CN108393983A - A kind of photocatalyst-type removes the preparation method of aldehyde plank - Google Patents

A kind of photocatalyst-type removes the preparation method of aldehyde plank Download PDF

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Publication number
CN108393983A
CN108393983A CN201810296989.3A CN201810296989A CN108393983A CN 108393983 A CN108393983 A CN 108393983A CN 201810296989 A CN201810296989 A CN 201810296989A CN 108393983 A CN108393983 A CN 108393983A
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CN
China
Prior art keywords
plank
mixed solution
preparation
modifying agent
photocatalyst
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Pending
Application number
CN201810296989.3A
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Chinese (zh)
Inventor
李荣荣
徐伟
熊先青
方露
顾颜婷
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Nanjing Forestry University
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Nanjing Forestry University
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Publication date
Application filed by Nanjing Forestry University filed Critical Nanjing Forestry University
Priority to CN201810296989.3A priority Critical patent/CN108393983A/en
Publication of CN108393983A publication Critical patent/CN108393983A/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
    • B27K3/08—Impregnating by pressure, e.g. vacuum impregnation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
    • 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
    • B27K5/04—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
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/06—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by burning or charring, e.g. cutting with hot wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20707—Titanium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/80—Type of catalytic reaction
    • B01D2255/802—Photocatalytic

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Biomedical Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Catalysts (AREA)

Abstract

The present invention relates to the preparation method that a kind of photocatalyst-type removes aldehyde plank, step includes:Plank pretreatment is handled, dry and charing with panel modifying agent, impregnating by pressure, wherein the preparation method of plank modifying agent is that 2400ml absolute ethyl alcohols are added in 116ml glacial acetic acid, after being sufficiently mixed uniformly, the butyl titanate of 684ml is added thereto, then add 20ml acetylacetone,2,4-pentanediones, it is sufficiently stirred 50min using magnetic stirring apparatus, forms mixed solution A；36ml deionized waters and 400ml absolute ethyl alcohols are mixed to form mixed solution B；Mixed solution A is slowly added dropwise in mixed solution B, plank modifying agent is obtained after ageing.The present invention can reduce the pollution of organic volatile in indoor environment, have many advantages, such as that photocatalytic activity is good, and Degradation Formaldehyde rate is high and board dimension stability is good.

Description

A kind of photocatalyst-type removes the preparation method of aldehyde plank
Technical field
The present invention relates to a kind of preparation methods except aldehyde plank, more particularly to a kind of photocatalyst-type to remove the preparation side of aldehyde plank Method belongs to the preparation field of composite wooden material.
Background technology
Timber as a kind of resource of natural reproducible, and with beautiful texture, color and luster is natural, texture is comfortable, be easy to add The advantages that work, thus by the ideal material as construction and decoration and Furniture manufacture.But timber is inflammable and affected by environment very big, long Phase contacts with oxygen, light, moisture, and easy to change, cracking, rotten etc. are also easy to be encroached on by microorganism and insect.So to wood The modification of material is constantly subjected to extensive concern for a long time.
Timber is natural reproducible, environmentally protective as porous material, is the excellent carrier material of titanium deoxide catalyst Material, the principle of titanium dioxide optical catalyst material are to be excited to generate photo-generated carrier by light, can undergo two kinds of main variations Approach, first, hole-electron pair is compound, compound by surface recombination and inside, the electrons and holes being activated may be in particle Portion and inner surface nearby meet again, to release the energy absorbed in the form of light or heat；Second is that photoproduction current-carrying Son is captured and occurs redox reaction, is CO2, H2O most of organic pollutant degradations for being adsorbed on the surfaces TiO2, Organic pollution is oxidized to harmless object.
Invention content
The technical problem to be solved by the present invention is to, the shortcomings that overcoming the prior art, a kind of photocatalyst-type is provided and removes aldehyde plate The preparation method of material can reduce the pollution of organic volatile in environment, have photocatalytic activity good, Degradation Formaldehyde rate it is high and The advantages that board dimension stability is good.
In order to solve the above technical problems, the present invention provides the preparation method that a kind of photocatalyst-type removes aldehyde plank, including such as Lower step:
Step 1, plank pretreatment：After log peeling, cutting the specification that saw cuts open into required size, in 60~80 DEG C of water-bath Under the conditions of, handle 2~6h；Drying for the first time then is carried out to the plank after heating water bath, is 10 by its moisture content scope control ~13%；The channel of Wood moisture movement is dredged by hydrothermal pretreatment, enhances wood permeability, improves follow-up sol impregnation effect Fruit, for the first time drying are dried using cooling and drying benchmark.
Step 2,2400ml absolute ethyl alcohols are added in 116ml glacial acetic acid, after being sufficiently mixed uniformly, by the metatitanic acid fourth of 684ml Above-mentioned solution is added in ester, then adds 20ml acetylacetone,2,4-pentanediones, mixed solution A is formed, by above-mentioned mixed solution A in magnetic agitation It is sufficiently stirred 50min in device, then carries out 36ml water and 400ml ethyl alcohol to be mixed to form mixed solution B, is being sufficiently stirred Mixed solution B is slowly added in complete mixed solution A, total time for adding is controlled in 70-90min.It then passes through and is aged to obtain the final product To plank modifying agent.；
Step 3, impregnating by pressure processing：Plank modifying agent made from plank made from step 1 and step 2 is put into pressurized tank Middle progress impregnating by pressure processing vacuumizes so that the vacuum degree in pressurized tank is maintained within the scope of 1.2~1.8MPa, pressing time For 1~2h；Subsequent slow pressure release, venting duration control take out plank after 30-60min, complete pressure release；Go to step 4：
Step 4, passing through step 3, treated that plank is put into baking oven, under the conditions of 80 DEG C, dries 5 hours, then again will It, which is put into climatic chamber, carries out conditioning, and relative humidity is 65% in climatic chamber, and temperature is 20 DEG C, processing time For 48 hours to get the tentatively modified plank for being 10~13% to moisture content, with improve subsequent product dimensional stability and Photocatalysis performance；Go to step 5；
Tentatively modified plank is placed in retort by step 5, under nitrogen protection high temperature carbonization, carbonization temperature 460 ~600 DEG C, carbonization time is 30~90min to get to finally modified plank.In carbonization process, TiO2Crystal form occurs to turn Become, improves catalytic activity.
The technical solution that the present invention further limits is：
Further, the specification of required size is 400mm*30mm*10mm (longitudinal * radial directions * is tangential).
Further, it is 60~80min that the time for adding in mixed solution B, which is slowly added dropwise, in mixed solution A.
The beneficial effects of the invention are as follows：The present invention can efficiently be made using artificial fast-growing forest timber as raw material by the invention Standby wood based titanium dioxide catalysis material, greatly improves added value of product, product size stability and photocatalysis efficiency, together When reach material dicoration with functional phase uniformly.
Description of the drawings
Fig. 1 is the process flow chart of preparation process of the present invention.
Specific implementation mode
Embodiment 1
A kind of photocatalyst-type provided in this embodiment removes the preparation method of aldehyde plank, includes the following steps：
Step 1, plank pretreatment：After log peeling, cutting the specification that saw cuts open into required size, the specification of required size is 400mm*30mm*10mm (longitudinal * radial directions * is tangential).Under 80 DEG C of water bath condition, hydro-thermal process 2h；Then to heating water bath Plank afterwards carries out drying for the first time, is 10~13% by its moisture content scope control；Timber water is dredged by hydrothermal pretreatment Point mobile channel, enhances wood permeability, improves follow-up sol impregnation effect, it is dry for the first time using cooling and drying benchmark into Row drying, referring to table 1.
Step 2 matches panel modifying agent：2400ml absolute ethyl alcohols are added in 116ml glacial acetic acid, are sufficiently mixed uniformly Afterwards, the butyl titanate of 684ml is added thereto, then adds 20ml acetylacetone,2,4-pentanediones, is sufficiently stirred using magnetic stirring apparatus 50min forms mixed solution A；36ml deionized waters and 400ml absolute ethyl alcohols are mixed to form mixed solution B；By mixed solution A is slowly added dropwise in mixed solution B, and time for adding 70min obtains plank modifying agent after ageing；
Step 3, impregnating by pressure processing：Plank modifying agent made from plank made from step 1 and step 2 is put into pressurized tank Middle progress impregnating by pressure processing vacuumizes so that the vacuum degree in pressurized tank is maintained within the scope of 1.4MPa, pressing time 1h； Subsequent slow pressure release, venting duration control take out plank after 40min, complete pressure release；Go to step 4：
Step 4, passing through step 3, treated that plank is put into baking oven, under the conditions of 80 DEG C, dries 5 hours, then again will It, which is put into climatic chamber, carries out conditioning, and relative humidity is 65% in climatic chamber, and temperature is 20 DEG C, processing time For 48 hours to get the tentatively modified plank for being 10~13% to moisture content, with improve subsequent product dimensional stability and Photocatalysis performance；Baking oven and climatic chamber model are respectively that fast electric drying oven with forced convection (GZX-9246MBE) and south are won in Shanghai Capital Stettlen climatic chamber (HS-225).Go to step 5；.
Tentatively modified plank is placed in retort by step 5, under nitrogen protection high temperature carbonization, carbonization temperature 460 DEG C, carbonization time is 75min to get to finally modified plank.In carbonization process, TiO2Crystal transfer occurs, raising is urged Change activity.
In the environment of relative humidity is 32% indoors, by two pieces by photocatalyst-type except the size of aldehyde processing is 400mm* The plank of 30mm*10mm (longitudinal * radial directions * is tangential) simultaneously drains into the hermetical testing cavity containing a certain concentration formaldehyde, gas phase Chromatography measures different moments, concentration of formaldehyde in cavity, average Degradation Formaldehyde rate is calculated, referring to table 2.Meanwhile board dimension Stablize, plank difference dry shrinkage rate that treated is 1.45, and the plank difference dry shrinkage rate than untreated greenwood reduces by 0.51.By reality It is good to test a kind of visible preparation method photocatalytic activity that photocatalyst-type removes aldehyde plank provided by the invention of result, Degradation Formaldehyde rate Height, and board dimension stability is good.
1 plank cooling and drying master meter of table
The wooden based titanium dioxide catalysis material Degradation Formaldehyde rate of table 2
Concentration of formaldehyde (mg/m3) 0.08 0.80 0.16
Degradation rate (μ g/min) 0.1 1.5 2.1
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape At technical solution, fall within the scope of protection required by the present invention.

Claims (3)

1. a kind of photocatalyst-type removes the preparation method of aldehyde plank, it is characterised in that, include the following steps:
Step 1, plank pretreatment：After log peeling, cutting the specification that saw cuts open into required size, it is put into 60~80 DEG C of water-bath item Under part, heat 2~6h；Drying for the first time then is carried out to the plank after heating water bath, is by its moisture content scope control 10~13%；
Step 2 matches panel modifying agent：2400ml absolute ethyl alcohols are added in 116ml glacial acetic acid, will after being sufficiently mixed uniformly Above-mentioned solution is added in the butyl titanate of 684ml, then adds 20ml acetylacetone,2,4-pentanediones, forms mixed solution A, and above-mentioned mixing is molten Liquid A is sufficiently stirred 50min in magnetic stirring apparatus, then carries out 36ml water and 400ml ethyl alcohol to be mixed to form mixed solution B, Be sufficiently stirred in the mixed solution A finished and be slowly added to mixed solution B, the control of total time for adding in 70~90min, with Afterwards plank modifying agent is obtained by ageing；
Step 3, impregnating by pressure processing：By plank modifying agent made from plank made from step 1 and step 2 be put into pressurized tank into The processing of row impregnating by pressure, by booster pump so that the pressure in pressurized tank is maintained within the scope of 1.2~1.8MPa, pressing time is 1~2h；Subsequent slow pressure release, venting duration control take out plank after 30-60min, complete pressure release；Go to step 4：
Step 4, passing through step 3, treated that plank is put into baking oven, under the conditions of 80 DEG C, dries 5 hours, is then put again Enter and carry out conditioning in climatic chamber, relative humidity is 65% in climatic chamber, and temperature is 20 DEG C, processing time 48 Hour is to get the tentatively modified plank for being 10~13% to moisture content；Go to step 5；
Tentatively modified plank is placed in retort by step 5, under nitrogen protection high temperature carbonization, and carbonization temperature is 460~ 600 DEG C, carbonization time is 30~90min to get to finally modified plank.
2. a kind of photocatalyst-type according to claim 1 removes the preparation method of aldehyde plank, it is characterised in that：Ruler needed for described Very little specification is 400mm*30mm*10mm.
3. a kind of photocatalyst-type according to claim 1 removes the preparation method of aldehyde plank, it is characterised in that：The mixing is molten It is 60~80min that the time for adding in mixed solution B, which is slowly added dropwise, in liquid A.
CN201810296989.3A 2018-03-30 2018-03-30 A kind of photocatalyst-type removes the preparation method of aldehyde plank Pending CN108393983A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110479307A (en) * 2019-09-24 2019-11-22 浙江农林大学 A kind of efficiently durable wood-based composite material and preparation method except formaldehyde
CN112361742A (en) * 2020-09-16 2021-02-12 广州市佤臣木业有限公司 Teak board drying treatment process

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102189578A (en) * 2011-03-29 2011-09-21 浙江莫霞实业有限公司 Anti-cracking technology of solid wood
CN102390068A (en) * 2011-11-03 2012-03-28 福建农林大学 Modified bamboo veneer made of nanomaterials and production method thereof
CN202264281U (en) * 2011-07-19 2012-06-06 杭州大王椰控股集团有限公司 Formaldehyde elimination and purifying device for board
CN103496020A (en) * 2013-10-12 2014-01-08 北京林业大学 Antibacterial wood and manufacturing method thereof
CN105887558A (en) * 2016-04-28 2016-08-24 广东皇田环保科技有限公司 Preparation method and application of complex adhesive crystal materials
CN107213868A (en) * 2017-07-06 2017-09-29 江南大学 One kind has formaldehyde absorbing degradation function safe green composite and preparation method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102189578A (en) * 2011-03-29 2011-09-21 浙江莫霞实业有限公司 Anti-cracking technology of solid wood
CN202264281U (en) * 2011-07-19 2012-06-06 杭州大王椰控股集团有限公司 Formaldehyde elimination and purifying device for board
CN102390068A (en) * 2011-11-03 2012-03-28 福建农林大学 Modified bamboo veneer made of nanomaterials and production method thereof
CN103496020A (en) * 2013-10-12 2014-01-08 北京林业大学 Antibacterial wood and manufacturing method thereof
CN105887558A (en) * 2016-04-28 2016-08-24 广东皇田环保科技有限公司 Preparation method and application of complex adhesive crystal materials
CN107213868A (en) * 2017-07-06 2017-09-29 江南大学 One kind has formaldehyde absorbing degradation function safe green composite and preparation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110479307A (en) * 2019-09-24 2019-11-22 浙江农林大学 A kind of efficiently durable wood-based composite material and preparation method except formaldehyde
CN112361742A (en) * 2020-09-16 2021-02-12 广州市佤臣木业有限公司 Teak board drying treatment process
CN112361742B (en) * 2020-09-16 2022-04-22 广州市佤臣木业有限公司 Teak board drying treatment process

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