CN114230947A - Super-elastic wear-resistant rubber material and preparation method thereof - Google Patents
Super-elastic wear-resistant rubber material and preparation method thereof Download PDFInfo
- Publication number
- CN114230947A CN114230947A CN202210116476.6A CN202210116476A CN114230947A CN 114230947 A CN114230947 A CN 114230947A CN 202210116476 A CN202210116476 A CN 202210116476A CN 114230947 A CN114230947 A CN 114230947A
- Authority
- CN
- China
- Prior art keywords
- mixing
- polytetrafluoroethylene
- super
- rubber material
- boron nitride
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of 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 a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of 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 a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of 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 a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
Abstract
The invention discloses a super-elastic wear-resistant rubber material and a preparation method thereof. Mixing boron nitride and polytetrafluoroethylene, and then modifying with polyimide to prepare a modified boron nitride polytetrafluoroethylene compound, and mixing lignin styrene-butadiene rubber and the modified boron nitride polytetrafluoroethylene compound to prepare composite rubber; mixing vinyl crotonate and vinyl methacrylate in tert-butyl alcohol, adding ammonium perfluorooctanoate to prepare mixed emulsion, and modifying the composite rubber with the mixed emulsion to prepare the super-elastic wear-resistant rubber material. The super-elastic wear-resistant rubber material prepared by the invention has the effects of wear resistance, strong stretching, hydrophilicity and creep resistance.
Description
Technical Field
The invention relates to the technical field of new materials, in particular to a super-elastic wear-resistant rubber material and a preparation method thereof.
Background
The rubber material as a high molecular material has good chemical and physical properties, and when the rubber material is used as an elastic material, the mechanical property of the rubber material is sensitive to the influence of temperature, and particularly, the excellent mechanical property of the rubber material is greatly influenced or loses high elasticity so as to lose the use value of the rubber material at low temperature.
The rubber material prepared by the invention has the effects of wear resistance, strong stretching, hydrophilicity and creep resistance in the super-elasticity effect, can be widely applied to the fields of high and new technology, national economy and the like, can protect the environment, save energy, and can obtain larger social and economic effects, so that the preparation of the super-elasticity wear-resistant rubber material is very important.
Disclosure of Invention
The invention aims to provide a super-elastic wear-resistant rubber material and a preparation method thereof, and aims to solve the problems in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme: a super-elastic wear-resistant rubber material mainly comprises the following components in parts by weight:
60-80 parts of composite rubber, 50-70 parts of mixed emulsion and 5-8 parts of auxiliary agent.
Further, the compound rubber comprises a modified boron nitride polytetrafluoroethylene compound and lignin styrene butadiene rubber.
Furthermore, the modified boron nitride polytetrafluoroethylene composite is prepared by mixing boron nitride and polytetrafluoroethylene and then modifying with polyimide.
Furthermore, the mixed emulsion is prepared by mixing vinyl crotonate and vinyl methacrylate in tert-butyl alcohol and then adding ammonium perfluorooctanoate.
Further, the auxiliary agent is one of a high alcohol defoamer and an organic silicon defoamer.
Further, the preparation method of the super-elastic wear-resistant rubber material is characterized by mainly comprising the following preparation steps:
(1) preparing a modified boron nitride polytetrafluoroethylene compound: mixing boron nitride and polytetrafluoroethylene, and then modifying with polyimide to prepare a modified boron nitride polytetrafluoroethylene compound;
(2) preparing the composite rubber: mixing styrene-butadiene latex and lignin dispersion, dropwise adding saturated salt solution for demulsification, adding a modified boron nitride polytetrafluoroethylene complex for mixing and stirring, dropwise adding sulfuric acid for coagulation, washing and drying after complete coagulation to obtain composite rubber;
(3) preparation of mixed emulsion: mixing vinyl crotonate and vinyl methacrylate in tert-butyl alcohol, and adding ammonium perfluorooctanoate to prepare a mixed emulsion;
(4) preparing a super-elastic wear-resistant rubber material: and mixing the mixed emulsion and the composite rubber, adding a calcium chloride solution for flocculation, washing and drying after flocculation, placing the mixture in a double-roller machine for mixing, and vulcanizing and molding in a flat vulcanizing instrument to obtain the super-elastic wear-resistant rubber material.
Further, the preparation method of the modified boron nitride polytetrafluoroethylene compound in the step (1) comprises the following steps: mixing and stirring 60 mass percent of polytetrafluoroethylene dispersion liquid, 15 mass percent of pure acrylic solution and water uniformly according to the mass ratio of 5:3: 9-10: 7:18, after ultrasonic dispersion is uniform, mixing alumina, mica, alcohol ester dodeca and a defoaming agent according to the mass ratio of 2:1:1: 1-3: 1:1 to prepare an auxiliary solution, adding the auxiliary solution which is 0.3-0.4 time of the mass of the polytetrafluoroethylene dispersion liquid, continuously stirring for 30-40 min, adding boron nitride which is 0.6-0.8 time of the mass of the polytetrafluoroethylene dispersion liquid, and stirring uniformly to prepare the modified boron nitride polytetrafluoroethylene composite.
Further, the preparation method of the compounded rubber in the step (2) comprises the following steps: placing styrene-butadiene latex in a constant-temperature water bath kettle, heating to 40-50 ℃, keeping the temperature constant, uniformly stirring by using a constant-speed stirrer, adding 80% lignin dispersion liquid which is 0.5-0.7 times of the mass of the styrene-butadiene latex, continuously stirring for 20-30 min, dropwise adding saturated salt solution according to 20 drops/min for demulsification, continuously stirring for 30-40 min, adding 0.4-0.6 times of the mass of the styrene-butadiene latex of modified boron nitride polytetrafluoroethylene composite, uniformly mixing, dropwise adding 2% sulfuric acid according to 20 drops/min for coagulation, continuously stirring uniformly after complete coagulation, washing, and drying at 30-40 ℃ in a constant temperature cabinet for 1-2 h to obtain the composite rubber.
Further, the preparation method of the mixed emulsion in the step (3) comprises the following steps: uniformly mixing vinyl crotonate, vinyl methacrylate and tert-butyl alcohol according to a mass ratio of 3:3: 2-5: 5:3, adding ammonium perfluorooctanoate which is 0.2-0.3 times of the mass of the vinyl crotonate and deionized water which is 2-3 times of the mass of the vinyl crotonate into the mixture, uniformly stirring the mixture for emulsification, adding the emulsified emulsion into a reaction kettle, replacing oxygen in the reaction kettle with nitrogen to ensure that the oxygen content in the reaction kettle reaches 30%, keeping the pressure in the kettle at 2MPa, heating to 20-25 ℃ for 30-40 min, stirring at a rotating speed of 400-450 r/min, relieving pressure after stopping reaction, replacing the oxygen in the reaction kettle with nitrogen to ensure that the oxygen content in the reaction kettle reaches 30%, and discharging after 1-2 times of operation to obtain the mixed emulsion.
Further, the preparation method of the super-elastic wear-resistant rubber material in the step (4) comprises the following steps: uniformly mixing the mixed emulsion and the composite rubber according to the mass ratio of 3: 4-3: 5, adding a calcium chloride solution with the mass fraction of 1% and the mass fraction of 0.2-0.3 times of that of the composite rubber for flocculation, washing with water with the mass fraction of 2-4 times of that of the composite rubber after flocculation, drying in a blast drying oven at 40-50 ℃ for 20-24 h, placing in a double-roller machine for mixing, mixing for 20-30 min at the room temperature of 30r/min, and vulcanizing and molding in a flat vulcanizing machine at the vulcanization temperature of 140-150 ℃ for 20-30 min to obtain the super-elastic wear-resistant rubber material.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, boron nitride and polytetrafluoroethylene are mixed and then modified by polyimide to prepare a modified boron nitride polytetrafluoroethylene compound, and lignin styrene butadiene rubber and the modified boron nitride polytetrafluoroethylene compound are mixed to prepare composite rubber; mixing vinyl crotonate and vinyl methacrylate in tert-butyl alcohol, adding ammonium perfluorooctanoate to prepare mixed emulsion, and modifying the composite rubber with the mixed emulsion to prepare the super-elastic wear-resistant rubber material.
Polytetrafluoroethylene can form a cross-linked network structure with lignin styrene-butadiene rubber, boron nitride particles are dispersed and embedded in the composite rubber and can easily gather, polyimide in the modified boron nitride polytetrafluoroethylene composite has a mesh screen function in the network structure in the matrix of the composite rubber, the agglomeration of the boron nitride particles is reduced, the boron nitride particles can preferentially bear the shearing force and the vertical load of friction when in friction, so that the friction coefficient of a system is reduced, and the effect of reducing the friction is achieved, the polyimide molecular chain segment in the modified boron nitride polytetrafluoroethylene composite has stronger rigidity and can form a two-phase structure with the lignin styrene-butadiene rubber at high temperature, van der Waals force among the molecules of the modified boron nitride polytetrafluoroethylene composite can cause the interaction force between the lignin styrene-butadiene rubber and the polyimide molecules, external stress is dispersed, and the elongation at break of the lignin styrene-butadiene rubber and the polyimide is improved, make it possess good tensile properties to the two-phase structure that forms produces not equidirectional power and can also make and receive the extrusion between the polyimide molecular chain, carries on spacingly to polytetrafluoroethylene, thereby hinders the slip of polytetrafluoroethylene in compounded rubber, promotes material creep resistance ability, reinforcing material's cross-linking degree.
After the lignin styrene-butadiene rubber and the modified boron nitride polytetrafluoroethylene compound react, the lignin can generate a wavy mountain valley structure with polyimide molecules, the interaction of polyimide molecular chains among the modified boron nitride polytetrafluoroethylene compound can be reduced, the distance among the molecules is increased, the tight packing degree of the molecular chains is reduced, thereby ensuring that the molecular chain of the modified boron nitride polytetrafluoroethylene compound has considerable irregularity and flexibility, improving the mechanical property of the material, and oxygen atoms on methoxy groups and hydroxyl groups in the lignin structure can be chelated with magnesium oxide in the mixed emulsion to form a heterocyclic structure, so that the cross-linked network structure of the material is enhanced, the wear resistance of the material is improved, and the exposed chlorine atoms in the styrene butadiene rubber structure can adsorb hydroxyl groups on lignin, so that the hydroxyl groups are uniformly dispersed in the composite rubber, and the hydrophilic property of the material is improved.
When the composite rubber is subjected to heat treatment by the mixed emulsion, carbon-carbon double bonds can be introduced into a rubber molecular structure, the introduction of the double bonds is beneficial to enhancing the crosslinking activity of the composite rubber, the crosslinking capacity among molecular chains of the composite rubber is improved, the tensile strength of the composite rubber is enhanced, and the magnesium oxide is added, so that hydrogen fluoride gas generated in pyrolysis can be absorbed, the generation of bubbles on the surface of the composite rubber is reduced, the quality of a product is improved, the increase of the double bond content and the crosslinking density of the composite rubber is promoted, and the tensile strength of the material is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to more clearly illustrate the method provided by the present invention, the following examples are provided to illustrate the method for testing each index of the super elastic wear-resistant rubber material prepared in the following examples as follows:
tensile property: the super-elastic wear-resistant rubber materials prepared from the components of example 1, example 2 and comparative example 1 are subjected to tensile property test; the tensile strength of the super-elastic wear-resistant rubber material with the three components is recorded by referring to GB/T528-2009 and detecting through a universal tensile testing machine, wherein the set rotating speed is 500mm/min, and the higher the tensile strength is, the better the toughness is.
Hydrophilicity: the super-elastic wear-resistant rubber materials prepared by the components of example 1, example 2 and comparative example 2 are subjected to a hydrophilic performance test; the test is carried out at the relative humidity of 65% and the temperature of 22 ℃, the rubber material is fixed at the mouth of the beaker by a rope, the titration tip tube is 1 cm away from the mouth of the beaker, one drop of deionized water is dripped on the surface of the rubber material, a stopwatch is used for timing immediately, the time required by disappearance of mirror reflection of the water drop is recorded, 3 groups are respectively recorded, the average time of the 3 groups is calculated, and the shorter the average time is, the better the hydrophilicity is.
Example 1
A super-elastic wear-resistant rubber material mainly comprises the following components in parts by weight: 60 parts of composite rubber, 50 parts of mixed emulsion and 5 parts of auxiliary agent.
A preparation method of a super-elastic wear-resistant rubber material mainly comprises the following preparation steps:
(1) preparing a modified boron nitride polytetrafluoroethylene compound: mixing boron nitride and polytetrafluoroethylene, and then modifying with polyimide to prepare a modified boron nitride polytetrafluoroethylene compound;
(2) preparing the composite rubber: mixing styrene-butadiene latex and lignin dispersion, dropwise adding saturated salt solution for demulsification, adding a modified boron nitride polytetrafluoroethylene complex for mixing and stirring, dropwise adding sulfuric acid for coagulation, washing and drying after complete coagulation to obtain composite rubber;
(3) preparation of mixed emulsion: mixing vinyl crotonate and vinyl methacrylate in tert-butyl alcohol, and adding ammonium perfluorooctanoate to prepare a mixed emulsion;
(4) preparing a super-elastic wear-resistant rubber material: and mixing the mixed emulsion and the composite rubber, adding a calcium chloride solution for flocculation, washing and drying after flocculation, placing the mixture in a double-roller machine for mixing, and vulcanizing and molding in a flat vulcanizing instrument to obtain the super-elastic wear-resistant rubber material.
Further, the preparation method of the modified boron nitride polytetrafluoroethylene compound in the step (1) comprises the following steps: uniformly mixing and stirring 60 mass percent of polytetrafluoroethylene dispersion liquid, 15 mass percent of pure acrylic solution and water according to the mass ratio of 5:3:9, uniformly dispersing by ultrasonic waves, mixing alumina, mica, alcohol ester and a defoaming agent according to the mass ratio of 2:1:1:1 to prepare an auxiliary solution, adding the auxiliary solution which is 0.3 time of the mass of the polytetrafluoroethylene dispersion liquid, continuously stirring for 30min, adding boron nitride which is 0.6 time of the mass of the polytetrafluoroethylene dispersion liquid, and uniformly stirring to prepare the modified boron nitride polytetrafluoroethylene composite.
Further, the preparation method of the compounded rubber in the step (2) comprises the following steps: placing styrene-butadiene latex in a constant-temperature water bath kettle, heating to 40 ℃, keeping the temperature constant, uniformly stirring by using a constant-speed stirrer, adding lignin dispersion with the mass fraction of 80% and the mass fraction of 0.5 time of the styrene-butadiene latex, continuously stirring for 20min, dropwise adding saturated salt solution according to 20 drops/min for demulsification, continuously stirring for 30min, adding a modified boron nitride polytetrafluoroethylene compound with the mass fraction of 0.4-0.6 time of the styrene-butadiene latex, uniformly mixing and stirring, dropwise adding sulfuric acid with the volume fraction of 2% according to 20 drops/min for coagulation, continuously stirring uniformly after complete coagulation, washing, and drying at 30 ℃ for 1h in a constant temperature box to obtain the composite rubber.
Further, the preparation method of the mixed emulsion in the step (3) comprises the following steps: uniformly mixing vinyl crotonate, vinyl methacrylate and tert-butyl alcohol according to a mass ratio of 3:3:2, adding ammonium perfluorooctanoate accounting for 0.2 time of the mass of the vinyl crotonate and deionized water accounting for 2 times of the mass of the vinyl crotonate into the mixture, uniformly stirring the mixture for emulsification, adding the emulsified emulsion into a reaction kettle, replacing oxygen in the reaction kettle with nitrogen to ensure that the oxygen content in the reaction kettle reaches 30 percent, keeping the pressure in the kettle at 2MPa, heating the mixture to 20 ℃ for 30min, keeping the temperature at the stirring speed of 400r/min, stopping the reaction, then releasing pressure, replacing the oxygen in the reaction kettle with nitrogen to ensure that the oxygen content in the reaction kettle reaches 30 percent, discharging the mixture after 1 operation, and preparing the mixed emulsion.
Further, the preparation method of the super-elastic wear-resistant rubber material in the step (4) comprises the following steps: uniformly mixing the mixed emulsion and the composite rubber according to the mass ratio of 3:4, adding a calcium chloride solution with the mass fraction of 1% and the mass of 0.2 time of that of the composite rubber for flocculation, washing with water with the mass of 2 times of that of the composite rubber after flocculation, drying for 20 hours in a blast drying oven at 40 ℃, mixing in a double-roller machine, mixing for 20 minutes at room temperature of 30r/min, vulcanizing and forming in a flat vulcanizing instrument at the vulcanizing temperature of 140 ℃ for 20 minutes to obtain the super-elastic wear-resistant rubber material.
Example 2
A super-elastic wear-resistant rubber material mainly comprises the following components in parts by weight: 80 parts of composite rubber, 70 parts of mixed emulsion and 8 parts of auxiliary agent.
A preparation method of a super-elastic wear-resistant rubber material mainly comprises the following preparation steps:
(1) preparing a modified boron nitride polytetrafluoroethylene compound: mixing boron nitride and polytetrafluoroethylene, and then modifying with polyimide to prepare a modified boron nitride polytetrafluoroethylene compound;
(2) preparing the composite rubber: mixing styrene-butadiene latex and lignin dispersion, dropwise adding saturated salt solution for demulsification, adding a modified boron nitride polytetrafluoroethylene complex for mixing and stirring, dropwise adding sulfuric acid for coagulation, washing and drying after complete coagulation to obtain composite rubber;
(3) preparation of mixed emulsion: mixing vinyl crotonate and vinyl methacrylate in tert-butyl alcohol, and adding ammonium perfluorooctanoate to prepare a mixed emulsion;
(4) preparing a super-elastic wear-resistant rubber material: and mixing the mixed emulsion and the composite rubber, adding a calcium chloride solution for flocculation, washing and drying after flocculation, placing the mixture in a double-roller machine for mixing, and vulcanizing and molding in a flat vulcanizing instrument to obtain the super-elastic wear-resistant rubber material.
Further, the preparation method of the modified boron nitride polytetrafluoroethylene compound in the step (1) comprises the following steps: uniformly mixing and stirring 60 mass percent of polytetrafluoroethylene dispersion liquid, 15 mass percent of pure acrylic solution and water according to the mass ratio of 10:7:18, uniformly dispersing by ultrasonic waves, mixing alumina, mica, alcohol ester and a defoaming agent according to the mass ratio of 3:1:1:1 to prepare an auxiliary solution, adding the auxiliary solution which is 0.4 time of the mass of the polytetrafluoroethylene dispersion liquid, continuously stirring for 40min, adding boron nitride which is 0.8 time of the mass of the polytetrafluoroethylene dispersion liquid, and uniformly stirring to prepare the modified boron nitride polytetrafluoroethylene composite.
Further, the preparation method of the compounded rubber in the step (2) comprises the following steps: placing styrene-butadiene latex in a constant-temperature water bath kettle, heating to 50 ℃, keeping the temperature constant, uniformly stirring by using a constant-speed stirrer, adding lignin dispersion liquid with the mass fraction of 80% and the mass fraction of 0.7 time of the styrene-butadiene latex, continuously stirring for 30min, dropwise adding saturated salt solution according to 20 drops/min for demulsification, continuously stirring for 40min, adding modified boron nitride polytetrafluoroethylene composite with the mass fraction of 0.6 time of the styrene-butadiene latex, uniformly mixing, dropwise adding sulfuric acid with the volume fraction of 2% according to 20 drops/min for coagulation, continuously stirring uniformly after complete coagulation, washing, and drying at 40 ℃ in a constant temperature box for 2h to obtain the composite rubber.
Further, the preparation method of the mixed emulsion in the step (3) comprises the following steps: uniformly mixing vinyl crotonate, vinyl methacrylate and tert-butyl alcohol according to a mass ratio of 5:5:3, adding ammonium perfluorooctanoate accounting for 0.3 time of the mass of the vinyl crotonate and deionized water accounting for 3 times of the mass of the vinyl crotonate into the mixture, uniformly stirring the mixture for emulsification, adding the emulsified emulsion into a reaction kettle, replacing oxygen in the reaction kettle with nitrogen to ensure that the oxygen content in the reaction kettle reaches 30 percent, keeping the pressure in the kettle at 25 ℃ for 40min, stirring the mixture at a rotating speed of 450r/min, stopping the reaction, then releasing pressure, replacing the oxygen in the reaction kettle with nitrogen to ensure that the oxygen content in the reaction kettle reaches 30 percent, and discharging the mixture after 2 times of operation to obtain the mixed emulsion.
Further, the preparation method of the super-elastic wear-resistant rubber material in the step (4) comprises the following steps: uniformly mixing the mixed emulsion and the composite rubber according to the mass ratio of 3:5, adding a calcium chloride solution with the mass fraction of 1% and the mass of 0.3 time of that of the composite rubber for flocculation, washing with water with the mass of 4 times of that of the composite rubber after flocculation, drying for 24 hours in a forced air drying oven at 50 ℃, placing in a double-roller machine for mixing, mixing for 30 minutes at room temperature of 30r/min, and then vulcanizing and forming in a flat vulcanizing machine at the vulcanizing temperature of 150 ℃ for 30 minutes to obtain the super-elastic wear-resistant rubber material.
Comparative example 1
The formulation of comparative example 1 was the same as example 1. The preparation method of the super-elastic wear-resistant rubber material is different from that of the example 1 only in that the preparation process of the step (1) is not carried out, and the rest of the preparation steps are the same as those of the example 1.
Comparative example 2
Comparative example 2 was formulated as in example 1. The preparation method of the super-elastic wear-resistant rubber material is different from that of the example 1 only in that the preparation process of the step (3) is not carried out, and the rest of the preparation steps are the same as those of the example 1.
Effect example 1
The following table 1 shows the hydrophilic property test results of the super elastic abrasion resistant rubber materials obtained in example 1, example 2 and comparative example 1 of the present invention.
TABLE 1
| Example 1 | Example 2 | Comparative example 1 | |
| First group(s) | 3 | 2 | 7 |
| Second group(s) | 2 | 2 | 9 |
| Third group(s) | 3 | 2 | 6 |
| Mean time(s) | 2.6 | 2 | 7 |
From the above table, the hydrophilicity of the examples 1 and 2 is better, and the hydrophilicity of the comparative example 1 is poorer, which indicates that oxygen atoms on methoxy groups and hydroxyl groups in the lignin structure can be chelated with magnesium oxide in the mixed emulsion to form a heterocyclic ring structure, so that the cross-linked network structure of the material is enhanced, and the exposed chlorine atoms in the styrene-butadiene rubber structure can adsorb the hydroxyl groups on the lignin, so that the hydroxyl groups are uniformly dispersed in the composite rubber, and the hydrophilicity of the material is improved.
Effect example 2
The following table 2 shows the tensile property test results of the superelastic wear-resistant rubber materials obtained in examples 1 and 2 of the present invention and comparative example 2.
TABLE 2
| Tensile Strength (MPa) | |
| Example 1 | 88 |
| Example 2 | 87 |
| Comparative example 2 | 63 |
From the above table, the tensile strength of the example 1 and the example 2 is higher, and the comparison example 2 shows that when the composite rubber is subjected to heat treatment by the mixed emulsion, carbon-carbon double bonds can be introduced into the rubber molecular structure, the introduction of the double bonds is helpful for enhancing the crosslinking activity of the composite rubber, improving the crosslinking capacity among the molecular chains of the composite rubber and enhancing the tensile strength of the composite rubber, and the magnesium oxide is added, so that the hydrogen fluoride gas generated during pyrolysis can be absorbed, the generation of bubbles on the surface of the composite rubber is reduced, the quality of the product is improved, the increase of the double bond content and the crosslinking density of the composite rubber is promoted, and the tensile strength of the material is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The super-elastic wear-resistant rubber material is characterized by mainly comprising, by weight, 60-80 parts of composite rubber, 50-70 parts of mixed emulsion and 5-8 parts of an auxiliary agent.
2. A superelastic wear-resistant rubber material according to claim 1, wherein said composite rubber comprises modified boron nitride-polytetrafluoroethylene composite, lignin styrene-butadiene rubber.
3. A superelastic wear-resistant rubber material according to claim 2, wherein said modified boron nitride polytetrafluoroethylene composite is prepared by mixing boron nitride and polytetrafluoroethylene and then modifying with polyimide.
4. A super elastic wear resistant rubber material according to claim 3 wherein said mixed emulsion is prepared by mixing vinyl crotonate and vinyl methacrylate in t-butyl alcohol, and adding ammonium perfluorooctanoate.
5. A super elastic wear resistant rubber material according to claim 4, wherein said auxiliary agent is one of a higher alcohol defoaming agent and a silicone type defoaming agent.
6. The preparation method of the super-elastic wear-resistant rubber material is characterized by mainly comprising the following preparation steps of:
(1) preparing a modified boron nitride polytetrafluoroethylene compound: mixing boron nitride and polytetrafluoroethylene, and then modifying with polyimide to prepare a modified boron nitride polytetrafluoroethylene compound;
(2) preparing the composite rubber: mixing styrene-butadiene latex and lignin dispersion, dropwise adding saturated salt solution for demulsification, adding a modified boron nitride polytetrafluoroethylene complex for mixing and stirring, dropwise adding sulfuric acid for coagulation, washing and drying after complete coagulation to obtain composite rubber;
(3) preparation of mixed emulsion: mixing vinyl crotonate and vinyl methacrylate in tert-butyl alcohol, and adding ammonium perfluorooctanoate to prepare a mixed emulsion;
(4) preparing a super-elastic wear-resistant rubber material: and mixing the mixed emulsion and the composite rubber, adding a calcium chloride solution for flocculation, washing and drying after flocculation, placing the mixture in a double-roller machine for mixing, and vulcanizing and molding in a flat vulcanizing instrument to obtain the super-elastic wear-resistant rubber material.
7. A method for preparing a super elastic wear resistant rubber material according to claim 6, wherein the modified boron nitride polytetrafluoroethylene composite in the step (1) is prepared by the following steps: mixing and stirring 60 mass percent of polytetrafluoroethylene dispersion liquid, 15 mass percent of pure acrylic solution and water uniformly according to the mass ratio of 5:3: 9-10: 7:18, after ultrasonic dispersion is uniform, mixing alumina, mica, alcohol ester dodeca and a defoaming agent according to the mass ratio of 2:1:1: 1-3: 1:1 to prepare an auxiliary solution, adding the auxiliary solution which is 0.3-0.4 time of the mass of the polytetrafluoroethylene dispersion liquid, continuously stirring for 30-40 min, adding boron nitride which is 0.6-0.8 time of the mass of the polytetrafluoroethylene dispersion liquid, and stirring uniformly to prepare the modified boron nitride polytetrafluoroethylene composite.
8. The method for preparing a super elastic wear resistant rubber material according to claim 6, wherein the method for preparing the compounded rubber in the step (2) comprises: placing styrene-butadiene latex in a constant-temperature water bath kettle, heating to 40-50 ℃, keeping the temperature constant, uniformly stirring by using a constant-speed stirrer, adding 80% lignin dispersion liquid which is 0.5-0.7 times of the mass of the styrene-butadiene latex, continuously stirring for 20-30 min, dropwise adding saturated salt solution according to 20 drops/min for demulsification, continuously stirring for 30-40 min, adding 0.4-0.6 times of the mass of the styrene-butadiene latex of modified boron nitride polytetrafluoroethylene composite, uniformly mixing, dropwise adding 2% sulfuric acid according to 20 drops/min for coagulation, continuously stirring uniformly after complete coagulation, washing, and drying at 30-40 ℃ in a constant temperature cabinet for 1-2 h to obtain the composite rubber.
9. The method for preparing a super elastic wear resistant rubber material according to claim 6, wherein the method for preparing the mixed emulsion in the step (3) comprises: uniformly mixing vinyl crotonate, vinyl methacrylate and tert-butyl alcohol according to a mass ratio of 3:3: 2-5: 5:3, adding ammonium perfluorooctanoate which is 0.2-0.3 times of the mass of the vinyl crotonate and deionized water which is 2-3 times of the mass of the vinyl crotonate into the mixture, uniformly stirring the mixture for emulsification, adding the emulsified emulsion into a reaction kettle, replacing oxygen in the reaction kettle with nitrogen to ensure that the oxygen content in the reaction kettle reaches 30%, keeping the pressure in the kettle at 2MPa, heating to 20-25 ℃ for 30-40 min, stirring at a rotating speed of 400-450 r/min, relieving pressure after stopping reaction, replacing the oxygen in the reaction kettle with nitrogen to ensure that the oxygen content in the reaction kettle reaches 30%, and discharging after 1-2 times of operation to obtain the mixed emulsion.
10. The method for preparing a super-elastic wear-resistant rubber material according to claim 6, wherein the method for preparing the super-elastic wear-resistant rubber material in the step (4) comprises the following steps: uniformly mixing the mixed emulsion and the composite rubber according to the mass ratio of 3: 4-3: 5, adding a calcium chloride solution with the mass fraction of 1% and the mass fraction of 0.2-0.3 times of that of the composite rubber for flocculation, washing with water with the mass fraction of 2-4 times of that of the composite rubber after flocculation, drying in a blast drying oven at 40-50 ℃ for 20-24 h, placing in a double-roller machine for mixing, mixing for 20-30 min at the room temperature of 30r/min, and vulcanizing and molding in a flat vulcanizing machine at the vulcanization temperature of 140-150 ℃ for 20-30 min to obtain the super-elastic wear-resistant rubber material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210116476.6A CN114230947A (en) | 2022-02-07 | 2022-02-07 | Super-elastic wear-resistant rubber material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210116476.6A CN114230947A (en) | 2022-02-07 | 2022-02-07 | Super-elastic wear-resistant rubber material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114230947A true CN114230947A (en) | 2022-03-25 |
Family
ID=80747528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210116476.6A Pending CN114230947A (en) | 2022-02-07 | 2022-02-07 | Super-elastic wear-resistant rubber material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114230947A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319898A (en) * | 2013-06-24 | 2013-09-25 | 北京化工大学 | Micro-nano lamellar boron nitride/rubber composite material and preparation method thereof |
| CN106117675A (en) * | 2016-07-01 | 2016-11-16 | 西北师范大学 | A kind of preparation method of silane coupler modified lignin reinforcing emulsion polymerized styrene butadiene rubber |
| CN107266741A (en) * | 2016-04-08 | 2017-10-20 | 中国石油天然气股份有限公司 | Rubber composition for tire tread and preparation method thereof |
| CN113431940A (en) * | 2021-08-04 | 2021-09-24 | 杭州普昌科技有限公司 | Fluorine-lined corrosion-resistant self-supporting regulating valve |
| CN113583316A (en) * | 2021-08-27 | 2021-11-02 | 刘辉 | Waterproof and anti-pollution rubber material and preparation method thereof |
-
2022
- 2022-02-07 CN CN202210116476.6A patent/CN114230947A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103319898A (en) * | 2013-06-24 | 2013-09-25 | 北京化工大学 | Micro-nano lamellar boron nitride/rubber composite material and preparation method thereof |
| CN107266741A (en) * | 2016-04-08 | 2017-10-20 | 中国石油天然气股份有限公司 | Rubber composition for tire tread and preparation method thereof |
| CN106117675A (en) * | 2016-07-01 | 2016-11-16 | 西北师范大学 | A kind of preparation method of silane coupler modified lignin reinforcing emulsion polymerized styrene butadiene rubber |
| CN113431940A (en) * | 2021-08-04 | 2021-09-24 | 杭州普昌科技有限公司 | Fluorine-lined corrosion-resistant self-supporting regulating valve |
| CN113583316A (en) * | 2021-08-27 | 2021-11-02 | 刘辉 | Waterproof and anti-pollution rubber material and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| GWI-TAEK JEONG 等: "Enzymatic synthesis of sorbitan methacrylate: Comparison of methacrylic acid and vinyl methacrylate", 《BIOCHEMICAL ENGINEERING JOURNAL》 * |
| ZHAO-YU WANG 等: "Efficient Regioselective Synthesis of the Crotonyl Polydatin Prodrug by Thermomyces lanuginosus Lipase: a Kinetics Study in Eco-friendly 2-Methyltetrahydrofuran", 《APPL BIOCHEM BIOTECHNOL》 * |
| 燕鹏华 等: "聚四氟乙烯改性乳聚丁苯橡胶性能研究", 《弹性体》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112159497A (en) | Preparation method of fluorine-silicon modified butyronitrile latex applied to medical butyronitrile gloves | |
| CN115960424A (en) | Flexible fire-resistant robot cable | |
| CN114230947A (en) | Super-elastic wear-resistant rubber material and preparation method thereof | |
| CN113845814A (en) | Heat-resistant silicon dioxide modified phenolic resin high-strength coating and preparation method thereof | |
| CN116554700B (en) | Low-temperature high-viscosity modified asphalt and processing technology thereof | |
| CN112457539A (en) | Preparation method of high-tensile-strength corrosion-resistant rubber lining material | |
| CN110951115B (en) | Surface grafting modified alumina for epoxy composite insulating material and epoxy composite insulating material | |
| CN113980355B (en) | Multifunctional rubber additive and preparation method thereof | |
| CN115386148A (en) | Natural medical rubber gloves and preparation method thereof | |
| CN112745476B (en) | Graphene modified polyurethane resin material with high thermal stability and preparation method thereof | |
| CN115521406A (en) | Rubber composition containing graft modified natural rubber and preparation method thereof | |
| CN114773660A (en) | Porous ultrahigh molecular weight fluorinated polyolefin hollow microsphere and preparation method thereof | |
| CN113980566A (en) | Polyacrylate functionalized graphene modified polyurethane composite coating and preparation method thereof | |
| CN109553775B (en) | Anti-tear auxiliary agent for silicone rubber and preparation method thereof | |
| CN113737310A (en) | Graphene polyimide composite fiber and preparation method thereof | |
| CN115703904A (en) | High-heat-resistance polyethylene pipe composition and preparation method thereof | |
| CN110117383A (en) | A kind of high-strength gel elastomeric material | |
| CN114933748B (en) | High-tear-resistance flame-retardant hydrogenated nitrile rubber composition for aviation and preparation method thereof | |
| CN114874496B (en) | High-strength low-curing shrinkage silicone rubber and preparation method thereof | |
| CN111171400B (en) | Rubber composition resisting hot oil aging and preparation method thereof | |
| CN113429606B (en) | Polymer waterproof coiled material and preparation method and application thereof | |
| CN114106255B (en) | Preparation method of nickel butadiene rubber | |
| CN110734613B (en) | Nitroso-fluoro rubber composition and application thereof | |
| CN109161366B (en) | Star-shaped nano glue for underwater repair and preparation method thereof | |
| CN117567799A (en) | Rubber composition containing SSBR and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |