CN108999007B - Component-deficient plant long fiber and preparation method and application thereof - Google Patents
Component-deficient plant long fiber and preparation method and application thereof Download PDFInfo
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- CN108999007B CN108999007B CN201810868061.8A CN201810868061A CN108999007B CN 108999007 B CN108999007 B CN 108999007B CN 201810868061 A CN201810868061 A CN 201810868061A CN 108999007 B CN108999007 B CN 108999007B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
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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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Abstract
The invention discloses a component-missing plant long fiber and a preparation method thereof, wherein a wood fiber raw material is crushed, washed with water, and simultaneously conveyed into a double-helix extrusion thread rolling machine with steam, and the material is collected for heat preservation reaction; after the heat preservation reaction is finished, washing the obtained product for the second time to obtain the component-deficient plant long fiber. The method can effectively produce the component-missing plant long fibers in batch, and the enhanced wood-plastic composite material is prepared from the plant long fibers, so that the environmental pollution in the production process is reduced, the potential safety hazard in production is reduced, the mechanical property and the weather resistance of the wood-plastic composite material are obviously improved, and the method has positive significance for the integrated wood-plastic industry.
Description
Technical Field
The invention belongs to the field of materials, and particularly relates to a component-deficient long plant fiber, and a preparation method and application thereof.
Background
A wood-plastic composite material is prepared from plant fibres including agricultural straw, agricultural and forestry wastes, thermoplastic plastics, modifier with special function and other assistants through plastic shaping. The wood-plastic composite material integrates a plurality of advantages of plant fiber and high polymer material, can replace wood in large quantity, can effectively relieve the contradiction of forest resource shortage and wood supply shortage in China, solves the problem of recycling waste resources in the plastic and agriculture and forestry industries, and is a low-carbon, green, recyclable and renewable material with great development prospect. The main characteristics are as follows: the method has the advantages of raw material recycling, product plasticity, environmental protection in use, cost economy and recycling and biochemical treatment.
From the mainstream processing technology at present, plant fibers need to be pulverized in the wood-plastic production process, so that serious dust pollution is brought to a production workshop, and great potential safety, environmental protection and sanitation hazards are brought. Compared with plant fiber powder, the plant long fiber can greatly improve various performances of the wood-plastic composite material and reduce environmental hazards, but the long fiber cannot be widely used due to large batch homogenization preparation difficulty and instability of the long fiber in the hot processing process.
The invention starts from uniform mass preparation of the plant long fiber, selectively separates polysaccharide, hemicellulose and partial lignin in the plant fiber by condition control, prepares the component-deficient plant long fiber, improves the waterproof, mildew-proof and weather-proof performances of the wood-plastic composite material, and improves the product value of the wood-plastic composite material.
Disclosure of Invention
The invention aims to solve the technical problem of providing a component-deficient long plant fiber to solve the problems of overhigh cost, serious environmental hazard, low production efficiency and the like in the prior art.
The invention also aims to solve the technical problem of providing a preparation method and application of the component-deficient plant long fiber.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a preparation method of component-deleted plant long fiber comprises the following steps:
crushing and washing the wood fiber raw material, conveying the wood fiber raw material and steam to a double-screw extrusion thread rolling machine simultaneously, and collecting the materials for heat preservation reaction; after the heat preservation reaction is finished, washing the obtained product for the second time to obtain the component-deficient plant long fiber.
Wherein the wood fiber raw material is agricultural straw and/or agricultural and forestry processing waste; the agricultural straws comprise wheat straws, rice straws, corn straws, potato straws, rape straws, cotton straws, grapevines, hemp plants and sorghum straws, and the agricultural and forestry processing wastes comprise bagasse, waste bamboo chips (dregs), waste wood chips (dregs) and coconut shells.
Wherein the smashing refers to smashing the wood fiber raw material to the length of 5-30 cm.
Wherein, the washing refers to washing with hot water to remove dust and wax.
Wherein the steam is replaced by acid water solution, alkali water solution or alkaline hydrogen peroxide solution.
Wherein the aqueous solution of the acid is the aqueous solution of the non-volatile inorganic acid; wherein, in the acid water solution, the mass percentage concentration of the acid is 0.2-1.0 wt%.
Wherein the non-volatile inorganic acid comprises sulfuric acid and phosphoric acid.
Wherein the aqueous solution of the alkali is any one or the combination of a plurality of aqueous solutions of sodium hydroxide, potassium hydroxide and sodium carbonate; wherein, in the alkali water solution, the mass percentage concentration of alkali is 2.0-8.0 wt%.
Wherein the alkaline hydrogen peroxide solution is a mixed solution of an alkaline aqueous solution and a hydrogen peroxide aqueous solution, and the alkaline aqueous solution is a sodium hydroxide aqueous solution or a potassium hydroxide aqueous solution; wherein, in the alkaline hydrogen peroxide solution, the mass percentage concentration of the hydrogen peroxide is 0.5-3.0 wt%, and the pH value is 12.0-13.5.
Among them, it is preferable that the steam is replaced with an alkaline aqueous hydrogen peroxide solution.
Wherein, the conditions of the heat preservation reaction are as follows: the temperature is 70-100 ℃, and the time is 0.5-2 h.
Wherein, the secondary water washing refers to washing out hemicellulose, polysaccharide and other impurities dissociated by high-temperature shearing action in the screw rod by water, and simultaneously washing out ash again.
The component-deleted long plant fiber prepared by any one of the above methods is also within the protection scope of the present invention.
The application of the plant long fiber with the deletion component in the preparation of wood-plastic materials is also within the protection scope of the invention.
The application method comprises the following steps:
and mixing and molding the component-missing plant long fiber, the plastic and the auxiliary materials to prepare the wood-plastic material.
Wherein the obtained wood-plastic composite is an enhanced wood-plastic composite
The mixing refers to uniformly mixing the component deletion type plant long fiber, the plastic and the auxiliary materials, and then banburying in a banbury mixer to obtain a uniformly mixed plasticized material.
Wherein the rotating speed in the internal mixer is 20-100 rpm, the temperature is 160-220 ℃, and the internal mixing time is 5-15 minutes.
The molding method is any one or combination of several of single-screw extrusion, double-screw extrusion, injection molding, mould pressing and rotational molding.
Wherein, the component-deficient plant long fiber is dehydrated and dried before being mixed with the plastic and the auxiliary materials; wherein the dehydration refers to squeezing and dehydrating the component-deficient long plant fiber until the water content is 30-40%; the drying refers to drying the dehydrated component-deficient long plant fiber until the water content is reduced to 2-10%.
Wherein, the component-missing plant long fiber, the plastic and the auxiliary materials are uniformly mixed by a mixer before banburying.
Wherein the thermoplastic plastic is any one or combination of more of polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylonitrile-butadiene-styrene copolymer and polyamide.
Wherein the mass parts of the component-deficient plant long fiber and the thermoplastic plastic are as follows:
20-100 parts of component-deficient long plant fiber;
20-100 parts of thermoplastic plastics;
the formula of the wood-plastic material can comprise an impact modifier, a coupling agent, a plasticizer, a foaming agent and a heat stabilizer besides the component-deficient plant long fiber, the thermoplastic, the compatilizer and the inorganic mineral powder.
Wherein the impact modifier is any one or combination of more of predetermined elastomer impact modifiers (MBS, ACR, MABS and the like), non-predetermined elastomer impact modifiers (CPE, EVA and the like), transition impact modifiers (SBS and the like) and rubber impact modifiers (nitrile rubber and the like).
Wherein the plasticizer is any one or combination of several of dioctyl phthalate, dioctyl terephthalate, phosphate, chlorinated paraffin, epoxide (epoxy soybean oil and the like) and petroleum ester.
Wherein, the coupling agent is any one or combination of more of silane coupling agent, titanate coupling agent and isocyanate.
Wherein the heat stabilizer is any one or a combination of more of tribasic lead sulfate, dibasic lead sulfite, zinc stearate, cadmium stearate, lead stearate, calcium stearate, environment-friendly calcium and zinc, a composite organic tin stabilizer and a composite lead salt stabilizer.
Wherein the formula comprises the following components in parts by weight:
has the advantages that:
compared with the prior art, the invention has the following advantages:
the method can effectively produce the component-missing plant long fibers in batch, and the enhanced wood-plastic composite material is prepared from the plant long fibers, so that the environmental pollution in the production process is reduced, the potential safety hazard in production is reduced, the mechanical property and the weather resistance of the wood-plastic composite material are obviously improved, and the method has positive significance for the integrated wood-plastic industry.
Detailed Description
Comparative example 1:
raw materials: 100 parts of polyethylene, 60 parts of 100-mesh wheat straw powder, 20 parts of talcum powder, 1 part of vinyl bis stearamide and 3 parts of stearic acid.
The preparation process comprises the following steps:
(1) the raw materials with the formula ratio are added into a mixer to be fully mixed, the mixture is firstly mixed at the rotating speed of 800rpm until the temperature is 120 ℃, and then the mixture is mixed with cold water at the rotating speed of 250rpm until the temperature is below 60 ℃.
(2) And (2) adding the mixture obtained in the step (1) into a conical double-screw extruder, wherein the extrusion temperature is 180 ℃, and the screw rotating speed is 45 rpm.
Comparative example 2
The preparation process comprises the following steps:
(1) crushing: crushing the wheat straws to obtain the wheat straws with the length of 5-10 cm;
(2) washing with water: washing the wheat straws obtained in the step (1) with hot water for dedusting, and removing wax;
(3) preparing long fibers by double-helix dynamic extrusion: and (3) conveying the wheat straws cleaned in the step (2) to a double-screw extruding and kneading machine, introducing steam into the extruder, collecting materials, and carrying out heat preservation reaction.
(4) And (3) secondary water washing: and (4) cleaning the material obtained in the step (3), and eluting the components dissociated in the step (3), such as hemicellulose, polysaccharide and the like.
(5) And (3) dehydrating: extruding and dehydrating the material subjected to secondary water washing to reduce the water content to 30%;
(6) drying: drying the dehydrated materials to ensure that the plant fibers are homogenized and fluffed, and the water content is reduced to 3 wt%, wherein the cellulose proportion is 47%, the hemicellulose proportion is 10%, and the lignin proportion is 29%.
(7) Powdering: pulverizing the plant long fiber into 100 meshes
(8) Preparing the wood-plastic composite material:
taking 100 parts of polyethylene, 60 parts of component-deficient long wheat straw fiber powder prepared in the process (6), 20 parts of talcum powder and 3 parts of stearic acid. Mixing: placing the component-deficient plant long fibers obtained in the step (6), the thermoplastic plastics, the compatilizer and the inorganic mineral powder into a mixer according to the formula proportion and uniformly mixing; and adding the uniformly mixed materials into an internal mixer for internal mixing for 10 minutes at the rotating speed of 30rpm and the temperature of 180 ℃ to obtain a plasticized material. Molding: and (3) adding the mixture obtained in the step (8) into a single-screw extruder, wherein the extrusion temperature is 185 ℃, and the screw rotating speed is 60 rpm.
Example 1
The preparation process comprises the following steps:
(1) crushing: crushing the wheat straws to obtain the wheat straws with the length of 5-10 cm;
(2) washing with water: washing the wheat straws obtained in the step (1) with hot water for dedusting, and removing wax;
(3) preparing long fibers by double-helix dynamic extrusion: and (3) conveying the wheat straws cleaned in the step (2) to a double-screw extruding and kneading machine, introducing steam into the extruder, collecting materials, and carrying out heat preservation reaction.
(4) And (3) secondary water washing: and (4) cleaning the material obtained in the step (3), and eluting the components dissociated in the step (3), such as hemicellulose, polysaccharide and the like.
(5) And (3) dehydrating: extruding and dehydrating the material subjected to secondary water washing to reduce the water content to 30%;
(6) drying: drying the dehydrated materials to ensure that the plant fibers are homogenized and fluffed, and the water content is reduced to 3 wt%, wherein the cellulose proportion is 47%, the hemicellulose proportion is 10%, and the lignin proportion is 29%.
(7) Preparing the wood-plastic composite material:
taking 100 parts of polyethylene, 60 parts of component-deficient long wheat straw fiber prepared in the process (6), 20 parts of talcum powder and 3 parts of stearic acid. Mixing: placing the component-deficient plant long fibers obtained in the step (6), the thermoplastic plastics, the compatilizer and the inorganic mineral powder into a mixer according to the formula proportion and uniformly mixing; and adding the uniformly mixed materials into an internal mixer for internal mixing for 10 minutes at the rotating speed of 30rpm and the temperature of 180 ℃ to obtain a plasticized material. Molding: and (3) adding the mixture obtained in the step (8) into a single-screw extruder, wherein the extrusion temperature is 185 ℃, and the screw rotating speed is 60 rpm.
Example 2
The preparation process comprises the following steps:
(1) crushing: crushing the wheat straws to obtain the wheat straws with the length of 5-10 cm;
(2) washing with water: washing the wheat straws obtained in the step (1) with hot water for dedusting, and removing wax;
(3) preparing long fibers by double-helix dynamic extrusion: and (3) conveying the wheat straws cleaned in the step (2) to a double-screw extruding and kneading machine, introducing a dilute sulfuric acid solution (0.5% w/w) into the extruding machine, collecting the materials, and carrying out heat preservation reaction.
(4) And (3) secondary water washing: and (4) cleaning the material obtained in the step (3), and eluting the components dissociated in the step (3), such as hemicellulose, polysaccharide and the like.
(5) And (3) dehydrating: extruding and dehydrating the material subjected to secondary water washing to reduce the water content to 30%;
(6) drying: drying the dehydrated materials to ensure that the plant fibers are homogenized and fluffed, and the water content is reduced to 3 wt%, wherein the cellulose proportion is 55%, the hemicellulose proportion is 3%, and the lignin proportion is 33%.
(7) Preparing the wood-plastic composite material:
taking 100 parts of polyethylene, 60 parts of component-deficient long wheat straw fiber prepared in the process (6), 20 parts of talcum powder and 3 parts of stearic acid. Mixing: placing the component-deficient plant long fibers obtained in the step (6), the thermoplastic plastics, the compatilizer and the inorganic mineral powder into a mixer according to the formula proportion and uniformly mixing; and adding the uniformly mixed materials into an internal mixer for internal mixing for 10 minutes at the rotating speed of 30rpm and the temperature of 180 ℃ to obtain a plasticized material. Molding: and (3) adding the mixture obtained in the step (8) into a single-screw extruder, wherein the extrusion temperature is 185 ℃, and the screw rotating speed is 60 rpm.
Example 3
The preparation process comprises the following steps:
(1) crushing: crushing the wheat straws to obtain the wheat straws with the length of 5-10 cm;
(2) washing with water: washing the wheat straws obtained in the step (1) with hot water for dedusting, and removing wax;
(3) preparing long fibers by double-helix dynamic extrusion: and (3) conveying the wheat straws cleaned in the step (2) to a double-screw extruding and kneading machine, introducing a sodium hydroxide solution (2% w/w) into the extruding machine, collecting the materials, and carrying out heat preservation reaction.
(4) And (3) secondary water washing: and (4) cleaning the material obtained in the step (3), and eluting components such as lignin and a small amount of hemicellulose dissociated in the step (3).
(5) And (3) dehydrating: extruding and dehydrating the material subjected to secondary water washing to reduce the water content to 30%;
(6) drying: drying the dehydrated materials to ensure that the plant fibers are homogenized and fluffed, and the water content is reduced to 3 wt%, wherein the cellulose proportion is 50%, the hemicellulose proportion is 24%, and the lignin proportion is 12%.
(7) Preparing the wood-plastic composite material:
taking 100 parts of polyethylene, 60 parts of component-deficient long wheat straw fiber prepared in the process (6), 20 parts of talcum powder and 3 parts of stearic acid. Mixing: placing the component-deficient plant long fibers obtained in the step (6), the thermoplastic plastics, the compatilizer and the inorganic mineral powder into a mixer according to the formula proportion and uniformly mixing; and adding the uniformly mixed materials into an internal mixer for internal mixing for 10 minutes at the rotating speed of 30rpm and the temperature of 180 ℃ to obtain a plasticized material. Molding: and (3) adding the mixture obtained in the step (8) into a single-screw extruder, wherein the extrusion temperature is 185 ℃, and the screw rotating speed is 60 rpm.
Example 4
The preparation process comprises the following steps:
(1) crushing: crushing the wheat straws to obtain the wheat straws with the length of 5-10 cm;
(2) washing with water: washing the wheat straws obtained in the step (1) with hot water for dedusting, and removing wax;
(3) preparing long fibers by double-helix dynamic extrusion: and (3) conveying the wheat straws cleaned in the step (2) to a double-screw extrusion kneading machine, introducing alkaline hydrogen peroxide (pH 13, 1% w/w) into the extruder, collecting materials, and carrying out heat preservation reaction.
(4) And (3) secondary water washing: and (4) cleaning the material obtained in the step (3), and eluting the components dissociated in the step (3), such as hemicellulose, polysaccharide or lignin and the like.
(5) And (3) dehydrating: extruding and dehydrating the material subjected to secondary water washing to reduce the water content to 30%;
(6) drying: drying the dehydrated materials to ensure that the plant fibers are homogenized and fluffed, and the water content is reduced to 3 percent by weight, wherein the cellulose proportion is 74 percent, the hemicellulose proportion is 10 percent, and the lignin proportion is 3 percent.
(7) Preparing the wood-plastic composite material:
taking 100 parts of polyethylene, 60 parts of component-deficient long wheat straw fiber prepared in the process (6), 20 parts of talcum powder and 3 parts of stearic acid. Mixing: placing the component-deficient plant long fibers obtained in the step (6), the thermoplastic plastics, the compatilizer and the inorganic mineral powder into a mixer according to the formula proportion and uniformly mixing; and adding the uniformly mixed materials into an internal mixer for internal mixing for 10 minutes at the rotating speed of 30rpm and the temperature of 180 ℃ to obtain a plasticized material. Molding: and (3) adding the mixture obtained in the step (8) into a single-screw extruder, wherein the extrusion temperature is 185 ℃, and the screw rotating speed is 60 rpm.
Example 5
The preparation process comprises the following steps:
(1) crushing: crushing the wheat straws to obtain the wheat straws with the length of 5-10 cm;
(2) washing with water: washing the wheat straws obtained in the step (1) with hot water for dedusting, and removing wax;
(3) preparing long fibers by double-helix dynamic extrusion: and (3) conveying the wheat straws cleaned in the step (2) to a double-screw extrusion kneading machine, introducing alkaline hydrogen peroxide (pH 13, 1% w/w) into the extruder, collecting materials, and carrying out heat preservation reaction.
(4) And (3) secondary water washing: and (4) cleaning the material obtained in the step (3), and eluting the components dissociated in the step (3), such as hemicellulose, polysaccharide or lignin and the like.
(5) And (3) dehydrating: extruding and dehydrating the material subjected to secondary water washing to reduce the water content to 30%;
(6) drying: drying the dehydrated materials to ensure that the plant fibers are homogenized and fluffed, and the water content is reduced to 3 percent by weight, wherein the cellulose proportion is 74 percent, the hemicellulose proportion is 10 percent, and the lignin proportion is 3 percent.
(7) Preparing the wood-plastic composite material:
taking 100 parts of polyethylene, 60 parts of component-deficient long wheat straw fiber prepared in the process (6), 20 parts of talcum powder and 3 parts of stearic acid. Mixing: placing the component-deficient plant long fibers obtained in the step (6), the thermoplastic plastics, the compatilizer and the inorganic mineral powder into a mixer according to the formula proportion and uniformly mixing; and adding the uniformly mixed materials into an internal mixer for internal mixing for 10 minutes at the rotating speed of 30rpm and the temperature of 180 ℃ to obtain a plasticized material. Molding: and (4) adding the mixture obtained in the step (8) into a flat vulcanizing machine mold, wherein the mold pressing temperature is 180 ℃, and the mold pressing time is 10 min.
Example 6
The preparation process comprises the following steps:
(1) crushing: crushing the wheat straws to obtain the wheat straws with the length of 5-10 cm;
(2) washing with water: washing the wheat straws obtained in the step (1) with hot water for dedusting, and removing wax;
(3) preparing long fibers by double-helix dynamic extrusion: and (3) conveying the wheat straws cleaned in the step (2) to a double-screw extrusion kneading machine, introducing alkaline hydrogen peroxide (pH 13, 1% w/w) into the extruder, collecting materials, and carrying out heat preservation reaction.
(4) And (3) secondary water washing: and (4) cleaning the material obtained in the step (3), and eluting the components dissociated in the step (3), such as hemicellulose, polysaccharide or lignin and the like.
(5) And (3) dehydrating: extruding and dehydrating the material subjected to secondary water washing to reduce the water content to 30%;
(6) drying: drying the dehydrated materials to ensure that the plant fibers are homogenized and fluffed, and the water content is reduced to 3 percent by weight, wherein the cellulose proportion is 74 percent, the hemicellulose proportion is 10 percent, and the lignin proportion is 3 percent.
(7) Preparing the wood-plastic composite material:
taking 100 parts of polyethylene, 60 parts of component-deficient long wheat straw fiber prepared in the process (6), 20 parts of talcum powder and 3 parts of stearic acid. Mixing: placing the component-deficient plant long fibers obtained in the step (6), the thermoplastic plastics, the compatilizer and the inorganic mineral powder into a mixer according to the formula proportion and uniformly mixing; and adding the uniformly mixed materials into an internal mixer for internal mixing for 10 minutes at the rotating speed of 30rpm and the temperature of 180 ℃ to obtain a plasticized material. Molding: and (3) adding the mixture obtained in the step (8) into an injection molding machine, wherein the injection molding temperature is 190 ℃.
And polishing the surface of the composite material profile product. The performance of the reinforced wood-plastic composite material prepared from the component-deficient plant long fibers and a comparative product is detected according to GB/T24598-2009 Wood-Plastic floor and GB/T16422.3-2014, and the detection results are shown in tables 1 and 2.
The experimental result shows that compared with wood fiber powder, components which are not removed, hemicellulose is removed, lignin is removed, and the wood-plastic composite material prepared from the component-deficient plant long fibers is improved in various performances. The main reason may be that the plant fiber is treated by the chemical catalysis and the coordination of the double-screw extrusion thread rolling, and the polysaccharide, the hemicellulose and part of the lignin in the plant fiber are selectively separated. The removal of hemicellulose and lignin improves the physical properties, mechanical properties and dimensional stability of the wood-plastic material, and the physical properties, mechanical properties and dimensional stability of the wood-plastic material are all higher than index requirements in national standards, so that market demands can be met.
TABLE 1
TABLE 2
Claims (8)
1. The application of the component-deficient plant long fiber in preparing the wood-plastic material is characterized in that the component-deficient plant long fiber is prepared by the following method: crushing and washing the wood fiber raw material, conveying the crushed and washed wood fiber raw material and an acid aqueous solution to a double-screw extrusion thread rolling machine simultaneously, and collecting materials for heat preservation reaction; after the heat preservation reaction is finished, washing the obtained product for the second time to obtain the component-deficient plant long fiber;
wherein the smashing refers to smashing the wood fiber raw material to 5-30 cm in length;
wherein the aqueous solution of the acid is the aqueous solution of the non-volatile inorganic acid; wherein, in the acid water solution, the mass percentage concentration of the acid is 0.2-1.0 wt%.
2. The use according to claim 1, wherein the lignocellulosic feedstock is an agricultural or forestry process waste.
3. The use according to claim 1, wherein the incubation reaction conditions are: the temperature is 70-100 ℃, and the time is 0.5-2 h.
4. The use according to claim 1, wherein said use is: and mixing and molding the component-missing plant long fiber, the plastic and the auxiliary materials to prepare the wood-plastic material.
5. The use of claim 4, wherein the mixing is carried out by uniformly mixing the component-deficient long plant fiber, the plastic and the auxiliary materials and then banburying the mixture in an internal mixer to obtain a uniformly mixed plasticized material.
6. The use according to claim 4, wherein the forming method is any one or combination of single screw extrusion, twin screw extrusion, injection molding, compression molding and rotational molding.
7. The use according to claim 4, wherein the plastic is a thermoplastic, and the thermoplastic is any one or a combination of polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylonitrile-butadiene-styrene copolymer and polyamide.
8. The use of claim 7, wherein the component-deficient plant long fiber and thermoplastic plastic comprise the following components in parts by weight:
20-100 parts of component-deficient long plant fiber;
20-100 parts of thermoplastic plastics.
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| CN101644011B (en) * | 2008-08-06 | 2011-03-30 | 李朝旺 | Totally chlorine-free clean pulping method by separation and utilization of full-stalk kenaf component |
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| CN103992587B (en) * | 2014-04-30 | 2016-05-04 | 山东霞光实业有限公司 | A kind of Wood-plastic profiles formula and production technology thereof of utilizing lake region resource |
| CN104356663A (en) * | 2014-12-03 | 2015-02-18 | 松原光禾能源有限公司 | Preparation method of lignin thermoplastic material |
| CN104711881B (en) * | 2015-02-12 | 2017-01-25 | 新疆国力源投资有限公司 | Salix psammophila bleached chemi-mechanical pulp technology |
| CN104746370B (en) * | 2015-03-05 | 2016-10-19 | 新疆国力源环保科技有限公司 | The preparation technology of mulberry shoot bleached chemi-mechanical pulp |
| CN107602970A (en) * | 2017-08-09 | 2018-01-19 | 南京工业大学 | Application of the xylose residue in Wood-plastic material is prepared |
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2018
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