CN110509391A - A kind of preparation method of water-proof high-strength fiberboard - Google Patents
A kind of preparation method of water-proof high-strength fiberboard Download PDFInfo
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- CN110509391A CN110509391A CN201910761424.2A CN201910761424A CN110509391A CN 110509391 A CN110509391 A CN 110509391A CN 201910761424 A CN201910761424 A CN 201910761424A CN 110509391 A CN110509391 A CN 110509391A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
- B27L11/08—Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood fibres, e.g. produced by tearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/12—Moulding of mats from fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/20—Moulding or pressing characterised by using platen-presses
- B27N3/203—Moulding or pressing characterised by using platen-presses with heating or cooling means
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The present invention relates to a kind of preparation methods of water-proof high-strength fiberboard, belong to household technical field of material.The present invention is first using pine bark as raw material, steam explosion product will be obtained after its Steam explosion treatment, again by gas explosion product and laccase mixed enzymolysis, pretreatment of fiber material is obtained after gained enzymolysis product is dry, oxidation processes are carried out to pretreatment of fiber material followed by hydrogen peroxide, again by the reaction solution hybrid reaction of the fiber material and sodium metasilicate of oxidation processes and hydrochloric acid, modified fibre material is made, modified fibre material is then put into injection molding hot pressing after reacting in high-temperature high-pressure reaction kettle again, finally obtained water-proof high-strength fiberboard, fiberboard prepared by the present invention, waterproof performance is preferable, mechanical strength is higher, have broad application prospects.
Description
Technical field
The present invention relates to a kind of preparation methods of water-proof high-strength fiberboard, belong to household technical field of material.
Background technique
Fiberboard also known as density board, be using wood fibre or other plant cellulose fiber as raw material, apply phenolic resin or its
Wood-based plate made of the adhesive that he is applicable in, can apply adhesive and/or additive in manufacturing process, and fiberboard has material
Uniformly, the advantages that intensity difference is not small, easy to crack in length and breadth, it is widely used.But current fiberboard is there is also many shortcomings,
First is that intensity is relatively low, second is that being easy dilatancy after water suction.
Fiberboard is also known as density board, be using wood fibre or other plant cellulose fiber as raw material, apply Lauxite or its
Wood-based plate made of the adhesive that he is applicable in.Fiberboard has many advantages, such as that uniform in material, intensity difference is not small, easy to crack in length and breadth, uses
Way is extensively.Develop the effective way that Fibreboard Production is timber resources comprehensive utilization.But the moisture-proof water resistance of fiberboard compared with
Difference easily deforms bow warping after moisture absorption because generating expansive force difference, and fiberboard is in the production process, often plus
Enter cheap, colourless formaldehyde based resin binder, this binder can generate pernicious gas formaldehyde after use, seriously endanger people
Class and Environmental Health.
It is raw material production fiberboard with timber, has had the history of some time, at home and abroad generally used wet
The hardboard and softboard of method production.But wet production fiberboard will discharge a large amount of waste water, advise since enterprise produces
Mould is limited, and cost for wastewater treatment is excessively high, in the case where environmental protection requirement is increasingly tighter, with dry production wood-fiber board, hair
Exhibition is got up, and the ratio of wet production fiberboard is smaller and smaller.Domestic almost all new life producing line in recent ten years is all using dry
Method production.Leading products are timber medium density fibre board (MDF)s, are density board in the market.With the development that floor produces, timber is highly dense
The yield of degree plate is developing.It is studied using cotton stalk production wood-based plate, has more than 20 years history, group of the domestic multiple units to cotton stalk
Texture is made, and chemical component, which has been done, compares scrutiny, also has many research achievements to cotton stalk particieboard manufacturing process, specifically,
Goal in research is to manufacture particieboard with cotton stalk.It is the cotton stalk skins consisted of fibers, cotton stalk since the characteristics of cotton stalk is outside stalk
Skin is difficult to be stripped with machinery, while smashing in process there are also some green bells in cotton stalk on cotton stalk, and cotton stalk bark fiber and green bell are beaten
Cotton fiber after broken is all mingled in cotton stalk particle, and such particle enters drying process and sizing process in continuous movement,
Fiber is wound mutually during exercise, becomes many comas to differ in size, and when sizing, glue can only be applied to coma table
Face is applied inside coma and is not glued, these sized comas and cotton stalk particle are paved into slab together, are hot pressed into wood shavings
Plate, the bond strength inside such particieboard is very poor, and particieboard national standard is not achieved.So if manufacturing plane with cotton stalk
Card, removes green bell and cotton stalk skins are technical barriers.Once someone tried to strip cotton stalk skins with a variety of mechanical means, and attempted shelling
Skin removes most of green cotton boll simultaneously, and as a result effect is all unsatisfactory.It is bothersome that green bell is extractd by hand, and is plucked endless.
The fiber for removing fibre equipment, removing in cotton stalk particle when attempting to using similar manufacture Flaxboard, does not also succeed.Ten
For many years, a domestic enterprise is final same from a set of large-scale cotton stalk Flakeboard Product Line of the famous instrument factory import of a Germany
Sample fails to produce cotton stalk particieboard.Then, there are some unit research wet process cotton stalk fiber board production technologies, individual factories in the country
Experimental production after a period of time is carried out as timber wet-process fiber board, due to waste water handling problem, also all stopped life
It produces.
Fiberboard is one kind using wood fibre or other plant fiber as primary raw material, prepares through fiber, applies adhesive,
Mat formation after fiber drying molding, then manufactured a kind of artificial board after hot pressing.Classify by bulk density, fiberboard can be divided into high density
Fiberboard, medium density fibre board (MDF), low density fiberboard.Since fiberboard is uniform in material, be widely used in furniture, floor, bed,
The processing of wallboard, packing box, furred ceiling etc..Existing fiber plate sanding powder is used mainly as low value-added product, is fired for boiler
The primary raw material of material and fragrant core.
But to there is mechanical strength mostly low for existing fibre board material, the problem of poor waterproof properties, therefore provides one kind
It is high-intensitive and can have positive meaning to furniture material preparation technical field with the fiberboard of waterproof.
Summary of the invention
Present invention mainly solves the technical issues of, it is low to there is mechanical strength mostly for current existing fibre board material,
The problem of poor waterproof properties, provides a kind of preparation method of water-proof high-strength fiberboard.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that:
A kind of preparation method of water-proof high-strength fiberboard, it is characterised in that specific preparation step are as follows:
Fiberboard slurry is injected in stainless steel mould, with hot press 60~80s of precompressed, repressurization to 10~12MPa, In
Continue 500~600s of compacting at 160~170 DEG C, dry, demoulding is after compacting up to water-proof high-strength fiberboard；
The preparation step of the fiberboard slurry are as follows:
Modified fibre material is put into autoclave, after sealing autoclave, is gone out after 10~12h of high-temperature high-voltage reaction
Material, obtains fiberboard slurry；
The preparation step of the modified fibre material are as follows:
(1) it is put into sonic oscillation instrument after mixing the hydrogen peroxide that pretreatment of fiber material and mass fraction are 10%, 50
With frequency ultrasound 1~2h of oscillating reactions of 20~25kHz at~60 DEG C, sonic oscillation after reaction, is separated by filtration and is filtered
Slag；
(2) it is fitted into reaction kettle after mixing the sodium silicate solution that filter residue obtained above and mass fraction are 25%, then
It is the salt acid for adjusting pH of 1mol/L to 2.0~3.0 that concentration is added dropwise into reaction kettle, is stirred to react 15~20min, is stirred to react knot
It is heated to 190~200 DEG C after beam, is filtered after continuing 3~5h of pyroreaction, isolated filter cake is modified fibre material；
The preparation step of the pretreatment of fiber material are as follows:
(1) it weighs pine bark to be put into steam blasting tank, is filled with vapor into steam blasting tank, until air pressure liter in tank
Up to 1.9~2.0MPa, constant temperature and pressure stand 50~60min, open steam-explosion jar tank mouth after standing and steam explosion product is made；
(2) it obtains being packed into enzyme after steam explosion product and concentration mix for the laccase solution and deionized water of 60U/mL by above-mentioned
It solves in tank, seal enzymatic vessel and is heated to 50~55 DEG C, heat preservation 5~6h of enzymolysis processing；
(3) after to above-mentioned heat preservation enzymolysis processing, enzymolysis product is obtained, enzymolysis product is fitted into vacuum oven,
70~80min is first dried, then is cooled to 78~84 DEG C and continues dry 40~50min, after drying, discharging is pre-processed
Fiber material.
In the specific preparation step of the water-proof high-strength fiberboard, the pressure of hot press precompressed is 5~6MPa.
In the preparation step of the fiberboard slurry, the pressure of high-temperature high-voltage reaction to 1.5~2.0MPa, high temperature high pressure reverse
The temperature answered is 160~180 DEG C.
In the preparation step (1) of the modified fibre material, hydrogen peroxide that pretreatment of fiber material and mass fraction are 10%
Mass ratio is 1:10.
In the preparation step (2) of the modified fibre material, the quality for the sodium silicate solution that filter residue and mass fraction are 25%
Than for 1:8.
In the preparation step (1) of the pretreatment of fiber material, be filled with into steam blasting tank vapor temperature be 180~
190℃。
In the preparation step (2) of the pretreatment of fiber material, laccase solution that steam explosion product and concentration are 60U/mL and
The mass ratio of deionized water is 10:1:50.
In the preparation step (3) of the pretreatment of fiber material, first dry temperature is 101~105 DEG C.
The method have the benefit that:
(1) present invention will obtain steam explosion product after its Steam explosion treatment, then gas explosion is produced first using pine bark as raw material
Object and laccase mixed enzymolysis obtain pretreatment of fiber material after gained enzymolysis product is dry, fine to pretreatment followed by hydrogen peroxide
Dimension material carries out oxidation processes, then by the reaction solution hybrid reaction of the fiber material and sodium metasilicate of oxidation processes and hydrochloric acid, is made and changes
Property fiber material, modified fibre material is then put into injection molding hot pressing after reacting in high-temperature high-pressure reaction kettle again, finally obtained waterproof is high
Strength plate, the present invention pass through steam blasting first and make pine bark defibering, then by itself and laccase mixed enzymolysis, utilize paint
Enzyme degradation lignin component therein, to form biological base adhesive, then the present invention utilizes hydrogen peroxide by pretreatment of fiber
The hydroxyl of cellulose surface therein is oxidized to carboxyl by material oxidation, recycle carboxyl and hydroxyl absorption it is fixed by sodium metasilicate and
Hydrochloric acid reaction generates the nano silica generated after orthosilicic acid by thermal decomposition, so that obtaining surface fixation is adsorbed with nano-silica
Modified fibre material, is then put into high-temperature high-pressure reaction kettle and reacts by the modified fibre material of SiClx, and high-temperature high-voltage reaction is one
A hydrolytic process, cellulose meeting partial hydrolysis during high-temperature high-voltage reaction, and hydrolyzing causes furfural to generate, the chaff of generation
Aldehyde further polycondensation can form polymer under high pressure, so that modified fibre resinification, the fibrous mechanical property of resinification
Improve, they are dispersed in fiberboard matrix in unordered shape, play the role of reinforcing rib, can be in fiberboard by extraneous stress
The approach that stress conduction is formed when impact, disperses extraneous stress, to improve the mechanical strength of fiberboard, furthermore high temperature and pressure
Under the conditions of furfural resin itself there is viscosity, fine and close entirety can will be connected between fiber in the case where hot pressing, will be prevented
Sealing molecule infiltration, and furfural resin itself good waterproof performance generated, improve the waterproof performance of fiberboard again；
(2) silica is bonded on modified fibre of the invention, silica surface is rich in silicone hydroxyl, in the heat in later period
During pressure, it is dehydrated between silicone hydroxyl and silicone hydroxyl by thermal response and generates the great Si-O-Si key of bond energy, to increase fiber
The Chemical bonding of intralamellar part improves its cohesive force, and then improves the mechanical strength of fiberboard again, while dioxy
SiClx surface can be huge, has splendid waterproof performance, therefore the presence of silica also improves the waterproof performance of fiberboard,
It has broad application prospects.
Specific embodiment
It weighs pine bark to be put into steam blasting tank, the water that temperature is 180~190 DEG C is filled with into steam blasting tank and is steamed
Gas, until air pressure is increased to 1.9~2.0MPa in tank, constant temperature and pressure stands 50~60min, opens steam-explosion jar tank mouth system after standing
Obtain steam explosion product；Steam explosion product is obtained and laccase solution and deionized water that concentration is 60U/mL are in mass ratio for above-mentioned
It is fitted into enzymatic vessel after 10:1:50 mixing, seals enzymatic vessel and is heated to 50~55 DEG C, heat preservation 5~6h of enzymolysis processing；To
After above-mentioned heat preservation enzymolysis processing, enzymolysis product is obtained, enzymolysis product is fitted into vacuum oven, at 101~105 DEG C
70~80min is first dried, then is cooled to 78~84 DEG C and continues dry 40~50min, after drying, discharging is pre-processed
Fiber material；Pretreatment of fiber material is obtained and hydrogen peroxide that mass fraction is 10% is to be put into after 1:10 is mixed in mass ratio for above-mentioned
In sonic oscillation instrument, with frequency ultrasound 1~2h of oscillating reactions of 20~25kHz at 50~60 DEG C, sonic oscillation reaction terminates
Afterwards, it is separated by filtration to obtain filter residue；It is in mass ratio 1:8 by the sodium silicate solution that filter residue obtained above and mass fraction are 25%
It is fitted into reaction kettle after mixing, then the salt acid for adjusting pH that dropwise addition concentration is 1mol/L into reaction kettle, to 2.0~3.0, stirring is anti-
15~20min is answered, 190~200 DEG C are heated to after being stirred to react, filters, separates after continuing 3~5h of pyroreaction
It is modified fibre material to filter cake；Modified fibre material obtained above is put into autoclave, after sealing autoclave,
Pressure is improved in autoclave to 1.5~2.0MPa, and increases temperature to 160~180 DEG C, 10~12h of high-temperature high-voltage reaction
After discharge, obtain fiberboard slurry；Fiberboard slurry obtained above is injected in stainless steel mould, with hot press with 5~
Pressure 60~80s of precompressed of 6MPa, repressurization to 10~12MPa continue 500~600s of compacting at 160~170 DEG C, compacting
After dry, demoulding up to water-proof high-strength fiberboard.
Example 1
The preparation of steam explosion product:
It weighs pine bark to be put into steam blasting tank, the vapor that temperature is 180 DEG C is filled with into steam blasting tank, until
Air pressure is increased to 1.9MPa in tank, and constant temperature and pressure stands 50min, opens steam-explosion jar tank mouth after standing and steam explosion product is made；
The preparation of pretreatment of fiber material:
(1) steam explosion product is obtained and laccase solution and deionized water that concentration is 60U/mL are in mass ratio for above-mentioned
It is fitted into enzymatic vessel after 10:1:50 mixing, seals enzymatic vessel and is heated to 50 DEG C, heat preservation enzymolysis processing 5h；
(2) after to above-mentioned heat preservation enzymolysis processing, enzymolysis product is obtained, enzymolysis product is fitted into vacuum oven,
70min is first dried at 101 DEG C, then is cooled to 78 DEG C and continues dry 40min, and after drying, discharging obtains pretreatment of fiber
Material；
The preparation of modified fibre material:
(1) pretreatment of fiber material is obtained and hydrogen peroxide that mass fraction is 10% is after 1:10 is mixed in mass ratio for above-mentioned
It is put into sonic oscillation instrument, with the frequency ultrasound oscillating reactions 1h of 20kHz at 50 DEG C, sonic oscillation after reaction, is filtered
Isolated filter residue；
It (2) is in mass ratio to be filled after 1:8 is mixed by the sodium silicate solution that filter residue obtained above and mass fraction are 25%
Enter in reaction kettle, then the salt acid for adjusting pH that dropwise addition concentration is 1mol/L into reaction kettle is stirred to react 15min, stirring is anti-to 2.0
It is heated to 190 DEG C after answering, is filtered after continuing pyroreaction 3h, isolated filter cake is modified fibre material；
The preparation of fiberboard slurry:
Modified fibre material obtained above is put into autoclave, after sealing autoclave, improves reaction under high pressure
Pressure is to 1.5MPa in kettle, and increases temperature to 160 DEG C, discharges after high-temperature high-voltage reaction 10h, obtains fiberboard slurry；
The preparation of water-proof high-strength fiberboard:
Fiberboard slurry obtained above is injected in stainless steel mould, with hot press with the pressure precompressed 60s of 5MPa, then
It is forced into 10MPa, continues to suppress 500s at 160 DEG C, dry, demoulding is after compacting up to water-proof high-strength fiberboard.
Example 2
The preparation of steam explosion product:
It weighs pine bark to be put into steam blasting tank, the vapor that temperature is 185 DEG C is filled with into steam blasting tank, until
Air pressure is increased to 1.9MPa in tank, and constant temperature and pressure stands 55min, opens steam-explosion jar tank mouth after standing and steam explosion product is made；
The preparation of pretreatment of fiber material:
(1) steam explosion product is obtained and laccase solution and deionized water that concentration is 60U/mL are in mass ratio for above-mentioned
It is fitted into enzymatic vessel after 10:1:50 mixing, seals enzymatic vessel and is heated to 53 DEG C, heat preservation enzymolysis processing 6h；
(2) after to above-mentioned heat preservation enzymolysis processing, enzymolysis product is obtained, enzymolysis product is fitted into vacuum oven,
75min is first dried at 103 DEG C, then is cooled to 80 DEG C and continues dry 45min, and after drying, discharging obtains pretreatment of fiber
Material；
The preparation of modified fibre material:
(1) pretreatment of fiber material is obtained and hydrogen peroxide that mass fraction is 10% is after 1:10 is mixed in mass ratio for above-mentioned
It is put into sonic oscillation instrument, with the frequency ultrasound oscillating reactions 2h of 23kHz at 55 DEG C, sonic oscillation after reaction, is filtered
Isolated filter residue；
It (2) is in mass ratio to be filled after 1:8 is mixed by the sodium silicate solution that filter residue obtained above and mass fraction are 25%
Enter in reaction kettle, then the salt acid for adjusting pH that dropwise addition concentration is 1mol/L into reaction kettle is stirred to react 18min, stirring is anti-to 2.5
It is heated to 195 DEG C after answering, is filtered after continuing pyroreaction 4h, isolated filter cake is modified fibre material；
The preparation of fiberboard slurry:
Modified fibre material obtained above is put into autoclave, after sealing autoclave, improves reaction under high pressure
Pressure is to 1.8MPa in kettle, and increases temperature to 170 DEG C, discharges after high-temperature high-voltage reaction 11h, obtains fiberboard slurry；
The preparation of water-proof high-strength fiberboard:
By fiberboard slurry obtained above inject stainless steel mould in, with hot press with the pressure precompressed 60 of 6MPa~
80s, repressurization to 11MPa continue to suppress 550s at 165 DEG C, and dry, demoulding is after compacting up to water-proof high-strength fiber
Plate.
Example 3
The preparation of steam explosion product:
It weighs pine bark to be put into steam blasting tank, the vapor that temperature is 190 DEG C is filled with into steam blasting tank, until
Air pressure is increased to 2.0MPa in tank, and constant temperature and pressure stands 60min, opens steam-explosion jar tank mouth after standing and steam explosion product is made；
The preparation of pretreatment of fiber material:
(1) steam explosion product is obtained and laccase solution and deionized water that concentration is 60U/mL are in mass ratio for above-mentioned
It is fitted into enzymatic vessel after 10:1:50 mixing, seals enzymatic vessel and is heated to 55 DEG C, heat preservation enzymolysis processing 6h；
(2) after to above-mentioned heat preservation enzymolysis processing, enzymolysis product is obtained, enzymolysis product is fitted into vacuum oven,
80min is first dried at 105 DEG C, then is cooled to 84 DEG C and continues dry 50min, and after drying, discharging obtains pretreatment of fiber
Material；
The preparation of modified fibre material:
(1) pretreatment of fiber material is obtained and hydrogen peroxide that mass fraction is 10% is after 1:10 is mixed in mass ratio for above-mentioned
It is put into sonic oscillation instrument, with the frequency ultrasound oscillating reactions 2h of 25kHz at 60 DEG C, sonic oscillation after reaction, is filtered
Isolated filter residue；
It (2) is in mass ratio to be filled after 1:8 is mixed by the sodium silicate solution that filter residue obtained above and mass fraction are 25%
Enter in reaction kettle, then the salt acid for adjusting pH that dropwise addition concentration is 1mol/L into reaction kettle is stirred to react 20min, stirring is anti-to 3.0
It is heated to 200 DEG C after answering, is filtered after continuing pyroreaction 5h, isolated filter cake is modified fibre material；
The preparation of fiberboard slurry:
Modified fibre material obtained above is put into autoclave, after sealing autoclave, improves reaction under high pressure
Pressure is to 2.0MPa in kettle, and increases temperature to 180 DEG C, discharges after high-temperature high-voltage reaction 12h, obtains fiberboard slurry；
The preparation of water-proof high-strength fiberboard:
Fiberboard slurry obtained above is injected in stainless steel mould, with hot press with the pressure precompressed 80s of 6MPa, then
It is forced into 12MPa, continues to suppress 600s at 170 DEG C, dry, demoulding is after compacting up to water-proof high-strength fiberboard.
Comparative example 1 and the preparation method of example 1 are essentially identical, and difference is to replace modification of the invention with general fibre material
Fiber material.
Comparative example 2 and the preparation method of example 1 are essentially identical, and difference is not introduce silica into fiber material.Point
The other fiberboard in the present invention and comparative example carries out performance detection, and testing result is as shown in table 1:
Detection method:
Compression strength is detected with omnipotent mechanics machine.
Static bending intensity is detected with omnipotent mechanics machine.
Water absorption rate: the fiberboard plate in the comparative example and embodiment that quality is M1 is taken, the ring that temperature is 22 DEG C is all put in
Under border, its weight under water that measures again after 72h is denoted as M2, and water absorption rate is (M2-M1)/M1.
1 rock wool board performance measurement result of table
By table 1, it can be seen that fiberboard prepared by the present invention, waterproof performance is preferable, mechanical strength is higher, has wide
Application prospect.
The foregoing is merely preferred modes of the invention, are not intended to limit the invention, all in spirit and original of the invention
Within then, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of preparation method of water-proof high-strength fiberboard, it is characterised in that specific preparation step are as follows:
Fiberboard slurry is injected in stainless steel mould, with hot press 60~80s of precompressed, repressurization to 10~12MPa, 160
Continue 500~600s of compacting at~170 DEG C, dry, demoulding is after compacting up to water-proof high-strength fiberboard；
The preparation step of the fiberboard slurry are as follows:
Modified fibre material is put into autoclave, after sealing autoclave, is discharged after 10~12h of high-temperature high-voltage reaction,
Obtain fiberboard slurry；
The preparation step of the modified fibre material are as follows:
(1) it is put into sonic oscillation instrument after mixing the hydrogen peroxide that pretreatment of fiber material and mass fraction are 10%, 50~60
With frequency ultrasound 1~2h of oscillating reactions of 20~25kHz at DEG C, sonic oscillation after reaction, is separated by filtration to obtain filter residue；
(2) it is fitted into reaction kettle after mixing the sodium silicate solution that filter residue obtained above and mass fraction are 25%, then to anti-
It answers the salt acid for adjusting pH that dropwise addition concentration is 1mol/L in kettle to 2.0~3.0,15~20min is stirred to react, after being stirred to react
190~200 DEG C are heated to, is filtered after continuing 3~5h of pyroreaction, isolated filter cake is modified fibre material；
The preparation step of the pretreatment of fiber material are as follows:
(1) it weighs pine bark to be put into steam blasting tank, is filled with vapor into steam blasting tank, until air pressure is increased in tank
1.9~2.0MPa, constant temperature and pressure stand 50~60min, open steam-explosion jar tank mouth after standing and steam explosion product is made；
(2) it obtains being packed into enzymatic vessel after steam explosion product and concentration mix for the laccase solution and deionized water of 60U/mL by above-mentioned
In, it seals enzymatic vessel and is heated to 50~55 DEG C, heat preservation 5~6h of enzymolysis processing；
(3) after to above-mentioned heat preservation enzymolysis processing, enzymolysis product is obtained, enzymolysis product is fitted into vacuum oven, is first done
Dry 70~80min, then be cooled to 78~84 DEG C and continue dry 40~50min, after drying, discharging obtains pretreatment of fiber
Material.
2. a kind of preparation method of water-proof high-strength fiberboard according to claim 1, it is characterised in that: the waterproof is high
In the specific preparation step of strength plate, the pressure of hot press precompressed is 5~6MPa.
3. a kind of preparation method of water-proof high-strength fiberboard according to claim 1, it is characterised in that: the fiberboard
In the preparation step of slurry, the pressure of high-temperature high-voltage reaction to 1.5~2.0MPa, the temperature of high-temperature high-voltage reaction is 160~
180℃。
4. a kind of preparation method of water-proof high-strength fiberboard according to claim 1, it is characterised in that: described modified fine
In the preparation step (1) for tieing up material, the mass ratio for the hydrogen peroxide that pretreatment of fiber material and mass fraction are 10% is 1:10.
5. a kind of preparation method of water-proof high-strength fiberboard according to claim 1, it is characterised in that: described modified fine
In the preparation step (2) for tieing up material, the mass ratio for the sodium silicate solution that filter residue and mass fraction are 25% is 1:8.
6. a kind of preparation method of water-proof high-strength fiberboard according to claim 1, it is characterised in that: the pretreatment
In the preparation step (1) of fiber material, the temperature that vapor is filled with into steam blasting tank is 180~190 DEG C.
7. a kind of preparation method of water-proof high-strength fiberboard according to claim 1, it is characterised in that: the pretreatment
In the preparation step (2) of fiber material, steam explosion product and the concentration laccase solution for being 60U/mL and the mass ratio of deionized water are
10:1:50。
8. a kind of preparation method of water-proof high-strength fiberboard according to claim 1, it is characterised in that: the pretreatment
In the preparation step (3) of fiber material, first dry temperature is 101~105 DEG C.
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| CN201910761424.2A CN110509391A (en) | 2019-08-18 | 2019-08-18 | A kind of preparation method of water-proof high-strength fiberboard |
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| CN201910761424.2A CN110509391A (en) | 2019-08-18 | 2019-08-18 | A kind of preparation method of water-proof high-strength fiberboard |
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| CN201910761424.2A Withdrawn CN110509391A (en) | 2019-08-18 | 2019-08-18 | A kind of preparation method of water-proof high-strength fiberboard |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111605032A (en) * | 2020-05-26 | 2020-09-01 | 泉州市瑞秀凯赛建筑材料科技有限公司 | Preparation method of baking-free brick |
| CN113387616A (en) * | 2021-08-04 | 2021-09-14 | 深圳市新佰人建筑材料科技有限公司 | Anti-fouling and anti-cracking artificial marble and preparation method thereof |
-
2019
- 2019-08-18 CN CN201910761424.2A patent/CN110509391A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111605032A (en) * | 2020-05-26 | 2020-09-01 | 泉州市瑞秀凯赛建筑材料科技有限公司 | Preparation method of baking-free brick |
| CN113387616A (en) * | 2021-08-04 | 2021-09-14 | 深圳市新佰人建筑材料科技有限公司 | Anti-fouling and anti-cracking artificial marble and preparation method thereof |
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