CN111040728A - Yeast protein adhesive and preparation method and application thereof - Google Patents
Yeast protein adhesive and preparation method and application thereof Download PDFInfo
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- CN111040728A CN111040728A CN201911252690.9A CN201911252690A CN111040728A CN 111040728 A CN111040728 A CN 111040728A CN 201911252690 A CN201911252690 A CN 201911252690A CN 111040728 A CN111040728 A CN 111040728A
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- yeast protein
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- polyvinyl alcohol
- protein adhesive
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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
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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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
- C09J129/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Adhesives based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Adhesives based on derivatives of such polymers
- C09J129/02—Homopolymers or copolymers of unsaturated alcohols
- C09J129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention belongs to the technical field of formaldehyde-free environment-friendly adhesives, and discloses a yeast protein adhesive and a preparation method and application thereof, wherein the yeast protein adhesive comprises 2-6 parts of yeast protein powder, 0.1-0.3 part of sodium dodecyl sulfate, 3-5 parts of polyvinyl alcohol, 0.02-0.4 part of a cross-linking agent, and 2-6 parts of water. The adhesive does not contain harmful volatile matters carried by aldehyde adhesives such as formaldehyde, phenol and the like, has good adhesive bonding performance and lower viscosity, and has simple preparation process and lower cost. The invention also provides a method for preparing plywood by using the adhesive, and the obtained board has good bonding strength.
Description
Technical Field
The invention belongs to the technical field of formaldehyde-free environment-friendly adhesives, and particularly relates to a yeast protein adhesive as well as a preparation method and application thereof.
Background
The solid content of the adhesive used in the wood industry of China exceeds 1500 ten thousand tons, wherein the occupancy rate of aldehyde adhesives such as urea-formaldehyde glue, phenol-formaldehyde glue and melamine-formaldehyde glue in the wood industry reaches 80-90 percent. The aldehyde adhesives are widely used due to their excellent gluing properties and water resistance. However, as global resource shortages become more severe, these petroleum-based products face a variety of problems. And the aldehyde adhesive and the products thereof can release harmful substances such as free formaldehyde and the like to harm human health in the production and use processes. In recent years, along with the increasing awareness of environmental protection and the awareness of creating good air quality, the requirements of various countries in the world on the formaldehyde release concentration in the working environment are increasing.
In recent years, the synthesis of adhesives by using biomass as a raw material has gradually become a research focus, and the research on plant soybean protein is the most prominent. The molecular structure of protein contains many active groups such as amino, hydroxyl, carboxyl, phenolic hydroxyl, disulfide and the like, and can be bonded with the surface of wood through chemical reaction. However, the main disadvantages of the protein adhesive are low bonding strength, high viscosity, poor initial adhesion and the like, and the strength of the prepared artificial board cannot meet the national standard. At present, there are many reports on improving the bonding strength of soybean protein adhesives, for example, chemical products synthesized from fossil raw materials such as formaldehyde, glutaraldehyde, isocyanate, phenol, etc. are used for modification, and the obtained board meets the bonding strength requirement of the artificial board in China, but the problems of environmental pollution, harm to human health, etc. are still faced in the reproduction and use processes of the chemical products. In addition, the soybean is taken as a main food product in agricultural production, the harvest of the soybean is easily influenced by climatic conditions, the annual output has certain fluctuation, and the excessive utilization of the soybean for preparing and developing the adhesive is related to the national food safety problem. Therefore, the development of an adhesive which is environment-friendly, free of aldehyde and non-toxic, wide in raw material source and capable of meeting the industrial requirements is urgently needed.
Yeast protein, also called microbial protein, is a single-cell protein, and is mainly the main ingredient of microbial thallus such as yeast, bacteria, fungi and microalgae artificially cultured by using byproducts or wastes of industrial, agricultural and petroleum industries as raw materials. The nucleotide yeast is a functional yeast prepared by continuously fermenting yeast by utilizing molasses and starch sugar, and separating, concentrating, breaking the wall, performing directional enzymolysis, drying and crushing fermentation liquor, wherein the protein content in the yeast is higher than 50 percent of that of soybean protein, and the yeast contains more amino acid active groups, so that a good adhesive molecular structure can be formed. Secondly, the yeast is used as a raw material, the source is wide, the substrate conversion efficiency is high, the growth and propagation speed is high, and the growth is not influenced by seasons, climates and regional factors. Moreover, the production process is clean, environment-friendly and pollution-free. At present, the utilization of related yeast proteins is mostly concentrated in the functional new feed or the poultry and aquatic product industry, and the preparation of the modified biomass environment-friendly wood adhesive by using the yeast proteins as raw materials is only reported.
Disclosure of Invention
In order to solve the defects and shortcomings of the prior art, the invention aims to provide a yeast protein adhesive. The adhesive has no harmful volatile substances such as formaldehyde, phenol and the like, has good adhesive bonding performance and low viscosity, and can relieve the problems of energy and environment pollution and the like caused by the preparation of the adhesive by non-renewable raw materials such as petroleum fossil fuel and the like by utilizing yeast renewable raw materials. Meanwhile, the plywood prepared by the adhesive provided by the invention has high bonding strength and good initial adhesion.
The invention also aims to provide a preparation method of the yeast protein adhesive. The method is simple and low in cost.
The invention also aims to provide application of the yeast protein adhesive. The plywood prepared by the method has high bonding strength and good initial adhesion.
The purpose of the invention is realized by the following technical scheme:
the yeast protein adhesive comprises, by weight, 2-6 parts of yeast protein powder, 0.1-0.3 part of sodium dodecyl sulfate, 3-5 parts of polyvinyl alcohol, 0.02-0.4 part of a cross-linking agent and 2-6 parts of water.
Preferably, the yeast protein adhesive comprises, by weight, 3-4 parts of yeast protein powder, 0.1-0.2 part of sodium dodecyl sulfate, 3.5-4.5 parts of polyvinyl alcohol, 0.04-0.2 part of a cross-linking agent and 3-5 parts of water.
Preferably, the yeast protein powder is nucleotide yeast protein.
Preferably, the mass concentration of the polyvinyl alcohol is 5-10 wt%.
Preferably, the crosslinking agent is more than one of ethylene glycol diglycidyl ether, butyl glycidyl ether and 1, 6-hexanediol diglycidyl ether.
The preparation method of the yeast protein adhesive comprises the following steps:
s1, adding water into polyvinyl alcohol at room temperature, and uniformly stirring to obtain a polyvinyl alcohol solution;
s2, adding yeast protein powder into the polyvinyl alcohol solution and keeping stirring until the yeast protein powder is completely dissolved;
s3, adding sodium dodecyl sulfate and continuing stirring; finally, adding the cross-linking agent and stirring to prepare the yeast protein adhesive.
Preferably, in the step S3, the stirring time is 30-40 min when the sodium dodecyl sulfate is added;
preferably, the time for adding the cross-linking agent and stirring in the step S3 is 2-3 h.
The application of the yeast protein adhesive in the field of plywood preparation.
In the invention, the polyvinyl alcohol is selected as a solution with the mass fraction of 5-10%, and a large number of hydroxyl groups in the polyvinyl alcohol can be subjected to esterification reaction with carboxyl groups in protein to improve the density of a cross-linked network; meanwhile, in the process of bonding the plywood, the polyvinyl alcohol and hydrophilic cellulose have better bonding force, and the polyvinyl alcohol serves as a good auxiliary agent in the whole adhesive system. The cross-linking agent is one or more of ethylene glycol diglycidyl ether, butyl glycidyl ether and 1, 6-hexanediol diglycidyl ether, all of which carry epoxy groups, and can generate ring-opening reaction at 50 ℃, the epoxy groups with the hot-pressing temperature of more than 100 ℃ generate ring-opening reaction with amino, carboxyl, disulfide and other active groups in protein and hydroxyl and carboxyl groups on the surface of wood in the process of preparing the plywood, and the adhesive forms a stable cross-linking network after being cured. In addition, before solidification occurs, the ethylene glycol diglycidyl ether is crossed with protein macromolecules to form oily micromolecules, and in an adhesive system, the ethylene glycol diglycidyl ether is used as a lubricant to reduce the mutual winding of the protein molecules which form clusters by long peptide chains, so that the viscosity of the system is reduced.
Compared with the prior art, the invention has the following beneficial effects:
1. the yeast protein adhesive disclosed by the invention does not contain harmful gases such as formaldehyde, the utilized raw materials can be environment-friendly and renewable, the yeast protein adhesive prepared by taking the yeast protein as the main raw material overcomes the dependence on non-renewable resources such as fossil, petroleum and the like, the problems of pollution to the environment and harm to human health caused by harmful substances such as formaldehyde and the like are solved, and the yeast cultured by utilizing waste resources is also a kind of recycling of resources.
2. The yeast protein adhesive has good fluidity and initial viscosity, good bonding performance, lower viscosity and easy gluing, and the plywood prepared by the yeast protein adhesive has excellent gluing performance, meets the related requirements of national II-type plywood, and is a green, environment-friendly and renewable artificial board product.
3. The invention has the characteristics of less raw materials needed for preparing the adhesive, low energy consumption for reaction at room temperature and the like.
Detailed Description
The following examples are presented to further illustrate the present invention and should not be construed as limiting the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art. Reagents, methods and apparatus used in the present invention are conventional in the art unless otherwise indicated.
The mass concentration of the polyvinyl alcohol in the embodiment of the invention is 5-10 wt%.
Example 1
The yeast protein adhesive comprises the following components in percentage by mass: 3 parts of water; 3 parts of nucleotide yeast protein and 4 parts of polyvinyl alcohol; 0.1 part of sodium dodecyl sulfate.
Example 2
The yeast protein adhesive comprises the following components in percentage by mass: 3 parts of water; 3 parts of nucleotide yeast protein; 4 parts of polyvinyl alcohol; 0.1 part of sodium dodecyl sulfate; ethylene glycol diglycidyl ether 0.04 parts.
Example 3
The yeast protein adhesive comprises the following components in percentage by mass: 3 parts of water; 3 parts of nucleotide yeast protein; 4 parts of polyvinyl alcohol; 0.1 part of sodium dodecyl sulfate; ethylene glycol diglycidyl ether 0.12 parts.
Example 4
The yeast protein adhesive comprises the following components in percentage by mass: 3 parts of water; 3 parts of nucleotide yeast protein; 4 parts of polyvinyl alcohol; 0.1 part of sodium dodecyl sulfate; ethylene glycol diglycidyl ether 0.16 parts.
Example 5
The yeast protein adhesive comprises the following components in percentage by mass: 3 parts of water; 3 parts of nucleotide yeast protein; 4 parts of polyvinyl alcohol; 0.1 part of sodium dodecyl sulfate; ethylene glycol diglycidyl ether 0.2 parts.
Example 6
The yeast protein adhesive comprises the following components in percentage by mass: 3 parts of water; 2 parts of nucleotide yeast protein; 5 parts of polyvinyl alcohol; 0.2 part of sodium dodecyl sulfate; butyl glycidyl ether 0.2 part.
Example 7
The yeast protein adhesive comprises the following components in percentage by mass: 3 parts of water; 6 parts of nucleotide yeast protein; 3 parts of polyvinyl alcohol; 0.3 part of sodium dodecyl sulfate; ethylene glycol diglycidyl ether 0.04 parts.
Example 8
The yeast protein adhesive comprises the following components in percentage by mass: 4 parts of water; 6 parts of nucleotide yeast protein; 5 parts of polyvinyl alcohol; 0.3 part of sodium dodecyl sulfate; ethylene glycol diglycidyl ether 0.4 parts.
Example 9
The yeast protein adhesive comprises the following components in percentage by mass: 5 parts of water; 6 parts of nucleotide yeast protein; 5 parts of polyvinyl alcohol; 0.3 part of sodium dodecyl sulfate; 0.4 part of 1, 6-hexanediol diglycidyl ether.
Example 10
The yeast protein adhesive comprises the following components in percentage by mass: 5 parts of water; 4 parts of nucleotide yeast protein; 4.5 parts of polyvinyl alcohol; 0.2 part of sodium dodecyl sulfate; 0.3 part of 1, 6-hexanediol diglycidyl ether.
Example 11
The yeast protein adhesive comprises the following components in percentage by mass: 5 parts of water; 4 parts of nucleotide yeast protein; 3.5 parts of polyvinyl alcohol; 0.2 part of sodium dodecyl sulfate; 0.1 part of 1, 6-hexanediol diglycidyl ether.
Example 12
The yeast protein adhesive comprises the following components in percentage by mass: 2 parts of water; 2 parts of nucleotide yeast protein; 3 parts of polyvinyl alcohol; 0.1 part of sodium dodecyl sulfate; 0.15 part of 1, 6-hexanediol diglycidyl ether.
The yeast protein adhesive prepared in the examples 1-5 is applied according to a single-side application amount of 300-2Coating on the surface of a eucalyptus veneer (2.2mm veneer, three layers in total, the water content is maintained at about 13%), prepressing for 20min, and hot pressing at 120 deg.C under 1.4MPa for 3 min; then, the pressure is reduced to 1.2MPa for 2min, and then the pressure is reduced to 0MPa within 5min, thus preparing the plywood.
The hot pressed board was left standing at room temperature for 24 hours for testing its performance. Testing performance indexes such as appearance inspection, viscosity, free formaldehyde content and the like of the prepared yeast protein adhesive according to the requirements of the GB/T14074-2006 wood adhesive and a resin inspection method thereof; the performance indexes such as dry bond strength, formaldehyde emission and the like of the prepared plywood are tested according to the requirements in the test methods of the physical and chemical properties of the GB/T17657-2013 artificial boards and the decorative artificial boards, and are shown in Table 1.
TABLE 1 physicochemical Properties of Yeast protein Adhesives and plywood made in examples 1-5
Table 1 shows the physical and chemical properties of the yeast protein adhesive and plywood produced in examples 1-5. As can be seen from table 1, no formaldehyde emission was detected in the plywood prepared using the yeast protein adhesive using the conventional test methods. From the analysis of the viscosity of the plywood with the yeast protein adhesive in examples 1-5, the viscosity of the glue solution prepared without adding ethylene glycol diglycidyl ether is 2342mpa · s, the viscosity is continuously reduced along with the increase of the concentration of the added ethylene glycol diglycidyl ether, and when the glue solution is added to 0.2 part of ethylene glycol diglycidyl ether, the viscosity is 1010mpa · s, which is completely suitable for the gluing requirement of the plywood. With the increase of the concentration of ethylene glycol diglycidyl ether, the crosslinking network density is continuously increased, and the solid content is increased from 26.93 percent to 33.84 percent. When the ethylene glycol diglycidyl ether is not added into the adhesive, the dry bonding strength of the plywood prepared by the adhesive is 0.4137Mpa, which can not meet the strength requirement of national II-type plywood, the bonding strength is continuously improved along with the improvement of the concentration of the ethylene glycol diglycidyl ether in the adhesive, and when 0.12 part of the ethylene glycol diglycidyl ether is added, the dry bonding strength is 0.8001Mpa, which meets the requirement of the national II-type plywood. In addition, the other crosslinking agents of butyl glycidyl ether and 1, 6-hexanediol diglycidyl ether have the effect similar to that of ethylene glycol diglycidyl ether under the same condition, but the molecular weight of the ethylene glycol diglycidyl ether is relatively small, the epoxy equivalent is high under the same addition amount, and the crosslinking effect is good.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations and simplifications are intended to be included in the scope of the present invention.
Claims (9)
1. The yeast protein adhesive is characterized by comprising, by weight, 2-6 parts of yeast protein powder, 0.1-0.3 part of sodium dodecyl sulfate, 3-5 parts of polyvinyl alcohol, 0.02-0.4 part of a cross-linking agent and 2-6 parts of water.
2. The yeast protein adhesive as claimed in claim 1, wherein the yeast protein adhesive comprises 3-4 parts by weight of yeast protein powder, 0.1-0.2 part by weight of sodium dodecyl sulfate, 3.5-4.5 parts by weight of polyvinyl alcohol, 0.04-0.2 part by weight of cross-linking agent and 3-5 parts by weight of water.
3. A yeast protein adhesive according to claim 1 or 2 wherein the yeast protein powder is a nucleotide yeast protein.
4. The yeast protein adhesive according to claim 1 or 2, wherein the mass concentration of the polyvinyl alcohol is 5-10 wt%.
5. The yeast protein adhesive according to claim 1 or 2, wherein the cross-linking agent is one or more of ethylene glycol diglycidyl ether, butyl glycidyl ether, and 1, 6-hexanediol diglycidyl ether.
6. A method of preparing a yeast protein adhesive according to any of claims 1-5, comprising the steps of:
s1, adding polyvinyl alcohol into water at room temperature, and uniformly stirring to obtain a polyvinyl alcohol solution;
s2, adding yeast protein powder into the polyvinyl alcohol solution and stirring until the yeast protein powder is completely dissolved;
and S3, adding the sodium dodecyl sulfate, continuously stirring, adding the cross-linking agent, and stirring to obtain the yeast protein adhesive.
7. The method for preparing yeast protein adhesive according to claim 6, wherein the stirring time in the step S3 is 30-40 min when sodium dodecyl sulfate is added.
8. The method for preparing the yeast protein adhesive according to claim 6, wherein the time for adding, crosslinking and stirring in the step S3 is 2-3 h.
9. Use of a yeast protein adhesive according to any one of claims 1 to 5 in the field of plywood production.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911252690.9A CN111040728A (en) | 2019-12-09 | 2019-12-09 | Yeast protein adhesive and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911252690.9A CN111040728A (en) | 2019-12-09 | 2019-12-09 | Yeast protein adhesive and preparation method and application thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111978917A (en) * | 2020-07-17 | 2020-11-24 | 厦门大学 | Preparation method of rapeseed protein adhesive based on ultrahigh pressure and EGDE composite modification |
| CN113913152A (en) * | 2021-10-08 | 2022-01-11 | 华南农业大学 | Spirulina protein adhesive and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475790A (en) * | 2008-01-04 | 2009-07-08 | 杨光 | Novel timber adhesive and preparation thereof |
| WO2017075725A1 (en) * | 2015-11-05 | 2017-05-11 | Universidad Del Bio Bio | Yeast-based adhesive extract, composition and method |
| CN110272714A (en) * | 2019-05-27 | 2019-09-24 | 华南农业大学 | A kind of glued board aldehyde-free environment-friendly lactalbumin adhesive and preparation method thereof |
-
2019
- 2019-12-09 CN CN201911252690.9A patent/CN111040728A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475790A (en) * | 2008-01-04 | 2009-07-08 | 杨光 | Novel timber adhesive and preparation thereof |
| WO2017075725A1 (en) * | 2015-11-05 | 2017-05-11 | Universidad Del Bio Bio | Yeast-based adhesive extract, composition and method |
| CN110272714A (en) * | 2019-05-27 | 2019-09-24 | 华南农业大学 | A kind of glued board aldehyde-free environment-friendly lactalbumin adhesive and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111978917A (en) * | 2020-07-17 | 2020-11-24 | 厦门大学 | Preparation method of rapeseed protein adhesive based on ultrahigh pressure and EGDE composite modification |
| CN111978917B (en) * | 2020-07-17 | 2021-08-24 | 厦门大学 | Preparation method of rapeseed protein adhesive based on ultrahigh pressure and EGDE composite modification |
| CN113913152A (en) * | 2021-10-08 | 2022-01-11 | 华南农业大学 | Spirulina protein adhesive and preparation method and application thereof |
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Application publication date: 20200421 |