CN103358385A - Method for producing non-formaldehyde environment-friendly particle boards by utilizing alkali lignin as binder - Google Patents
Method for producing non-formaldehyde environment-friendly particle boards by utilizing alkali lignin as binder Download PDFInfo
- Publication number
- CN103358385A CN103358385A CN2012100960647A CN201210096064A CN103358385A CN 103358385 A CN103358385 A CN 103358385A CN 2012100960647 A CN2012100960647 A CN 2012100960647A CN 201210096064 A CN201210096064 A CN 201210096064A CN 103358385 A CN103358385 A CN 103358385A
- Authority
- CN
- China
- Prior art keywords
- alkali lignin
- particieboard
- adhesive
- wood shavings
- lignin
- Prior art date
- 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.)
- Granted
Links
Landscapes
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention belongs to the field of boards or packing materials, and particularly relates to a method for producing non-formaldehyde environment-friendly particle boards by means of hot press molding with stalks as raw materials and alkali lignin as a binder. The method for producing the particle boards includes steps of producing wood shavings by lignocellulose materials and activating with alkali added; adding alkali lignin solution, mixing uniformly with a certain water content maintained, and prepressing to produce sheets with certain thickness; applying the alkali lignin solution onto surfaces of the sheets secondarily by a spraying process, overlapping the sheets layer by layer, and finally performing hot pressing molding. The binding effect of the alkali lignin at high temperature is utilized to substitute for the conventional binders to assist in hot press molding of the lingocellulose materials, so that the problem of formaldehyde gas pollution caused by use of the conventional binders is solved completely. Since the alkali lignin is low-cost in use, production cost of hot press molding of the boards is reduced and economical benefit of the particle boards is increased.
Description
Technical field
The invention belongs to the particieboard preparation field, particularly take lignocellulosic as raw material, take alkali lignin as adhesive by hot-forming preparation high strength without aldehyde particieboard method.
Background technology
Particieboard mainly is to utilize timber or other ligno-cellulosic materials to be raw material, is processed into the wood shavings particle, adds a certain amount of adhesive, the artificial board that compacting forms under certain temperature and pressure.Particieboard can take full advantage of the raw materials such as agricultural crop straw or wood machining residues, our country for inadequate forest resources, the development particieboard is even more important, and has just proposed to utilize respectively the method for reed, reed grass and agricultural crop straw hot pressing particieboard such as patent CN1103348, CN101244580, CN1412092.Yet use at present more Lauxite and the phenolic resins etc. of being still from macromolecule resin that non-renewable petroleum resources synthesized at the adhesive that the particieboard manufacture process is added, along with rising steadily of petroleum resources price, the cost that particieboard is made is also constantly soaring, searching utilizes renewable resource petroleum replacing product as the raw material of preparation adhesive, has become the important development direction that particieboard is made.There is the problem that discharges free formaldehyde in adhesive made of synthetic resin simultaneously, pollutes indoor environment, is detrimental to health.Along with the rising that country is realized further requirement and the health of people of free formaldehyde release standard, burst size of methanal exceeds standard in the synthetic adhesive also becomes a bottleneck problem of restriction particieboard development.
In order to solve the problem that above-mentioned particieboard adhesive exists and to be the searching space for sustainable development of particieboard industry, psychology according to modern's back to nature, utilize the preparation particieboard of natural adhesive to become main research direction, a kind of synthetic method of soybean albumen adhesive has been proposed such as patent CN101469257, patent CN101760148A has proposed to utilize cornstarch as the method for adhesive, and patent CN101402833 has reported the method for utilizing shitosan and aldehydes matter normal temperature under the catalysis of laccase to prepare wood-based plate.But the manufacturing cost of material of above-mentioned natural adhesive is higher, intensity is lower, water resistance is relatively poor, be easier to wear out and be subject to microbial contamination, it is not obvious that the particieboard that causes natural adhesive preparation and traditional particieboard are compared advantage, and this also is the natural adhesive fast-developing major reason that delays in the particieboard field.
Lignin is one of three large constituents of ligno-cellulosic materials, its Main Function in plant is exactly to be plant intensity and degeneration-resistant, lignin is by the hydrophobic high polymer of phenylpropyl alcohol alkane monomer structure by ehter bond or C―C bond formation simultaneously, therefore preferably waterproof action is arranged, utilize lignin can solve preferably as adhesive and utilize that protein or polysaccharose substance are low as the intensity that adhesive brings, water resistance is poor and be subject to the shortcoming such as microbial contamination.Alkali lignin is the important by-products of soda pulping process, mainly exists in the papermaking wastewater, by the acid out precipitation, just can isolate the higher alkali lignin of purity, and its cost is low than other natural glues.Patent CN101492522, CN10135812 and CN101942068A have proposed the preparation method of alkali lignin modified phenolic resin, but in these patents, alkali lignin can only partly substitute phenol and formaldehyde condensation, therefore also there is the formaldehyde release And Spread of Solute simultaneously in this adhesive major part from the petrochemical industry resource.Patent CN102248572A has proposed directly to utilize black liquid to prepare the method for particieboard as adhesive, but because papermaking wastewater complicated component, except lignin, also have a large amount of hemicellulose degradation products, cause easily the pressing plate effect to exist unstable and microbiological contamination.The alkali lignin that acid out is separated from black liquid, sugar content and content of ashes are all lower, activity group content is high, can play dehydration condensation with active group and the lignin itself in the ligno-cellulosic materials of overactivation under high temperature action, forms similar adhesive action effect.The present invention directly utilizes the alternative traditional adhesive of alkali lignin adhesive action at high temperature that ligno-cellulosic materials is carried out heating platen, thoroughly solved the formaldehyde gas pollution problem of traditional adhesive, the simultaneously use of relatively inexpensive alkali lignin has reduced the production cost of pressing plate, has improved the economic benefit of particieboard.
Summary of the invention
Main purpose of the present invention is to utilize the lignocellulosic shavings raw material of alkaline process activation, sets up take alkali lignin as adhesive, by the method for certain temperature and pressure hot pressing particieboard.This particieboard preparation method is by alkaline process activation wood particle raw material, utilize alkali lignin at high temperature with raw material in the adhesive action that forms of lignin and carbohydrate generation condensation reaction substituted the adhesive action of traditional Lauxite or phenolic resins, the formaldehyde gas that has thoroughly solved traditional adhesive discharges pollution problem, use simultaneously relatively inexpensive alkali lignin to reduce the production cost of pressing plate, improved the economic benefit of particieboard preparation.
Key step of the present invention is as follows:
(1) manufacturing of lignocellulosic material wood shavings, particle:
The raw material of wood shavings can be wood machining residues, agricultural crop straw etc., grows into 5-20mm by shaving machine or pulverizer preparation, and wide is that 3-10mm, thickness are the particle of 2-5mm.
(2) the wood shavings material that step (1) is obtained adds 1-2%NaOH solution boiling activation with quality solid-to-liquid ratio 1: 8-10, and temperature is 80～100 ℃, and the time is 25～30min, squeezes out aqueous slkali after boiling is finished, material drying.
(3) the wood shavings material that step (2) is obtained evenly sprays the alkali lignin concentrated solution that concentration is 5-10%, and quantity for spray is 1: 0.5-1, the addition of alkali lignin are 5-10%, and the control water content is 30-50%.
(4) the wood shavings material prefabricating plate that step (3) is obtained, pressure 0.1-0.2MPa, temperature is controlled at 90-110 ℃, and the time is 5min, is pressed in advance the thin plate of thickness 8-10mm.
(5) secondary applies alkali lignin solution in the wood shavings thin plate top layer that step (4) precompressed obtains, quantity for spray is 0.5-1.5%, the control water content is 20-30%, the multi-layered sheet intersection is stacked, prepare particieboard by hot-press method, hot pressing temperature is 170-185 ℃, and the time is 8-10min, and pressure is 0.8-1.2MPa.
The advantage that the present invention has: alkali lignin is the main component of waste liquor in alkaline process paper making, and wide material sources for adhesive made of synthetic resin, are that belong to can be in the production-goods source, and relative low price does not contain the formaldehyde release And Spread of Solute simultaneously.Therefore by alkali lignin as the production of adhesive particieboard, turn waste into wealth, have preferably economic worth and environment protection significance.
The specific embodiment
Embodiment 1: with corn straw smashing, collect crushed material by pulverizer, add 1%NaOH solution at 1: 10 in 80 ℃ of boiling 30min with the quality solid-to-liquid ratio, squeeze out aqueous slkali, collect the rear wood shavings material oven dry of alkali activation.Next add 5% alkali lignin solution in the wood shavings material, mix all with, solid-to-liquid ratio is 1: 1, material moisture is about 75% at this moment, dry to the water content of material be 35%.
Shavings raw material after the oven dry is mated formation and carried out precompressed at hot press, and the purpose of precompressed is to eliminate internal stress and reduce water content, and lignin is fully contacted with shavings raw material.The pressure of precompressed is 0.2MPa, and temperature is 90 ℃, and the time is 5min, is pressed in advance the thin plate that thickness is 8mm.Can improve by the secondary applying glue intensity of particieboard before the pressing plate.Thin plate top layer after precompressed evenly sprays 5% alkali lignin solution again, and the control water content is 25%, multi-layered sheet is intersected stack, and prepares particieboard by hot-press method, and hot pressing temperature is 185 ℃, and the time is 8min, and pressure is 1.0MPa.
Embodiment 2: with corn straw smashing, collect crushed material by pulverizer, add 2%NaOH solution at 1: 8 in 100 ℃ of boiling 25min with the quality solid-to-liquid ratio, squeeze out aqueous slkali, collect the rear wood shavings material oven dry of alkali activation.Next add 10% alkali lignin solution in the wood shavings material, mix all with, solid-to-liquid ratio is 1: 1, dry to the water content of material be 40%.
Shavings raw material after the oven dry is mated formation and carried out precompressed at hot press, and the purpose of precompressed is to eliminate internal stress and reduce water content, and lignin is fully contacted with shavings raw material.The pressure of precompressed is 0.1MPa, and temperature is 110 ℃, and the time is 5min, is pressed in advance the thin plate that thickness is 10mm.Can improve by the secondary applying glue intensity of particieboard before the pressing plate.Thin plate top layer after precompressed evenly sprays 5% alkali lignin solution again, and the control water content is 20%, multi-layered sheet is intersected stack, and prepares particieboard by hot-press method, and hot pressing temperature is 180 ℃, and the time is 10min, and pressure is 1.2MPa.
Embodiment 3: by pulverizer straw is pulverized, collected crushed material, add 2%NaOH solution at 1: 8 in 90 ℃ of boiling 25min with the quality solid-to-liquid ratio, squeeze out aqueous slkali, collect the rear wood shavings material of alkali activation.Next add 5% alkali lignin solution in the wood shavings material, mix all with, solid-to-liquid ratio is 1: 1, material moisture is about 80% at this moment, dry to the water content of material be 30%.
Shavings raw material after the oven dry is mated formation and carried out precompressed at hot press, and the purpose of precompressed is to eliminate internal stress and reduce water content, and lignin is fully contacted with shavings raw material.The pressure of precompressed is 0.1MPa, and temperature is 110 ℃, and the time is 5min, is pressed in advance the thin plate that thickness is 5mm.Can improve by the secondary applying glue intensity of particieboard before the pressing plate.Thin plate top layer after precompressed evenly sprays 5% alkali lignin solution again, and the control water content is 30%, multi-layered sheet is intersected stack, and prepares particieboard by hot-press method, and hot pressing temperature is 170 ℃, and the time is 10min, and pressure is 1.2MPa.
Embodiment 4: take the medium density fibre board (MDF) industrial wood waste as raw material, add 10% alkali lignin solution, evenly mix, solid-to-liquid ratio is 1: 0.8, and this moment, material moisture was about 40%.To mat formation with the mixed uniformly shavings raw material of lignin and carry out hot pressing at hot press, be 90 ℃ in temperature, when pressure is 0.2MPa, again increases the temperature to 175 ℃ after keeping 5min, improves pressure to 0.8MPa after temperature arrives, and keeps 8min.
Claims (5)
- One kind take alkali lignin as adhesive without aldehyde environmental protection particieboard preparation method, described method comprises the following steps:The manufacturing of a lignocellulosic material wood shavings, particle:The raw material of wood shavings can be wood machining residues, agricultural crop straw etc., grows into 5-20mm by shaving machine or pulverizer preparation, and wide is that 3-10mm, thickness are the particle of 2-5mm.B adds 1-2%NaOH solution boiling activation with the wood shavings material that step a obtains with quality solid-to-liquid ratio 1: 8-10, and temperature is 80～100 ℃, and the time is 25～30min, squeezes out aqueous slkali after boiling is finished, material drying.The wood shavings material that c obtains step b evenly sprays the alkali lignin concentrated solution that concentration is 5-10%, and quantity for spray is 1: 0.5-1, the addition of alkali lignin are 4-6%, and the control water content is 30-50%.The wood shavings material prefabricating plate that d obtains step c, pressure 0.1-0.2MPa, temperature is controlled at 90-110 ℃, and the time is 5min, is pressed in advance the thin plate of thickness 5-10mm.The e secondary applies alkali lignin solution in the wood shavings thin plate top layer that the steps d precompressed obtains, quantity for spray is 0.5-1.5%, the control water content is 20-30%, the multi-layered sheet intersection is stacked, prepare particieboard by hot-press method, hot pressing temperature is 170-185 ℃, and the time is 8-10min, and pressure is 0.8-1.2MPa.
- By claimed in claim 1 a kind of take alkali lignin as adhesive without aldehyde environmental protection particieboard preparation method, it is characterized in that: the raw material of particieboard is wood machining residues or agricultural crop straw.
- By claimed in claim 1 a kind of take alkali lignin as adhesive without aldehyde environmental protection particieboard preparation method, it is characterized in that: alkali lignin is by black liquid acid out precipitation, water washing and precipitating, spray-drying forms; Alkali lignin solution is dissolved in 1% 1 3%NaOH solution by alkali lignin and makes.
- By claimed in claim 1 a kind of take alkali lignin as adhesive without aldehyde environmental protection particieboard preparation method, it is characterized in that: calculate with the alkali lignin amount, the alkali lignin addition is 4-6%; According to spraying lignin liquor amount control water content.
- By claimed in claim 1 a kind of take alkali lignin as adhesive without aldehyde environmental protection particieboard preparation method, it is characterized in that: the wood shavings thin plate that precompressed forms is by secondary applying glue hot pressing particieboard; Hot pressing temperature is 170-185 ℃, and the time is 8-10min, and pressure is 0.8-1.2MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210096064.7A CN103358385B (en) | 2012-04-01 | 2012-04-01 | Method for producing non-formaldehyde environment-friendly particle boards by utilizing alkali lignin as binder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210096064.7A CN103358385B (en) | 2012-04-01 | 2012-04-01 | Method for producing non-formaldehyde environment-friendly particle boards by utilizing alkali lignin as binder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103358385A true CN103358385A (en) | 2013-10-23 |
| CN103358385B CN103358385B (en) | 2015-07-01 |
Family
ID=49361072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210096064.7A Expired - Fee Related CN103358385B (en) | 2012-04-01 | 2012-04-01 | Method for producing non-formaldehyde environment-friendly particle boards by utilizing alkali lignin as binder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103358385B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105235046A (en) * | 2015-09-21 | 2016-01-13 | 昆明理工大学 | Dry method for manufacturing fiber board through cow dung |
| WO2020258682A1 (en) * | 2019-06-28 | 2020-12-30 | 北京林业大学 | Formaldehyde-free medium and high-density board supporting deep overcoating and manufacturing method thereof |
| CN112720769A (en) * | 2020-12-25 | 2021-04-30 | 浙江农林大学 | Preparation method of environment-friendly high-strength wood fiber-based composite material |
| CN114016323A (en) * | 2021-09-27 | 2022-02-08 | 武汉轻工大学 | Preparation method and application of biodegradable cellulose paper with lignin as adhesive |
| CN115635555A (en) * | 2022-10-31 | 2023-01-24 | 中南林业科技大学 | Preparation method of environment-friendly high-strength wood composite material |
| CN115781858A (en) * | 2023-02-08 | 2023-03-14 | 中国林业科学研究院林产化学工业研究所 | E NF Preparation method of graded lignin-based shaving board |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618565A (en) * | 2009-04-28 | 2010-01-06 | 王勇 | Manufacture method of environment-friendly wood substrate composite material |
| CN102179856A (en) * | 2011-04-07 | 2011-09-14 | 云南工业大麻股份有限公司 | High-intensity shaving board and manufacturing method thereof |
| CN102248572A (en) * | 2011-07-19 | 2011-11-23 | 中南林业科技大学 | Method for manufacturing high-strength environmentally-friendly binderless particle board |
-
2012
- 2012-04-01 CN CN201210096064.7A patent/CN103358385B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618565A (en) * | 2009-04-28 | 2010-01-06 | 王勇 | Manufacture method of environment-friendly wood substrate composite material |
| CN102179856A (en) * | 2011-04-07 | 2011-09-14 | 云南工业大麻股份有限公司 | High-intensity shaving board and manufacturing method thereof |
| CN102248572A (en) * | 2011-07-19 | 2011-11-23 | 中南林业科技大学 | Method for manufacturing high-strength environmentally-friendly binderless particle board |
Non-Patent Citations (3)
| Title |
|---|
| 淡勇: "造纸黑液中碱木质素的析出探讨", 《西北大学学报》 * |
| 赵庆韬: "碱木素粘合剂的研制", 《吉林化工学院学报》 * |
| 郑紫崖: "利用碱木素生产热压人造板材", 《建筑材料工业》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105235046A (en) * | 2015-09-21 | 2016-01-13 | 昆明理工大学 | Dry method for manufacturing fiber board through cow dung |
| WO2020258682A1 (en) * | 2019-06-28 | 2020-12-30 | 北京林业大学 | Formaldehyde-free medium and high-density board supporting deep overcoating and manufacturing method thereof |
| CN112720769A (en) * | 2020-12-25 | 2021-04-30 | 浙江农林大学 | Preparation method of environment-friendly high-strength wood fiber-based composite material |
| CN114016323A (en) * | 2021-09-27 | 2022-02-08 | 武汉轻工大学 | Preparation method and application of biodegradable cellulose paper with lignin as adhesive |
| CN115635555A (en) * | 2022-10-31 | 2023-01-24 | 中南林业科技大学 | Preparation method of environment-friendly high-strength wood composite material |
| CN115781858A (en) * | 2023-02-08 | 2023-03-14 | 中国林业科学研究院林产化学工业研究所 | E NF Preparation method of graded lignin-based shaving board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103358385B (en) | 2015-07-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103358385B (en) | Method for producing non-formaldehyde environment-friendly particle boards by utilizing alkali lignin as binder | |
| Ghaffar et al. | Lignin in straw and its applications as an adhesive | |
| CN101086150B (en) | Gluing-free middle and high-density fiber board preparation method | |
| CN103358381B (en) | The preparation method of a kind of alkaline process steam puffed stalk glue-free artificial board | |
| CN101659074B (en) | Method for manufacturing weed wood and straw compounding medium density fiberboard with laminated structure | |
| CN102634308B (en) | Preparation method of biomass-based phenolic resin wood adhesive | |
| CN102225571A (en) | Method for producing glue-free fiber board by using dry method of steam explosion slurry | |
| CN103358377B (en) | The preparation method of the glue-free environment friendly artificial board of a kind of steam puffed stalk | |
| CN102642222B (en) | Method for preparing aldehyde-free veneer boards by biological oil starch adhesives | |
| EP0961813B1 (en) | Adhesive composition and its use | |
| CN105082302A (en) | Manufacturing method of high-strength chipboard | |
| CN105349093A (en) | Soybean meal-based adhesive for fiber boards and synthetic method | |
| CN1094090C (en) | Board produced with use of grass plant lignin and process for producing the same | |
| US20220333308A1 (en) | Process for producing binderless formaldehyde-free fiberboard and coproducing fulvic acid from straw | |
| CN105128120A (en) | High-density composite fiberboard based on surface processed hybrid fiber and preparation method of high-density composite fiberboard | |
| CN103362008A (en) | Method for producing steam-exploded stalk eco-boards by utilizing alkali lignin as binder | |
| CN101328396A (en) | Eastern larch bark rapid pyrolysis oil modified phenolic resin adhesive | |
| CN104369251A (en) | Manufacturing method cotton straw composite artificial board | |
| WO1998037147A2 (en) | Adhesive composition and its use | |
| He et al. | Utilization of citric acid in wood bonding | |
| CN103465339B (en) | A kind of production method of formaldehydeless environment protecting fiber board | |
| CN101786286B (en) | Manufacturing method for modified enzymolysis lignin composite board | |
| CN107571368A (en) | Utilize the method for whiterot fungi straw degradative liquid production non-glue fibre board | |
| CN114369435A (en) | Preparation method of biomass-based adhesive and adhesive | |
| CN102758384A (en) | Fabricating method of formaldehyde-free wheat straw medium density fiberboard |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20170401 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |