WO2010130095A1 - Poudre d'agent de liaison végétale et son procédé de préparation - Google Patents

Poudre d'agent de liaison végétale et son procédé de préparation Download PDF

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Publication number
WO2010130095A1
WO2010130095A1 PCT/CN2009/071795 CN2009071795W WO2010130095A1 WO 2010130095 A1 WO2010130095 A1 WO 2010130095A1 CN 2009071795 W CN2009071795 W CN 2009071795W WO 2010130095 A1 WO2010130095 A1 WO 2010130095A1
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Prior art keywords
plant
binder powder
less
vegetable
particles
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PCT/CN2009/071795
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English (en)
Chinese (zh)
Inventor
高宏
王晶
张力明
帕利托夫⋅阿内特里⋅A
维克托洛甫娜⋅古里亚茨莫娃⋅奥尔佳
彼得洛维奇⋅朱迪诺夫⋅弗拉迪斯拉夫
伊万诺维奇⋅拉莫夫斯基⋅奥莱格
扎哈洛维奇⋅拉雅霍夫⋅尼古拉
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嘉兴市禾森建材有限公司
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Application filed by 嘉兴市禾森建材有限公司 filed Critical 嘉兴市禾森建材有限公司
Priority to PCT/CN2009/071795 priority Critical patent/WO2010130095A1/fr
Publication of WO2010130095A1 publication Critical patent/WO2010130095A1/fr

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Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J197/00—Adhesives based on lignin-containing materials
    • C09J197/02—Lignocellulosic material, e.g. wood, straw or bagasse

Definitions

  • Plant binder powder and preparation method thereof Plant binder powder and preparation method thereof
  • the present invention relates to a vegetable binder powder and a process for the preparation thereof. More particularly, the present invention relates to plant binder powders derived from plant parts comprising lignin/cellulose/hemicellulose and/or amorphous silica, in particular from plant husks, plant foliage, processing residues Or a combination of vegetable binder powders. Background technique
  • Zhao Linbo Zhao Linbo, Technical History of Rice Shell Development, Journal of Northeast Forestry University, Vol. 33, No. 3, p83-844 pointed out that various agricultural and sideline products can be used as substitute raw materials for wood-based panels, and the key points are introduced.
  • the technology for producing wood-based panels using rice husks is at various stages of development at home and abroad.
  • Cheng Xunzhen (Chengxun, Rice Shell Production Technology, Southern Agricultural Machinery, 2002.2, p26) introduced a technique for producing rice husk: the rice husk was crushed and ground to 40 mesh by a pulverizer and a grinder; The shredded rice husk is mixed with an adhesive, a curing agent, a flame retardant, etc., and after being subjected to a process such as paving, hot pressing, etc., a rice hull plate is obtained, which can be used as a wallboard, a ceiling, or the like.
  • a common feature in wood-based panels or in non-wood plant fiber panels is the addition of various binders, especially organic binders such as phenolic resins, urea-formaldehyde resins and isocyanate resins. .
  • organic binders such as phenolic resins, urea-formaldehyde resins and isocyanate resins.
  • these organic binders contain more or less chemical components harmful to humans, such as volatile organic compounds such as furfural, aromatic substances, and the like.
  • the harmful chemical components contained in these wood-based panels will be released, pollute the environment, and seriously endanger human health.
  • people's requirements for the living environment and their own health improve, there is no need for chemical contamination of the office supplies and household products used. Therefore, the search for natural, non-polluting alternative binders has become a trend.
  • a vegetable binder powder derived from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, wherein the vegetable binder powder
  • the particles having a medium size of less than 400 mesh account for at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles.
  • the plant binder powder has a size of 30 mils or less (for example, 28 mils or less, 25 mils or less, 23 mils or less, 22 mils or less, 21 micrometers or less).
  • the particles comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles.
  • the vegetable binder powder has a size of 2 (below glutinous rice or less (for example, 19 meters or less, 18 mils or less, 17 mils or less, 16 mils or less, 15 inches).
  • the particles below m, below 14 mm, below 13 mm, below 12 microns, below 11 microns account for at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, of the total weight of the total particles. Most preferably at least 90%; further preferably the particles of the plant binder powder having a size of 10 microns or less account for at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, most of the total weight of the total particles.
  • the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of plant skins, plant foliage, processing residues, or combinations thereof .
  • the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of: bark, sawdust, straw, corn cob, chaff, bagasse or combination.
  • the chaff is a rice husk.
  • a vegetable binder powder for preparing the first aspect of the invention comprises comminuting a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica.
  • the grinding is carried out using a grinder to effect pulverization.
  • the plant binder powder has a size of 30 mils or less (for example, 28 mils or less, 25 mils or less, 23 mils or less, 22 mils or less, 21 micrometers or less).
  • the particles comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles.
  • the plant binder powder has a size of 2 (below glutinous rice or less (for example, 19 meters or less, 18 mils or less, 17 mils or less, 16 mils or less, 15 inches).
  • the particles below m, below 14 mm, below 13 mm, below 12 microns, below 11 microns account for at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, of the total weight of the total particles. Most preferably at least 90%; further preferably the particles of the plant binder powder having a size of 10 microns or less account for at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, most of the total weight of the total particles.
  • the vegetable binder powder is derived from bark, sawdust, straw, corn cob, chaff, bagasse or a combination thereof.
  • the chaff is a rice husk.
  • a method of preparing a vegetable binder powder of the third aspect of the invention comprising pulverizing a plant coat, plant foliage, a processing residue or a combination thereof.
  • the grinding is carried out using a grinder to effect pulverization.
  • a composition comprising the vegetable binder powder of the first and second aspects of the invention.
  • the composition further comprises other materials for making the board.
  • Fig. 1 is a scanning electron microscope (SEM) photograph of a conventional high-density plate section of the prior art, in which Fig. 1(a) has a magnification of 100 times and Fig. 1(b) has a magnification of 500 times.
  • SEM scanning electron microscope
  • FIG. 2 is a SEM photograph of a section of a rice hull plate without other binders produced in Example 7 of the present application, wherein the magnification of FIG. 2(a) is 100 times, and the magnification of FIG. 2(b) is 500. Times.
  • FIG. 3 is a SEM photograph of the surface of a rice hull plate without other binders produced in Example 7 of the present application, wherein the magnification of FIG. 3(a) is 60 times, and the magnification of FIG. 3(b) is 1000 times. .
  • Fig. 4 is a photograph of a rice hull plate without other binders produced in Example 8 of the present application.
  • Figure 5 is a photograph of a rice hull plate without other binders produced in Example 9 of the present application. detailed description
  • crust includes shells of various cereal plants, including but not limited to: for example, rice hulls, such as shells of various wild rice, hybrid rice, etc.; wheat hulls, such as barley, wheat, oats, etc. Shell; shell of millet; shell of sorghum and so on.
  • plant skin includes the outer skin of various plants, such as the bark of trees, such as the bark of fruit trees such as apple trees, pear trees, peach trees, vines, and cherry trees.
  • straw refers to the portion of the stem of the stem after harvesting of the crop seed.
  • the straw includes straw and by-products of rice, wheat, rape, corn and the like.
  • sawdust refers to the last wood chips of the tree itself that are scattered from the trees during the wood processing, usually the scraps produced by the sawn wood.
  • sawdust there is no particular limitation on the type of tree in which the sawdust is produced, and sawdust produced from any tree, such as sawdust of pine, wood, fir, or the like, can be used.
  • corn cob refers to the core remaining after the corn kernels are removed.
  • bagasse refers to the residue of sugar cane sugar, which is an important by-product of the sugar cane sugar industry. Product. In the present application, the residue after sugar cane sugar can be directly used, and the bagasse which has been removed from the cane pulp can also be used.
  • plant foliage refers to the branches and leaves of a plant, and there is no particular restriction on the species of the plant.
  • the term "derived from” means obtained from plants, in particular parts of plants, such as mechanical milling.
  • “from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica” means that the vegetable binder powder can be derived from lignin/cellulose/hemicellulose and/or The plant parts of the amorphous silica are obtained by processing, for example, mechanical milling.
  • plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica means a plant part comprising lignin, a plant part comprising cellulose, a plant part comprising hemicellulose, comprising none A plant part of the shaped silica, or a plant part comprising any combination of lignin, cellulose, hemicellulose, and amorphous silica.
  • other raw materials for making sheets refers to various fiber raw materials known in the art for producing wood-based panels, including but not limited to: for example, wood, wood chips, rice husks, corn stalk fibers (see Chinese invention patent application CN1316318A). , long-stem fiber plants (such as rough, rice straw, bagasse, kenaf, etc.) (see Chinese invention patent application CN1159980A), coconut shell (see WO2004/050317) and the like.
  • a vegetable binder powder derived from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, wherein the vegetable binder powder
  • the particles having a median size of less than 400 mesh account for at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles.
  • the vegetable binder powder is derived from plants and belongs to the category of natural, non-polluting green binders.
  • the following examples can prove that the vegetable binder powder has an adhesive function similar to that of a conventional organic binder, and can be used in various fields such as wood-based panels such as particleboard and MDF.
  • the inventors of the present invention speculate that the possible mechanism is: Generally, plant cells have a diameter on the order of tens to hundreds of micrometers, and when the plant fraction is pulverized to a sufficiently small particle size, for example, a powder of about 1-10 micrometers, the plant cell wall is broken. Thereby, some of the components are released, and these components may have an adhesive action, thereby imparting a function of adhesion of the obtained product during hot pressing.
  • the surface hydroxyl group is increased due to mechanical activation, so that a polycondensation reaction between hydroxyl groups occurs during hot pressing.
  • the powder has an adhesive function. It has further been found that plant binder powders derived from plant parts comprising lignin/cellulose/hemicellulose and/or amorphous silica and having a size of less than 400 mesh and at least 10% of the total weight of the total particles are in heat.
  • the adhesive process has a glue function similar to that of a conventional organic binder.
  • the plant binder powder has a size of 30 meters or less (for example, 28 meters or less, 25 meters or less, 23 cm or less, 22 cm or less, 21 cm or less, 20 m or less, 19 ⁇ ).
  • Particles below m, below 18 mm, below 17 mm, below 16 microns, below 15 microns, below 14 microns, below 13 microns, below 12 microns, below 11 microns account for at least 10% of the total weight of all particles, preferably At least 30%, more preferably at least 50%, still more preferably at least 70%, most preferably at least 90%; further preferably the particles of the plant binder powder having a size of 10 microns or less account for at least 10%, preferably at least the total weight of the total particles.
  • the particles in the plant binder powder having a size of 5 microns or less account for at least 10%, preferably at least 30% of the total weight of the total particles. %, more preferably at least 50%, still more preferably at least 70%, most preferably at least 90%.
  • the present application is not particularly limited to a plant part containing lignin/cellulose/hemicellulose and/or amorphous silica as long as the part can be processed to obtain a vegetable binder powder required for the present application.
  • the vegetable binder powder of the present application is derived from plant husks, plant foliage, processing residues, or combinations thereof.
  • the processing residues of many agricultural by-products belong to plant parts comprising lignin/cellulose/hemicellulose and/or amorphous silica. Accordingly, the present invention can utilize these processing residues to produce the vegetable gum powder of the present invention, which both increases the utility of these processing residues and reduces the added cost and resulting in disposal of these processing residues. Environmental pollution.
  • the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of: bark, sawdust, straw, corn cob, chaff, bagasse or combination. At this time, bark, sawdust, straw, corn cob, chaff, and bagasse can all be in the form of processing residues.
  • the chaff is preferably a rice husk.
  • a method of preparing a vegetable binder powder of the first aspect of the present application the method comprising pulverizing a plant comprising lignin/cellulose/hemicellulose and/or amorphous silica section.
  • a grinder can be used for grinding to prepare the present application. Please plant binder powder.
  • the grinding and pulverizing method generally comprises two steps: coarse pulverization and deep grinding.
  • the coarse pulverization is to pulverize a plant part, such as a processing residue, containing lignin/cellulose/hemicellulose and/or amorphous silica into coarse particles by a pulverizer, a general grinder or the like, for example, having a particle size of about 400 meshes.
  • a pulverizer a general grinder or the like, for example, having a particle size of about 400 meshes.
  • the ground pulverization can also be carried out by directly grinding a plant portion containing lignin/cellulose/hemicellulose and/or amorphous silica, for example, a work residue.
  • a plant portion containing lignin/cellulose/hemicellulose and/or amorphous silica for example, a work residue.
  • the above pre-cut processing may not be performed.
  • the coarse particles have a water content of not more than 20%, more preferably not more than 10%.
  • the coarse pulverization and deep grinding can be carried out in any machine capable of bringing a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, for example, a processing residue, to a desired particle size, for example, using Taian
  • the straw pulverizer or rice husk pulverizer produced by Taifeng Agriculture and Animal Husbandry Machinery Factory in Daiyue District of the city is coarsely pulverized. It can also be coarsely ground using a wood powder machine manufactured by Zhengzhou Zhongyuan Powder Equipment Factory. Deep grinding can be used.
  • AGO series ball mills produced by the Institute of Solid Chemical and Mechanical Chemistry of the Russian Academy of Sciences for example, include AGO _ 2, AGO - 3, AGO - 5, etc., and Zhejiang Fengli Crushing Equipment Co., Ltd. CZJ self-grinding type superfine pulverizer and so on.
  • the conditions for coarse comminution and deep grinding are not critical and depend on the machinery used. Those skilled in the art can determine reasonable operating conditions based on the machinery selected.
  • a vegetable binder powder wherein the plant binder powder has a size of less than 400 mesh particles of at least 10% by weight of the total particles, and the plant binder powder is derived from a plant skin, Plant foliage, processing residues, or a combination thereof.
  • the vegetable adhesive powder of the third aspect of the invention has an adhesive function similar to that of a conventional organic binder. The possible principles are as described above.
  • the vegetable binder powder is derived from bark, sawdust, straw, corn cob, chaff, bagasse or a combination thereof.
  • the chaff is a rice husk.
  • the vegetable binder powder has a size of 30 microns or less (for example, 28) Below micron, below 25 microns, below 23 microns, below 22 microns, below 21 microns, below 20 microns, below 19 mm, below 18 mm, below 17 mm, below 16 cm, below 15 nm, 14 ⁇ Particles below m, below 13 mm, below 12 mm, below 11 mm account for at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, most preferably at least 10% of the total weight of the total particles.
  • the vegetable binder of the third aspect of the invention may also be prepared by a method similar to that described in the second aspect.
  • a fourth aspect of the invention provides a method of preparing a vegetable binder of the third aspect of the invention, comprising comminuting a plant skin, plant foliage, processing residue, or a combination thereof.
  • pulverization can be performed by a grinder.
  • the grinding and pulverizing method of the fourth aspect of the invention generally comprises two steps: coarse pulverization and deep grinding.
  • the coarse pulverization is to pulverize the plant hull, the plant leaves, the processing residue or a combination thereof into coarse particles by a pulverizer, a general grinder or the like, for example, particles having a particle size of about 400 mesh to several tens of millimeters; and then, the coarse particles are added thereto.
  • the deep grinding is carried out in a depth grinder to obtain a desired particle size range, that is, the plant binder powder of the third aspect of the invention can be obtained.
  • the grinding and pulverization can also be carried out by directly grinding the plant skin, the plant leaves, the processing residue or a combination thereof by deep grinding.
  • the above pre-cut processing may not be performed.
  • the coarse particles have a water content of not more than 20% by weight, more preferably not more than 10% by weight.
  • the coarse pulverization and deep grinding can be carried out in any machine capable of achieving the desired particle size of the plant skin, plant foliage, processing residue or a combination thereof, for example, straw produced by Taifeng Agriculture and Animal Husbandry Machinery Plant of Daiyue District, Tai'an City can be used.
  • the pulverizer or the rice husk mill is used for coarse pulverization. It can also be coarsely ground using a wood powder machine produced by Zhengzhou Zhongyuan Powder Equipment Factory. Deep grinding can be used.
  • AGO series ball mills produced by the Institute of Solid Chemical and Mechanical Chemistry of the Russian Academy of Sciences for example, include AGO _ 2, AGO - 3, AGO - 5, etc., and Zhejiang Fengli Crushing Equipment Co., Ltd. CZJ self-grinding type superfine pulverizer and so on.
  • the conditions of coarse pulverization and deep grinding are not critical. And depends on the machinery used. Those skilled in the art can determine reasonable operating conditions based on the machinery selected. In general, the conditions required for coarse comminution are determined by the feed conditions for deep comminution. The requirements of the deep pulverizing machine for feeding are achieved by coarse pulverization.
  • a composition comprising the vegetable binder powder of the first and second aspects of the invention.
  • the composition may optionally contain other conventional materials for making the board, in addition to the vegetable binder powder, such as is known in the art for making wood based panels.
  • Fiber raw materials including but not limited to: wood chips, rice husks, corn stalk fibers, coarse stalks, rice straw, bagasse, kenaf, coconut shells, etc.
  • the vegetable binder powder is at least 5% by weight, preferably at least 10% by weight, more preferably at least 20%, at least 30% by weight, at least 40% by weight, based on the weight of the composition, At least 50% by weight.
  • the vegetable binder powders of the present application and compositions comprising the vegetable binder powders are particularly useful in the manufacture of artificial panels such as rice hulls and MDF.
  • the rice husk processed by the grain rice (having a water content of ⁇ 10%) is used as a raw material for producing the vegetable binder powder, and the rice husk can be dried in order to meet the water content requirement.
  • the rice husks were coarsely pulverized into about 3 mm using a rice husk pulverizer produced by Taifeng Agriculture and Animal Husbandry Machinery Plant in Daiyue District, Tai'an City.
  • This coarse comminution process is a general procedure used in the manufacture of rice hulls in the art.
  • the rice hull powder obtained in this step is generally used in the prior art as a raw material for producing rice hull sheets.
  • the crushed rice husks were placed in an AGO-2 ball mill developed by the Institute of Solid Chemical and Mechanical Chemistry of the Russian Academy of Sciences, and subjected to deep grinding for 10 minutes to stop grinding to obtain a vegetable binder powder.
  • the particles of the plant binder powder having a size of 20 ⁇ m or less accounted for 90% or more of the total weight of the total particles as determined by a particle size analyzer test analysis method.
  • Example 2 Preparation of Vegetable Binder Powder
  • Example 1 was repeated except that the cedar sawdust (having a water content of ⁇ 10 - 20%) was used as a raw material for producing a vegetable binder powder, thereby obtaining a plant binder powder. According to the method of Example 1, the particles of the plant binder powder having a size of 20 ⁇ m or less accounted for 90% or more of the total weight of the total particles.
  • Example 3 Preparation of Vegetable Binder Powder
  • Example 1 was repeated except that corn stover (having a water content of ⁇ 10%) was used as a raw material for producing a vegetable binder powder, thereby obtaining a plant binder powder.
  • corn stover having a water content of ⁇ 10%
  • the particles of the plant binder powder having a size of 20 ⁇ m or less accounted for 90% or more of the total weight of the total particles.
  • Example 4 Preparation of Vegetable Binder Powder
  • Example 1 was repeated except that a corn cob (having a water content of ⁇ 10%) was used as a raw material for producing a vegetable binder powder, thereby obtaining a vegetable binder powder. According to the method of Example 1, the particles having a size of 20 ⁇ m or less in the plant binder powder accounted for more than 90% of the total weight of the total particles.
  • Example 5 Preparation of Vegetable Binder Powder
  • Example 1 was repeated except that bagasse (having a water content of ⁇ 10%) was used as a raw material for producing a vegetable binder powder, thereby obtaining a plant binder powder. According to the method of Example 1, the particles having a size of 20 ⁇ m or less in the plant binder powder accounted for 90% of the total weight of all the particles.
  • Example 6 Preparation of Vegetable Binder Powder
  • Example 1 was repeated except that apple bark (having a water content of ⁇ 10%) was used as a raw material for producing a vegetable binder powder, thereby obtaining a vegetable binder powder. According to the method of Example 1, the particles having a size of 20 ⁇ m or less in the plant binder powder accounted for 90% or more of the total weight of all the particles.
  • the vegetable binder powder prepared in Example 1 was mixed with 40-mesh broken rice hull which was coarsely pulverized without deep grinding, wherein the weight ratio of the vegetable binder powder to the 40-mesh broken rice hull was 1:1, Mixture;
  • the thickness of the mixture is about 3-4 times the thickness of the formed sheet
  • the hot press forming is carried out by a continuous multi-stage hot press at a pressure of 5 MPa, a temperature of 170 - 200 ° C and a time of 3 minutes.
  • the obtained sheet was subjected to heat preservation and setting, and the pressure of the heat preservation type was 4 MPa, the temperature was 100 - 130 ° C, and the time was 3 minutes.
  • the sheet can be directly produced without heat setting after hot press forming.
  • Example 7 was repeated except that the vegetable binder powder prepared in Example 2 was used for the production of the board.
  • Example 9 A photograph of the sheet prepared in Example 8 is shown in Fig. 4.
  • Example 9 A photograph of the sheet prepared in Example 8 is shown in Fig. 4.
  • Example 7 was repeated except that the vegetable binder powder prepared in Example 3 was used for the production of the board.
  • Example 10 A photograph of the sheet prepared in Example 9 is shown in Fig. 5.
  • Example 10 Example 7 was repeated except that the vegetable binder powder prepared in Example 4 was used for plate making.
  • Example 7 was repeated except that the vegetable binder powder prepared in Example 5 was used for the production of the board.
  • Example 7 was repeated except that the vegetable binder powder prepared in Example 6 was used for the production of the board.
  • Example 7 was repeated except that 40 mesh broken rice husk was not used, and 100% of the vegetable binder powder obtained in Example 1 was used to produce a board.
  • the properties of the panels obtained in Example 7 were determined in accordance with the method specified in the National Standard of the People's Republic of China - Physical and chemical properties test method for wood-based panels and veneered panels (GB/T 17657-1999):
  • the moisture content is determined according to the method specified in 4.3 of GB/T 17657-1999.
  • the water absorption thickness expansion rate is determined according to the method specified in 4.5 of GB/T 17657-1999. Soaking time 24h ⁇ 15min.
  • the internal bond strength was measured according to the method specified in 4.8 of GB/T 17657-1999.
  • Modulus of elasticity 3240 Mpa 2700 Mpa
  • the density of 1460 g / cm 3 450-880 g / cm 3 or more results show that the use of the plant binder of the present application can obtain completely environmentally friendly formed sheets without adding any conventional inorganic or organic binders, and these sheets have Good performance.
  • Table 1 the inner bond strength, static bending strength, elastic modulus, water absorption thickness expansion ratio, etc. of the obtained sheet can reach or exceed the requirements of GB/T 17657-1999.
  • the sheet of Example 13 was also measured in the same manner as above, and its performance was found to be superior to that of the sheet produced in Example 7.
  • the vegetable binder powder was prepared according to the method of Example 1, except that the CZJ self-grinding ultrafine pulverizer produced by Zhejiang Fengli Crushing Equipment Co., Ltd. was used to replace the AGO developed by the Institute of Solid Chemical and Mechanical Chemistry of the Russian Academy of Sciences. - 2 ball mill, measured by a particle size analyzer test analysis method, the particles of the plant binder powder having a size of 20 ⁇ m or less accounted for 10% of the total weight of the total particles.
  • Example 7 was repeated except that the 40 mesh broken rice husk was not used, and 100% of the above obtained vegetable binder powder was used to manufacture the sheet.
  • the board was prepared under the same conditions as in Example 7, except that the plant binder powder of the present invention prepared in Example 1 was not added to the mixture, but the sheet was prepared from the 40-mesh husk without deep grinding. .
  • Fig. 2 is a SEM photograph of a section of the rice hull sheet, wherein the magnification of Fig. 2(a) is 100 times, and the magnification of Fig. 2(b) is 500 times.
  • Fig. 3 is a SEM photograph of the surface of the rice hull plate, wherein the magnification of Fig. 3(a) is 60 times, and the magnification of Fig. 30);) is 1000 times.
  • Fig. 1 is a SEM photograph of the cross section thereof, wherein the magnification of Fig. 1(a) is 100 times, and the magnification of Fig. 1(b) is 500 times.
  • the high-density fiberboard is composed of long-shaped wood fibers, which are not dense in density and have voids in the middle, which is more apparent in Fig. 1(b) where the magnification is high below. It can be seen from the enlarged photograph of the higher magnification of Fig. 1(b) that the high-density fiberboard is composed of long-shaped wood fibers, and the section is the fracture of the individual fibers after the fracture, and there is a clear gap between the fibers.
  • the rice hull sheet of the present application is a photograph of the fracture of the bonded tissue after tearing, and there is no significant gap between the tissues.
  • the high-magnification photograph of Fig. 2(b) in the fracture photograph after the tearing of the bonded tissue, there is no characteristic of the individual fibrous tissue after fracture.
  • the sheet of the present application has a dense sheet-like structure.
  • the rice husk powders after pressing, have been cemented together rather than tightly packed, and the fracture is also a ductile fracture rather than a brittle fracture.

Abstract

La présente invention se rapporte à une poudre d'agent de liaison végétale et à son procédé de préparation. La poudre d'agent de liaison végétale est fabriquée à partir d'une plante comprenant de la lignine/de la cellulose/de l'hémicellulose et/ou du SiO2 amorphe. Le pourcentage de particules de poudre sous 400 mesh par rapport au total de particules de poudre est au moins de 10 % en poids. La poudre d'agent de liaison végétale est adhésive et peut être utilisée comme agent de liaison dans la préparation de cartes.
PCT/CN2009/071795 2009-05-14 2009-05-14 Poudre d'agent de liaison végétale et son procédé de préparation WO2010130095A1 (fr)

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