CN106750367B - A kind of activation method of wood fibre - Google Patents
A kind of activation method of wood fibre Download PDFInfo
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- CN106750367B CN106750367B CN201611037699.4A CN201611037699A CN106750367B CN 106750367 B CN106750367 B CN 106750367B CN 201611037699 A CN201611037699 A CN 201611037699A CN 106750367 B CN106750367 B CN 106750367B
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- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
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Abstract
A kind of activation method of wood fibre, the present invention relates to a kind of activation methods.It is low that it will solve the problems, such as that the prior art carries out pretreatment reaction activity to wood fibre.Activation method: one, with alkaline-polyethylene glycol-amino-compound mixed aqueous solution；Two, the sprinkling processing of wood fibre；Three, freezing processing；Four, the control of moisture content.The present invention destroys the hydrogen bond of cellulose, hemicellulose in wood fibre using cryogenic freezing technology and so as to the swollen activation of alkali, polyethylene glycol and amino-compound, to achieve the purpose that activate wood fibre, more hydroxyls are enabled to participate in chemically reacting under the action of heat, to realize the Binderless binding under hot pressing between wood fibre.The present invention is suitable for a kind of activation method of wood fibre.
Description
Technical field
The present invention relates to a kind of activation methods.
Background technique
China is Shaolin country, and the forest reserves are deficient, since last century the nineties start, natural high-quality large diameter timber
It is fewer and fewer, needs to timber-work, artificial fast-growing are increasingly improved in order to meet the national economic development and living standards of the people
Material, low low-grade wood and small diameter grade material kind have become the primary raw material of wood processing industry.Therefore, make full use of felling remaining
Object, industrial wood waste and inferior timber develop wood-based plate and wood adhesion product, are to solve the contradictory effective measures of timber supply and demand.
Adhesive used in wood processing industry is mostly the adhesive made of synthetic resin for deriving from oil product, such as phenolic resin and ureaformaldehyde
Resin, although being able to satisfy the requirement of bonding quality, there is also the Form aldehyde release problems of drawback, especially wood-based panel product
As hot spot concerned by people.For this purpose, in addition to some industrially developed country utilize adhesive except Improvement and rationally in the world,
It is being dedicated to finding new adhesive system or new cementing mask-making technology, the life of wood-based plate is such as carried out using no aldehyde adhesive
It produces, or uses Binderless binding technology pressed sheet.
Binderless binding is a kind of without adhesive made of synthetic resin such as additional traditional Lauxites or phenolic resin, by wood
The chemical component that material itself contains realizes " self bonding " under specific process conditions and is bonded into the technology of plate.It is glued
Mechanism is to activate plant fiber material surface by special processing method, and this activation includes lignin and carbon hydrate
Oxidation, nitrification, hydrolysis, polycondensation, dehydration, degradation and its free radical initiation of object etc., while generating the substance for being similar to adhesive
And make to be glued material under hot pressing condition gluing at plate.Currently, research glue-free artificial board is mainly helped using chemistry both at home and abroad
Agent handles plant fiber material, to improve its surface-active, realizes Binderless binding.Binderless binding process is extremely complex, mainly
The ingredients such as cellulose, hemicellulose, lignin in wood fibre occur a series of variations and are bonded into plate.The master of wood fibre
It wants in constituent, cellulose, hemicellulose and lignin etc. can form very strong intramolecular and intermolecular hydrogen bonding, oversubscription
The crystalline sequence of local structured present in minor structure and cellulose makes the hydroxyl quilt of most of high response in wood-fibred
It is enclosed in crystal region, affects the reactivity of hydroxyl.Therefore, how wood fibre is pre-processed, is solved as much as possible
Except hydrogen bond action, so that more activity hydroxy separate outs, so that the reactivity for improving wood fibre is Binderless binding skill
An importance in art.The activation of wood fibre plays an important role in Binderless binding.
Summary of the invention
The invention solves the prior arts to carry out the low problem of pretreatment reaction activity to wood fibre, and provides a kind of wood
The activation method of matter fiber.
One, with alkaline-polyethylene glycol-amino-compound mixed aqueous solution:
Alkali, polyethylene glycol and amino-compound are added to the water, stirring and dissolving obtains alkali-polyethylene glycol-amino chemical combination
The mixed aqueous solution of object；
The mass percent of alkali is 5%~10% in the alkali-polyethylene glycol-amino-compound mixed aqueous solution；
The mass percent of polyethylene glycol is 4%~8% in the alkali-polyethylene glycol-amino-compound mixed aqueous solution；It is described
Alkali-polyethylene glycol-amino-compound mixed aqueous solution in amino-compound mass percent be 4%~8%；
The alkali is the mixture of one or both of sodium hydroxide and potassium hydroxide；The polyethylene glycol is poly-
One of ethylene glycol 200, Liquid Macrogol, polyethylene glycol 400 and Macrogol 600 or in which several mixtures；It is described
Amino-compound be one of urea, diethanol amine and triethanolamine or in which several mixtures；
Two, the sprinkling processing of wood fibre:
Wood fibre is placed in baking oven and is dried to over dry, then under agitation, by alkali-polyethylene glycol-amino chemical combination
The mixed aqueous solution of object is uniformly sprayed on the wood fibre of over dry, obtains sprinkling treated wood fibre；
The mass ratio of the wood fibre of alkali-polyethylene glycol-amino-compound mixed aqueous solution and over dry is 1:
(10~15)；
Three, freezing processing:
The compacting of treated wood fibre will be sprayed with precompressed utensil, the wood fibre after compacting is then placed in temperature
To freeze 0.5h~2h in -15 DEG C of refrigerator, the wood fibre of freezing processing is obtained；
Four, the control of moisture content:
The wood fibre moisture content of freezing processing is adjusted to 15%~25%, the wood fibre after being activated.
The beneficial effects of the present invention are: using cryogenic freezing technology and so as to the profit of alkali, polyethylene glycol and amino-compound
Swollen activation destroys the hydrogen bond of cellulose, hemicellulose in wood fibre, to achieve the purpose that activate wood fibre, in heat
Under the action of enable more hydroxyls to participate in chemically reacting, to realize the Binderless binding under hot pressing between wood fibre.
By the way that by treated, wood fibre is directly hot pressed into the test of plate it is found that fiberboard quiet Qu Qiang with higher
Degree and internal bond strength, water resistance also have certain improvement.This illustrates that the present invention has preferably the activation of wood fibre
Effect can improve fibreboard performance in conjunction with no aldehyde glue or other auxiliary agents or realize the Binderless binding of wood fibre.
The present invention is used for a kind of activation method of wood fibre.
Detailed description of the invention
Fig. 1 is the Fourier transform infrared spectroscopy figure of the wood fibre of distinct methods activation, and 1 is the preparation of comparative experiments one
Treated wood fibre, the wood fibre after 2 activation prepared for comparative experiments two, 3 activation prepared for comparative experiments three
Wood fibre afterwards, the wood fibre after 4 activation prepared for comparative experiments four, the wood after 5 activation prepared for embodiment one
Matter fiber；
Fig. 2 is the partial enlarged view of Fig. 1.
Specific embodiment
Specific embodiment 1: a kind of activation method of wood fibre of present embodiment is to sequentially include the following steps:
One, with alkaline-polyethylene glycol-amino-compound mixed aqueous solution:
Alkali, polyethylene glycol and amino-compound are added to the water, stirring and dissolving obtains alkali-polyethylene glycol-amino chemical combination
The mixed aqueous solution of object；
The mass percent of alkali is 5%~10% in the alkali-polyethylene glycol-amino-compound mixed aqueous solution；
The mass percent of polyethylene glycol is 4%~8% in the alkali-polyethylene glycol-amino-compound mixed aqueous solution；It is described
Alkali-polyethylene glycol-amino-compound mixed aqueous solution in amino-compound mass percent be 4%~8%；
The alkali is the mixture of one or both of sodium hydroxide and potassium hydroxide；The polyethylene glycol is poly-
One of ethylene glycol 200, Liquid Macrogol, polyethylene glycol 400 and Macrogol 600 or in which several mixtures；It is described
Amino-compound be one of urea, diethanol amine and triethanolamine or in which several mixtures；
Two, the sprinkling processing of wood fibre:
Wood fibre is placed in baking oven and is dried to over dry, then under agitation, by alkali-polyethylene glycol-amino chemical combination
The mixed aqueous solution of object is uniformly sprayed on the wood fibre of over dry, obtains sprinkling treated wood fibre；
The mass ratio of the wood fibre of alkali-polyethylene glycol-amino-compound mixed aqueous solution and over dry is 1:
(10~15)；
Three, freezing processing:
The compacting of treated wood fibre will be sprayed with precompressed utensil, the wood fibre after compacting is then placed in temperature
To freeze 0.5h~2h in -15 DEG C of refrigerator, the wood fibre of freezing processing is obtained；
Four, the control of moisture content:
The wood fibre moisture content of freezing processing is adjusted to 15%~25%, the wood fibre after being activated.
Wood fibre described in present embodiment is the lignocellulose plant fibre with content of cellulose, including several wooden fibres
Tie up mixed weedtree fiber.
The beneficial effect of present embodiment is: using cryogenic freezing technology and so as to alkali, polyethylene glycol and amino-compound
Swollen activation destroy wood fibre in cellulose, hemicellulose hydrogen bond, thus achieve the purpose that activate wood fibre,
Enable more hydroxyls to participate in chemically reacting under the action of heat, thus realize under hot pressing between wood fibre without glue glue
It closes.
By the way that by treated, wood fibre is directly hot pressed into the test of plate it is found that fiberboard quiet Qu Qiang with higher
Degree and internal bond strength, water resistance also have certain improvement.This illustrate present embodiment for the activation of wood fibre have compared with
Good effect can improve fibreboard performance in conjunction with no aldehyde glue or other auxiliary agents or realize the Binderless binding of wood fibre.
Specific embodiment 2: the present embodiment is different from the first embodiment in that: alkali-described in step 1 is poly-
The mass percent of alkali is 6% in ethylene glycol-amino-compound mixed aqueous solution.It is other same as the specific embodiment one.
Specific embodiment 3: unlike one of present embodiment and specific embodiment one or two: institute in step 1
The mass percent of polyethylene glycol is 6% in the alkali stated-polyethylene glycol-amino-compound mixed aqueous solution.It is other with it is specific
Embodiment one or two is identical.
Specific embodiment 4: unlike one of present embodiment and specific embodiment one to three: institute in step 1
The mass percent of amino-compound is 6% in the alkali stated-polyethylene glycol-amino-compound mixed aqueous solution.Other and tool
Body embodiment one to three is identical.
Specific embodiment 5: unlike one of present embodiment and specific embodiment one to four: institute in step 2
The mass ratio of the wood fibre of the alkali-polyethylene glycol-amino-compound mixed aqueous solution and over dry stated is 1:12.Other and tool
Body embodiment one to four is identical.
Specific embodiment 6: unlike one of present embodiment and specific embodiment one to five: institute in step 1
The water stated is tap water or distilled water.It is other identical as specific embodiment one to five.
Specific embodiment 7: unlike one of present embodiment and specific embodiment one to six: being used in step 3
Precompressed utensil will spray the compacting of treated wood fibre, and the wood fibre after compacting is then placed in the ice that temperature is -15 DEG C
1h is freezed in case.It is other identical as specific embodiment one to six.
Specific embodiment 8: unlike one of present embodiment and specific embodiment one to seven: will in step 4
The wood fibre moisture content of freezing processing is adjusted to 20%.It is other identical as specific embodiment one to seven.
Specific embodiment 9: unlike one of present embodiment and specific embodiment one to eight: will in step 4
The wood fibre moisture content of freezing processing is adjusted to 15%~20%.It is other identical as specific embodiment one to eight.
Specific embodiment 10: unlike one of present embodiment and specific embodiment one to nine: will in step 4
The wood fibre moisture content of freezing processing is adjusted to 20%~25%.It is other identical as specific embodiment one to nine.
Beneficial effects of the present invention are verified using following embodiment:
Embodiment one:
A kind of activation method of wood fibre is to sequentially include the following steps:
One, with alkaline-polyethylene glycol-amino-compound mixed aqueous solution:
Alkali, polyethylene glycol and amino-compound are added to the water, stirring and dissolving obtains alkali-polyethylene glycol-amino chemical combination
The mixed aqueous solution of object；
The mass percent of alkali is 6% in the alkali-polyethylene glycol-amino-compound mixed aqueous solution；Described
The mass percent of polyethylene glycol is 6% in alkali-polyethylene glycol-amino-compound mixed aqueous solution；The poly- second two of the alkali-
The mass percent of amino-compound is 6% in alcohol-amino-compound mixed aqueous solution；
The alkali is sodium hydroxide；The polyethylene glycol is polyethylene glycol 400；The amino-compound is urine
Element；
Two, the sprinkling processing of wood fibre:
Wood fibre is placed in the baking oven that temperature is 50 DEG C and is dried to over dry, then under agitation, by the poly- second two of alkali-
Alcohol-amino-compound mixed aqueous solution is uniformly sprayed on the wood fibre of over dry, obtains sprinkling treated wood fibre；
The mass ratio of the wood fibre of alkali-polyethylene glycol-amino-compound mixed aqueous solution and over dry is 1:
12；
Three, freezing processing:
The compacting of treated wood fibre will be sprayed with precompressed utensil, the wood fibre after compacting is then placed in temperature
To freeze 1h in -15 DEG C of refrigerator, the wood fibre of freezing processing is obtained；
Four, the control of moisture content:
It is 20% by the wood fibre air drying of freezing processing to moisture content, the wood fibre after being activated；
Water described in step 1 is distilled water；
Wood fibre described in step 2 is weedtree fiber；The weedtree fiber, group are divided into Korean pine (Pinus
Koraiensis), larch (Larix gmelinii), Cathay poplar (Populus cathayana) etc., moisture content are lower than 5%, fibre
20 mesh of form~80 mesh are tieed up, are provided by Daxing'an Mountainrange Hengyou's furniture Group Co., Ltd.
Comparative experiments one:
Wood fibre is placed in the baking oven that temperature is 50 DEG C and is dried to over dry, distilled water is uniformly sprayed to the wooden of over dry
On fiber, wood fibre moisture content is adjusted to 20%, the wood fibre that obtains that treated.
The wood fibre is weedtree fiber；The weedtree fiber, group be divided into Korean pine (Pinus koraiensis),
Larch (Larix gmelinii), Cathay poplar (Populus cathayana) etc., moisture content be lower than 5%, 20 mesh of fibre morphology~
80 mesh are provided by Daxing'an Mountainrange Hengyou's furniture Group Co., Ltd.
Comparative experiments two:
Wood fibre is placed in the baking oven that temperature is 50 DEG C and is dried to over dry, distilled water is uniformly sprayed to the wooden of over dry
On fiber, wood fibre moisture content is adjusted to 20%, obtains sprinkling treated wood fibre, is handled sprinkling with precompressed utensil
Wood fibre after compacting, is then placed in the refrigerator that temperature is -15 DEG C and freezes 1h, activated by wood fibre compacting afterwards
Wood fibre afterwards.
The wood fibre is weedtree fiber；The weedtree fiber, group be divided into Korean pine (Pinus koraiensis),
Larch (Larix gmelinii), Cathay poplar (Populus cathayana) etc., moisture content be lower than 5%, 20 mesh of fibre morphology~
80 mesh are provided by Daxing'an Mountainrange Hengyou's furniture Group Co., Ltd.
Comparative experiments three:
One, with the aqueous solution of alkaline:
Alkali is added to the water, stirring and dissolving obtains the aqueous solution of alkali；
The mass percent of alkali is 6% in the aqueous solution of the alkali；
The alkali is sodium hydroxide；
Two, the sprinkling processing of wood fibre:
Wood fibre is placed in the baking oven that temperature is 50 DEG C and is dried to over dry, then under agitation, by the water-soluble of alkali
Liquid is uniformly sprayed on the wood fibre of over dry, obtains sprinkling treated wood fibre；
The mass ratio of the wood fibre of the aqueous solution and over dry of the alkali is 1:12；
Three, freezing processing:
The compacting of treated wood fibre will be sprayed with precompressed utensil, the wood fibre after compacting is then placed in temperature
To freeze 1h in -15 DEG C of refrigerator, the wood fibre of freezing processing is obtained；
Four, the control of moisture content:
It is 20% by the wood fibre air drying of freezing processing to moisture content, the wood fibre after being activated；
The water is distilled water；The wood fibre is weedtree fiber；The weedtree fiber, group are divided into Korean pine
(Pinus koraiensis), larch (Larix gmelinii), Cathay poplar (Populus cathayana) etc., moisture content is low
In 5%, 20 mesh of fibre morphology~80 mesh is provided by Daxing'an Mountainrange Hengyou's furniture Group Co., Ltd.
Comparative experiments four:
One, with alkaline-polyethylene glycol mixed aqueous solution:
Alkali and polyethylene glycol are added to the water, stirring and dissolving obtains alkali-polyethylene glycol mixed aqueous solution；
The mass percent of alkali is 6% in alkali-polyethylene glycol mixed aqueous solution；Alkali-the polyethylene glycol
Mixed aqueous solution in polyethylene glycol mass percent be 12%；
The alkali is sodium hydroxide；The polyethylene glycol is polyethylene glycol 400；
Two, the sprinkling processing of wood fibre:
Wood fibre is placed in the baking oven that temperature is 50 DEG C and is dried to over dry, then under agitation, by the poly- second two of alkali-
The mixed aqueous solution of alcohol is uniformly sprayed on the wood fibre of over dry, obtains sprinkling treated wood fibre；
The mass ratio of the wood fibre of alkali-polyethylene glycol mixed aqueous solution and over dry is 1:12；
Three, freezing processing:
The compacting of treated wood fibre will be sprayed with precompressed utensil, the wood fibre after compacting is then placed in temperature
To freeze 1h in -15 DEG C of refrigerator, the wood fibre of freezing processing is obtained；
Four, the control of moisture content:
It is 20% by the wood fibre air drying of freezing processing to moisture content, the wood fibre after being activated；
Water described in step 1 is distilled water；
Wood fibre described in step 2 is weedtree fiber；The weedtree fiber, group are divided into Korean pine (Pinus
Koraiensis), larch (Larix gmelinii), Cathay poplar (Populus cathayana) etc., moisture content are lower than 5%, fibre
20 mesh of form~80 mesh are tieed up, are provided by Daxing'an Mountainrange Hengyou's furniture Group Co., Ltd.
For the activation effect for probing into wood fibre, wood fibre prepared by embodiment one and comparative experiments one to four is direct
It is hot pressed into fiberboard, by the mechanical strength and expansion rate of water absorption of fiberboard, characterizes the activation effect of wood fibre.Hot pressing selection
Flat-press process, board dimension are 200mm × 200mm, and finished product plate thickness about 4mm, upper plate temperature is 190 DEG C, and lower plate temperatures are 190 DEG C；
1., pressure is first risen into 5MPa in hot pressing, in the case where pressure is 5MPa, then precompressed 2min is risen to pressure by 5MPa
10MPa, in the case where pressure is 10MPa, hot pressing 2min；2., repeat 1. process it is primary, release obtains single-layer slab.
The performance test results of single-layer slab prepared by 1 embodiment one of table and comparative experiments one to four
The performance test results of the single-layer slab prepared from 1 embodiment one of table and comparative experiments one to four, which can be seen that, to be added
Water cooling freezes (comparative experiments two), adding sodium hydroxide aqueous solution freezes (comparative experiments three), adding sodium hydroxide/polyethylene glycol mixing water
Solution freezing (comparative experiments four) and adding sodium hydroxide/polyethylene glycol/urea mixed aqueous solution freezing (embodiment one) can live
Chemical fibre dimension, its mechanical property of plate made from hot pressing and expansion rate of water absorption are superior to the fiber of unactivated (comparative experiments one),
Middle adding sodium hydroxide/polyethylene glycol/urea mixed aqueous solution freezing activation effect is best；Comparative experiments two and comparative experiments one
Control is as can be seen that freezing conditions play remarkable result in activation process.Comparative experiments three is shown compared with comparative experiments two
The activation effect of alkali process out.Comparative experiments four and embodiment one show that polyethylene glycol and urea are added in aqueous slkali can be promoted
Activation.Comparative experiments four and embodiment one substantially exceed the performance of high-class product in medium density fibre board (MDF) requirements of the national standard
It is required that (internal bond strength >=0.65MPa, static bending strength >=23MPa, thickness swelling rate≤30%).
Fig. 1 is the Fourier transform infrared spectroscopy figure of the wood fibre of distinct methods activation, and 1 is the preparation of comparative experiments one
Treated wood fibre, the wood fibre after 2 activation prepared for comparative experiments two, 3 activation prepared for comparative experiments three
Wood fibre afterwards, the wood fibre after 4 activation prepared for comparative experiments four, the wood after 5 activation prepared for embodiment one
Matter fiber；Fig. 2 is the partial enlarged view of Fig. 1；Ftir analysis the result shows that: sample infrared spectrum curve base
This is similar, and pretreatment does not significantly change the chemical component of timber.3700-3000cm-1(O-H stretching vibration) peak shape narrows,
And it is mobile to high wave number, so molecular association degree becomes smaller, the binding force of hydrogen is smaller between cellulosic molecule, show in cellulose-
The amplitude of fluctuation of OH group becomes larger.2927cm-1And 2847cm-1It is the asymmetry and symmetrical stretching vibration of C-H, peak intensity respectively
Weaken and respectively to compared with lower wave number (2921cm-1) and higher wave number (2851cm-1) it is mobile, these variations show hemicellulose and
Methyl and methylene in lignin are destroyed.Along with the characteristic absorption peak 1735cm of hemicellulose-1、1374cm-1Almost disappear
It loses, the characteristic peak 1592/1503cm of lignin-1(C=C stretching vibration), 1456cm-1(CH3Asymmetric bending vibration) and
1251cm-1(the C-O vibration in lilac ring) is through NaOH/ polyethylene glycol/urea system freezing processing postpeak strength reduction, table
Weedtree fiberoptic fiber element and the fracture of hemicellulose glucoside key increase after bright NaOH/ polyethylene glycol/urea system freezing processing, part wood
Quality degradation, the hydrogen bond network of fibrinogen are destroyed, and freezing prevents hydrogen bond from recombinating, and the quantity of activity hydroxy increases, so that wooden
Cellulose surface increased activity.
Claims (10)
1. a kind of activation method of wood fibre, it is characterised in that a kind of activation method of wood fibre be according to the following steps into
Row:
One, with alkaline-polyethylene glycol-amino-compound mixed aqueous solution:
Alkali, polyethylene glycol and amino-compound are added to the water, stirring and dissolving obtains alkali-polyethylene glycol-amino-compound
Mixed aqueous solution；
The mass percent of alkali is 5%~10% in the alkali-polyethylene glycol-amino-compound mixed aqueous solution；It is described
Alkali-polyethylene glycol-amino-compound mixed aqueous solution in polyethylene glycol mass percent be 4%~8%；Described
The mass percent of amino-compound is 4%~8% in alkali-polyethylene glycol-amino-compound mixed aqueous solution；
The alkali is the mixture of one or both of sodium hydroxide and potassium hydroxide；The polyethylene glycol is poly- second two
One of alcohol 200, Liquid Macrogol, polyethylene glycol 400 and Macrogol 600 or in which several mixtures；The ammonia
Based compound is one of urea, diethanol amine and triethanolamine or in which several mixtures；
Two, the sprinkling processing of wood fibre:
Wood fibre is placed in baking oven and is dried to over dry, then under agitation, by alkali-polyethylene glycol-amino-compound
Mixed aqueous solution is uniformly sprayed on the wood fibre of over dry, obtains sprinkling treated wood fibre；
The mass ratio of the wood fibre of alkali-polyethylene glycol-amino-compound mixed aqueous solution and over dry be 1:(10~
15)；
Three, freezing processing:
The compacting of treated wood fibre will be sprayed with precompressed utensil, it is -15 that the wood fibre after compacting, which is then placed in temperature,
DEG C refrigerator in freeze 0.5h~2h, obtain the wood fibre of freezing processing；
Four, the control of moisture content:
The wood fibre moisture content of freezing processing is adjusted to 15%~25%, the wood fibre after being activated.
2. a kind of activation method of wood fibre according to claim 1, it is characterised in that alkali-described in step 1 is poly-
The mass percent of alkali is 6% in ethylene glycol-amino-compound mixed aqueous solution.
3. a kind of activation method of wood fibre according to claim 1, it is characterised in that alkali-described in step 1 is poly-
The mass percent of polyethylene glycol is 6% in ethylene glycol-amino-compound mixed aqueous solution.
4. a kind of activation method of wood fibre according to claim 1, it is characterised in that alkali-described in step 1 is poly-
The mass percent of amino-compound is 6% in ethylene glycol-amino-compound mixed aqueous solution.
5. a kind of activation method of wood fibre according to claim 1, it is characterised in that alkali-described in step 2 is poly-
The mass ratio of the wood fibre of ethylene glycol-amino-compound mixed aqueous solution and over dry is 1:12.
6. a kind of activation method of wood fibre according to claim 1, it is characterised in that water described in step 1 is
Tap water or distilled water.
7. a kind of activation method of wood fibre according to claim 1, it is characterised in that use precompressed utensil in step 3
Will sprinkling treated wood fibre compacting, then the wood fibre after compacting is placed in the refrigerator that temperature is -15 DEG C and is freezed
1h。
8. a kind of activation method of wood fibre according to claim 1, it is characterised in that by freezing processing in step 4
Wood fibre moisture content be adjusted to 20%.
9. a kind of activation method of wood fibre according to claim 1, it is characterised in that by freezing processing in step 4
Wood fibre moisture content be adjusted to 15%~20%.
10. a kind of activation method of wood fibre according to claim 1, it is characterised in that by freezing processing in step 4
Wood fibre moisture content be adjusted to 20%~25%.
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| CN107822005A (en) * | 2017-12-05 | 2018-03-23 | 刘宏辉 | A kind of type of resistance to jelly surimi product |
| CN112080016B (en) * | 2020-09-21 | 2021-09-21 | 中国科学院长春应用化学研究所 | Biomass material and preparation method thereof |
| CN112720769A (en) * | 2020-12-25 | 2021-04-30 | 浙江农林大学 | Preparation method of environment-friendly high-strength wood fiber-based composite material |
| CN115319877B (en) * | 2022-08-29 | 2023-05-16 | 广西壮族自治区林业科学研究院 | Timber surface densification treatment method |
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