CN112143211A - Air pressure resistant TPU composite material and preparation method thereof - Google Patents
Air pressure resistant TPU composite material and preparation method thereof Download PDFInfo
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- CN112143211A CN112143211A CN202010986184.9A CN202010986184A CN112143211A CN 112143211 A CN112143211 A CN 112143211A CN 202010986184 A CN202010986184 A CN 202010986184A CN 112143211 A CN112143211 A CN 112143211A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
- C08L75/06—Polyurethanes from polyesters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2201/14—Gas barrier composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
The invention provides an air pressure resistant TPU composite material and a preparation method thereof. The TPU composite material comprises the following components in parts by weight: 100 parts of polyurethane elastomer, 15-25 parts of polyurethane acrylate copolymer, 30-50 parts of ethylene-acrylate copolymer, 10-20 parts of bamboo charcoal fiber, 5-10 parts of lamellar inorganic filler, 1-3 parts of silane coupling agent, 1-2 parts of crosslinking agent and 1-2 parts of auxiliary crosslinking agent. The TPU composite material is prepared by mixing and reacting bamboo charcoal fiber, lamellar inorganic filler and silane coupling agent, then mixing and banburying polymer components, and finally melting, blending and extruding the components through an extruder. The TPU composite material provided by the invention has higher gas barrier property, tensile strength, puncture resistance and air pressure resistance, and can be used as an inflatable liner material.
Description
Technical Field
The invention belongs to the technical field of polyurethane materials, and particularly relates to an air pressure resistant TPU composite material and a preparation method thereof.
Background
Thermoplastic polyurethane elastomer (TPU) is a high molecular synthetic material with excellent properties, and it contains both hard segment formed by isocyanate and soft segment structure formed by polyol, so it has the elasticity of rubber and the hardness of plastic, and also has good mechanical properties, wear resistance and resilience, and is widely used in the fields of conveyor belts, hoses, automobile parts, shoe soles, synthetic leather, paints, electric wires and cables, etc.
TPU materials are used in a wide variety of applications, often with very different properties, often requiring the design of specific molecular structures depending on the application.
Inflatable products, such as air mattresses, air boats, tires, and the like, each have at least one air tube. The high-pressure gas is injected into the inflatable inner tube, so that the inner tube can form a specific shape, and the effects of reducing the weight of a product and buffering external impact are achieved. Materials for use as pneumatic tubes are generally required to have the following properties: has higher gas barrier performance to reduce the seepage rate of internal high-pressure gas; the material has high tensile strength and can bear the pressure of internal gas (including initial inflation pressure and pressure generated by bearing); the puncture-resistant tire has higher puncture-resistant strength, and the air leakage of the inner tube due to puncture is prevented; has high toughness and elasticity, and can buffer external impact through deformation.
TPU has excellent flexibility and elasticity, so that TPU is an ideal material for an inflatable inner tube. However, a TPU material alone has low gas barrier properties, is likely to cause pressure drop due to gas permeation, has high flexibility and insufficient strength, and may not withstand high gas pressure and puncture by hard objects.
Therefore, modification of the TPU material is needed to improve the gas barrier property, tensile strength, puncture resistance and pressure resistance of the TPU material so as to meet the application requirements of various inflatable inner tubes.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an air pressure resistant TPU composite material and a preparation method thereof. The TPU composite material has high gas barrier performance, tensile strength, puncture resistance and air pressure resistance, and can be used as an inflatable liner material.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides an air pressure resistant TPU composite material, which comprises the following components in parts by weight:
in the invention, the ethylene-acrylate copolymer has good gas barrier effect and is beneficial to improving the strength of the composite material; the polyurethane acrylate copolymer can improve the strength of the composite material on one hand, and can also serve as a compatilizer to improve the compatibility of the polyurethane elastomer and the ethylene-acrylate copolymer on the other hand; the bamboo charcoal fiber can improve the strength of the composite material, the lamellar inorganic filler is beneficial to improving the gas barrier performance of the composite material, and the cross-linking agent and the auxiliary cross-linking agent can enable all the components to be cross-linked to a certain degree, so that the overall strength of the composite material is improved. According to the invention, the components are matched with each other at a specific ratio, so that the air pressure resistant TPU composite material with high air barrier property, tensile strength and puncture resistance is obtained.
In the invention, the weight portion of the polyurethane acrylate copolymer is 15-25; for example, it may be 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, or the like.
If the amount of the urethane acrylate copolymer is too small, the polyurethane elastomer and the ethylene-acrylate copolymer are likely to be separated from each other, and the strength of the composite material is reduced.
The weight portion of the ethylene-acrylate copolymer is 30-50 portions; for example, it may be 30 parts, 32 parts, 33 parts, 35 parts, 36 parts, 38 parts, 40 parts, 42 parts, 43 parts, 45 parts, 46 parts, 48 parts, or 50 parts, etc.
If the amount of the ethylene-acrylate copolymer used is too small, the gas barrier properties and strength of the composite material tend to be deteriorated; if the amount of the ethylene-acrylate copolymer is too large, phase separation with the polyurethane elastomer tends to occur, which also results in a decrease in gas barrier properties and strength of the composite.
The weight parts of the bamboo charcoal fiber are 10-20 parts; for example, it may be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, or the like.
The bamboo charcoal fiber has the function of improving the strength of the composite material, and if the using amount of the bamboo charcoal fiber is too small, the strength of the composite material is reduced; if the amount of the additive is too much, the composite material is hard and has insufficient elasticity, so that the composite material is not suitable for practical application.
5-10 parts of lamellar inorganic filler; for example, it may be 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts, 8.5 parts, 9 parts, 9.5 parts, 10 parts, or the like.
The lamellar inorganic filler contributes to the improvement of the gas barrier property of the composite material, and if the amount is too small, the gas barrier property of the composite material is reduced; if the amount is too large, the strength of the composite material is likely to be reduced due to poor compatibility between the inorganic filler and the polymer base material.
1-3 parts of the silane coupling agent; for example, it may be 1 part, 1.2 parts, 1.5 parts, 1.8 parts, 2 parts, 2.2 parts, 2.5 parts, 2.8 parts, 3 parts or the like.
The weight portion of the cross-linking agent is 1-2; for example, it may be 1 part, 1.2 parts, 1.3 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts or the like.
The weight portion of the assistant crosslinking agent is 1-2; for example, it may be 1 part, 1.2 parts, 1.3 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts or the like.
The cross-linking agent and the auxiliary cross-linking agent can enable all the components to be cross-linked to a certain degree, and if the dosage of the cross-linking agent and the auxiliary cross-linking agent is too small, the strength of the composite material is reduced; if the amount of the two is too much, the composite material is excessively crosslinked, the material is hard, the elasticity is reduced, and the composite material is not suitable for practical application.
The following is a preferred technical solution of the present invention, but not a limitation to the technical solution provided by the present invention, and the object and advantageous effects of the present invention can be better achieved and achieved by the following preferred technical solution.
In a preferred embodiment of the present invention, the polyurethane elastomer is a polyester polyurethane elastomer.
The strength of the polyether polyurethane elastomer is lower than that of the polyester polyurethane elastomer, and the water vapor permeability of the composite material is easily increased by the action of hydrogen bonds in the polyether chain segment, so the polyester polyurethane elastomer is preferably used as the polyurethane elastomer in the invention.
Preferably, the weight average molecular weight of the urethane acrylate copolymer is 5000-10000; for example, 5000, 6000, 7000, 8000, 9000, 10000, etc. may be used.
As a preferred embodiment of the present invention, the weight average molecular weight of the ethylene-acrylate copolymer is 5000-15000; for example, 5000, 6000, 7000, 8000, 9000, 10000, 11000, 12000, 13000, 14000, 15000, or the like may be used.
Preferably, the ethylene-acrylate copolymer has a mole percentage of ethylene units of 50-70%; for example, it may be 50%, 52%, 55%, 58%, 60%, 62%, 65%, 68%, 70%, etc.
As a preferable technical scheme of the invention, the diameter of the bamboo charcoal fiber is 0.5-2 μm; for example, it may be 0.5. mu.m, 0.8. mu.m, 1. mu.m, 1.2. mu.m, 1.5. mu.m, 1.8. mu.m, 2 μm or the like.
Preferably, the length of the bamboo charcoal fiber is 10-30 μm; for example, it may be 10 μm, 12 μm, 15 μm, 18 μm, 20 μm, 22 μm, 25 μm, 28 μm or 30 μm.
In a preferred embodiment of the present invention, the lamellar inorganic filler is one or a combination of at least two selected from graphene oxide, montmorillonite and mica.
Preferably, the particle size of the lamellar inorganic filler is 50 to 200 nm; for example, it may be 50nm, 55nm, 60nm, 65nm, 70nm, 75nm, 80nm, 85nm, 90nm, 95nm, 100nm, 110nm, 120nm, 130nm, 140nm, 150nm, 160nm, 170nm, 180nm, 190nm or 200 nm.
In a preferred embodiment of the present invention, the silane coupling agent is selected from one or a combination of at least two of isocyanatopropyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, (methacryloyloxy) propyltrimethoxysilane.
As a preferred technical scheme of the invention, the crosslinking agent is dicumyl peroxide and/or di-tert-butyl cumyl peroxide.
Preferably, the co-crosslinking agent is triallyl isocyanurate.
In a second aspect, the present invention provides a method of making the TPU composite of the first aspect, the method comprising the steps of:
(1) mixing bamboo charcoal fiber, lamellar inorganic filler and silane coupling agent for reaction to obtain a first mixed material;
(2) adding the first mixed material obtained in the step (1), a polyurethane elastomer, a polyurethane acrylate copolymer and an ethylene-acrylate copolymer into an internal mixer for internal mixing to obtain a second mixed material;
(3) and (3) adding the second mixed material obtained in the step (2), a cross-linking agent and an auxiliary cross-linking agent into an extruder, and carrying out melt blending extrusion to obtain the TPU composite material.
As a preferred embodiment of the present invention, the mixing in step (1) is carried out in a high-speed mixer.
Preferably, the rotating speed of the high-speed mixer is 300-500 r/min; for example, it may be 300r/min, 320r/min, 350r/min, 380r/min, 400r/min, 420r/min, 450r/min, 480r/min, or 500 r/min.
Preferably, the temperature of the mixing in step (1) is 80-100 ℃, for example, 80 ℃, 82 ℃, 85 ℃, 88 ℃, 90 ℃, 92 ℃, 95 ℃, 98 ℃ or 100 ℃ and the like; the time is 5-10min, such as 5min, 6min, 7min, 8min, 9min or 10 min.
Preferably, the banburying temperature in the step (2) is 110-; the time is 10-20min, such as 10min, 11min, 12min, 13min, 14min, 15min, 6min, 17min, 18min, 19min or 20 min.
Preferably, the temperature of the extrusion section of the extruder in the step (3) is 170-190 ℃; for example, the temperature may be 170 ℃, 172 ℃, 175 ℃, 178 ℃, 180 ℃, 182 ℃, 185 ℃, 188 ℃, 190 ℃ or the like.
Preferably, the material retention time of the extruder in the step (3) is 1-3 min; for example, it may be 1min, 1.2min, 1.5min, 1.8min, 2min, 2.2min, 2.5min, 2.8min or 3 min.
As a preferred technical scheme of the invention, the preparation method comprises the following steps:
(1) adding the bamboo charcoal fiber, the lamellar inorganic filler and the silane coupling agent into a high-speed mixer, and carrying out mixing reaction for 5-10min at the rotating speed of 300-500r/min and the temperature of 80-100 ℃ to obtain a first mixed material;
(2) adding the first mixed material obtained in the step (1), a polyurethane elastomer, a polyurethane acrylate copolymer and an ethylene-acrylate copolymer into an internal mixer, and internally mixing for 10-20min at 110-120 ℃ to obtain a second mixed material;
(3) and (3) adding the second mixed material obtained in the step (2), a cross-linking agent and an auxiliary cross-linking agent into an extruder, controlling the temperature of an extrusion section of the extruder to be 170-190 ℃, keeping the material retention time to be 1-3min, and carrying out melt blending extrusion to obtain the TPU composite material.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the components are matched with each other at a specific ratio to prepare the air pressure resistant TPU composite material with high air barrier property, tensile strength and puncture resistance. The oxygen transmission rate is 15-24cm3/m2D.atm, tensile strength of 63-70MPa, elongation at break of 330-.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
The sources of the raw materials used in the examples of the present invention are as follows:
polyester polyurethane elastomer: B98A, basf, germany;
urethane acrylate copolymer: DR-U301 of Taiwan Yangxing chemical;
ethylene-acrylic ester copolymer: 1913AC of DuPont, USA.
Example 1
The embodiment provides an air pressure resistant TPU composite material, which comprises the following components in parts by weight:
wherein the average diameter of the bamboo charcoal fiber is 1 μm, and the length is 20 μm; the lamellar inorganic filler is graphene oxide, and the particle size of D50 is 200 nm; the silane coupling agent is isocyanate propyl trimethoxy silane, the cross-linking agent is dicumyl peroxide, and the auxiliary cross-linking agent is triallyl isocyanurate.
The preparation method of the air pressure resistant TPU composite material comprises the following steps:
(1) adding the bamboo charcoal fiber, the lamellar inorganic filler and the silane coupling agent into a high-speed mixer, and mixing and reacting for 5min at the rotating speed of 300r/min and the temperature of 100 ℃ to obtain a first mixed material;
(2) adding the first mixed material obtained in the step (1), a polyurethane elastomer, a polyurethane acrylate copolymer and an ethylene-acrylate copolymer into an internal mixer, and internally mixing for 20min at 110 ℃ to obtain a second mixed material;
(3) and (3) adding the second mixed material obtained in the step (2), a cross-linking agent and an auxiliary cross-linking agent into an extruder, controlling the temperature of an extrusion section of the extruder to be 170 ℃, keeping the material retention time for 3min, and carrying out melt blending extrusion to obtain the TPU composite material.
Example 2
The embodiment provides an air pressure resistant TPU composite material, which comprises the following components in parts by weight:
wherein the average diameter of the bamboo charcoal fiber is 1 μm, and the length is 20 μm; the lamellar inorganic filler is montmorillonite, and the particle size of D50 is 100 nm; the silane coupling agent is vinyl trimethoxy silane, the crosslinking agent is di-tert-butyl peroxyisopropyl benzene, and the auxiliary crosslinking agent is triallyl isocyanurate.
The preparation method of the air pressure resistant TPU composite material comprises the following steps:
(1) adding the bamboo charcoal fiber, the lamellar inorganic filler and the silane coupling agent into a high-speed mixer, and mixing and reacting for 10min at the rotation speed of 500r/min and the temperature of 80 ℃ to obtain a first mixed material;
(2) adding the first mixed material obtained in the step (1), a polyurethane elastomer, a polyurethane acrylate copolymer and an ethylene-acrylate copolymer into an internal mixer, and internally mixing for 10min at 120 ℃ to obtain a second mixed material;
(3) and (3) adding the second mixed material obtained in the step (2), a cross-linking agent and an auxiliary cross-linking agent into an extruder, controlling the temperature of an extrusion section of the extruder to be 190 ℃ and the retention time of the materials to be 1min, and carrying out melt blending extrusion to obtain the TPU composite material.
Example 3
The embodiment provides an air pressure resistant TPU composite material, which comprises the following components in parts by weight:
wherein the average diameter of the bamboo charcoal fiber is 1 μm, and the length is 20 μm; the lamellar inorganic filler is mica, and the particle size of D50 is 65 nm; the silane coupling agent is (methacryloyloxy) propyl trimethoxy silane, the crosslinking agent is dicumyl peroxide, and the auxiliary crosslinking agent is triallyl isocyanurate.
The preparation method of the air pressure resistant TPU composite material comprises the following steps:
(1) adding the bamboo charcoal fiber, the lamellar inorganic filler and the silane coupling agent into a high-speed mixer, and mixing and reacting for 8min at the rotating speed of 400r/min and the temperature of 80-100 ℃ to obtain a first mixed material;
(2) adding the first mixed material obtained in the step (1), a polyurethane elastomer, a polyurethane acrylate copolymer and an ethylene-acrylate copolymer into an internal mixer, and internally mixing for 15min at 115 ℃ to obtain a second mixed material;
(3) and (3) adding the second mixed material obtained in the step (2), a cross-linking agent and an auxiliary cross-linking agent into an extruder, controlling the temperature of an extrusion section of the extruder to be 180 ℃, keeping the material retention time for 2min, and carrying out melt blending extrusion to obtain the TPU composite material.
Example 4
The embodiment provides an air pressure resistant TPU composite material, which comprises the following components in parts by weight:
wherein the average diameter of the bamboo charcoal fiber is 1 μm, and the length is 20 μm; the lamellar inorganic filler is graphene oxide, and the particle size of D50 is 200 nm; the silane coupling agent is vinyl triethoxysilane, the crosslinking agent is di-tert-butyl peroxyisopropyl benzene, and the auxiliary crosslinking agent is triallyl isocyanurate.
The preparation method of the air pressure resistant TPU composite material comprises the following steps:
(1) adding the bamboo charcoal fiber, the lamellar inorganic filler and the silane coupling agent into a high-speed mixer, and mixing and reacting for 8min at the rotating speed of 350r/min and the temperature of 100 ℃ to obtain a first mixed material;
(2) adding the first mixed material obtained in the step (1), a polyurethane elastomer, a polyurethane acrylate copolymer and an ethylene-acrylate copolymer into an internal mixer, and internally mixing for 15min at 115 ℃ to obtain a second mixed material;
(3) and (3) adding the second mixed material obtained in the step (2), a cross-linking agent and an auxiliary cross-linking agent into an extruder, controlling the temperature of an extrusion section of the extruder to be 185 ℃, keeping the material retention time to be 1.5min, and carrying out melt blending extrusion to obtain the TPU composite material.
Example 5
The embodiment provides an air pressure resistant TPU composite material, which comprises the following components in parts by weight:
wherein the average diameter of the bamboo charcoal fiber is 1 μm, and the length is 20 μm; the lamellar inorganic filler is graphene oxide, and the particle size of D50 is 200 nm; the silane coupling agent is (methacryloyloxy) propyl trimethoxy silane, the crosslinking agent is dicumyl peroxide, and the auxiliary crosslinking agent is triallyl isocyanurate.
The preparation method of the air pressure resistant TPU composite material comprises the following steps:
(1) adding the bamboo charcoal fiber, the lamellar inorganic filler and the silane coupling agent into a high-speed mixer, and mixing and reacting for 10min at the rotation speed of 400r/min and the temperature of 80 ℃ to obtain a first mixed material;
(2) adding the first mixed material obtained in the step (1), a polyurethane elastomer, a polyurethane acrylate copolymer and an ethylene-acrylate copolymer into an internal mixer, and internally mixing for 13min at 120 ℃ to obtain a second mixed material;
(3) and (3) adding the second mixed material obtained in the step (2), a cross-linking agent and an auxiliary cross-linking agent into an extruder, controlling the temperature of an extrusion section of the extruder to be 175 ℃, keeping the material retention time to be 2.5min, and carrying out melt blending extrusion to obtain the TPU composite material.
Comparative example 1
A TPU composite is provided which differs from example 1 in that the urethane acrylate copolymer is present in 10 parts by weight.
Comparative example 2
A TPU composite is provided which differs from example 2 in that the urethane acrylate copolymer is present in 30 parts by weight.
Comparative example 3
A TPU composite is provided which differs from example 1 in that the ethylene acrylate copolymer is present in an amount of 60 parts by weight.
Comparative example 4
A TPU composite is provided which differs from example 2 in that the ethylene acrylate copolymer is present in 20 parts by weight.
Comparative example 5
The TPU composite material is different from the TPU composite material in example 1 in that the bamboo charcoal fiber is 5 parts by weight.
Comparative example 6
The TPU composite material is different from the TPU composite material in example 2 in that the weight part of the bamboo charcoal fiber is 30 parts.
Comparative example 7
The TPU composite material is different from the TPU composite material in example 1 in that the graphene oxide is 15 parts by weight.
Comparative example 8
A TPU composite is provided which differs from example 2 in that the weight fraction of montmorillonite is 2 parts.
The properties of the TPU composites provided in the above examples and comparative examples were tested as follows:
tensile strength and elongation at break: tested according to the method of GB/T528-2009;
oxygen transmission rate: testing according to the method of GB/T1038-2000;
puncture resistance strength: the force required for puncturing a TPU composite film with the thickness of 1mm under the conditions that the diameter of a needle is 1mm and the propelling speed is 50mm/min is measured according to the method of GB/T10004-2008.
The results of the above performance tests are shown in table 1 below:
TABLE 1
As can be seen from the performance data in Table 1, the TPU composite material provided by the invention has high gas barrier performance, tensile strength, puncture resistance and high air pressure resistance, and can be used as an inflatable liner material.
Compared with example 1, the polyurethane acrylate copolymer in comparative example 1 is too small in dosage, so that the polyurethane elastomer and the ethylene-acrylate copolymer are subjected to phase separation, and the strength of the composite material is reduced; in comparative example 2, the amount of the urethane acrylate copolymer used was too large compared to example 2, and the gas barrier property of the composite material was decreased.
Compared with example 1, the ethylene-acrylate copolymer in comparative example 3 is too much in amount and easily phase-separated from the polyurethane elastomer, resulting in a decrease in gas barrier property and strength of the composite material; in comparative example 4, the gas barrier property and strength of the composite material were lowered by using too small an amount of the ethylene-acrylate copolymer as compared with example 2.
Compared with the example 1, the bamboo charcoal fiber in the comparative example 5 has too little dosage, so that the strength of the composite material is greatly reduced; compared with example 2, in comparative example 6, the amount of the bamboo charcoal fiber copolymer is too much, and although the strength of the composite material is improved, the composite material is hard, insufficient in elasticity and low in elongation at break, and is not suitable for practical application.
Compared with example 1, in comparative example 7, the amount of graphene oxide is too much, agglomeration is easy to occur, and the continuity of the polymer matrix is affected, so that the strength of the composite material is reduced; in comparative example 8, the amount of graphene oxide used was too small compared to example 2, and the gas barrier properties of the composite material were greatly reduced.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (10)
1. The pressure-resistant TPU composite material is characterized by comprising the following components in parts by weight:
2. the TPU composite of claim 1 wherein the polyurethane elastomer is a polyester polyurethane elastomer;
preferably, the weight average molecular weight of the urethane acrylate copolymer is 5000-10000.
3. The TPU composite of claim 1 or 2 wherein the weight average molecular weight of the ethylene acrylate copolymer is 5000-15000;
preferably, the ethylene-acrylate copolymer has a mole percentage of ethylene units of 50 to 70%.
4. The TPU composite of any of claims 1-3 wherein the bamboo carbon fibers have a diameter of 0.5 to 2 μ ι η;
preferably, the length of the bamboo charcoal fiber is 10-30 μm.
5. The TPU composite of any of claims 1 to 4, wherein the platelet-like inorganic filler is selected from one or a combination of at least two of graphene oxide, montmorillonite, mica;
preferably, the lamellar inorganic filler has a particle size of 50 to 200 nm.
6. The TPU composite of any of claims 1 to 5, wherein the silane coupling agent is selected from one or a combination of at least two of isocyanatopropyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, (methacryloyloxy) propyltrimethoxysilane.
7. The TPU composite of any of claims 1 to 6, wherein the crosslinking agent is dicumyl peroxide and/or di-t-butyl-cumyl peroxide;
preferably, the co-crosslinking agent is triallyl isocyanurate.
8. A process for preparing the TPU composite of any of claims 1 to 7, wherein the process comprises the steps of:
(1) mixing bamboo charcoal fiber, lamellar inorganic filler and silane coupling agent for reaction to obtain a first mixed material;
(2) adding the first mixed material obtained in the step (1), a polyurethane elastomer, a polyurethane acrylate copolymer and an ethylene-acrylate copolymer into an internal mixer for internal mixing to obtain a second mixed material;
(3) and (3) adding the second mixed material obtained in the step (2), a cross-linking agent and an auxiliary cross-linking agent into an extruder, and carrying out melt blending extrusion to obtain the TPU composite material.
9. The method according to claim 8, wherein the mixing in step (1) is carried out in a high-speed mixer;
preferably, the rotating speed of the high-speed mixer is 300-500 r/min;
preferably, the temperature of the mixing in the step (1) is 80-100 ℃, and the time is 5-10 min;
preferably, the banburying temperature in the step (2) is 110-120 ℃, and the time is 10-20 min;
preferably, the temperature of the extrusion section of the extruder in the step (3) is 170-190 ℃;
preferably, the material retention time of the extruder in step (3) is 1-3 min.
10. The method of manufacturing according to claim 8 or 9, comprising the steps of:
(1) adding the bamboo charcoal fiber, the lamellar inorganic filler and the silane coupling agent into a high-speed mixer, and carrying out mixing reaction for 5-10min at the rotating speed of 300-500r/min and the temperature of 80-100 ℃ to obtain a first mixed material;
(2) adding the first mixed material obtained in the step (1), a polyurethane elastomer, a polyurethane acrylate copolymer and an ethylene-acrylate copolymer into an internal mixer, and internally mixing for 10-20min at 110-120 ℃ to obtain a second mixed material;
(3) and (3) adding the second mixed material obtained in the step (2), a cross-linking agent and an auxiliary cross-linking agent into an extruder, controlling the temperature of an extrusion section of the extruder to be 170-190 ℃, keeping the material retention time to be 1-3min, and carrying out melt blending extrusion to obtain the TPU composite material.
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| PCT/CN2020/140453 WO2022057144A1 (en) | 2020-09-18 | 2020-12-29 | Air pressure-resistant tpu composite material and preparation method therefor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113444356A (en) * | 2021-07-22 | 2021-09-28 | 浙江戈美其鞋业有限公司 | Corrosion-resistant tear-resistant sole material, preparation method thereof and sports shoes |
| CN114013113A (en) * | 2021-11-04 | 2022-02-08 | 浙江同正管道技术有限公司 | High-temperature-resistant PVC composite mute drainage pipe and preparation method thereof |
| EP4389813A1 (en) | 2022-12-22 | 2024-06-26 | Made of Air GmbH | Shaped objects based on modified biochar and a polymer and methods for producing them |
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| CN113444356A (en) * | 2021-07-22 | 2021-09-28 | 浙江戈美其鞋业有限公司 | Corrosion-resistant tear-resistant sole material, preparation method thereof and sports shoes |
| CN114013113A (en) * | 2021-11-04 | 2022-02-08 | 浙江同正管道技术有限公司 | High-temperature-resistant PVC composite mute drainage pipe and preparation method thereof |
| CN114013113B (en) * | 2021-11-04 | 2023-11-14 | 浙江同正管道技术有限公司 | High-temperature-resistant PVC composite mute drainage pipe and preparation method thereof |
| EP4389813A1 (en) | 2022-12-22 | 2024-06-26 | Made of Air GmbH | Shaped objects based on modified biochar and a polymer and methods for producing them |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112143211B (en) | 2021-09-24 |
| WO2022057144A1 (en) | 2022-03-24 |
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