CN102554991A - Method for improving whole hydrophobicity of wood - Google Patents
Method for improving whole hydrophobicity of wood Download PDFInfo
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- CN102554991A CN102554991A CN2012100328869A CN201210032886A CN102554991A CN 102554991 A CN102554991 A CN 102554991A CN 2012100328869 A CN2012100328869 A CN 2012100328869A CN 201210032886 A CN201210032886 A CN 201210032886A CN 102554991 A CN102554991 A CN 102554991A
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Abstract
The invention relates to a method for improving the whole hydrophobicity of wood. The method comprises the steps of dissolving a hydrophobic reagent (namely Alkyl Ketene Dimer (AKD)) by hexyl hydride, preparing solution with the mass concentration being 2-10:100; then in a vacuum-high pressure dipping process, keeping the wood in the environment with the vacuum degree being -0.09MPa for 15-60min, then sucking the AKD hexyl hydride solution with the mass concentration being 2-10:100 in a dipping tank, pressurizing to be 1.0MPa-3.0MPa, keeping for 0.5h-4h under a high pressure state; and finally, heating the processed wood for 1h-5h under the temperature being 100 DEG C-120 DEG C. Therefore, the AKD and the cellulose in the wood are subjected to chemical reaction, so as to produce functional wood with whole hydrophobicity. According to the new method, the process is simple, the hydrophobic effect is obvious, and the whole hydrophobicity of the wood can be improved.
Description
Technical field
The present invention relates to the whole hydrophobic method of a kind of raising timber, be particularly useful for the requirement reagent and the technology of environmental protection more, and be fit to the method for the whole hydrophobization processing of indoor purposes timber.
Background technology
At present, improving Wood Dimensional Stability is to enlarge the timber scope of application, prolongs timber service life, increases an urgent demand of wood products added value.In recent decades; Improve Wood Dimensional Stability through heat treatment, the modes such as hydrophobic polymer and chemical modification of filling both at home and abroad, and proved that using the alkyls compound that the hydrophobization modification is carried out in timber inside is the effective means that improves timber hydrophobicity and dimensional stability.Like acetylation timber, commodity
by name (Gu Yamu).Acetylation timber is to be raw material with the acetic anhydride, carries out chemical reaction after fully mixing, and the hydroxyl on the wood cell wall is replaced by acetyl group, obtains acetylation timber.The acetylation Wood Dimensional Stability can obviously improve.But its processing procedure conditional request is harsh, needs high temperature high pressure process, and can produce toxic byproduct, therefore mostly is the outdoor use material.Therefore, research and develop the reagent and the technology of new environmental protection more and be fit to indoor purposes and satisfy the present market demand, have broad application prospects.
Through literature survey, receive to use in the papermaking inspiration of AKD emulsion abroad, the scope of application with it has expanded to the hydrophobically modified to wood surface, can improve water droplet more than contact angle to 100 degree of wood surface.As; Patent WO2005009700 A1 (Treatment of thermally modified wood); Be through using acetone organic solvent dissolution AKD to prepare treatment fluid, external coating or soak heat treated timber is then through dry (100～140 ℃; The heat-treated wood of 15～60min) preparation hydrophobizations, its surperficial water contact angle can be brought up to 90～100 °.The timber that in this patent, uses is timber after heat treatment; Timber heat treatment is meant that timber handles in the modification that is higher than under 100 ℃ the temperature; Although can reduce the fibre saturated point of timber after the heat treatment; Improve Wood Dimensional Stability and hydrophobicity, the just hydrophobicity of wood surface of its raising simultaneously, the hydrophobicity inner for prior timber do not relate to.And the raising of the hydrophobicity of wood surface can not improve its inner dimensional stability, and the inner hydrophobicity of timber is only the key factor that improves durability of wood ability.And the timber after this patent is handled is owing to be heat-treated wood, so can occur also that the colour of timber is dark, degradation disappearance under the intensity.
Summary of the invention
The objective of the invention is to propose the whole hydrophobic method of a kind of raising timber.It is the hexane solution that earlier hydrophobic agents alkyl ketene dimer (Alkyl Ketene Dimer (AKD)) is configured to certain mass concentration; Then utilize the vacuum pressed impregnating equipment, timber is carried out high-pressure impregnation handle, make AKD get into the inside of timber; Just pass through heat treated at last; Make the cellulose generation chemical reaction in AKD and the timber, on timber inner cell wall, have hydrophobicity, thereby make timber inside also have certain hydrophobic property.
The technical scheme that the present invention adopted is:
The whole hydrophobic method of a kind of raising timber, its step is:
1) the normal temperature solvation of water-repelling agent: hydrophobization reagent alkyl ketene dimer is made into 2～10 with n-hexane: the alkyl ketene dimer/hexane solution of 100 mass concentrations;
2) vacuum pressed impregnation process: let timber vacuum in impregnating autoclave be maintenance under-0.09 MPa 15 minutes～60 minutes earlier; Then with 2～10: the alkyl ketene dimer of 100 mass concentrations/hexane solution sucks in the impregnating autoclave; Be forced into 1.0 MPas～3.0 MPas, and under high pressure conditions, kept 0.5 hour～4 hours;
3) dried: with the timber after the impregnation process 100 ℃～120 ℃ temperature heat dryings 1 hour～5 hours.
The first moisture content of timber is not higher than 10% before the said impregnation process.
Said alkyl ketene dimer/hexane solution mass concentration is 5: 100.
Said 2～10: the alkyl ketene dimer of 100 mass concentrations/hexane solution sucks in the impregnating autoclave, is forced into 1.0 MPas, and under high pressure conditions, keeps 1 hour.
The invention has the beneficial effects as follows: because the modification inorganic agent that adopted n-hexane organic solvent dissolution AKD powder preparation, avoided the drawback that a large amount of water that exist can make AKD lose efficacy in the traditional emulsion process; Owing to adopt the vacuum pressed impregnation technology to bring water-repelling agent the inside of timber into, make timber all have hydrophobicity again, reached the whole hydrophobic effect of timber, thereby fundamentally improved Wood Dimensional Stability from the surface to inner all cell membranes.
The specific embodiment
Below in conjunction with exemplary embodiments the present invention is described further.
The whole hydrophobic method of a kind of raising timber of the present invention, its step is following:
(1) the normal temperature solvation of water-repelling agent: (Alkyl Ketene Dimer (AKD)) is made into 2～10 with n-hexane with hydrophobization reagent alkyl ketene dimer: the AKD/ hexane solution of 100 mass concentrations.With water-repelling agent AKD powder normal temperature solvation, the water contact angle of hydrophobization timber can be brought up to more than 120 ° through the n-hexane organic solvent.And bring water-repelling agent the inside of timber into through vacuum-impregnating by pressure, and so both realized the normal temperature solvation of AKD, avoided the drawback that a large amount of water that exist can make AKD lose efficacy in the traditional emulsion process again, promptly AKD contacts the generation side reaction with water.The hydrophobization timber of this method preparation has significantly improved hydrophobic performance, and reaches the effect of whole hydrophobization, and simultaneously, the timber after the processing has kept the former wood color of timber, and the intensity of timber can not reduce.
For example: take by weighing AKD powder 150kg and n-hexane organic solvent and mix, being mixed with mass concentration after fully stirring is 5% (the AKD/ hexane solution of 5: 100 mass concentrations) AKD/ hexane solution 15000kg.
(2) vacuum pressed impregnation process: let timber vacuum in impregnating autoclave be maintenance under-0.09 MPa 15 minutes～60 minutes earlier; Then with 2～10: the AKD/ hexane solution of 100 mass concentrations sucks in the impregnating autoclave; Be forced into 1.0 MPas～3.0 MPas, and under high pressure conditions, kept 0.5 hour～4 hours.Bring water-repelling agent the inside of timber into through above-mentioned vacuum-impregnating by pressure, avoided the drawback that a large amount of water that exist can make AKD lose efficacy in the traditional emulsion process like this, simultaneously water-repelling agent can be uniformly and timber react.
The first moisture content of above-mentioned timber is limited in and is not higher than 10%.
For example: with moisture content is that 8% fir wood plank is put into vacuum-impregnating by pressure jar, vacuumizes earlier, makes vacuum reach-0.09 MPa, and keeps this vacuum 15 minutes.Then the AKD solution for preparing is sucked in the impregnating autoclave, and plus-pressure to 1.0 MPa, under this pressure, kept 1 hour.Then, fir wood plank is taken out, place the interior room temperature of fume hood to place more than 24 hours, n-hexane is volatilized naturally removal.
(3) dried: with the timber after the impregnation process 100 ℃～120 ℃ temperature heat dryings 1 hour～5 hours.Make the fibrin reaction in hydrophobic agents and the timber, make timber all have hydrophobicity from the surface to inner all cell membranes.
For example: the fir wood plank after will handling was put in the drying box, in 110 ℃ of following reacting by heating 3 hours.Make fir wood plank with whole hydrophobic performance.
The water contact angle of the whole hydrophobization fir wood plank optional position of employing this method preparation is all greater than 120 °.
Characteristics of the present invention are following:
The one, because the modification inorganic agent that adopted n-hexane organic solvent dissolution AKD powder preparation, avoided the drawback that a large amount of water that exist can make AKD lose efficacy in the traditional emulsion process;
The 2nd, owing to adopt the vacuum pressed impregnation technology to bring water-repelling agent the inside of timber into, make timber all have hydrophobicity from the surface to inner all cell membranes, reached the whole hydrophobic effect of timber, fundamentally improved Wood Dimensional Stability.The hydrophobization timber of this method preparation has significantly improved hydrophobic performance, and reaches the effect of whole hydrophobization, and the water contact angle of hydrophobization timber can be brought up to more than 120 °.Simultaneously, the timber after the processing has kept the former wood color of timber, and the intensity of timber can not reduce.
Therefore, it is simple that the above-mentioned method for preparing whole hydrophobization timber has technology, and the hydrophobization excellent performance is easy to the characteristics of suitability for industrialized production.
Claims (4)
1. one kind is improved the whole hydrophobic method of timber, it is characterized in that its step is:
1) the normal temperature solvation of water-repelling agent: hydrophobization reagent alkyl ketene dimer is made into 2～10 with n-hexane: the alkyl ketene dimer/hexane solution of 100 mass concentrations;
2) vacuum pressed impregnation process: let timber vacuum in impregnating autoclave be maintenance under-0.09 MPa 15 minutes～60 minutes earlier; Then with 2～10: the alkyl ketene dimer of 100 mass concentrations/hexane solution sucks in the impregnating autoclave; Be forced into 1.0 MPas～3.0 MPas, and under high pressure conditions, kept 0.5 hour～4 hours;
3) dried: with the timber after the impregnation process 100 ℃～120 ℃ temperature heat dryings 1 hour～5 hours.
2. the whole hydrophobic method of a kind of raising timber as claimed in claim 1, it is characterized in that: the first moisture content of timber is not higher than 10% before the said impregnation process.
3. the whole hydrophobic method of a kind of raising timber as claimed in claim 1, it is characterized in that: said alkyl ketene dimer/hexane solution mass concentration is 5: 100.
4. the whole hydrophobic method of a kind of raising timber as claimed in claim 1; It is characterized in that: said 2～10: the alkyl ketene dimer of 100 mass concentrations/hexane solution sucks in the impregnating autoclave; Be forced into 1.0 MPas, and under high pressure conditions, kept 1 hour.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100328869A CN102554991A (en) | 2012-02-14 | 2012-02-14 | Method for improving whole hydrophobicity of wood |
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| CN2012100328869A CN102554991A (en) | 2012-02-14 | 2012-02-14 | Method for improving whole hydrophobicity of wood |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302708A (en) * | 2013-05-08 | 2013-09-18 | 广东省宜华木业股份有限公司 | Preparation method of novel hydrophobic wood |
| CN104356356A (en) * | 2014-11-28 | 2015-02-18 | 中国林业科学研究院林产化学工业研究所 | Preparation method of cellulose hydrophobic material |
| CN105062107A (en) * | 2015-09-17 | 2015-11-18 | 无限极（中国）有限公司 | Fibrous composite and preparation method and application thereof |
| CN107866885A (en) * | 2017-11-14 | 2018-04-03 | 唐林元 | A kind of processing method of wood mould |
| CN108381707A (en) * | 2018-03-29 | 2018-08-10 | 金正元 | A kind of hydrophobic method of raising timber and modified timber |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63176101A (en) * | 1987-01-17 | 1988-07-20 | トキワ木材工業株式会社 | Method of treating wood |
| JPH05124014A (en) * | 1991-08-07 | 1993-05-21 | Japan Carlit Co Ltd:The | Surface modified wood chip |
| WO2005009700A1 (en) * | 2003-07-25 | 2005-02-03 | Stora Enso Oyj | Treatment of thermally modified wood |
| CN102076470A (en) * | 2008-06-27 | 2011-05-25 | 太尔公司 | Method for treating a wood board |
| CN102152356A (en) * | 2011-03-23 | 2011-08-17 | 中国林业科学研究院木材工业研究所 | Method for preparing densified woods through silica sol |
-
2012
- 2012-02-14 CN CN2012100328869A patent/CN102554991A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63176101A (en) * | 1987-01-17 | 1988-07-20 | トキワ木材工業株式会社 | Method of treating wood |
| JPH05124014A (en) * | 1991-08-07 | 1993-05-21 | Japan Carlit Co Ltd:The | Surface modified wood chip |
| WO2005009700A1 (en) * | 2003-07-25 | 2005-02-03 | Stora Enso Oyj | Treatment of thermally modified wood |
| CN102076470A (en) * | 2008-06-27 | 2011-05-25 | 太尔公司 | Method for treating a wood board |
| CN102152356A (en) * | 2011-03-23 | 2011-08-17 | 中国林业科学研究院木材工业研究所 | Method for preparing densified woods through silica sol |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302708A (en) * | 2013-05-08 | 2013-09-18 | 广东省宜华木业股份有限公司 | Preparation method of novel hydrophobic wood |
| CN104356356A (en) * | 2014-11-28 | 2015-02-18 | 中国林业科学研究院林产化学工业研究所 | Preparation method of cellulose hydrophobic material |
| CN105062107A (en) * | 2015-09-17 | 2015-11-18 | 无限极（中国）有限公司 | Fibrous composite and preparation method and application thereof |
| CN107866885A (en) * | 2017-11-14 | 2018-04-03 | 唐林元 | A kind of processing method of wood mould |
| CN108381707A (en) * | 2018-03-29 | 2018-08-10 | 金正元 | A kind of hydrophobic method of raising timber and modified timber |
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Application publication date: 20120711 |