CN108858604A - A kind of wood chemistry sofening treatment method - Google Patents
A kind of wood chemistry sofening treatment method Download PDFInfo
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- CN108858604A CN108858604A CN201810692822.9A CN201810692822A CN108858604A CN 108858604 A CN108858604 A CN 108858604A CN 201810692822 A CN201810692822 A CN 201810692822A CN 108858604 A CN108858604 A CN 108858604A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/50—Mixtures of different organic impregnating agents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/0005—Cryogenic treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/003—Treating of wood not provided for in groups B27K1/00, B27K3/00 by using electromagnetic radiation or mechanical waves
- B27K5/0065—Ultrasonic treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/06—Softening or hardening of wood
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a kind of wood chemistry sofening treatment methods, belong to timber treatment technology field.Timber is first cut into veneer by the wood chemistry sofening treatment method that the present invention uses, pretreatment veneer is made through liquid nitrogen frozen and microwave thawing circulation after veneer is soaked in water, pretreatment veneer ultrasonic immersing is taken out after enzymolysis liquid, constant temperature pressurized treatments, low temperature drying obtains enzymatic hydrolysis veneer；Veneer first will be digested and catalyst mixes, under inert gas shielding, oxyalkylene and isocyanates is added, after heating compressive reaction, veneer is taken out, modified veneer is obtained；After veneer linseed oil and linoleic acid impregnation mixture being modified, hot pressing is cooling, that is, completes the Chemical softnessprocess to timber.The timber that the present invention is handled has excellent mechanical property, flexibility and elasticity.
Description
Technical field
The invention discloses a kind of wood chemistry sofening treatment methods, belong to timber treatment technology field.
Background technique
Timber is widely used one of the material of the mankind.With the continuous improvement of people's aesthetic standard, it is desirable that can produce
With curved woodwork.Timber is a kind of polymer, is difficult to brake forming at typical condition.As can soften timber,
The processing performance that it can be improved produces the favorite woodwork of more people.The main component of timber is cellulose, half fiber
Dimension element and lignin.It is a kind of elastic-viscoplastic body, and each ingredient all has glass transition temperature, such as certain to sub- timber
Moisture and temperature, so that it may glass transition process occurs, engineering properties changes rapidly.Although cellulose, hemicellulose
At 100 DEG C or more, but when it absorbs large quantity of moisture, glass transition temperature will reduce the softening temperature of element and lignin.
Therefore certain chemical agents may be selected handles timber at low temperature, gives timber temporary flexibility, is then processed into institute
The shape needed can be formed after the drying of wood, and restore original rigidity and mechanical strength.
Traditional timber softening method is hydro-thermal softening, and liquefied ammonia softening, both softening method effects are preferable, but the former is soft
Change degree is restricted, and requirement of the latter to equipment is high, this is relatively difficult to achieve to small factory or township enterprise.
It carries out decatize or hot water using saturated vapor to boil, steam pressure, time when processing, with tree species, material
Depending on thickness.In steaming procedure, due to forming hydrogen bond through base portion point on the molecular link of cellulose amorphous region, it is partially in free
State.Free is polar group through base, is easy to adsorb polar hydrone, but this absorption is limited only to amorphous region,
Namely water can only enter amorphous region, and not enter crystal region.Therefore, the method for decatize softening only obtains the local of processing material
To softening, bending degree is restricted, if excessively improve steam pressure, lengthen processing the time, not only reduce production efficiency,
Production cost is increased, but also the mechanical property of timber can be damaged.The timber of liquefied ammonia softening is very easily molded, and can be made into complexity
Shape.Liquefied ammonia can not only enter the amorphous region of cellulose, but also can enter the crystal region of cellulose, and form ammonia fibre
Tie up plain crystalline texture, different molecular links is separated from each other by it, and occurs strong reaction through base on cellulose, but it
Molecule is too small, it is difficult to dissolve cellulose.Since liquefied ammonia enters crystal region, so that its softened region expands, to increase wood
The effect of material softening.But anhydrous liquid ammonia be ammonia at low temperature, or under stress be in liquid condition nitrogen, it is therefore necessary in ammonia itself
Vapour pressure under impregnated.The hydro-thermal softening and liquefied ammonia that timber softening process traditional at present uses soften in treatment process
In, softening degree is not high when hydro-thermal softens, and is easy damage Wood mechanical property, and liquefied ammonia softening needs to protect during processing
It holds ammonia to be in a liquid state, the high requirements on the equipment, and the problem of the residual of ammonia easily causes secondary pollution, therefore also needs to carry out it
Research.
Summary of the invention
The present invention solves the technical problem of：The hydro-thermal softening and liquefied ammonia used for traditional timber softening process is soft
Change during processing, softening degree is not high when hydro-thermal softens, and is easy damage Wood mechanical property, and liquefied ammonia softening is being handled
It needs that ammonia is kept to be in a liquid state in the process, the high requirements on the equipment, and the problem of the residual of ammonia easily causes secondary pollution, provides
A kind of wood chemistry sofening treatment method.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is that：
（1）Timber is cut into veneer, then is taken out after veneer is soaked in water, is recycled 8~10 times through liquid nitrogen frozen and microwave thawing,
Veneer must be pre-processed；
（2）Pretreatment veneer ultrasonic immersing is taken out after enzymolysis liquid, after 6~8h of constant temperature pressurized treatments, low temperature drying must be digested
Veneer；
（3）According to parts by weight, 100~200 parts of enzymatic hydrolysis veneers, 60~90 parts of part oxyalkylenes, 50~60 parts of isocyanides are successively taken
Acid esters, 8~10 parts of catalyst, first will enzymatic hydrolysis veneer and catalyst mix, under inert gas shielding, be added oxyalkylene and
Veneer is taken out after heating compressive reaction, obtains modified veneer by isocyanates；
（4）After veneer linseed oil and linoleic acid impregnation mixture being modified, hot pressing is cooling, that is, completes soft to the chemistry of timber
Change processing.
Step（1）The timber be poplar, China fir, willow, oak, Eucalyptus, teak, sour branch wood, rosewood, Door frame,
Any one in walnut or lignum cinnamomi camphorae.
Step（1）The veneer is the veneer with a thickness of 1~20mm.
Step（1）The liquid nitrogen frozen and microwave thawing circulation are：After 20~40s of liquid nitrogen frozen, it is in microwave power
Under the conditions of 200~300W, thaw 10~20min.
Step（2）The enzymolysis liquid is formulated by the raw material of following parts by weight：100~200 parts of water, 3~5 parts of rouge
Fat enzyme, 2~4 parts of protease, 3~5 parts of amylase, 8~10 parts of phosphatide, 0.2~0.4 part of calcium chloride.
Step（3）The oxyalkylene is any one in propylene oxide or ethylene oxide.
Step（3）The isocyanates is toluene di-isocyanate(TDI), methyl diphenylene diisocyanate or trimethyl cyclohexane
Any one in diisocyanate.
Step（3）The catalyst is any one in sodium hydroxide, potassium hydroxide or lithium hydroxide.
Step（3）The inert gas is any one in nitrogen or argon gas.
Step（4）It is 1 that the linseed oil and linoleic acid mixture are by linseed oil and linoleic acid in mass ratio：1~10：1
It mixes.
The beneficial effects of the invention are as follows：
The present invention uses liquid nitrogen frozen and microwave thawing to pre-process wood single-plate first, during liquid nitrogen frozen, wood
Volume expansion occurs because of icing for the water inside material plant cell and in space between cells, and in course of defrosting, ice crystal is converted again
At water, further internally hole permeates, so that the substance diffusion admittance between wood cell gap is widened, in addition, freezing
Cell wall in part is ruptured because of volume expansion in journey, is spread to be conducive to substance to cell interior, in subsequent enzymatic hydrolysis
In the process, obtain part macromolecular organic matter in cell the further enzymolysis processing of wood single-plate by using self-control enzymolysis liquid
With hydrolysis, the small-molecule substance with active hydroxyl, amino is generated, during subsequent reactions, wherein having multiple activity
The small-molecule substance of hydroxyl reacts with oxyalkylene and isocyanates under the action of catalyst, is formed and has carbamic acid
The polymer of ester group, thus degradable part organic matter unstable in system is converted into the flexibility of product system and
Elasticity has a contributive polymer, and the generation of the reaction is in the space between cells of timber, and therefore, the polymer of formation can will be wooden
Material internal clearance is effectively filled, and while improving product flexibility and elasticity, makes the mechanical property of product on the original basis
It is further promoted, eventually by linseed oil and linoleic effect, further compensates for the defects of system structure, make the power of product
It learns performance and flexibility, elasticity is further promoted.
Specific embodiment
Timber is cut into the veneer with a thickness of 1~20mm, then is taken out after veneer is impregnated 6~8h in water, surface is drained
After moisture, be transferred in microwave applicator with 20~40s of liquid nitrogen frozen, then by the veneer after freezing, in microwave power be 200~
Under the conditions of 300W, thaw 10~20min, and such liquid nitrogen frozen and microwave thawing recycle 8~10 times, obtains pretreatment veneer；By institute
Veneer must be pre-processed to be impregnated in enzymolysis liquid, under the conditions of supersonic frequency is 45~55kHz, taken after 10~15min of ultrasonic immersing
Out, then by the veneer after ultrasonic immersing be transferred in autoclave, in temperature be 30~35 DEG C, pressure be 0.6~1.2MPa under the conditions of,
Taken out after 6~8h of constant temperature pressurized treatments, then at temperature be 55~65 DEG C under the conditions of, low temperature drying to constant weight obtains enzymatic hydrolysis veneer；It presses
Parts by weight meter, successively takes 100~200 parts of enzymatic hydrolysis veneers, 60~90 parts of part oxyalkylenes, 50~60 parts of isocyanates, and 8~10
Part catalyst will first digest veneer and catalyst pours into reaction kettle, be 80~90 DEG C in temperature, revolving speed is 120~180r/
Under the conditions of min, it is stirred 10~20min, then inert gas is passed through into reaction kettle with 600~800L/min rate, in lazy
Property gas protection status under, oxyalkylene and isocyanates are sequentially added into reaction kettle, is 90~95 DEG C in temperature, pressure is
Under the conditions of 0.3~0.6MPa, after heating 4~6h of compressive reaction, veneer is taken out, modified veneer is obtained；Again by the modified veneer of gained
It is impregnated in linseed oil and linoleic acid mixture, under the conditions of supersonic frequency is 40~50kHz, after 20~40min of ultrasonic immersing,
It takes out, is 140~160 DEG C then at temperature, under the conditions of pressure is 10~15MPa, 5~10min of hot pressing, then through naturally cooling to room
Temperature completes the Chemical softnessprocess to timber.The timber be poplar, China fir, willow, oak, Eucalyptus, teak, sour branch wood,
Any one in rosewood, Door frame, walnut or lignum cinnamomi camphorae.The enzymolysis liquid is prepared by the raw material of following parts by weight
It forms：100~200 parts of water, 3~5 parts of lipase, 2~4 parts of protease, 3~5 parts of amylase, 8~10 parts of phosphatide, 0.2~0.4
Part calcium chloride.The oxyalkylene is any one in propylene oxide or ethylene oxide.The isocyanates is that toluene two is different
Any one in cyanate, methyl diphenylene diisocyanate or trimethylhexane diisocyanate.The catalyst is hydrogen
Any one in sodium oxide molybdena, potassium hydroxide or lithium hydroxide.The inert gas is any one in nitrogen or argon gas.Institute
It states linseed oil and linoleic acid mixture be by linseed oil and linoleic acid is 1 in mass ratio：1~10：1 mixes.
Example 1
Timber is cut into the veneer with a thickness of 20mm, then is taken out after veneer is impregnated 8h in water, after draining surface moisture, uses liquid
Chilled nitrogen 40s, then the veneer after freezing is transferred in microwave applicator, under the conditions of microwave power is 300W, defrosting 20min,
Such liquid nitrogen frozen and microwave thawing recycle 10 times, obtain pretreatment veneer；Gained pretreatment veneer is impregnated in enzymolysis liquid, in
Under the conditions of supersonic frequency is 55kHz, taken out after ultrasonic immersing 15min, then the veneer after ultrasonic immersing is transferred in autoclave, in
Temperature be 35 DEG C, pressure be 1.2MPa under the conditions of, taken out after constant temperature pressurized treatments 8h, then at temperature be 65 DEG C under the conditions of, low temperature
Drying to constant weight, obtains enzymatic hydrolysis veneer；According to parts by weight, 200 parts of enzymatic hydrolysis veneers are successively taken, 90 parts of part oxyalkylenes, 60 parts different
Cyanate, 10 parts of catalyst, first will enzymatic hydrolysis veneer and catalyst pour into reaction kettle, in temperature be 90 DEG C, revolving speed 180r/
Under the conditions of min, it is stirred 20min, then inert gas is passed through into reaction kettle with 800L/min rate, in inert gas shielding
Under state, oxyalkylene and isocyanates are sequentially added into reaction kettle, in temperature be 95 DEG C, pressure be 0.6MPa under the conditions of,
After heating compressive reaction 6h, veneer is taken out, modified veneer is obtained；The modified veneer of gained is impregnated in linseed oil again and linoleic acid mixes
It closes in object, under the conditions of supersonic frequency is 50kHz, after ultrasonic immersing 40min, takes out, be 160 DEG C then at temperature, pressure is
Under the conditions of 15MPa, hot pressing 10min, then through cooled to room temperature, that is, complete the Chemical softnessprocess to timber.The timber
For poplar.The enzymolysis liquid is formulated by the raw material of following parts by weight：200 parts of water, 5 parts of lipase, 4 parts of protease, 5
Part amylase, 10 parts of phosphatide, 0.4 part of calcium chloride.The oxyalkylene is propylene oxide.The isocyanates is toluene diisocyanate
Acid esters.The catalyst is sodium hydroxide.The inert gas is nitrogen.The linseed oil and linoleic acid mixture are by flax
Oil and linoleic acid are 10 in mass ratio：1 mixes.
Example 2
Timber is cut into the veneer with a thickness of 20mm, then veneer is impregnated in enzymolysis liquid, in supersonic frequency be 55kHz condition
Under, it is taken out after ultrasonic immersing 15min, then the veneer after ultrasonic immersing is transferred in autoclave, is 35 DEG C in temperature, pressure is
Under the conditions of 1.2MPa, taken out after constant temperature pressurized treatments 8h, then at temperature be 65 DEG C under the conditions of, low temperature drying to constant weight must digest
Veneer；According to parts by weight, 200 parts of enzymatic hydrolysis veneers are successively taken, 90 parts of part oxyalkylenes, 60 parts of isocyanates, 10 parts of catalyst,
First enzymatic hydrolysis veneer and catalyst are poured into reaction kettle, is 90 DEG C in temperature, under the conditions of revolving speed is 180r/min, is stirred
20min, then inert gas is passed through into reaction kettle with 800L/min rate, under inert gas shielding state, into reaction kettle
Sequentially add oxyalkylene and isocyanates, in temperature be 95 DEG C, pressure be 0.6MPa under the conditions of, heat compressive reaction 6h after,
Veneer is taken out, modified veneer is obtained；The modified veneer of gained is impregnated in linseed oil and linoleic acid mixture again, in supersonic frequency
It under the conditions of 50kHz, after ultrasonic immersing 40min, takes out, is 160 DEG C then at temperature, under the conditions of pressure is 15MPa, hot pressing
10min, then through cooled to room temperature, that is, complete the Chemical softnessprocess to timber.The timber is poplar.The enzymolysis liquid
It is to be formulated by the raw material of following parts by weight：200 parts of water, 5 parts of lipase, 4 parts of protease, 5 parts of amylase, 10 parts of phosphorus
Rouge, 0.4 part of calcium chloride.The oxyalkylene is propylene oxide.The isocyanates is toluene di-isocyanate(TDI).The catalyst
For sodium hydroxide.The inert gas is nitrogen.The linseed oil and linoleic acid mixture are by linseed oil and linoleic acid by matter
Amount is than being 10：1 mixes.
Example 3
Timber is cut into the veneer with a thickness of 20mm, then is taken out after veneer is impregnated 8h in water, after draining surface moisture, uses liquid
Chilled nitrogen 40s, then the veneer after freezing is transferred in microwave applicator, under the conditions of microwave power is 300W, defrosting 20min,
Such liquid nitrogen frozen and microwave thawing recycle 10 times, obtain pretreatment veneer；Gained pretreatment veneer is impregnated in enzymolysis liquid, in
Under the conditions of supersonic frequency is 55kHz, taken out after ultrasonic immersing 15min, then the veneer after ultrasonic immersing is transferred in autoclave, in
Temperature be 35 DEG C, pressure be 1.2MPa under the conditions of, taken out after constant temperature pressurized treatments 8h, then at temperature be 65 DEG C under the conditions of, low temperature
Drying to constant weight, obtains enzymatic hydrolysis veneer；According to parts by weight, 200 parts of enzymatic hydrolysis veneers are successively taken, 90 parts of part oxyalkylenes, 60 parts different
Cyanate, 10 parts of catalyst, first will enzymatic hydrolysis veneer and catalyst pour into reaction kettle, in temperature be 90 DEG C, revolving speed 180r/
Under the conditions of min, it is stirred 20min, then inert gas is passed through into reaction kettle with 800L/min rate, in inert gas shielding
Under state, oxyalkylene and isocyanates are sequentially added into reaction kettle, in temperature be 95 DEG C, pressure be 0.6MPa under the conditions of,
After heating compressive reaction 6h, veneer is taken out, modified veneer is obtained；The modified veneer of gained is impregnated in linseed oil again and linoleic acid mixes
It closes in object, under the conditions of supersonic frequency is 50kHz, after ultrasonic immersing 40min, takes out, be 160 DEG C then at temperature, pressure is
Under the conditions of 15MPa, hot pressing 10min, then through cooled to room temperature, that is, complete the Chemical softnessprocess to timber.The timber
For poplar.The enzymolysis liquid is formulated by the raw material of following parts by weight：200 parts of water, 5 parts of lipase, 4 parts of protease, 5
Part amylase.The oxyalkylene is propylene oxide.The isocyanates is toluene di-isocyanate(TDI).The catalyst is hydrogen-oxygen
Change sodium.The inert gas is nitrogen.The linseed oil and linoleic acid mixture are to be in mass ratio by linseed oil and linoleic acid
10：1 mixes.
Example 4
Timber is cut into the veneer with a thickness of 20mm, then is taken out after veneer is impregnated 8h in water, after draining surface moisture, uses liquid
Chilled nitrogen 40s, then the veneer after freezing is transferred in microwave applicator, under the conditions of microwave power is 300W, defrosting 20min,
Such liquid nitrogen frozen and microwave thawing recycle 10 times, obtain pretreatment veneer；According to parts by weight, successively take 200 parts of pretreatments single
Plate, 90 parts of part oxyalkylenes, 60 parts of isocyanates, 10 parts of catalyst first pour into pretreatment veneer and catalyst in reaction kettle,
It is 90 DEG C in temperature, under the conditions of revolving speed is 180r/min, is stirred 20min, then lead into reaction kettle with 800L/min rate
Enter inert gas, under inert gas shielding state, oxyalkylene and isocyanates are sequentially added into reaction kettle, is in temperature
95 DEG C, under the conditions of pressure is 0.6MPa, after heating compressive reaction 6h, veneer is taken out, modified veneer is obtained；It is again that gained is modified single
Plate is impregnated in linseed oil and linoleic acid mixture, under the conditions of supersonic frequency is 50kHz, after ultrasonic immersing 40min, is taken out,
It is 160 DEG C then at temperature, under the conditions of pressure is 15MPa, hot pressing 10min, then through cooled to room temperature, that is, complete to timber
Chemical softnessprocess.The timber is poplar.The enzymolysis liquid is formulated by the raw material of following parts by weight：200 parts of water,
5 parts of lipase, 4 parts of protease, 5 parts of amylase, 10 parts of phosphatide, 0.4 part of calcium chloride.The oxyalkylene is propylene oxide.Institute
Stating isocyanates is toluene di-isocyanate(TDI).The catalyst is sodium hydroxide.The inert gas is nitrogen.The linseed oil
It is by linseed oil and linoleic acid with linoleic acid mixture is in mass ratio 10：1 mixes.
Example 5
Timber is cut into the veneer with a thickness of 20mm, then is taken out after veneer is impregnated 8h in water, after draining surface moisture, uses liquid
Chilled nitrogen 40s, then the veneer after freezing is transferred in microwave applicator, under the conditions of microwave power is 300W, defrosting 20min,
Such liquid nitrogen frozen and microwave thawing recycle 10 times, obtain pretreatment veneer；Gained pretreatment veneer is impregnated in enzymolysis liquid, in
Under the conditions of supersonic frequency is 55kHz, taken out after ultrasonic immersing 15min, then the veneer after ultrasonic immersing is transferred in autoclave, in
Temperature be 35 DEG C, pressure be 1.2MPa under the conditions of, taken out after constant temperature pressurized treatments 8h, then at temperature be 65 DEG C under the conditions of, low temperature
Drying to constant weight, obtains enzymatic hydrolysis veneer；According to parts by weight, 200 parts of enzymatic hydrolysis veneers are successively taken, 90 parts of part oxyalkylenes, 60 parts different
Cyanate, 10 parts of catalyst, first will enzymatic hydrolysis veneer and catalyst pour into reaction kettle, in temperature be 90 DEG C, revolving speed 180r/
Under the conditions of min, it is stirred 20min, then inert gas is passed through into reaction kettle with 800L/min rate, in inert gas shielding
Under state, oxyalkylene and isocyanates are sequentially added into reaction kettle, in temperature be 95 DEG C, pressure be 0.6MPa under the conditions of,
After heating compressive reaction 6h, veneer is taken out, that is, completes the Chemical softnessprocess to timber.The timber is poplar.The enzyme
Solving liquid is formulated by the raw material of following parts by weight：200 parts of water, 5 parts of lipase, 4 parts of protease, 5 parts of amylase, 10 parts
Phosphatide, 0.4 part of calcium chloride.The oxyalkylene is propylene oxide.The isocyanates is toluene di-isocyanate(TDI).The catalysis
Agent is sodium hydroxide.The inert gas is nitrogen.The linseed oil and linoleic acid mixture be by linseed oil and linoleic acid by
Mass ratio is 10：1 mixes.
Comparative example：The timber softening agent of Zhengzhou Chemical Co., Ltd. production.
1 to 5 gained timber of example and comparative example product are subjected to performance detection, the specific detection method is as follows：
The Bending Stability of timber after detecting above-mentioned softening, specific testing result are as shown in table 1：
Table 1：Performance detection table
By 1 testing result of table it is found that the timber that the present invention is handled has excellent mechanical property, flexibility and elasticity.
Claims (10)
1. a kind of wood chemistry sofening treatment method, which is characterized in that specifically processing step is：
（1）Timber is cut into veneer, then is taken out after veneer is soaked in water, is recycled 8~10 times through liquid nitrogen frozen and microwave thawing,
Veneer must be pre-processed；
（2）Pretreatment veneer ultrasonic immersing is taken out after enzymolysis liquid, after 6~8h of constant temperature pressurized treatments, low temperature drying must be digested
Veneer；
（3）According to parts by weight, 100~200 parts of enzymatic hydrolysis veneers, 60~90 parts of part oxyalkylenes, 50~60 parts of isocyanides are successively taken
Acid esters, 8~10 parts of catalyst, first will enzymatic hydrolysis veneer and catalyst mix, under inert gas shielding, be added oxyalkylene and
Veneer is taken out after heating compressive reaction, obtains modified veneer by isocyanates；
（4）After veneer linseed oil and linoleic acid impregnation mixture being modified, hot pressing is cooling, that is, completes soft to the chemistry of timber
Change processing.
2. a kind of wood chemistry sofening treatment method according to claim 1, which is characterized in that step（1）The timber
It is any one in poplar, China fir, willow, oak, Eucalyptus, teak, sour branch wood, rosewood, Door frame, walnut or lignum cinnamomi camphorae
Kind.
3. a kind of wood chemistry sofening treatment method according to claim 1, which is characterized in that step（1）The veneer
For the veneer with a thickness of 1~20mm.
4. a kind of wood chemistry sofening treatment method according to claim 1, which is characterized in that step（1）The liquid nitrogen
Freezing and microwave thawing circulation are：After 20~40s of liquid nitrogen frozen, under the conditions of microwave power is 200~300W, defrosting 10~
20min。
5. a kind of wood chemistry sofening treatment method according to claim 1, which is characterized in that step（2）The enzymatic hydrolysis
Liquid is formulated by the raw material of following parts by weight：100~200 parts of water, 3~5 parts of lipase, 2~4 parts of protease, 3~5
Part amylase, 8~10 parts of phosphatide, 0.2~0.4 part of calcium chloride.
6. a kind of wood chemistry sofening treatment method according to claim 1, which is characterized in that step（3）The oxidation
Alkene is any one in propylene oxide or ethylene oxide.
7. a kind of wood chemistry sofening treatment method according to claim 1, which is characterized in that step（3）The isocyanide
Acid esters is toluene di-isocyanate(TDI), any one in methyl diphenylene diisocyanate or trimethylhexane diisocyanate.
8. a kind of wood chemistry sofening treatment method according to claim 1, which is characterized in that step（3）The catalysis
Agent is any one in sodium hydroxide, potassium hydroxide or lithium hydroxide.
9. a kind of wood chemistry sofening treatment method according to claim 1, which is characterized in that step（3）The inertia
Gas is any one in nitrogen or argon gas.
10. a kind of wood chemistry sofening treatment method according to claim 1, which is characterized in that step（4）Described flax
It is 1 that oil and linoleic acid mixture are by linseed oil and linoleic acid in mass ratio：1~10：1 mixes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110744671A (en) * | 2019-08-15 | 2020-02-04 | 浙江农林大学 | Manufacturing method of light-colored outdoor recombined bamboo wood |
| CN111308057A (en) * | 2019-11-04 | 2020-06-19 | 内蒙古农业大学 | Method for determining wood section processing conditions for veneer cutting and evaluating processing effect |
-
2018
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110744671A (en) * | 2019-08-15 | 2020-02-04 | 浙江农林大学 | Manufacturing method of light-colored outdoor recombined bamboo wood |
| CN111308057A (en) * | 2019-11-04 | 2020-06-19 | 内蒙古农业大学 | Method for determining wood section processing conditions for veneer cutting and evaluating processing effect |
| CN111308057B (en) * | 2019-11-04 | 2022-02-15 | 内蒙古农业大学 | Method for determining wood section processing conditions for veneer cutting and evaluating processing effect |
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