CN110421669A - A kind of method of montmorillonite Composite industrial lignin improved wood - Google Patents
A kind of method of montmorillonite Composite industrial lignin improved wood Download PDFInfo
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- CN110421669A CN110421669A CN201910644853.1A CN201910644853A CN110421669A CN 110421669 A CN110421669 A CN 110421669A CN 201910644853 A CN201910644853 A CN 201910644853A CN 110421669 A CN110421669 A CN 110421669A
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- Prior art keywords
- montmorillonite
- industrial lignin
- wood
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- lignin
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Classifications
-
- 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
- B27K3/025—Controlling the process
-
- 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
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
-
- 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
- B27K2240/00—Purpose of the treatment
- B27K2240/70—Hydrophobation treatment
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The present invention relates to a kind of methods of industrial lignin composite montmorillonoid improved wood, and the object of the present invention is to provide a kind of natural greens, the extensive Wood modifier of raw material sources, preferably to promote the waterproofness and dimensional stability of timber.The present invention carries out two steps to timber as modifying agent using montmorillonite and industrial lignin and is modified, wood dimensional stability can effectively be promoted, simultaneously, waste liquid of the industrial lignin in pulping and papermaking processes, is often discharged as waste material, be easy to cause environmental pollution, the present invention recycles the industrial lignin in waste liquid again, the development of industry efficient green is pushed to be of great significance for realizing the higher value application of waste resource applied to Wooden modifying.
Description
Technical field
The present invention relates to the technical field of Wooden modifying more particularly to a kind of montmorillonite Composite industrial lignin improved woods
Method.
Background technique
A kind of recyclable materials of the timber as green natural have many advantages, such as that easy to process, the ratio of strength to weight is high, are widely applied
In the daily production and life of people.But timber is a kind of porous hygroscopic materials, in the process of processing and using, pole
Warpage, cracking equidimension stability problem easily occurs, reduces its service life and utilization rate.Therefore, to timber, especially artificial forest
Fast growing wood is modified processing, promotes its waterproofness and dimensional stability is most important.This leads for widening the application of fast growing wood
The efficient utilization of forest tree resource is realized in domain, breaks through the industry development bottleneck of timber resources supply constant tension, great strategic importance
With realistic price.
Some Wood modifiers in the prior art are at high price, and meeting residual volatile species, cause environment after use
Pollution, is detrimental to health, and some Wood modifier raw materials are non-renewable resources, can not achieve sustainable development.It is existing
Have also commonly using montmorillonite as modifying agent in technology, montmorillonite is a kind of silicate-type material modification agent, still, day
Right montmorillonite dispersibility is lower, and effect is undesirable in actual application, needs to be modified it processing.It will naturally cover de-
After soil is modified as organo montmorillonite, waterproofing wood and dimensional stability can be promoted, mostly uses double decyl dimethyl chlorine greatly at present
Change ammonium etc. to be modified it, but effect is still limited.
Summary of the invention
Based on the above issues, the object of the present invention is to provide a kind of natural green, the extensive Wood modifier of raw material sources,
Preferably to promote the waterproofness and dimensional stability of timber.The present invention is using montmorillonite and industrial lignin as modifying agent pair
Timber carries out two steps and is modified, and can effectively promote wood dimensional stability, meanwhile, industrial lignin is in pulping and papermaking processes
Waste liquid, be often discharged as waste material, be easy to cause environmental pollution, the industrial lignin in waste liquid is recycled benefit by the present invention again
With applied to Wooden modifying, for realizing the higher value application of waste resource, pushing industry efficient green to develop has important meaning
Justice.
The present invention provides a kind of method of montmorillonite Composite industrial lignin improved wood, and specific technical solution is as follows: packet
Include following steps: step 1. prepares montmorillonite Wood modifier；
Step 2. carries out Immersion treatment to timber using the montmorillonite Wood modifier that step 1 obtains, and obtains montmorillonite and changes
Property material；
Step 3. prepares industrial lignin modifying agent；
The industrial lignin modifying agent that step 4. is obtained using step 3 soaks the imvite modified material that step 2 obtains
Note processing, obtains montmorillonite Composite industrial lignin improved wood.
Preferably, the montmorillonite Wood modifier in step 1, is made by the component of following parts by weight: montmorillonite 1~20
Part, 1~8 part of the polyvinyl alcohol that 1~76 part of quaternary ammonium salt surface active agent, the degree of polymerization are 500~5000,12~100 parts of ethyl alcohol
And 32~196 parts of deionized water.
Preferably, the montmorillonite Wood modifier, is made by the component of following parts by weight: 2~10 parts of montmorillonite, quaternary ammonium
4~10 parts of type surfactant, 2~10 parts of the polyvinyl alcohol that the degree of polymerization is 500~2000,25~100 parts of ethyl alcohol, deionization
65~150 parts of water.
Preferably, the montmorillonite is natural hydrophilic montmorillonite, including but not limited to sodium-based montmorillonite, calcium Ji Mengtuo
Soil, further preferably sodium-based montmorillonite.
Preferably, the quaternary ammonium salt surface active agent is selected from cetyl trimethylammonium bromide, double dimethyls
The one or more of ammonium chloride, decyl dimethyl benzyl ammonium chloride.
Preferably, the industrial lignin modifying agent in step 3, is made by the component of following parts by weight: industrial lignin 2~
20 parts, 98~380 parts of 25% ethanol solution.
Preferably, the industrial lignin modifying agent in step 3, is made by the component of following parts by weight: industrial lignin 2~
10 parts, 200~300 parts of 25% ethanol solution.
Preferably, the industrial lignin is that plant fiber material is degraded the lignin of dissolution in pulping process, including
Alkali lignin, black liquid, lignosulfonates, preferably alkali lignin.
Preferably, the montmorillonite Wood modifier in step 1 is by montmorillonite, quaternary ammonium salt surface active agent, polyethylene
Alcohol, ethyl alcohol, deionized water mixing.Mixture is put into beaker and is stirred, is put into ultrasonic oscillation instrument, In after mixing evenly
Ultrasonication is used under the conditions of 100Hz, obtains montmorillonite Wood modifier.
Preferably, ultrasonic treatment time is 20~300min, preferably 60~90min.
Preferably, in the step 2 and step 4 timber using vacuum-impregnating by pressure processing, Immersion treatment method are as follows:
S1. timber is placed in immersion can and is vacuum-treated, vacuum degree is -0.6~-1.0MPa, and the processing time is 25
~35min；
S2. after the above-mentioned modifying agent being prepared being added to impregnating autoclave, the pressure maintaining under the pressure condition of 0.3~0.8MPa
30~240min；
S3. unload and extrude tank and complete treatment process, take out test material, after being placed in gas at room temperature dry 3 days, be placed in oven and dried to
Constant weight.
Above-mentioned technical proposal the utility model has the advantages that
1. the present invention is using montmorillonite and industrial lignin as Wood modifier, low in cost, environmentally protective, by waste liquid
In industrial lignin recycle again, be applied to Wooden modifying, reduce the pollution of pulping and paper-making waste liquid, can effectively push
The recycling of pulping and paper-making waste liquid pushes the development of industry efficient green to have weight for realizing the higher value application of waste resource
Want meaning.
2. the present invention is realized using two-step method and is modified, is entering industrial lignin between montmorillonite layer in timber, use
With modified montmorillonoid, intercalation is carried out to montmorillonite, is even up to the effect for removing it to promote the interlamellar spacing of montmorillonite, thus
Realize the modification on cell wall scale；Meanwhile industrial lignin also has certain hydrophobicity, and promotion can be cooperateed with montmorillonite
The dimensional stability of timber.
Figure of description
The X ray diffracting spectrum of Fig. 1 sodium-based montmorillonite, embodiment 1-2 and comparative example
Specific embodiment
Below with reference to embodiment and in conjunction with attached drawing, the present invention will be described in detail.Material as used in the following examples, examination
Agent etc., is commercially available.The present invention provides six groups of embodiments and one group of comparative example, is all made of in six groups of embodiments full
Cell method carries out vacuum-impregnating by pressure processing, but every group imvite modified dose and industrial lignin to embodiment timber in two steps
The preparation of modifying agent is different.
Following example 1-embodiment 6 is all made of following full-cell process and carries out vacuum-pressurization to embodiment timber in two steps
Impregnation:
Step 1: timber is placed in immersion can, be vacuum-treated, relative degree of vacuum be -0.1MPa, processing the time be
30min；It is added imvite modified dose, in relative pressure to carry out pressurized treatments under conditions of 0.5MPa, the processing time is
60min；After treatment takes out timber, obtains imvite modified material, is placed in after spontaneously drying 3 days in air at room temperature,
It dries under conditions of 103 DEG C to over dry.
Step 2: imvite modified material made from the first step is taken to be vacuum-treated in immersion can, relative degree of vacuum
For -0.1MPa, the processing time is 30min；Industrial lignin modifying agent is added, is carried out under conditions of relative pressure is 0.5MPa
Pressurized treatments, processing time are 60min；After treatment takes out timber, and it is modified to obtain montmorillonite Composite industrial lignin
Material is placed in after spontaneously drying 3 days in air at room temperature, is dried under conditions of 103 DEG C to over dry.
Embodiment 1
Imvite modified dose of preparation: 1 part of sodium-based montmorillonite, 4 parts of cetyl trimethylammonium bromides, 1 part of degree of polymerization are taken
It is put into beaker and stirs for 1000 polyvinyl alcohol (PVA), 12 parts of ethyl alcohol, 32 parts of deionized waters, be put into ultrasound after mixing evenly
Wave concussion instrument uses ultrasonication 30min under the conditions of 100Hz, obtains imvite modified dose that mass fraction is 2%.
The preparation of industrial lignin modifying agent: the ethanol solution that 2 parts of black liquids, 98 parts of mass fractions are 25% is taken, is put
Enter in beaker and be uniformly mixed, obtains the industrial lignin modifying agent that mass fraction is 2%.
The montmorillonite that embodiment 1 is prepared using imvite modified dose of above-mentioned preparation and industrial lignin modifying agent is multiple
Close the standard specimen of the various sizes of industrial lignin improved wood.
Embodiment 2
Imvite modified dose of preparation: 4 parts of sodium-based montmorillonites, 15 parts of double dodecane alkyl dimethyl ammonium chlorides, 4 parts of degree of polymerization are taken
It is put into beaker and stirs for 500 PVA, 50 parts of ethyl alcohol, 127 parts of deionized waters, be put into ultrasonic oscillation instrument, In after mixing evenly
Ultrasonication 30min is used under the conditions of 100Hz, obtains imvite modified dose that mass fraction is 2%.
The preparation of industrial lignin modifying agent: the ethanol solution that 4 parts of alkali lignins, 96 parts of mass fractions are 25% is taken, is put
Enter in beaker and be uniformly mixed, obtains the industrial lignin modifying agent that mass fraction is 4%.
The montmorillonite that embodiment 2 is prepared using imvite modified dose of above-mentioned preparation and industrial lignin modifying agent is multiple
Close the standard specimen of the various sizes of industrial lignin improved wood.
Embodiment 3
Imvite modified dose of preparation: 6 parts of sodium-based montmorillonites, 23 parts of decyl dimethyl benzyl ammonium chlorides, 4 parts of degree of polymerization are taken
It is put into beaker and stirs for 2000 PVA, 50 parts of ethyl alcohol, 117 parts of deionized waters, be put into ultrasonic oscillation instrument after mixing evenly,
Ultrasonication 30min is used under the conditions of 100Hz, obtains imvite modified dose that mass fraction is 3%.
The preparation of industrial lignin modifying agent: the ethanol solution that 3 parts of alkali lignins, 97 parts of mass fractions are 25% is taken, is put
Enter in beaker and be uniformly mixed, obtains the industrial lignin modifying agent that mass fraction is 3%.
The montmorillonite that embodiment 3 is prepared using imvite modified dose of above-mentioned preparation and industrial lignin modifying agent is multiple
Close the standard specimen of the various sizes of industrial lignin improved wood.
Embodiment 4
Imvite modified dose of preparation: 8 parts of calcium-base montmorillonites, 30 parts of cetyl trimethylammonium bromides, 4 parts of degree of polymerization are taken
It is put into beaker and stirs for 3000 PVA, 50 parts of ethyl alcohol, 108 parts of deionized waters, be put into ultrasonic oscillation instrument after mixing evenly,
Ultrasonication 30min is used under the conditions of 100Hz, obtains imvite modified dose that mass fraction is 4%.
The preparation of industrial lignin modifying agent: the ethanol solution that 2 parts of alkali lignins, 98 parts of mass fractions are 25% is taken, is put
Enter in beaker and be uniformly mixed, obtains the industrial lignin modifying agent that mass fraction is 2%.
The montmorillonite that embodiment 4 is prepared using imvite modified dose of above-mentioned preparation and industrial lignin modifying agent is multiple
Close the standard specimen of the various sizes of industrial lignin improved wood.
Embodiment 5
Imvite modified dose of preparation: 8 parts of calcium-base montmorillonites, 15 parts of cetyl trimethylammonium bromides, 15 parts of decyls are taken
Dimethyl benzyl ammonium chloride, 4 parts of degree of polymerization are put into beaker and stir for 4000 PVA, 50 parts of ethyl alcohol, 108 parts of deionized waters, stir
It is put into ultrasonic oscillation instrument after mixing uniformly, ultrasonication 30min is used under the conditions of 100Hz, obtains the illiteracy that mass fraction is 4%
De- soil modifying agent.
The preparation of industrial lignin modifying agent: take the ethyl alcohol that 12 parts of lignosulfonates, 288 parts of mass fractions are 25% molten
Liquid is put into beaker and is uniformly mixed, and obtains the industrial lignin modifying agent that mass fraction is 4%.
The montmorillonite that embodiment 5 is prepared using imvite modified dose of above-mentioned preparation and industrial lignin modifying agent is multiple
Close the standard specimen of the various sizes of industrial lignin improved wood.
Embodiment 6
Imvite modified dose of preparation: 20 parts of calcium-base montmorillonites, 38 parts of double dodecyl dimethyl ammonium chlorides, 38 parts of last of the ten Heavenly stems are taken
Base dimethyl benzyl ammonium chloride, 8 parts of degree of polymerization are put into beaker and stir for 5000 PVA, 100 parts of ethyl alcohol, 196 parts of deionized waters
It mixes, is put into ultrasonic oscillation instrument after mixing evenly, ultrasonication 30min is used under the conditions of 100Hz, obtaining mass fraction is
Imvite modified dose of 5%.
The preparation of industrial lignin modifying agent: take the ethyl alcohol that 20 parts of lignosulfonates, 380 parts of mass fractions are 25% molten
Liquid is put into beaker and is uniformly mixed, and obtains the industrial lignin modifying agent that mass fraction is 5%.
The illiteracy that embodiment 6 is prepared using organic imvite modified dose of above-mentioned preparation and industrial lignin modifying agent is de-
The standard specimen of the various sizes of native composite industrial lignin modification timber.
Comparative example
Unseasoned timber is dried under the conditions of 103 DEG C to the standard of wood test specimen of over dry.
It after obtaining above-mentioned seven kinds of standard specimens, is tested using seven kinds of standard specimens, performance survey is carried out to standard specimen
Examination.
Test a cheating engaging layer spacing
Sodium-based montmorillonite (Na-MMT), embodiment 1-2 and comparative example are characterized using X-ray diffractometer, montmorillonite
001 interplanar distance that interlamellar spacing mainly passes through montmorillonite layer in X-ray diffraction (XRD) map determines.As a result as shown in Figure 1.
The result shows that: the characteristic peak of montmorillonite is concentrated mainly within 10 °, after industrial lignin second step dipping,
Montmorillonite (001) diffraction maximum of modified material almost disappears, according to the scanning electron microscope of the embodiment 2 of the upper right corner Fig. 1 insertion
(SEM) interlamellar spacing of montmorillonite known to figure has reached 0.88 μm, it was demonstrated that montmorillonite can be removed by industrial lignin.
Test the water imbibition of two improved woods
It is absorbed water according to the standard specimen that embodiment 1-6, comparative example is prepared in national standard GB/T 1934.1-2009
Property test, each test material water suction rate of body weight gain changes with time, and the results are shown in Table 1.
The result shows that: the water suction rate of body weight gain of montmorillonite Composite industrial lignin processing material is not lower than as can be seen from Table 1
Material is handled, the waterproofness of montmorillonite Composite industrial lignin processing material is effectively promoted.
Water suction rate of body weight gain of the 1 each group test material of table in water absorption course
Test three dimensional stability tests
The moisture absorption of embodiment 1-6, the standard specimen that comparative example is prepared are measured according to national standard GB/T 1934.2-2009
With water suction volume expansion rate, the results are shown in Table 2.
The result shows that: as shown in table 2, montmorillonite Composite industrial lignin handles material cubical expansivity and is lower than untreated material,
The processing of montmorillonite Composite industrial lignin can effectively promote the dimensional stability of timber.
2 each group test material moisture absorption cubical expansivity of table and water suction volume expansion rate
Test four parallel-to-grain compressive strengths
It is anti-that embodiment 1-6, the rift grain for the standard specimen that comparative example is prepared are measured according to national standard GB/T 1935-2009
Compressive Strength, the results are shown in Table 3.
The result shows that: montmorillonite Composite industrial lignin processing material parallel-to-grain compressive strength is higher than not as can be seen from Table 3
Material is handled, and as montmorillonite and industrial lignin concentration increase, parallel-to-grain compressive strength is higher.Montmorillonite Composite industrial lignin
Processing can effectively promote the mechanical property of timber.
The parallel-to-grain compressive strength of 3 each group test material of table
Claims (9)
1. a kind of method of montmorillonite Composite industrial lignin improved wood, which comprises the following steps:
Step 1. prepares montmorillonite Wood modifier；
Step 2. carries out Immersion treatment to timber using the montmorillonite Wood modifier that step 1 obtains, and obtains imvite modified material；
Step 3. prepares industrial lignin modifying agent；
The industrial lignin modifying agent that step 4. is obtained using step 3 carries out impregnating place to the imvite modified material that step 2 obtains
Reason, obtains montmorillonite Composite industrial lignin improved wood.
A kind of montmorillonite 2. method of montmorillonite Composite industrial lignin improved wood as described in claim 1, in step 1
Wood modifier is made by the component of following parts by weight: 1~20 part of montmorillonite, gathers 1~76 part of quaternary ammonium salt surface active agent
Right 1~8 part of polyvinyl alcohol for being 500~5000,12~100 parts of ethyl alcohol and 32~196 parts of deionized water.
3. a kind of method of montmorillonite Composite industrial lignin improved wood as claimed in claim 2, the montmorillonite is day
Right hydrophily montmorillonite, including sodium-based montmorillonite, calcium-base montmorillonite, further preferably sodium-based montmorillonite.
4. a kind of method of montmorillonite Composite industrial lignin improved wood as claimed in claim 2, the quaternary ammonium salt table
Face activating agent is selected from cetyl trimethylammonium bromide, double dodecyl dimethyl ammonium chlorides, decyl dimethyl benzyl ammonium chloride
One or more.
A kind of industry wood 5. method of montmorillonite Composite industrial lignin improved wood as described in claim 1, in step 3
Quality modifying agent is made by the component of following parts by weight: 2~20 parts of industrial lignin, 98~380 parts of 25% ethanol solution.
6. a kind of method of montmorillonite Composite industrial lignin improved wood as claimed in claim 5, the industrial lignin
It is that plant fiber material is degraded the lignin of dissolution, including alkali lignin, black liquid, lignin sulfonic acid in pulping process
Salt, preferably alkali lignin.
A kind of montmorillonite 7. method of montmorillonite Composite industrial lignin improved wood as described in claim 1, in step 1
The preparation method of Wood modifier is: montmorillonite, quaternary ammonium salt surface active agent, polyvinyl alcohol, ethyl alcohol, deionized water are mixed
It closes, mixture is put into beaker and is stirred, is put into ultrasonic oscillation instrument after mixing evenly, at ultrasonic wave under the conditions of 100Hz
Reason, obtains montmorillonite Wood modifier.
8. a kind of method of montmorillonite Composite industrial lignin improved wood as claimed in claim 7, ultrasonic treatment time
For 20~300min, preferably 60~90min.
9. a kind of method of montmorillonite Composite industrial lignin improved wood as described in claim 1, the step 2 and step
Timber is using vacuum-impregnating by pressure processing, Immersion treatment method in 4 are as follows:
S1. timber is placed in immersion can and is vacuum-treated, vacuum degree be -0.6~-1.0MPa, processing the time be 25~
35min；
S2. the above-mentioned modifying agent being prepared is impregnated in impregnating autoclave after beaker, is protected under the pressure condition of 0.3~0.8MPa
Press 30~240min；
S3. it unloads and extrudes tank completion treatment process, take out test material, be placed in after spontaneously drying 3 days in air at room temperature, be put into baking oven
Middle drying is to constant weight.
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| CN201910644853.1A CN110421669A (en) | 2019-07-17 | 2019-07-17 | A kind of method of montmorillonite Composite industrial lignin improved wood |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110936454A (en) * | 2019-11-13 | 2020-03-31 | 北京林业大学 | Pyrolysis oil immersion liquid and method for enhancing wood rotary friction welding joint |
| CN114043589A (en) * | 2021-12-01 | 2022-02-15 | 北京林业大学 | Method for applying modified industrial alkali lignin to wood heat treatment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012040910A1 (en) * | 2010-09-28 | 2012-04-05 | 北京林业大学 | Wood modifier, preparation method thereof and method for modifying wood using the same |
| CN105646942A (en) * | 2016-03-04 | 2016-06-08 | 华南理工大学 | Phyllosilicate stripped by lignin derivatives and preparation method of phyllosilicate |
-
2019
- 2019-07-17 CN CN201910644853.1A patent/CN110421669A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012040910A1 (en) * | 2010-09-28 | 2012-04-05 | 北京林业大学 | Wood modifier, preparation method thereof and method for modifying wood using the same |
| CN105646942A (en) * | 2016-03-04 | 2016-06-08 | 华南理工大学 | Phyllosilicate stripped by lignin derivatives and preparation method of phyllosilicate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110936454A (en) * | 2019-11-13 | 2020-03-31 | 北京林业大学 | Pyrolysis oil immersion liquid and method for enhancing wood rotary friction welding joint |
| CN114043589A (en) * | 2021-12-01 | 2022-02-15 | 北京林业大学 | Method for applying modified industrial alkali lignin to wood heat treatment |
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