CN110202663B - Environment-friendly sustainable circulating biomass composite fiber material - Google Patents

Environment-friendly sustainable circulating biomass composite fiber material Download PDF

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CN110202663B
CN110202663B CN201910482304.9A CN201910482304A CN110202663B CN 110202663 B CN110202663 B CN 110202663B CN 201910482304 A CN201910482304 A CN 201910482304A CN 110202663 B CN110202663 B CN 110202663B
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hot pressing
fiber material
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CN110202663A (en
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不公告发明人
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ZHEJIANG KANO-CN OFFICE FURNITURE Co.,Ltd.
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Zhejiang Kano Cn Office Furniture Co ltd
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    • 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
    • B27K3/12—Impregnating by coating the surface of the wood with an impregnating paste
    • 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
    • B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
    • 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
    • B27N3/002—Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
    • 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
    • B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
    • 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
    • B27N3/10—Moulding of mats
    • B27N3/12—Moulding of mats from fibres
    • 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
    • B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)

Abstract

The invention relates to an environment-friendly sustainable circulation type biomass composite fiber material, which is prepared by the following method: (1) core plate hot-pressing preparation, (2) multilayer plate hot-pressing preparation, and (3) cold-pressing treatment. The invention carries out targeted improvement treatment on the biomass composite fiber material, effectively enhances the bonding capability between interfaces, simultaneously ensures good appearance characteristics, and finally prepares the composite fiber material with good mechanical property and high comprehensive use and popularization value.

Description

Environment-friendly sustainable circulating biomass composite fiber material
Technical Field
The invention relates to an environment-friendly sustainable circulation type biomass composite fiber material.
Background
China is the biggest chemical fiber producing country in the world, but the production of chemical fibers is increasingly limited due to the shortage of energy. Because the raw material for producing chemical fibers is mainly petroleum, alternative materials or energy sources must be found in order to alleviate the energy crisis. The biomass fiber as a renewable resource for meeting the increasing demand of people is a good choice. Although the composite fiber material reinforced by the glass fiber has better tensile and compressive properties than the composite fiber material reinforced by the biomass fiber, the composite fiber material reinforced by the biomass fiber has better strength-to-weight ratio. It has also been shown that the addition of materials of vegetable fibre structure generally improves the mechanical properties of the matrix and that the fibres provide a good retardation effect when the material breaks. The biomass fiber reinforced composite fiber material has the advantages that the glass fiber cannot match. Firstly, the raw material source of the biomass fiber is very wide, the regeneration capacity is strong, and the biomass fiber is an inexhaustible biological resource; secondly, the composite fiber material prepared by the biomass fiber does not cause any harm to human bodies in the production process, and because the biomass fiber is an environment-friendly material and has good affinity with human beings, people are willing to accept the biomass fiber reinforced composite fiber material product, thereby providing huge market space for the development of the biomass fiber composite fiber material. At present, plant fibers are widely applied to biomass fiber reinforced composite fiber materials, and the main chemical component of the plant fibers is cellulose, so the plant fibers are also called as cellulose fibers. Plant fibers are of various types and can be classified into stem fibers, seed fibers and bast fibers according to their origin. The stalk fiber includes wood fiber, bamboo fiber, grass stalk fiber, etc., the seed fiber includes cotton fiber, etc., the leaf fiber includes sisal fiber, etc., and the bast fiber includes flax fiber, jute fiber, hemp fiber, etc. Wherein the tensile strength of the sisal fibers and the bamboo fibers is higher than that of other natural fibers. If classified according to the form of the fiber, the fiber can be classified into long fiber, short fiber, fiber particles and the like.
A biomass composite board (CN 107351473A) is independently developed by the limited scientific and technological development of the authentic agriculture in Anhui province, and the processing technology of the biomass composite board comprises the following steps: (1) core plate hot-pressing preparation, (2) multilayer plate hot-pressing preparation, and (3) cold-pressing treatment. The processing treatment process of the biomass composite board is pertinently improved, the bonding capability between interfaces is effectively enhanced, good appearance characteristics are guaranteed, and the finally prepared composite board is good in mechanical property and improved in characteristics compared with a composite board formed by one-time hot pressing.
However, after the composite board is applied to the market, the bending strength and the impact strength of the composite board are still low (the bending strength is only 28.46MPa, and the impact strength is only 7.23 kJ/m)2) And the requirement of high-end plates cannot be completely met.
Disclosure of Invention
The invention overcomes the technical problems that the bending strength and the impact strength of the biomass composite fiber material in the prior art are still low and the requirement of a high-end plate cannot be completely met.
The invention provides the following technical scheme:
an environment-friendly sustainable circulation type biomass composite fiber material is prepared by the following method:
(1) hot-pressing preparation of the core plate: uniformly mixing biomass fibers, a coupling agent N and thermoplastic powder, paving the mixture into a core layer plate blank with the thickness of 3-4 mm, placing the core layer plate blank into a hot press for hot pressing treatment, wherein the hot pressing temperature is controlled to be 185-195 ℃, the hot pressing pressure is controlled to be 1.5-2.5 MPa, and the core plate is obtained for later use after the hot pressing treatment is carried out for 3-5 min;
(2) hot-pressing preparation of the multilayer board: uniformly mixing biomass fibers, a coupling agent N and thermoplastic powder, paving the mixture into surface layer materials with the thickness of 2-3 mm, paving the surface layer materials on the upper surface and the lower surface of the core plate obtained in the step (1), before the paving treatment, spraying a modifying solution on the upper surface and the lower surface of the core plate, putting the mixture which is formed by taking the core plate as a central layer and taking the surface layer materials as an upper layer and a lower layer into a hot press for hot pressing treatment, wherein the hot pressing temperature is controlled to be 185-195 ℃, the hot pressing pressure is controlled to be 1.5-2.5 MPa, and the hot pressing treatment is carried out for 3-5 min to obtain a multi-layer plate for later use; the modifying solution comprises the following components in percentage by weight: 3% of zinc borate, 2% of modifier M, 0.2% of phosphatidylethanolamine and the balance of water;
the structural formula of the modifier M is as follows:
Figure BDA0002084246040000021
(3) cold pressing treatment:
and (3) putting the multilayer board obtained in the step (2) into a cold press, controlling the pressure during cold pressing treatment to be 1.0-2.0 MPa, and taking out the multilayer board when the temperature of the multilayer board is not more than 50 ℃ and naturally cooling the multilayer board to room temperature to obtain the environment-friendly sustainable circulation type biomass composite fiber material.
Wherein the mass ratio of the biomass fibers, the coupling agent N and the thermoplastic powder in the step (1) is 1: 0.05: 0.5.
wherein the biomass fiber is any one of rice straw, wheat straw and bamboo fiber.
Wherein, the chemical structural formula of the coupling agent N is as follows:
Figure BDA0002084246040000031
wherein the thermoplastic plastic is any one of polyethylene, polypropylene and polyvinyl chloride.
Wherein the corresponding spraying amount of the modified liquid on the plate is 40-50 ml/m2。
Compared with the prior art, the invention has the beneficial effects that:
(1) compared with the prior art which adopts tartaric acid, the modification effect is more obvious and enhanced by adopting the modifier M to replace tartaric acid, the content and activity of the surface groups of the reinforced fibers are greatly improved, the crosslinking fusion is facilitated, the fiber refining and fuzzing degree of the surface of the core plate are improved, the contact area and the affinity among the fibers are further facilitated, the quality of the composite fiber material is finally improved, and the technical problem that the bending strength and the impact strength of the biomass composite fiber material in the prior art are still lower is completely solved.
(2) The invention also adopts the coupling agent N to replace the common silane coupling agent kh550, silane coupling agent kh560 and silane coupling agent kh570, compared with the silane coupling agent kh550, silane coupling agent kh560 and silane coupling agent kh570, the coupling effect of the coupling agent N is more obvious, the bending strength and the impact strength of the composite fiber material can be improved to a certain extent, and the comprehensive performance of the material is further optimized.
Detailed Description
The following detailed description further describes the invention in detail.
Example 1
An environment-friendly sustainable circulation type biomass composite fiber material is prepared by the following method:
(1) hot-pressing preparation of the core plate: uniformly mixing biomass fibers, a coupling agent N and thermoplastic powder, paving the mixture into a core layer plate blank with the thickness of 3-4 mm, putting the core layer plate blank into a hot press for hot pressing, wherein the hot pressing temperature is controlled to be 185 ℃, the hot pressing pressure is controlled to be 1.5MPa, and the core plate is obtained for later use after the hot pressing treatment is carried out for 3 min;
(2) hot-pressing preparation of the multilayer board: uniformly mixing biomass fibers, a coupling agent N and thermoplastic powder, paving the mixture into surface layer materials with the thickness of 2-3 mm, paving the surface layer materials on the upper surface and the lower surface of the core plate obtained in the step (1), before the paving treatment, spraying a modifying liquid on the upper surface and the lower surface of the core plate, putting the mixture which is formed by taking the core plate as a central layer and taking the surface layer materials as an upper layer and a lower layer into a hot press for hot pressing treatment, wherein the hot pressing temperature is controlled to be 185 ℃, the hot pressing pressure is controlled to be 1.5MPa, and the laminated plate is prepared for later use after the hot pressing treatment is carried out for 3 min; the modifying solution comprises the following components in percentage by weight: 3% of zinc borate, 2% of modifier M, 0.2% of phosphatidylethanolamine and the balance of water;
the structural formula of the modifier M is as follows:
Figure BDA0002084246040000041
(3) cold pressing treatment:
and (3) putting the multilayer board obtained in the step (2) into a cold press, controlling the pressure during cold pressing treatment to be 1.0MPa, and taking out the multilayer board when the temperature of the multilayer board is not more than 50 ℃ and naturally cooling the multilayer board to room temperature to obtain the environment-friendly sustainable circulation type biomass composite fiber material.
Wherein the mass ratio of the biomass fibers, the coupling agent N and the thermoplastic powder in the step (1) is 1: 0.05: 0.5.
wherein, the biomass fiber is rice straw.
Wherein, the chemical structural formula of the coupling agent N is as follows:
Figure BDA0002084246040000042
wherein the thermoplastic is polyethylene.
Wherein the corresponding spraying amount of the modifying liquid on the plate is 40ml/m2。
Example 2
An environment-friendly sustainable circulation type biomass composite fiber material is prepared by the following method:
(1) hot-pressing preparation of the core plate: uniformly mixing biomass fibers, a coupling agent N and thermoplastic powder, paving the mixture into a core layer plate blank with the thickness of 3-4 mm, putting the core layer plate blank into a hot press for hot pressing, wherein the hot pressing temperature is controlled to be 190 ℃, the hot pressing pressure is controlled to be 2MPa, and the core plate is obtained for later use after the hot pressing treatment is carried out for 4 min;
(2) hot-pressing preparation of the multilayer board: uniformly mixing biomass fibers, a coupling agent N and thermoplastic powder, paving the mixture into surface layer materials with the thickness of 2-3 mm, paving the surface layer materials on the upper surface and the lower surface of the core plate obtained in the step (1), before the paving treatment, spraying a modifying liquid on the upper surface and the lower surface of the core plate, putting the mixture which is formed by taking the core plate as a central layer and taking the surface layer materials as an upper layer and a lower layer into a hot press for hot pressing treatment, wherein the hot pressing temperature is controlled to be 190 ℃, the hot pressing pressure is controlled to be 2MPa, and the hot pressing treatment is carried out for 4min to obtain a plurality of layer plates for later use; the modifying solution comprises the following components in percentage by weight: 3% of zinc borate, 2% of modifier M, 0.2% of phosphatidylethanolamine and the balance of water;
the structural formula of the modifier M is as follows:
Figure BDA0002084246040000051
(3) cold pressing treatment:
and (3) putting the multilayer board obtained in the step (2) into a cold press, controlling the pressure during cold pressing treatment to be 1.5MPa, and taking out the multilayer board when the temperature of the multilayer board is not more than 50 ℃ and naturally cooling the multilayer board to room temperature to obtain the environment-friendly sustainable circulation type biomass composite fiber material.
Wherein the mass ratio of the biomass fibers, the coupling agent N and the thermoplastic powder in the step (1) is 1: 0.05: 0.5.
wherein, the biomass fiber is wheat straw.
Wherein, the chemical structural formula of the coupling agent N is as follows:
Figure BDA0002084246040000052
wherein the thermoplastic plastic is any one of polypropylene.
Wherein the corresponding spraying amount of the modifying liquid on the plate is 45ml/m2。
Example 3
An environment-friendly sustainable circulation type biomass composite fiber material is prepared by the following method:
(1) hot-pressing preparation of the core plate: uniformly mixing biomass fibers, a coupling agent N and thermoplastic powder, paving the mixture into a core layer plate blank with the thickness of 3-4 mm, putting the core layer plate blank into a hot press for hot pressing, wherein the hot pressing temperature is controlled to be 195 ℃, the hot pressing pressure is controlled to be 2.5MPa, and the core plate is obtained for later use after the hot pressing is carried out for 5 min;
(2) hot-pressing preparation of the multilayer board: uniformly mixing biomass fibers, a coupling agent N and thermoplastic powder, paving the mixture into surface layer materials with the thickness of 2-3 mm, paving the surface layer materials on the upper surface and the lower surface of the core plate obtained in the step (1), before the paving treatment, spraying a modifying liquid on the upper surface and the lower surface of the core plate, putting the mixture which is formed by taking the core plate as a central layer and taking the surface layer materials as an upper layer and a lower layer into a hot press for hot pressing treatment, wherein the hot pressing temperature is controlled to be 195 ℃, the hot pressing pressure is controlled to be 2.5MPa, and the laminated plate is prepared for later use after 5min of hot pressing treatment; the modifying solution comprises the following components in percentage by weight: 3% of zinc borate, 2% of modifier M, 0.2% of phosphatidylethanolamine and the balance of water;
the structural formula of the modifier M is as follows:
Figure BDA0002084246040000061
(3) cold pressing treatment:
and (3) putting the multilayer board obtained in the step (2) into a cold press, controlling the pressure during cold pressing treatment to be 2.0MPa, and taking out the multilayer board when the temperature of the multilayer board is not more than 50 ℃ and naturally cooling the multilayer board to room temperature to obtain the environment-friendly sustainable circulation type biomass composite fiber material.
Wherein the mass ratio of the biomass fibers, the coupling agent N and the thermoplastic powder in the step (1) is 1: 0.05: 0.5.
wherein, the biomass fiber is bamboo fiber.
Wherein, the chemical structural formula of the coupling agent N is as follows:
Figure BDA0002084246040000071
wherein the thermoplastic plastic is polyvinyl chloride.
Wherein the corresponding spraying amount of the modified liquid on the plate is 50ml/m2。
Example 4
An environment-friendly sustainable circulation type biomass composite fiber material is prepared by the following method:
(1) hot-pressing preparation of the core plate: uniformly mixing biomass fibers, a coupling agent N and thermoplastic powder, paving the mixture into a core layer plate blank with the thickness of 3-4 mm, putting the core layer plate blank into a hot press for hot pressing, wherein the hot pressing temperature is controlled to be 185 ℃, the hot pressing pressure is controlled to be 1.5MPa, and the core plate is obtained for later use after the hot pressing treatment is carried out for 3 min;
(2) hot-pressing preparation of the multilayer board: uniformly mixing biomass fibers, a coupling agent N and thermoplastic powder, paving the mixture into surface layer materials with the thickness of 2-3 mm, paving the surface layer materials on the upper surface and the lower surface of the core plate obtained in the step (1), before the paving treatment, spraying a modifying liquid on the upper surface and the lower surface of the core plate, putting the mixture which is formed by taking the core plate as a central layer and taking the surface layer materials as an upper layer and a lower layer into a hot press for hot pressing treatment, wherein the hot pressing temperature is controlled to be 185 ℃, the hot pressing pressure is controlled to be 1.5MPa, and the laminated plate is prepared for later use after the hot pressing treatment is carried out for 3 min; the modifying solution comprises the following components in percentage by weight: 3% of zinc borate, 2% of modifier M, 0.2% of phosphatidylethanolamine and the balance of water;
the structural formula of the modifier M is as follows:
Figure BDA0002084246040000072
(3) cold pressing treatment:
and (3) putting the multilayer board obtained in the step (2) into a cold press, controlling the pressure during cold pressing treatment to be 1.0MPa, and taking out the multilayer board when the temperature of the multilayer board is not more than 50 ℃ and naturally cooling the multilayer board to room temperature to obtain the environment-friendly sustainable circulation type biomass composite fiber material.
Wherein the mass ratio of the biomass fibers, the coupling agent N and the thermoplastic powder in the step (1) is 1: 0.05: 0.5.
wherein, the biomass fiber is rice straw.
Wherein the coupling agent N is kh 550.
Wherein the thermoplastic is polyethylene.
Wherein the corresponding spraying amount of the modifying liquid on the plate is 40ml/m2。
Comparative example 1
An environment-friendly sustainable circulation type biomass composite fiber material is prepared by the following method:
(1) hot-pressing preparation of the core plate: uniformly mixing biomass fibers, a coupling agent and thermoplastic powder, paving the mixture into a core layer plate blank with the thickness of 3-4 mm, putting the core layer plate blank into a hot press for hot pressing treatment, wherein the hot pressing temperature is controlled to be 185 ℃, the hot pressing pressure is controlled to be 1.5MPa, and the core plate is obtained for later use after the hot pressing treatment is carried out for 3 min;
(2) hot-pressing preparation of the multilayer board: uniformly mixing biomass fibers, a coupling agent and thermoplastic powder, paving the mixture into surface layer materials with the thickness of 2-3 mm, paving the surface layer materials on the upper surface and the lower surface of the core plate obtained in the step (1), before the paving treatment, spraying a modifying liquid on the upper surface and the lower surface of the core plate, putting the mixture which is formed by taking the core plate as a central layer and taking the surface layer materials as an upper layer and a lower layer into a hot press for hot pressing treatment, wherein the hot pressing temperature is controlled to be 185 ℃, the hot pressing pressure is controlled to be 1.5MPa, and the multi-layer plate materials are reserved after the hot pressing treatment is carried out for 3 min; the modifying solution comprises the following components in percentage by weight: 3% of zinc borate, 2% of tartaric acid, 0.2% of phosphatidylethanolamine and the balance of water;
(3) cold pressing treatment:
and (3) putting the multilayer board obtained in the step (2) into a cold press, controlling the pressure during cold pressing treatment to be 1.0MPa, and taking out the multilayer board when the temperature of the multilayer board is not more than 50 ℃ and naturally cooling the multilayer board to room temperature to obtain the environment-friendly sustainable circulation type biomass composite fiber material.
Wherein the mass ratio of the biomass fibers, the coupling agent and the thermoplastic powder in the step (1) is 1: 0.05: 0.5.
wherein, the biomass fiber is rice straw.
Wherein the coupling agent is kh 550.
Wherein the thermoplastic is polyethylene.
Wherein the corresponding spraying amount of the modifying liquid on the plate is 40ml/m2。
In order to clearly demonstrate the inventive concept of the present invention, examples 1, 4 and comparative example 1 are presented in the following table with differences.
And (3) effect characterization: the biomass composite fiber materials prepared in example 1, example 4 and comparative example 1 were subjected to a performance test in which the flexural strength was tested in accordance with ASTM D790; the impact strength is tested according to GB/T1043.1-2008, and the test results are as follows:
numbering Modifying agent Coupling agent Thickness of each layer Bending strength Impact strength
Example 1 Modifier M Coupling agent N 2/3/2(mm) 31.13MPa 7.59kJ/m2
Example 4 Modifier M kh550 2/3/2(mm) 30.15MPa 7.44kJ/m2
Comparative example 1 Tartaric acid kh550 2/3/2(mm) 28.46MPa 7.23kJ/m2
The results show that compared with the prior art that tartaric acid is adopted, the modification effect is more obvious and enhanced by adopting the modifier M to replace tartaric acid, the content and activity of the surface groups of the reinforced fibers are greatly improved, the cross-linking fusion is facilitated, the fiber refining and the fuzzing degree of the surface of the core plate are improved, the contact area and the affinity among the fibers are further facilitated, the quality of the composite fiber material is finally improved, and the technical problem that the bending strength and the impact strength of the biomass composite fiber material in the prior art are still lower is completely solved. In addition, the invention also adopts the coupling agent N to replace the common silane coupling agent kh550, silane coupling agent kh560 and silane coupling agent kh570, compared with the silane coupling agent kh550, silane coupling agent kh560 and silane coupling agent kh570, the coupling effect of the coupling agent N is more obvious, the bending strength and the impact strength of the composite fiber material can be improved to a certain extent, and the comprehensive performance of the material is further optimized.

Claims (4)

1. An environment-friendly sustainable circulation type biomass composite fiber material is characterized by being prepared by the following method:
(1) hot-pressing preparation of the core plate: uniformly mixing biomass fibers, a coupling agent N and thermoplastic powder, paving the mixture into a core layer plate blank with the thickness of 3-4 mm, placing the core layer plate blank into a hot press for hot pressing treatment, wherein the hot pressing temperature is controlled to be 185-195 ℃, the hot pressing pressure is controlled to be 1.5-2.5 MPa, and the core plate is obtained for later use after the hot pressing treatment is carried out for 3-5 min;
(2) hot-pressing preparation of the multilayer board: uniformly mixing biomass fibers, a coupling agent N and thermoplastic powder, paving the mixture into surface layer materials with the thickness of 2-3 mm, paving the surface layer materials on the upper surface and the lower surface of the core plate obtained in the step (1), before the paving treatment, spraying a modifying solution on the upper surface and the lower surface of the core plate, putting the mixture which is formed by taking the core plate as a central layer and taking the surface layer materials as an upper layer and a lower layer into a hot press for hot pressing treatment, wherein the hot pressing temperature is controlled to be 185-195 ℃, the hot pressing pressure is controlled to be 1.5-2.5 MPa, and the hot pressing treatment is carried out for 3-5 min to obtain a multi-layer plate for later use; the modifying solution comprises the following components in percentage by weight: 3% of zinc borate, 2% of modifier M, 0.2% of phosphatidylethanolamine and the balance of water;
the structural formula of the modifier M is as follows:
Figure 983990DEST_PATH_IMAGE001
；
(3) cold pressing treatment:
putting the multilayer board obtained in the step (2) into a cold press, controlling the pressure during cold pressing treatment to be 1.0-2.0 MPa, and taking out the multilayer board when the temperature of the multilayer board is not more than 50 ℃ and naturally cooling the multilayer board to room temperature to obtain the environment-friendly sustainable circulation type biomass composite fiber material;
the chemical structural formula of the coupling agent N is as follows:
Figure 229026DEST_PATH_IMAGE002
；
the mass ratio of the biomass fibers, the coupling agent N and the thermoplastic powder in the step (1) is 1: 0.05: 0.5.
2. the environment-friendly sustainable recycling biomass composite fiber material as claimed in claim 1, wherein the biomass fiber is any one of rice straw, wheat straw and bamboo fiber.
3. The environment-friendly sustainable recycling biomass composite fiber material as claimed in claim 1, wherein the thermoplastic is any one of polyethylene, polypropylene and polyvinyl chloride.
4. The environment-friendly sustainable circulation type biomass composite fiber material as claimed in claim 1, wherein the corresponding spraying amount of the modification liquid on the plate is 40-50 ml/m2。
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CN103739868A (en) * 2013-12-25 2014-04-23 湖北工业大学 Preparation method of plant fiber porous composite material
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