CN114685922A - Bio-based itaconate rubber gloves and preparation method thereof - Google Patents
Bio-based itaconate rubber gloves and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of rubber, in particular to a bio-based itaconate rubber glove and a preparation method thereof. The gloves are prepared by using the itaconic acid ester latex derived from the bio-base instead of the traditional natural latex and the petrochemical-base latex, so that the dependence on hevea and petrochemical energy can be reduced, and meanwhile, the itaconic acid ester rubber does not contain protein, and the allergy and shock risks in the process of wearing the gloves can be reduced.
Description
Technical Field
The invention belongs to the technical field of rubber materials, and particularly relates to a bio-based itaconate rubber glove and a preparation method thereof.
Background
The natural latex gloves have the advantages of good elasticity, acid and alkali resistance, durability and the like, but are easy to cause allergy, and even have cases of death caused by allergy, and the natural latex comprises rubber hydrocarbon, water, a small amount of non-rubber substances such as protein, resin, saccharides, inorganic salt and the like. The market demand for natural latex gloves has been exuberant for over a century. However, natural latex gloves are exposed to the safety risks for human health in use, including the potential risk of protein allergy to some users, tumor induction by nitrosamines generated during processing, and respiratory inflammation or allergy, dermatitis, wound infection, etc. when powdered gloves are used in medical fields (Lexifeng, Luminzi, Liyongyao, Liu Yu Hao. development of natural latex gloves and synthetic latex gloves [ J/OL ]. rubber industry: 1-7[2020-12-22 ]). At present, natural latex used in the world is almost completely derived from hevea trees, and the planting environment of the hevea trees is harsh, so that the natural latex is only suitable for growing in tropical regions and is threatened by southern American blight and the like in recent years; therefore, the price of the natural latex increases year by year, the cost rises, and the popularization of the natural latex gloves is greatly limited by the problems. The butyronitrile latex is polymerized by acrylonitrile and butadiene, is prepared by processes of dipping a coagulant, the butyronitrile latex, vulcanization, surface treatment and the like, has the advantages of less allergy generation, good ductility, chemical resistance, durable wearing and the like, and can provide good protection for users (Chinese patent CN110317380A, Liuwenjing, Sunjun, Zhangnian, Caoyuan, Chuankue, Liuhongming, a butyronitrile glove and a preparation method [ P ]). However, the nitrile gloves on the market at present have poor flexibility, are higher in price than latex products and are to be further improved, and the waste of the nitrile latex gloves can generate harmful substances to pollute the environment.
Disclosure of Invention
In order to solve the technical problems, the invention adopts the itaconic acid ester derived from the biological group and the butadiene to carry out copolymerization to obtain the biological group itaconic acid ester latex, and the biological group itaconic acid ester latex is used for replacing the traditional natural latex and petrochemical group latex to prepare the gloves, thereby not only reducing the dependence on hevea trees and petrochemical energy, but also reducing the allergy and shock risks in the process of wearing the gloves because the itaconic acid ester rubber does not contain protein.
The invention aims to provide a bio-based itaconate rubber glove, which comprises a blended bio-based itaconate rubber, a vulcanizing agent and an accelerator.
Wherein, the vulcanizing agent is selected from sulfur; the vulcanizing agent can promote the vulcanization reaction of the bio-based itaconate rubber;
the accelerator is selected from at least one of dithiocarbamates and thiazoles, preferably at least one of 2-mercaptobenzothiazole, zinc di-n-butyldithiocarbamate and zinc diethyldithiocarbamate;
based on 100 parts by weight of the bio-based itaconate rubber, the vulcanizing agent is 0.5-5 parts, the accelerator is 0.1-5 parts, preferably, the vulcanizing agent is 1-2 parts, and the accelerator is 0.5-1 part;
the rubber gloves also contain at least one of potassium hydroxide, zinc oxide and filler; based on 100 parts by weight of the bio-based itaconate rubber, the using amount of the potassium hydroxide is 0.01-1 part, the using amount of the zinc oxide is 0.5-10 parts, and the using amount of the filler is 0-20 parts; preferably, the amount of the potassium hydroxide is 0.01-1 part, the amount of the zinc oxide is 0.5-10 parts, and the amount of the filler is 0-10 parts, based on 100 parts by weight of the bio-based itaconate rubber.
In the bio-based itaconate rubber glove, the bio-based itaconate rubber is obtained by copolymerizing an itaconate monomer and a diene compound;
wherein the molar ratio of the itaconate monomer to the diene compound is 1 (1-7), preferably 1 (1.9-4.5);
the itaconate monomer is selected from at least one of monomethyl itaconate, dimethyl itaconate, monoethyl itaconate, diethyl itaconate, monopropyl itaconate, dipropyl itaconate, monobutyl itaconate, dibutyl itaconate, monopentyl itaconate, dipentyl itaconate, monohexyl itaconate, dihexyl itaconate, monopentyl itaconate, diheptyl itaconate, monooctyl itaconate, monononyl itaconate, didecyl itaconate, preferably at least one of dimethyl itaconate, diethyl itaconate, dipropyl itaconate and dibutyl itaconate;
the diene compound is at least one selected from butadiene and isoprene, and is preferably selected from butadiene.
The invention also aims to provide a preparation method of the bio-based itaconate rubber gloves, which comprises the following steps:
step one, uniformly stirring the components including the itaconate rubber, the vulcanizing agent and the accelerator, and standing to obtain slurry;
step two, dipping the glove model into a coagulant solution, taking out and drying;
and step three, dipping the glove model obtained after drying in the step two into the slurry obtained in the step one, and obtaining the bio-based itaconate rubber glove after vulcanization reaction and demoulding.
Specifically, at least one of potassium hydroxide, zinc oxide and a filler is added in the step one; the added KOH is used for adjusting the pH value of the prepared itaconate latex slurry, the stability of the latex is enhanced, and meanwhile, the improvement of the tensile strength of itaconate gloves is promoted; the added zinc oxide can promote the pre-vulcanization of the itaconate rubber gloves, and shorten the pre-vulcanization reaction time; the filler is selected from at least one of white carbon black, calcium carbonate and barium sulfate, preferably, water slurry of the filler is added, and the mechanical property of the itaconate gloves can be further improved by the added filler.
The stirring temperature in the first step is 20-30 ℃, and the stirring time is 1-2 h;
standing for 12-24 hours in the first step at room temperature;
the coagulant in the second step is selected from soluble metal salts, preferably at least one selected from calcium chloride, calcium nitrate, magnesium chloride, magnesium nitrate, zinc nitrate and zinc chloride;
the mass percentage concentration of the coagulant in the coagulant solution in the second step is 15-25%;
the dipping temperature in the second step is 25-55 ℃, and the dipping time is 5-15 s;
the drying temperature in the second step is 60-80 ℃, and the drying time is 10-30 min;
before dipping, the glove model in the second step needs to be subjected to acid washing, alkali washing, rinsing and drying treatment; the solution adopted by acid washing is at least one of a nitric acid solution and a hydrochloric acid solution, and the pH value of the solution adopted by acid washing is 3-5; the solution adopted by the alkaline washing is at least one of a sodium hydroxide solution and a potassium hydroxide solution, and the pH value of the solution adopted by the alkaline washing is 9-12; the rinsing can be carried out by adopting a common rinsing mode and washing with water; the drying treatment can also adopt a common drying mode, for example, drying at 60-80 ℃ for 20-30 min.
The dipping temperature in the third step is 25-35 ℃, and the dipping time is 1-6 min; after the dried glove model in the third step is soaked in the slurry, the dropping operation is also included, and a dropping method commonly used in the field can be adopted;
the vulcanization reaction temperature in the third step is 110-140 ℃, and the vulcanization reaction time is 0.5-1 h;
after the vulcanization reaction in the third step, leaching, curling, cleaning and drying treatment are needed; and (4) soaking the dried glove model in the slurry again, repeating the operation process of the third step for 2-5 times. The above-described leaching, curling and drying processes may be performed in the manner of operations commonly used in the art.
In the above preparation method, the bio-based itaconate rubber is obtained by polymerizing components including itaconate monomer and diene compound, and preferably includes the following steps:
step 1, adding deionized water, an emulsifier, an electrolyte, an activator, an antioxidant and an itaconate monomer into a reaction vessel, and uniformly mixing;
step 2, adding a diene compound into the mixture obtained in the step 1, adding an initiator after pre-emulsification, and then carrying out polymerization reaction;
and 3, after the reaction is finished, adding a terminator into the reaction container, and stirring to obtain the bio-based itaconate rubber.
Wherein the itaconate ester monomer is selected from at least one of monomethyl itaconate, dimethyl itaconate, monoethyl itaconate, diethyl itaconate, monopropyl itaconate, dipropyl itaconate, monobutyl itaconate, dibutyl itaconate, monopentyl itaconate, dipentyl itaconate, monohexyl itaconate, dihexyl itaconate, monoeheptyl itaconate, diheptyl itaconate, monooctyl itaconate, monononyl itaconate, dinonyl itaconate, monodecanyl itaconate, didecyl itaconate, preferably at least one of dimethyl itaconate, diethyl itaconate, dipropyl itaconate, dibutyl itaconate;
the diene compound is at least one selected from butadiene and isoprene, preferably selected from butadiene;
the emulsifier is selected from disproportionated potassium rosinate and sodium stearate, and preferably the mass ratio of the disproportionated potassium rosinate to the sodium stearate is 10.1: 1 potassium disproportionated rosin acid and sodium stearate mixture;
the electrolyte is at least one of disodium ethylene diamine tetraacetate and potassium chloride;
the activating agent is at least one of ferrous sulfate and sodium formaldehyde sulfoxylate (sodium formaldehyde sulfoxylate);
the terminator is selected from hydroxylamine;
the antioxidant is selected from sodium dithionite;
the initiator is at least one of tert-butyl hydroperoxide and p-menthane hydroperoxide;
the pre-emulsification temperature is 5-25 ℃, and the pre-emulsification time is 1-4 h;
the polymerization reaction temperature is 5-10 ℃, and the polymerization reaction time is 4-8 h;
the polymerization is completed under the protection of inert gas.
Based on 100 parts by weight of itaconic acid ester, the dosage of the diene compound is 65-70 parts, the dosage of the emulsifier is 7.5-8.0 parts, the dosage of the electrolyte is 1.0-1.5 parts, the dosage of the activator is 0.1-0.5 part, the dosage of the terminator is 0.6-0.8 part, the dosage of the antioxidant is 0.01-0.05 part, and the dosage of the initiator is 0.05-0.08 part.
When the bio-based itaconate rubber gloves are prepared, the process of stirring the slurry containing the mixed bio-based itaconate rubber, a vulcanizing agent, an accelerator, potassium hydroxide and zinc oxide is a pre-vulcanization process, the pre-vulcanization can enable latex to react before dipping the gloves, the vulcanization time of the gloves in the processing process is shortened, the energy consumption is reduced, and the product performance is improved; the added zinc oxide can promote the pre-vulcanization of the itaconate rubber gloves and shorten the pre-vulcanization time. After the components are mixed to obtain slurry, the glove model which is pretreated in advance is soaked in a coagulant solution, then is taken out and dried, is soaked in the slurry, and is vulcanized and demoulded to obtain the bio-based itaconate rubber glove.
Compared with the prior art, the invention has the following advantages:
1. the invention adopts itaconate derived from bio-based resources as a comonomer to copolymerize with a diene compound to obtain itaconate latex;
2. the itaconate has wide raw material source, and can reduce the dependence on the hevea rubber tree and petrochemical energy;
3. the itaconate rubber does not contain protein, so that the allergy and shock risks in the wearing process of the gloves can be reduced;
4. the bio-based itaconate rubber glove provided by the invention has better biodegradability, is more environment-friendly and has wider application prospect.
Detailed Description
While the present invention will be described in detail with reference to the following examples, it should be understood that the following examples are illustrative of the present invention and are not to be construed as limiting the scope of the present invention.
The test instruments and test conditions used in the examples were as follows:
the glove sample was cut into a dumbbell type sample by a cutter, and the tensile strength, elongation at break, and elongation at break of the material were obtained by subjecting the sample to a tensile test using a CMT 4104 type electric tensile machine according to ASTM D412. The test tensile rate was 500 mm/min.
The raw materials and sources used in the examples are as follows:
sulfur, zinc oxide, zinc di-n-butyl dithiocarbamate (BZ), calcium carbonate water slurry (50%), white carbon black water slurry (20%), Benke latex Co., Ltd, Dongguan; potassium hydroxide, sodium hydroxide, calcium chloride, alatin; nitric acid, majoram chemical reagent plant, Tianjin.
Example 1
Preparation of itaconate latex:
respectively adding an emulsifier, deionized water, an electrolyte, an activator, an antioxidant and an itaconate monomer into a reaction kettle, then sealing the reaction device, and replacing the reaction device with nitrogen atmosphere;
adding butadiene into a reaction kettle, pre-emulsifying for one hour at 25 ℃, beginning to cool in the process, then adding an initiator, and carrying out polymerization reaction for 8 hours at 8 ℃. After the reaction is finished, a terminator is injected into the reaction kettle to obtain itaconate latex (the molar ratio of the itaconate monomer to the butadiene is 1: 3). The raw materials, amounts and sources used are listed in table 1.
TABLE 1 raw materials, amounts and sources used in example 1
Preparation of bio-based itaconate rubber gloves:
adding 0.1 part by weight of KOH, 5 parts by weight of ZnO, 1 part by weight of sulfur and 0.5 part by weight of BZ into 100 parts by weight of itaconate latex, slowly stirring at 25 ℃ for 1h, and standing for 24h to obtain slurry;
preprocessing a glove model: cleaning the glove model in a nitric acid solution with the pH value of 3, cleaning in a sodium hydroxide aqueous solution with the pH value of 12, rinsing, and drying in a 75 ℃ drying oven;
preparing a coagulant solution: adding 15 parts by weight of calcium chloride and 85 parts by weight of deionized water into a mixing barrel, and uniformly stirring to obtain a coagulant solution;
dipping the pretreated glove model in 25 ℃ coagulant solution for 5s, dripping, drying at 70 ℃, dipping in 25 ℃ slurry for 6min, dripping, drying, leaching, curling, placing in a 110 ℃ vulcanizing box, heating and vulcanizing for 30min, leaching, drying, and demolding to obtain the bio-based itaconate rubber glove. The performance tests are listed in table 4.
Example 2
Preparation of itaconate latex:
respectively adding an emulsifier, deionized water, an electrolyte, an activator, an antioxidant and an itaconate monomer into a reaction kettle, then sealing the reaction device, and replacing the reaction device with nitrogen atmosphere;
adding butadiene into a reaction kettle, pre-emulsifying for one hour at 25 ℃, beginning to cool in the process, then adding an initiator, and carrying out polymerization reaction for 8 hours at 8 ℃. After the reaction is finished, a terminator is injected into the reaction kettle to obtain itaconate latex (the molar ratio of the itaconate monomer to the butadiene is 1: 1.9). The raw materials, amounts and sources used are listed in table 2.
TABLE 2 raw materials, amounts and sources used in example 2
Preparation of bio-based itaconate rubber gloves:
adding 0.3 weight part of KOH, 7 weight parts of ZnO, 2 weight parts of sulfur and 1.5 weight parts of BZ into 100 weight parts of itaconate latex, slowly stirring for 1h at 25 ℃, adding 15 weight parts of calcium carbonate water slurry (50%), stirring for 2h, and standing for 24h to obtain slurry;
pretreating the glove model: cleaning the glove model in a nitric acid solution with the pH value of 3, cleaning in a sodium hydroxide aqueous solution with the pH value of 12, rinsing, and drying in a 75 ℃ drying oven;
preparing a coagulant solution: adding 25 parts by weight of calcium chloride and 75 parts by weight of deionized water into a mixing barrel, and uniformly stirring to obtain a coagulant solution;
dipping the pretreated glove model in 55 ℃ coagulant solution for 15s, dripping, drying at 70 ℃, dipping in 35 ℃ slurry for 5min, dripping, drying, leaching, curling, putting in a vulcanizing box at 140 ℃, heating and vulcanizing for 1h, leaching, drying and demolding to obtain the calcium carbonate/itaconate rubber glove. The performance tests are listed in table 4.
Example 3
Preparation of itaconate latex:
respectively adding an emulsifier, deionized water, an electrolyte, an activator, an antioxidant and an itaconate monomer into a reaction kettle, then sealing the reaction device, and replacing the reaction device with nitrogen atmosphere;
adding butadiene into a reaction kettle, pre-emulsifying for one hour at 25 ℃, beginning to cool in the process, then adding an initiator, and carrying out polymerization reaction for 8 hours at 8 ℃. After the reaction is finished, a terminator is injected into the reaction kettle to obtain itaconate latex (the molar ratio of the itaconate monomer to the butadiene is 1: 4.5). The raw materials, amounts and sources used are listed in table 3.
TABLE 3 raw materials, amounts and sources used in example 3
Preparation of bio-based itaconate rubber gloves:
adding 0.2 weight part of KOH, 5 weight parts of ZnO, 1 weight part of sulfur and 0.5 weight part of BZ into 100 weight parts of itaconate latex, slowly stirring at 25 ℃ for 1h, then adding 10 weight parts of white carbon black water slurry (50%), stirring for 2h, and standing for 24h to obtain slurry;
preprocessing a glove model: cleaning the glove model in a nitric acid solution with the pH value of 3, cleaning in a sodium hydroxide aqueous solution with the pH value of 12, rinsing, and drying in a 75 ℃ drying oven;
preparing a coagulant solution: adding 20 parts by weight of calcium chloride and 80 parts by weight of deionized water into a mixing barrel, and uniformly stirring to obtain a coagulant solution;
dipping the pretreated glove model in 30 ℃ coagulant solution for 10s, dripping, drying at 70 ℃, dipping in 30 ℃ slurry for 6min, dripping, drying, leaching, curling, putting in a vulcanizing box at 140 ℃, heating and vulcanizing for 1h, leaching, drying, and demolding to obtain the itaconate rubber glove. The performance tests are listed in table 4.
Comparative example 1
Adding 0.1 part by weight of KOH, 5 parts by weight of ZnO, 1 part by weight of sulfur and 0.5 part by weight of BZ into 100 parts by weight of natural latex, slowly stirring for 1h, and standing for 24h to obtain slurry;
preprocessing a glove model: cleaning the glove model in a nitric acid solution with the pH value of 3, cleaning in a sodium hydroxide aqueous solution with the pH value of 12, rinsing, and drying in a 75 ℃ drying oven;
preparing a coagulant solution: adding 15 parts by weight of calcium chloride and 85 parts by weight of deionized water into a mixing barrel, and uniformly stirring to obtain a coagulant solution;
dipping the pretreated glove model in 25 ℃ coagulant solution for 5s, dripping, drying, dipping in 25 ℃ slurry for 30s, dripping, drying, leaching, curling, placing in a 110 ℃ vulcanizing box, heating and vulcanizing for 30min, leaching, drying, and demolding to obtain the natural latex glove. The performance tests are listed in table 4.
Comparative example 2
Adding 0.1 part by weight of KOH, 5 parts by weight of ZnO, 1 part by weight of sulfur and 0.5 part by weight of BZ into 100 parts by weight of nitrile latex, slowly stirring for 1h, and standing for 24h to obtain slurry;
preprocessing a glove model: cleaning the glove model in a nitric acid solution with the pH value of 3, cleaning in a sodium hydroxide aqueous solution with the pH value of 12, rinsing, and drying in a 75 ℃ drying oven;
preparing a coagulant solution: adding 15 parts by weight of calcium chloride and 85 parts by weight of deionized water into a mixing barrel, and uniformly stirring to obtain a coagulant solution;
dipping the pretreated glove model in 25 ℃ coagulant solution for 5s, dripping, drying, dipping in 25 ℃ slurry for 30s, dripping, drying, leaching, curling, putting in a 110 ℃ vulcanizing box, heating and vulcanizing for 30min, leaching, drying, demoulding and obtaining the butyronitrile glove. The performance tests are listed in table 4.
TABLE 4 Performance test results of examples 1 to 3 and comparative examples 1 to 2
As can be seen from the performance test results of the examples 1-3 and the comparative examples 1-2, the tensile strength of the itaconate rubber gloves provided by the invention reaches more than 3.4MPa, and the elongation at break of the itaconate rubber gloves is higher than that of natural latex rubber gloves and nitrile gloves. In example 2, calcium carbonate was added to the latex, which improves the glove performance and reduces the cost, and the glove tensile strength increased to 3.5MPa, and in example 3, white carbon black was added to the latex, which reached 8.0MPa, because calcium carbonate and white carbon black were dispersed as a filler in the system, and the filler and rubber interacted, which increased the tensile strength. Therefore, the itaconate rubber glove provided by the invention has better mechanical properties and is more environment-friendly, and has a wider application prospect as a novel bio-based rubber glove.
Claims (10)
1. A bio-based itaconate rubber glove comprises a blended bio-based itaconate rubber, a vulcanizing agent and an accelerant.
2. The rubber glove of claim 1,
the vulcanizing agent is selected from sulfur; and/or the presence of a gas in the atmosphere,
the accelerator is selected from at least one of dithiocarbamates and thiazoles, preferably at least one of 2-mercaptobenzothiazole, zinc di-n-butyldithiocarbamate and zinc diethyldithiocarbamate; and/or the presence of a gas in the gas,
the rubber gloves also contain at least one of potassium hydroxide, zinc oxide and filler; and/or the presence of a gas in the atmosphere,
based on 100 parts by weight of the bio-based itaconate rubber, the usage amount of the vulcanizing agent is 0.5-5 parts, and the usage amount of the accelerator is 0.1-5 parts; preferably, the dosage of the vulcanizing agent is 1-2 parts, and the dosage of the accelerator is 0.5-1 part.
3. The rubber glove of claim 2,
based on 100 parts by weight of the bio-based itaconate rubber, the using amount of the potassium hydroxide is 0.01-1 part, the using amount of the zinc oxide is 0.5-10 parts, and the using amount of the filler is 0-20 parts; preferably, the amount of the potassium hydroxide is 0.01-1 part, the amount of the zinc oxide is 0.5-10 parts, and the amount of the filler is 0-10 parts, based on 100 parts by weight of the bio-based itaconate rubber; and/or the presence of a gas in the gas,
the filler is at least one of white carbon black, calcium carbonate and barium sulfate.
4. The rubber glove of claim 1, wherein the bio-based itaconate rubber is obtained by copolymerizing an itaconate monomer and a diene compound.
5. The rubber glove according to claim 4,
the molar ratio of the itaconate monomer to the diene compound is 1 (1-7), preferably 1 (1.9-4.5); and/or the presence of a gas in the gas,
the itaconate monomer is selected from at least one of monomethyl itaconate, dimethyl itaconate, monoethyl itaconate, diethyl itaconate, monopropyl itaconate, dipropyl itaconate, monobutyl itaconate, dibutyl itaconate, monopentyl itaconate, dipentyl itaconate, monohexyl itaconate, dihexyl itaconate, monoeeptyl itaconate, diheptyl itaconate, monooctyl itaconate, monononyl itaconate, dinonyl itaconate, monodecyl itaconate, didecyl itaconate, preferably at least one of dimethyl itaconate, diethyl itaconate, dipropyl itaconate, dibutyl itaconate; and/or the presence of a gas in the gas,
the diene compound is at least one selected from butadiene and isoprene, and is preferably selected from butadiene.
6. The preparation method of the bio-based itaconate rubber glove of any one of claims 1 to 5, comprising the following steps:
step one, uniformly stirring the components including the bio-based itaconate rubber, a vulcanizing agent and an accelerant, and standing to obtain slurry;
step two, dipping the glove model into a coagulant solution, taking out and drying;
and step three, dipping the glove model obtained after drying in the step two into the slurry obtained in the step one, and obtaining the bio-based itaconate rubber glove after vulcanization reaction and demoulding.
7. The production method according to claim 6,
at least one of potassium hydroxide, zinc oxide and filler is also added in the first step; and/or the presence of a gas in the gas,
the stirring temperature in the first step is 20-30 ℃, and the stirring time is 1-2 h; and/or the presence of a gas in the gas,
the standing time in the first step is 12-24 hours; and/or the presence of a gas in the gas,
the coagulant in the second step is selected from soluble metal salts, preferably at least one selected from calcium chloride, calcium nitrate, magnesium chloride, magnesium nitrate, zinc nitrate and zinc chloride; and/or the presence of a gas in the atmosphere,
the mass percentage concentration of the coagulant in the coagulant solution in the second step is 15-25%; and/or the presence of a gas in the gas,
the dipping temperature in the second step is 25-55 ℃, and the dipping time is 5-15 s; and/or the presence of a gas in the gas,
the drying temperature in the second step is 60-80 ℃, and the drying time is 10-30 min; and/or the presence of a gas in the gas,
before dipping, the glove model in the second step needs to be subjected to acid washing, alkali washing, rinsing and drying treatment; and/or the presence of a gas in the gas,
the dipping temperature in the third step is 25-35 ℃, and the dipping time is 1-6 min; and/or the presence of a gas in the gas,
the vulcanization reaction temperature in the third step is 110-140 ℃, and the vulcanization reaction time is 0.5-1 h; and/or the presence of a gas in the gas,
and after the vulcanization reaction in the third step, leaching, curling, cleaning and drying treatment are required.
8. The production method according to claim 7,
the solution adopted by the acid washing is at least one of nitric acid solution and hydrochloric acid solution; and/or the presence of a gas in the gas,
the pH value of the pickling solution is 3-5; and/or the presence of a gas in the gas,
the solution adopted by the alkaline washing is at least one of sodium hydroxide solution and potassium hydroxide solution; and/or the presence of a gas in the gas,
the pH value of the alkaline washing solution is 9-12.
9. The preparation method of claim 6, wherein the bio-based itaconate rubber is obtained by polymerizing components including itaconate monomers and diene compounds, and comprises the following steps:
step 1, adding deionized water, an emulsifier, an electrolyte, an activator, an antioxidant and an itaconate monomer into a reaction vessel, and uniformly mixing;
step 2, adding a diene compound into the mixture obtained in the step 1, adding an initiator after pre-emulsification, and then carrying out polymerization reaction;
and 3, after the reaction is finished, adding a terminator into the reaction container, and stirring to obtain the bio-based itaconate rubber.
10. The production method according to claim 9,
the itaconate monomer is selected from at least one of monomethyl itaconate, dimethyl itaconate, monoethyl itaconate, diethyl itaconate, monopropyl itaconate, dipropyl itaconate, monobutyl itaconate, dibutyl itaconate, monopentyl itaconate, dipentyl itaconate, monohexyl itaconate, dihexyl itaconate, monopentyl itaconate, diheptyl itaconate, monooctyl itaconate, monononyl itaconate, didecyl itaconate, preferably at least one of dimethyl itaconate, diethyl itaconate, dipropyl itaconate and dibutyl itaconate; and/or the presence of a gas in the gas,
the diene compound is at least one selected from butadiene and isoprene, preferably selected from butadiene; and/or the presence of a gas in the gas,
the emulsifier is selected from disproportionated potassium rosinate and sodium stearate; and/or the presence of a gas in the gas,
the electrolyte is at least one of disodium ethylene diamine tetraacetate and potassium chloride; and/or the presence of a gas in the gas,
the activating agent is selected from at least one of ferrous sulfate and sodium formaldehyde sulfoxylate; and/or the presence of a gas in the atmosphere,
the terminator is selected from hydroxylamine; and/or the presence of a gas in the gas,
the antioxidant is selected from sodium dithionite; and/or the presence of a gas in the gas,
the initiator is at least one of tert-butyl hydroperoxide and p-menthane hydroperoxide; and/or the presence of a gas in the gas,
the pre-emulsification temperature is 5-25 ℃, and the pre-emulsification time is 1-4 h; and/or the presence of a gas in the gas,
the polymerization reaction temperature is 5-10 ℃, and the polymerization reaction time is 4-8 h; and/or the presence of a gas in the gas,
the polymerization is completed under the protection of inert gas.
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