CN110154183A - A kind of preparation method of ultraviolet shielded transparent timber - Google Patents

A kind of preparation method of ultraviolet shielded transparent timber Download PDF

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Publication number
CN110154183A
CN110154183A CN201910513438.2A CN201910513438A CN110154183A CN 110154183 A CN110154183 A CN 110154183A CN 201910513438 A CN201910513438 A CN 201910513438A CN 110154183 A CN110154183 A CN 110154183A
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CN
China
Prior art keywords
timber
ultraviolet shielded
ultraviolet
sample
light transmittance
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910513438.2A
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Chinese (zh)
Inventor
殷学风
范晶
田杏欢
林涛
袁枚
李静
王忠祥
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Shaanxi University of Science and Technology
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Shaanxi University of Science and Technology
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Priority to CN201910513438.2A priority Critical patent/CN110154183A/en
Publication of CN110154183A publication Critical patent/CN110154183A/en
Pending legal-status Critical Current

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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
    • B27K3/02—Processes; Apparatus
    • B27K3/0207—Pretreatment of wood before 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
    • B27K3/16—Inorganic impregnating agents
    • B27K3/20—Compounds of alkali metals or ammonium
    • 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
    • B27K3/16—Inorganic impregnating agents
    • B27K3/32—Mixtures of different inorganic 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
    • B27K3/34—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
    • B27K3/34—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
    • B27K5/0005—Cryogenic treatment
    • 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
    • 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
    • B27K2240/90—UV-protection

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

A kind of preparation of ultraviolet shielded transparent timber, wood sample, which is first carried out pretreatment, makes its profit rise, and is then handled with sodium chlorite and glacial acetic acid, by controlling delignification process, obtains the timber substrate of different lignin contents；Sample is carried out dehydrating using organic solvent gradient method, freeze-drying or supercritical drying, further obtains the timber substrate of dewatered different lignin contents；It is impregnated with the prepolymer of fiber refractive index close and high optics light transmittance, is then solidified.By probing into the ultraviolet shielded property of the different transparent timber of lignin content, a kind of transparent timber with ultraviolet shielding function is obtained.Ultraviolet shielded transparent timber is obtained with fabulous UV-screening properties and high translucency, wherein ultraviolet shielded effect has reached 90%, and light transmittance has reached 73% or more.

Description

A kind of preparation method of ultraviolet shielded transparent timber
Technical field
The invention belongs to wood technologies exploitation and technical field of modification, and in particular to a kind of system of ultraviolet shielded transparent timber Preparation Method.
Background technique
Timber is a kind of natural macromolecular material with anisotropic, mainly by cellulose, hemicellulose and lignin group At.Wherein cellulose orderly extends along plant growth direction, and lignin and half fiber element are distributed in together as filler and adhesive Between the microfibre and intercellular layer of cell wall, flanking cell is bonded together, assign cell and plant it is very big machinery it is strong Degree.
, mainly there is a two o'clock in the technical issues of the present invention is directed to prepare a kind of ultraviolet shielded transparent timber, relate generally to, and one It is the ultraviolet shielded property regulation of timber, the other is the timber light transmission of timber is modified.
Timber to high translucency and good ultraviolet shielded property, then need first to timber carry out component tune Control, the appropriate chromophoe constituent except in timber, the i.e. components such as the lignin containing chromophoric group and pectin, tannin, states mentioned then up And go in chromophoe constituent material be added with the high light transmission upgrading component of cellulose refractive index close, it is high that timber on the one hand can be achieved On the other hand translucency and uv-shielding capacity can assign timber high strength character.
Currently, both at home and abroad with regard to transparent timber correlative study it is fewer and fewer, and the existing research about transparent timber its Preparation time is longer.The present invention greatly shortens preparation time, and the machinery of made transparent timber during timber transparence It has excellent performance, light transmittance has high market application value up to 85% or more.
About the ultraviolet shielded property of transparent timber, at present both at home and abroad also without relevant article or report.Prepared by the present invention Ultraviolet shielded transparent timber not only translucency with higher, but also there is good ultraviolet shielding function, can shield well Cover ultraviolet light, can using in life and production.
In conclusion ultraviolet shielded transparent timber prepared by the present invention, not only appearance looks elegant high light transmission, but also can be used as Construction material shielding ultraviolet rays have good social value, more there is higher economic value.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the object of the present invention is to provide a kind of systems of ultraviolet shielded transparent timber Standby, by wood components tune, polymer impregnates modification, solidification, prepares a kind of ultraviolet shielded transparent timber.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of preparation method of ultraviolet shielded transparent timber, comprising the following steps:
1) first thin slice of wood sample being pre-processed, pretreatment mode is that sodium hydroxide moistens processing of rising, timber duct is opened, Its specific process is as follows:
First sample (thin slice of wood) is placed in the closed container equipped with boiling water, makes wood chip using steam and high temperature liquid water Quick humidification；
Sample after wetting is put into 3%-10% sodium hydroxide solution and is pre-processed, 70 DEG C -100 DEG C for the treatment of temperature, reacts 1- 2h is rinsed with deionized water to neutrality later；
It 2) is 3%-10% chlorite sodium with mass fraction by the pretreated sample of step 1), glacial acetic acid is handled, pH 3-6, The degree that delignification is realized by the time of control processing, sets the reaction time as 0.5-4 h, is rinsed later with deionized water To neutrality, the timber substrate with lignin content is obtained；
3) then timber substrate is dehydrated sample using organic solvent gradient method, freeze-drying or supercritical drying Processing, further obtains dewatered timber substrate；
4) it finally selects with fiber refractive index close and the polymer impregnated wood substrate 4-8h of high optics light transmittance, 50-70 DEG C Lower solidification obtains a kind of ultraviolet shielded transparent timber.
Organic solution is 40% ethyl alcohol or 60% ethyl alcohol or 80% ethyl alcohol or straight alcohol or second in the solvent gradient method Alcohol: acetone 1:1 or acetone.
Described is polymethyl methacrylate, benzene second with the polymer of fiber refractive index close and high optics light transmittance Or mixtures thereof alkene, epoxy resin, gaultherolin etc..
The beneficial effects of the present invention are:
1) growthform that the present invention still maintains timber natural；
2) present invention has the optics light transmittance higher than 73% or more；
3) present invention has UV-screening properties, can shield substantially and injure maximum medium wave (290 ~ 320nm) ultraviolet light to people, subtract Few ultraviolet light causes harm to the human body；
4) present invention has good mechanical characteristic, drop resistant；
5) invention increases the added values of timber application, provide good social application value for renewable timber.
Detailed description of the invention
Fig. 1 is light transmittance of the transparent timber of different lignin contents in ultra-violet (UV) band wave band.
Fig. 2 is light transmittance of the transparent timber of different lignin contents in visible region wave band.
The ultraviolet ultraviolet shielded transparent timber of the property (lignin content: 6.68%) of Fig. 3.
Specific embodiment
The present invention is further discussed below with reference to embodiments, but the present invention is not limited to following embodiment.
Embodiment 1
(1) first sample is immersed in 5% sodium hydroxide solution, reacts 80min at 100 DEG C；
(2) will pretreatment treated that sample is washed till neutrality, being put into enough mass fractions is 7% chlorite sodium, acid condition Under (pH 4) handle, handling duration 1h, measure lignin content be 6.68%；
(3) will treated timber distilled water flushing to neutrality, then use organic solvent gradient method (40% ethyl alcohol, 60% second Alcohol, 80% ethyl alcohol, straight alcohol, ethyl alcohol: acetone 1:1, pure acetone, do not cause polymerization maceration extract monomer) be carried out dehydrating；
(4) then will decolourize timber pickling 4h in prepolymerized methyl methacrylate (MMA), solidify at 50 DEG C, obtain one The ultraviolet shielded transparent timber of kind.
The ultraviolet shielded transparent timber of gained the light transmittance of shortwave and medium wave ultraviolet region (200nm~320nm) 5% with Under, it is 10% in the light transmittance of long wave ultraviolet light area (320nm~400nm), in the light transmittance of visible region (400nm~800nm) It is 73.46%.Such as Fig. 1, Fig. 2 and table 1.Fig. 3 is ultraviolet shielded transparent timber pictorial diagram.
Embodiment 2
Prepare ultraviolet shielded transparent timber, comprising the following steps:
(1) first sample is immersed in 5% sodium hydroxide solution, reacts 80min at 100 DEG C；
(2) will pretreatment treated that sample is washed till neutrality, being put into enough mass fractions is 7% chlorite sodium, acid condition Under (pH 4) handle, handling duration 1.5h, measure lignin content be 2.36%；
(3) will treated timber distilled water flushing to neutrality, then use organic solvent gradient method (40% ethyl alcohol, 60% second Alcohol, 80% ethyl alcohol, straight alcohol, ethyl alcohol: acetone 1:1, pure acetone, do not cause polymerization maceration extract monomer) be carried out dehydrating；
(4) then will decolourize timber pickling 4h into prepolymerized MMA, solidify at 50 DEG C, obtain a kind of ultraviolet shielded transparent wood Material.
The ultraviolet shielded transparent timber of gained the light transmittance of shortwave and medium wave ultraviolet region (200nm~320nm) 5% with Under, it is 40% in the light transmittance of long wave ultraviolet light area (320nm~400nm), in the light transmittance of visible region (400nm~800nm) It is 78.35%.Such as Fig. 1, Fig. 2 and table 1.
Embodiment 3
Prepare ultraviolet shielded transparent timber, comprising the following steps:
(1) first sample is immersed in 5% sodium hydroxide solution, reacts 80min at 100 DEG C；
(2) will pretreatment treated that sample is washed till neutrality, being put into enough mass fractions is 7% chlorite sodium, acid condition Under (pH 4) handle, handling duration 2h, measure lignin content be 0.23%；
(3) will treated timber distilled water flushing to neutrality, then use organic solvent gradient method (40% ethyl alcohol, 60% second Alcohol, 80% ethyl alcohol, straight alcohol, ethyl alcohol: acetone 1:1, pure acetone, do not cause polymerization maceration extract monomer) be carried out dehydrating；
(4) then will decolourize timber pickling 4h into prepolymerized MMA, solidify at 50 DEG C, obtain a kind of ultraviolet shielded transparent wood Material.
The ultraviolet shielded transparent timber of gained the light transmittance of shortwave and medium wave ultraviolet region (200nm~320nm) 5% with Under, it is 53% in the light transmittance of long wave ultraviolet light area (320nm~400nm), in the light transmittance of visible region (400nm~800nm) It is 80.23%.Such as Fig. 1, Fig. 2 and table 1.
Embodiment 4
Prepare ultraviolet shielded transparent timber, comprising the following steps:
(1) first sample is immersed in 5% sodium hydroxide solution, reacts 80min at 100 DEG C；
(2) will pretreatment treated that sample is washed till neutrality, being put into enough mass fractions is 7% chlorite sodium, acid condition Under (pH 4) handle, handling duration 2.5h, measure lignin content be 0.15%；
(3) will treated timber distilled water flushing to neutrality, then use organic solvent gradient method (40% ethyl alcohol, 60% second Alcohol, 80% ethyl alcohol, straight alcohol, ethyl alcohol: acetone 1:1, pure acetone, do not cause polymerization maceration extract monomer) be carried out dehydrating；
(4) then will decolourize timber pickling 4h into prepolymerized MMA, solidify at 50 DEG C, obtain a kind of ultraviolet shielded transparent wood Material.
The ultraviolet shielded transparent timber of gained the light transmittance of shortwave and medium wave ultraviolet region (200nm~320nm) 5% with Under, it is 58% in the light transmittance of long wave ultraviolet light area (320nm~400nm), in the light transmittance of visible region (400nm~800nm) It is 82.15%.Such as Fig. 1, Fig. 2 and table 1.
。

Claims (3)

1. a kind of preparation method of ultraviolet shielded transparent timber, which comprises the following steps:
1) first thin slice of wood sample is pre-processed, pretreatment mode is that sodium hydroxide solution moistens the method that rises, specific process It is as follows:
First sample (thin slice of wood) is placed in the closed container equipped with boiling water, keeps wood chip fast using steam and high temperature liquid water Speed wetting；
Sample after wetting is put into 3%-10% sodium hydroxide solution and is pre-processed, 70 DEG C -100 DEG C for the treatment of temperature, reacts 1- 2h is rinsed with deionized water to neutrality later；
It 2) is 3%-10% chlorite sodium with mass fraction by the pretreated sample of step 1), glacial acetic acid is handled, pH 3-6, The degree that delignification is realized by the time of control processing, sets the reaction time as 0.5-4 h, is rinsed later with deionized water To neutrality, the timber substrate with lignin content is obtained；
3) then timber substrate is dehydrated sample using organic solvent gradient method, freeze-drying or supercritical drying Processing, further obtains dewatered timber substrate；
4) it finally selects with fiber refractive index close and the polymer impregnated wood substrate 4-8h of high optics light transmittance, 50-70 DEG C Lower solidification obtains a kind of ultraviolet shielded transparent timber.
2. the preparation method of the ultraviolet shielded transparent timber of one kind according to claim 1, which is characterized in that the machine is molten Organic solution is 40% ethyl alcohol or 60% ethyl alcohol or 80% ethyl alcohol or straight alcohol or ethyl alcohol: acetone 1:1 or acetone in agent gradient method.
3. the preparation method of the ultraviolet shielded transparent timber of one kind according to claim 1, which is characterized in that described with fibre The polymer for tieing up refractive index close and high optics light transmittance is polymethyl methacrylate, styrene, epoxy resin, salicylic acid first Or mixtures thereof ester etc..
CN201910513438.2A 2019-06-14 2019-06-14 A kind of preparation method of ultraviolet shielded transparent timber Pending CN110154183A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110978183A (en) * 2019-12-24 2020-04-10 南京林业大学 Preparation method of transparent bamboo wood and prepared transparent bamboo wood
CN111393821A (en) * 2020-03-20 2020-07-10 刘丹 Mobile phone protection shell and manufacturing method thereof
CN111702902A (en) * 2020-06-24 2020-09-25 王怀远 Preparation method of wood-based selective near-infrared absorbing material
CN112140264A (en) * 2020-09-23 2020-12-29 佛山(华南)新材料研究院 Transparent cellulose composite material and preparation method thereof
CN113771166A (en) * 2021-09-29 2021-12-10 东北林业大学 Preparation method of switchable energy-consumption-free refrigeration and heating heat management wood
CN113967953A (en) * 2021-09-15 2022-01-25 阜南县永盛工艺品有限公司 Transparent wood processing technology for manufacturing high-transmittance wood artware

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004202925A (en) * 2002-12-26 2004-07-22 Takemoto Oil & Fat Co Ltd Coating liquid for glossy layer of ink jet recording medium, and ink jet recording medium
CN108699420A (en) * 2016-02-04 2018-10-23 马里兰大学学院市分校 Transparent wood composites, system and manufacturing method
CN109514665A (en) * 2019-01-15 2019-03-26 林诗琦 A kind of preparation of the transparent timber of higher curvature
CN109702839A (en) * 2019-01-14 2019-05-03 陕西科技大学 A kind of preparation of the transparent timber of curved surface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004202925A (en) * 2002-12-26 2004-07-22 Takemoto Oil & Fat Co Ltd Coating liquid for glossy layer of ink jet recording medium, and ink jet recording medium
CN108699420A (en) * 2016-02-04 2018-10-23 马里兰大学学院市分校 Transparent wood composites, system and manufacturing method
CN109702839A (en) * 2019-01-14 2019-05-03 陕西科技大学 A kind of preparation of the transparent timber of curved surface
CN109514665A (en) * 2019-01-15 2019-03-26 林诗琦 A kind of preparation of the transparent timber of higher curvature

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110978183A (en) * 2019-12-24 2020-04-10 南京林业大学 Preparation method of transparent bamboo wood and prepared transparent bamboo wood
CN111393821A (en) * 2020-03-20 2020-07-10 刘丹 Mobile phone protection shell and manufacturing method thereof
CN111702902A (en) * 2020-06-24 2020-09-25 王怀远 Preparation method of wood-based selective near-infrared absorbing material
CN112140264A (en) * 2020-09-23 2020-12-29 佛山(华南)新材料研究院 Transparent cellulose composite material and preparation method thereof
CN113967953A (en) * 2021-09-15 2022-01-25 阜南县永盛工艺品有限公司 Transparent wood processing technology for manufacturing high-transmittance wood artware
CN113771166A (en) * 2021-09-29 2021-12-10 东北林业大学 Preparation method of switchable energy-consumption-free refrigeration and heating heat management wood

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Application publication date: 20190823