CN112825698A - Method for inducing standing tree to produce wood/inorganic nano composite material - Google Patents
Method for inducing standing tree to produce wood/inorganic nano composite material Download PDFInfo
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- CN112825698A CN112825698A CN202110063855.9A CN202110063855A CN112825698A CN 112825698 A CN112825698 A CN 112825698A CN 202110063855 A CN202110063855 A CN 202110063855A CN 112825698 A CN112825698 A CN 112825698A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
- A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G17/00—Cultivation of hops, vines, fruit trees, or like trees
- A01G17/005—Cultivation methods
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G23/00—Forestry
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N55/00—Biocides, pest repellants or attractants, or plant growth regulators, containing organic compounds containing elements other than carbon, hydrogen, halogen, oxygen, nitrogen and sulfur
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- Wood Science & Technology (AREA)
- Engineering & Computer Science (AREA)
- Botany (AREA)
- Pest Control & Pesticides (AREA)
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- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
The invention discloses a method for inducing standing wood to generate a wood/inorganic nano composite material, which belongs to the technical field of research of wood inorganic nano composite materials. The invention has the following beneficial effects: (1) the inorganic nano composite material obtained by the invention has the advantages of compact structure after modification, small specific volume of the conduit, increased density, increased compression strength of the transverse striation, increased hardness and wear resistance and increased silicon element content. (2) Compared with the traditional impregnation method, the process of the invention is more moderate, and the obtained inorganic nano composite material has more uniform texture. (3) The preparation method has the advantages of no environmental pollution, simple process and low energy consumption.
Description
Technical Field
The invention relates to the technical field of research on inorganic wood nano composite materials, in particular to a method for inducing standing trees to produce wood/inorganic nano composite materials.
Background
At present, with the ecological pressure and the requirement of sustainable development, fast-growing forests become important sources of raw materials for wood industry, and have replaced precious high-quality solid wood in some fields. China fast-growing forest tree species mainly comprise cedar, poplar and eucalyptus, and wood has inherent defects of easiness in drying, shrinkage, moisture expansion, decay, flammability and the like, so that the application of the Chinese fast-growing forest tree species in wood products is limited.
The traditional method is to carry out specific modification treatment on the wood, such as heat treatment, acetylation, phenolic resin impregnation and the like, so as to improve the comprehensive performance of the wood. However, these methods are all post-processing treatment methods, and have the disadvantages of high energy consumption, complex process, and environmental harm caused by chemical agents.
Therefore, it is an urgent need to solve the problem of providing a wood modification process with low consumption, environmental protection and simplicity.
Disclosure of Invention
In view of the above, the present invention provides a method for inducing standing wood to produce a wood/inorganic nanocomposite material.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for inducing standing wood to produce wood/inorganic nano composite material comprises the following steps: the method comprises the steps of taking ethyl orthosilicate solution as a precursor, taking fast-growing forest wood standing trees as wood matrixes to be treated, drilling a pore channel from bark to xylem on a trunk of the wood matrixes to be treated to serve as a slow release part, and conveying the precursor from the slow release part to the xylem by using a drip slow release method to obtain the inorganic nano composite material.
Has the advantages that:
the inorganic nano composite material obtained by the preparation method has the advantages of compact structure after modification, small specific volume of the conduit, increased density, increased compression strength of the transverse striation and increased hardness and wear resistance. After the inorganic nano composite material is microscopically sliced, the composite material can be observed to generate a more compact structure, and yellow inclusions are contained in tube holes, fibers and wood rays. The particle size of the nano-sized or micron-sized particles can be seen through analysis of a scanning electron microscope, the particles are deposited in wood rays, catheters and wood fibers, and the particles mainly contain K, Ca, Si, C and O elements through EDS analysis.
As a preferable technical scheme of the invention, the concentration of the tetraethoxysilane solution is 1-100 mmol L-1The solvent is preferably ethanol or diethyl ether. And (3) dissolving the solute under magnetic stirring at normal temperature for 5-10 min.
The beneficial effects of the above technical scheme are: the inorganic nano composite material produced under the solution concentration has more uniform and compact texture.
As a preferable technical scheme of the invention, the drip sustained-release treatment frequency is once per week, the sustained-release amount is 1-2L each time, and the treatment lasts for three months.
The beneficial effects of the above technical scheme are: the slow release amount is combined with the treatment frequency, and the cost and the labor intensity are saved on the basis of preparing the inorganic nano composite material with excellent quality.
As a more preferable technical scheme, the drip slow-release period is 7-9 months.
The beneficial effects of the above technical scheme are: the standing tree is treated in the vigorous growth period of the tree, the treatment speed is high, the produced inorganic nano composite material has good effect, and the reagent cost and the time cost are saved.
As a more preferable technical scheme, the drip slow-release flow rate is 0.01mL/s, namely 1-2 drops/s.
As a preferable technical scheme of the invention, the height of the slow release part from the ground is 20-60 cm.
As the preferable technical scheme of the invention, the depth of the pore channel is 3-4 cm, and the diameter of the pore channel is 3-6 mm.
As the preferable technical scheme of the invention, the pore channel and the axial direction of the tree form an included angle of 30-60 degrees.
The beneficial effects of the above technical scheme are: the angle is beneficial to the uniform slow release of the precursor in the standing tree, so that the prepared inorganic nano composite material has uniform texture.
As a preferred technical scheme of the invention, the pore canal is two symmetrical pore canals.
The beneficial effects of the above technical scheme are: the drop slow release is carried out simultaneously from the two symmetrical pore passages, so that the precursor is uniformly distributed in the standing tree, and the formed inorganic nano composite material has uniform texture.
As a preferable technical scheme, the fast-growing forest wood is selected from one or more of poplar, eucalyptus and fir.
The invention principle is as follows:
starting from the process of forming trees, the tetraethoxysilane solution is slowly conveyed to the xylem of the standing tree in a drip slow-release mode, the precursor flows to each part along with the sap by utilizing the transpiration effect of the standing tree, and then the tetraethoxysilane solution is hydrolyzed and condensed in the tree by utilizing free water and bound water to generate silicon dioxide nano particles, so that the wood/silicon dioxide nano composite material is generated in the wood matrix.
According to the technical scheme, the invention discloses and provides a method for inducing standing trees to produce wood/inorganic nano composite materials. Compared with the prior art, the invention has the following beneficial effects:
(1) the inorganic nano composite material obtained by the invention has the advantages of compact structure after modification, small specific volume of the conduit, increased density, increased compression strength of the transverse striation, increased hardness and wear resistance and increased silicon element content.
(2) Compared with the traditional impregnation method, the process of the invention is more moderate, and the obtained inorganic nano composite material has more uniform texture.
(3) The preparation method has the advantages of no environmental pollution, simple process and low energy consumption.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic illustration of the slow release of Living wood induced to produce a wood/inorganic nanocomposite material according to the present invention.
FIG. 2 is a drawing showing a microtome of example 1 and untreated poplar; wherein FIG. 2a (4X) is a cross section of untreated poplar; FIG. 2b (4X) shows a cross section of poplar treated with 1mmol/L ethyl orthosilicate; FIG. 2c (4X) shows cross sections of poplar treated with 10mmol/L tetraethoxysilane; FIG. 2d (4X) is a cross section of poplar treated with 100mmol/L ethyl orthosilicate; NW is newly formed wood, PW is the wood grown in the past year, and IP is the starting point of slow release; v is a catheter, F is a fiber, and R is a wood ray.
FIG. 3 is an SEM photograph of example 1 and untreated poplar; wherein, FIG. 3a (500X) and FIG. 3e (2000X) are cross sections of untreated poplar; FIG. 3b (2000X), FIG. 3f (10000X) is 1mmol/L of ethyl orthosilicate-treated cross section of poplar, and V is a duct; FIG. 3c (2000X), FIG. 3g (5000X) is 10mmol/L of ethyl orthosilicate-treated cross section of poplar, and F is fiber; FIG. 3d (2000X), FIG. 3h (10000X) is 100mmol/L of cross section of poplar treated with tetraethoxysilane, and R is a wood ray; the red circles refer to the inclusion distribution areas.
FIG. 4 is an EDS energy spectrum of poplar treated with 10mmol/L tetraethoxysilane in example 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The embodiment of the invention discloses a method for inducing standing trees to produce wood/inorganic nano composite materials, relating to a reagent source which is not specifically limited, and the method which is not mentioned is a conventional experimental method. The preparation method comprises the following steps:
(1) and in 7-9 months, selecting the fast-growing forest wood standing timber with good growth condition to obtain the wood substrate to be treated. Drilling two symmetrical pore channels from bark to xylem at the position 20-60 cm away from the ground of a main trunk of a wood matrix to be treated to serve as slow release parts; the pore channel and the axial direction of the tree form an included angle of 30-60 degrees; the depth of the pore channel is 3-4 cm, and the diameter of the pore channel is 3-6 mm.
(2) Respectively preparing 1-100 mmol L-1And (5) obtaining a precursor by using an ethyl orthosilicate solution. The solvent is a volatile pollution-free organic solvent, preferably ethanol or diethyl ether, and the dissolving method comprises the steps of adding tetraethoxysilane into the solvent and magnetically stirring at normal temperature for 5-10 min.
(3) And conveying 1-2L of the precursor to xylem at a slow-release flow rate of 0.01mL/s by using a drip slow-release method. The treatment is carried out once a week for three months to obtain the wood inorganic nano composite material (see attached figure 1).
Example 1
(1) And 7, 3 days after 7 months, selecting the living poplar stumpage with good growth condition to obtain the wood substrate to be treated. Drilling two symmetrical pore channels from bark to xylem at the position 40cm away from the ground of a main trunk of a wood matrix to be treated as a slow release part; the pore canal and the axial direction of the tree form an included angle of 45 degrees; the depth of the pore canal is 3.5cm, and the diameter of the pore canal is 5 mm.
(2) 1mmol L of the resulting product was prepared-1、10mmol L-1、100mmol L-1And (5) obtaining a precursor by using an ethyl orthosilicate solution. In the embodiment, the solvent is absolute ethyl alcohol, tetraethoxysilane is added into the absolute ethyl alcohol, and the mixture is filled into an infusion bag after being magnetically stirred at normal temperature for 5-10 min.
(3) Respectively suspending precursors with different concentrations on the sunny sides of living poplar trees, inserting a slow-release needle into the pore canal in the step 1, controlling the flow rate at 0.01mL/s (one drop per second), and then starting slow-release treatment. Treating once a week, slowly releasing 1L of precursor every time, and treating for three months to obtain the wood inorganic nano composite material.
Example 2
(1) And 7, 3 days after 7 months, selecting the eucalyptus stumpage with good growth condition to obtain the wood substrate to be treated. Drilling two symmetrical pore channels from bark to xylem at the position 20cm away from the ground of a main trunk of a wood matrix to be treated as a slow release part; the pore canal and the axial direction of the tree form an included angle of 30 degrees; the depth of the pore canal is 3cm, and the diameter of the pore canal is 3 mm.
(2) 1mmol L of the resulting product was prepared-1、10mmol L-1、100mmol L-1And (5) obtaining a precursor by using an ethyl orthosilicate solution. In the embodiment, the solvent is diethyl ether, tetraethoxysilane is added into the diethyl ether, and the mixture is filled into an infusion bag under the magnetic stirring at normal temperature for 5-10 min.
(3) Respectively suspending precursors with different concentrations on the sunny sides of different eucalyptus living woods, inserting a slow release needle into the pore channel in the step 1, controlling the flow rate to be 0.01mL/s (one drop per second), and then starting slow release treatment. The wood inorganic nano composite material is treated once a week, 1.5L of precursor is slowly released each time, and after three months of treatment, the wood inorganic nano composite material is obtained.
Example 3
(1) And 7, 3 days after 7 months, selecting the living standing fir trees with good growth conditions to obtain the wood matrix to be treated. Drilling two symmetrical pore channels from bark to xylem at the position 60cm away from the ground of a main trunk of a wood matrix to be treated as a slow release part; the pore canal and the axial direction of the tree form an included angle of 60 degrees; the depth of the pore channel is 4cm, and the diameter of the pore channel is 6 mm.
(2) 1mmol L of the resulting product was prepared-1、10mmol L-1、100mmol L-1And (5) obtaining a precursor by using an ethyl orthosilicate solution. In the embodiment, the solvent is absolute ethyl alcohol, tetraethoxysilane is added into the absolute ethyl alcohol, and the mixture is filled into an infusion bag after being magnetically stirred at normal temperature for 5-10 min.
(3) Respectively suspending precursors with different concentrations on the sunny sides of live stumpage trees of different fir trees, inserting a slow-release needle into the pore canal in the step 1, controlling the flow rate at 0.01mL/s (one drop per second), and then starting slow-release treatment. The wood inorganic nano composite material is treated once a week, 2L of precursor is slowly released each time, and after three months of treatment, the wood inorganic nano composite material is obtained.
Effect example 1
The three wood inorganic nanocomposites obtained in example 1 were tested.
After the standing tree subjected to slow release treatment is cut off, the edge wood of the heart of the cross section is not clearly distinguished, a dark color area which is unevenly diffused from the medulla to the outside appears, and obvious strip-shaped extension is formed along the slow release direction (see attached figure 1).
After slicing, microscopic observation shows that the untreated poplar slices have no other inclusions except cell wall substances. The composite material formed by the treatment of the embodiment 1 keeps the pore structure of wood, the pore diameter becomes small, the specific amount of the conduit tissue is reduced, a compact structure appears, and the specific amount of the fiber tissue is increased. The section area of the slice was yellow brown and analyzed for inclusions of the precursor in the wood (see fig. 2).
The analysis of a scanning electron microscope shows that the inner wall of the cells in the untreated poplar is smooth and has no inclusion. Through 1mmol L of-1The composite material obtained by processing tetraethoxysilane has blocky inclusion inside the conduit, the blocky inclusion is composed of nano-scale particles, and the inner wall of the conduit is attached with nano-particles. Through 10mmol L of-1And 100mmol L-1In the composite material obtained by the treatment of tetraethoxysilane, spherical particles appear in fiber cells, and the cross section of the particles is smooth (see figure 3).
The element composition is C, Si, O, K and Ca (see figure 4) by EDS energy spectrum analysis.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A method for inducing standing wood to produce wood/inorganic nano composite material is characterized in that tetraethoxysilane solution is used as a precursor, fast-growing forest wood standing wood is used as a wood matrix to be treated, a pore channel from bark to xylem is drilled on a trunk of the wood matrix to be treated to serve as a slow release part, and the precursor is conveyed to the xylem from the slow release part by using a drip slow release method to obtain the inorganic nano composite material.
2. The method for inducing standing wood to produce wood/inorganic nanocomposite material according to claim 1, wherein the concentration of the tetraethoxysilane solution is 1-100 mmol L-1。
3. The method for inducing the living standing wood to produce the wood/inorganic nanocomposite material as claimed in claim 1, wherein the frequency of the drip slow release treatment is once per week, and the slow release amount is 1-2L each time, and the period is three months.
4. The method for inducing standing wood to produce the wood/inorganic nanocomposite material as claimed in claim 3, wherein the drip release period is 7-9 months.
5. The method for inducing the production of wood/inorganic nanocomposite material from standing wood according to claim 3, wherein the drip slow release flow rate is 0.01 mL/s.
6. The method for inducing the standing wood to produce the wood/inorganic nanocomposite material as claimed in claim 1, wherein the height of the slow release part from the ground is 20-60 cm.
7. The method for inducing standing wood to produce wood/inorganic nanocomposite material according to claim 1, wherein the depth of the pore channel is 3-4 cm, and the diameter of the pore channel is 3-6 mm.
8. The method for inducing standing wood to produce wood/inorganic nanocomposite as claimed in claim 1, wherein the channels form an angle of 30-60 ° with the axial direction of the wood.
9. The method of inducing viable standing wood to produce wood/inorganic nanocomposite as claimed in claim 1, wherein said fast-growing wood is selected from one or more of poplar, eucalyptus and fir.
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Citations (6)
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| CN101134330A (en) * | 2007-09-14 | 2008-03-05 | 广西大学 | Silicon dioxide/timber composite material manufacturing method |
| CN101164744A (en) * | 2007-09-19 | 2008-04-23 | 中国林业科学研究院木材工业研究所 | Method for preparing ceramic composite wood |
| CN101861804A (en) * | 2009-04-14 | 2010-10-20 | 李得勇 | Ecological organic improving technology of living woods |
| CN104385404A (en) * | 2014-10-13 | 2015-03-04 | 湖南省林业科学院 | Living anticorrosive timber, and anticorrosion modifier and making method thereof |
| CN104982243A (en) * | 2015-02-26 | 2015-10-21 | 北华大学 | Standing modified timber, standing timber modifier, and preparation methods thereof |
| CN110419353A (en) * | 2019-07-08 | 2019-11-08 | 内蒙古农业大学 | A kind of new function type timber and the preparation method and application thereof |
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2021
- 2021-01-18 CN CN202110063855.9A patent/CN112825698A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101134330A (en) * | 2007-09-14 | 2008-03-05 | 广西大学 | Silicon dioxide/timber composite material manufacturing method |
| CN101164744A (en) * | 2007-09-19 | 2008-04-23 | 中国林业科学研究院木材工业研究所 | Method for preparing ceramic composite wood |
| CN101861804A (en) * | 2009-04-14 | 2010-10-20 | 李得勇 | Ecological organic improving technology of living woods |
| CN104385404A (en) * | 2014-10-13 | 2015-03-04 | 湖南省林业科学院 | Living anticorrosive timber, and anticorrosion modifier and making method thereof |
| CN104982243A (en) * | 2015-02-26 | 2015-10-21 | 北华大学 | Standing modified timber, standing timber modifier, and preparation methods thereof |
| CN110419353A (en) * | 2019-07-08 | 2019-11-08 | 内蒙古农业大学 | A kind of new function type timber and the preparation method and application thereof |
Non-Patent Citations (1)
| Title |
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| 苏润洲等: "生物矿化合成木材-SiO2复合材料的XPS分析", 《东北林业大学学报》 * |
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Application publication date: 20210525 |