Nanometer polyurethane film with enhancement performance and manufacturing method thereof

Abstract

The invention relates to the technical field of nano polyurethane films, and discloses a nano polyurethane film with enhanced performance, which is prepared from the following components in percentage by weight: 40% of graphene, 40% of polyurethane resin, 10% of nano material, 10% of plasticizer, 10% of cross-linking agent, 10% of solvent and 10% of other additives. The proportion of the plasticizer, the cross-linking agent, the solvent and the other additives is 10%, the graphene is composed of carbon atoms, the basic element of the composition is carbon, by adding the graphene, the mechanical strength, the electrical conductivity, the thermal conductivity and the like of the film can be remarkably improved, the functionality of the film can be improved, such as gas shielding, ultraviolet protection, electromagnetic shielding and the like, and the film can be widely applied to the field of film manufacturing. According to the invention, slippage and fracture of a polyurethane chain can be effectively prevented through the nanoparticles, so that the tensile resistance, compression resistance and impact resistance of the film are improved, and the performance of the nano polyurethane film can be enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of nano polyurethane films, in particular to a nano polyurethane film with enhanced performance and a manufacturing method thereof. Background Art

[0002] Since the 1960s, polyvinyl chloride, chloroprene rubber and various synthetic rubbers have been widely used in the field of clothing for special environments. Clothing made of these materials has the advantages of being waterproof and liquid-proof. However, at the same time, the sweat produced by the body's own metabolism cannot be discharged from the body in time, causing people to feel uncomfortable such as stuffy, cold and wet. This is mainly due to the lack of "breathability" of such polymer materials. Films and coatings made of polyurethane can cleverly combine the two functions of waterproof and breathable, while retaining their own excellent physical and chemical properties. They are ideal materials that can achieve the above-mentioned "breathability". Therefore, polyurethane films are widely used in fabrics and lining materials such as diving suits, swimsuits, rhythmic suits and air landing suits, inflatable water beds, ball bladders, kayaks, lifebuoys, etc.

[0003] According to the Chinese patent, its announcement number is "CN108383975B", which discloses a method for preparing an antibacterial polypeptide modified polyurethane nanofilm, including the steps of: preparing an antibacterial polypeptide modified polyurethane resin; dissolving the obtained polyurethane resin in a suitable solvent, obtaining a nanofilm by spin coating, and then drying and removing the solvent after UV light curing, and finally obtaining the desired antibacterial polypeptide modified polyurethane nanofilm; wherein the solvent is one or more of tetrahydrofuran, methanol, ethanol, propanol, and water. The antibacterial polypeptide modified polyurethane nanofilm prepared by the method of the present invention has good biological safety, is convenient and comfortable to use, can physically adhere to tissues of different morphologies, has good antibacterial effect and does not produce bacterial resistance. When in use, some commonly used films have poor tensile strength and compression impact resistance, which easily leads to a reduction in their service life. Therefore, their own capabilities can be improved by enhancing, so a nano polyurethane film with enhanced performance and a method for manufacturing the same are proposed to solve the above-mentioned problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a nano polyurethane film with enhanced performance and a method for manufacturing the same in view of the deficiencies in the above-mentioned prior art.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a nano polyurethane film with enhanced performance, comprising the following formula, consisting of graphene, polyurethane resin, nano material, plasticizer, cross-linking agent, solvent, and other additives, graphene accounts for 40%, polyurethane resin accounts for 40%, nano material accounts for 10%, plasticizer, cross-linking agent, solvent, and other additives account for 10%.

[0006] Preferably, the graphene is composed of carbon atoms, and the basic element of its composition is carbon. By adding graphene, the film can not only be significantly improved in terms of mechanical strength, electrical conductivity, thermal conductivity, etc., but also increase the functionality of the film, such as gas shielding, UV protection, electromagnetic shielding, etc.

[0007] Preferably, the polyurethane resin is a polymer material synthesized by addition reaction of diisocyanate and polyol, and the properties of the polyurethane resin depend on the types and proportions of diisocyanate and polyol in its composition. Polyurethane materials have excellent wear resistance, flexibility, chemical corrosion resistance and thermal stability, which makes nano polyurethane film widely used in many high-performance fields.

[0008] Preferably, the nanomaterial is composed of nanoparticles and nanofibers. The nanoparticles include silica, alumina, carbon nanotubes (CNT), graphene, and nano zinc sulfide, and are mainly used to improve the mechanical strength, wear resistance and thermal stability of the film. The nanofibers are composed of nanocellulose and polymer nanofibers, and are used to enhance the tensile strength and durability of the film.

[0009] Preferably, the plasticizer is composed of 60% phthalates and 40% cycloalkanoates, which can reduce the interaction between polyurethane molecular chains, thereby lowering the glass transition temperature of the film and making the film easier to process and shape.

[0010] Preferably, the cross-linking agent is composed of isocyanate compounds and peroxides, and is used to increase the stability of the film structure. The main function of the cross-linking agent in film processing is to improve the mechanical properties, thermal stability, chemical stability, solvent resistance and other properties of the film through cross-linking reactions, thereby making the film more reliable and durable in various special environments and applications.

[0011] Preferably, the solvent consists of ethyl acetate, acetone and dichloromethane, which is used to prepare a uniform film, help dissolve the polymer material, reduce viscosity, and also affect the film quality, surface characteristics and final performance of the film.

[0012] Preferably, other additives include anti-ultraviolet agents, antioxidants, mildew inhibitors and antibacterial agents, and surfactants. The anti-ultraviolet agents are used to improve the ability to resist ultraviolet rays and extend its service life. The antioxidants are used to prevent polyurethane from oxidizing in high temperature and oxygen environments. The mildew inhibitors and antibacterial agents are used to enhance the antibacterial and mildew resistance. The surfactants are used to help improve the surface tension properties of the film and enhance adhesion and anti-pollution capabilities.

[0013] A nano polyurethane film with enhanced performance and a method for manufacturing the same, the method comprising the following steps: Step 1: 40% of graphene, 40% of polyurethane resin, 10% of nanomaterials, 10% of plasticizers, crosslinking agents, solvents, and other additives are placed together and fully mixed, and high-speed blending is performed to modify them. The stirring reaction conditions are: temperature 40-50°C, time 1-1.5h, stirring rate 100-200r / min; Step 2: Heat the material to melt, heat the material to 70-90°C, and stir at a constant speed for 30-60 minutes to make it fluid or semi-fluid; Step 3: knead the materials, perform ultrasonic dispersion treatment on the solution at 50-70°C for 1-2h, with an ultrasonic frequency of 22-30KHz, place the solution in an oil bath and heat it to 80-90°C, react for 2-10h until a sol-like material is formed and heated to a temperature above its melting point; Step 4: plasticizing the material by heating the heating roller to 80° and heating the graphene, 40% polyurethane resin, 10% nanomaterials, 10% plasticizer, crosslinking agent, solvent, and other additives through the heating roller for 2 hours until it reaches a soft state; Step 5: The material is extruded. The raw material is fed into the hopper of the extruder. The screw is continuously rotated and pushed. Under the push of the screw of the extruder, the molten plastic flows out evenly through the die head. Step 6: The material is molded, the extruded material is placed in a mold, and rolled inside the mold by a roller to roll it into shape; Step 7: Cool the material and let the formed material stand and cool for 3 hours until it is completely cooled; Step 8: Wind up the material, wind the cooled film onto a reel, rotate the reel, and wind up the film.

[0014] The present invention adopts the above technical solution to bring the following beneficial effects: 1. A nano polyurethane film with enhanced performance and a method for manufacturing the same can effectively prevent the slippage and breakage of polyurethane chains through nanoparticles, thereby improving the tensile, compression and impact resistance of the film, so that the performance of the nano polyurethane film can be enhanced.

[0015] 2. This nano polyurethane film with enhanced performance and its manufacturing method can make the film have better thermal conductivity and resistance to thermal decomposition through nano materials, help the polyurethane film maintain stability in high temperature environment, and avoid performance degradation caused by overheating.

[0016] 3. The nano polyurethane film with enhanced performance and its manufacturing method can effectively improve the wear resistance of the polyurethane film through nano fillers, which makes it perform better in some high-wear environments, reduces the occurrence of surface damage, and prolongs the service life. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "setting" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0021] One embodiment of the present invention is: a nano polyurethane film with enhanced performance, comprising the following formula, consisting of graphene, polyurethane resin, nano material, plasticizer, cross-linking agent, solvent, and other additives, wherein graphene accounts for 40%, polyurethane resin accounts for 40%, nano material accounts for 10%, plasticizer, cross-linking agent, solvent, and other additives account for 10%, graphene is composed of carbon atoms, and its basic element is carbon, polyurethane resin is a polymer material synthesized by addition reaction of diisocyanate and polyol, and the properties of polyurethane resin depend on the types and proportions of diisocyanate and polyol in its composition. Polyurethane materials have excellent wear resistance, flexibility, chemical corrosion resistance and thermal stability, which makes nano polyurethane films widely used in many high-performance fields. Nano materials are composed of nano particles and nano fibers. Nano particles include silica, alumina, carbon nano tubes (CNT), graphene, and nano zinc sulfide. They are mainly used to improve the mechanical strength, wear resistance and thermal stability of the film. Nano fibers are composed of nano cellulose and polymer nano fibers, which are used to enhance the tensile strength and durability of the film. Plasticizers are composed of phthalates and cyclopentaneates. Their function is to reduce the interaction force between polyurethane molecular chains, thereby lowering the glass transition temperature of the film and making the film easier to process and form. The cross-linking agent is composed of isocyanate compounds and peroxides, and is used to increase the stability of the film structure. The solvent is composed of ethyl acetate, acetone, and dichloromethane, and is used to prepare a uniform film. Other additives include UV inhibitors, antioxidants, mildew inhibitors and antibacterial agents, and surfactants. UV inhibitors are used to improve UV resistance and extend their service life. Antioxidants are used to prevent polyurethane from oxidizing in high temperature and oxygen environments. Mildew inhibitors and antibacterial agents are used to enhance antibacterial and mildew resistance. Surfactants are used to help improve the surface tension properties of the film, and enhance adhesion and anti-pollution capabilities.

[0022] On the basis of the above embodiment, in another embodiment of the present invention, a nano polyurethane film with enhanced performance and a method for manufacturing the same according to claim 8 comprises the following steps: Step 1: 40% of graphene, 40% of polyurethane resin, 10% of nanomaterials, 10% of plasticizers, crosslinking agents, solvents, and other additives are placed together and fully mixed, and high-speed blending is performed to modify them. The stirring reaction conditions are: temperature 40-50°C, time 1-1.5h, stirring rate 100-200r / min; Step 2: Heat the material to melt, heat the material to 70-90°C, and stir at a constant speed for 30-60 minutes to make it fluid or semi-fluid; Step 3: knead the materials, perform ultrasonic dispersion treatment on the solution at 50-70°C for 1-2h, with an ultrasonic frequency of 22-30KHz, place the solution in an oil bath and heat it to 80-90°C, react for 2-10h until a sol-like material is formed and heated to a temperature above its melting point; Step 4: plasticizing the material by heating the heating roller to 80° and heating the graphene, 40% polyurethane resin, 10% nanomaterials, 10% plasticizer, crosslinking agent, solvent, and other additives through the heating roller for 2 hours until it reaches a soft state; Step 5: The material is extruded. The raw material is fed into the hopper of the extruder. The screw is continuously rotated and pushed. Under the push of the screw of the extruder, the molten plastic flows out evenly through the die head. Step 6: The material is molded, the extruded material is placed in a mold, and rolled inside the mold by a roller to roll it into shape; Step 7: Cool the material and let the formed material stand and cool for 3 hours until it is completely cooled; Step 8: Wind up the material, wind the cooled film onto a reel, rotate the reel, and wind up the film.

[0023] The present invention provides a nano polyurethane film with enhanced performance and a method for manufacturing the same. There are many methods and approaches to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be noted that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be considered as the scope of protection of the present invention. All components not specified in this embodiment can be implemented using existing technologies.

Claims

1. A nano polyurethane film with enhanced performance, comprising the following formula composition, characterized in that: It is composed of graphene, polyurethane resin, nanomaterials, plasticizers, cross-linkers, solvents and other additives, with graphene accounting for 40%, polyurethane resin accounting for 40%, nanomaterials accounting for 10%, and plasticizers, cross-linkers, solvents and other additives accounting for 10%.

2. The nano polyurethane film with enhanced performance according to claim 1, characterized in that: The graphene is composed of carbon atoms, and the basic element of the graphene is carbon.

3. The nano polyurethane film with enhanced performance according to claim 2, characterized in that: The polyurethane resin is a polymer material synthesized by addition reaction of diisocyanate and polyol.

4. The nano polyurethane film with enhanced performance according to claim 3, characterized in that: The nanomaterial consists of nanoparticles and nanofibers. The nanoparticles include silicon dioxide, aluminum oxide, carbon nanotubes (CNT), graphene, and nano zinc sulfide. The nanofibers consist of nano cellulose and polymer nanofibers.

5. The nano polyurethane film with enhanced performance according to claim 4, characterized in that: The plasticizer consists of 40% of phthalates and 60% of cycloalkaneates.

6. The nano polyurethane film with enhanced performance according to claim 5, characterized in that: The cross-linking agent consists of isocyanate compounds and peroxides.

7. The nano polyurethane film with enhanced performance according to claim 6, characterized in that: The solvent consists of ethyl acetate, acetone and dichloromethane.

8. The nano polyurethane film with enhanced performance according to claim 7, characterized in that: Other additives include UV inhibitors, antioxidants, mildew inhibitors, antibacterial agents, and surfactants.

9. A nano polyurethane film with enhanced performance and a method for manufacturing the same according to claim 8, characterized in that: The method comprises the following steps: Step 1: 40% of graphene, 40% of polyurethane resin, 10% of nanomaterials, 10% of plasticizers, crosslinking agents, solvents, and other additives are placed together and fully mixed, and high-speed blending is performed to modify them. The stirring reaction conditions are: temperature 40-50°C, time 1-1.5h, stirring rate 100-200r / min; Step 2: Heat the material to melt, heat the material to 70-90°C, and stir at a constant speed for 30-60 minutes to make it fluid or semi-fluid; Step 3: knead the materials, perform ultrasonic dispersion treatment on the solution at 50-70°C for 1-2h, with an ultrasonic frequency of 22-30KHz, place the solution in an oil bath and heat it to 80-90°C, react for 2-10h until a sol-like material is formed and heated to a temperature above its melting point; Step 4: plasticizing the material by heating the heating roller to 80° and heating the graphene, 40% polyurethane resin, 10% nanomaterials, 10% plasticizer, crosslinking agent, solvent, and other additives through the heating roller for 2 hours until it reaches a soft state; Step 5: The material is extruded. The raw material is fed into the hopper of the extruder. The screw is continuously rotated and pushed. Under the push of the screw of the extruder, the molten plastic flows out evenly through the die head. Step 6: The material is molded, the extruded material is placed in a mold, and rolled inside the mold by a roller to roll it into shape; Step 7: Cool the material and let the formed material stand and cool for 3 hours until it is completely cooled; Step 8: Wind up the material, wind the cooled film onto a reel, rotate the reel, and wind up the film.