CN109208360B - Wood composite fiber and preparation method thereof - Google Patents
Wood composite fiber and preparation method thereof Download PDFInfo
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- CN109208360B CN109208360B CN201811072524.6A CN201811072524A CN109208360B CN 109208360 B CN109208360 B CN 109208360B CN 201811072524 A CN201811072524 A CN 201811072524A CN 109208360 B CN109208360 B CN 109208360B
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- 239000000835 fiber Substances 0.000 title claims abstract description 104
- 239000002023 wood Substances 0.000 title claims abstract description 95
- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 34
- 229920000742 Cotton Polymers 0.000 claims abstract description 33
- 239000010893 paper waste Substances 0.000 claims abstract description 28
- 241000209046 Pennisetum Species 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000004806 packaging method and process Methods 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims description 27
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 238000007873 sieving Methods 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 14
- 244000062720 Pennisetum compressum Species 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000000123 paper Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 12
- 235000011613 Pinus brutia Nutrition 0.000 claims description 10
- 229920002488 Hemicellulose Polymers 0.000 claims description 9
- 235000011334 Pinus elliottii Nutrition 0.000 claims description 9
- 241000142776 Pinus elliottii Species 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 241000218641 Pinaceae Species 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000035484 reaction time Effects 0.000 claims description 8
- 238000002791 soaking Methods 0.000 claims description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 7
- 239000011707 mineral Substances 0.000 claims description 7
- 239000011261 inert gas Substances 0.000 claims description 5
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 4
- 229920001131 Pulp (paper) Polymers 0.000 claims description 4
- 239000012634 fragment Substances 0.000 claims description 4
- 238000002372 labelling Methods 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- 239000000600 sorbitol Substances 0.000 claims description 4
- 239000010902 straw Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 2
- 229920002522 Wood fibre Polymers 0.000 abstract description 9
- 239000002025 wood fiber Substances 0.000 abstract description 6
- 239000003921 oil Substances 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- 238000001291 vacuum drying Methods 0.000 description 4
- 241000218631 Coniferophyta Species 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000000643 oven drying Methods 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000010298 pulverizing process Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 241000544657 Larix gmelinii Species 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 2
- 241000018646 Pinus brutia Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000218645 Cedrus Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000007603 infrared drying Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- 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
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
- D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
-
- 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
-
- 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
- D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
-
- 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
- D21B1/06—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
- D21B1/08—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods the raw material being waste paper; the raw material being rags
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Paper (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a wood composite fiber and a preparation method thereof. The wood composite fiber is prepared from five original components in percentage by weight: 40-50% of pennisetum fiber, 20-30% of cotton stalk fiber, 10-20% of office waste paper fiber, 5-10% of needle-leaved tree liquefied wood and 4-5% of nano silicon dioxide dispersion liquid. The preparation method comprises six steps of preparation of pennisetum fiber, preparation of cotton stalk fiber, preparation of office waste paper fiber, preparation of needle-leaved tree liquefied wood, preparation of wood composite fiber and packaging. The wood composite fiber prepared by the invention has the advantages of less ash content, good heat resistance, high oil absorption rate, environment-friendly process and low cost, is an ideal road wood fiber material, and can also be used for preparing wood high-strength plates.
Description
Technical Field
The invention belongs to the field of new materials, and particularly relates to a wood composite fiber and a preparation method thereof.
Background
From the climate change frame convention of the environmental and development meeting of the united nations at about Hot Neolu 1 in Brazil in 1992 to the climate change frame convention of the world meeting at 21 st in Paris in France in 2015 through the Paris convention, arrangements are made for the global action of dealing with climate change after 2020, and then to the Paris convention approved by the United states in Hangzhou G20 Peak meeting in 2016, endless thinking and jack burden are left for resource, environment and material science and technology workers while the ' world economy of innovation, vitality, linkage and accommodation ' is constructed '. On one hand, the human beings have reached a wild step of developing and predating forest, petroleum and mineral resources; on the other hand, environmental pollution, climate deterioration and secondary disasters caused by disorder cutting and disorder cutting of forests and disorder digging of petroleum and mineral reserves can cause people to be frightened and completely eaten. People are then beginning to consider how to reduce the dependence on forests, petroleum and mineral resources. As a biomass material scientist, the method actively explores high-value clean utilization ways of herbaceous plants such as pennisetum and the like, crop straws such as cotton stalks and the like, office waste paper and other cheap carbon sink resources, prepares a novel wood composite fiber to enrich wood fiber materials for roads, initiates a new industry, and is responsible for side credit.
Through patent retrieval, the following closer patent technical schemes are inquired.
A process for preparing wood fibre used for road includes such steps as choosing waste newsprint as raw material, purifying, removing impurities, immersing, beating, mixing with modified superfine kaolin powder at ordinary temp and ordinary pressure, dewatering, drying, breaking to become loose wood fibre, mixing with prepared asphalt solution under ordinary temp, ordinary pressure and stirring, volatilizing solvent oil at 70-100 deg.C, cooling, granulating, extruding while shaping, cooling to obtain granular wood fibre product, and features high performance, can effectively prevent the phenomena of asphalt segregation and leakage in the processes of mixing, storing, transporting and paving, and lead the asphalt mixture to show better performance.
A wood cellulose material for road of patent II and Chinese patent application No. CN 200710022976.9 is prepared from un-deinked waste newspaper as raw material, mixed filler, surfactant, water-proofing agent and retention aid through dry and wet paper making, adding antistatic agent to make surface resistivity of 20.5 × 109 omega, fluffing paperboard to make specific surface area of 3-5m2/g, screening to remove dregs, mixing purified pulp with mixed filler, stirring, flushing to form paper web, pressing, drying in drying cylinder and infrared drying.
In the above patents, the raw materials are single, and the preparation process is not friendly to the environment!
None of the above-disclosed patent solutions disclose the present invention, and those skilled in the art can derive the technical teaching of the present invention from the combination of the above-disclosed patent solutions.
Disclosure of Invention
The invention aims to provide the wood composite fiber which can be compared favorably with the existing wood material (particularly the wood material for roads) in the market, and the wood composite fiber prepared by the scheme has the advantages of low ash content, good heat resistance, high oil absorption rate, environment-friendly process and low cost, and is an ideal wood fiber material for roads.
The invention also discloses a preparation method of the wood composite fiber.
In order to realize the purpose, the invention adopts the technical scheme that: the wood composite fiber is characterized by being prepared from five components in percentage by weight: 40-50% of pennisetum fiber, 20-30% of cotton stalk fiber, 10-20% of office waste paper fiber, 5-10% of needle-leaved tree liquefied wood and 4-5% of nano silicon dioxide dispersion liquid.
Preferably, the office waste paper is waste paper of wood pulp paper and straw pulp paper type copy paper.
Preferably, the coniferous tree is slash pine and/or gray cedar of Pinaceae.
Preferably, the needle-leaved tree liquefied wood is obtained by taking a plurality of wood chips of slash pine or gray fir of Pinaceae, drying in vacuum, crushing, sieving, mixing with a wood liquefying agent, and performing microwave liquefaction.
Preferably, the nano silicon dioxide dispersion liquid is transparent liquid, the pH value is 6-9, the content of the nano silicon dioxide is 20% -30%, and the particle size of the nano silicon dioxide is 10-20 nm.
The preparation method of the wood composite fiber comprises the following steps:
step 1: the preparation of the Chinese pennisetum fiber comprises the steps of collecting a plurality of Chinese pennisetum in open fields, drying in the sun, removing impurities, chopping, soaking in 5-15% NaOH solution for 10-20 h at room temperature, rinsing and drying to reduce the hemicellulose content of the Chinese pennisetum crushed aggregates by 60-70%; then crushing and sieving to obtain pennisetum fiber with the particle size less than 6mm for later use;
step 2: the preparation of the cotton stalk fiber comprises the steps of purchasing a plurality of cotton stalks from cotton farmers, drying in the sun, removing impurities, chopping, soaking in 5-15% NaOH solution for 10-20 h at room temperature, rinsing and drying to reduce the hemicellulose content of the pennisetum crushed aggregates by 60-70%; then crushing and sieving to obtain cotton stalk fiber with the grain size less than 6mm for later use;
and step 3: preparing office waste paper fiber, namely taking a plurality of office waste paper, removing nails, chopping, and then crushing at high speed to obtain flocculent fiber for later use;
and 4, step 4: preparing liquefied wood of coniferous trees, namely, taking a plurality of sawdust of slash pine or gray fir of Pinaceae, drying in vacuum, crushing and sieving to obtain coniferous wood powder with the particle size of 0.15-0.25 mm; then, needle leaf wood powder and a wood liquefying agent are mixed and then subjected to microwave liquefaction to obtain needle leaf liquefied wood for later use;
and 5: firstly, mixing needle-leaved tree liquefied wood obtained in the step 4 with nano-silica dispersion liquid according to a weight ratio to obtain uniform mixed liquid, then adding pennisetum fiber, cotton stalk fiber and office waste paper fiber obtained in the step 1-3 into the uniform mixed liquid according to a weight ratio to be stirred strongly, and then preparing the wood composite fiber through drying and dispersion treatment, wherein the original components of the wood composite fiber comprise 40-50% of pennisetum fiber, 20-30% of cotton stalk fiber, 10-20% of office waste paper fiber, 5-10% of needle-leaved tree liquefied wood and 4-5% of nano-silica dispersion liquid;
step 6: and (3) packaging, namely firstly confirming that the moisture content of the wood composite fiber obtained in the step (5) is less than 5% (otherwise, further drying is needed to enable the moisture content to reach the standard), and then carrying out damp-proof packaging and labeling.
Preferably, the wood liquefying agent in the step 5 is prepared by taking mineral water bottle fragments as a main material and sorbitol as an auxiliary material and performing thermal reaction under the protection of inert gas; the molar ratio of the main material to the auxiliary material is 1: 2-1: 4, the reaction temperature is 180-250 ℃, and the reaction time is 2-5 min.
Preferably, the microwave liquefaction process conditions in the step 4 are as follows: the solid-liquid mass ratio is 1: 3-1: 5, the liquefaction temperature is 150-160 ℃, and the reaction time is 5-15 min.
The invention has the beneficial effects that:
1. the invention takes the pennisetum alopecuroides, the cotton stalks and the needle-leaved tree wood chips as the base materials, comprehensively applies the interdisciplinary material forming theory of the woodlogy, the composite material science, the material processing engineering and the like, and innovates the preparation method of the wood composite fiber.
2. The invention provides a solution with high quality and low price for the wood fiber material for the road, the wood composite fiber prepared by the scheme has the advantages of little ash content, good heat resistance, high oil absorption rate, environment-friendly process and low cost, and is an ideal wood fiber material for the road; the wood fiber material can also be used for preparing wood high-strength plates.
3. The wood liquefier and the coniferous tree have the effects that: compared with broad-leaved wood, the needle-leaved wood has simple structure, and the components of cellulose, hemicellulose, lignin and the like are easier to be degraded into liquid micromolecules under the action of wood liquefier and the like, so that the nano silicon dioxide dispersion liquid is more favorably mixed and dispersed to obtain uniform mixed liquid.
4. The inert gas (such as nitrogen and argon) is introduced to isolate air and prevent oxidation of the material.
Detailed Description
The present invention is described in detail below for the purpose of better understanding technical solutions of the present invention by those skilled in the art, and the description of the present invention is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
Example 1:
the wood composite fiber is prepared from five components in percentage by weight: 40% of pennisetum fiber, 30% of cotton stalk fiber, 20% of waste paper fiber of straw pulp paper copy paper, 5% of slash pine liquefied wood and 5% of nano silicon dioxide dispersion liquid.
The slash pine liquefaction wood is obtained by vacuum drying a plurality of slash pine sawdust, crushing, sieving, mixing with a wood liquefying agent, and performing microwave liquefaction.
The nano silicon dioxide dispersion liquid is transparent liquid, the pH value is 6.1, the content of the nano silicon dioxide is 20%, and the particle size of the nano silicon dioxide is 10.
The preparation method of the wood composite fiber comprises the following steps:
step 1: the preparation method of the Chinese pennisetum fiber comprises collecting a plurality of Chinese pennisetum in open field, sun drying, removing impurities, chopping, soaking in 5% NaOH solution at room temperature for 10 hr, rinsing, and oven drying to reduce hemicellulose content of Chinese pennisetum crushed material by 60%; then crushing and sieving to obtain pennisetum fiber with the particle size less than 6mm for later use;
step 2: the preparation of the cotton stalk fiber comprises purchasing a plurality of cotton stalks from cotton growers, sun-drying, removing impurities, chopping, soaking in 5% NaOH solution at room temperature for 10h, rinsing, and oven-drying to reduce the hemicellulose content of the pennisetum crushed aggregates by 60%; then crushing and sieving to obtain cotton stalk fiber with the grain size less than 6mm for later use;
and step 3: preparing office waste paper fiber, namely taking a plurality of office waste paper, removing nails, chopping, and then crushing at high speed to obtain flocculent fiber for later use;
and 4, step 4: a liquefied wood of coniferous tree is prepared by collecting sawdust of slash pine or gray fir of Pinaceae, vacuum drying, pulverizing, and sieving to obtain coniferous wood powder with particle size of 0.15 mm; then mixing the needle leaf wood powder with a wood liquefying agent and then carrying out microwave liquefaction, wherein the microwave liquefaction process conditions are as follows: the solid-liquid mass ratio is 1:3, the liquefaction temperature is 150 ℃, and the reaction time is 15 min; obtaining needle leaf liquefied wood for later use;
and 5: firstly, mixing needle-leaved tree liquefied wood obtained in the step 4 with nano-silica dispersion liquid according to a weight ratio to obtain uniform mixed liquid, then adding pennisetum fiber, cotton stalk fiber and office waste paper fiber obtained in the steps 1-3 into the uniform mixed liquid according to a weight ratio to be stirred strongly, and then drying and dispersing to prepare wood composite fiber, wherein the original components of the wood composite fiber comprise 40% of pennisetum fiber, 20% of cotton stalk fiber, 10% of office waste paper fiber, 5% of needle-leaved tree liquefied wood and 4% of nano-silica dispersion liquid;
step 6: and (3) packaging, namely firstly confirming that the moisture content of the wood composite fiber obtained in the step (5) is less than 5% (otherwise, further drying is needed to enable the moisture content to reach the standard), and then carrying out damp-proof packaging and labeling.
Wherein the wood liquefying agent in the step 5 is prepared by taking mineral water bottle fragments as a main material and sorbitol as an auxiliary material and carrying out thermal reaction under the protection of inert gas (nitrogen or argon); the molar ratio of the main material to the auxiliary material is 1:2, the reaction temperature is 250 ℃, and the reaction time is 2 min.
Example 2
The wood composite fiber is prepared from five components in percentage by weight: 50% of pennisetum fiber, 20% of cotton stalk fiber, 16% of waste paper fiber of wood pulp paper copy paper, 10% of Huquoia liquefied wood and 4% of nano silicon dioxide dispersion liquid.
Preferably, the grey fir liquefied wood is needle-leaved liquefied wood obtained by taking a plurality of grey fir sawdust, drying in vacuum, crushing, sieving, mixing with a wood liquefying agent and then performing microwave liquefaction.
Preferably, the nano-silica dispersion is a transparent liquid, the pH value is 9, the nano-silica content is 30%, and the particle size of the nano-silica is 20 nm.
The preparation method of the wood composite fiber comprises the following steps:
step 1: the preparation method of the Chinese pennisetum fiber comprises collecting a plurality of Chinese pennisetum in open field, sun drying, removing impurities, chopping, soaking in 15% NaOH solution at room temperature for 20h, rinsing, and oven drying to reduce hemicellulose content of Chinese pennisetum crushed material by 70%; then crushing and sieving to obtain pennisetum fiber with the particle size less than 6mm for later use;
step 2: preparing cotton stalk fiber, purchasing a plurality of cotton stalks from cotton growers, drying in the sun, removing impurities, chopping, soaking in 15% NaOH solution at room temperature for 20h, rinsing, and drying to reduce the hemicellulose content of the pennisetum crushed aggregates by 70%; then crushing and sieving to obtain cotton stalk fiber with the grain size less than 6mm for later use;
and step 3: preparing office waste paper fiber, namely taking a plurality of office waste paper, removing nails, chopping, and then crushing at high speed to obtain flocculent fiber for later use;
and 4, step 4: a liquefied wood of coniferous tree is prepared by collecting sawdust of slash pine or gray fir of Pinaceae, vacuum drying, pulverizing, and sieving to obtain coniferous wood powder with particle size of 0.25 mm; then mixing the needle leaf wood powder with a wood liquefying agent and then carrying out microwave liquefaction, wherein the microwave liquefaction process conditions are as follows: the solid-liquid mass ratio is 1:5, the liquefaction temperature is 160 ℃, and the reaction time is 5 min; obtaining needle leaf liquefied wood for later use;
and 5: firstly, mixing needle-leaved tree liquefied wood obtained in the step 4 with nano-silica dispersion liquid according to a weight ratio to obtain uniform mixed liquid, then adding pennisetum fiber, cotton stalk fiber and office waste paper fiber obtained in the steps 1-3 into the uniform mixed liquid according to a weight ratio to be stirred strongly, then drying and dispersing to prepare wood composite fiber, and enabling the original components of the wood composite fiber to be 50% of pennisetum fiber, 20% of cotton stalk fiber, 16% of office waste paper fiber, 10% of needle-leaved tree liquefied wood and 4% of nano-silica dispersion liquid in percentage by weight;
step 6: and (3) packaging, namely firstly confirming that the moisture content of the wood composite fiber obtained in the step (5) is less than 5% (otherwise, further drying is needed to enable the moisture content to reach the standard), and then carrying out damp-proof packaging and labeling.
Preferably, the wood liquefying agent in the step 5 is prepared by taking mineral water bottle fragments as a main material and sorbitol as an auxiliary material and performing thermal reaction under the protection of inert gas; the molar ratio of the main material to the auxiliary material is 1:4, the reaction temperature is 180 ℃, and the reaction time is 5 min.
Example 3
The difference from the embodiment 1 is that the weight percentage of each component is as follows: 45% of pennisetum fiber, 20% of cotton stalk fiber, 20% of wood pulp paper copy waste paper fiber, 10% of needle-leaved tree liquefied wood and 5% of nano-silica dispersion liquid.
Wherein the conifer is Larix gmelinii or Huisha pine of Pinaceae, and the conifer liquefied wood is prepared by collecting sawdust of Larix gmelinii or Huisha pine of Pinaceae, vacuum drying, pulverizing, sieving, mixing with wood liquefying agent, and performing microwave liquefaction to obtain conifer liquefied wood.
The preparation method thereof is referred to in example 1-2.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (3)
1. The wood composite fiber is characterized by being prepared from five components in percentage by weight: 40-50% of pennisetum fiber, 20-30% of cotton stalk fiber, 10-20% of office waste paper fiber, 5-10% of needle-leaved tree liquefied wood and 4-5% of nano silicon dioxide dispersion liquid;
the preparation method of the wood composite fiber comprises the following steps:
step 1: the preparation of the Chinese pennisetum fiber comprises the steps of collecting a plurality of Chinese pennisetum in open fields, drying in the sun, removing impurities, chopping, soaking in 5-15% NaOH solution for 10-20 h at room temperature, rinsing and drying to reduce the hemicellulose content of the Chinese pennisetum crushed aggregates by 60-70%; then crushing and sieving to obtain pennisetum fiber with the particle size less than 6mm for later use;
step 2: the preparation of the cotton stalk fiber comprises the steps of purchasing a plurality of cotton stalks from cotton farmers, drying in the sun, removing impurities, chopping, soaking in 5-15% NaOH solution for 10-20 h at room temperature, rinsing and drying to reduce the hemicellulose content of the pennisetum crushed aggregates by 60-70%; then crushing and sieving to obtain cotton stalk fiber with the grain size less than 6mm for later use;
and step 3: preparing office waste paper fiber, namely taking a plurality of office waste paper, removing nails, chopping, and then crushing at high speed to obtain flocculent fiber for later use;
and 4, step 4: preparing liquefied wood of coniferous trees, namely, taking a plurality of sawdust of slash pine or gray fir of Pinaceae, drying in vacuum, crushing and sieving to obtain coniferous wood powder with the particle size of 0.15-0.25 mm; then, needle leaf wood powder and a wood liquefying agent are mixed and then subjected to microwave liquefaction to obtain needle leaf liquefied wood for later use;
and 5: firstly, mixing needle-leaved tree liquefied wood obtained in the step 4 with nano-silica dispersion liquid according to a weight ratio to obtain uniform mixed liquid, then adding pennisetum fiber, cotton stalk fiber and office waste paper fiber obtained in the step 1-3 into the uniform mixed liquid according to a weight ratio to be stirred strongly, and then preparing the wood composite fiber through drying and dispersion treatment, wherein the original components of the wood composite fiber comprise 40-50% of pennisetum fiber, 20-30% of cotton stalk fiber, 10-20% of office waste paper fiber, 5-10% of needle-leaved tree liquefied wood and 4-5% of nano-silica dispersion liquid;
step 6: packaging, namely firstly confirming that the moisture content of the wood composite fiber obtained in the step 5 is less than 5%, and then carrying out damp-proof packaging and labeling;
the wood liquefying agent in the step 5 is prepared by taking mineral water bottle fragments as a main material and sorbitol as an auxiliary material and carrying out thermal reaction under the protection of inert gas; the molar ratio of the main material to the auxiliary material is 1: 2-1: 4, the reaction temperature is 180-250 ℃, and the reaction time is 2-5 min;
the microwave liquefaction process conditions in the step 4 are as follows: the solid-liquid mass ratio is 1: 3-1: 5, the liquefaction temperature is 150-160 ℃, and the reaction time is 5-15 min.
2. The wood composite fiber according to claim 1, wherein the office waste paper is waste paper of wood pulp paper and straw pulp paper type copy paper.
3. The wood composite fiber according to claim 1, wherein the nano silica dispersion is a transparent liquid, the pH value is 6-9, the nano silica content is 20-30%, and the particle size of the nano silica is 10-20 nm.
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| CN102491683A (en) * | 2011-11-14 | 2012-06-13 | 长安大学 | Method for preparing mineral cotton fiber and asphalt mixture for roads |
| CN107746208A (en) * | 2017-10-24 | 2018-03-02 | 中南林业科技大学 | A kind of road herbaceous plant Fiber Asphalt Mixture and preparation method thereof |
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| US3016582A (en) * | 1957-02-14 | 1962-01-16 | Falls Paper & Power Company | Batt or mat forming apparatus |
| CN1405372A (en) * | 2002-08-20 | 2003-03-26 | 东北大学 | Method for preparing lignocellulose for road |
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