CN101559614A - Technology for preparing magnetic low-grade fast growing wood by in-situ densification - Google Patents
Technology for preparing magnetic low-grade fast growing wood by in-situ densification Download PDFInfo
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- CN101559614A CN101559614A CNA2009100390158A CN200910039015A CN101559614A CN 101559614 A CN101559614 A CN 101559614A CN A2009100390158 A CNA2009100390158 A CN A2009100390158A CN 200910039015 A CN200910039015 A CN 200910039015A CN 101559614 A CN101559614 A CN 101559614A
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Abstract
The invention relates to the technology and formulation of a magnetic low-grade fast growing wood by immersion of low-grade fast growing wood in inorganic solution, realizes the function of magnetism through doping nanometer gamma-Fe2O3 or superfine gamma-Fe2O3, Fe3O4 and other ferrite magnetism materials and all other magnetic powdered materials, and belongs to the field of preparation and application of functional woods. The technology has the advantages that the densification process of the low-grade fast growing wood is skillfully combined with realization of functional process of magnetism of the fast growing wood; the wood in a vacuum-pressure tank is vacuumized (0.1MPa) repeatedly and pressurized (15-30MPa) by the vacuum-pressure tank; soluble glass solution (solution C) with mass percentage of between 10 to 25 percent and uranium octaborate tetrahydrate (solution B) with mass percentage of between 8 and 15 percent which are doped with magnetic powder and surface active agent in sequence are injected inside the wood by difference of pressure inside the wood and pressure outside the wood, and the wood is dried in a drying kiln at a temperature not higher than 120 DEG C.
Description
One, technical field
The present invention relates to the technology and the prescription of low-quality fast growing wood inorganic solution dipping preparation magnetic low-quality fast growing wood, by in maceration extract, mixing nanometer γ-Fe
2O
3Or ultra-fine γ-Fe
2O
3, Fe
3O
4Have the function of magnetic Deng ferrite magnetic material and other all magnetic powder materials to realize timber, belong to functional timber preparation and application, this composite magnetic timber has functions such as electromagnetic wave absorption, electromagnetic shielding.
Two, background technology
Along with the progress of society, the continuous development of science and technology, the functionalization exploitation of timber has become the focus of material science research.The inorganic compounding modification technology of timber can improve timber intensity, improve its density, heat resistance, combustion-supporting performance, antibiotic antiseptic property etc.Expansion timber functional modification gives timber new function, is the effective way that further improves the timber added value.
Magnetic timber is by adding magnetic material in timber, making timber and magnetic functional characteristic reach a kind of composite of good binding.Timber after processing also has characteristics such as electro-magnetic wave absorption except that having magnetic characteristic, be with a wide range of applications in fields such as inhaling ripple, electromagnetic shielding, electronic packaging, high-grade special finishing.Japanese patent laid-open 2001-118711 and Chinese patent prospectus CN1906989A all disclose a kind of preparation method of magnetic timber, its preparation method is exactly that ferrite powder and environmental-protection type adhesive are mixed, make the splinting layer structure with timber, thereby making magnetic timber.In addition, J.Magn.Magn.Mater (magnet magnetic material journal), 2007,310 (2), 1028-1029, paper " Experimental study onelectromagnetic wave absorbing control of coating magnetic wood using agroovingprocess " has reported that another kind of magnetic timber, its preparation method are by punching on timber, in the hole, put into the magnetic manganese-zinc ferrite, thus preparation magnetic composite wood.These preparation method's cost height of having reported, the magnetic uniformity of magnetic timber is not good enough.Patent " a kind of preparation method of magnetic timber " (number of patent application: directly timber is soaked 200710066337.2), utilize a series ofization reaction in-situ preparing to go out magnetic material again, realize timber and the compound purpose of inorganic magnetic material, the magnetic uniformity that is characterized in preparing composite wood is good, but its process-cycle is longer, not high to utilization ratio of raw materials, be unsuitable for large-scale industrial production.
Three, summary of the invention
The object of the invention is to prepare the composite functional timber that a kind of low-quality fast growing wood original position is closely knit and have magnetic, can guarantee that the mechanical property that improves the low-quality fast growing wood makes it have good dimensional stability, can make the low-quality fast growing wood have certain magnetic performance in the process of densification again, maximum characteristics of the present invention be the densification technology and the functional skill perfect adaptation down that realizes its magnetic with the low-quality fast growing wood.
The present invention adopts vacuum-pressurized canister equipment such as (vacuum can reach 0.1Mpa, and maximum pressure can reach 30Mpa) that inorganic dispersion liquid is directly infiltrated in the timber, thereby prepares the low-quality fast growing wood that the preparation of original position densification has magnetic behavior.Production stage is as follows:
1) water glass solution of configuration 10-25% adds bleeding agent to increase the inorganic material surface activity in glass solution, this solution is called solution A.
2) four water, eight borate solutions of configuration 8-15%, at first four water, eight borates are four water, eight boric acid uranium, and add bleeding agent to increase the inorganic material surface activity in solution, and this solution is called solution B.
3) adding mass fraction in A solution is nanometer γ-Fe of 0.5-1%
2O
3Or ultra-fine γ-Fe
2O
3Powder, fully dispersed with stirring is prepared solution C, can also select other magnetic powder material, and same control is added mass fraction and is being prepared solution C for 0.5-1%.
4) the low-quality fast growing wood is sealed in vacuum-pressurized canister, vacuumizing 40min clock to a jar internal pressure is 0.1Mpa, opens a jar last valve then and injects C solution.
5) treat that C solution injects after, valve-off is forced into 15-30Mpa, and keeps this pressure 120min.
6) open valve pressure release backflow C solution after, be evacuated to 0.1Mpa once more, and keep 60min.
7) open another valve, inject B solution, valve-off is forced into 15-30Mpa once more, and keeps this pressure 90min, under high pressure simultaneously B solution is heated to 80 ℃-90 ℃, insulation 30-60min.
8) pressure release backflow B solution is opened a jar discharging, and the low-quality fast growing wood of having filled inorganic material is put into drying kiln for drying, and baking temperature is below 120 ℃.
Four, the specific embodiment
Embodiment one:
With low-quality fast growing wood-eucalyptus section of being sawn into, pass through simple process again, put into vacuum-pressurized canister after removing its surperficial dust, vacuumizing 40min clock to a jar internal pressure after the sealing is 0.1Mpa, open a jar last valve then and inject C solution, after treating that C solution injects, valve-off is forced into 20Mpa, and keeps this pressure 120min.After opening valve pressure release backflow C solution, be evacuated to 0.1Mpa once more, and keep 60min.Open another valve, inject B solution, valve-off is forced into 20Mpa once more, and keeps this pressure 90min, under high pressure simultaneously B solution is heated to 80 ℃-90 ℃, insulation 30-60min.Pressure release backflow B solution is opened a jar discharging, the eucalyptus of having filled inorganic material is put into dry kiln carry out drying under 110 ℃-120 ℃.
Embodiment two:
With low-quality fast growing wood-willow section of being sawn into, pass through simple process again, put into vacuum-pressurized canister after removing its surperficial dust, vacuumizing 40min clock to a jar internal pressure after the sealing is 0.1Mpa, open a jar last valve then and inject C solution, after treating that C solution injects, valve-off is forced into 20Mpa, and keeps this pressure 120min.After opening valve pressure release backflow C solution, be evacuated to 0.1Mpa once more, and keep 60min.Open another valve, inject B solution, valve-off is forced into 20Mpa once more, and keeps this pressure 90min, under high pressure simultaneously B solution is heated to 80 ℃-90 ℃, insulation 30-60min.Pressure release backflow B solution is opened a jar discharging, the eucalyptus of having filled inorganic material is put into dry kiln carry out drying under 120 ℃.
Embodiment three:
With low-quality fast growing wood-eucalyptus section of being sawn into, pass through simple process again, put into vacuum-pressurized canister after removing its surperficial dust, vacuumizing 40min clock to a jar internal pressure after the sealing is 0.1Mpa, open a jar last valve then and inject C solution, after treating that C solution injects, valve-off is forced into 30Mpa, and keeps this pressure 120min.After opening valve pressure release backflow C solution, be evacuated to 0.1Mpa once more, and keep 60min.Open another valve, inject B solution, valve-off is forced into 30Mpa once more, and keeps this pressure 90min, under high pressure simultaneously B solution is heated to 80 ℃-90 ℃, insulation 30-60min.Pressure release backflow B solution is opened a jar discharging, the eucalyptus of having filled inorganic material is put into dry kiln carry out drying under 120 ℃.
Embodiment four:
With low-quality fast growing wood-willow section of being sawn into, pass through simple process again, put into vacuum-pressurized canister after removing its surperficial dust, vacuumizing 40min clock to a jar internal pressure after the sealing is 0.1Mpa, open a jar last valve then and inject C solution, after treating that C solution injects, valve-off is forced into 30Mpa, and keeps this pressure 120min.After opening valve pressure release backflow C solution, be evacuated to 0.1Mpa once more, and keep 60min.Open another valve, inject B solution, valve-off is forced into 30Mpa once more, and keeps this pressure 90min, under high pressure simultaneously B solution is heated to 80 ℃-90 ℃, insulation 30-60min.Pressure release backflow B solution is opened a jar discharging, the eucalyptus of having filled inorganic material is put into dry kiln carry out drying under 120 ℃.
Claims (6)
1) a kind of original position densification magnetic low-quality fast growing wood, be characterized in densification technology and the functional technology perfect adaptation that realizes its magnetic with the low-quality fast growing wood, (vacuum can reach 0.1Mpa to adopt vacuum-pressurized canister, maximum pressure can reach 30Mpa) timber in the jar is vacuumized pressurization (15-30Mpa) again after (0.1Mpa) repeatedly, utilize timber inner and outer air pressure difference that the aqueous solution or the dispersion liquid of inorganic matter directly infiltrated in the timber, thereby prepare the low-quality fast growing wood that the preparation of original position densification has magnetic behavior.
2) selected inorganic filler is that the water glass solution of 10-25% and the mass fraction of surfactant are four water, eight borate solutions (first-selected four water, eight boric acid uranium) of 8-15% for the mass fraction that adds surfactant.
3) selected magnetic powder is mainly γ-Fe
2O
3On ferrite, can also select other magnetic material, before it topic be want in water glass solution, fully to disperse and do not react with waterglass, not luming not reunite gets final product.
4) selected timber is the low-quality fast growing wood, is characterized in that material is loose, helps the inorganic matter dispersion liquid and enters timber inside, thereby guarantee that enough magnetic powders enter the magnetic performance that guarantees composite wood in the timber.
5) in process, be forced into 15-30Mpa behind injection four water eight borate solutions, and keep this pressure 90min, under high pressure simultaneously four water, eight borate solutions are heated to 80 ℃-90 ℃, insulation 30-60min makes four water, eight borates and waterglass fully react formation spacial framework and solidifying.
6) the low-quality fast growing wood that will fill inorganic material is put into drying kiln for drying, and baking temperature is not higher than 120 ℃, and drying time is at 2-10h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100390158A CN101559614A (en) | 2009-04-28 | 2009-04-28 | Technology for preparing magnetic low-grade fast growing wood by in-situ densification |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100390158A CN101559614A (en) | 2009-04-28 | 2009-04-28 | Technology for preparing magnetic low-grade fast growing wood by in-situ densification |
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| CN101559614A true CN101559614A (en) | 2009-10-21 |
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| CNA2009100390158A Pending CN101559614A (en) | 2009-04-28 | 2009-04-28 | Technology for preparing magnetic low-grade fast growing wood by in-situ densification |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104540376A (en) * | 2014-12-10 | 2015-04-22 | 鹤山市木森木制品有限公司 | Modified fast-growing wood slurry with electromagnetic shielding effect and preparation method thereof |
| CN106272782A (en) * | 2016-08-30 | 2017-01-04 | 开平市瑞兴木业制品有限公司 | A kind of fast growing wood closely knit and processing method of conductive and heat-conductive in situ |
| CN111873121A (en) * | 2020-07-14 | 2020-11-03 | 安徽葵普科技有限公司 | Magnetic wood treatment process |
-
2009
- 2009-04-28 CN CNA2009100390158A patent/CN101559614A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104540376A (en) * | 2014-12-10 | 2015-04-22 | 鹤山市木森木制品有限公司 | Modified fast-growing wood slurry with electromagnetic shielding effect and preparation method thereof |
| CN106272782A (en) * | 2016-08-30 | 2017-01-04 | 开平市瑞兴木业制品有限公司 | A kind of fast growing wood closely knit and processing method of conductive and heat-conductive in situ |
| CN111873121A (en) * | 2020-07-14 | 2020-11-03 | 安徽葵普科技有限公司 | Magnetic wood treatment process |
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Application publication date: 20091021 |