KR20170119649A - Carbohydrate composition, article comprising the same and method of manufacturing crosslinked saccharides - Google Patents

Carbohydrate composition, article comprising the same and method of manufacturing crosslinked saccharides Download PDF

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KR20170119649A
KR20170119649A KR1020170050298A KR20170050298A KR20170119649A KR 20170119649 A KR20170119649 A KR 20170119649A KR 1020170050298 A KR1020170050298 A KR 1020170050298A KR 20170050298 A KR20170050298 A KR 20170050298A KR 20170119649 A KR20170119649 A KR 20170119649A
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South Korea
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carbohydrate
compound
binder
crosslinking agent
carbohydrate composition
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KR1020170050298A
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Korean (ko)
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KR101977463B1 (en
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서정현
송영훈
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영남대학교 산학협력단
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    • 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
    • B27N1/00—Pretreatment of moulding material
    • B27N1/02—Mixing the material with binding agent
    • B27N1/0209—Methods, e.g. characterised by the composition of the agent
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H3/00—Compounds containing only hydrogen atoms and saccharide radicals having only carbon, hydrogen, and oxygen atoms
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
    • C10L5/06—Methods of shaping, e.g. pelletizing or briquetting
    • C10L5/10—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders
    • C10L5/14—Methods of shaping, e.g. pelletizing or briquetting with the aid of binders, e.g. pretreated binders with organic binders
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
    • C10L5/442—Wood or forestry waste
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C1/00—Building elements of block or other shape for the construction of parts of buildings
    • E04C1/40—Building elements of block or other shape for the construction of parts of buildings built-up from parts of different materials, e.g. composed of layers of different materials or stones with filling material or with insulating inserts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/26—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials composed of materials covered by two or more of groups E04C2/04, E04C2/08, E04C2/10 or of materials covered by one of these groups with a material not specified in one of the groups
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/30—Columns; Pillars; Struts
    • E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/32—Molding or moulds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The present application relates to a carbohydrate composition wherein the carbohydrate composition of the present application comprises a carbohydrate compound having a hydroxy group and a compound capable of ionizing in water to emit metal cations and hydroxide ions as a crosslinking agent, When it is produced, a molded article having excellent strength can be provided.

Description

TECHNICAL FIELD The present invention relates to a carbohydrate composition, a molded article containing the same, and a method for producing a crosslinked saccharide. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carbohydrate composition,

The present application relates to a carbohydrate composition, a molded article comprising the same, and a process for producing a crosslinked saccharide.

Recently, development of alternative energy due to global warming and depletion of fossil fuels due to climate change due to energy and environmental problems has become a hot topic not only in Korea but also around the world. In particular, research on the development of renewable energy that can replace fossil fuels, especially in developed countries, is actively under way. At the center is the focus on biomass resources. Biomass refers to all organic matter generated in nature such as grain, wood, sewage sludge or manure, as well as wastes such as food generated from human activities. Biomass is widely used in various fields such as fuel, building materials and polymer materials, and researches for increasing the utilization thereof are actively under way.

Particularly, when biomass such as sawdust is utilized for heating fuel or building materials, it is processed into pellets or briquettes so as to enhance transportation efficiency or storage capacity and to be conveniently used by users (Patent Documents 1 and 2). However, the pellets produced using only the sawdust have a problem that they easily break during transportation. Accordingly, there is a demand for research and development of a material for producing a biomass molded article having excellent strength.

Patent Document 1: KR10-1442689 B

Patent Document 2: KR2011-0096195 A

The present application provides a carbohydrate composition for producing a molded article exhibiting excellent strength, and a molded product manufactured using the carbohydrate composition, and a manufacturing method for crosslinking saccharides using a simple process.

The present application relates to carbohydrate compositions. Exemplary carbohydrate compositions of the present application include a carbohydrate compound having a hydroxy group; And a compound capable of ionizing metal ions and hydroxide ions in a polar solvent such as water as a crosslinking agent. The hydroxy group of the carbohydrate compound binds to the metal cation, and the hydroxide ion hydrolyzes the glucoside bond of the carbohydrate compound above the disaccharide. For example, by decomposing sucrose into glucose and fructose, it is possible to increase the number of hydroxy group sites capable of binding with metal cations. Accordingly, when a molded article is produced using the composition, a molded article having excellent strength can be provided.

The carbohydrate composition according to one embodiment of the present application comprises a binder and a cross-linking agent.

The binder comprises a carbohydrate compound. In the present application, the term " carbohydrate compound " means a compound consisting of three elements of carbon (C), hydrogen (H) and oxygen (O) or a compound comprising at least two hydroxy groups (-OH) and at least one aldehyde group Means a compound having a ketone group (-CO). Also, in the present application, the carbohydrate compound and the saccharide can be used in the same sense.

The carbohydrate compound may have 4 or more hydroxyl groups, and may have, for example, 6 or more or 8 or more hydroxyl groups.

In one example, the carbohydrate compound may have at least one carbon ring structure having from 3 to 10 carbon atoms, and may have at least one carbon ring structure having, for example, from 4 to 8 carbon atoms or from 5 to 7 carbon atoms.

The carbohydrate compound having at least 4 hydroxy groups and having at least one carbon ring structure having 3 to 10 carbon atoms is exemplified by oligosaccharides such as monosaccharides, disaccharides, trisaccharides, polysaccharides and polysaccharides, carbohydrate derivatives and mixtures thereof Lt; / RTI >

The monosaccharide comprises, for example, a single unit of polyhydroxyaldehyde which forms an intramolecular hemiacetal of a structure comprising a five-carbon ring and a six-membered ring of one oxygen atom. In one example, the monosaccharide may include pentose, hexose, chilled sugar, palatinose, or sugar. Examples of the pentose sugar include arabinose, xylose, ribulose, ribose, deoxyribose, xylobiose, or ligrose. Etc. may be exemplified. Examples of the above-mentioned saccharide include galactose, glucose, mannose, sorbose, fructose, and the like. Examples of the chitosan sugar include sedoheptolose and the like, and examples of the sugar chain include neuraminic acid and the like, but the present invention is not limited thereto.

The disaccharide means a carbohydrate compound in which the two monosaccharides are glycosidically linked. Examples of the disaccharide include trehalose, xylobiose, maltose, isomaltose, laminaribiose, But are not limited to, cellobiose, gentiobiose, lactose, sucrose, and the like. The term " glycosidic bond " is used herein to mean a mixture of an anomeric hydroxyl group of a saccharide or a saccharide derivative (glycone) with another saccharide or non-saccharide organic compound (aglycone), for example, Quot; refers to a kind of chemical bond formed on the substrate. The trisaccharide means a carbohydrate compound in which the three monosaccharides are glycosidically linked. Examples thereof include, but are not limited to, raffinose, melecitose or maltotriose.

The above-mentioned saccharides means a carbohydrate compound in which four monosaccharides are glycosidically linked, and examples thereof include, but are not limited to, acabose or stachyose.

The polysaccharide may be, for example, a simple polysaccharide having 10 or more molecules of the same kind of monosaccharide or a complex polysaccharide having two or more kinds of monosaccharides bonded to each other. Examples of the simple polysaccharide include starch, glycogen or cellulose, and examples of the complex polysaccharide include hemicellulose, pectin and hyaluronic acid, but are not limited thereto.

Examples of the carbohydrate derivative include arabitol, xylitol, galactitol, sorbitol, mannitol or methyl glucopyranoside, and the like. But is not limited thereto.

In one embodiment, the carbohydrate compound having at least 4 hydroxy groups may be at least one saccharide selected from the group consisting of disaccharides, trisaccharides, polysaccharides and polysaccharides, preferably disaccharides, more preferably sucrose, But is not limited thereto.

The binder may comprise a polar solvent in addition to the carbohydrate compound. The polar solvent may be, for example, water or ethanol, but is not limited thereto.

The carbohydrate composition of the present application further comprises a crosslinking agent satisfying the following formula (1) together with the above-mentioned binder.

[Chemical Formula 1]

MX n

M is a monovalent or divalent metal,

X is oxygen or a hydroxy group,

n is 1 to 2;

The crosslinking agent may be ionized in water to give a monovalent or divalent metal cation and hydroxide ion (OH < - & gt ; ). The metal cation binds to the hydroxy group of the carbohydrate compound. The hydroxide ion may increase the number of hydroxy groups in the hydrocarbon compound capable of binding to the metal cation by hydrolyzing the glucoside bond of the carbohydrate compound above the disaccharide. Accordingly, when a molded article is produced using the composition, a molded article having excellent strength can be provided.

In one example, in the above formula (1), M is a monovalent or divalent metal element. For example, M is a metal element such as sodium (Na), potassium (K), rubidium (Rb) (Na), potassium (K), and the like, preferably alkali earth metal elements such as beryllium (Be), magnesium (Mg), calcium (Ca), or strontium (Sr) , Calcium (Ca), or magnesium (Mg).

In one embodiment, the crosslinking agent represented by Formula 1 is selected from the group consisting of sodium hydroxide (NaOH), magnesium oxide (MgO), magnesium hydroxide (Mg (OH) 2 ), potassium oxide (K 2 O), potassium hydroxide (CaO), and calcium hydroxide (Ca (OH) 2 ). For example, when calcium oxide (CaO) or calcium hydroxide (Ca (OH) 2 ) is used as a crosslinking agent and sucrose is used as a carbohydrate compound, the crosslinking agent is a mixture of calcium cation (Ca 2 + ) and hydroxide ion It is ionized to the - (OH). The calcium cation may form an ionic bond with the hydroxyl group of sucrose to perform a crosslinking function. In addition, the hydroxide ion can increase the equivalence of a hydroxy group capable of binding with a metal cation in a hydrocarbon compound by hydrolyzing a glucoside bond of sucrose to decompose into glucose and fructose.

In one example, the molar ratio of the carbohydrate compound to the crosslinking agent represented by Formula 1 may be 1: 1 or more. By controlling the molar ratio of the carbohydrate compound and the crosslinking agent to the above range, the crosslinking agent and the carbohydrate compound can stably and stably bind. Accordingly, when the carbohydrate composition is used to produce a molded article to be described later, heat resistance, impact resistance and compressive strength of the molded article can be improved. When the molar ratio is less than 1: 1, the equivalent amount of the cationic metal capable of ionic bonding with the hydroxy group of the carbohydrate compound may be insufficient, and the effect of improving the heat resistance, impact resistance and compressive strength of the produced molded article may be deteriorated.

In one example, the content of the cross-linking agent in the carbohydrate composition can be controlled by the equivalence of the hydroxy group of the carbohydrate compound and the type of cross-linking agent, and the molar ratio of the carbohydrate compound to the cross-linking agent is 1: 2 to 1: 4 have. Specifically, when X of the above-described formula (1) is a crosslinking agent, the molar ratio of the carbohydrate compound to the crosslinking agent may be 1: 2.5 to 1: 4, and preferably 1: 2.5 to 1: 3.5. Further, when X in the above-mentioned formula (1) is a crosslinking agent, the molar ratio of the carbohydrate compound to the crosslinking agent may be 1: 2 to 1: 3.5, preferably 1: 2 to 1: 3. When the molar ratio is more than 1: 4, for example, when it is 1: 5 or more, excessive amounts of a cross-linking agent not bonded to the carbohydrate compound may be present in the composition. The excessive amount of the cross-linking agent may lower the efficiency of the binder.

The content of the carbohydrate compound in the binder may be 40 parts by weight or more, and preferably 50 parts by weight or more based on 100 parts by weight of the binder. If the content of the carbohydrate compound is less than 40 parts by weight, the function as the binder may be insufficient.

In one example, the content of the carbohydrate compound in the binder may be appropriately selected according to the required physical properties of the molded article to be produced or the molar ratio of the carbohydrate compound and the cross-linking agent described above. For example, the physical properties may be the workability of the molded article, the handleability, or the compressive strength of the molded article. When the molar ratio of the carbohydrate compound to the crosslinking agent is 1: 1 or more, the content of the carbohydrate compound in the binder may be in the range of 40 to 90 parts by weight, preferably 50 to 75 parts by weight, based on 100 parts by weight of the binder.

In another embodiment, the carbohydrate composition may further comprise biomass. The biomass refers to an organism such as a plant that receives solar energy to synthesize an organic matter, an animal or a microorganism that uses them as food. In a broad sense, it means organic matter used as an energy source. For example, the biomass may be selected from the group consisting of paper, paper products, waste paper, wood, particleboard, sawdust, agricultural waste, sewage, silage, grasses, rice hulls, bargas, cotton, jute, hemp, flax, Such as sisal, manila hemp, straw, corncob, corn trough, switchgrass, alfalfa, hay, coconut hair, cotton, synthetic cellulose, seaweed, algae, But are not limited to, mixtures thereof.

In another embodiment, the carbohydrate composition of the present application may further comprise water in addition to the biomass.

For example, the content of water in the composition may be 5 to 30 parts by weight, 6 to 25 parts by weight or 7 to 20 parts by weight, and preferably 7 to 15 parts by weight, based on 100 parts by weight of the biomass. When the carbohydrate composition comprises water, it is easy to handle in the production process of a molded article to be described later, and the carbohydrate composition can be present in an aqueous solution state. Accordingly, the crosslinking agent is ionized into metal cations and hydroxide ions in an aqueous solution, and ionic bonding between the ionized cation metal and the carbohydrate compound can be promoted. In addition, the hydroxide ion can hydrolyze the glucoside bond of the carbohydrate compound, thereby increasing the hydroxyl group equivalent of the carbohydrate compound and increasing the number of the hydroxyl group sites bound to the metal ion. Furthermore, water itself can act as a crosslinking aid to assist the crosslinking of the carbohydrate compound itself by generating hydrogen ions and hydroxide ions. By controlling the content of water in the composition within the above range, it is possible to provide a carbohydrate composition for producing a molded article having excellent mechanical properties. In addition, a suitable fluidity of the carbohydrate composition can be ensured, and a molded article can be easily manufactured.

In one example, the carbohydrate composition further comprising water may be an aqueous solution having a pH of at least 8, at least 9, at least 10, at least 11, or at least 12, measured at a temperature of 25 ° C. The pH may be measured using a pH meter, but is not limited thereto. In the aqueous solution having a pH of 8 or more, there is a free hydroxyl group, and the free hydroxyl group can induce the hydrolysis of the glycosidic bond of the carbohydrate compound.

The present application relates to a molded article comprising a binder and a crosslinking agent.

In the present application, the meaning of including a binder and a crosslinking agent means that the carbohydrate compound of the binder includes a structure crosslinked by a crosslinking agent, as shown in Fig.

In one embodiment, the binder comprises a carbohydrate compound having at least four hydroxy groups, and the detailed description of the carbohydrate compound is the same as that described above for the carbohydrate composition.

The crosslinking agent is represented by the following formula (1), and the detailed description of the crosslinking agent is the same as that described in the above-mentioned carbohydrate composition.

[Chemical Formula 1]

MX n

M is a monovalent or divalent metal,

X is oxygen or a hydroxy group,

n is 1 to 2;

The molded product may be a processed product of biomass, which is an eco-friendly material. The biomass may be, for example, paper, paper products, waste paper, wood, particle board, sawdust, agricultural waste, sewage, silage, grasses, bargas, cotton, jute, hemp, flax , Bamboo, sisal, manila hemp, straw, corncobs, corn trough, switchgrass, alfalfa, hay, chaff, coconut hair, cotton, synthetic cellulose, seaweed, Algae, or a mixture thereof, and the biomass may be processed into a molded product through physical and chemical processes together with the above-mentioned binders and crosslinking agents.

In one embodiment, when the biomass is sawdust, the sawdust may be mixed with a binder and a cross-linking agent, and the mixture of sawdust, binder and cross-linking agent may be processed into pellets through a press. Compared with the case where the sawdust is processed alone, when it is mixed with a binder and a cross-linking agent and processed into pellets, it can have better heat resistance, impact resistance and compressive strength.

The present application relates to a method for producing the above-mentioned molded article.

Exemplary methods for producing a molded article of the present application include molding a carbohydrate composition containing a binder and a crosslinking agent into a mold. In one embodiment, the binder comprises a carbohydrate compound having at least four hydroxy groups, and the detailed description of the carbohydrate compound is the same as that described above for the carbohydrate composition.

The crosslinking agent is represented by the following formula (1), and the detailed description of the crosslinking agent is the same as that described in the above-mentioned carbohydrate composition.

[Chemical Formula 1]

MX n

M is a monovalent or divalent metal,

X is oxygen or a hydroxy group,

n is 1 to 2;

In one example, the shaping step may be a step of placing a mixture of the carbohydrate composition described above, for example sawdust, a binder and a cross-linking agent, into a mold and applying pressure to the press.

The press may be, for example, a hydraulic press, a mechanical press, or an opposed hydraulic press, but is not limited thereto.

The present application also relates to a method for crosslinking saccharides. Exemplary methods for making crosslinked sugars of the present application include crosslinking a carbohydrate compound having four or more hydroxy groups under conditions of pH 8 or higher.

In one example, the method may be a method of crosslinking a carbohydrate compound in an aqueous solution having a pH of at least 8, at least 9, at least 10, at least 11, or at least 12, measured by a pH meter at 25 ° C. In the aqueous solution having a pH of 8 or higher, there is a free hydroxyl group, and the free hydroxyl group can induce the hydrolysis of the glycosidic bond of the carbohydrate compound.

In another example, when the carbohydrate compound is crosslinked in an aqueous solution together with the compound of formula (1), the aqueous solution containing the crosslinking agent may exhibit a basicity of 8 or more, as measured by a pH meter at 25 ° C.

[Chemical Formula 1]

MX n

M is a monovalent or divalent metal,

X is oxygen or a hydroxy group,

n is 1 to 2;

That is, the crosslinking agent is ionized in an aqueous solution to generate metal ions and hydroxide ions, and the generated hydroxide ions can induce the aqueous solution to have a basicity. In this case, as described above, since the glycosidic bond of the hydrocarbon compound is hydrolyzed by the hydroxide ion, the number of the hydroxyl group sites in the hydrocarbon compound capable of binding to the metal ion can be increased. The crosslinked carbohydrate compound can improve mechanical properties such as compressive strength.

The carbohydrate composition of the present application comprises a carbohydrate compound having a hydroxy group and a compound capable of ionizing in water to emit metal cations and hydroxide ions as a crosslinking agent. When a molded article is manufactured using the composition, Can be provided.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a drawing and a photograph schematically showing a carbohydrate composition according to the present application and a molded article produced thereby.
Fig. 2 is a flowchart showing the production of sawdust pellets according to the manufacturing method of the present application.
3 is a graph comparing compressive strengths of sawdust pellets with and without a cross-linking agent.
4 is a graph comparing the compressive strengths of the sawdust pellets produced in Examples 1 to 12 using calcium oxide (CaO) as a cross-linking agent and the comparative example.
5 is a graph comparing the compressive strengths of the sawdust pellets produced in Examples 13 to 24 using calcium hydroxide (Ca (OH) 2 ) as a crosslinking agent and the comparative example.
6 is a graph comparing compressive strengths of the sawdust pellets produced in Examples 25 to 27 and Comparative Examples.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the scope of the present application is not limited by the following description.

Binder solution preparation

Manufacturing example  One

SP (special grade) sucrose reagent was used, and 50 g of sucrose was added to distilled water and dissolved to finally prepare a binder solution having a volume of 100 ml (50% w / wt).

Manufacturing example  2

SP (special grade) sucrose reagent was used. 65 g of sucrose was added to distilled water and dissolved to finally prepare a binder solution (65% w / wt) having a volume of 100 ml.

Manufacturing example  3

SP (special grade) sucrose reagent was used. 75 g of sucrose was added to distilled water and dissolved to prepare a binder solution having a volume of 100 ml (75% w / wt).

Manufacture of sawdust pellets

Example  One

Sawdust pellets were prepared in the same manner as in Fig.

Specifically, a sawdust-water mixture was prepared by mixing 100 parts by weight of dried sawdust (non-fermented oak wood raw sawdust of hardwood series), which was dried in an oven, with 10 parts by weight of water. To the prepared sawdust-water mixture, a calcium oxide crosslinking agent was added and then 10 parts by weight of the binder solution prepared in Preparation Example 1 was added to prepare a carbohydrate composition. At this time, the molar ratio of the binder solution to the crosslinking agent was 1: 1. The prepared composition was put into a mold having a diameter of 10 mm, and a load with a compression load of 120 MPa was maintained for 30 seconds on a mold to which the composition was introduced by using a hydraulic press having a pressure range of 1000 kg. The mold was then removed and dried at room temperature for 1 day to produce sawdust pellets.

The pH of the carbohydrate composition prepared above was measured with a pH meter at 25 ° C. The results are shown in Table 1.

Example  2 to 24

Sawdust pellets were prepared in the same manner as in Example 1, except that the carbohydrate composition was prepared by mixing the kind of binder solution, the type and content of crosslinking agent, and the molar ratio of sucrose and crosslinking agent according to the compounding ratios shown in Table 1 below.

The pH of the carbohydrate composition prepared above was measured with a pH meter at 25 ° C. The results are shown in Table 1.


Dry sawdust bookbinder
solution
water Cross-linking agent Mole ratio
(Sucrose: crosslinking agent)
pH CaO Ca (OH) 2








room
city
Yes One 100wt% Production Example 1 10wt% 0.8 wt% - 1: 1 11.95 2 100wt% Production Example 1 10wt% 1.6 wt% - 1: 2 12.12 3 100wt% Production Example 1 10wt% 2.4wt% - 1: 3 12.22 4 100wt% Production Example 1 10wt% 3.2wt% - 1: 4 > 12 5 100wt% Production Example 2 10wt% 1.07 wt% - 1: 1 11.93 6 100wt% Production Example 2 10wt% 2.14 wt% - 1: 2 12.03 7 100wt% Production Example 2 10wt% 3.21wt% - 1: 3 12.1 8 100wt% Production Example 2 10wt% 4.28 wt% - 1: 4 > 12 9 100wt% Production Example 3 10wt% 1.23 wt% - 1: 1 11.88 10 100wt% Production Example 3 10wt% 2.46 wt% - 1: 2 12.05 11 100wt% Production Example 3 10wt% 3.69wt% - 1: 3 12.1 12 100wt% Production Example 3 10wt% 4.92 wt% - 1: 4 > 12 13 100wt% Production Example 1 10wt% - 1.08 wt% 1: 1 12.16 14 100wt% Production Example 1 10wt% - 2.17 wt% 1: 2 12.36 15 100wt% Production Example 1 10wt% - 3.28 wt% 1: 3 12.45 16 100wt% Production Example 1 10wt% - 5.64wt% 1: 4 > 12 17 100wt% Production Example 2 10wt% - 1.4wt% 1: 1 12.12 18 100wt% Production Example 2 10wt% - 2.82wt% 1: 2 12.38 19 100wt% Production Example 2 10wt% - 4.23wt% 1: 3 12.53 20 100wt% Production Example 2 10wt% - 5.64wt% 1: 4 > 12 21 100wt% Production Example 3 10wt% - 1.63 wt% 1: 1 12.02 22 100wt% Production Example 3 10wt% - 3.26 wt% 1: 2 13.85 23 100wt% Production Example 3 10wt% - 4.89 wt% 1: 3 14.0 24 100wt% Production Example 3 10wt% - 6.52 wt% 1: 4 > 12

Comparative Example

Sawdust pellets were prepared in the same manner as in Example 1 except that no crosslinking agent was used.

The pH of the carbohydrate composition prepared in the above Comparative Example was measured by a pH meter at 25 캜, and the result was 5.98.

The sawdust pellets produced in Examples 1 to 24 and Comparative Examples were dried at room temperature for one day and cracking strength (compressive strength) was measured using a compressive strength machine. More specifically, a pellet sample was horizontally placed on a flat plate using an INSTRON strength measuring machine (model-3345, 5 kN load cell) and subjected to a load at a constant speed of 10 mm / min. The maximum intensity value was measured, and the measurement results are shown in Figs. 3 to 5. Fig.

3 is a graph comparing compressive strengths of sawdust pellets with and without a cross-linking agent. Specifically, graphs comparing the compressive strengths of sawdust pellets prepared only with dry sawdust (control) and sawdust pellets of comparative examples prepared using only binder solution without adding a crosslinking agent. Referring to FIG. 3, it can be seen that the compressive strength of the sawdust pellet is increased even when only a binder is used as compared with the case where the binder is not used (control group).

4 is a graph comparing the compressive strengths of the sawdust pellets produced in Examples 1 to 12 using calcium oxide (CaO) as a cross-linking agent and the comparative example.

5 is a graph comparing the compressive strengths of the sawdust pellets produced in Examples 13 to 24 using calcium hydroxide (Ca (OH) 2 ) as a crosslinking agent and the comparative example.

As shown in Figs. 4 and 5, the examples using the binder solution and the crosslinking agent showed excellent compressive strengths as compared with the comparative example using only the binder solution.

In particular, referring to FIG. 4, when a binder solution having a sucrose content of 65% or more (Production Example 2) was used, excellent compression strength was exhibited when the molar ratio of sucrose and calcium oxide (CaO) was 1: 3 .

5, when the binder solution having a sucrose content of 65% or more (Production Example 2) is used, when the molar ratio of sucrose and calcium hydroxide (Ca (OH) 2 ) is 1: 2 and 1: 3, And exhibited more excellent compressive strength.

Example  25 to 27

Sawdust pellets were prepared in the same manner as in Example 1, except that the carbohydrate composition was prepared by mixing the kinds of the binder solution, sodium hydroxide (NaOH) and their contents according to the mixing ratios shown in Table 2 below.

Specifically, in Table 2 below, sodium hydroxide (NaOH) was added to crosslink the carbohydrate composition under the same basic conditions (pH 12). The pH of the carbohydrate composition prepared above was measured with a pH meter at 25 ° C. The results are shown in Table 2 below.


 Example 25 26 27 Dry sawdust 100 wt% 100 wt% 100 wt% Binder solution Production Example 1 Production Example 2 Production Example 3 10 wt% 10 wt% 10 wt% water 10 wt% 10 wt% 10 wt% NaOH 1.0 wt% 1.3 wt% 2.0 wt% pH 12.0 12.0 12.0

The sawdust pellets prepared in Examples 25 to 27 and Comparative Examples were dried at room temperature for one day and crack strength was measured using a compressive strength machine. The measurement results are shown in Fig.

As shown in FIG. 6, the sawdust pellets of Examples 25 to 27, which contained crosslinked carbohydrate compounds under basic conditions, exhibited better compressive strength than the sawdust pellets of the comparative example comprising crosslinked carbohydrate compounds under non-basic conditions (pH 5.98) .

Claims (14)

A binder comprising a carbohydrate compound having 4 or more hydroxy groups; And a crosslinking agent represented by the following formula (1):
[Chemical Formula 1]
MX n
M is a monovalent or divalent metal,
X is oxygen or a hydroxy group,
n is 1 to 2; The carbohydrate composition according to claim 1, wherein the molar ratio of the carbohydrate compound to the crosslinking agent represented by formula (1) is 1: 1 or more. The carbohydrate composition according to claim 1, wherein the molar ratio of the carbohydrate compound to the crosslinking agent represented by formula (I) is 1: 2 to 1: 4. The carbohydrate composition according to claim 1, wherein the content of the carbohydrate compound in the binder is 40 parts by weight or more based on 100 parts by weight of the binder. The carbohydrate composition according to claim 1, wherein the content of the carbohydrate compound in the binder is 40 to 90 parts by weight based on 100 parts by weight of the binder. The carbohydrate composition of claim 1, further comprising biomass. 7. The carbohydrate composition according to claim 6, further comprising water, wherein the content of water in the composition is 5 to 30 parts by weight based on 100 parts by weight of the biomass. 8. The carbohydrate composition according to claim 7, wherein the carbohydrate composition is an aqueous solution having a pH of at least 8 measured at 25 < 0 > C. The carbohydrate composition according to claim 1, wherein the carbohydrate compound is at least one saccharide selected from the group consisting of disaccharides, trisaccharides, sugar chains and polysaccharides. 2. The carbohydrate composition according to claim 1, wherein M in formula (1) is sodium, potassium, calcium or magnesium. A binder comprising a carbohydrate compound having 4 or more hydroxy groups; And a crosslinking agent represented by the following formula (1):
[Chemical Formula 1]
MX n
M is a monovalent or divalent metal,
X is oxygen or a hydroxy group,
n is 1 to 2; The molded article according to claim 11, wherein the molar ratio of the carbohydrate compound to the crosslinking agent represented by formula (1) is 1: 2 to 1: 4. A binder containing a carbohydrate compound having at least 4 hydroxy groups, and a crosslinking agent represented by the following formula (1), into a mold and molding the molded product:
[Chemical Formula 1]
MX n
M is a monovalent or divalent metal,
X is oxygen or a hydroxy group,
n is 1 to 2; And crosslinking the carbohydrate compound having 4 or more hydroxy groups under a condition of pH 8 or more.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003300765A (en) * 2002-04-02 2003-10-21 Adomikkusu:Kk Composition for pavement material and production method for pavement material using the composition

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003300765A (en) * 2002-04-02 2003-10-21 Adomikkusu:Kk Composition for pavement material and production method for pavement material using the composition

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