CN105690516A - Overall hydrophobic timber and preparation method thereof - Google Patents
Overall hydrophobic timber and preparation method thereof Download PDFInfo
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- CN105690516A CN105690516A CN201610077392.0A CN201610077392A CN105690516A CN 105690516 A CN105690516 A CN 105690516A CN 201610077392 A CN201610077392 A CN 201610077392A CN 105690516 A CN105690516 A CN 105690516A
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- 230000002209 hydrophobic effect Effects 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000011259 mixed solution Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 27
- -1 alkyl isocyanate Chemical class 0.000 claims abstract description 12
- 239000012948 isocyanate Substances 0.000 claims abstract description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 41
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 28
- 230000008569 process Effects 0.000 claims description 21
- 238000005470 impregnation Methods 0.000 claims description 16
- 239000002023 wood Substances 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000003054 catalyst Substances 0.000 claims description 9
- QWDQYHPOSSHSAW-UHFFFAOYSA-N 1-isocyanatooctadecane Chemical compound CCCCCCCCCCCCCCCCCCN=C=O QWDQYHPOSSHSAW-UHFFFAOYSA-N 0.000 claims description 6
- 241000219000 Populus Species 0.000 claims description 6
- 238000012805 post-processing Methods 0.000 claims description 5
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 4
- 238000007598 dipping method Methods 0.000 claims description 4
- GFLXBRUGMACJLQ-UHFFFAOYSA-N 1-isocyanatohexadecane Chemical compound CCCCCCCCCCCCCCCCN=C=O GFLXBRUGMACJLQ-UHFFFAOYSA-N 0.000 claims description 3
- 235000011609 Pinus massoniana Nutrition 0.000 claims description 3
- 241000018650 Pinus massoniana Species 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- YIDSTEJLDQMWBR-UHFFFAOYSA-N 1-isocyanatododecane Chemical compound CCCCCCCCCCCCN=C=O YIDSTEJLDQMWBR-UHFFFAOYSA-N 0.000 claims description 2
- 244000166124 Eucalyptus globulus Species 0.000 claims description 2
- 235000019687 Lamb Nutrition 0.000 claims description 2
- JGFBRKRYDCGYKD-UHFFFAOYSA-N dibutyl(oxo)tin Chemical compound CCCC[Sn](=O)CCCC JGFBRKRYDCGYKD-UHFFFAOYSA-N 0.000 claims description 2
- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 239000000126 substance Substances 0.000 abstract description 10
- 125000000217 alkyl group Chemical group 0.000 abstract description 5
- 210000002421 cell wall Anatomy 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000002352 surface water Substances 0.000 abstract description 4
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 abstract 2
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 230000003075 superhydrophobic effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
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
- B27K3/34—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
- 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
- B27K2240/00—Purpose of the treatment
- B27K2240/70—Hydrophobation treatment
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention relates to a preparation method of an overall hydrophobic timber. The timber is dipped by using alkyl isocyanate and dimethylformamide mixed solution, so that alkyl is grafted to a cell wall of the timber through a carbamate key. The method uses a self micron/nanometer roughness structure of the timber as basis, and grafts the alkyl to the cell wall of the timber through the carbamate key to form a low-surface-energy substance; a surface water drop contact angle thereof is about 147-151 degrees; the timber is sawn off in the cross section direction; and a water drop contact angle on the internal surface is about 147 degrees. The overall hydrophobic timber has the performances of mechanical wear resistance and chemical corrosion resistance; and in addition, the related preparation method is simple in steps, excellent in controllability, short in preparation period and easy to realize reaction conditions.
Description
Technical field
The present invention relates to wood technologies field, particularly relate to a kind of overall hydrophobic timber, the preparation method further relating to this overall hydrophobic timber。
Background technology
Inspiration by nature lotus leaf effect, super hydrophobic surface (contact angle of the surface of solids and water droplet is more than 150 °) has the performances such as the blocking water of excellence, antifog, anti-icing, anticorrosion and automatically cleaning and is paid close attention to widely because of it, has broad application prospects。
In the past few decades, various host materials are used to prepare super hydrophobic surface, such as, metal, glass, paper, fabric and polymer etc., different with these above-mentioned materials, timber is a kind of heterogeneous material being made up of cellulose, hemicellulose and lignin etc. inherently, because the anatomic construction of himself and porous, defines original micro/nano structure。
It is known that timber is as a kind of traditional environmental protection recyclable materials, have a wide range of applications in building, furniture etc.。But, timber in use inevitably and contact with moisture, causes that dimensional stability reduces, perishable, go mouldy, and have impact on its serviceability and life-span。Timber is carried out super-hydrophobic process, weakens the interaction between timber and moisture, make timber waterproof, anticorrosion, automatically cleaning, increase the service life etc. in performance excellence。Therefore, super-hydrophobic, self-cleaning performance are introduced timber-work, can significantly widen the application of timber。
A lot of methods are used to prepare super-hydrophobic timber, for instance sol-gel process, hydro-thermal method, plasma treatment, chemical vapour deposition (CVD) and LBL self-assembly etc.。But, on the one hand, these method complicated process of preparation existing, expensive, it is difficult to industrialization。On the other hand, substantial amounts of research concentrates on and builds the super-hydrophobic of wood surface, namely one layer of super-hydrophobic coat is built at wood surface, this super-hydrophobic coat is inevitably experience mechanical wear and chemical attack in actual use, causing that coating abrasion corrodes totally, timber completely loses ultra-hydrophobicity。
Therefore, building overall super-hydrophobic timber, being solve mechanical wear, chemical attack, thus improving a timber effective method as super hydrophobic material service life。
Summary of the invention
It is an object of the invention to for the defect and the deficiency that only build super-hydrophobic coat at wood surface that exist in prior art, it is provided that a kind of overall hydrophobic timber and preparation method thereof, this hydrophobic timber entirety is highly hydrophobic。
One of technical scheme provided by the invention is: the preparation method of the hydrophobic timber of a kind of entirety, adopts alkyl isocyanate and dimethylformamide mixed solution that timber is carried out impregnation process。
The consumption of mixed solution is being advisable by submergence timber。
In order to ensure dipping effect, it is preferable that the weight ratio of alkyl isocyanate and dimethylformamide is 1:(8-10), more preferably 1:9。
Alkyl isocyanate end can be bonded with the hydroxy chemical on wood cell wall, is introduced by hydrophobic alkyl on wood cell wall, reduces surface free energy。Alkyl isocyanate of the present invention is one or more in octadecylisocyanate, hexadecyl isocyanate, tetradecyl isocyanante, dodecyl isocyanate, being preferably octadecylisocyanate, it has the advantages that grafting is stable and hydrophobic effect is good。
Preferably, being added with catalyst in the described mixed solution that impregnation process adopts, the existence of catalyst can accelerate reaction process, makes more alkyl be grafted on timber hydroxyl, improves grafting efficiency。
Wherein, described catalyst can adopt this area conventional substances, and the addition of catalyst also can be added according to this area general knowledge。In order to ensure good additive effect, one or more in dibutyl tin laurate, stannous octoate, the Dibutyltin oxide of the preferred described catalyst of the present invention, the addition of catalyst with account for described mixed solution weight 0.5-1.5% for ideal。
In a kind of specific embodiment, mixed solution is added with the dibutyl tin laurate of 1%。
Described impregnation process particularly as follows: timber is placed in the mixed solution of alkyl isocyanate and dimethylformamide, vacuum impregnation 20-40min, then timber is imported in reactor together with mixed solution, isothermal holding 7-9h at 90-110 DEG C。
Preferably, being placed in by timber in the mixed solution of alkyl isocyanate and dimethylformamide, vacuum impregnation 30min, dipping vacuum is 0.1MPa, then imports in reactor by timber together with mixed solution, isothermal holding 8h at 100 DEG C。
Timber of the present invention is selected from timber commonly used in the art, for instance be selected from the one in quick growth poplar wood, fast-growing Eucalyptus, Pinus massoniana Lamb, it is preferred to quick growth poplar wood。
In order to ensure good dipping effect, preparation method of the present invention also includes the step that the timber before impregnation process carries out pretreatment, described pretreatment is: be (3-5) by timber volume ratio: (0.5-1.5): the toluene of (0.5-1.5), acetone, alcohol mixed solution extracting process 7-9h, then dry in 103-107 DEG C。
Preferably, described pretreatment is: by timber volume ratio be the toluene of 4:1:1, acetone, alcohol mixed solution extracting process 8h, then in 103-107 DEG C dry。
Timber before impregnation process is stripped the extract composition that can remove in timber, reduces the extract impact for wood performance, it is ensured that good graft effect。
After processing in order to ensure grafting, timber has good performance, method of the present invention also includes the step that the timber after impregnation process carries out post processing, described post processing is: be (3-5) by timber volume ratio: (0.5-1.5): the toluene of (0.5-1.5), acetone, alcohol mixed solution extracting process 7-9h, then dry in 103-107 DEG C。
Preferably, described post processing is: by timber volume ratio be the toluene of 4:1:1, acetone, alcohol mixed solution extracting process 8h, then in 103-107 DEG C dry。
The purpose that timber after impregnation process is stripped is to remove unreacted monomer and reaction dissolvent in timber, gets rid of the unreacted monomer impact on wood property。
The two of technical scheme provided by the invention are: a kind of overall hydrophobic timber, and the hydrophobic timber of described entirety adopts any one preparation method above-mentioned to obtain。
Meeting on the basis of this area general knowledge, above-mentioned each optimum condition, it is possible to combination in any, obtain each preferred embodiment of the present invention。
Method of the present invention, based on the micro-/ nano asperity structure of timber self, by amino-formate bond, alkyl is grafted on wood cell wall, constitute low-surface energy substance, its surface water droplet contact angle is 147 °-151 °, being cut along direction, cross section by timber, the water droplet contact angle in interior surface is about 147 °；The hydrophobic timber of entirety of the present invention also has the performance of mechanical resistant abrasion, resistance to chemical attack；Additionally, the preparation method step that the present invention relates to is simple, controllability good, manufacturing cycle is short, reaction condition is easily achieved。
Detailed description of the invention
Following example are used for illustrating the present invention, but are not limited to the scope of the present invention。The all commercially available acquisition of the raw material that the present invention relates to, the operation related to is this area routine operation if no special instructions。
Embodiment 1
The preparation method of the hydrophobic timber of a kind of entirety, comprises the steps:
(1) quick growth poplar wood (specification R × T × L:20mm × 20mm × 10mm) good for sawing is placed in apparatus,Soxhlet's, with the toluene of volume ratio 4:1:1, acetone, ethanol mixing extract extracting 8h, take out timber and be placed in electric drying oven with forced convection, dry at 105 ± 2 DEG C, standby；
(2) 40g octadecylisocyanate is dissolved in 360g anhydrous dimethyl formamide, then dried timber is placed in the mixed solution of the two, vacuum impregnation 30min, then imports in reactor by timber together with mixed solution, isothermal holding 8h at 100 DEG C；
(3) from reactor, take out timber, be placed in apparatus,Soxhlet's, be the toluene of 4:1:1, acetone, ethanol mixing extract extracting 8h by volume ratio, take out timber and be drying to obtain at 105 ± 2 DEG C。
Embodiment 2
The preparation method of the hydrophobic timber of a kind of entirety, with embodiment 1, it differs only in: the specification of (1) timber is R × T × L:20mm × 20mm × 20mm；(2) mixed solution of step (2) is added with 4g (1%) dibutyl tin laurate。
Embodiment 3
The preparation method of the hydrophobic timber of a kind of entirety, with embodiment 1, it differs only in: the consumption of anhydrous dimethyl formamide is 400g。
Embodiment 4
The preparation method of the hydrophobic timber of a kind of entirety, with embodiment 1, it differs only in: mixing extract is the toluene of volume ratio 5:1.5:1.5, acetone, alcohol mixeding liquid。
Embodiment 5
The preparation method of the hydrophobic timber of a kind of entirety, with embodiment 1, it differs only in: mixing extract is the toluene of volume ratio 3:0.5:0.5, acetone, alcohol mixeding liquid。
Embodiment 6
The preparation method of the hydrophobic timber of a kind of entirety, with embodiment 1, it differs only in: octadecylisocyanate is replaced with hexadecyl isocyanate。
Embodiment 7
The preparation method of the hydrophobic timber of a kind of entirety, with embodiment 1, it differs only in: quick growth poplar wood is replaced with Pinus massoniana Lamb。
The effect of the present invention is further illustrated below by way of experimental example。
Experimental example one contact angle and mechanical resistant wear testing
The water droplet contact angle of the hydrophobic timber that testing example 1-7 prepares, then cuts timber along direction, cross section, and with the Sandpapering of 80 orders, measures water droplet contact angle after friction treatment, and result is as shown in table 1:
Table 1 embodiment 1-7 wood surface water droplet contact angle, inner section water droplet contact angle
| Timber water droplet contact angle | Inner section water droplet contact angle after friction | |
| Embodiment 1 | 150° | 147° |
| Embodiment 2 | 151° | 148° |
| Embodiment 3 | 149° | 147° |
| Embodiment 4 | 147° | 146° |
| Embodiment 5 | 149° | 147° |
| Embodiment 6 | 147° | 146° |
| Embodiment 7 | 148° | 147° |
As can be seen from the above Table 1, the surface water droplet contact angle of the hydrophobic timber of the present invention reaches 147-151 °, after timber is cut off friction along cross section, its inner section water droplet contact angle, up to 146 °-148 °, illustrates that timber entirety all has good hydrophobicity and mechanical resistant abrasiveness。
Experimental example two resistance to chemical attack is tested
Strong acid is tested: the hydrophobic timber prepared by embodiment 1-7 is dipped in the hydrochloric acid solution of pH=2 12h, takes out and measures its water droplet contact angle；
Highly basic is tested: the hydrophobic timber prepared by embodiment 1-7 is dipped in the sodium hydroxide solution of pH=12 12h, takes out and measures its water droplet contact angle；
Organic solvent is tested: the hydrophobic timber prepared by embodiment 1-7 is dipped in 12h in dimethylformamide, normal hexane, toluene, acetone respectively, takes out and measures its water droplet contact angle；
Result is as shown in table 2:
The contact angle of table 2 embodiment 1-7 timber
| Strong acid | Highly basic | Dimethylformamide | Normal hexane | Toluene | Acetone | |
| Embodiment 1 | 142° | 141° | 146° | 144° | 146° | 145° |
| Embodiment 2 | 143° | 143° | 145° | 146° | 146° | 147° |
| Embodiment 3 | 141° | 142° | 144° | 143° | 144° | 145° |
| Embodiment 4 | 140° | 141° | 146° | 145° | 145° | 146° |
| Embodiment 5 | 142° | 142° | 145° | 146° | 144° | 144° |
| Embodiment 6 | 141° | 141° | 144° | 145° | 144° | 145° |
| Embodiment 7 | 142° | 141° | 145° | 144° | 144° | 145° |
As can be seen from the above Table 2, the hydrophobic timber that the present invention prepares has good chemical resistance, and after strong acid or highly basic soak, its water droplet contact angle is up to more than 140 °；Additionally, also have good organic solvent-resistant corrosivity, after organic solvent soaks, its water droplet contact angle is at about 145 °。
Experimental example three stability test
At room temperature being placed 3 months by the hydrophobic timber of embodiment 1-7, test its water droplet contact angle, result shows that its contact angle is about 145 °, illustrates that the timber of the present invention has good stability。
Although, above use generality explanation, detailed description of the invention and test, the present invention is described in detail, but on basis of the present invention, it is possible to it is made some modifications or improvements, and this will be apparent to those skilled in the art。Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to the scope of protection of present invention。
Claims (9)
1. the preparation method of the hydrophobic timber of entirety, it is characterised in that: adopt alkyl isocyanate and dimethylformamide mixed solution that timber is carried out impregnation process。
2. preparation method according to claim 1, it is characterised in that: the weight ratio of described alkyl isocyanate and dimethylformamide is 1:(8-10), it is preferred to 1:9。
3. preparation method according to claim 1 and 2, it is characterized in that: described alkyl isocyanate is one or more in octadecylisocyanate, hexadecyl isocyanate, tetradecyl isocyanante, dodecyl isocyanate, it is preferred to octadecylisocyanate。
4. according to the arbitrary described preparation method of claim 1-3, it is characterized in that: described mixed solution is added with catalyst, described catalyst is selected from one or more in dibutyl tin laurate, stannous octoate, Dibutyltin oxide, it is preferable that the addition of catalyst is the 0.5-1.5% of described mixed solution weight。
5. according to the arbitrary described preparation method of claim 1-4, it is characterized in that: described impregnation process particularly as follows: be placed in the mixed solution of alkyl isocyanate and dimethylformamide by timber, vacuum impregnation 20-40min, then timber is imported in reactor together with mixed solution, isothermal holding 7-9h at 90-110 DEG C；
Preferably, being placed in by timber in the mixed solution of alkyl isocyanate and dimethylformamide, vacuum impregnation 30min, dipping vacuum is 0.1MPa, then imports in reactor by timber together with mixed solution, isothermal holding 8h at 100 DEG C。
6. according to the arbitrary described preparation method of claim 1-5, it is characterised in that: described timber one in quick growth poplar wood, fast-growing Eucalyptus, Pinus massoniana Lamb, it is preferred to quick growth poplar wood。
7. according to the arbitrary described preparation method of claim 1-6, it is characterized in that, also include the step that the timber before impregnation process is carried out pretreatment, described pretreatment is: be (3-5) by timber volume ratio: (0.5-1.5): the toluene of (0.5-1.5), acetone, alcohol mixed solution extracting process 7-9h, then dry in 103-107 DEG C。
Preferably, it is the toluene of 4:1:1, acetone, alcohol mixed solution extracting process 8h by timber volume ratio, then dries in 103-107 DEG C。
8. the preparation method according to claim 1-7, it is characterized in that, also include the step that the timber after impregnation process is carried out post processing, described post processing is: be (3-5) by timber volume ratio: (0.5-1.5): the toluene of (0.5-1.5), acetone, alcohol mixed solution extracting process 7-9h, then dry in 103-107 DEG C。
Preferably, it is the toluene of 4:1:1, acetone, alcohol mixed solution extracting process 8h by timber volume ratio, then dries in 103-107 DEG C。
9. the hydrophobic timber of entirety that the arbitrary described preparation method of claim 1-8 obtains。
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| CN105690516B CN105690516B (en) | 2017-07-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106891403A (en) * | 2017-03-20 | 2017-06-27 | 北京林业大学 | A kind of composite modified fast growing wood and its composite modifying method |
| CN108422514A (en) * | 2018-03-27 | 2018-08-21 | 南京林业大学 | The method of modifying of anti-fishscale bamboo/timber |
| CN108972777A (en) * | 2018-07-13 | 2018-12-11 | 南京林业大学 | A kind of preparation method of super-hydrophobic bamboo/timber |
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| CN106891403A (en) * | 2017-03-20 | 2017-06-27 | 北京林业大学 | A kind of composite modified fast growing wood and its composite modifying method |
| CN108422514A (en) * | 2018-03-27 | 2018-08-21 | 南京林业大学 | The method of modifying of anti-fishscale bamboo/timber |
| CN108972777A (en) * | 2018-07-13 | 2018-12-11 | 南京林业大学 | A kind of preparation method of super-hydrophobic bamboo/timber |
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| CN105690516B (en) | 2017-07-28 |
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