CN107805398A - Stalk fibrous composite and preparation method thereof - Google Patents
Stalk fibrous composite and preparation method thereof Download PDFInfo
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- CN107805398A CN107805398A CN201711000880.2A CN201711000880A CN107805398A CN 107805398 A CN107805398 A CN 107805398A CN 201711000880 A CN201711000880 A CN 201711000880A CN 107805398 A CN107805398 A CN 107805398A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- 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
- B27K3/34—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
- B27K5/06—Softening or hardening of wood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
- B27L11/06—Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood powder or sawdust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
-
- 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
- B27K2200/00—Wooden materials to be treated
- B27K2200/15—Pretreated particles or fibres
-
- 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
- B27K2240/30—Fireproofing
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Abstract
The invention discloses a kind of stalk fibrous composite and preparation method thereof, the preparation method includes：(1) straw and aqueous slkali are mixed, crushed straw after filtering；(2) straw after crushing, polyacrylate and methanol are mixed, softened afterwards, obtain straw mixture；(3) straw mixture, acid fiber by polylactic, wood-fibred, citric acid, sodium dihydrogen phosphate, phenolic resin, polyvinyl resin, Polyurethane and ethylene glycol are mixed, and stalk fibrous composite is obtained through precompressed, hot pressing and sanding；Solve the problems, such as currently with stalk to be that composite made from raw material also has that mechanical strength is relatively low and fire resistance is poor.
Description
Technical field
The present invention relates to the preparation field of stalk material, in particular it relates to a kind of stalk fibrous composite and its preparation
Method.
Background technology
Rationally, efficiently using agricultural straw resource, turn waste into wealth, production environment friendly materials turn into the world focus
Problem.China is a large agricultural country, and rice, wheat, corn, cotton etc. is main variety of crops.China's crops straw
Stalk annual production arranges No. 1 in the world up to 700,000,000 tons.At present, these agricultural crop straws rich in cellulose mainly have following processing side
Formula, but all Shortcomings：1st, the waste treatment such as landfill, burning, not only without efficent use of resources, and in combustion can
Substantial amounts of carbon dioxide is discharged, pollutes environment；2nd, preparing fuel ethanol, conversion ratio is low, and cost is high；3rd, combustion power generation, added value are low.
Therefore, stalk efficiently also needed to using problem it is widely studied.Using original of the stalk as some composites such as density board
Material, can not only turn waste into wealth, and can efficent use of resources, currently with stalk be composite made from raw material also deposit
Mechanical strength is relatively low and fire resistance is poor the problem of.
Therefore it provides a kind of mechanical strength is higher, while the stalk fibrous composite of superior flame retardant property and its preparation
The problem of method is urgent need to resolve of the present invention.
The content of the invention
It is an object of the invention to provide a kind of stalk fibrous composite and preparation method thereof, solve currently with stalk
The problem of mechanical strength is relatively low and fire resistance is poor also be present for composite made from raw material.
To achieve these goals, the invention provides a kind of preparation method of stalk fibrous composite, the preparation
Method includes：
(1) straw and aqueous slkali are mixed, crushed straw after filtering；
(2) straw after crushing, polyacrylate and methanol are mixed, softened afterwards, obtain plant
Stalk mixture；Wherein, the condition of softening comprises at least：The temperature of softening is 90-100 DEG C, and the time of softening is 10-20min；
(3) by straw mixture, acid fiber by polylactic, wood-fibred, citric acid, sodium dihydrogen phosphate, phenolic resin, poly- second
Olefine resin, Polyurethane and ethylene glycol mixing, and obtain stalk fibrous composite through precompressed, hot pressing and sanding；Wherein, precompressed
Condition comprises at least：The pressure of precompressed is 2.5-3.5MPa, and the temperature of precompressed is 180-200 DEG C；The condition of hot pressing comprises at least：
The pressure of hot pressing is 15-25MPa, and the temperature of hot pressing is 210-250 DEG C.
Present invention also offers a kind of stalk fibrous composite, the stalk fibrous composite is by above-mentioned preparation side
Method is made.
Pass through above-mentioned technical proposal, the invention provides a kind of stalk fibrous composite and preparation method thereof, the system
Preparation Method includes：Straw and aqueous slkali are mixed, crushed straw after filtering；By the plant straw after crushing
Stalk, polyacrylate and methanol are mixed, and are softened afterwards, obtain straw mixture；Wherein, the condition of softening is extremely
Include less：The temperature of softening is 90-100 DEG C, and the time of softening is 10-20min；By straw mixture, acid fiber by polylactic,
Wood-fibred, citric acid, sodium dihydrogen phosphate, phenolic resin, polyvinyl resin, Polyurethane and ethylene glycol mixing, and through precompressed, hot pressing
Stalk fibrous composite is obtained with sanding；Wherein, the condition of precompressed comprises at least：The pressure of precompressed is 2.5-3.5MPa, in advance
The temperature of pressure is 180-200 DEG C；The condition of hot pressing comprises at least：The pressure of hot pressing is 15-25MPa, and the temperature of hot pressing is 210-
250℃.Pass through the synergy between each raw material so that obtained stalk fibrous composite possess excellent mechanical performance and
Fire resistance.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The end points of disclosed scope and any value are not limited to the accurate scope or value herein, these scopes or
Value should be understood to comprising the value close to these scopes or value.For number range, between the endpoint value of each scope, respectively
It can be combined with each other between the endpoint value of individual scope and single point value, and individually between point value and obtain one or more
New number range, these number ranges should be considered as specific open herein.
The invention provides a kind of preparation method of stalk fibrous composite, the preparation method includes：
(1) straw and aqueous slkali are mixed, crushed straw after filtering；
(2) straw after crushing, polyacrylate and methanol are mixed, softened afterwards, obtain plant
Stalk mixture；Wherein, the condition of softening comprises at least：The temperature of softening is 90-100 DEG C, and the time of softening is 10-20min；
(3) by straw mixture, acid fiber by polylactic, wood-fibred, citric acid, sodium dihydrogen phosphate, phenolic resin, poly- second
Olefine resin, Polyurethane and ethylene glycol mixing, and obtain stalk fibrous composite through precompressed, hot pressing and sanding；Wherein, precompressed
Condition comprises at least：The pressure of precompressed is 2.5-3.5MPa, and the temperature of precompressed is 180-200 DEG C；The condition of hot pressing comprises at least：
The pressure of hot pressing is 15-25MPa, and the temperature of hot pressing is 210-250 DEG C.
In a kind of preferred embodiment of the present invention, in order to further improve obtained stalk fibrous composite
Mechanical performance and fire resistance, straw and aqueous slkali are 1 according to mass ratio:10-20 ratio is mixed.
In a kind of preferred embodiment of the present invention, in order to further improve obtained stalk fibrous composite
Mechanical performance and fire resistance, straw are selected from wheat stalk, broomcorn straw, cotton stalk, maize straw and rice straw
In one or more.
In a kind of preferred embodiment of the present invention, in order to further improve obtained stalk fibrous composite
Mechanical performance and fire resistance, the one kind or more of aqueous slkali in sodium hydroxide solution, potassium hydroxide solution and urea liquid
Kind.
In a kind of preferred embodiment of the present invention, in order to further improve obtained stalk fibrous composite
Mechanical performance and fire resistance, in step (3), relative to the straw mixture of 100 parts by weight, the use of acid fiber by polylactic
Measure as 20-30 parts by weight, the dosage of wood-fibred is 10-20 parts by weight, and the dosage of citric acid is 5-15 parts by weight, sodium dihydrogen phosphate
Dosage be 2-8 parts by weight, the dosage of phenolic resin is 15-30 parts by weight, and the dosage of polyvinyl resin is 5-10 parts by weight, gather
The dosage of amine ester is 2-8 parts by weight, and the dosage of ethylene glycol is 50-70 parts by weight.
In a kind of preferred embodiment of the present invention, in order to further improve obtained stalk fibrous composite
Mechanical performance and fire resistance, in step (1), the length of the straw after crushing is 2-5cm.
In a kind of preferred embodiment of the present invention, in order to further improve obtained stalk fibrous composite
Mechanical performance and fire resistance, in step (1), the condition of mixing comprises at least：The temperature of mixing is 30-40 DEG C, mixing
Time is 20-30min.
In a kind of preferred embodiment of the present invention, in order to further improve obtained stalk fibrous composite
Mechanical performance and fire resistance, in step (3), the condition of sanding comprises at least：The time of sanding is 20-30min.
In a kind of preferred embodiment of the present invention, in order to further improve obtained stalk fibrous composite
Mechanical performance and fire resistance, the weight average molecular weight of polyacrylate is 5000-7000, and the weight average molecular weight of phenolic resin is
7000-8000, the weight average molecular weight of polyvinyl resin is 7000-9000, and the weight average molecular weight of Polyurethane is 9000-10000.
Present invention also offers a kind of stalk fibrous composite, the stalk fibrous composite is by above-mentioned preparation side
Method is made.
The present invention will be described in detail by way of examples below.In following examples, polyacrylate is divided equally again
Son amount is 5000-7000, and the weight average molecular weight of phenolic resin is 7000-8000, and the weight average molecular weight of polyvinyl resin is 7000-
9000, the weight average molecular weight of Polyurethane is 9000-10000；With Tensile strength parameter surveyed by GB1040-2006 method
, elongation at break parameter is measured by GB1040-2006 method, the side that fire resistance passes through GB/T2406.2-2009
Method measures.
Embodiment 1
According to mass ratio it is 1 by wheat stalk and sodium hydroxide solution (mass concentration 60%):10 ratio is mixed
(temperature of mixing is 30 DEG C, and the time of mixing is 20min) is closed, is crushed straw after filtering；By the plant after crushing
Thing stalk (length of the straw after crushing is 2cm), polyacrylate and methanol are mixed, and are softened afterwards, obtained
To straw mixture；Wherein, the condition of softening includes：The temperature of softening is 90 DEG C, and the time of softening is 10min；Will
100g straws mixture, 20g acid fiber by polylactic, 10g wood-fibreds, 5g citric acids, 2g sodium dihydrogen phosphates, 15g phenolic resin,
5g polyvinyl resins, 2g Polyurethanes and the mixing of 50g ethylene glycol, and obtained through precompressed, hot pressing and sanding (time of sanding is 20min)
To stalk fibrous composite；Wherein, the condition of precompressed comprises at least：The pressure of precompressed is 2.5MPa, and the temperature of precompressed is 180
℃；The condition of hot pressing comprises at least：The pressure of hot pressing is 15MPa, and the temperature of hot pressing is 210 DEG C.Obtained stalk fibre is compound
The tensile strength of material is 19.3Mpa, elongation at break 275%, oxygen index (OI) 61.
Embodiment 2
According to mass ratio it is 1 by broomcorn straw and potassium hydroxide solution (mass concentration 60%):20 ratio is mixed
(temperature of mixing is 40 DEG C, and the time of mixing is 30min) is closed, is crushed straw after filtering；By the plant after crushing
Thing stalk (length of the straw after crushing is 5cm), polyacrylate and methanol are mixed, and are softened afterwards, obtained
To straw mixture；Wherein, the condition of softening includes：The temperature of softening is 100 DEG C, and the time of softening is 20min；Will
100g straws mixture, 30g acid fiber by polylactic, 20g wood-fibreds, 15g citric acids, 8g sodium dihydrogen phosphates, 30g phenolic aldehyde trees
Fat, 10g polyvinyl resins, 8g Polyurethanes and the mixing of 70g ethylene glycol, and (time of sanding is through precompressed, hot pressing and sanding
30min) obtain stalk fibrous composite；Wherein, the condition of precompressed comprises at least：The pressure of precompressed is 3.5MPa, precompressed
Temperature is 200 DEG C；The condition of hot pressing comprises at least：The pressure of hot pressing is 25MPa, and the temperature of hot pressing is 250 DEG C.Obtained stalk
The tensile strength of fibrous composite is 19.2Mpa, elongation at break 246%, oxygen index (OI) 59.
Embodiment 3
According to mass ratio it is 1 by cotton stalk and urea liquid (mass concentration 60%):15 ratio is mixed (mixed
The temperature of conjunction is 35 DEG C, and the time of mixing is 25min), straw is crushed after filtering；By the straw after crushing
(length of the straw after crushing is 4cm), polyacrylate and methanol are mixed, and are softened afterwards, obtain plant
Stalk mixture；Wherein, the condition of softening includes：The temperature of softening is 95 DEG C, and the time of softening is 15min；By 100g plants
Stalk mixture, 25g acid fiber by polylactic, 15g wood-fibreds, 10g citric acids, 6g sodium dihydrogen phosphates, 20g phenolic resin, the poly- second of 8g
Olefine resin, 6g Polyurethanes and the mixing of 60g ethylene glycol, and obtain stalk through precompressed, hot pressing and sanding (time of sanding is 25min)
Fibrous composite；Wherein, the condition of precompressed comprises at least：The pressure of precompressed is 3MPa, and the temperature of precompressed is 190 DEG C；Hot pressing
Condition comprise at least：The pressure of hot pressing is 20MPa, and the temperature of hot pressing is 220 DEG C.The drawing of obtained stalk fibrous composite
It is 19.1Mpa to stretch intensity, elongation at break 265%, oxygen index (OI) 51.
Comparative example 1
It is prepared by the method according to embodiment 3, unlike, the condition of softening includes：The temperature of softening is 80 DEG C, soft
The time of change is 5min；The tensile strength of obtained stalk fibrous composite is 12.6Mpa, elongation at break 149%, oxygen
Index is 32.
Comparative example 2
It is prepared by the method according to embodiment 3, unlike, the condition of softening includes：The temperature of softening is 110 DEG C,
The time of softening is 25min；The tensile strength of obtained stalk fibrous composite is 11.5Mpa, and elongation at break is
156%, oxygen index (OI) 30.
Comparative example 3
Carried out according to the method for embodiment 3, unlike, the condition of precompressed comprises at least：The pressure of precompressed is 2MPa, in advance
The temperature of pressure is 150 DEG C；The condition of hot pressing comprises at least：The pressure of hot pressing is 10MPa, and the temperature of hot pressing is 200 DEG C；It is obtained
The tensile strength of stalk fibrous composite is 12.2Mpa, elongation at break 136%, oxygen index (OI) 32.
Comparative example 4
Carried out according to the method for embodiment 3, unlike, the condition of precompressed comprises at least：The pressure of precompressed is 4MPa, in advance
The temperature of pressure is 210 DEG C；The condition of hot pressing comprises at least：The pressure of hot pressing is 30MPa, and the temperature of hot pressing is 260 DEG C；It is obtained
The tensile strength of stalk fibrous composite is 11.2Mpa, elongation at break 151%, oxygen index (OI) 31.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited in above-mentioned embodiment
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of preparation method of stalk fibrous composite, it is characterised in that the preparation method includes：
(1) straw and aqueous slkali are mixed, crushed straw after filtering；
(2) straw after crushing, polyacrylate and methanol are mixed, softened afterwards, obtain straw
Mixture；Wherein, the condition of softening comprises at least：The temperature of softening is 90-100 DEG C, and the time of softening is 10-20min；
(3) by straw mixture, acid fiber by polylactic, wood-fibred, citric acid, sodium dihydrogen phosphate, phenolic resin, polyethylene tree
Fat, Polyurethane and ethylene glycol mixing, and obtain stalk fibrous composite through precompressed, hot pressing and sanding；Wherein, the condition of precompressed
Comprise at least：The pressure of precompressed is 2.5-3.5MPa, and the temperature of precompressed is 180-200 DEG C；The condition of hot pressing comprises at least：Hot pressing
Pressure be 15-25MPa, the temperature of hot pressing is 210-250 DEG C.
2. preparation method according to claim 1, wherein, straw and aqueous slkali are 1 according to mass ratio:10-20's
Ratio is mixed.
3. preparation method according to claim 1, wherein, straw is selected from wheat stalk, broomcorn straw, cotton straw
One or more in stalk, maize straw and rice straw.
4. preparation method according to claim 1, wherein, aqueous slkali be selected from sodium hydroxide solution, potassium hydroxide solution and
One or more in urea liquid.
5. preparation method according to claim 1, wherein, in step (3), relative to the straw of 100 parts by weight
Mixture, the dosage of acid fiber by polylactic is 20-30 parts by weight, and the dosage of wood-fibred is 10-20 parts by weight, and the dosage of citric acid is
5-15 parts by weight, the dosage of sodium dihydrogen phosphate are 2-8 parts by weight, and the dosage of phenolic resin is 15-30 parts by weight, polyvinyl resin
Dosage be 5-10 parts by weight, the dosage of Polyurethane is 2-8 parts by weight, and the dosage of ethylene glycol is 50-70 parts by weight.
6. preparation method according to claim 1, wherein, in step (1), the length of the straw after crushing is 2-
5cm。
7. preparation method according to claim 1, wherein, in step (1), the condition of mixing comprises at least：Mixing
Temperature is 30-40 DEG C, and the time of mixing is 20-30min.
8. preparation method according to claim 1, wherein, in step (3), the condition of sanding comprises at least：Sanding
Time is 20-30min.
9. preparation method according to claim 1, wherein, the weight average molecular weight of polyacrylate is 5000-7000, phenolic aldehyde
The weight average molecular weight of resin is 7000-8000, and the weight average molecular weight of polyvinyl resin is 7000-9000, and Polyurethane is divided equally again
Son amount is 9000-10000.
10. a kind of stalk fibrous composite, it is characterised in that the stalk fibrous composite in claim 1-9 by appointing
Preparation method described in meaning one is made.
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Cited By (3)
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| CN108456415A (en) * | 2018-04-16 | 2018-08-28 | 合肥欧克斯新型建材有限公司 | A kind of compound floor tile of insulation antiseptic and preparation method thereof |
| CN108467577A (en) * | 2018-04-08 | 2018-08-31 | 赵建平 | A kind of preparation method of self-reinforcing lactic acid composite material |
| CN110259030A (en) * | 2019-06-04 | 2019-09-20 | 江苏肯帝亚木业有限公司 | A kind of flexible resilient structures macromolecule composite floor of stalk fibre and preparation method thereof |
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| CN106084696A (en) * | 2016-07-21 | 2016-11-09 | 芜湖凯奥尔环保科技有限公司 | A kind of environmental-protection flame-retardant 3D printed material and preparation method thereof |
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| CN107160530A (en) * | 2017-07-15 | 2017-09-15 | 芜湖乾凯材料科技有限公司 | High strength fiberboard and preparation method thereof |
| CN107163499A (en) * | 2017-07-15 | 2017-09-15 | 芜湖乾凯材料科技有限公司 | High strength fibre reinforced plastics wall hanging board and preparation method thereof |
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| CN108467577A (en) * | 2018-04-08 | 2018-08-31 | 赵建平 | A kind of preparation method of self-reinforcing lactic acid composite material |
| CN108456415A (en) * | 2018-04-16 | 2018-08-28 | 合肥欧克斯新型建材有限公司 | A kind of compound floor tile of insulation antiseptic and preparation method thereof |
| CN110259030A (en) * | 2019-06-04 | 2019-09-20 | 江苏肯帝亚木业有限公司 | A kind of flexible resilient structures macromolecule composite floor of stalk fibre and preparation method thereof |
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