CN110528336A - A kind of high tensile high density fiberboard and its environment-friendly preparation method thereof - Google Patents
A kind of high tensile high density fiberboard and its environment-friendly preparation method thereof Download PDFInfo
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- CN110528336A CN110528336A CN201910686254.6A CN201910686254A CN110528336A CN 110528336 A CN110528336 A CN 110528336A CN 201910686254 A CN201910686254 A CN 201910686254A CN 110528336 A CN110528336 A CN 110528336A
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- density fiberboard
- high density
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J1/00—Fibreboard
Abstract
The invention discloses a kind of high tensile high density fiberboard and its environment-friendly preparation method thereofs, belong to Fibreboard Production technical field.This method is carried out dehydrating to obtain wet base the specific process steps are as follows: nano-cellulose is placed in cold press, then dewatered wet base is carried out hot-pressing drying, and high tensile high density fiberboard is made.High tensile high density fiberboard disclosed by the invention is environmentally protective, light weight and degradable, is based on these characteristics, is with a wide range of applications in aerospace, building decoration, communications and transportation etc. using ultra light composite field；And it needs to consume big work to break in fracture, and elasticity modulus is high, is expected to as a kind of novel light bullet resistant material.
Description
Technical field
The present invention relates to Fibreboard Production technical field, in particular to a kind of high tensile high density fiberboard and its green
Color preparation method.
Background technique
Cellulose is one of the most abundant natural polymers in nature, and nano-cellulose refers to that diameter is less than
The super-micro-fine fibres of 100 nm and the minimal physical structural unit of cellulose, it is such as highly crystalline with many good characteristics
Degree, high-purity, high Young's modulus, high intensity, high-hydrophilic, hyperfine structure and high transparency etc. have natural fiber in addition
Plain lightweight, degradable, bio-compatible and the characteristics such as renewable, papermaking, building, automobile, food, cosmetics, electronic product,
There is huge potential application foreground in the fields such as medicine.
Nano-cellulose is due to great specific surface area and surface hydroxyl abundant, from densification ability and self-bonding
Ability is strong.The high tensile strength fiber plate not only environmentally protective formaldehydeless discharge, but also its physical machine prepared by nano-cellulose
Tool performance is higher than some other traditional wood base composite material, and light weight is degradable, is based on these characteristics, in aerospace, builds
Decoration, communications and transportation etc. is built to be with a wide range of applications using ultra light composite field；And it needs to disappear in fracture
Big work to break is consumed, and elasticity modulus is high, and injury of the kinetic energy to human body of bullet can be greatly decreased, is expected to as a kind of novel
Lightweight bulletproof material.
Summary of the invention
It is an object of the invention to be directed to the deficiency of existing fibrous plate performance, a kind of high density of high tensile is provided
Fiberboard and its environment-friendly preparation method thereof.
The purpose of the present invention is achieved through the following technical solutions.
A kind of environment-friendly preparation method thereof of high tensile high density fiberboard, method includes the following steps:
(1) vegetable-fibre slurry is subjected to enzymolysis processing；
(2) slurry after step (1) enzymatic hydrolysis is subjected to mechanical lapping processing；
(3) step (2) mechanical lapping treated slurry is subjected to enzymolysis processing；
(4) slurry after step (3) enzymatic hydrolysis mechanical lapping is carried out to handle to obtain nano-cellulose；
(5) gained nano-cellulose filter cloth package is placed in cold press and is carried out dehydrating to obtain wet base；
(6) the wet base cold pressing treatment of gained is placed, wet base is made to be formed, wet base is subjected to hot-pressing drying after molding, high stretching is made
Strength high density fiberboard.
Preferably, in step (1) (3), slurry concentration is 1-5 wt% when the enzymolysis processing, and pH when enzymolysis processing is
4.5-6, temperature are 35-60 DEG C, and the time is 2-5 h.
Preferably, in step (1) (3), the enzyme of the enzymatic hydrolysis is the enzyme that fibre structure can be made loose.
It is further preferred that the enzyme of the enzymatic hydrolysis is cellulose complex enzyme, mashing enzyme or restriction endonuclease.Most preferably inscribe
Enzyme.
Preferably, in step (2) (4), slurry concentration is 1-2 wt% when the nanosizing mechanical lapping is handled.
Preferably, in step (2), when the nanosizing mechanical lapping is handled, pressure is 0-20 MPa, grinds number 15-
25 times.
Preferably, in step (4), when the nanosizing mechanical lapping is handled, pressure is 0-40 MPa, grinds number 40-
50 times.
Preferably, in step (2) (4), the equipment of the nanosizing mechanical lapping is that plant fiber can be made to be dissociated into micro-nano
The equipment of rice fibril.
Preferably, in step (5), the concentration of the nano-cellulose is 10-14 wt%, quantification of 0.39-0.65 g/
cm2。
Preferably, in step (5), the mesh number of the filter cloth is 400-600 mesh；The pressure of the dehydration is 0-0.4
MPa。
Preferably, in step (6), the pressure of the sizing is 0-0.4 MPa, and the time is 3-6 h.
Preferably, the pressure of the drying is 0.05-0.1 MPa, and dry temperature is 60-70 DEG C, and the dry time is
24-36 h。
Preferably, specific step is as follows for this method:
(1) vegetable-fibre slurry is subjected to enzymolysis processing using restriction endonuclease, slurry concentration is 1-5 wt%, pH when enzymolysis processing
For 4.5-6, temperature is 35-60 DEG C, and the time is 2-5 h；
(2) pulp dilution after step (1) enzymatic hydrolysis to 1-2 wt% is subjected to mechanical lapping processing, pressure is 0-20 MPa, grinding
Number 15-25 times；
(3) step (2) mechanical lapping treated slurry is subjected to enzymolysis processing using restriction endonuclease, treatment conditions and step (1)
It is identical；
(4) pulp dilution after step (3) enzymatic hydrolysis to 1-2 wt% is subjected to mechanical lapping processing, pressure is 0-40 MPa, grinding
Number 40-50 times obtains nano-cellulose；
It (5) is 10-14 wt%, quantification of 0.39-0.65 g/cm by 257-360 g concentration2Nano-cellulose 400-600
Purpose filter cloth package is placed in cold press, is carried out dehydrating under the pressure of 0-0.4 MPa, obtains wet base after dehydration completely；
(6) wet base cold pressing treatment is placed into 3-6 h, so that it is formed at this pressure, wet base after molding is transferred in baking oven,
It is 0.05-0.1 MPa in pressure, it is fine to obtain high tensile high density by temperature dry 24-36 h under conditions of being 60-70 DEG C
Plate is tieed up, by the sheets thus obtained equilibrium water conten that is placed in constant-temperature constant-humidity environment with spare.
A kind of high tensile high density fiberboard as made from made as described above method, the fiberboard is by nanofiber
Element is constituted, and the diameter of the nano-cellulose is 20 nm or so；The density of the fiberboard is 1.33-1.42 g/cm3.When plate
When average thickness is 2.3-2.4 mm, the tensile strength of plate is 36.73-45.62 MPa, and elasticity modulus is 1.93-3.87 GPa,
Work to break is 24.54-54.91 kJ/m2。
Compared with prior art, the present invention have it is following the utility model has the advantages that
(1) it is two sections of enzymatic treatments and the mechanical method combined that the present invention, which prepares nano-cellulose method, belongs to green energy conservation ring
Protect preparation process.
(2) high tensile high density fiberboard disclosed by the invention is environmentally protective, light weight and degradable, is based on this
A little characteristics are with a wide range of applications in aerospace, building decoration, communications and transportation etc. using ultra light composite field；
And it needs to consume big work to break in fracture, and elasticity modulus is high, is expected to as a kind of novel light bullet resistant material.
Specific embodiment
Specific implementation of the invention is described in further detail below in conjunction with example, but embodiments of the present invention are not
It is limited to this.
The present invention is not particularly limited the type of lignocellulosic material used, source, below with softwood pulp
For.
Embodiment 1
(1) vegetable-fibre slurry is subjected to enzymolysis processing using restriction endonuclease, is first dissolved in enzyme (enzyme activity is 180 PFU/g)
In ionized water, enzymolysis liquid is obtained；Adjusting slurry concentration with enzymolysis liquid again is 2 wt%, and enzyme dosage is 50 g/kg(relative to over dry
Slurry), it is 5.5 in pH, temperature is 3 h of enzymatic treatment at 40 DEG C；
(2) by the pulp dilution after step (1) enzymatic hydrolysis to 1 wt%, mechanical lapping processing is carried out using ultra micron plant pulverizer,
Pressure is 0-20 MPa, is ground number 15 times；
(3) step (2) mechanical lapping treated slurry is subjected to enzymolysis processing using restriction endonuclease, treatment conditions and step (1)
It is identical；
(4) by the pulp dilution after step (3) enzymatic hydrolysis to 1 wt%, mechanical lapping processing is carried out using ultra micron plant pulverizer,
Pressure is 0-40 MPa, grinds number 50 times, obtains nano-cellulose, and the diameter of the nano-cellulose is 20 nm or so；
It (5) is 14 wt%, quantification of 0.52 g/cm by 257 g concentration2500 mesh of nano-cellulose filter cloth package be placed in
It in cold press, is carried out dehydrating under the pressure of 0-0.4 MPa, obtains wet base after dehydration completely；
(6) wet base cold pressing treatment is placed into 3 h, so that it is formed under the pressure of 0.4 MPa, wet base after molding is transferred to baking
It is 0.05 MPa in pressure in case, temperature dry 36 h under conditions of being 60 DEG C obtain high tensile high density fiberboard,
1.4 g/cm3 of density of the plate.By sheets thus obtained (23 DEG C, the 50% RH) equilibrium water conten that is placed in constant-temperature constant-humidity environment with spare.Inspection
The performance of drafting board, as the result is shown when the average thickness of plate is 2.3 mm, the tensile strength of plate is 42.04 MPa, elasticity modulus
For 3.23 GPa, work to break is 50.75 kJ/m2。
Embodiment 2
(1) vegetable-fibre slurry is subjected to enzymolysis processing using restriction endonuclease, is first dissolved in enzyme (enzyme activity is 180 PFU/g)
In ionized water, enzymolysis liquid is obtained；Adjusting slurry concentration with enzymolysis liquid again is 3 wt%, and enzyme dosage is 50 g/kg(relative to over dry
Slurry), it is 4.5 in pH, temperature is 4 h of enzymatic treatment at 50 DEG C；
(2) it by the pulp dilution after step (1) enzymatic hydrolysis to 1.5 wt%, is carried out at mechanical lapping using ultra micron plant pulverizer
Reason, pressure are 0-20 MPa, are ground number 25 times；
(3) step (2) mechanical lapping treated slurry is subjected to enzymolysis processing using restriction endonuclease, treatment conditions and step (1)
It is identical；
(4) it by the pulp dilution after step (3) enzymatic hydrolysis to 1.5 wt%, is carried out at mechanical lapping using ultra micron plant pulverizer
Reason, pressure are 0-40 MPa, grind number 40 times, obtain nano-cellulose, and the diameter of the nano-cellulose is 20 nm or so；
It (5) is 10 wt%, quantification of 0.39 g/cm by 360 g concentration2500 mesh of nano-cellulose filter cloth package be placed in
It in cold press, is carried out dehydrating under the pressure of 0-0.4 MPa, obtains wet base after dehydration completely；
(6) wet base cold pressing treatment is placed into 4 h, so that it is formed under the pressure of 0.4 MPa, wet base after molding is transferred to baking
It is 0.07 MPa in pressure in case, temperature dry 30 h under conditions of being 65 DEG C obtain high tensile high density fiberboard,
1.35 g/cm3 of density of the plate.By sheets thus obtained (23 DEG C, the 50% RH) equilibrium water conten that is placed in constant-temperature constant-humidity environment with spare.
The performance of detection plate, as the result is shown when the average thickness of plate is 2.4 mm, the tensile strength of plate is 36.87 MPa, springform
Amount is 2.85 GPa, and work to break is 26.66 kJ/m2。
Embodiment 3
(1) vegetable-fibre slurry is subjected to enzymolysis processing using restriction endonuclease, is first dissolved in enzyme (enzyme activity is 180 PFU/g)
In ionized water, enzymolysis liquid is obtained；Adjusting slurry concentration with enzymolysis liquid again is 4 wt%, and enzyme dosage is 50 g/kg(relative to over dry
Slurry), it is 5.5 in pH, temperature is 2 h of enzymatic treatment at 50 DEG C；
(2) by the pulp dilution after step (1) enzymatic hydrolysis to 2 wt%, mechanical lapping processing is carried out using ultra micron plant pulverizer,
Pressure is 0-20 MPa, is ground number 20 times；
(3) step (2) mechanical lapping treated slurry is subjected to enzymolysis processing using restriction endonuclease, treatment conditions and step (1)
It is identical；
(4) by the pulp dilution after step (3) enzymatic hydrolysis to 2 wt%, mechanical lapping processing is carried out using ultra micron plant pulverizer,
Pressure is 0-40 MPa, grinds number 45 times, obtains nano-cellulose, and the diameter of the nano-cellulose is 20 nm or so；
It (5) is 12 wt%, quantification of 0.39 g/cm by 300 g concentration2500 mesh of nano-cellulose filter cloth package be placed in
It in cold press, is carried out dehydrating under the pressure of 0-0.4 MPa, obtains wet base after dehydration completely；
(6) wet base cold pressing treatment is placed into 6 h, so that it is formed under the pressure of 0.4 MPa, wet base after molding is transferred to baking
It is 0.08 MPa in pressure in case, temperature dry 24 h under conditions of being 70 DEG C obtain high tensile high density fiberboard,
1.33 g/cm3 of density of the plate.By sheets thus obtained (23 DEG C, the 50% RH) equilibrium water conten that is placed in constant-temperature constant-humidity environment with spare.
The performance of detection plate, as the result is shown when the average thickness of plate is 2.4 mm, the tensile strength of plate is 36.73 MPa, springform
Amount is 1.93 GPa, and work to break is 24.54 kJ/m2。
Embodiment 4
(1) vegetable-fibre slurry is subjected to enzymolysis processing using restriction endonuclease, is first dissolved in enzyme (enzyme activity is 180 PFU/g)
In ionized water, enzymolysis liquid is obtained；Adjusting slurry concentration with enzymolysis liquid again is 5 wt%, and enzyme dosage is 50 g/kg(relative to over dry
Slurry), it is 4.5 in pH, temperature is 5 h of enzymatic treatment at 35 DEG C；
(2) it by the pulp dilution after step (1) enzymatic hydrolysis to 1.5 wt%, is carried out at mechanical lapping using ultra micron plant pulverizer
Reason, pressure are 0-20 MPa, are ground number 15 times；
(3) step (2) mechanical lapping treated slurry is subjected to enzymolysis processing using restriction endonuclease, treatment conditions and step (1)
It is identical；
(4) it by the pulp dilution after step (3) enzymatic hydrolysis to 1.5 wt%, is carried out at mechanical lapping using ultra micron plant pulverizer
Reason, pressure are 0-40 MPa, grind number 50 times, obtain nano-cellulose, and the diameter of the nano-cellulose is 20 nm or so；
It (5) is 11 wt%, quantification of 0.65 g/cm by 327 g concentration2500 mesh of nano-cellulose filter cloth package be placed in
It in cold press, is carried out dehydrating under the pressure of 0-0.4 MPa, obtains wet base after dehydration completely；
(6) wet base cold pressing treatment is placed into 5 h, so that it is formed under the pressure of 0.4 MPa, wet base after molding is transferred to baking
It is 0.1 MPa in pressure in case, temperature dry 30 h under conditions of being 65 DEG C obtain high tensile high density fiberboard,
1.42 g/cm3 of density of the plate.By sheets thus obtained (23 DEG C, the 50% RH) equilibrium water conten that is placed in constant-temperature constant-humidity environment with spare.
The performance of detection plate, as the result is shown when the average thickness of plate is 2.3 mm, the tensile strength of plate is 45.62 MPa, springform
Amount is 3.87 GPa, and work to break is 54.91 kJ/m2。
Embodiment 5
(1) vegetable-fibre slurry is subjected to enzymolysis processing using restriction endonuclease, is first dissolved in enzyme (enzyme activity is 180 PFU/g)
In ionized water, enzymolysis liquid is obtained；Adjusting slurry concentration with enzymolysis liquid again is 1 wt%, and enzyme dosage is 50 g/kg(relative to over dry
Slurry), it is 6 in pH, temperature is 5 h of enzymatic treatment at 60 DEG C；
(2) by the pulp dilution after step (1) enzymatic hydrolysis to 1 wt%, mechanical lapping processing is carried out using ultra micron plant pulverizer,
Pressure is 0-20 MPa, is ground number 20 times；
(3) step (2) mechanical lapping treated slurry is subjected to enzymolysis processing using restriction endonuclease, treatment conditions and step (1)
It is identical；
(4) by the pulp dilution after step (3) enzymatic hydrolysis to 1 wt%, mechanical lapping processing is carried out using ultra micron plant pulverizer,
Pressure is 0-40 MPa, grinds number 45 times, obtains nano-cellulose, and the diameter of the nano-cellulose is 20 nm or so；
It (5) is 13 wt%, quantification of 0.39 g/cm by 276 g concentration2500 mesh of nano-cellulose filter cloth package be placed in
It in cold press, is carried out dehydrating under the pressure of 0-0.4 MPa, obtains wet base after dehydration completely；
(6) wet base cold pressing treatment is placed into 3 h, so that it is formed under the pressure of 0.4 MPa, wet base after molding is transferred to baking
It is 0.07 MPa in pressure in case, temperature dry 36 h under conditions of being 60 DEG C obtain high tensile high density fiberboard,
1.37 g/cm3 of density of the plate.By sheets thus obtained (23 DEG C, the 50% RH) equilibrium water conten that is placed in constant-temperature constant-humidity environment with spare.
The performance of detection plate, as the result is shown when the average thickness of plate is 2.3 mm, the tensile strength of plate is 37.68 MPa, springform
Amount is 2.19 GPa, and work to break is 31.42 kJ/m2。
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by the embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications done without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (10)
1. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard, which comprises the following steps:
(1) vegetable-fibre slurry is subjected to enzymolysis processing；
(2) slurry after step (1) enzymatic hydrolysis is subjected to mechanical lapping processing；
(3) step (2) mechanical lapping treated slurry is subjected to enzymolysis processing；
(4) slurry after step (3) enzymatic hydrolysis mechanical lapping is carried out to handle to obtain nano-cellulose；
(5) package of nano-cellulose filter cloth obtained by step (4) is placed in cold press and is carried out dehydrating to obtain wet base；
(6) wet base cold pressing treatment obtained by step (5) is placed, wet base is made to be formed, wet base is subjected to hot-pressing drying after molding, is made
High tensile high density fiberboard.
2. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist
In in step (1) (3), slurry concentration is 1-5 wt% when the enzymolysis processing, and pH when enzymolysis processing is 4.5-6, and temperature is
35-60 DEG C, the time is 2-5 h；The enzyme of the enzymatic hydrolysis is the enzyme that fibre structure can be made loose.
3. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, which is characterized in that
The enzyme of the enzymatic hydrolysis is cellulose complex enzyme, mashing enzyme or restriction endonuclease.
4. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist
In in step (2) (4), slurry concentration is 1-2 wt% when the mechanical lapping is handled.
5. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist
In in step (2), when the mechanical lapping is handled, pressure is 0-20 MPa, is ground number 15-25 times.
6. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist
In in step (4), when the mechanical lapping is handled, pressure is 0-40 MPa, is ground number 40-50 times.
7. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist
In in step (5), the concentration of the nano-cellulose is 10-14 wt%, quantification of 0.39-0.65 g/cm2。
8. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist
In in step (5), the mesh number of the filter cloth is 400-600 mesh；The pressure of the dehydration is 0-0.4 MPa.
9. a kind of environment-friendly preparation method thereof of high tensile high density fiberboard according to claim 1, feature exist
In in step (6), the pressure of the sizing is 0-0.4 MPa, and the time is 3-6 h.
10. a kind of high tensile high density fiberboard as made from the described in any item preparation methods of claim 1-9.
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| CN113183536A (en) * | 2021-05-24 | 2021-07-30 | 潍坊汇胜绝缘技术有限公司 | Preparation method of insulating paperboard |
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Application publication date: 20191203 |