CN113717685A - Plant protein adhesive for solid wood composite floor and preparation method thereof - Google Patents
Plant protein adhesive for solid wood composite floor and preparation method thereof Download PDFInfo
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- CN113717685A CN113717685A CN202110783239.0A CN202110783239A CN113717685A CN 113717685 A CN113717685 A CN 113717685A CN 202110783239 A CN202110783239 A CN 202110783239A CN 113717685 A CN113717685 A CN 113717685A
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- 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
- C09J189/00—Adhesives based on proteins; Adhesives based on derivatives thereof
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- 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
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Abstract
The invention discloses a vegetable protein adhesive for a solid wood composite floor, which is prepared from the following raw materials in parts by weight: 200 parts of plant protein cake powder, 400 parts of deionized water, 600 parts of silkworm extract, 20-50 parts of crosslinking enhancer and 20-40 parts of protein treating agent. The preparation method comprises the following steps: hydrolyzing silkworm cocoon, filtering, adjusting acidity and alkalinity, and concentrating to obtain silkworm extract; adding plant protein cake meal, deionized water and a protein treating agent into a reaction kettle, and stirring at 50-60 ℃ to obtain a reaction mixture; adding the silkworm extract into the reaction mixture, adding a crosslinking enhancer, and continuously stirring at 50-60 ℃; and after the reaction is finished, cooling to room temperature to obtain the vegetable protein adhesive for the solid wood composite floor. The invention takes the vegetable protein cake as the main raw material, and substances such as the silkworm extract, the crosslinking reinforcing agent and the like are added, so that the physical and chemical properties of the adhesive can be effectively improved, and the production process is simplified.
Description
Technical Field
The invention relates to the technical field of adhesives for artificial boards, in particular to a plant protein adhesive for solid wood composite floors and a preparation method thereof.
Background
In 2019, the yield of the artificial board in China breaks through 3 billion cubic meters, and the traditional formaldehyde-formaldehyde glue (urea-formaldehyde resin, phenolic resin and melamine-formaldehyde resin) is mainly adopted as the adhesive of the artificial board. The formaldehyde-free glue belongs to formaldehyde wood adhesives, and the glued artificial board has the problem of formaldehyde pollution in different degrees, thereby greatly influencing the safety of indoor living environment. In recent years, with the increasing attention of the public on the environment and health, a series of environmental protection measures and regulations are provided in the country, and the low-aldehyde and aldehyde-free adhesive becomes a market hotspot and has a wide development prospect.
The solid wood composite floor is formed by alternately laminating plates of different tree species, overcomes the defects of wet expansion and dry shrinkage of the solid wood floor to a certain extent, and has the stability of a strengthened floor and the aesthetic property of the solid wood floor. All layers of the solid wood composite floor are glued by adopting an adhesive, and along with the application of formaldehyde-free adhesives such as polyurethane, soybean protein adhesive, isocyanate and the like, part of the solid wood composite floor realizes formaldehyde-free addition and release. The soybean protein adhesive is one of formaldehyde-free adhesives mainly adopted by solid wood composite floors, the unmodified soybean protein adhesive has the problems of poor water resistance, low bonding strength, poor corrosion resistance and the like, the water resistance and the bonding strength can be improved to a certain extent after modification, however, the modification process is complex, and the modifier is mostly organic compounds with higher cost and even has certain toxicity, so that the wide application of the protein adhesive is influenced to a certain extent.
Disclosure of Invention
Aiming at the prior art, the invention aims to provide the plant protein adhesive for the solid wood composite floor and the preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a plant protein adhesive for solid wood composite floors, which is prepared from the following raw materials in parts by weight: 200 parts of plant protein cake powder, 400 parts of deionized water, 600 parts of silkworm extract, 20-50 parts of crosslinking enhancer and 20-40 parts of protein treating agent.
Preferably, the silkworm extract is obtained by hydrolyzing, filtering, adjusting acidity and alkalinity and concentrating silkworm cocoons.
Preferably, the silkworm extract is obtained by hydrolyzing silkworm cocoon at pH of 9.5-10 for 0.5h, filtering, adjusting pH to 6.5-7, and concentrating.
Preferably, the vegetable protein cake powder is one or more of soybean cake powder, cotton cake powder and vegetable cake powder.
Preferably, the crosslinking enhancer is polyacrylamide.
Preferably, the protein treating agent is one or more of urea, guanidine hydrochloride, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate.
In a second aspect of the present invention, a preparation method of the plant protein adhesive for solid wood composite floors is provided, which comprises the following steps:
(1) hydrolyzing silkworm cocoon at pH of 9.5-10, filtering, adjusting pH of filtrate to 6.5-7, and concentrating to obtain silkworm extractive solution;
(2) adding plant protein cake meal, deionized water and a protein treating agent into a reaction kettle, and stirring at 50-60 ℃ to obtain a reaction mixture;
adding plant protein cake meal powder, deionized water and a protein treating agent, and allowing the protein to fully open a peptide chain under the action of the protein treating agent to expose a reaction group, so that the silkworm extract and a crosslinking enhancer in the next step can conveniently react with the protein cake meal powder, the deionized water and the protein treating agent;
(3) adding the silkworm extract obtained in the step (1) into the reaction mixture obtained in the step (2), adding a crosslinking enhancer, and continuously stirring at 50-60 ℃;
(4) and after the reaction is finished, cooling to room temperature to obtain the vegetable protein adhesive for the solid wood composite floor.
Preferably, in step (1), the hydrolysis time is 0.5 h.
Preferably, in the step (1), the hydrolysis temperature is 70-80 ℃, and the stirring speed is 800-.
Preferably, in step (1), the concentration is 10% of the filtrate.
Preferably, in the step (2), the stirring time is 1-2 hours, and the stirring speed is 600-.
Preferably, in the step (3), the stirring time is 1-2 hours, and the stirring speed is 600-.
The third aspect of the invention provides an application of the plant protein adhesive for the solid wood composite floor in preparing an artificial board.
The invention has the beneficial effects that:
1. the adhesive uses biomass resources (plant protein cakes) as main raw materials, no formaldehyde is added in the preparation process, and the glued artificial board does not release formaldehyde.
2. The invention utilizes the characteristics of the silkworm extract, wherein the silkworm extract mainly contains silk fibroin, the silk fibroin is natural polymer fiber protein extracted from mulberry silk, has good mechanical property and physical and chemical properties, and can obviously improve the flexibility and tensile resistance of the vegetable protein adhesive. The addition of the crosslinking enhancer polyacrylamide can generate crosslinking reaction with the plant protein and the silk fibroin, so that the density of a cured adhesive layer is improved, and the silk fibroin is firmly combined with the plant protein, thereby being beneficial to improving the physical and chemical properties of an adhesive film and improving the water resistance.
3. The preparation process of the adhesive is simple, energy-saving and environment-friendly, and the prepared plant protein adhesive bonded plywood for the solid wood composite floor meets the water-resistant bonding strength requirements of national standard (GB17657-2013 physical and chemical property experimental method for artificial boards and veneered artificial boards) class II plywood and national standard GB/T18103-2013 solid wood composite floor.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
As introduced in the background art, currently, when a soy protein adhesive is applied to the bonding of an artificial board, deep modification is generally required, and the soy protein adhesive can be processed by a chemical or physical method to obtain an adhesive product meeting the national standard requirements, however, the modification process is generally complex, and the modifier is mostly an organic compound with higher cost, even has a certain toxicity, and affects the wide application of the soy protein adhesive to a certain extent.
The invention aims to provide a vegetable protein adhesive for solid wood composite floors and a preparation method thereof. The basic performances (viscosity, storage period, solid content, working life and the like) of the plant protein adhesive for the solid wood composite floor prepared by the invention meet the requirements of industrial production, no formaldehyde is added, the glued product does not release formaldehyde, and the water-resistant gluing strength of the board meets the requirements of II-type plywood and national standard GB/T18103-2013-solid wood composite floor in the national standard (GB 17657-2013-physicochemical property experimental method for artificial board and veneer artificial board).
The test materials used in the examples of the present invention are all conventional in the art and commercially available.
Example 1: a preparation method of a vegetable protein adhesive for a solid wood composite floor comprises the following steps:
(1) hydrolyzing silkworm cocoon at pH of 9.5-10 for 0.5h at 70 deg.C under stirring at 1000r/min, filtering to obtain filtrate, adjusting pH of the filtrate to 6.5-7, and concentrating to 10% of the filtrate to obtain silkworm extractive solution; adjusting pH to 9.5-10 with sodium bicarbonate, and adjusting pH to 6.5-7 with hydrochloric acid;
(2) adding 100 parts of soybean protein cake meal powder, 400 parts of deionized water and 20 parts of sodium dodecyl benzene sulfonate into a reaction kettle, and stirring at 50-60 ℃ for 1 hour at the stirring speed of 1000r/min to obtain a reaction mixture;
(3) adding 20 parts of the silkworm extract obtained in the step (1) into the reaction mixture obtained in the step (2), adding 5 parts of polyacrylamide, and continuously stirring at 50-60 ℃; stirring for 1 hour at a speed of 1000 r/min;
(4) and after the reaction is finished, cooling to room temperature to obtain the vegetable protein adhesive for the solid wood composite floor. The performance index of the adhesive is shown in table 1.
Example 2: a preparation method of a vegetable protein adhesive for a solid wood composite floor comprises the following steps:
(1) hydrolyzing silkworm cocoon at pH of 9.5-10 for 0.5h at 80 deg.C under stirring at 800r/min, filtering to obtain filtrate, adjusting pH of the filtrate to 6.5-7, and concentrating to 10% of the filtrate to obtain silkworm extractive solution; adjusting pH to 9.5-10 with sodium bicarbonate, and adjusting pH to 6.5-7 with hydrochloric acid;
(2) adding 150 parts of soybean protein cake meal powder, 450 parts of deionized water and 30 parts of urea into a reaction kettle, and stirring at 50-60 ℃ to obtain a reaction mixture, wherein the stirring time is 2 hours and the stirring speed is 600 r/min;
(3) adding 25 parts of the silkworm extract obtained in the step (1) into the reaction mixture obtained in the step (2), adding 6 parts of polyacrylamide, and continuously stirring at 50-60 ℃; stirring for 2 hours at a speed of 600 r/min;
(4) and after the reaction is finished, cooling to room temperature to obtain the vegetable protein adhesive for the solid wood composite floor. The performance index of the adhesive is shown in table 1.
Example 3: a preparation method of a vegetable protein adhesive for a solid wood composite floor comprises the following steps:
(1) hydrolyzing silkworm cocoon at pH of 9.5-10 for 0.5h at 80 deg.C under stirring at 900r/min, adjusting pH value after filtering, filtering to obtain filtrate, adjusting pH value to 6.5-7, and concentrating to 10% of the filtrate to obtain silkworm extractive solution; adjusting pH to 9.5-10 with sodium bicarbonate, and adjusting pH to 6.5-7 with hydrochloric acid;
(2) adding 180 parts of cottonseed protein cake meal powder, 500 parts of deionized water and 35 parts of urea into a reaction kettle, and stirring at 50-60 ℃ to obtain a reaction mixture, wherein the stirring time is 1.5 hours, and the stirring speed is 800 r/min;
(3) adding 40 parts of the silkworm extract obtained in the step (1) into the reaction mixture obtained in the step (2), adding 8 parts of polyacrylamide, and continuously stirring at 50-60 ℃; stirring for 1.5 hours at a speed of 800 r/min;
(4) and after the reaction is finished, cooling to room temperature to obtain the vegetable protein adhesive for the solid wood composite floor. The performance index of the adhesive is shown in table 1.
Comparative example 1: a preparation method of a soy protein adhesive comprises the following steps:
(1) adding 100 parts of soybean protein cake meal powder, 400 parts of deionized water and 20 parts of sodium dodecyl benzene sulfonate into a reaction kettle, and stirring at 50-60 ℃ for 1 hour at the stirring speed of 1000r/min to obtain a reaction mixture;
(2) adding 5 parts of polyacrylamide, and continuously stirring at 50-60 ℃; stirring for 1 hour at a speed of 1000 r/min;
(3) and after the reaction is finished, cooling to room temperature to obtain the vegetable protein adhesive for the solid wood composite floor. The performance index of the adhesive is shown in table 1.
Comparative example 1 in comparison with example 1, no silkworm extract was added.
Comparative example 2: a preparation method of a soy protein adhesive comprises the following steps:
(1) hydrolyzing silkworm cocoon at pH of 9.5-10 for 0.5h at 70 deg.C under stirring at 1000r/min, filtering to obtain filtrate, adjusting pH of the filtrate to 6.5-7, and concentrating to 10% of the filtrate to obtain silkworm extractive solution; adjusting pH to 9.5-10 with sodium bicarbonate, and adjusting pH to 6.5-7 with hydrochloric acid;
(2) adding 100 parts of soybean protein cake meal powder and 400 parts of deionized water into a reaction kettle, and stirring at 50-60 ℃ to obtain a reaction mixture, wherein the stirring time is 1 hour, and the stirring speed is 1000 r/min;
(3) adding 20 parts of the silkworm extract obtained in the step (1) into the reaction mixture obtained in the step (2), adding 5 parts of polyacrylamide, and continuously stirring at 50-60 ℃; stirring for 1 hour at a speed of 1000 r/min;
(4) and after the reaction is finished, cooling to room temperature to obtain the vegetable protein adhesive for the solid wood composite floor. The performance index of the adhesive is shown in table 1.
Comparative example 2 compared to example 1, no protein treatment was added.
Comparative example 3: a preparation method of a soy protein adhesive comprises the following steps:
(1) hydrolyzing silkworm cocoon at pH of 9.5-10 for 0.5h at 70 deg.C under stirring at 1000r/min, filtering to obtain filtrate, adjusting pH of the filtrate to 6.5-7, and concentrating to 10% of the filtrate to obtain silkworm extractive solution; adjusting pH to 9.5-10 with sodium bicarbonate, and adjusting pH to 6.5-7 with hydrochloric acid;
(2) adding 100 parts of soybean protein cake meal powder, 400 parts of deionized water and 20 parts of sodium dodecyl benzene sulfonate into a reaction kettle, and stirring at 50-60 ℃ for 1 hour at the stirring speed of 1000r/min to obtain a reaction mixture;
(3) adding 20 parts of the silkworm extract obtained in the step (1) into the reaction mixture obtained in the step (2), and continuously stirring at 50-60 ℃; stirring for 1 hour at a speed of 1000 r/min;
(4) and after the reaction is finished, cooling to room temperature to obtain the vegetable protein adhesive for the solid wood composite floor. The performance index of the adhesive is shown in table 1.
Comparative example 3 compared to example 1, no crosslinking enhancer polyacrylamide was added.
Comparative example 4: a preparation method of a soy protein adhesive comprises the following steps:
(1) hydrolyzing silkworm cocoon at pH of 9.5-10 for 0.5h at 70 deg.C under stirring at 1000r/min, filtering to obtain filtrate, adjusting pH of the filtrate to 6.5-7, and concentrating to 10% of the filtrate to obtain silkworm extractive solution; adjusting pH to 9.5-10 with sodium bicarbonate, and adjusting pH to 6.5-7 with hydrochloric acid;
(2) adding 100 parts of soybean protein cake meal powder, 400 parts of deionized water and 20 parts of sodium dodecyl benzene sulfonate into a reaction kettle, and stirring at 50-60 ℃ for 1 hour at the stirring speed of 1000r/min to obtain a reaction mixture;
(3) and (3) adding 20 parts of the silkworm extract obtained in the step (1) into the reaction mixture obtained in the step (2), adding 5 parts of polyacrylamide, and cooling to room temperature to obtain the vegetable protein adhesive for the solid wood composite floor. The performance index of the adhesive is shown in table 1.
Comparative example 4 in comparison to example 1, step (3) was not stirred at 50-60 ℃.
Comparative example 5: a preparation method of a soy protein adhesive comprises the following steps:
(1) hydrolyzing silkworm cocoon for 0.5h, filtering to obtain filtrate, and concentrating the filtrate to 10% to obtain silkworm extract;
(2) adding 100 parts of soybean protein cake meal powder, 400 parts of deionized water and 20 parts of sodium dodecyl benzene sulfonate into a reaction kettle, and stirring at 50-60 ℃ for 1 hour at the stirring speed of 1000r/min to obtain a reaction mixture;
(3) adding 20 parts of the silkworm extract obtained in the step (1) into the reaction mixture obtained in the step (2), adding 5 parts of polyacrylamide, and continuously stirring at 50-60 ℃; stirring for 1 hour at a speed of 1000 r/min;
(4) and after the reaction is finished, cooling to room temperature to obtain the vegetable protein adhesive for the solid wood composite floor. The performance index of the adhesive is shown in table 1.
Comparative example 5 the silkworm extract liquid was prepared in a different process from that of example 1.
Comparative example 6
(1) Cleaning mulberry silkworm cocoon with clear water, drying, grinding, and sieving to obtain 200 mesh silkworm cocoon powder;
(2) adding 100 parts of soybean protein cake meal powder, 400 parts of deionized water and 20 parts of sodium dodecyl benzene sulfonate into a reaction kettle, and stirring at 50-60 ℃ for 1 hour at the stirring speed of 1000r/min to obtain a reaction mixture;
(3) adding 20 parts of silkworm cocoon powder obtained in the step (1) into the reaction mixture obtained in the step (2), adding 5 parts of polyacrylamide, and continuously stirring at 50-60 ℃; stirring for 1 hour at a speed of 1000 r/min;
(4) and after the reaction is finished, cooling to room temperature to obtain the vegetable protein adhesive for the solid wood composite floor. The performance index of the adhesive is shown in table 1.
Comparative example 6 in comparison with example 1, silkworm cocoon was used instead of silkworm extract.
The silkworm extract and the plant protein cake meal can react with a crosslinking reinforcing agent (polyacrylamide), the polyacrylamide has a chemical connection effect, and the two protein components are connected together, so that the method is a chemical modification method.
Verification example:
the adhesives prepared in the above examples 1-3 and comparative examples 1-6 are respectively adopted to press three-layer plywood, the thickness of the poplar veneer is about 1.7mm, the breadth is 500 x 500mm, and the water content is 8-10%. Gluing the two sides of the veneer: 280g/m2The pressure is as follows: 1.1-1.2MPa, and the hot pressing time is as follows: 5.0 minutes, the hot pressing temperature is: 145 ℃.
The wet bonding strength of the plywood is tested according to the steps in the experimental method for physical and chemical properties of artificial boards and decorative artificial boards of the national standard GB 17657-2013: and (3) soaking the artificial board test piece in hot water at 63 +/-3 ℃ for 3 hours, cooling for 10 minutes at room temperature, and then testing the shear strength. The results of the plywood property test of examples 1-3 and comparative examples 1-6 are shown in table 2.
The results show that the plywood prepared by the plant protein adhesive for the solid wood composite floor meets the requirements of national standard type II plywood, and the performance of the plywood is superior to that of a comparative plant protein adhesive.
TABLE 1 adhesive Performance index
Reference standard: national standard GB14074-2006 Wood adhesive and resin inspection method thereof.
Table 1 illustrates: the basic performance of the vegetable protein adhesive for the solid wood composite floor meets the production requirement of an artificial board, and the adhesive is free of formaldehyde.
Table 2 plywood bond strength test results
Reference standard: national standard GB17657-2013 physicochemical property experimental method for artificial boards and veneered artificial boards, and national standard GB/T18103-2013 solid wood composite floor.
Table 2 illustrates: the plywood prepared by the vegetable protein adhesive for the solid wood composite floor can meet the requirements of national standard II type boards, and the plywood prepared by the adhesive in the comparative examples 1-6 does not meet the requirements of the national standard.
The results show that the raw materials and the preparation method of the vegetable protein adhesive for the solid wood composite floor are an organic whole, and the performance of the prepared adhesive can be obviously reduced by reducing or changing the raw material composition or reducing a certain step in the preparation method.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The plant protein adhesive for the solid wood composite floor is characterized by being prepared from the following raw materials in parts by weight: 200 parts of plant protein cake powder, 400 parts of deionized water, 600 parts of silkworm extract, 20-50 parts of crosslinking enhancer and 20-40 parts of protein treating agent.
2. The plant protein adhesive for solid wood composite floors according to claim 1, which is characterized in that: the silkworm extract is obtained by hydrolyzing, filtering, adjusting acidity and alkalinity and concentrating silkworm cocoons.
3. The plant protein adhesive for solid wood composite floors as claimed in claim 2, wherein the adhesive comprises: the silkworm extractive solution is prepared by hydrolyzing silkworm cocoon at pH of 9.5-10 for 0.5h, filtering, adjusting pH to 6.5-7, and concentrating.
4. The plant protein adhesive for solid wood composite floors according to claim 1, which is characterized in that: the vegetable protein cake powder is one or more of soybean cake powder, cotton cake powder and vegetable cake powder.
5. The plant protein adhesive for solid wood composite floors according to claim 1, which is characterized in that: the crosslinking reinforcing agent is polyacrylamide.
6. The plant protein adhesive for solid wood composite floors according to claim 1, which is characterized in that: the protein treating agent is one or more of urea, guanidine hydrochloride, sodium dodecyl benzene sulfonate and sodium dodecyl sulfate.
7. The method for preparing the plant protein adhesive for the solid wood composite floor as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) hydrolyzing silkworm cocoon at pH of 9.5-10, filtering, adjusting pH of filtrate to 6.5-7, and concentrating to obtain silkworm extractive solution;
(2) adding plant protein cake meal, deionized water and a protein treating agent into a reaction kettle, and stirring at 50-60 ℃ to obtain a reaction mixture;
(3) adding the silkworm extract obtained in the step (1) into the reaction mixture obtained in the step (2), adding a crosslinking enhancer, and continuously stirring at 50-60 ℃;
(4) and after the reaction is finished, cooling to room temperature to obtain the vegetable protein adhesive for the solid wood composite floor.
8. The method of claim 7, wherein: in the step (2), the stirring time is 1-2 hours, and the stirring speed is 600-1000 r/min.
9. The method of claim 7, wherein: in the step (3), the stirring time is 1-2 hours, and the stirring speed is 600-.
10. Use of the vegetable protein adhesive for solid wood composite floor according to any one of claims 1 to 6 for the preparation of artificial boards.
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| CN202110783239.0A CN113717685A (en) | 2021-07-12 | 2021-07-12 | Plant protein adhesive for solid wood composite floor and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114958297A (en) * | 2022-04-26 | 2022-08-30 | 西南林业大学 | High-performance protein-based adhesive and preparation method and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114958297A (en) * | 2022-04-26 | 2022-08-30 | 西南林业大学 | High-performance protein-based adhesive and preparation method and application thereof |
| CN114958297B (en) * | 2022-04-26 | 2023-03-10 | 西南林业大学 | High-performance protein-based adhesive and preparation method and application thereof |
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Application publication date: 20211130 |