CN102658578A - 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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- CN102658578A CN102658578A CN201210142388XA CN201210142388A CN102658578A CN 102658578 A CN102658578 A CN 102658578A CN 201210142388X A CN201210142388X A CN 201210142388XA CN 201210142388 A CN201210142388 A CN 201210142388A CN 102658578 A CN102658578 A CN 102658578A
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- laccase
- lignosulphonates
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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 made the method for fiberboard, mainly are applicable to the manufacturing of fiberboard.
Background technology
Not using adhesive to utilize the laccase treatment method to make wood-based plate is a kind of brand-new route of producing formaldehydeless environment friendly artificial board." enzyme activation treatment conditions and to the pre-test of pine fiber gummed Effect on Performance " (" forest-science " the 40th the 4th phase of volume); Reported the utility theory research that laccase is made fiberboard; The time of this method laccase treatment is long; Also need to regulate with cushioning liquid the pH value of laccase reactions system, applicant of the present invention is being that raw material is studied in the laccase treatment dry method bamboo shaving plate process for making and found with the bamboo shaving, the active oxygen number of free radical that produces when 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 active oxygen number of free radical is higher, and the physical and mechanical property of sheet material better.
Summary of the invention
The technical problem that the present invention will solve is: the problem to above-mentioned existence provides a kind of laccase activation lignosulphonates to make the method for fiberboard; Can improve the concentration of active oxygen free radical greatly; Improve the sheet material physical and mechanical property, the preparation of its adhesive simultaneously needn't be reserved enzyme processing time specially, and can not need the conditioned reaction system pH; To simplify production technology, improve work efficiency.
The technical scheme that the present invention adopted is: laccase activation lignosulphonates are made the method for fiberboard, it is characterized in that step is following:
A, timber or its processing residue material is separated into wood-fibred and carries out drying, the control moisture content is 3-5%;
B, talcum powder is mixed with laccase and mixes thoroughly, add the lignosulphonates mixing and stirring again, add water at last and stir and obtain the laccase adhesive;
C, the adhesive that utilizes step b to obtain stir while spraying wood-fibred in mixer, and binder dosage calculates in the 8-13% ratio that its solids content accounts for wood-fibred over dry quality;
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 proportioning raw materials of the said adhesive of preparation does among the step b,
The lignosulphonates of 20-25 weight portion;
Add the laccase of 40-55 enzyme activity unit in every grammes per square metre lignosulphonates over dry powder;
The talcum powder of lignosulphonates opaque amount 0.5%-1%;
The water of 145-200 weight portion.
Said laccase is dry laccase powder or laccase liquid, and wherein the weight of laccase liquid counts in the consumption of water.
Said talcous granularity is the 1000-3000 order.
Said 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 the laccase priming reaction in binder materials; Under the identical situation of other treatment conditions; Improved the concentration (its active oxygen number of free radical is than not adopting all high 1-5 of talcous reaction system doubly) of active oxygen free radical greatly; Thereby improved the physical and mechanical property of sheet material; Even do not use buffer solution to come conditioned reaction system pH, the unspecial in addition enzyme processing time of reserving, the vegetable fibre board intensity that the gained adhesive is processed can reach the GB requirement equally; In addition,, not only provide cost savings, and simplified production technology greatly, improved work efficiency owing to saved buffer solution consumption and enzyme processing time.
The specific embodiment
Embodiment 1: the method that present embodiment laccase activation lignosulphonates are made fiberboard may further comprise the steps,
A, get the raw materials ready:
With timber or its processing residue material, separate into wood-fibred and carry out drying by the medium density fiber plate producing process of routine, control wood-fibred moisture content is 3%;
Laccase, purchase moisture enzyme preparation from letter (China) Investment Co., Ltd of Novi---laccase NS51003;
Ammonium lignin sulfonate, chemical industry Co., Ltd buys from East China, Wuhan, is powder;
Talcum powder, buying granularity from the chemical industry shop is 1000 purpose talcum powder.
The metering of b, laccase binder materials: the consumption of laccase is that to need 40 enzyme activity units (u), amount of talc be ammonium lignin sulfonate and the water of 145 weight portions of 0.5%, 20 weight portion of ammonium lignin sulfonate opaque amount to the ammonium lignin sulfonate powder of every gram (g) over dry.During preparation laccase adhesive, the consumption with ammonium lignin sulfonate is a radix earlier, extrapolates the sum that needs with enzyme activity unit (u) by its over dry quality 40u/g, calculates the consumption of laccase again according to laccase activity; Amount of talc is 0.5% of an ammonium lignin sulfonate opaque amount; Last by weight than the consumption of confirming water, because laccase is a laccase liquid in this example, so the consumption of water should comprise the weight of laccase liquid, and water should be decided adding in the proportion by 145 weight portions at last.Laccase activity is measured can adopt ABTS---spectrophotometer method; The substrate that uses is 2; 2 '-azine-two-(3-ethyl benzothiazole-6-sulfonic acid) abbreviation ABTS; An enzyme unit alive (u) refers under certain reaction condition that per minute (min) catalysis 1 μ mol ABTS is converted into the required enzyme amount of product.
The preparation of c, laccase adhesive: take by weighing each raw material according to said ratio, earlier talcum powder is mixed with laccase liquid, the thing that stirs into a paste mixes this pastel and stirs with ammonium lignin sulfonate, adds the entry stirring at last and spares and all get final product.
D, laccase adhesive mix with wood-fibred: the adhesive that utilizes step c to obtain, in mixer, wood-fibred is stirred while spraying, and binder dosage calculates in 8% ratio that its solids content accounts for wood-fibred over dry quality.
The compacting of e, laccase treatment fiberboard: with steps d obtain the fiber plate with conventional operation promptly through mat 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 present embodiment laccase activation lignosulphonates are made fiberboard may further comprise the steps,
A, get the raw materials ready:
With timber or its processing residue material, separate into wood-fibred and carry out drying by the medium density fiber plate producing process of routine, control wood-fibred moisture content is 5%;
Laccase, purchase moisture enzyme preparation from letter (China) Investment Co., Ltd of Novi---laccase NS51003;
Ammonium lignin sulfonate, chemical industry Co., Ltd buys from East China, Wuhan, is powder;
Talcum powder, buying granularity from the chemical industry shop is 3000 purpose talcum powder.
The metering of b, laccase binder materials: the consumption of laccase is that to need 55 enzyme activity units (u), amount of talc be ammonium lignin sulfonate and the water of 200 weight portions of 1%, 25 weight portion of ammonium lignin sulfonate opaque amount to the ammonium lignin sulfonate powder of every gram (g) over dry.During preparation laccase adhesive, the consumption with ammonium lignin sulfonate is a radix earlier, extrapolates the sum that needs with enzyme activity unit (u) by its over dry quality 55u/g, calculates the consumption of laccase again according to laccase activity; Amount of talc is 1% of an ammonium lignin sulfonate opaque amount; Last by weight than the consumption of confirming water, because laccase is a laccase liquid in this example, so the consumption of water should comprise the weight of laccase liquid, and water should be decided adding in the proportion by 200 weight portions at last.Laccase activity is measured can adopt ABTS---spectrophotometer method; The substrate that uses is 2; 2 '-azine-two-(3-ethyl benzothiazole-6-sulfonic acid) abbreviation ABTS; An enzyme unit alive (u) refers under certain reaction condition that per minute (min) catalysis 1 μ mol ABTS is converted into the required enzyme amount of product.
The preparation of c, laccase adhesive: take by weighing each raw material according to said ratio, earlier talcum powder is mixed with laccase liquid, the thing that stirs into a paste mixes this pastel and stirs with ammonium lignin sulfonate, adds the entry stirring at last and spares and all get final product.
D, laccase adhesive mix with wood-fibred: the adhesive that utilizes step c to obtain, in mixer, wood-fibred is stirred while spraying, and binder dosage calculates in 13% ratio that its solids content accounts for wood-fibred over dry quality.
The compacting of e, laccase treatment fiberboard: with steps d obtain the fiber plate with conventional operation promptly through mat 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 present embodiment laccase activation lignosulphonates are made fiberboard may further comprise the steps,
A, get the raw materials ready:
With timber or its processing residue material, separate into wood-fibred and carry out drying by the medium density fiber plate producing process of routine, control wood-fibred moisture content is 4%;
Laccase, purchase moisture enzyme preparation from letter (China) Investment Co., Ltd of Novi---laccase NS51003;
Ammonium lignin sulfonate, chemical industry Co., Ltd buys from East China, Wuhan, is powder;
Talcum powder, buying granularity from the chemical industry shop is 2000 purpose talcum powder.
The metering of b, laccase binder materials: the consumption of laccase is that the ammonium lignin sulfonate powder of every gram (g) over dry needs 50 enzyme activity units (u); Amount of talc is ammonium lignin sulfonate and the water of 170 weight portions of 0.75%, 22.5 weight portion of ammonium lignin sulfonate opaque amount.During preparation laccase adhesive, the consumption with ammonium lignin sulfonate is a radix earlier, extrapolates the sum that needs with enzyme activity unit (u) by its over dry quality 50u/g, calculates the consumption of laccase again according to laccase activity; Amount of talc is 0.75% of an ammonium lignin sulfonate opaque amount; Last by weight than the consumption of confirming water, because laccase is a laccase liquid in this example, so the consumption of water should comprise the weight of laccase liquid, and water should be decided adding in the proportion by 170 weight portions at last.Laccase activity is measured can adopt ABTS---spectrophotometer method; The substrate that uses is 2; 2 '-azine-two-(3-ethyl benzothiazole-6-sulfonic acid) abbreviation ABTS; An enzyme unit alive (u) refers under certain reaction condition that per minute (min) catalysis 1 μ mol ABTS is converted into the required enzyme amount of product.
The preparation of c, laccase adhesive: take by weighing each raw material according to said ratio, earlier talcum powder is mixed with laccase liquid, the thing that stirs into a paste mixes this pastel and stirs with ammonium lignin sulfonate, adds the entry stirring at last and spares and all get final product.
D, laccase adhesive mix with wood-fibred: the adhesive that utilizes step c to obtain, in mixer, wood-fibred is stirred while spraying, and binder dosage calculates in 11% ratio that its solids content accounts for wood-fibred over dry quality.
The compacting of e, laccase treatment fiberboard: with steps d obtain the fiber plate with conventional operation promptly through mat 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 present embodiment laccase activation lignosulphonates are made fiberboard may further comprise the steps,
A, get the raw materials ready:
With timber or its processing residue material, separate into wood-fibred and carry out drying by the medium density fiber plate producing process of routine, control wood-fibred moisture content is 4%;
Laccase, purchase moisture enzyme preparation from letter (China) Investment Co., Ltd of Novi---laccase NS51003;
Sodium lignosulfonate, chemical industry Co., Ltd buys from East China, Wuhan, is powder;
Talcum powder, buying granularity from the chemical industry shop is 2000 purpose talcum powder.
The metering of b, laccase binder materials: the consumption of laccase is that to need 45 enzyme activity units (u), amount of talc be sodium lignosulfonate and the water of 180 weight portions of 0.8%, 22 weight portion of sodium lignosulfonate opaque amount to the sodium lignosulfonate powder of every gram (g) over dry.During preparation laccase adhesive, the consumption with sodium lignosulfonate is a radix earlier, extrapolates the sum that needs with enzyme activity unit (u) by its over dry quality 45u/g, calculates the consumption of laccase again according to laccase activity; Amount of talc is 0.8% of a sodium lignosulfonate opaque amount; Last by weight than the consumption of confirming water, because laccase is a laccase liquid in this example, so the consumption of water should comprise the weight of laccase liquid, and water should be decided adding in the proportion by 180 weight portions at last.Laccase activity is measured can adopt ABTS---spectrophotometer method; The substrate that uses is 2; 2 '-azine-two-(3-ethyl benzothiazole-6-sulfonic acid) abbreviation ABTS; An enzyme unit alive (u) refers under certain reaction condition that per minute (min) catalysis 1 μ mol ABTS is converted into the required enzyme amount of product.
The preparation of c, laccase adhesive: take by weighing each raw material according to said ratio, earlier talcum powder is mixed with laccase liquid, the thing that stirs into a paste mixes this pastel and stirs with sodium lignosulfonate, adds the entry stirring at last and spares and all get final product.
D, laccase adhesive mix with wood-fibred: the adhesive that utilizes step c to obtain, in mixer, wood-fibred is stirred while spraying, and binder dosage calculates in 10% ratio that its solids content accounts for wood-fibred over dry quality.
The compacting of e, laccase treatment fiberboard: with steps d obtain the fiber plate with conventional operation promptly through mat 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 present embodiment laccase activation lignosulphonates are made fiberboard may further comprise the steps,
A, get the raw materials ready:
With timber or its processing residue material, separate into wood-fibred and carry out drying by the medium density fiber plate producing process of routine, control wood-fibred moisture content is 3%;
Laccase, purchase moisture enzyme preparation from letter (China) Investment Co., Ltd of Novi---laccase NS51003;
Sodium lignosulfonate, chemical industry Co., Ltd buys from East China, Wuhan, is powder;
Talcum powder, buying granularity from the chemical industry shop is 3000 purpose talcum powder.
The metering of b, laccase binder materials: the consumption of laccase is that to need 40 enzyme activity units (u), amount of talc be sodium lignosulfonate and the water of 145 weight portions of 0.8%, 20 weight portion of sodium lignosulfonate opaque amount to the sodium lignosulfonate powder of every gram (g) over dry.During preparation laccase adhesive, the consumption with sodium lignosulfonate is a radix earlier, extrapolates the sum that needs with enzyme activity unit (u) by its over dry quality 40u/g, calculates the consumption of laccase again according to laccase activity; Amount of talc is 0.8% of a sodium lignosulfonate opaque amount; Last by weight than the consumption of confirming water, because laccase is a laccase liquid in this example, so the consumption of water should comprise the weight of laccase liquid, and water should be decided adding in the proportion by 145 weight portions at last.Laccase activity is measured can adopt ABTS---spectrophotometer method; The substrate that uses is 2; 2 '-azine-two-(3-ethyl benzothiazole-6-sulfonic acid) abbreviation ABTS; An enzyme unit alive (u) refers under certain reaction condition that per minute (min) catalysis 1 μ mol ABTS is converted into the required enzyme amount of product.
The preparation of c, laccase adhesive: take by weighing each raw material according to said ratio, earlier talcum powder is mixed with laccase liquid, the thing that stirs into a paste mixes this pastel and stirs with sodium lignosulfonate, adds the entry stirring at last and spares and all get final product.
D, laccase adhesive mix with wood-fibred: the adhesive that utilizes step c to obtain, in mixer, wood-fibred is stirred while spraying, and binder dosage calculates in 9% ratio that its solids content accounts for wood-fibred over dry quality.
The compacting of e, laccase treatment fiberboard: with steps d obtain the fiber plate with conventional operation promptly through mat 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 above-mentioned each embodiment can also select for use letter (China) Investment Co., Ltd of Novi to produce, because itself is not moisture, so its consumption is disregarded in the consumption of entry.
In order further to improve the activation effect of laccase; Can, aforementioned five embodiment add sodium hydrogen phosphate-citrate buffer solution in preparing the raw material of adhesive; Its consumption must guarantee the pH value of conditioned reaction system to 3.5-4.5, and in the consumption of the accrued entry of liquid measure of this buffer solution.
The present invention is used for the reaction system of laccase activation lignosulphonates with talcum powder, and under the identical situation of other treatment conditions, 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 do not add the ROS horizontal tabulate 1 that talcum powder processing timber produces:
(table 1)
Visible by table 1; Different enzyme dosages have appreciable impact to the ROS number of free radical; When enzyme dosage is the every gram over dry of 40u lignosulphonates quality; The ROS number of free radical reaches peak value, and when talcous addition was lignosulphonates over dry quality 0.8%, the ROS number of free radical was than not adding talcous high 1-5 doubly.Just because of this, preparation is during adhesive, even without the pH value of buffer solution conditioned reaction system; Do not heat, do not reserve the reaction time; Though the very inabundant worry of effect of enzyme is arranged, still can reach corresponding GB requirement with the wood-based plate intensity of this adhesive production, this is difficult to reckon with.
Claims (5)
1. laccase activation lignosulphonates are made the method for fiberboard, it is characterized in that step is following:
A, timber or its processing residue material is separated into wood-fibred and carries out drying, the control moisture content is 3-5%;
B, talcum powder is mixed with laccase and mixes thoroughly, add the lignosulphonates mixing and stirring again, add water at last and stir and obtain the laccase adhesive;
C, the adhesive that utilizes step b to obtain stir while spraying wood-fibred in mixer, and binder dosage calculates in the 8-13% ratio that its solids content accounts for wood-fibred over dry quality;
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.
2. laccase activation lignosulphonates according to claim 1 are made the method for fiberboard, it is characterized in that: each proportioning raw materials of the said adhesive of preparation does among the step b,
The lignosulphonates of 20-25 weight portion;
Add the laccase of 40-55 enzyme activity unit in every grammes per square metre lignosulphonates over dry powder;
The talcum powder of lignosulphonates opaque amount 0.5%-1%;
The water of 145-200 weight portion.
3. laccase activation lignosulphonates according to claim 2 are made the method for fiberboard, it is characterized in that: said laccase is dry laccase powder or laccase liquid, and wherein the weight of laccase liquid counts in the consumption of water.
4. according to the method for claim 1 or 2 or 3 described laccase activation lignosulphonates manufacturing fiberboards, it is characterized in that: said talcous granularity is the 1000-3000 order.
5. according to the method for claim 1 or 2 or 3 described laccase activation lignosulphonates manufacturing fiberboards, it is characterized in that: said lignosulphonates are ammonium lignin sulfonate or sodium lignosulfonate.
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Cited By (4)
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| CN103192441A (en) * | 2013-04-19 | 2013-07-10 | 琚长林 | Plant fiber composite fireproof plate |
| CN103203791A (en) * | 2013-04-24 | 2013-07-17 | 琚长林 | Novel environment-friendly plant fiber home door |
| CN105583935A (en) * | 2016-01-12 | 2016-05-18 | 东北林业大学 | Method for preparing environment-friendly fiberboard on basis of chitosan blended lignin |
| CN117047886A (en) * | 2023-07-24 | 2023-11-14 | 广西科学院 | Method for preparing non-adhesive fiber board through microwave hot pressing |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103192441A (en) * | 2013-04-19 | 2013-07-10 | 琚长林 | Plant fiber composite fireproof plate |
| CN103203791A (en) * | 2013-04-24 | 2013-07-17 | 琚长林 | Novel environment-friendly plant fiber home door |
| CN103203791B (en) * | 2013-04-24 | 2015-09-09 | 琚长林 | A kind of string house ornamentation door |
| CN105583935A (en) * | 2016-01-12 | 2016-05-18 | 东北林业大学 | Method for preparing environment-friendly fiberboard on basis of chitosan blended lignin |
| 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 |
| CN117047886A (en) * | 2023-07-24 | 2023-11-14 | 广西科学院 | Method for preparing non-adhesive fiber board through microwave hot pressing |
| 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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| CN102658578B (en) | 2014-07-23 |
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Effective date of registration: 20210526 Address after: Room 1011, 4 / F, building 5, No. 299, Hangfu Road, Chongfu Town, Tongxiang City, Jiaxing City, Zhejiang Province Patentee after: Tongxiang Beite Technology Co.,Ltd. Address before: 311300 College of engineering, Zhejiang agriculture and Forestry University, 88 Huancheng North Road, Lin'an City, Hangzhou City, Zhejiang Province Patentee before: ZHEJIANG A & F University |
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