CN111015855A - Method for improving performance of fast-growing wood by using acrylic rosin - Google Patents
Method for improving performance of fast-growing wood by using acrylic rosin Download PDFInfo
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- CN111015855A CN111015855A CN201911000867.6A CN201911000867A CN111015855A CN 111015855 A CN111015855 A CN 111015855A CN 201911000867 A CN201911000867 A CN 201911000867A CN 111015855 A CN111015855 A CN 111015855A
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- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 title claims abstract description 95
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 title claims abstract description 94
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 239000002023 wood Substances 0.000 title claims abstract description 76
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 21
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims abstract description 30
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000005470 impregnation Methods 0.000 claims abstract description 26
- 238000001035 drying Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000007259 addition reaction Methods 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 241000219000 Populus Species 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 22
- 239000000463 material Substances 0.000 abstract description 20
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 abstract description 11
- 238000005452 bending Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 description 9
- 235000019441 ethanol Nutrition 0.000 description 8
- 230000004048 modification Effects 0.000 description 7
- 238000012986 modification Methods 0.000 description 7
- 239000003153 chemical reaction reagent Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000002791 soaking Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 150000004141 diterpene derivatives Chemical group 0.000 description 3
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 229930004069 diterpene Natural products 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
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- 239000000126 substance Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- -1 N-hydroxymethyl amide compound Chemical class 0.000 description 1
- 206010065226 Non-dipping Diseases 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 230000021736 acetylation Effects 0.000 description 1
- 238000006640 acetylation reaction Methods 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- XPFVYQJUAUNWIW-UHFFFAOYSA-N furfuryl alcohol Chemical compound OCC1=CC=CO1 XPFVYQJUAUNWIW-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
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- 235000019786 weight gain Nutrition 0.000 description 1
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Classifications
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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
- 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
- B27K5/04—Combined bleaching or impregnating and drying of wood
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09F—NATURAL RESINS; FRENCH POLISH; DRYING-OILS; OIL DRYING AGENTS, i.e. SICCATIVES; TURPENTINE
- C09F1/00—Obtaining purification, or chemical modification of natural resins, e.g. oleo-resins
- C09F1/04—Chemical modification, e.g. esterification
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Paper (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a method for improving the performance of fast-growing wood by using acrylic rosin, which comprises the steps of dissolving the acrylic rosin in absolute ethyl alcohol after preparing the acrylic rosin, and preparing to obtain an impregnation liquid; then putting the fast-growing wood into the impregnation liquid, and taking out the fast-growing wood after vacuum impregnation and normal-pressure impregnation at room temperature in sequence; and (3) putting the taken fast-growing wood into a drying oven, and drying to obtain the modified fast-growing wood. The acrylic acid rosin is prepared by taking acrylic acid and refined rosin as raw materials and carrying out D-A addition reaction. Because acrylic acid contains carboxyl, acrylic acid rosin contains two carboxyl groups, and the bonding strength of the rosin and wood is improved by increasing the number of the carboxyl groups in the rosin. The acrylic acid rosin modified material prepared by the invention has good water resistance, the static bending strength, the elastic modulus and the compressive strength of the acrylic acid rosin modified material are obviously improved, and the acrylic acid rosin modified material has good mechanical properties, so that the fast growing wood is limited and weakened in application; the invention explores a new way for the high-value utilization of the rosin, improves the added value of the rosin and has environmental friendliness.
Description
Technical Field
The invention belongs to the field of wood modification, and particularly relates to a method for improving the performance of fast-growing wood by using acrylic rosin.
Background
As a natural renewable material, wood is widely applied to the fields of outdoor construction, indoor decoration, paper making and the like due to the specific high strength-weight ratio and the characteristic of easy processing. However, high quality wood is facing the problem of insufficient supply due to low global growth rate of wood and stricter environmental regulations. The artificial fast-growing forest has fast growth performance, and the wood resource utilization in China mainly uses natural forests to turn to artificial fast-growing forests. The fast growing poplar has short growth period and strong adaptability, is very popular in paper pulp, paper making and veneer industries, and is the first choice of fast growing and high yield tree species in China. However, fast-growing wood generally has disadvantages of poor mechanical strength, poor dimensional stability, high hygroscopicity, and the like, so that the application of the fast-growing wood is limited, and the phenomenon of the fast-growing wood is particularly obvious. Therefore, modification of fast-growing wood becomes necessary.
At present, two main modes of dipping treatment and non-dipping treatment are mainly adopted for modifying the fast-growing poplar. Chemical modifiers for the modification of fast-growing wood are: thermosetting resin, organic monomer, paraffin, acetylation reagent, furfuryl alcohol resin and N-hydroxymethyl amide compound. However, the water resistance and the mechanical property of the fast-growing wood are improved, and the problems of high treatment temperature, easy loss, slow release of harmful substances and the like of the modifier still exist. The mechanical strength of the wood is reduced due to the structural damage of the wood and the thermal degradation reaction of cellulose, hemicellulose and lignin in the processes of compaction treatment, high-temperature heat treatment and the like. Therefore, the method for modifying the carbon fiber at the medium and low temperature range is environment-friendly and has great practical significance.
Rosin is a natural renewable resource abundant in China, the main component of the rosin is resin acid, the rosin is a tricyclic diterpene structure natural product, and the rosin has the characteristics of high crystallinity, large molecular weight and high melting point; the unique rigid structure of the tricyclic diterpene enables the tricyclic diterpene to have the advantages of high hardness and good hydrophobicity. The method is widely applied to the production of paper making, printing ink, adhesives, coatings, soaps, medicines, pesticides and the like. The rosin with high hardness and good hydrophobicity is applied to the field of wood modification, and the wood with certain hydrophobicity and mechanical properties has great research significance. However, although natural rosin has certain rigidity and hydrophobicity, its binding ability with wood is insufficient, so that its application in the wood field is limited.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide a method for improving the performance of fast-growing wood by using acrylic rosin. According to the invention, the acrylic acid rosin is prepared by mixing acrylic acid with rosin and carrying out D-A addition reaction by utilizing the structural characteristics of double bonds and carboxyl in the acrylic acid, and the bonding strength of the rosin and wood is improved and the performance of the wood is improved by increasing the number of carboxyl in the rosin.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for improving the performance of fast-growing wood by using acrylic rosin is characterized by comprising the following steps: the method comprises the following steps:
(1) preparing acrylic rosin, dissolving the acrylic rosin in absolute ethyl alcohol, and preparing to obtain an impregnation liquid; the mass concentration of the acrylic acid rosin in the impregnation liquid is 15-25%; the acrylic rosin is prepared by taking acrylic acid and refined rosin as raw materials through a D-A addition reaction, the main component of the acrylic rosin is acrylpimaric acid, and the molecular structural formula is as follows:
(2) putting the fast-growing wood into the impregnation liquid, and taking out the fast-growing wood after vacuum impregnation and normal-temperature and normal-pressure impregnation in sequence; preferably, the fast-growing wood is poplar. The vacuum degree of the vacuum impregnation is 0.08-0.1 Mpa, and the time is 20-60 min; the time for normal pressure impregnation at room temperature (20-27 ℃) is 20-28 h; further preferably, the vacuum degree of vacuum impregnation can be 0.08MPa, 0.09MPa or 0.1MPa, and the impregnation time can be 20min,30min, 40min, 50min or 60 min; the soaking time at room temperature and normal pressure can be 20h,21h,22h,23h,24h,25h,26h,27h or 28 h.
(3) And (3) putting the fast-growing wood taken out in the step (2) into an oven, firstly, drying for 4-6 hours at 40-60 ℃ to volatilize ethanol, then heating to 100-110 ℃, and continuously drying for 10-14 hours to obtain the modified fast-growing wood. Further preferably, the drying temperature of the previous stage can be 40 ℃, 45 ℃, 50 ℃, 55 ℃ or 60 ℃, and the time can be 4h, 4.5h, 5h, 5.5h or 6 h; the drying temperature of the later stage can be 100 ℃, 101 ℃, 102 ℃, 103 ℃, 104 ℃, 105 ℃, 106 ℃, 107 ℃, 108 ℃, 109 ℃ or 110 ℃, and the drying time can be 10h, 11h, 12h, 13h or 14 h.
Another object of the present invention is to provide modified fast-growing wood prepared by the above method.
The invention obtains the following technical effects:
(1) the acrylic acid rosin is prepared by taking acrylic acid and refined rosin as raw materials and carrying out D-A addition reaction. Because acrylic acid contains carboxyl, the acrylic acid rosin product contains two carboxyl groups, and the bonding strength of the rosin and wood is improved by increasing the number of the carboxyl groups in the rosin. Then the modified fast-growing wood is obtained through simple dipping and drying treatment, the preparation method is simple, the production cost is low, and the method has an industrial application prospect; the rosin is a green renewable resource, and the invention explores a new way for high-value utilization of the rosin, greatly improves the added value of the rosin and has environmental friendliness.
(2) Through the impregnation modification treatment of the acrylic rosin, the water absorption rate of the wood is effectively reduced, the water penetration is hindered, and the water resistance of the wood is improved; meanwhile, the static bending strength, the elastic modulus and the compressive strength of the acrylic acid rosin modified material are all obviously improved, and the acrylic acid rosin modified material has good mechanical properties; so that the wood is limitedly weakened in the application.
Drawings
Fig. 1 is a graph of water absorption of wood samples.
Detailed Description
The present invention will be further described with reference to the following examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following examples, the types and suppliers of the reagents used were as follows: refined rosin (Refinked rosin-RR) and Polymerized rosin (Polymerized rosin-PR) were purchased from West chemical Co., Ltd, Guangdong. The reagents are provided only for illustrating the sources and components of the reagents used in the experiments of the present invention, so as to be fully disclosed, and do not indicate that the present invention cannot be realized by using other reagents of the same type or other reagents supplied by other suppliers.
Example 1
Preparation of acrylic rosin: adding 585g of refined rosin and 3.57g of hydroquinone (polymerization inhibitor) into a four-neck flask, introducing nitrogen, stirring, heating to 100 ℃, heating to 180 ℃ after the refined rosin is completely dissolved and softened, and stabilizing for 30 min. Then 130g of acrylic acid (the mass ratio of the acrylic acid to the refined rosin is 4.5:1) is added dropwise within 30min, the temperature is maintained at 180 ℃, the temperature is raised to 200 ℃ after 1h, and the mixture is stabilized for 2 h. And (3) heating to 230 ℃ before the reaction is finished, increasing the nitrogen flow rate, taking down the condenser tube, devolatilizing for 10min, removing unreacted acrylic acid, cooling to about 150 ℃, and discharging to obtain the acrylic rosin. The main component of the obtained acrylic rosin is acrylpimaric acid, and the molecular structural formula is as follows:
example 2
Randomly selecting 20 × 20 × 20mm without damage3The fast-growing poplar wood block is dried to constant weight at 105 ℃, and the weight and the size of the wood block are measured. 180g of acrylic acid rosin is weighed and dissolved in 720g of absolute ethyl alcohol to prepare 20% acrylic acid rosin ethanol solution as impregnation liquid. Soaking fast-growing wood in the above soaking solution at vacuum degree of 0.095MPa for 30min, soaking at room temperature (25 deg.C) under normal pressure for 24 hr, filtering, drying in oven at 60 deg.C for 4 hr to volatilize ethanol, and heating to high temperatureDrying at 105 deg.C for 12h to obtain acrylic acid rosin modified material (AACMWS). The weight and size thereof were measured. Through modification, the density of the acrylic rosin modified material is increased by 27.55%, and the weight gain (WPG) is 30.79%, which indicates that the acrylic rosin is successfully deposited in wood.
Comparative example 1
The same procedure as in example 2 was conducted, except that an equal amount of the absolute ethanol solution was used as the impregnation liquid in place of the acrylic rosin ethanol solution. The prepared wood sample was designated as a blank Control (CWS).
Comparative example 2
The same operation as in example 2 was carried out, except that an ethanol solution of purified rosin having a mass concentration of 20% was used as the impregnation liquid in place of the acrylic rosin ethanol solution. The prepared wood sample is marked as a refined rosin modified wood (RRCWS).
Comparative example 3
The same operation as in example 2 was carried out, except that an ethanol solution of polymerized rosin having a mass concentration of 20% was used as the impregnation liquid in place of the ethanol solution of acrylic rosin. The prepared wood sample was designated as a polymerized rosin modified wood (PRCWS).
Detection and analysis
To investigate the water resistance of fast-growing poplar after treatment with acrylic rosin, the wood samples prepared in example 2 and comparative examples 1 to 3 were immersed in deionized water at room temperature, and the mass of the wood samples was measured after different time intervals. WU (water absorption) is calculated according to the following formula, wherein: w1Weight of wood sample before impregnation, W2Is the total weight of the wood sample after immersion in deionized water for various time intervals.
WU％＝(W2-W1)/W1×100
Water absorption data for wood samples as shown in fig. 1, it can be seen from fig. 1 that the water absorption of each wood sample increases with time, since more water penetrates into the wood internal cell voids and capillaries as the soaking time increases, until equilibrium is reached. After 12 days of immersion, the water absorption of the blank control material was maximum, 186.28%; the water absorption rate of the refined rosin modified material and the polymerized rosin modified material is reduced; the acrylic acid rosin modified material had the minimum water absorption of 79.68%. The water resistance of wood can be improved to a certain degree by using refined rosin and polymerized rosin, but the water resistance of wood modified by acrylic acid rosin is better. The reason why the acrylic rosin modified material has the best water resistance is that the acrylic rosin contains 2 carboxyl groups, and the acrylic rosin has stronger hydrogen bonding action with hydroxyl groups in wood, so that the water absorption rate of the wood is effectively reduced, the water permeation is hindered, and the water resistance of the wood is improved.
In order to research the mechanical properties of the fast-growing poplar treated by the acrylic acid rosin, the static bending strength (MOR), the elastic Modulus (MOE) and the Compressive Strength (CS) of all wood samples are detected according to GB/T1936.2-2009 and GB/T1939-2009. The results are shown in table 2:
TABLE 2 mechanical Properties of the Wood samples
As can be seen from Table 2, the values of MOR, MOE and CS of the acrylic rosin modified material are the largest, and compared with a blank control material, the MOR, MOE and CS of the acrylic rosin modified material are respectively increased by 18.09%, 27.51% and 17.85%, which shows that the performance of the fast-growing wood is remarkably improved by the modification of the acrylic rosin. It can be seen from table 2 that the polymerized rosin modified material obtained by modifying polymerized rosin also has better performance because the molecular structure of polymerized rosin is similar to that of acrylic rosin and contains 2 carboxyl groups, and the more carboxyl groups make the polymerized rosin modified material have stronger hydrogen bonding with hydroxyl groups in wood. The reason why the acrylic rosin modified material has better performance than the polymerized rosin modified material is that the acrylic rosin has smaller molecular weight and is easier to be immersed into wood cells compared with the polymerized rosin, so that better improvement effect is achieved.
Claims (7)
1. A method for improving the performance of fast-growing wood by using acrylic rosin is characterized by comprising the following steps: the method comprises the following steps:
(1) preparing acrylic rosin, dissolving the acrylic rosin in absolute ethyl alcohol, and preparing to obtain an impregnation liquid;
(2) putting the fast-growing wood into the impregnation liquid, and taking out the fast-growing wood after vacuum impregnation and normal-temperature and normal-pressure impregnation in sequence;
(3) and (3) putting the fast-growing wood taken out in the step (2) into an oven, and drying to obtain the modified fast-growing wood.
2. The method of claim 1, wherein: in the step (1), the acrylic acid rosin is prepared by taking acrylic acid and refined rosin as raw materials and carrying out D-A addition reaction.
3. The method of claim 1, wherein: in the step (1), the mass concentration of the acrylic acid rosin in the impregnation liquid is 15-25%.
4. The method of claim 1, wherein: in the step (2), the vacuum degree of vacuum impregnation is 0.08-0.1 Mpa, and the time is 20-60 min; and the room-temperature normal-pressure impregnation time is 20-28 h.
5. The method of claim 1, wherein: in the step (2), the fast growing wood is poplar.
6. The method of claim 1, wherein: in the step (3), the drying treatment is divided into two steps, and the drying treatment is firstly carried out for 4-6 hours at the temperature of 40-60 ℃ and then is carried out for 10-14 hours at the temperature of 100-110 ℃.
7. A modified fast-growing wood when produced by the process as claimed in any one of claims 1 to 6.
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|---|---|---|---|---|
| US20050136278A1 (en) * | 2003-12-17 | 2005-06-23 | Hutter G. F. | Method for making artificial pine heartwood |
| CN101591238A (en) * | 2009-06-19 | 2009-12-02 | 中国林业科学研究院林产化学工业研究所 | The preparation method of rosin acrylic acid |
| CN109352776A (en) * | 2018-11-13 | 2019-02-19 | 中国林业科学研究院林产化学工业研究所 | A kind of method that abietyl unsaturated-resin improves fast growing wood performance |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050136278A1 (en) * | 2003-12-17 | 2005-06-23 | Hutter G. F. | Method for making artificial pine heartwood |
| CN101591238A (en) * | 2009-06-19 | 2009-12-02 | 中国林业科学研究院林产化学工业研究所 | The preparation method of rosin acrylic acid |
| CN109352776A (en) * | 2018-11-13 | 2019-02-19 | 中国林业科学研究院林产化学工业研究所 | A kind of method that abietyl unsaturated-resin improves fast growing wood performance |
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