CN111732928A - Method for preparing soybean-based adhesive by adopting soybean meal for feed and application of soybean-based adhesive - Google Patents
Method for preparing soybean-based adhesive by adopting soybean meal for feed and application of soybean-based adhesive Download PDFInfo
- Publication number
- CN111732928A CN111732928A CN202010660201.XA CN202010660201A CN111732928A CN 111732928 A CN111732928 A CN 111732928A CN 202010660201 A CN202010660201 A CN 202010660201A CN 111732928 A CN111732928 A CN 111732928A
- Authority
- CN
- China
- Prior art keywords
- soybean
- soybean meal
- based adhesive
- feed
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C09J177/00—Adhesives based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Adhesives based on derivatives of such polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G11/00—Applying adhesives or glue to surfaces of wood to be joined
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/14—Extraction; Separation; Purification
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/14—Extraction; Separation; Purification
- C07K1/145—Extraction; Separation; Purification by extraction or solubilisation
-
- 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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- 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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2312/00—Crosslinking
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Analytical Chemistry (AREA)
- Biophysics (AREA)
- Biochemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a method for preparing a soybean-based adhesive by adopting soybean meal for feed and application thereof, wherein the soybean meal for feed is used for preparing the soybean-based adhesive, the soybean meal for feed is squeezed at a high temperature of 160-170 ℃, the soybean meal for feed is subjected to alkali modification to ensure that inactive protein renaturation is lost and protein solubility is improved, then a softening agent is added into modified soybean meal powder, finally, polyamide-epichlorohydrin resin and the modified soybean meal powder are adopted to realize crosslinking reaction to generate the soybean-based adhesive, the softening agent is used for improving initial viscosity and fluidity of the soybean-based adhesive, the water resistance and bonding strength of a plywood product using the soybean-based adhesive reach national standards, and the production cost of the soybean-based adhesive is effectively reduced on the premise of meeting the water resistance and bonding performance.
Description
Technical Field
The invention relates to the field of artificial board adhesive preparation, in particular to a method for preparing a soybean-based adhesive by adopting soybean meal for feed and application of the soybean-based adhesive.
Background
The soybean-based adhesive technology applied to the market at present is generally a two-component soybean-based adhesive blending technology, powder is soybean protein powder, a liquid modified crosslinking agent is a polyamide solution, and the powder and the liquid are mixed and stirred uniformly according to a certain proportion and then are used. The soybean protein powder is mainly processed from a byproduct of soybean meal after oil extraction of soybean, and can be divided into soybean meal for feed and edible soybean meal according to the application of the soybean meal. The two squeezing processes are different, the soybean meal for the feed is obtained by adopting a high-temperature squeezing method, and the edible soybean meal is obtained by adopting a low-temperature squeezing method.
The powder adopted by the soybean-based adhesive in the market at present is low-temperature defatted soybean powder further processed by adopting edible soybean meal, the main reason is that the edible soybean meal is prepared by a low-temperature squeezing mode, soybean protein keeps higher activity, the solubility of KOH water-soluble protein is higher, and when the KOH low-soluble soybean meal is used for preparing the soybean-based adhesive, the initial viscosity and the gluing performance of the soybean-based adhesive can well meet the use requirements. However, the edible soybean meal is high in price, and the price of the edible soybean meal is more than 2 times higher than that of the soybean meal for feeds. Although the soybean meal for the feed is low in price, the soybean meal for the feed is mainly prepared by a high-temperature squeezing method, and the high-temperature soybean meal protein powder obtained by further processing can deform protein, so that the protein is seriously inactivated and denatured, and cannot be used for preparing the soybean-based adhesive.
Disclosure of Invention
The invention aims to provide a method for preparing a soybean-based adhesive by adopting soybean meal for feed and application thereof.
On one hand, the invention provides a method for preparing a soybean-based adhesive by adopting soybean meal for feed, the soybean-based adhesive is prepared by mixing the soybean meal and a crosslinking agent, the soybean meal is the soybean meal for feed which is prepared by squeezing at the temperature of 160-170 ℃, the crosslinking agent adopts polyamide-epichlorohydrin resin, and the method is prepared by the following steps:
step 1: taking 100 parts by weight of soybean meal for feed, adding 5-10 parts by weight of sodium sulfite or methyl cellulose serving as an alkali modifier, and stirring and mixing in a mixer for 100-200 s;
step 2: grinding the soybean meal by using a grinder at the grinding temperature of 40-55 ℃, and screening 100-200 meshes of soybean meal powder;
and step 3: taking 100 parts by weight of soybean meal powder, adding 0-20 parts by weight of softening agent flour or kaolin, and stirring to obtain modified soybean meal powder;
and 4, step 4: and (2) taking 100 parts by weight of polyamide-epichlorohydrin resin and 30-50 parts by weight of modified soybean meal, stirring and mixing to realize a crosslinking reaction, thereby obtaining the soybean-based adhesive.
The present invention is not particularly limited in terms of the source of all raw materials, and is commercially available.
The soybean-based adhesive is prepared from the low-cost soybean meal for the feed, the soybean meal for the feed is commercially available, and the protein is squeezed at the high temperature of 160-170 ℃, so that the protein is deformed, and the protein is inactivated and denatured.
Preferably, the water content of the soybean meal for the feed is 10% -12%. Specifically, the content may be 10% or 12%.
Preferably, the solubility of the water-soluble protein of the soybean meal for the feed is 60-75%. Specifically, it may be 60%, 65%, 70% or 75%.
Preferably, the sodium sulfite is industrial sodium sulfite. Preferably, the alkali modifier can also consist of one or more of potassium hydroxide, magnesium hydroxide, potassium sulfite, sodium nitrite, potassium bisulfite, hydroxymethyl cellulose, carboxymethyl cellulose and sodium hydroxymethyl cellulose. The content of the sodium sulfite and the methyl cellulose is 5-10 parts by weight, and specifically 5 parts by weight or 10 parts by weight. The invention modifies soybean meal for feed by an alkali modifier to renature the inactivated and denatured protein. Wherein, protein renaturation means that the protein can be restored to the natural conformation and biological activity under the proper condition. It is believed that intermolecular hydrophobic interactions are an important factor causing protein aggregation, and therefore, the present invention may be to gradually fold a denatured protein from an extended state into a physiologically active native protein by an intramolecular action by exposing hydrophobic groups on the surface of the denatured soybean protein through alkali modification. In the invention, at normal temperature, the soybean meal for the feed and the alkali modifier are stirred and mixed for 100-200 s by a mixer, and at the moment, the two components of the soybean meal for the feed and the alkali modifier are blended with each other and are uniformly mixed, namely physical mixing. Specifically, the time can be 100s, 150s and 200 s.
In the invention, the crushing temperature is 40-55 ℃, the temperature is not too high when the flour is milled by adjusting the power of the flour mill, and the alkali modifier can effectively activate the activity of the protein in the soybean meal for the feed at the temperature. The specific temperature can be 40 deg.C, 45 deg.C, 50 deg.C, and 55 deg.C.
The soybean meal is crushed, ground and screened to obtain the soybean meal powder with proper particle size, if the mesh number is too low, the use requirement cannot be met, and the soybean meal powder mainly shows that the soybean meal powder has high viscosity and cannot be gelatinized when being used for producing a soybean-based adhesive. Therefore, the screening mesh number of the soybean meal is 100-200 meshes, and specifically can be 100 meshes, 150 meshes and 200 meshes.
Preferably, the water content of the ground and screened soybean meal is 7-8%. Specifically, it may be 7% or 8%.
Preferably, the softening agent can also be one or more of bentonite, talcum powder and heavy calcium carbonate. The talcum powder is prepared by crushing magnesium silicate minerals, then treating by using hydrochloric acid, washing by water and drying, has uniform granularity and strong dispersibility, and is commonly used as a reinforcing modification softener for rubber, plastics, paint and the like; ground calcium carbonate is obtained by grinding natural carbonate minerals such as calcite and marble first-grade limestone, and is a commonly used powdery inorganic softening agent. The softening agent is an auxiliary agent capable of improving the processing performance and the use performance of the soybean-based adhesive, and can reduce the viscosity of the rubber material and the temperature during mixing, improve the dispersibility and the mixing performance of the rubber material, improve the initial viscosity and the fluidity of the soybean-based adhesive and improve the bonding strength of the soybean-based adhesive. According to the invention, the softening agent is added into the soybean meal, so that the mutual permeation of the soybean meal and the polyamide-epichlorohydrin resin is promoted, and the soybean-based adhesive can be softened, so that the initial viscosity and the fluidity of the soybean-based adhesive are improved. Preferably kaolin, talc, kaolin/flour, more preferably kaolin/flour.
Preferably, the particle size of the softening agent is 100-200 meshes. The particle size is consistent with that of soybean meal powder, and the dispersion is convenient and uniform. Specifically, the mesh size can be 100 meshes, 150 meshes and 200 meshes.
According to the invention, 0-20 parts by weight of softening agent is added into the soybean meal powder, too much softening agent is added, the viscosity and the strength of the prepared soybean-based adhesive are low, too little softening agent is added, and the viscosity and the strength of the prepared soybean-based adhesive are high. Specifically, the amount of the surfactant may be 0 part by weight, 10 parts by weight or 20 parts by weight.
Preferably, in the step 3, the stirring time of the soybean meal powder and the softening agent is 10-15 min. Specifically, it can be 10min and 15 min.
In another aspect, the present invention provides the use of a soy-based adhesive, comprising the steps of:
1. preparing a three-layer plywood by using veneers with the thickness of 2mm, and drying the veneers in advance until the water content is 5-8%;
2. at 350g/m2Uniformly coating the prepared soybean-based adhesive on a single board surface according to the adhesive coating amount (double surfaces), assembling the single boards in a manner that the fiber directions of the adjacent single boards are perpendicular to each other, and aging the single boards for 20min at room temperature after assembling;
3. prepressing for 15min under the pressure of 1.5MPa, then arranging baffle plates on the peripheral sides of the blanks, and carrying out steam hot pressing: the pressure is 2.5MPa, the temperature is 130 ℃, and the time is 2min, thus forming the three-layer plywood. Enclose the fender to four sides of base, can prevent like this that steam is excessive, make steam continuously be detained in the baffle, guarantee to carry out steam hot pressing to the base under certain closed environment, can not only make soybean base gluing agent homodisperse, guarantee the uniformity of unit area bonding strength, the osmotic pressure of steam effectively improves bonding strength moreover.
Preferably, the veneer is birch. The birch is commonly used for furniture manufacture, and has the advantages of high elasticity, good processability, smooth cut surface and good gluing performance.
The invention has the beneficial effects that: the invention adopts soybean meal for feed to prepare a soybean-based adhesive, the soybean meal for feed is subjected to high-temperature squeezing at 160-170 ℃, the protein of the soybean meal is inactivated, firstly, alkali modification is carried out on the soybean meal for feed, the inactive protein renaturation is realized, the protein solubility is improved, then, a softening agent is added into the modified soybean meal, finally, polyamide-epichlorohydrin resin and the modified soybean meal are adopted to realize crosslinking reaction to generate the soybean-based adhesive, the softening agent is used for improving the initial viscosity and the fluidity of the soybean-based adhesive, the polyamide-epichlorohydrin resin has a large amount of hydrophilic group amino (-NH 2), a crosslinking structure can be formed with groups in the soybean protein, the number of hydrophilic groups of the soybean protein is reduced, the water resistance and the bonding strength of a plywood product using the soybean-based adhesive both reach the national standard, and the soybean meal for feed with low cost is adopted, on the premise of meeting the water resistance and the bonding performance, the production cost of the soybean-based adhesive is effectively reduced.
Detailed Description
The present invention will be further described with reference to the structures or terms used herein. The description is given for the sake of example only, to illustrate how the invention may be implemented, and does not constitute any limitation on the invention.
Example 1
100 parts by weight of feed soybean meal with the water content of 10% and the solubility of water-soluble protein of 70% and 5 parts by weight of industrial sodium sulfite are obtained and mixed for 100 seconds by a mixer at normal temperature. The soybean meal is ground in a grading grinder at the grinding temperature of 40 ℃. The 100-mesh soybean meal powder is screened by a grading mill, and the water content is 7%. And taking 100 parts of soybean meal powder, adding 20 parts of kaolin with the particle size of 100 meshes, and stirring and mixing for 10min in a mixer to obtain the modified soybean meal powder. And (3) stirring and mixing 100 parts of polyamide-epichlorohydrin resin and 30 parts of modified soybean meal powder to obtain the soybean-based adhesive.
Table 1 shows the KOH water-soluble protein solubilities of the modified soybean meal for feed, the edible soybean meal, and the soybean meal for feed in example 1.
TABLE 1 comparison of solubilities of three KOH-solubilized proteins from soybean meal
The solubility of KOH-soluble protein can reflect the denaturation of protein, and the larger the denaturation of protein, the smaller the solubility of KOH-soluble protein. As can be seen from Table 1, the solubility of KOH-soluble protein in edible soybean meal is not less than 85%, and the solubility of KOH-soluble protein in feed soybean meal is not more than 75%, indicating that the degree of protein denaturation of the feed soybean meal which is not subjected to modification treatment is higher than that of the edible soybean meal. After the feed is modified by the soybean meal, the solubility of KOH water-soluble protein reaches 88.16%, which shows that the protein denaturation degree of the soybean meal for the modified feed is low, and the modification treatment is favorable for protein renaturation.
Table 2 shows the comparison of the parameters of the edible soybean meal, the soybean meal for feed and the soybean meal for modified feed in example 1. Urease activity was determined according to the urease activity in the feed soybean product of GB/T8622-2006. The crude protein content is determined by calculating the content of the crude protein of the grains and the beans according to GB/T5511-2008.
TABLE 2 comparison of parameters of edible soybean meal, soybean meal for feeds, and soybean meal for modified feeds
The nitrogen solubility index is an index for measuring the functional performance of food protein, and is the percentage of the nitrogen content of the protein which can be dissolved in water in the total nitrogen content of the protein, and the larger the denaturation degree of the protein is, the smaller the nitrogen solubility index is. The urease activity is close to the content of antitrypsin, the denaturation degree of the antitrypsin after being inactivated by heat is similar to that of the antitrypsin, and the determination is easy, so the urease activity index is commonly used for judging the heating degree of the soybean meal and estimating whether the antitrypsin in the soybean meal is damaged or not, if the urease activity is low, the soybean meal is seriously heated, the antitrypsin in the soybean meal is inactivated, and the protein is denatured. According to table 2, the nitrogen solubility index of the soybean meal for feed is lower than that of the edible soybean meal, and the nitrogen solubility index and urease activity of the soybean meal for feed are both lower than that of the edible soybean meal, which indicates that the heating temperature of the soybean meal for feed is too high and the protein denaturation is serious. After the soybean meal for the feed is modified, the nitrogen solubility index and the urease activity of the soybean meal for the feed are both improved and are far higher than the nitrogen solubility index and the urease activity of the soybean meal for the feed, even higher than the nitrogen solubility index and the urease activity of the soybean meal for the feed, which indicates that the protein activity of the soybean meal for the feed is recovered.
Example 2
100 parts by weight of feed soybean meal with the water content of 10% and the solubility of water-soluble protein of 70% and 5 parts by weight of industrial sodium sulfite are obtained, and the mixture is stirred and mixed for 100 seconds by a mixer at normal temperature. The soybean meal is ground in a grading grinder at the grinding temperature of 40 ℃. The 100-mesh soybean meal powder is screened by a grading mill, and the water content is 7%. Taking 100 parts by weight of soybean meal powder, adding 15 parts by weight of kaolin with the particle size of 100 meshes, and stirring and mixing for 10min in a mixer to obtain the modified soybean meal powder. And (3) stirring and mixing 100 parts by weight of polyamide-epichlorohydrin resin and 30 parts by weight of modified soybean meal powder to obtain the soybean-based adhesive.
Example 3
100 parts by weight of feed soybean meal with the water content of 10% and the solubility of water-soluble protein of 70% and 5 parts by weight of industrial sodium sulfite are obtained, and the mixture is stirred and mixed for 100 seconds by a mixer at normal temperature. The soybean meal is ground in a grading grinder at the grinding temperature of 40 ℃. 100-mesh soybean meal powder is screened by a grading mill, and the water content of the soybean meal powder is 7%. Taking 100 parts of soybean meal powder, adding 10 parts of kaolin with the particle size of 100 meshes by weight, and stirring and mixing for 10min in a mixer to obtain the modified soybean meal powder. And (3) stirring and mixing 100 parts by weight of polyamide-epichlorohydrin resin and 30 parts by weight of modified soybean meal powder to obtain the soybean-based adhesive.
Example 4
100 parts by weight of feed soybean meal with the water content of 12% and the solubility of water-soluble protein of 60% and 5 parts by weight of methyl cellulose are obtained, and the mixture is stirred and mixed for 150 seconds by a mixer at normal temperature. The soybean meal is ground in a grading grinder at the grinding temperature of 45 ℃. The soybean meal powder of 150 meshes is screened by a grading mill, and the water content is 8 percent. Taking 100 parts by weight of soybean meal powder, adding 10 parts by weight of talcum powder with the particle size of 150 meshes, and stirring and mixing for 10min in a mixer to obtain the modified soybean meal powder. And (3) stirring and mixing 100 parts by weight of polyamide-epichlorohydrin resin and 30 parts by weight of modified soybean meal powder to obtain the soybean-based adhesive.
Example 5
100 parts by weight of feed soybean meal with the water content of 12% and the solubility of water-soluble protein of 65% and 10 parts by weight of methyl cellulose are obtained, and the mixture is stirred and mixed for 200s at normal temperature by a mixer. The soybean meal is ground in a grading grinder at the grinding temperature of 50 ℃. 200-mesh soybean meal powder is screened by a grading mill, and the water content of the soybean meal powder is 8%. And adding 10 parts by weight of kaolin/flour with the particle size of 200 meshes into 100 parts by weight of soybean meal powder, and stirring and mixing for 15min in a mixer to obtain the modified soybean meal powder. And (3) stirring and mixing 100 parts of polyamide-epichlorohydrin resin and 30 parts of modified soybean meal powder by weight to obtain the soybean-based adhesive.
Example 6
100 parts by weight of feed soybean meal with the water content of 12% and the solubility of water-soluble protein of 75% and 10 parts by weight of methyl cellulose are obtained and mixed for 200s by a mixing machine at normal temperature. The soybean meal is ground in a grading grinder at the grinding temperature of 55 ℃. The 200-mesh soybean meal powder is screened by a grading mill, and the water content is 8%. 0 part by weight of a softening agent was added to the soybean meal. And (3) stirring and mixing 100 parts by weight of polyamide-epichlorohydrin resin and 30 parts by weight of soybean meal powder to obtain the soybean-based adhesive.
The soy-based adhesives prepared in examples 1-6 were used to press three-ply plywood using the following process parameters:
preparing a three-layer plywood by using birch veneers with the thickness of 2mm, and drying the birch veneers in advance until the water content is 5-8%. At 350g/m2The prepared soybean-based adhesive is uniformly coated on birch veneers according to the glue coating amount (double surfaces), the veneers are assembled in a way that the fiber directions of the adjacent veneers are mutually perpendicular, and the assembly is aged for 20min at room temperature. Prepressing for 15min under the pressure of 1.5MPa, then arranging baffle plates on the peripheral sides of the blanks, and carrying out steam hot pressing: the pressure is 2.5MPa, the temperature is 130 ℃, and the time is 2min, thus forming the three-layer plywood. The bonding strength was measured after 24h at room temperature.
Three-ply plywood was prepared according to the above procedure and the wet bond strength of the plywood was determined according to the method described in GB/T9846.3-2004 for type II panels.
Table 3 shows the effect of different softeners on viscosity, maximum coat weight and wet bond strength of the soy-based adhesive.
TABLE 3 Effect of different softeners on the Performance of Soybean-based Adhesives
| Species of | Adding amount of softening agent (per 100 parts of soybean meal powder) | Viscosity mPa.s | Maximum glue coating amount g/m2 | Wet strength/MPa |
| Example 1 (Kaolinitum) | 20 | 5.8×104 | 270±10 | 1.32 |
| Example 2 (Kaolinitum) | 15 | 5.7×104 | 260±10 | 1.30 |
| Example 3 (Kaolinitum) | 10 | 5.2×104 | 250±10 | 1.25 |
| Example 4 (Talc powder) | 10 | 5.6×104 | 250±10 | 1.28 |
| Example 5 (Kaolinitum/flour) | 10 | 3.8×104 | 280±10 | 1.35 |
| Example 6 | 0 | 7.5×104 | 210±10 | 1.16 |
According to the table 2, the difference between the example 1, the example 2 and the example 3 is that the kaolin part is 20 parts in the example 1, 15 parts in the example 2 and 10 parts in the example 3 per 100 parts of soybean meal, and the viscosity of the soybean-based adhesive is 5.7 × 10 when the kaolin part is 20 parts under the same softener4mPa.s, maximum glue coating amount of 270 +/-10 g/m2And when the wet strength reaches 1.32 MPa and is larger than 15 parts and 10 parts of kaolin, the viscosity, the maximum gluing amount and the wet strength of the soybean-based adhesive are increased along with the increase of the parts when the softening agent is the kaolin.
According to Table 2, the additives of examples 3, 4, 5 and 6The softening agent is kaolin, talcum powder, kaolin/flour and no softening agent, and the viscosity of the soybean-based adhesive is as high as 7.5 × 10 without adding the softening agent4mPa.s, too high viscosity, poor initial viscosity and fluidity, and low maximum gum content. After kaolin, talcum powder and kaolin/flour are added, the viscosity of the soybean-based adhesive is reduced, and the initial viscosity and the fluidity are improved. Particularly, under the condition of the kaolin/flour mixed softener, the viscosity of the soybean-based adhesive is proper, the fluidity is optimal, the phenomenon of agglomeration is avoided in the pouring process, and the maximum gluing amount of the soybean-based adhesive reaches 280 +/-10 g/m due to the addition of the kaolin/flour mixed softener2The bonding strength reaches 1.35 MPa, and the water resistance is excellent.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but rather by the equivalents thereof as may occur to those skilled in the art upon consideration of the present inventive concept.
Claims (8)
1. The method for preparing the soybean-based adhesive by adopting the soybean meal for the feed is characterized in that the soybean-based adhesive is prepared by mixing the soybean meal and a crosslinking agent, the soybean meal is the soybean meal for the feed which is prepared by squeezing at the temperature of 160-170 ℃, the crosslinking agent adopts polyamide-epichlorohydrin resin, and the method is prepared by the following steps:
step 1: taking 100 parts by weight of soybean meal for feed, adding 5-10 parts by weight of sodium sulfite or methyl cellulose serving as an alkali modifier, and stirring and mixing in a mixer for 100-200 s;
step 2: grinding the soybean meal by using a grinder at the grinding temperature of 40-55 ℃, and screening 100-200 meshes of soybean meal powder;
and step 3: taking 100 parts by weight of soybean meal powder, adding 0-20 parts by weight of softening agent flour or kaolin, and stirring to obtain modified soybean meal powder;
and 4, step 4: and (2) taking 100 parts by weight of polyamide-epichlorohydrin resin and 30-50 parts by weight of modified soybean meal, stirring and mixing to realize a crosslinking reaction, thereby obtaining the soybean-based adhesive.
2. The method of claim 1, wherein the water content of the soybean meal for feed is 10% to 12%.
3. The method of claim 2, wherein the feed soybean meal has a water soluble protein solubility of 60% to 75%.
4. The method of claim 1, wherein the sodium sulfite is industrial sodium sulfite.
5. The method according to claim 1, characterized in that the ground and screened soybean meal has a water content of 7-8%.
6. The method of claim 1, wherein the size of the softener is 100 to 200 mesh.
7. The method as claimed in claim 7, wherein the stirring and mixing time of the soybean meal and the softening agent is 10-15 min.
8. The application of the soybean-based adhesive of any one of claims 1 to 7 to the preparation of plywood is characterized by comprising the following steps:
1. preparing a three-layer plywood by using veneers with the thickness of 2mm, and drying the veneers in advance until the water content is 5-8%;
2. at 350g/m2Uniformly coating the soybean-based adhesive on the surface of a single plate, assembling the single plate in a manner that the fiber directions of the adjacent single plates form a right angle with each other, and aging the single plate at room temperature for 20min after assembling;
3. prepressing for 15min under the pressure of 1.5MPa, then arranging baffle plates on the peripheral sides of the blanks, and carrying out steam hot pressing: the pressure is 2.5MPa, the temperature is 130 ℃, and the time is 2min, thus forming the three-layer plywood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010660201.XA CN111732928A (en) | 2020-07-10 | 2020-07-10 | Method for preparing soybean-based adhesive by adopting soybean meal for feed and application of soybean-based adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010660201.XA CN111732928A (en) | 2020-07-10 | 2020-07-10 | Method for preparing soybean-based adhesive by adopting soybean meal for feed and application of soybean-based adhesive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111732928A true CN111732928A (en) | 2020-10-02 |
Family
ID=72655900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010660201.XA Pending CN111732928A (en) | 2020-07-10 | 2020-07-10 | Method for preparing soybean-based adhesive by adopting soybean meal for feed and application of soybean-based adhesive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111732928A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163973A (en) * | 2021-12-15 | 2022-03-11 | 浙江升华云峰新材股份有限公司 | Aldehyde-free adhesive and preparation method and application thereof |
| CN114800746A (en) * | 2022-05-13 | 2022-07-29 | 淮阴师范学院 | Method for preparing fiberboard by using coriolus versicolor |
| CN115433543A (en) * | 2022-09-01 | 2022-12-06 | 浙江升华云峰新材股份有限公司 | Soybean meal adhesive and preparation method of ecological plate |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040089418A1 (en) * | 2002-05-13 | 2004-05-13 | State Board Of Higher Education On Behalf Of Oregon State University | Formaldehyde-free lignocellulosic adhesives and composites made from the adhesives |
| US20050166796A1 (en) * | 2003-12-31 | 2005-08-04 | Sun Xiuzhi S. | Adhesives from modified soy protein |
| WO2007139501A1 (en) * | 2006-06-01 | 2007-12-06 | Akzo Nobel Coatings International B.V. | Adhesive system |
| US20080021187A1 (en) * | 2006-07-18 | 2008-01-24 | Wescott James M | Stable Adhesives From Urea-Denatured Soy Flour |
| CN101558101A (en) * | 2006-08-24 | 2009-10-14 | 赫尔克里士公司 | Adhesive composition of low molecular weight polyaminopolyamide-epichlorohydrin (PAE) resin and protein |
| CN102149765A (en) * | 2008-07-03 | 2011-08-10 | 嘉吉公司 | Protein and starch compositions, methods for making and uses thereof |
| CN102959017A (en) * | 2010-05-26 | 2013-03-06 | 赫尔克里士公司 | Protein adhesive formulations with amine-epichlorohydrin and isocyanate additives |
| CN104610909A (en) * | 2015-02-26 | 2015-05-13 | 许丽萍 | Aldehyde-free vegetable protein-based wood adhesive as well as preparation and application methods thereof |
| CN110760287A (en) * | 2019-10-31 | 2020-02-07 | 南京理工大学 | Method for preparing soybean protein powder for wood industry by using high-temperature soybean meal |
| CN110835518A (en) * | 2019-11-27 | 2020-02-25 | 中国林业科学研究院木材工业研究所 | Formaldehyde-free soybean protein powder adhesive and preparation method and application thereof |
-
2020
- 2020-07-10 CN CN202010660201.XA patent/CN111732928A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040089418A1 (en) * | 2002-05-13 | 2004-05-13 | State Board Of Higher Education On Behalf Of Oregon State University | Formaldehyde-free lignocellulosic adhesives and composites made from the adhesives |
| US20050166796A1 (en) * | 2003-12-31 | 2005-08-04 | Sun Xiuzhi S. | Adhesives from modified soy protein |
| WO2007139501A1 (en) * | 2006-06-01 | 2007-12-06 | Akzo Nobel Coatings International B.V. | Adhesive system |
| US20080021187A1 (en) * | 2006-07-18 | 2008-01-24 | Wescott James M | Stable Adhesives From Urea-Denatured Soy Flour |
| CN101558101A (en) * | 2006-08-24 | 2009-10-14 | 赫尔克里士公司 | Adhesive composition of low molecular weight polyaminopolyamide-epichlorohydrin (PAE) resin and protein |
| CN102149765A (en) * | 2008-07-03 | 2011-08-10 | 嘉吉公司 | Protein and starch compositions, methods for making and uses thereof |
| CN102959017A (en) * | 2010-05-26 | 2013-03-06 | 赫尔克里士公司 | Protein adhesive formulations with amine-epichlorohydrin and isocyanate additives |
| CN104610909A (en) * | 2015-02-26 | 2015-05-13 | 许丽萍 | Aldehyde-free vegetable protein-based wood adhesive as well as preparation and application methods thereof |
| CN110760287A (en) * | 2019-10-31 | 2020-02-07 | 南京理工大学 | Method for preparing soybean protein powder for wood industry by using high-temperature soybean meal |
| CN110835518A (en) * | 2019-11-27 | 2020-02-25 | 中国林业科学研究院木材工业研究所 | Formaldehyde-free soybean protein powder adhesive and preparation method and application thereof |
Non-Patent Citations (6)
| Title |
|---|
| 余秀娟 等: "体外蛋白质复性方法及小分子添加剂在复性过程中的作用", 《河北北方学院院报》 * |
| 刘培楠 等: "《基础分子生物学》", 31 May 1983, 高等教育出版社 * |
| 吴梧桐: "《生物制药工艺学》", 28 February 2006, 中国医药科技出版社 * |
| 张冰寒 等: "亚硫酸钠辅助热改性对大豆蛋白胶黏剂结构与性能的影响", 《2016中国国际粘接技术大会 工程科技Ⅰ辑》 * |
| 张向宇: "《实用化学手册》", 30 April 1986, 国防工业出版社 * |
| 郝利平 等: "《食品添加剂》", 31 July 2016, 中国农业大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114163973A (en) * | 2021-12-15 | 2022-03-11 | 浙江升华云峰新材股份有限公司 | Aldehyde-free adhesive and preparation method and application thereof |
| CN114800746A (en) * | 2022-05-13 | 2022-07-29 | 淮阴师范学院 | Method for preparing fiberboard by using coriolus versicolor |
| CN115433543A (en) * | 2022-09-01 | 2022-12-06 | 浙江升华云峰新材股份有限公司 | Soybean meal adhesive and preparation method of ecological plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111732928A (en) | Method for preparing soybean-based adhesive by adopting soybean meal for feed and application of soybean-based adhesive | |
| Bacigalupe et al. | Soy protein adhesives for particleboard production–a review | |
| CN101314235B (en) | Aqueous macromolecule-isocyanic ester stalk artificial board and preparation thereof | |
| US10961421B2 (en) | Wood adhesive compositions comprising proteins and poly (glycidyl ether), and uses thereof | |
| CN110205090B (en) | Preparation method of bio-based soybean protein adhesive based on ultrahigh pressure modification | |
| US10273388B1 (en) | Composite wood adhesive | |
| CN110894422B (en) | Soybean meal adhesive and preparation method thereof | |
| CN107363964A (en) | One kind is without aldehyde environmental protection particieboard and its manufacture method | |
| WO2013112445A1 (en) | Method for the preparation of wood composite from soy flour | |
| CN104497964B (en) | Fibre board use is without aldehyde defatted soy flour base adhesive and preparation method thereof | |
| CN102344764B (en) | Silicon-magnesium composite clay adhesive filling material and application thereof | |
| US8293821B1 (en) | Composite wood adhesive | |
| AU2012275228A1 (en) | Adhesive additive | |
| CN109504343B (en) | Formaldehyde-free bean gum and preparation method thereof | |
| Xu et al. | Research progress of soybean protein adhesive: a review | |
| Qi et al. | Adhesion properties of soy protein subunits and protein adhesive modification | |
| KR20180118165A (en) | Improved composite board manufacturing method | |
| CN108822793B (en) | Preparation method of soybean protein-based formaldehyde-free adhesive | |
| CN110076860A (en) | A kind of preparation of dregs of beans adhesive modifying agent and its application on glued board | |
| US3336246A (en) | Paper laminating adhesive compositions containing resorcinol | |
| CN108727849A (en) | A kind of water-resistant type plant fiber tableware | |
| CN104762026B (en) | Multi-plywood Lauxite filler and preparation method thereof | |
| Hojilla-Evangelista et al. | Evaluation of sorghum flour as extender in plywood adhesives for sprayline coaters or foam extrusion | |
| CN103952118A (en) | Modified soybean protein adhesive and preparation method thereof | |
| CN106753063A (en) | Water resistance wheat flour adhesive and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201002 |
|
| RJ01 | Rejection of invention patent application after publication |