Preparation method of polyurethane leather with electric conduction, infrared stealth and ultraviolet aging resistance functions

Abstract

The invention discloses a preparation method of polyurethane leather with electric conduction, infrared stealth and ultraviolet aging resistance functions, and relates to a textile material technology. The preparation method comprises the following steps: firstly, weighing 50g of waterborne polyurethane, adding a dispersing agent, and stirring in a dispersing machine at the rotating speed of 1,000 rpm for 10 minutes; sequentially adding a certain amount of graphene, carbon black, carbon fiber powder and copper powder into the dispersion system to serve as functional particles, adding one kind of functional particles every 5 minutes, and stirring for 5 minutes after adding one kind of functional particles; then adding 0.12 g of lauryl sodium sulfate and 1.2 g of a flatting agent, and continuously stirring for 10 to 20 minutes until the viscosity of the system reaches 30000 Pa.s; and finally, a heating scraper and winding bar integrated coating testing machine is used for coating to manufacture the leather. The polyurethane leather with the conductive, infrared stealth and ultraviolet aging resistant functions is prepared, the polyurethane leather has the conductive, infrared stealth and ultraviolet aging resistant functions, the flexibility and mechanical performance of the material can be kept, and the polyurethane leather can adapt to various complex application environments.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of textile materials, and particularly relates to a preparation method of polyurethane leather with the functions of electric conduction, infrared stealth and ultraviolet aging resistance. BACKGROUND

[0002] As an important imitation leather material, polyurethane leather has been widely used in many fields such as clothing, home, automotive interior and military due to its excellent flexibility and processing adaptability. However, the traditional polyurethane material still has obvious deficiencies in functionality, such as no electric conduction, easy aging and performance degradation in long-term outdoor ultraviolet light environment, which limits its application in complex environments.

[0003] Currently, some researches have tried to add functional fillers (such as carbon-based materials, metal powders, etc.) to improve the electric conductivity or infrared stealth performance of polyurethane materials, but there are still problems such as uneven dispersion of fillers, poor interface bonding, and difficulty in achieving multiple functions simultaneously. In particular, in the material system of realizing multiple functions in one, how to balance the electric conduction, infrared stealth and ultraviolet aging resistance, and at the same time maintain the original mechanical properties and flexibility of the material, is still a difficulty in current technology.

[0004] Therefore, it is urgent to develop a preparation method of polyurethane leather with simple process, performance synergy and suitable for complex application environment, so that it can have good electric conductivity and infrared stealth function, significantly improve the ultraviolet aging resistance, and maintain the original mechanical properties and flexibility of the material, thereby expanding its application range in special complex environments. SUMMARY

[0005] The purpose of the present application is to provide a preparation method of polyurethane leather with the functions of electric conduction, infrared stealth and ultraviolet aging resistance, to solve the problem that the traditional polyurethane leather cannot adapt to complex application environments in the background art.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is as follows: A preparation method of polyurethane leather with the functions of electric conduction, infrared stealth and ultraviolet aging resistance, comprising the following steps: S1, 50 g of water-based polyurethane is weighed and a dispersing agent is added, and stirred at a speed of 1000 rpm of the dispersing machine for 10 min; S2, a certain amount of graphene, carbon black, carbon fiber powder and copper powder are added to the dispersion system as functional particles, one kind of functional particle is added every 5 min, and stirred for 5 min after adding one kind of functional particle; S3, add 0.12 g of sodium dodecyl sulfate and 1.2 g of leveling agent, continue to stir for 10-20 min until the viscosity of the system reaches 30000 Pa·s; S4, use a heated doctor blade line rod integrated film coating tester to make leather film.

[0007] Preferably, the dispersant added in S1 is 1.2 g in mass.

[0008] Preferably, the functional particles graphene, carbon black, carbon fiber powder and copper powder added in S2 are all 5 g in mass.

[0009] Compared with the prior art, the beneficial effects of the present application are: The present application can effectively prepare polyurethane leather with the functions of electric conduction, infrared stealth and ultraviolet aging resistance. The material not only has the functions of electric conduction, infrared stealth and ultraviolet aging resistance, but also maintains the flexibility and mechanical properties of the material, and can adapt to various complex application environments. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 The figure is the resistance graph of the polyurethane leather with the functions of electric conduction, infrared stealth and ultraviolet aging resistance in the present application.

[0011] Figure 2 The figure is the infrared emissivity graph of the polyurethane leather with the functions of electric conduction, infrared stealth and ultraviolet aging resistance in the present application.

[0012] Figure 3 The figure is the UPF (ultraviolet protection factor) graph of the polyurethane leather with the functions of electric conduction, infrared stealth and ultraviolet aging resistance in the present application. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. EMBODIMENT

[0014] The present application discloses a preparation method of polyurethane leather with the functions of electric conduction, infrared stealth and ultraviolet aging resistance, comprising the following steps: Step 1: weigh 50 g of water-based polyurethane, add 1.2 g of dispersant, and stir at a speed of 1000 rpm of the disperser for 10 min; Step 2: Add 5 g each of graphene, carbon black, carbon fiber powder and copper powder as functional particles to the dispersion system in sequence, adding one functional particle at 5 min intervals, and stirring for 5 min after adding one functional particle. Step 3: Add 0.12 g sodium dodecyl sulfate and 1.2 g leveling agent, and continue stirring for 10-20 min until the system viscosity reaches 30000 Pa·s; Step 4: Use a heated scraper and bar integrated coating testing machine to coat the leather.

[0015] Experimental results: like Figure 1 As shown, the polyurethane leather prepared in this embodiment, which combines conductivity, infrared stealth, and UV aging resistance, has a resistivity of 0.345 MΩ. Figure 2 As shown, its UPF value reaches 131, as Figure 3 As shown, its infrared emissivity is 0.674.

[0016] The above description is merely a preferred embodiment of the present invention and is only used to help understand the method and core essence of the present invention. However, the scope of protection of the present invention is not limited thereto. For those skilled in the art, within the technical scope disclosed in the present invention, any equivalent substitutions or modifications made according to the technical solution and inventive concept of the present invention should be covered within the scope of protection of the present invention. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for preparing polyurethane leather with conductive, infrared stealth, and UV aging resistance properties, characterized in that, Includes the following steps: S1. Weigh 50 g of waterborne polyurethane, add dispersant, and stir for 10 min at a speed of 1000 rpm in a disperser. S2. A certain amount of graphene, carbon black, carbon fiber powder and copper powder are added to the dispersion system in sequence as functional particles. One type of functional particle is added at 5 min intervals. After adding one type of functional particle, the mixture is stirred for 5 min. S3. Add 0.12 g sodium dodecyl sulfate and 1.2 g leveling agent, and continue stirring for 10-20 min until the system viscosity reaches 30000 Pa·s; S4. Use a heated scraper and bar integrated coating testing machine to coat leather.

2. The method for preparing polyurethane leather with conductive, infrared stealth, and UV aging resistance functions according to claim 1, characterized in that, The mass of the dispersant added in S1 is 1.2 g.

3. The method for preparing polyurethane leather with conductive, infrared stealth, and UV aging resistance functions according to claim 1, characterized in that, The functional particles graphene, carbon black, carbon fiber powder, and copper powder added in S2 each have a mass of 5 g.

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