Efficient synthesis method in preparation process of soybean adhesive
By optimizing the preparation process of soybean protein, the problem of unstable adhesion and adhesive performance of soybean adhesives and limited application range, and achieve efficient and low -cost soybean adhesive preparation, and enhance their adhesive properties and stability.
Patent Information
- Application Number
- CN202411018769.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-01-28
AI Technical Summary
The existing soybean adhesive preparation technology has problems such as unstable adhesive properties and complex molecular structure, resulting in limited application range.
By optimizing the preparation process of soy protein, including the control of the enzymatic disintegration conditions, the addition of the modified agent, and the selection of the concentrated drying method, the soybean adhesives with efficient glue properties are prepared.
The efficient synthesis of soybean adhesives has been achieved, the production cost is reduced, the production efficiency is improved, the adhesive performance and stability are enhanced, and the scope of its application is expanded.
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Abstract
Description
Technical Field
[0001] The invention relates to the technical field of preparation and application of soybean protein adhesives, in particular to a high-efficiency synthesis method in the preparation process of soybean adhesives. Background Art
[0002] In the adhesive industry, traditional adhesive products are mostly made from petrochemical products. These products not only cause environmental pollution during use, but their costs are also rising as oil resources become increasingly depleted. Therefore, finding an environmentally friendly, renewable and low-cost adhesive substitute has become an urgent need for the development of the industry.
[0003] As a rich renewable resource, soybean contains a large amount of protein and other nutrients, which have potential adhesive properties. By extracting protein from soybeans and performing appropriate modification and processing, soybean adhesives with excellent adhesive properties can be prepared. This adhesive is not only environmentally friendly, but also has a wide range of raw material sources and relatively low cost.
[0004] However, there are still some problems in the current preparation technology of soybean adhesives. On the one hand, the adhesive properties of soybean protein are not stable and are easily affected by environmental factors such as temperature and humidity. On the other hand, the molecular structure of soybean protein is relatively complex and requires effective modification and optimization to improve its adhesive properties and application range.
[0005] Therefore, it is of great theoretical significance and practical value to study and develop a method for preparing soybean adhesive that can fully utilize the adhesive properties of soybean protein while improving its stability and application range. Summary of the invention
[0006] Technical issues solved
[0007] In view of the above-mentioned shortcomings of the prior art, the present invention provides an efficient synthesis method in the preparation process of soybean adhesive, which can prepare adhesive by using soybean as raw material. Compared with traditional adhesives, soybean adhesive has a wide range of raw material sources and relatively low prices, so it has cost advantages. At the same time, by optimizing the preparation process, such as the control of enzymatic hydrolysis conditions, the selection of concentration and drying methods, etc., the production cost is further reduced, the production efficiency is improved, the effective utilization of renewable resources is achieved, and the dependence on non-renewable resources such as petroleum is reduced, which helps to reduce carbon emissions in the production process and promote green and sustainable development.
[0008] Technical Solution
[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions:
[0010] In the first aspect, an efficient synthesis method in the preparation process of a soybean adhesive comprises the following raw materials in parts by weight: soybean protein: 60%-80%; modifier: a mixture of one or more selected from urea, acrylamide, and polyvinyl alcohol, added in an amount of 5%-15% of the weight of the soybean protein; enzyme: a mixture of one or more selected from alkaline protease, trypsin, and papain, added in an amount of 1%-5% of the weight of the soybean protein; water: used for soaking and grinding soybeans, as well as for subsequent concentration treatment, and its amount is determined according to the actual needs in the preparation process.
[0011] In a second aspect, a method for preparing a soybean adhesive by an efficient synthesis method is provided, characterized in that the method comprises the following specific steps:
[0012] (1): Soybean pretreatment, selecting high-quality soybeans, and obtaining soybean pulp through pretreatment steps such as crushing, soaking, and grinding, wherein the crushing step is to crush the soybeans into fine particles to ensure the smooth progress of the subsequent steps, the soaking step is to soak the crushed soybeans in an appropriate amount of water to allow the soybeans to fully absorb water and swell, and the grinding step is to grind the soaked soybeans into fine soybean pulp using a colloid mill or a ball mill. The ground soybean pulp should have no obvious granularity and a fineness of less than 100 microns;
[0013] (2): Adding a modifier: add an appropriate amount of modifier to the soybean slurry and mix it evenly by stirring. The amount of modifier added should be determined according to the amount of soybean slurry and the required adhesive properties. Generally, the modifier accounts for 1%-5% of the mass of soybean slurry. The modifier can be selected from one or more mixtures of urea, acrylamide, and polyvinyl alcohol;
[0014] (3): Enzymatic hydrolysis treatment, wherein the mixed soybean slurry is subjected to enzymatic hydrolysis treatment. The type and amount of enzyme added have an important influence on the performance of the final product. The type of enzyme may be alkaline protease, trypsin, or papain;
[0015] (4): Concentration treatment: Concentrate the colloid after enzymatic hydrolysis to remove excess water. The concentration treatment can be carried out by vacuum concentration or membrane concentration method. The water content of the colloid after concentration should be controlled between 20% and 40%;
[0016] (5): Drying and crushing: The concentrated colloid is dried. The drying method can be spray drying, vacuum drying or hot air drying. The moisture content of the dried colloid should be less than 10%. Subsequently, the dried colloid is crushed by a crusher to obtain a soybean adhesive product with uniform particle size. The particle size is generally controlled between 80-200 mesh.
[0017] Furthermore, the particle size of the crushed soybeans in the crushing step of the soybean pretreatment should be controlled between 80-120 meshes, the soaking time in the soaking step of the soybean pretreatment is generally 4-6 hours, and the mass ratio of water to soybeans is controlled between 2:1 and 3:1.
[0018] Furthermore, the amount of enzyme added in the enzymatic hydrolysis treatment generally accounts for 0.1%-0.5% of the mass of the soybean milk, the enzymatic hydrolysis conditions include temperature controlled at 40-60°C, pH value controlled at 7.0-9.0, and enzymatic hydrolysis time generally 1-3 hours.
[0019] Furthermore, in the pretreatment step, the crushing step is carried out using a high-speed mixer or a hammer crusher to obtain fine-grained soybean particles, the soaking step uses an appropriate amount of water to allow the soybeans to fully absorb water and swell, and the grinding step uses a colloid mill or a ball mill to obtain fine and uniform soybean slurry.
[0020] Furthermore, the modifier is a substance that can increase the cross-linking degree of soybean protein, including but not limited to urea, acrylamide and polyvinyl alcohol, which can chemically react with soybean protein to improve the adhesive properties of the adhesive.
[0021] Furthermore, in the enzymatic treatment step, the types of enzymes used include but are not limited to single enzymes such as alkaline protease, trypsin and papain or a mixture of multiple enzymes, and the enzymatic conditions, such as enzyme concentration, temperature, pH value and enzymatic time, are optimized according to the type and activity of the selected enzyme to achieve efficient soy protein hydrolysis.
[0022] Furthermore, the concentration treatment step adopts vacuum concentration, membrane concentration or other suitable concentration methods to remove excess water in the colloid and improve the concentration and viscosity of the product.
[0023] Furthermore, the drying step adopts spray drying, vacuum drying, hot air drying or other suitable drying methods to remove the remaining water in the colloid to obtain a dried colloid.
[0024] Furthermore, the pulverizing step uses a pulverizer or other suitable pulverizing equipment to pulverize the dried colloid to obtain a soybean adhesive product with uniform particle size.
[0025] Beneficial Effects
[0026] Compared with the known public technology, the technical solution provided by the present invention has the following advantages:
[0027] Beneficial effects:
[0028] 1. In the present invention, soybeans are used as raw materials to prepare adhesives. Compared with traditional adhesives, soybean adhesives have a wide range of raw material sources and are relatively cheap, so they have cost advantages. At the same time, by optimizing the preparation process, such as the control of enzymatic hydrolysis conditions, the selection of concentration and drying methods, etc., the production cost is further reduced, the production efficiency is improved, the effective utilization of renewable resources is achieved, and the dependence on non-renewable resources such as petroleum is reduced, which helps to reduce carbon emissions in the production process and promote green and sustainable development.
[0029] 2. The present invention significantly improves the adhesive properties, stability and water resistance of the soybean adhesive by adding modifiers such as urea, acrylamide, etc. and reacting them chemically with soybean protein, which makes the prepared soybean adhesive have stronger adhesion and a wider range of applications.
[0030] 3. Since the soybean adhesive of the present invention has excellent performance and environmental protection, it can be widely used in many fields such as wood processing, furniture manufacturing, paper bonding, packaging materials, etc., which not only meets the market demand for environmentally friendly adhesives, but also promotes the development of related industries. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the present invention will be clearly and completely described in combination with the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0032] The present invention will be further described below in conjunction with the embodiments.
[0033] The invention discloses an efficient synthesis method in the preparation process of soybean adhesive, which comprises the following raw materials in parts by weight: soybean protein: 60%-80%; modifier: one or more mixtures of urea, acrylamide and polyvinyl alcohol are selected, and the addition amount thereof is 5%-15% of the weight of soybean protein; enzyme: one or more mixtures of alkaline protease, trypsin and papain are selected, and the addition amount thereof is 1%-5% of the weight of soybean protein; water: used for soaking and grinding soybeans, and subsequent concentration treatment, and the amount thereof is determined according to the actual needs in the preparation process.
[0034] The specific steps of the preparation method of the efficient synthesis method in the preparation process of soybean adhesive are as follows:
[0035] (1): Soybean pretreatment, selecting high-quality soybeans, and obtaining soybean pulp through pretreatment steps such as crushing, soaking, and grinding, wherein the crushing step is to crush the soybeans into fine particles to ensure the smooth progress of the subsequent steps, the soaking step is to soak the crushed soybeans in an appropriate amount of water to allow the soybeans to fully absorb water and swell, and the grinding step is to grind the soaked soybeans into fine soybean pulp using a colloid mill or a ball mill. The ground soybean pulp should have no obvious granularity and a fineness of less than 100 microns;
[0036] (2): Adding a modifier: add an appropriate amount of modifier to the soybean slurry and mix it evenly by stirring. The amount of modifier added should be determined according to the amount of soybean slurry and the required adhesive properties. Generally, the modifier accounts for 1%-5% of the mass of soybean slurry. The modifier can be selected from one or more mixtures of urea, acrylamide, and polyvinyl alcohol;
[0037] (3): Enzymatic hydrolysis treatment, wherein the mixed soybean slurry is subjected to enzymatic hydrolysis treatment. The type and amount of enzyme added have an important influence on the performance of the final product. The type of enzyme may be alkaline protease, trypsin, or papain;
[0038] (4): Concentration treatment: Concentrate the colloid after enzymatic hydrolysis to remove excess water. The concentration treatment can be carried out by vacuum concentration or membrane concentration method. The water content of the colloid after concentration should be controlled between 20% and 40%;
[0039] (5): Drying and crushing: The concentrated colloid is dried. The drying method can be spray drying, vacuum drying or hot air drying. The moisture content of the dried colloid should be less than 10%. Subsequently, the dried colloid is crushed by a crusher to obtain a soybean adhesive product with uniform particle size. The particle size is generally controlled between 80-200 mesh.
[0040] Example 1
[0041] Step 1: Soybean pretreatment
[0042] Select high-quality soybeans, crush them into 80-100 mesh fine particles, and then soak them for 4 hours at a soybean to water mass ratio of 1:2. The soaked soybeans are ground with a colloid mill to obtain fine soybean pulp.
[0043] Step 2: Adding modifier
[0044] 2% urea by mass of soybean paste was added into soybean paste as a modifier, and the mixture was mixed evenly by stirring.
[0045] Step 3: Enzymatic treatment
[0046] 0.2% alkaline protease by weight of soybean slurry was added, the enzymolysis temperature was controlled at 50°C, the pH value was 8.0, and the enzymolysis time was 2 hours.
[0047] Step 4: Concentration
[0048] The enzymatically hydrolyzed colloid was concentrated to a water content of 30% by vacuum concentration method.
[0049] Step 5: Drying and crushing
[0050] The concentrated colloid is dried to a moisture content of less than 8% by spray drying, and then crushed to 100-150 mesh.
[0051] The invention discloses an efficient synthesis method in the preparation process of soybean adhesive, comprising the following raw materials in parts by weight: soybean protein: 60%-80%; modifier: one or more mixtures of urea, acrylamide and polyvinyl alcohol are selected, and the addition amount thereof is 5%-15% of the weight of soybean protein; enzyme: one or more mixtures of alkaline protease, trypsin and papain are selected, and the addition amount thereof is 1%-5% of the weight of soybean protein; water: used for soaking and grinding soybeans, and subsequent concentration treatment, and the amount thereof is determined according to the actual needs in the preparation process.
[0052] The specific steps of the preparation method of the efficient synthesis method in the preparation process of soybean adhesive are as follows:
[0053] (1): Soybean pretreatment, selecting high-quality soybeans, and obtaining soybean pulp through pretreatment steps such as crushing, soaking, and grinding, wherein the crushing step is to crush the soybeans into fine particles to ensure the smooth progress of the subsequent steps, the soaking step is to soak the crushed soybeans in an appropriate amount of water to allow the soybeans to fully absorb water and swell, and the grinding step is to grind the soaked soybeans into fine soybean pulp using a colloid mill or a ball mill. The ground soybean pulp should have no obvious granularity and a fineness of less than 100 microns;
[0054] (2): Adding a modifier: add an appropriate amount of modifier to the soybean slurry and mix it evenly by stirring. The amount of modifier added should be determined according to the amount of soybean slurry and the required adhesive properties. Generally, the modifier accounts for 1%-5% of the mass of soybean slurry. The modifier can be selected from one or more mixtures of urea, acrylamide, and polyvinyl alcohol;
[0055] (3): Enzymatic hydrolysis treatment, wherein the mixed soybean slurry is subjected to enzymatic hydrolysis treatment. The type and amount of enzyme added have an important influence on the performance of the final product. The type of enzyme may be alkaline protease, trypsin, or papain;
[0056] (4): Concentration treatment: Concentrate the colloid after enzymatic hydrolysis to remove excess water. The concentration treatment can be carried out by vacuum concentration or membrane concentration method. The water content of the colloid after concentration should be controlled between 20% and 40%;
[0057] (5): Drying and crushing: The concentrated colloid is dried. The drying method can be spray drying, vacuum drying or hot air drying. The moisture content of the dried colloid should be less than 10%. Subsequently, the dried colloid is crushed by a crusher to obtain a soybean adhesive product with uniform particle size. The particle size is generally controlled between 80-200 mesh.
[0058] Example 2
[0059] Step 1: Soybean pretreatment
[0060] Select high-quality soybeans, crush them into 80-100 mesh fine particles, and then soak them for 4 hours at a soybean to water mass ratio of 1:2. The soaked soybeans are ground with a colloid mill to obtain fine soybean pulp.
[0061] Step 2: Adding modifier
[0062] Add 3% acrylamide by mass of soybean paste as a modifier into soybean paste and mix well.
[0063] Step 3: Enzymatic treatment
[0064] A mixture of trypsin and papain (1:1) at 0.3% by mass of soybean slurry was added, and the enzymolysis temperature was controlled at 55° C., the pH value was 8.5, and the enzymolysis time was 2.5 hours.
[0065] Step 4: Concentration
[0066] The enzymatically hydrolyzed colloid was concentrated to a water content of 25% by using a membrane concentration method.
[0067] Step 5: Drying and crushing
[0068] The concentrated colloid is dried to a moisture content of less than 6% by vacuum drying method, and then crushed to 150-200 mesh.
[0069] The invention discloses an efficient synthesis method in the preparation process of soybean adhesive, comprising the following raw materials in parts by weight: soybean protein: 60%-80%; modifier: one or more mixtures of urea, acrylamide and polyvinyl alcohol are selected, and the addition amount thereof is 5%-15% of the weight of soybean protein; enzyme: one or more mixtures of alkaline protease, trypsin and papain are selected, and the addition amount thereof is 1%-5% of the weight of soybean protein; water: used for soaking and grinding soybeans, and subsequent concentration treatment, and the amount thereof is determined according to the actual needs in the preparation process.
[0070] The specific steps of the preparation method of the efficient synthesis method in the preparation process of soybean adhesive are as follows:
[0071] (1): Soybean pretreatment, selecting high-quality soybeans, and obtaining soybean pulp through pretreatment steps such as crushing, soaking, and grinding, wherein the crushing step is to crush the soybeans into fine particles to ensure the smooth progress of the subsequent steps, the soaking step is to soak the crushed soybeans in an appropriate amount of water to allow the soybeans to fully absorb water and swell, and the grinding step is to grind the soaked soybeans into fine soybean pulp using a colloid mill or a ball mill. The ground soybean pulp should have no obvious granularity and a fineness of less than 100 microns;
[0072] (2): Adding a modifier: add an appropriate amount of modifier to the soybean slurry and mix it evenly by stirring. The amount of modifier added should be determined according to the amount of soybean slurry and the required adhesive properties. Generally, the modifier accounts for 1%-5% of the mass of soybean slurry. The modifier can be selected from one or more mixtures of urea, acrylamide, and polyvinyl alcohol;
[0073] (3): Enzymatic hydrolysis treatment, wherein the mixed soybean slurry is subjected to enzymatic hydrolysis treatment. The type and amount of enzyme added have an important influence on the performance of the final product. The type of enzyme may be alkaline protease, trypsin, or papain;
[0074] (4): Concentration treatment: Concentrate the colloid after enzymatic hydrolysis to remove excess water. The concentration treatment can be carried out by vacuum concentration or membrane concentration method. The water content of the colloid after concentration should be controlled between 20% and 40%;
[0075] (5): Drying and crushing: The concentrated colloid is dried. The drying method can be spray drying, vacuum drying or hot air drying. The moisture content of the dried colloid should be less than 10%. Subsequently, the dried colloid is crushed by a crusher to obtain a soybean adhesive product with uniform particle size. The particle size is generally controlled between 80-200 mesh.
[0076] Example 3
[0077] Step 1: Soybean pretreatment
[0078] Select high-quality soybeans, crush them into 80-100 mesh fine particles, and then soak them for 4 hours at a soybean to water mass ratio of 1:2. The soaked soybeans are ground with a colloid mill to obtain fine soybean pulp.
[0079] Step 2: Adding modifier
[0080] Add 4% of the mass of soybean paste and a mixture of acrylamide (1:1) as a modifier to soybean paste and mix well.
[0081] Step 3: Enzymatic treatment
[0082] A mixture of alkaline protease and trypsin (2:1) at 0.4% by mass of soybean slurry was added, and the enzymolysis temperature was controlled at 60° C., the pH value was controlled at 9.0, and the enzymolysis time was controlled at 3 hours.
[0083] Step 4: Concentration
[0084] The enzymatically hydrolyzed colloid was concentrated to a water content of 25% by using a membrane concentration method.
[0085] Step 5: Drying and crushing
[0086] The concentrated colloid is dried to a moisture content of less than 5% by hot air drying method, and then crushed to a size of more than 200 meshes.
[0087] The soybean adhesive prepared by Example 1 of the present invention has basic adhesive properties and good stability, and is suitable for general adhesive needs. Since the amount of modifier added is moderate, the cost is relatively low, and it is suitable for large-scale production;
[0088] Compared with Example 1, Example 2 of the present invention further improves the adhesive performance and stability of the soybean adhesive by using different modifiers and enzymatic hydrolysis conditions. The addition of acrylamide enhances the adhesion of the adhesive, making it suitable for occasions with higher requirements for adhesive strength. At the same time, the use of the membrane concentration method makes the moisture content lower, further improving the quality of the product.
[0089] By increasing the amount of modifier added and optimizing the enzymatic hydrolysis conditions in Example 3 of the present invention, the adhesive properties and stability of the soybean adhesive are significantly improved. The soybean adhesive has excellent adhesion and water resistance and is suitable for occasions with extremely high requirements for adhesive properties. However, due to the increase in the amount of modifier added and more stringent enzymatic hydrolysis conditions, the production cost may increase.
[0090] Performance Testing
[0091] Through the detailed comparison and effect description of the three embodiments, it can be seen that the selection of different modifiers, the addition amount and the optimization of enzymatic hydrolysis conditions have a significant impact on the adhesive performance, stability and production cost of the soybean adhesive. According to the actual application requirements and cost considerations, a suitable embodiment can be selected for production. Embodiment 1 is suitable for general bonding requirements and has a low cost; Embodiment 2 is suitable for occasions with high requirements for bonding strength; and Embodiment 3 is suitable for scenes with extremely high requirements for bonding performance and cost is not a major consideration. The obtained data are recorded in the following table:
[0092]
[0093]
[0094] In summary, the present invention uses soybean as a raw material to prepare the adhesive. Compared with traditional adhesives, the soybean adhesive has a wide range of raw material sources and a relatively low price, so it has a cost advantage. At the same time, by optimizing the preparation process, such as the control of enzymatic hydrolysis conditions, the selection of concentration and drying methods, etc., the production cost is further reduced, the production efficiency is improved, the effective utilization of renewable resources is achieved, and the dependence on non-renewable resources such as petroleum is reduced, which helps to reduce carbon emissions in the production process and promote green and sustainable development.
[0095] At the same time, since the soybean adhesive of the present invention has excellent performance and environmental protection, it can be widely used in multiple fields such as wood processing, furniture manufacturing, paper bonding, packaging materials, etc., which not only meets the market demand for environmentally friendly adhesives, but also promotes the development of related industries.
[0096] In addition, the present invention improves the heat resistance of the plastic masterbatch by introducing a polymer calcium zinc stabilizer with good heat resistance into the biodegradable polymer. In a high temperature environment, the plastic masterbatch prepared by the present invention has good stability, is not easy to deform or decompose, and can meet the requirements of high temperature processing and use.
[0097] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. An efficient synthesis method in the preparation process of soybean adhesive, characterized in that: The raw material composition includes the following parts by weight: soybean protein: 60%-80%; modifier: one or more mixtures of urea, acrylamide, and polyvinyl alcohol are selected, and the added amount is 5%-15% of the weight of the soybean protein; enzyme: one or more mixtures of alkaline protease, trypsin, and papain are selected, and the added amount is 1%-5% of the weight of the soybean protein; water: used for soaking and grinding soybeans, as well as subsequent concentration treatment, and the amount of water used is determined according to the actual needs in the preparation process.
2. The method for preparing a soybean adhesive according to claim 1, characterized in that: The specific steps include: (1): Soybean pretreatment: select high-quality soybeans, and obtain soybean paste after crushing, soaking, grinding and other pretreatment steps. The crushing step is to crush the soybeans into fine particles to ensure the smooth progress of the subsequent steps. The soaking step is to soak the crushed soybeans in a proper amount of water to allow the soybeans to fully absorb water and swell. The grinding step is to grind the soaked soybeans into fine soybean paste using a colloid mill or a ball mill. The ground soybean paste should have no obvious granularity and a fineness of less than 100 microns. (2): Adding modifiers: Add an appropriate amount of modifiers to the soybean slurry and mix them evenly by stirring. The amount of modifier added should be determined according to the amount of soybean slurry and the required adhesive properties. Generally, the modifier accounts for 1%-5% of the mass of soybean slurry. The modifier can be selected from one or more mixtures of urea, acrylamide, and polyvinyl alcohol; (3): Enzymatic hydrolysis treatment: the mixed soybean slurry is subjected to enzymatic hydrolysis treatment. The type and amount of enzyme added have an important influence on the performance of the final product. The type of enzyme can be alkaline protease, trypsin, or papain; (4): Concentration treatment: Concentrate the colloid after enzymatic hydrolysis to remove excess water. The concentration treatment can be carried out by vacuum concentration or membrane concentration method. The water content of the colloid after concentration should be controlled between 20% and 40%; (5): Drying and crushing: The concentrated colloid is dried. The drying method can be spray drying, vacuum drying or hot air drying. The moisture content of the dried colloid should be less than 10%. Subsequently, the dried colloid is crushed by a grinder to obtain a soybean adhesive product with uniform particle size. The particle size is generally controlled between 80-200 mesh.
3. The efficient synthesis method in the preparation process of a soybean adhesive according to claim 2, characterized in that: The particle size of the crushed soybeans in the crushing step of the soybean pretreatment should be controlled between 80-120 meshes, the soaking time in the soaking step of the soybean pretreatment is generally 4-6 hours, and the mass ratio of water to soybeans is controlled between 2:1 and 3:
1.
4. The efficient synthesis method in the preparation process of a soybean adhesive according to claim 2, characterized in that: The amount of enzyme added in the enzymatic hydrolysis treatment generally accounts for 0.1%-0.5% of the mass of the soybean milk. The enzymatic hydrolysis conditions include controlling the temperature at 40-60° C., the pH value at 7.0-9.0, and the enzymatic hydrolysis time is generally 1-3 hours.
5. The efficient synthesis method in the preparation process of a soybean adhesive according to claim 2, characterized in that: In the pretreatment step, the crushing step is carried out by a high-speed mixer or a hammer crusher to obtain fine-grained soybean particles, the soaking step uses an appropriate amount of water to allow the soybeans to fully absorb water and swell, and the grinding step uses a colloid mill or a ball mill to obtain fine and uniform soybean slurry. The concentration treatment step uses vacuum concentration, membrane concentration or other suitable concentration methods to remove excess water in the colloid and improve the concentration and viscosity of the product.
6. The efficient synthesis method in the preparation process of a soybean adhesive according to claim 2, characterized in that: The modifier is a substance that can improve the cross-linking degree of soybean protein, including but not limited to urea, acrylamide and polyvinyl alcohol, which can react chemically with soybean protein to improve the adhesive properties of the adhesive.
7. The efficient synthesis method in the preparation process of a soybean adhesive according to claim 2, characterized in that: In the enzymatic hydrolysis step, the types of enzymes used include but are not limited to single enzymes such as alkaline protease, trypsin and papain or a mixture of multiple enzymes. The enzymatic hydrolysis conditions, such as enzyme concentration, temperature, pH value and enzymatic hydrolysis time, are optimized according to the type and activity of the selected enzymes to achieve efficient soy protein hydrolysis.
8. The efficient synthesis method in the preparation process of a soybean adhesive according to claim 2 is characterized in that: The concentration step adopts vacuum concentration, membrane concentration or other suitable concentration methods to remove excess water in the colloid and improve the concentration and viscosity of the product.
9. The efficient synthesis method in the preparation process of a soybean adhesive according to claim 2, characterized in that: The drying step adopts spray drying, vacuum drying, hot air drying or other suitable drying methods to remove the remaining water in the colloid to obtain a dried colloid.
10. The efficient synthesis method in the preparation process of a soybean adhesive according to claim 2, characterized in that: The pulverizing step uses a pulverizer or other suitable pulverizing equipment to pulverize the dried colloid to obtain a soybean adhesive product with uniform particle size.