CN110142844A - A kind of preparation method of non-glue fibre board - Google Patents
A kind of preparation method of non-glue fibre board Download PDFInfo
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- CN110142844A CN110142844A CN201910370826.XA CN201910370826A CN110142844A CN 110142844 A CN110142844 A CN 110142844A CN 201910370826 A CN201910370826 A CN 201910370826A CN 110142844 A CN110142844 A CN 110142844A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/025—Controlling the process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/16—Inorganic impregnating agents
- B27K3/20—Compounds of alkali metals or ammonium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/04—Combined bleaching or impregnating and drying of wood
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- 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
- B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/10—Treatment with macromolecular organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K2240/00—Purpose of the treatment
- B27K2240/15—Decontamination of previously treated wood
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a kind of preparation methods of non-glue fibre board, maleic anhydride is dissolved in dimethylformamide, hydroquinone is added, stirring sufficiently dissolution, the sugarcane fiber of coupling agent modified processing is added, is stirred continuously reaction, filtering is cleaned with acetone, Soxhlet extraction in acetone obtains maleic anhydride modified sugarcane fiber；It is added silane coupling agent into ethyl alcohol, after stirring hydrolysis, the silicon carbide powder of drying is added, after stirring in oil bath, is cooled to room temperature, filters, washes, the silicon carbide powder of dry organic modification of surface；The silicon carbide powder of the rice-straw fibre of oxygenation pretreatment, the nanometer lanthanum sesquioxide of surface grafting and maleic anhydride modified sugarcane fiber, organic modification of surface is mixed, ammonium polyphosphate is dissolved in water wiring solution-forming to be applied in mixture, it is dry in drying box, manually mat formation, be sent into after pre-molding in hot press after hot pressing, non-glue fibre board is made in release after cooling.
Description
Technical field
The invention belongs to fiberboard fields, and in particular to a kind of preparation method of non-glue fibre board.
Background technique
Since natural fiber has many advantages, such as that at low cost, specific modulus, specific strength are high, synthetic fibers system is substituted with natural fiber
Standby fibre reinforced composites have important practical significance.
With the rapid development of industry of artificial boards, wood raw material imbalance between supply and demand and the awake release problem of free first are increasingly prominent.
In addition, wood-based plate is a kind of combustible material with very conflagration hidden danger, fire is to threaten public security and obstruction social development
One of major casualty.The present invention develops high-performance doors structure non-glue fibre board using crop residue as raw material, delays
Raw material of artifical plate problem in short supply has been solved, has solved the problems, such as that free first is waken up and discharges.
Summary of the invention
The purpose of the present invention is being directed to existing problem, a kind of preparation method of non-glue fibre board is provided, according to the party
The non-glue fibre board of method preparation has excellent mechanical property, crocking resistance and flame retardant property.
The present invention is achieved by the following technical solutions:
A kind of preparation method of non-glue fibre board, which is characterized in that include the following steps, following raw materials by weight:
(1) method of maleic anhydride modified sugarcane fiber:
By maleic anhydride, 5:7 is dissolved in dimethylformamide by volume, and the hydroquinone of maleic anhydride total amount 1% is added, stirs
It mixes 5-10min sufficiently to dissolve, the sugarcane fiber of 60-90 parts of coupling agent modified processing is added by solid-to-liquid ratio 1:20, is stirred continuously,
4-5h is reacted at 100-105 DEG C, filtering is cleaned with acetone, and Soxhlet extraction 20-24h, obtains maleic anhydride modified in acetone
Sugarcane fiber；
It is silane coupler modified to improve sugarcane fiber and rice-straw fibre using the modified sugarcane fiber of the method for silane coupling agent
Interface compatibility, help to improve the thermal stability of composite fiber plate, silane coupler modified composite fiber plate thermal decomposition
Activation energy is high, mechanical property is good；
It is modified using sugarcane fiber of the maleic anhydride to coupling agent modification, the grafting rate of modified sugarcane fiber is high, horse
The hydroxyl generation chemical reaction for coming acid anhydrides and sugarcane fiber surface forms ester bond, and the thermal stability of modified sugarcane fiber obviously mentions
Height, it is excellent to the performance improvement effect of composite fiber plate；
(2) the interface modification processing method of silicon carbide powder:
1-2 parts of silane coupling As 171 are added into the ethyl alcohol of 40-50 part 95%, after stirring hydrolysis, are added 7-8 parts in 105-115
DEG C drying 50-70min silicon carbide powder, in 65-70 DEG C of oil bath stir 1-2h after, be cooled to room temperature, filter, wash,
The silicon carbide powder of dry organic modification of surface at 80-85 DEG C；
Organic modification of surface processing is carried out to silicon carbide powder using silane coupling A 171, after appropriate silane coupling agent processing
Silicon carbide powder introducing, can effectively improve the crocking resistance of composite fiber plate；
(3) preparation of non-glue fibre board:
By gained in the rice-straw fibre of 20-30 parts of oxygenation pretreatments, the nanometer lanthanum sesquioxide of 1-2 parts of surface graftings and (1), (2)
Material mixes, and 3.2-4.8 parts of ammonium polyphosphate 1:15 are dissolved in water wiring solution-forming and are applied in mixture, in 80-85 DEG C of drying box
Middle drying is manually mated formation, is sent into 180-190 DEG C of hot press after pre-molding after hot pressing 5-15min, unloaded after cooling
Non-glue fibre board is made in pressure；
It uses concentration for 8% sodium hydrate aqueous solution modification rice-straw fibre, part hemicellulose in rice-straw fibre can be removed
Element makes rice-straw fibre surface become coarse, is effectively improved the mechanical property of composite fiber plate；
Surface organic processing is carried out to nanometer lanthanum sesquioxide using silane coupling agent KH590, can be improved composite fiber plate
Impact strength, bending strength.
Further, in step (1) bagasse coupling agent modified processing method: 60-90 parts of sugarcane fibers are put into 80-85
In DEG C drying box after dry 5-6h, the acetone soln for the Silane coupling agent KH550 that mass fraction is 6% is added by solid-to-liquid ratio 1:20,
It is filtered after impregnating 45-48h, with acetone washing 4-6 times, is air-dried at room temperature 23-25h, place into dry 20- in 80-85 DEG C of baking oven
For 24 hours, the sugarcane fiber of coupling agent modified processing is obtained.
Further, in step (3) rice-straw fibre oxygenation pretreatment method: be in mass ratio by 20-30 parts of rice-straw fibres
1:20 is put into the modifying agent sodium hydrate aqueous solution that concentration is 8%, after immersion treatment 7-9h, separates and be washed to neutrality,
It dries in 80-85 DEG C of drying box to constant weight, obtains the rice-straw fibre of oxygenation pretreatment.
Further, in step (3) nanometer lanthanum sesquioxide surface organic method: by 1-2 parts of nanometers three oxidation two
Lanthanum is dried in vacuo 20-30min at 100-105 DEG C, and acetic anhydride is added dropwise in the aqueous acetone solution for being 70% to mass fraction and adjusts pH
For 4-5,0.1-0.2 parts of silane coupling agent KH590 are added and vacuum drying nanometer lanthanum sesquioxide are added, after stirring hydrolysis
Matter disperse 10-20s after ultrasonic vibration 30-40min, filter, be dried in vacuo surface grafting nanometer lanthanum sesquioxide.
Further, drying in step (3) to moisture content is 10-12%, hot pressing pressure 6-8MPa.
The present invention has the advantage that compared with prior art
(1) silane coupler modified to improve sugarcane fiber and straw using the modified sugarcane fiber of the method for silane coupling agent
The interface compatibility of fiber helps to improve the thermal stability of composite fiber plate, silane coupler modified composite fiber plate heat
Decomposition activation energy is high, mechanical property is good；
It is modified using sugarcane fiber of the maleic anhydride to coupling agent modification, the grafting rate of modified sugarcane fiber is high, horse
The hydroxyl generation chemical reaction for coming acid anhydrides and sugarcane fiber surface forms ester bond, and the thermal stability of modified sugarcane fiber obviously mentions
Height, it is excellent to the performance improvement effect of composite fiber plate.
(2) organic modification of surface processing is carried out to silicon carbide powder using silane coupling A 171, it is appropriate silane coupled
The introducing of agent treated silicon carbide powder, can effectively improve the crocking resistance of composite fiber plate.
(3) it uses concentration for 8% sodium hydrate aqueous solution modification rice-straw fibre, can remove in the middle part of rice-straw fibre
Divide hemicellulose, so that rice-straw fibre surface is become coarse, be effectively improved the mechanical property of composite fiber plate；
Surface organic processing is carried out to nanometer lanthanum sesquioxide using silane coupling agent KH590, can be improved composite fiber plate
Impact strength, bending strength；
Ammonium polyphosphate restrained effectively being thermally decomposed for multitudinous slag fiber, promote into charcoal, the addition of ammonium polyphosphate effectively reduces
The heat release rate and total heat release of compound non-glue fibre board also reduce the cigarette rate of release of compound non-glue fibre board and total
Smoke release.
Specific embodiment
Embodiment 1
A kind of preparation method of non-glue fibre board, which is characterized in that include the following steps, following raw materials by weight:
(1) method of maleic anhydride modified sugarcane fiber:
By maleic anhydride, 5:7 is dissolved in dimethylformamide by volume, and the hydroquinone of maleic anhydride total amount 1% is added, stirs
It mixes 10min sufficiently to dissolve, the sugarcane fiber of 90 parts of coupling agent modified processing is added by solid-to-liquid ratio 1:20, is stirred continuously, at 105 DEG C
Lower reaction 4h, filtering are cleaned with acetone, and Soxhlet extraction for 24 hours, obtains maleic anhydride modified sugarcane fiber in acetone；
Wherein, the coupling agent modified processing method of bagasse: after 90 parts of sugarcane fibers are put into 85 DEG C of drying boxes dry 5h, by solid
The acetone soln for the Silane coupling agent KH550 that mass fraction is 6% is added in liquor ratio 1:20, filters after impregnating 48h, with acetone washing 6
It is secondary, it is air-dried at room temperature 25h, dry 20h in 85 DEG C of baking ovens is placed into, obtains the sugarcane fiber of coupling agent modified processing；
(2) the interface modification processing method of silicon carbide powder:
2 parts of silane coupling As 171 are added into 50 part 95% of ethyl alcohol, after stirring hydrolysis, are added 8 parts in 115 DEG C of drying 50min
Silicon carbide powder, in 70 DEG C of oil baths stir 2h after, be cooled to room temperature, filter, wash, it is dry that surface is organic at 85 DEG C
Change modified silicon carbide powder；
(3) preparation of non-glue fibre board:
The nanometer lanthanum sesquioxide of the rice-straw fibre of 30 parts of oxygenation pretreatments, 2 parts of surface graftings is mixed with resulting material in (1), (2)
It is even, 4.8 parts of ammonium polyphosphate 1:15 are dissolved in water wiring solution-forming and are applied in mixture, it is dry in 85 DEG C of drying boxes, manually
Mat formation, be sent into after pre-molding in 190 DEG C of hot presses after hot pressing 5min, non-glue fibre board is made in release after cooling；
Wherein, the oxygenation pretreatment method of rice-straw fibre: being that be put into concentration be 8% to change to 1:20 by 30 parts of rice-straw fibres in mass ratio
Property agent sodium hydrate aqueous solution in, after immersion treatment 9h, separate and be washed to neutrality, dried in 85 DEG C of drying boxes to constant weight,
Obtain the rice-straw fibre of oxygenation pretreatment；
The surface organic method of nanometer lanthanum sesquioxide: being dried in vacuo 20min at 105 DEG C for 2 parts of nanometer lanthanum sesquioxides,
It is 5 that acetic anhydride is added dropwise in the aqueous acetone solution for being 70% to mass fraction and adjusts pH, and 0.2 part of silane coupling agent KH590 is added, stirs
After mixing hydrolysis, vacuum drying nanometer lanthanum sesquioxide is added, ultrasonic vibration 40min after homogenous disperse 20s, filtering, vacuum are dry
The dry nanometer lanthanum sesquioxide for obtaining surface grafting；
Drying to moisture content is 12%, hot pressing pressure 8MPa.
Embodiment 2
A kind of preparation method of non-glue fibre board, which is characterized in that include the following steps, following raw materials by weight:
(1) method of maleic anhydride modified sugarcane fiber:
By maleic anhydride, 5:7 is dissolved in dimethylformamide by volume, and the hydroquinone of maleic anhydride total amount 1% is added, stirs
It mixes 5min sufficiently to dissolve, the sugarcane fiber of 60 parts of coupling agent modified processing is added by solid-to-liquid ratio 1:20, is stirred continuously, at 100 DEG C
Lower reaction 5h, filtering are cleaned with acetone, and Soxhlet extraction 20h, obtains maleic anhydride modified sugarcane fiber in acetone；
Wherein, the coupling agent modified processing method of bagasse: after 60 parts of sugarcane fibers are put into 80 DEG C of drying boxes dry 6h, by solid
The acetone soln for the Silane coupling agent KH550 that mass fraction is 6% is added in liquor ratio 1:20, filters after impregnating 45h, with acetone washing 4
It is secondary, it is air-dried at room temperature 23h, drying in 80 DEG C of baking ovens is placed into and for 24 hours, obtains the sugarcane fiber of coupling agent modified processing；
(2) the interface modification processing method of silicon carbide powder:
1 part of silane coupling A 171 is added into 40 part 95% of ethyl alcohol, after stirring hydrolysis, is added 7 parts in 105 DEG C of drying 70min
Silicon carbide powder, in 65 DEG C of oil baths stir 2h after, be cooled to room temperature, filter, wash, it is dry that surface is organic at 80 DEG C
Change modified silicon carbide powder；
(3) preparation of non-glue fibre board:
The nanometer lanthanum sesquioxide of the rice-straw fibre of 20 parts of oxygenation pretreatments, 1 part of surface grafting is mixed with resulting material in (1), (2)
It is even, 3.2 parts of ammonium polyphosphate 1:15 are dissolved in water wiring solution-forming and are applied in mixture, it is dry in 80 DEG C of drying boxes, manually
Mat formation, be sent into after pre-molding in 180 DEG C of hot presses after hot pressing 15min, non-glue fibre board is made in release after cooling；
Wherein, the oxygenation pretreatment method of rice-straw fibre: being that be put into concentration be 8% to change to 1:20 by 20 parts of rice-straw fibres in mass ratio
Property agent sodium hydrate aqueous solution in, after immersion treatment 7h, separate and be washed to neutrality, dried in 80 DEG C of drying boxes to constant weight,
Obtain the rice-straw fibre of oxygenation pretreatment；
The surface organic method of nanometer lanthanum sesquioxide: being dried in vacuo 30min at 100 DEG C for 2 parts of nanometer lanthanum sesquioxides,
It is 4 that acetic anhydride is added dropwise in the aqueous acetone solution for being 70% to mass fraction and adjusts pH, and 0.1 part of silane coupling agent KH590 is added, stirs
After mixing hydrolysis, vacuum drying nanometer lanthanum sesquioxide is added, ultrasonic vibration 30min after homogenous disperse 10s, filtering, vacuum are dry
The dry nanometer lanthanum sesquioxide for obtaining surface grafting；
Drying to moisture content is 10%, hot pressing pressure 6MPa.
The non-glue fibre board intensity of hot pressing of the embodiment of the present invention meets standard GB/T/T4897.6-2003 requirement, and
And there is excellent mechanical property, crocking resistance and flame retardant property；The tensile strength of non-glue fibre board is 62MPa, impact is strong
Degree is 19KJ/m2, there is excellent mechanical property；The limit oxygen index of non-glue fibre board is 28%, has excellent anti-flammability
Energy；The coefficient of friction of non-glue fibre board is 0.21, and wear rate is 1.17 × 10-6mm3/ (Nm) has excellent rub resistance
Energy.
Claims (5)
1. a kind of preparation method of non-glue fibre board, which is characterized in that include the following steps, following raw materials by weight:
(1) method of maleic anhydride modified sugarcane fiber:
By maleic anhydride, 5:7 is dissolved in dimethylformamide by volume, and the hydroquinone of maleic anhydride total amount 1% is added, stirs
It mixes 5-10min sufficiently to dissolve, the sugarcane fiber of 60-90 parts of coupling agent modified processing is added by solid-to-liquid ratio 1:20, is stirred continuously,
4-5h is reacted at 100-105 DEG C, filtering is cleaned with acetone, and Soxhlet extraction 20-24h, obtains maleic anhydride modified in acetone
Sugarcane fiber；
(2) the interface modification processing method of silicon carbide powder:
1-2 parts of silane coupling As 171 are added into the ethyl alcohol of 40-50 part 95%, after stirring hydrolysis, are added 7-8 parts in 105-115
DEG C drying 50-70min silicon carbide powder, in 65-70 DEG C of oil bath stir 1-2h after, be cooled to room temperature, filter, wash,
The silicon carbide powder of dry organic modification of surface at 80-85 DEG C；
(3) preparation of non-glue fibre board:
By gained in the rice-straw fibre of 20-30 parts of oxygenation pretreatments, the nanometer lanthanum sesquioxide of 1-2 parts of surface graftings and (1), (2)
Material mixes, and 3.2-4.8 parts of ammonium polyphosphate 1:15 are dissolved in water wiring solution-forming and are applied in mixture, in 80-85 DEG C of drying box
Middle drying is manually mated formation, is sent into 180-190 DEG C of hot press after pre-molding after hot pressing 5-15min, unloaded after cooling
Non-glue fibre board is made in pressure.
2. a kind of preparation method of non-glue fibre board according to claim 1, which is characterized in that bagasse in step (1)
Coupling agent modified processing method:
After 60-90 parts of sugarcane fibers are put into 80-85 DEG C of drying box dry 5-6h, mass fraction, which is added, by solid-to-liquid ratio 1:20 is
The acetone soln of 6% Silane coupling agent KH550 filters after impregnating 45-48h, with acetone washing 4-6 times, is air-dried at room temperature 23-
25h places into dry 20-24h in 80-85 DEG C of baking oven, obtains the sugarcane fiber of coupling agent modified processing.
3. a kind of preparation method of non-glue fibre board according to claim 1, which is characterized in that straw is fine in step (3)
The oxygenation pretreatment method of dimension:
In mass ratio it is that 1:20 is put into the modifying agent sodium hydrate aqueous solution that concentration is 8% by 20-30 parts of rice-straw fibres, impregnates
After handling 7-9h, neutrality is separated and be washed to, the straw fibre for obtaining oxygenation pretreatment to constant weight is dried in 80-85 DEG C of drying box
Dimension.
4. a kind of preparation method of non-glue fibre board according to claim 1, which is characterized in that nanometer three in step (3)
Aoxidize the surface organic method of two lanthanums:
1-2 parts of nanometer lanthanum sesquioxides are dried in vacuo 20-30min at 100-105 DEG C, the acetone for being 70% to mass fraction
It is 4-5 that acetic anhydride is added dropwise in aqueous solution and adjusts pH, and 0.1-0.2 parts of silane coupling agent KH590 are added, and after stirring hydrolysis, is added true
The dry nanometer lanthanum sesquioxide of sky, ultrasonic vibration 30-40min after homogenous disperse 10-20s, filter, be dried in vacuo surface connects
The nanometer lanthanum sesquioxide of branch.
5. a kind of preparation method of non-glue fibre board according to claim 1, which is characterized in that dried extremely in step (3)
Moisture content is 10-12%, hot pressing pressure 6-8MPa.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114030256A (en) * | 2021-08-07 | 2022-02-11 | 广东电网有限责任公司广州供电局 | Polypropylene composite material and preparation method and application thereof |
| CN114921119A (en) * | 2022-07-07 | 2022-08-19 | 宜兴市康辉耐火材料有限公司 | Silicon carbide coating with high heat conduction and high heat radiation and preparation method thereof |
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