00—Characterised by the use of lignin-containing materials
- C08J2397/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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- 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
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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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
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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
- C08L2312/00—Crosslinking
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- Wood Science & Technology (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a cross-linking reaction extruded wood-plastic section and a preparation method thereof, and the cross-linking reaction extruded wood-plastic section is characterized in that: the composite material comprises the following raw materials in parts by weight: 30-50 parts of high-density polyethylene, 50-70 parts of wood powder, 30-50 parts of alkaline solution, 30-50 parts of acidic solution, 4-8 parts of coupling agent, 3-6 parts of cross-linking agent, 2-3 parts of calcium carbonate and 1-3 parts of lubricating agent, and the wood-plastic section bar is simple in processing method and excellent in performance after being processed. The carboxyl group of the esterification reaction of the modified wood flour is similar to the group of the cross-linking agent, so that the good compatibility between the resin and the wood flour and the good fluidity during material processing are ensured, and the wood-plastic material with higher service performance is produced at lower production cost.
Description
Technical Field
The invention belongs to the technical field, and particularly relates to a cross-linking reaction extruded wood-plastic profile and a preparation method thereof.
Background
The wood-plastic composite material is a novel composite material and is mainly formed by compounding plant fibers, polyolefin resin, polypropylene or polyvinyl chloride and the like. The wood-plastic material has strong water resistance, can be recycled, belongs to an environment-friendly material, and has the same processing capacity as a wooden product. The disadvantages are that: the production cost is high, the density is high, generally 0.95-1.46g/cm3, and the density of the solid wood is 0.35-0.59g/cm 3. Compared with pure wood products, the preparation energy consumption is larger, 3-4 times higher than that of wood, the wood cannot be used as a structural material, and the service life of the wood is shortened by ultraviolet irradiation. The impact strength of the composite material is greatly reduced compared with that of a pure material.
The wood-plastic composite material has various functions and wide application, but is not easy to produce products with excellent comprehensive performance. The main reasons are: 1) the wood fiber of the raw material component contains a large amount of hydrophilic groups, namely hydroxyl groups, and has strong polarity. The common resin matrix is usually nonpolar and non-hydrophilic, so the compatibility between the wood fiber and the resin matrix is poor, the interface bonding strength is low, and the mechanical property is influenced; 2) because hydrogen bonds can be formed among hydroxyl groups, the interaction between wood fibers is strong, so that the dispersion of the wood fibers in a resin matrix is extremely poor, and uniform dispersion is difficult to achieve; 3) the biological filler is easy to degrade and discolor during molding and processing, and meanwhile, the high polymer material is also subjected to thermal degradation, so that the performance of the biological filler is reduced due to improper mixing and processing processes.
Disclosure of Invention
The invention aims to solve the problems, and provides a cross-linking reaction extruded wood-plastic section and a preparation method thereof.
The invention provides a cross-linking reaction extruded wood-plastic profile which comprises the following raw materials in parts by weight: 30-50 parts of high-density polyethylene, 50-70 parts of wood powder, 30-50 parts of alkaline solution, 30-50 parts of acidic solution, 4-8 parts of coupling agent, 3-6 parts of cross-linking agent, 2-3 parts of calcium carbonate and 1-3 parts of lubricating agent.
Preferably, the wood flour is one or more of poplar wood flour, bamboo powder and birch wood flour.
As a further preferable means, the alkaline solution is an aqueous NaOH solution having a concentration of 5 wt%.
As a further preferable means, the acidic solution is benzoic acid, acrylic acid in a molar ratio of 1:1 to prepare a 3 wt% aqueous solution.
As a further preferable means, the coupling agent is a silane coupling agent.
Preferably, the cross-linking agent is a mixture of p-phenylene diisocyanate and triallyl isocyanurate in a molar ratio of 1: 1.
As a further preferable means, the lubricant is one of calcium stearate or zinc stearate.
A preparation method of a cross-linking reaction extruded wood-plastic profile comprises the following specific steps:
1) wood powder modification: crushing wood flour to 50-100 meshes, soaking in a 5 wt% NaOH aqueous solution for 30-40h, filtering the soaked matter, drying the filtered matter to obtain dry powder, adding the powder and a silane coupling agent into an acidic solution mixed by benzoic acid and acrylic acid, stirring uniformly, and dissolving for 3-5h to obtain modified wood flour;
2) preparing plastic particles: adding high-density polyethylene into an extruder and extruding into plastic particles;
3) mixing and extrusion molding: uniformly mixing the modified wood powder obtained in the step 1, the plastic particles obtained in the step 2), calcium carbonate and a lubricant, and then adding the mixture into an extruder together for extrusion molding, wherein the barrel temperature of the extruder is 180 ℃ plus 210 ℃, and the mold temperature is 170 ℃ plus 180 ℃, so that the extrusion molding is completed.
The invention has the beneficial effects that: 1. according to the invention, wood flour is subjected to alkaline treatment and acidic treatment, so that esterification reaction is carried out on the wood flour, ester is produced by hydrophilic group hydroxyl, esterification reaction is carried out by using various acids, the wood flour is modified by adding a coupling agent, the polarity of the modified wood flour is changed, the compatibility between the wood flour and resin is enhanced, the wood flour is uniformly dispersed in the resin, and meanwhile, when the modified wood flour is mixed with the resin, two cross-linking agents with similar carboxyl groups, which are subjected to esterification reaction when the wood flour is modified, are added, so that good compatibility between the resin and the wood flour and good fluidity during material processing are ensured, and thus the wood-plastic service performance material with higher production cost is produced. 2. This application adopts the hydroxyl of two kinds of organic acids and wood flour to react, and very strong esterification reaction takes place for two kinds of organic acids homoenergetic and wood flour, and when wood flour after the modification mixes with the resin and is compatible, adds the cross-linking agent that two kinds of cross-linking abilities are stronger, and the group of cross-linking agent is similar with the organic acid that takes place esterification reaction for cross-linking effect obviously increases, and the cross-linking agent can play the effect that the tissue is linked, thereby reaches reinforcing toughening's effect.
Detailed Description
The invention is described in further detail below:
example 1
A cross-linking reaction extrusion wood-plastic section comprises the following raw materials in parts by weight: 30 parts of high-density polyethylene, 50 parts of poplar powder, 30 parts of 5 wt% NaOH aqueous solution, and a mixture of benzoic acid and acrylic acid according to a molar ratio of 1:1 to prepare 30 parts of 3 wt% aqueous solution, 4 parts of silane coupling agent, 3 parts of solution prepared by mixing p-phenyl diisocyanate and triallyl isocyanurate according to the molar ratio of 1:1, 2 parts of calcium carbonate and 1 part of calcium stearate.
A preparation method of a cross-linking reaction extruded wood-plastic profile comprises the following specific steps:
1) wood powder modification: crushing wood flour to 50 meshes, soaking in a 5 wt% NaOH aqueous solution for 30h, filtering the soaked matter, drying the filtered matter to obtain dry powder, then adding the powder and a silane coupling agent into an acidic solution mixed by benzoic acid and acrylic acid, stirring and uniformly mixing, and dissolving for 3h to obtain modified wood flour;
2) preparing plastic particles: adding high-density polyethylene into an extruder and extruding into plastic particles;
3) mixing and extrusion molding: uniformly mixing the modified wood powder obtained in the step 1, the plastic particles obtained in the step 2), calcium carbonate and calcium stearate, and then adding the mixture into an extruder together for extrusion molding, wherein the temperature of a cylinder of the extruder is 180 ℃, and the temperature of a die is 170 ℃, so that the extrusion molding is completed.
Table 1 results of performance testing of the product of example 1
Example 2
A cross-linking reaction extrusion wood-plastic section comprises the following raw materials in parts by weight: 30-50 parts of high-density polyethylene, 70 parts of bamboo powder, 30-50 parts of 5 wt% NaOH aqueous solution, and a mixture of benzoic acid and acrylic acid according to a molar ratio of 1:1 to prepare 50 parts of 3 weight percent aqueous solution, 8 parts of silane coupling agent, 6 parts of solution prepared by mixing p-phenyl diisocyanate and triallyl isocyanurate according to the molar ratio of 1:1, 3 parts of calcium carbonate and 3 parts of zinc stearate.
A preparation method of a cross-linking reaction extruded wood-plastic profile comprises the following specific steps:
1) wood powder modification: crushing wood flour to 100 meshes, soaking in a 5 wt% NaOH aqueous solution for 40h, filtering the soaked matter, drying the filtered matter to obtain dry powder, then adding the powder and a silane coupling agent into an acidic solution mixed by benzoic acid and acrylic acid, stirring and uniformly mixing, and dissolving for 5h to obtain modified wood flour;
2) preparing plastic particles: adding high-density polyethylene into an extruder and extruding into plastic particles;
3) mixing and extrusion molding: uniformly mixing the modified wood powder obtained in the step 1, the plastic particles obtained in the step 2), calcium carbonate and zinc stearate, and then adding the mixture into an extruder together for extrusion molding, wherein the temperature of a cylinder of the extruder is 210 ℃, and the temperature of a die is 180 ℃, so that the extrusion molding is completed.
Table 2 results of performance testing of the product of example 2
Example 3
A cross-linking reaction extrusion wood-plastic section comprises the following raw materials in parts by weight: 40 parts of high-density polyethylene, 60 parts of birch powder, 40 parts of 5 wt% NaOH aqueous solution, and 40 parts of benzoic acid and acrylic acid in a molar ratio of 1:1 to prepare 40 parts of 3 wt% aqueous solution, 6 parts of silane coupling agent, 5 parts of solution prepared by mixing p-phenyl diisocyanate and triallyl isocyanurate according to the molar ratio of 1:1, 2.5 parts of calcium carbonate and 2 parts of calcium stearate.
A preparation method of a cross-linking reaction extruded wood-plastic profile comprises the following specific steps:
1) wood powder modification: crushing wood flour to 70 meshes, soaking in a 5 wt% NaOH aqueous solution for 35h, filtering the soaked matter, drying the filtered matter to obtain dry powder, then adding the powder and a silane coupling agent into an acidic solution mixed by benzoic acid and acrylic acid, stirring and uniformly mixing, and dissolving for 4h to obtain modified wood flour;
2) preparing plastic particles: adding high-density polyethylene into an extruder and extruding into plastic particles;
3) mixing and extrusion molding: uniformly mixing the modified wood powder obtained in the step 1, the plastic particles obtained in the step 2), calcium carbonate and calcium stearate, and then adding the mixture into an extruder to perform extrusion molding, wherein the temperature of a cylinder of the extruder is 195 ℃ and the temperature of a die is 175 ℃, so that the extrusion molding is completed.
Table 3 results of performance testing of the product of example 3
Example 4
A cross-linking reaction extrusion wood-plastic section comprises the following raw materials in parts by weight: 30 parts of high-density polyethylene, 20 parts of poplar powder, 20 parts of bamboo powder, 20 parts of birch powder, 45 parts of 5 wt% NaOH aqueous solution, and a mixture of benzoic acid and acrylic acid according to a molar ratio of 1:1 to prepare 45 parts of 3 wt% aqueous solution, 6 parts of silane coupling agent, 5 parts of solution prepared by mixing p-phenyl diisocyanate and triallyl isocyanurate according to the molar ratio of 1:1, 3 parts of calcium carbonate and 2 parts of zinc stearate.
A preparation method of a cross-linking reaction extruded wood-plastic profile comprises the following specific steps:
1) wood powder modification: crushing wood flour to 80 meshes, soaking in a 5 wt% NaOH aqueous solution for 35h, filtering the soaked matter, drying the filtered matter to obtain dry powder, then adding the powder and a silane coupling agent into an acidic solution mixed by benzoic acid and acrylic acid, stirring and uniformly mixing, and dissolving for 4h to obtain modified wood flour;
2) preparing plastic particles: adding high-density polyethylene into an extruder and extruding into plastic particles;
3) mixing and extrusion molding: uniformly mixing the modified wood powder obtained in the step 1, the plastic particles obtained in the step 2), calcium carbonate and a lubricant, and then adding the mixture into an extruder together for extrusion molding, wherein the temperature of a cylinder of the extruder is 200 ℃, and the temperature of a die is 175 ℃, so that the extrusion molding is completed.
Table 4 results of performance testing of the product of example 4
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
The present invention is not limited to the above description of the embodiments, and those skilled in the art should, in light of the present disclosure, appreciate that many changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (8)
1. A cross-linking reaction extrusion wood-plastic section is characterized in that: the composite material comprises the following raw materials in parts by weight: 30-50 parts of high-density polyethylene, 50-70 parts of wood powder, 30-50 parts of alkaline solution, 30-50 parts of acidic solution, 4-8 parts of coupling agent, 3-6 parts of cross-linking agent, 2-3 parts of calcium carbonate and 1-3 parts of lubricating agent.
2. A cross-linking reaction extruded wood-plastic profile according to claim 1, wherein: the wood powder is one or more of poplar powder, bamboo powder and birch powder.
3. A cross-linking reaction extruded wood-plastic profile according to claim 1, wherein: the alkaline solution is a 5 wt% NaOH aqueous solution.
4. A cross-linking reaction extruded wood-plastic profile according to claim 1, wherein: the acid solution is prepared from benzoic acid and acrylic acid according to a molar ratio of 1:1 to prepare a 3 wt% aqueous solution.
5. A cross-linking reaction extruded wood-plastic profile according to claim 1, wherein: the coupling agent is a silane coupling agent.
6. A cross-linking reaction extruded wood-plastic profile according to claim 1, wherein: the cross-linking agent is prepared by mixing p-phenyl diisocyanate and triallyl isocyanurate according to the molar ratio of 1: 1.
7. A cross-linking reaction extruded wood-plastic profile according to claim 1, wherein: the lubricant is one of calcium stearate or zinc stearate.
8. A preparation method of a cross-linking reaction extrusion wood-plastic profile is characterized by comprising the following steps: the method comprises the following specific steps:
1) wood powder modification: crushing wood flour to 50-100 meshes, soaking in a 5 wt% NaOH aqueous solution for 30-40h, filtering the soaked matter, drying the filtered matter to obtain dry powder, adding the powder and a silane coupling agent into an acidic solution mixed by benzoic acid and acrylic acid, stirring uniformly, and dissolving for 3-5h to obtain modified wood flour;
2) preparing plastic particles: adding high-density polyethylene into an extruder and extruding into plastic particles;
3) mixing and extrusion molding: uniformly mixing the modified wood powder obtained in the step 1, the plastic particles obtained in the step 2), calcium carbonate and a lubricant, and then adding the mixture into an extruder together for extrusion molding, wherein the barrel temperature of the extruder is 180 ℃ plus 210 ℃, and the mold temperature is 170 ℃ plus 180 ℃, so that the extrusion molding is completed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113174006A (en) * | 2021-03-11 | 2021-07-27 | 常州都铂高分子有限公司 | Method for preventing gelation and large particle generation of resin |
| CN115850986A (en) * | 2022-12-19 | 2023-03-28 | 济宁金筑工贸有限公司 | Simulation fence support frame and composite material thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787167A (en) * | 2010-02-26 | 2010-07-28 | 华南师范大学 | High-performance antibiosis wood plastic composite material and preparation method thereof |
| CN102492304A (en) * | 2011-12-02 | 2012-06-13 | 江苏力达塑料托盘制造有限公司 | Preparation method of plant fiber base cross-linking wood plastic composite material |
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- 2019-09-29 CN CN201910932360.8A patent/CN110628233A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787167A (en) * | 2010-02-26 | 2010-07-28 | 华南师范大学 | High-performance antibiosis wood plastic composite material and preparation method thereof |
| CN102492304A (en) * | 2011-12-02 | 2012-06-13 | 江苏力达塑料托盘制造有限公司 | Preparation method of plant fiber base cross-linking wood plastic composite material |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113174006A (en) * | 2021-03-11 | 2021-07-27 | 常州都铂高分子有限公司 | Method for preventing gelation and large particle generation of resin |
| CN115850986A (en) * | 2022-12-19 | 2023-03-28 | 济宁金筑工贸有限公司 | Simulation fence support frame and composite material thereof |
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Application publication date: 20191231 |