CN102658578B - Method for manufacturing fiberboard by using laccase-activated lignosulfonate - Google Patents
Method for manufacturing fiberboard by using laccase-activated lignosulfonate Download PDFInfo
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- CN102658578B CN102658578B CN201210142388.XA CN201210142388A CN102658578B CN 102658578 B CN102658578 B CN 102658578B CN 201210142388 A CN201210142388 A CN 201210142388A CN 102658578 B CN102658578 B CN 102658578B
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- laccase
- lignosulphonates
- fiberboard
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- 108010029541 Laccase Proteins 0.000 title claims abstract description 114
- 229920001732 Lignosulfonate Polymers 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000011094 fiberboard Substances 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title abstract description 10
- 239000000853 adhesive Substances 0.000 claims abstract description 34
- 230000001070 adhesive effect Effects 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000007731 hot pressing Methods 0.000 claims abstract description 29
- 238000003756 stirring Methods 0.000 claims abstract description 26
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 108090000790 Enzymes Proteins 0.000 claims description 30
- 102000004190 Enzymes Human genes 0.000 claims description 30
- 239000004117 Lignosulphonate Substances 0.000 claims description 25
- 235000019357 lignosulphonate Nutrition 0.000 claims description 25
- 230000000694 effects Effects 0.000 claims description 24
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 21
- 230000004913 activation Effects 0.000 claims description 16
- 229920005552 sodium lignosulfonate Polymers 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- 239000011230 binding agent Substances 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 238000012805 post-processing Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 239000002023 wood Substances 0.000 abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 229920002522 Wood fibre Polymers 0.000 abstract 2
- 239000002025 wood fiber Substances 0.000 abstract 2
- 238000001035 drying Methods 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 14
- 238000002360 preparation method Methods 0.000 description 11
- OHDRQQURAXLVGJ-HLVWOLMTSA-N azane;(2e)-3-ethyl-2-[(e)-(3-ethyl-6-sulfo-1,3-benzothiazol-2-ylidene)hydrazinylidene]-1,3-benzothiazole-6-sulfonic acid Chemical compound [NH4+].[NH4+].S/1C2=CC(S([O-])(=O)=O)=CC=C2N(CC)C\1=N/N=C1/SC2=CC(S([O-])(=O)=O)=CC=C2N1CC OHDRQQURAXLVGJ-HLVWOLMTSA-N 0.000 description 10
- 239000000454 talc Substances 0.000 description 10
- 229910052623 talc Inorganic materials 0.000 description 10
- 235000012222 talc Nutrition 0.000 description 10
- 150000003254 radicals Chemical class 0.000 description 9
- 238000006555 catalytic reaction Methods 0.000 description 5
- 230000013011 mating Effects 0.000 description 5
- 239000003642 reactive oxygen metabolite Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 239000007853 buffer solution Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007981 phosphate-citrate buffer Substances 0.000 description 1
- 238000009700 powder processing Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- FYKDNWHPKQOZOT-UHFFFAOYSA-M sodium;dihydrogen phosphate;2-hydroxypropane-1,2,3-tricarboxylic acid Chemical compound [Na+].OP(O)([O-])=O.OC(=O)CC(O)(C(O)=O)CC(O)=O FYKDNWHPKQOZOT-UHFFFAOYSA-M 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Landscapes
- Adhesives Or Adhesive Processes (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention relates to a method for manufacturing a fiberboard by using laccase-activated lignosulfonate. By the method for manufacturing the fiberboard by using the laccase-activated lignosulfonate, the concentration of active oxygen free radicals can be greatly improved, and the physical and mechanical properties of the board are improved. According to the technical scheme, the method for manufacturing the fiberboard by using the laccase-activated lignosulfonate is characterized by comprising the following steps of: (a) separating wood or residual materials obtained by processing the wood into wood fibers, and drying; (b) mixing talcpowder and laccase, uniformly stirring, adding lignosulfonate, mixing, uniformly stirring, adding water and uniformly stirring to obtain a laccase adhesive; (c) spraying the adhesive obtained in the step (b) on the wood fibers in a stirring machine with stirring; and (d) paving a fiberboard material obtained in the step (c), prepressing, performing hot pressing, and performing aftertreatment. The method is suitable for manufacturing the fiberboard.
Description
Technical field
The present invention relates to the processing of a kind of timber or non-wood plant, particularly a kind of laccase activation lignosulphonates are manufactured the method for fiberboard, are mainly applicable to the manufacture of fiberboard.
Background technology
Not using adhesive to utilize laccase treatment method to manufacture wood-based plate is a kind of brand-new route of producing formaldehydeless environment friendly artificial board." enzyme activation treatment conditions and the pre-test that affects on pine fiber glue performance thereof " (the 40th the 4th phase of volume of < < forest-science > >), reported the utility theory research that laccase is manufactured fiberboard, the time of the method laccase treatment is long, also need to regulate with cushioning liquid the pH value of laccase reactions system, the present patent application people finds take bamboo shaving in raw material research laccase treatment dry method bamboo shaving plate process for making, the reactive oxygen species free radicals concentration producing during the physical and mechanical property of laccase treatment bamboo shaving panel products and laccase activation bamboo shaving (the Beijing Forestry University's journal that is closely related, the 31st volume, the 2nd phase), and its reactive oxygen species free radicals concentration is higher, the physical and mechanical property of sheet material better.
Summary of the invention
The technical problem to be solved in the present invention is: the problem for above-mentioned existence provides a kind of laccase activation lignosulphonates to manufacture the method for fiberboard, can greatly improve the concentration of reactive oxygen species free radicals, improve sheet material physical and mechanical property, the preparation of its adhesive simultaneously needn't be reserved enzyme processing time specially, and can not need to regulate pH value of reaction system, to simplify production technology, improve work efficiency.
The technical solution adopted in the present invention is: laccase activation lignosulphonates are manufactured the method for fiberboard, it is characterized in that step is as follows:
A, timber or its processing residue material is separated into wood-fibred and is dried, control moisture content is 3-5%;
B, talcum powder mixed with laccase and mix thoroughly, then adding lignosulphonates mixing and stirring, finally adding water and stir and obtain laccase adhesive;
C, the adhesive that utilizes step b to obtain stir injection limit, wood-fibred limit in mixer, and the 8-13% ratio that binder dosage accounts for wood-fibred over dry quality in its solids content is calculated;
D, the fiber plate that step c is obtained are mated formation, precompressed, hot pressing, post processing, precompressed linear pressure 1.5-2.5kN/cm, hot pressing temperature 170-200 ℃, hot pressing pressure 2.0-3.5MPa, squeeze time 10-30s, hot pressing time 30-60s/mm.
Each raw material proportioning of preparing described adhesive in step b is,
The lignosulphonates of 20-25 weight portion;
In every grammes per square metre lignosulphonates over dry powder, add the laccase of 40-55 enzyme activity unit;
The talcum powder of lignosulphonates opaque amount 0.5%-1%;
The water of 145-200 weight portion.
Described laccase is dry laccase powder or laccase liquid, and wherein the weight of laccase liquid counts in the consumption of water.
Described talcous granularity is 1000-3000 order.
Described lignosulphonates are ammonium lignin sulfonate or sodium lignosulfonate.
The invention has the beneficial effects as follows: the present invention adds talcum powder as the promoter in laccase priming reaction in binder materials, in the situation that other treatment conditions are identical, greatly improved the concentration (its reactive oxygen species free radicals concentration ratio does not adopt all high 1-5 times of talcous reaction system) of reactive oxygen species free radicals, thereby improved the physical and mechanical property of sheet material, even if do not regulate pH value of reaction system, do not reserve specially in addition enzyme processing time with buffer solution, the vegetable fibre board intensity that gained adhesive is made can reach GB requirement equally; In addition, owing to having saved buffer solution consumption and enzyme processing time, not only provide cost savings, and greatly simplified production technology, improved work efficiency.
The specific embodiment
Embodiment 1: the method that the present embodiment laccase activation lignosulphonates are manufactured fiberboard comprises the following steps,
A, get the raw materials ready:
By timber or its processing residue material, medium density fiber plate producing process is routinely separated into wood-fibred and is dried, and controlling wood-fibred moisture content is 3%;
Laccase, from letter (China) Investment Co., Ltd of Novi, purchase moisture enzyme preparation---laccase NS51003;
Ammonium lignin sulfonate, from East China, Wuhan, Chemical Co., Ltd. buys, and is powder;
Talcum powder, from chemical industry shop, buying granularity is 1000 object talcum powder.
The metering of b, laccase binder materials: the consumption of laccase is that the ammonium lignin sulfonate powder of every gram of (g) over dry needs 40 enzyme activity units (u), and amount of talc is the ammonium lignin sulfonate of 0.5%, 20 weight portion and the water of 145 weight portions of ammonium lignin sulfonate opaque amount.During preparation laccase adhesive, first consumption of take ammonium lignin sulfonate is radix, extrapolates the sum needing with enzyme activity unit (u) by its over dry quality 40u/g, then according to laccase activity, calculates the consumption of laccase; Amount of talc is 0.5% of ammonium lignin sulfonate opaque amount; The last consumption of determining by weight water, because laccase in this example is laccase liquid, so the consumption of water should comprise the weight of laccase liquid, and water should be finally by deciding and add in the proportion of 145 weight portions.Laccase activity is measured can adopt ABTS---spectrophotometer method, with substrate be 2,2 '-azine-bis--(3-ethyl benzothiazole-6-sulfonic acid) is called for short ABTS, Yi Gemeihuo unit (u) refers under certain reaction condition, and (min) per minute catalysis 1 μ mol ABTS is converted into the required enzyme amount of product.
The preparation of c, laccase adhesive: according to said ratio, take each raw material, first talcum powder is mixed with laccase liquid, the thing that stirs into a paste, then this pastel is mixed with ammonium lignin sulfonate and stir, finally add water to stir all even.
D, laccase adhesive mix with wood-fibred: the adhesive that utilizes step c to obtain, in mixer, injection limit, wood-fibred limit is stirred, and 8% ratio that binder dosage accounts for wood-fibred over dry quality in its solids content is calculated.
The compacting of e, laccase treatment fiberboard: by steps d obtain fiber plate by conventional operation through mating formation, precompressed, hot pressing, post processing, precompressed linear pressure 1.5kN/cm, 170 ℃ of hot pressing temperatures, hot pressing pressure 2.0MPa, squeeze time 10s, hot pressing time 30s/mm.
Embodiment 2: the method that the present embodiment laccase activation lignosulphonates are manufactured fiberboard comprises the following steps,
A, get the raw materials ready:
By timber or its processing residue material, medium density fiber plate producing process is routinely separated into wood-fibred and is dried, and controlling wood-fibred moisture content is 5%;
Laccase, from letter (China) Investment Co., Ltd of Novi, purchase moisture enzyme preparation---laccase NS51003;
Ammonium lignin sulfonate, from East China, Wuhan, Chemical Co., Ltd. buys, and is powder;
Talcum powder, from chemical industry shop, buying granularity is 3000 object talcum powder.
The metering of b, laccase binder materials: the consumption of laccase is that the ammonium lignin sulfonate powder of every gram of (g) over dry needs 55 enzyme activity units (u), and amount of talc is the ammonium lignin sulfonate of 1%, 25 weight portion and the water of 200 weight portions of ammonium lignin sulfonate opaque amount.During preparation laccase adhesive, first consumption of take ammonium lignin sulfonate is radix, extrapolates the sum needing with enzyme activity unit (u) by its over dry quality 55u/g, then according to laccase activity, calculates the consumption of laccase; Amount of talc is 1% of ammonium lignin sulfonate opaque amount; The last consumption of determining by weight water, because laccase in this example is laccase liquid, so the consumption of water should comprise the weight of laccase liquid, and water should be finally by deciding and add in the proportion of 200 weight portions.Laccase activity is measured can adopt ABTS---spectrophotometer method, with substrate be 2,2 '-azine-bis--(3-ethyl benzothiazole-6-sulfonic acid) is called for short ABTS, Yi Gemeihuo unit (u) refers under certain reaction condition, and (min) per minute catalysis 1 μ mol ABTS is converted into the required enzyme amount of product.
The preparation of c, laccase adhesive: according to said ratio, take each raw material, first talcum powder is mixed with laccase liquid, the thing that stirs into a paste, then this pastel is mixed with ammonium lignin sulfonate and stir, finally add water to stir all even.
D, laccase adhesive mix with wood-fibred: the adhesive that utilizes step c to obtain, in mixer, injection limit, wood-fibred limit is stirred, and 13% ratio that binder dosage accounts for wood-fibred over dry quality in its solids content is calculated.
The compacting of e, laccase treatment fiberboard: by steps d obtain fiber plate by conventional operation through mating formation, precompressed, hot pressing, post processing, precompressed linear pressure 2.5kN/cm, 200 ℃ of hot pressing temperatures, hot pressing pressure 3.5MPa, squeeze time 30s, hot pressing time 60s/mm.
Embodiment 3: the method that the present embodiment laccase activation lignosulphonates are manufactured fiberboard comprises the following steps,
A, get the raw materials ready:
By timber or its processing residue material, medium density fiber plate producing process is routinely separated into wood-fibred and is dried, and controlling wood-fibred moisture content is 4%;
Laccase, from letter (China) Investment Co., Ltd of Novi, purchase moisture enzyme preparation---laccase NS51003;
Ammonium lignin sulfonate, from East China, Wuhan, Chemical Co., Ltd. buys, and is powder;
Talcum powder, from chemical industry shop, buying granularity is 2000 object talcum powder.
The metering of b, laccase binder materials: the consumption of laccase is that the ammonium lignin sulfonate powder of every gram of (g) over dry needs 50 enzyme activity units (u), amount of talc is the ammonium lignin sulfonate of 0.75%, 22.5 weight portion and the water of 170 weight portions of ammonium lignin sulfonate opaque amount.During preparation laccase adhesive, first consumption of take ammonium lignin sulfonate is radix, extrapolates the sum needing with enzyme activity unit (u) by its over dry quality 50u/g, then according to laccase activity, calculates the consumption of laccase; Amount of talc is 0.75% of ammonium lignin sulfonate opaque amount; The last consumption of determining by weight water, because laccase in this example is laccase liquid, so the consumption of water should comprise the weight of laccase liquid, and water should be finally by deciding and add in the proportion of 170 weight portions.Laccase activity is measured can adopt ABTS---spectrophotometer method, with substrate be 2,2 '-azine-bis--(3-ethyl benzothiazole-6-sulfonic acid) is called for short ABTS, Yi Gemeihuo unit (u) refers under certain reaction condition, and (min) per minute catalysis 1 μ mol ABTS is converted into the required enzyme amount of product.
The preparation of c, laccase adhesive: according to said ratio, take each raw material, first talcum powder is mixed with laccase liquid, the thing that stirs into a paste, then this pastel is mixed with ammonium lignin sulfonate and stir, finally add water to stir all even.
D, laccase adhesive mix with wood-fibred: the adhesive that utilizes step c to obtain, in mixer, injection limit, wood-fibred limit is stirred, and 11% ratio that binder dosage accounts for wood-fibred over dry quality in its solids content is calculated.
The compacting of e, laccase treatment fiberboard: by steps d obtain fiber plate by conventional operation through mating formation, precompressed, hot pressing, post processing, precompressed linear pressure 2kN/cm, 185 ℃ of hot pressing temperatures, hot pressing pressure 3MPa, squeeze time 20s, hot pressing time 45s/mm.
Embodiment 4: the method that the present embodiment laccase activation lignosulphonates are manufactured fiberboard comprises the following steps,
A, get the raw materials ready:
By timber or its processing residue material, medium density fiber plate producing process is routinely separated into wood-fibred and is dried, and controlling wood-fibred moisture content is 4%;
Laccase, from letter (China) Investment Co., Ltd of Novi, purchase moisture enzyme preparation---laccase NS51003;
Sodium lignosulfonate, from East China, Wuhan, Chemical Co., Ltd. buys, and is powder;
Talcum powder, from chemical industry shop, buying granularity is 2000 object talcum powder.
The metering of b, laccase binder materials: the consumption of laccase is that the sodium lignosulfonate powder of every gram of (g) over dry needs 45 enzyme activity units (u), and amount of talc is the sodium lignosulfonate of 0.8%, 22 weight portion and the water of 180 weight portions of sodium lignosulfonate opaque amount.During preparation laccase adhesive, first consumption of take sodium lignosulfonate is radix, extrapolates the sum needing with enzyme activity unit (u) by its over dry quality 45u/g, then according to laccase activity, calculates the consumption of laccase; Amount of talc is 0.8% of sodium lignosulfonate opaque amount; The last consumption of determining by weight water, because laccase in this example is laccase liquid, so the consumption of water should comprise the weight of laccase liquid, and water should be finally by deciding and add in the proportion of 180 weight portions.Laccase activity is measured can adopt ABTS---spectrophotometer method, with substrate be 2,2 '-azine-bis--(3-ethyl benzothiazole-6-sulfonic acid) is called for short ABTS, Yi Gemeihuo unit (u) refers under certain reaction condition, and (min) per minute catalysis 1 μ mol ABTS is converted into the required enzyme amount of product.
The preparation of c, laccase adhesive: according to said ratio, take each raw material, first talcum powder is mixed with laccase liquid, the thing that stirs into a paste, then this pastel is mixed with sodium lignosulfonate and stir, finally add water to stir all even.
D, laccase adhesive mix with wood-fibred: the adhesive that utilizes step c to obtain, in mixer, injection limit, wood-fibred limit is stirred, and 10% ratio that binder dosage accounts for wood-fibred over dry quality in its solids content is calculated.
The compacting of e, laccase treatment fiberboard: by steps d obtain fiber plate by conventional operation through mating formation, precompressed, hot pressing, post processing, precompressed linear pressure 1.8kN/cm, 180 ℃ of hot pressing temperatures, hot pressing pressure 2.5MPa, squeeze time 20s, hot pressing time 40s/mm.
Embodiment 5: the method that the present embodiment laccase activation lignosulphonates are manufactured fiberboard comprises the following steps,
A, get the raw materials ready:
By timber or its processing residue material, medium density fiber plate producing process is routinely separated into wood-fibred and is dried, and controlling wood-fibred moisture content is 3%;
Laccase, from letter (China) Investment Co., Ltd of Novi, purchase moisture enzyme preparation---laccase NS51003;
Sodium lignosulfonate, from East China, Wuhan, Chemical Co., Ltd. buys, and is powder;
Talcum powder, from chemical industry shop, buying granularity is 3000 object talcum powder.
The metering of b, laccase binder materials: the consumption of laccase is that the sodium lignosulfonate powder of every gram of (g) over dry needs 40 enzyme activity units (u), and amount of talc is the sodium lignosulfonate of 0.8%, 20 weight portion and the water of 145 weight portions of sodium lignosulfonate opaque amount.During preparation laccase adhesive, first consumption of take sodium lignosulfonate is radix, extrapolates the sum needing with enzyme activity unit (u) by its over dry quality 40u/g, then according to laccase activity, calculates the consumption of laccase; Amount of talc is 0.8% of sodium lignosulfonate opaque amount; The last consumption of determining by weight water, because laccase in this example is laccase liquid, so the consumption of water should comprise the weight of laccase liquid, and water should be finally by deciding and add in the proportion of 145 weight portions.Laccase activity is measured can adopt ABTS---spectrophotometer method, with substrate be 2,2 '-azine-bis--(3-ethyl benzothiazole-6-sulfonic acid) is called for short ABTS, Yi Gemeihuo unit (u) refers under certain reaction condition, and (min) per minute catalysis 1 μ mol ABTS is converted into the required enzyme amount of product.
The preparation of c, laccase adhesive: according to said ratio, take each raw material, first talcum powder is mixed with laccase liquid, the thing that stirs into a paste, then this pastel is mixed with sodium lignosulfonate and stir, finally add water to stir all even.
D, laccase adhesive mix with wood-fibred: the adhesive that utilizes step c to obtain, in mixer, injection limit, wood-fibred limit is stirred, and 9% ratio that binder dosage accounts for wood-fibred over dry quality in its solids content is calculated.
The compacting of e, laccase treatment fiberboard: by steps d obtain fiber plate by conventional operation through mating formation, precompressed, hot pressing, post processing, precompressed linear pressure 1.5kN/cm, 170 ℃ of hot pressing temperatures, hot pressing pressure 2.0MPa, squeeze time 15s, hot pressing time 30s/mm.
The dry laccase powder that laccase described in the various embodiments described above can also select letter (China) Investment Co., Ltd of Novi to produce, because itself is not moisture, so its consumption is not counted in the consumption of water.
In order further to improve the activation effect of laccase, can in preparing the raw material of adhesive, aforementioned five embodiment add sodium hydrogen phosphate-citrate buffer solution, its consumption must guarantee to regulate the pH value of reaction system to 3.5-4.5, and the liquid measure of this buffer solution should count in the consumption of water.
The present invention is the reaction system for laccase activation lignosulphonates by talcum powder, and in the situation that other treatment conditions are identical, its active oxygen (ROS) number of free radical is than not adding the high 1-5 of talcous reaction system doubly.List different enzyme dosages below and add and the ROS horizontal tabulate 1 that does not add the generation of talcum powder processing timber:
(table 1)
From table 1, different enzyme dosages have remarkable impact to ROS number of free radical, when enzyme dosage is every gram of over dry lignosulphonates quality of 40u, ROS number of free radical reaches peak value, when talcous addition is lignosulphonates over dry quality 0.8%, ROS number of free radical is than not adding talcous high 1-5 doubly.Just because of this, while preparing adhesive, even if regulate the pH value of reaction system without buffer solution, do not heat, do not reserve the reaction time, though there is the very inabundant worry of effect of enzyme, by the wood-based plate intensity that this adhesive is produced, still can reach corresponding GB requirement, this is difficult to expect.
Claims (3)
1. laccase activation lignosulphonates are manufactured a method for fiberboard, it is characterized in that step is as follows:
A, timber or its processing residue material is separated into wood-fibred and is dried, control moisture content is 3-5%;
B, talcum powder mixed with laccase and mix thoroughly, then adding lignosulphonates mixing and stirring, finally adding water and stir and obtain laccase adhesive;
C, the adhesive that utilizes step b to obtain stir injection limit, wood-fibred limit in mixer, and the 8-13% ratio that binder dosage accounts for wood-fibred over dry quality in its solids content is calculated;
D, the fiber plate that step c is obtained are mated formation, precompressed, hot pressing, post processing, precompressed linear pressure 1.5-2.5kN/cm, hot pressing temperature 170-200 ℃, hot pressing pressure 2.0-3.5MPa, squeeze time 10-30 s, hot pressing time 30-60s/mm;
Each raw material proportioning of preparing described adhesive in step b is,
The lignosulphonates of 20-25 weight portion;
In every grammes per square metre lignosulphonates over dry powder, add the laccase of 40-55 enzyme activity unit;
The talcum powder of lignosulphonates opaque amount 0.5%-1%;
The water of 145-200 weight portion;
Described laccase is dry laccase powder or laccase liquid, and wherein the weight of laccase liquid counts in the consumption of water.
2. laccase activation lignosulphonates according to claim 1 are manufactured the method for fiberboard, it is characterized in that: described talcous granularity is 1000-3000 order.
3. laccase activation lignosulphonates according to claim 1 and 2 are manufactured the method for fiberboard, it is characterized in that: described lignosulphonates are ammonium lignin sulfonate or sodium lignosulfonate.
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| CN103192441B (en) * | 2013-04-19 | 2015-07-22 | 琚长林 | Plant fiber composite fireproof plate |
| CN103203791B (en) * | 2013-04-24 | 2015-09-09 | 琚长林 | A kind of string house ornamentation door |
| CN105583935B (en) * | 2016-01-12 | 2017-11-03 | 东北林业大学 | A kind of method that environment protecting fiber board is prepared based on chitosan blend lignin |
| CN117047886B (en) * | 2023-07-24 | 2024-05-03 | 广西科学院 | Method for preparing non-adhesive fiber board through microwave hot pressing |
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| US6287708B1 (en) * | 1997-01-14 | 2001-09-11 | Neste Chemicals Oy | Adhesive for fiber boards |
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| CN1250500A (en) * | 1997-01-14 | 2000-04-12 | 液体化学品公司 | Process for preparing fiber boards |
| US6245269B1 (en) * | 1997-01-14 | 2001-06-12 | Neste Chemicals Oy | Process for preparing fiber boards |
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| 《漆酶活化处理条件对竹材活性氧类自由基变化的影响》;金春德等;《林产工业》;20081231;第35卷(第6期);32-36 * |
| 《漆酶活化木素磺酸盐条件对胶合板强度的影响》;曹永建等;《林产工业》;20070430;第34卷(第2期);13-17 * |
| Environmental assessment of green hardboard production coupled with a laccaseactivated system;Sara González-García etal;《Journal of Cleaner Production》;20101119;445-453 * |
| Sara González-García etal.Environmental assessment of green hardboard production coupled with a laccaseactivated system.《Journal of Cleaner Production》.2010,445-453. |
| 曹永建等.《漆酶活化木素磺酸盐条件对胶合板强度的影响》.《林产工业》.2007,第34卷(第2期),13-17. |
| 金春德等.《漆酶活化处理条件对竹材活性氧类自由基变化的影响》.《林产工业》.2008,第35卷(第6期),第32-36页. |
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|---|---|
| CN102658578A (en) | 2012-09-12 |
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