Anticorrosive and pollution-resistant molecular sieve coated aluminum foil and preparation method thereof

Abstract

The application discloses a kind of anticorrosive pollution-resistant molecular sieve coating aluminum foil and preparation method thereof.Prepare molecular sieve coating material: molecular sieve is mixed with self-made polymer material mixture, and homogenization treatment is carried out in high-speed stirrer, and molecular sieve coating material is prepared; Aluminum foil surface treatment: including cleaning and deoxidation and the like treatment, to ensure the adhesion of coating; Molecular sieve coating material is coated on the surface of aluminum foil, and it is naturally dried at room temperature for a period of time; Heat treatment, the aluminum foil coated with molecular sieve coating is placed in oven, and is baked, so that it forms dense molecular sieve coating.The molecular sieve coating aluminum foil of the application can be widely used in packaging, building, electronics and other fields, for the packaging protection of food, medicine, electronic components and the like, and has important commercial and industrial value.

Description

Technical Field

[0001] This invention relates to the field of coated aluminum foil materials technology, specifically to a corrosion-resistant and pollution-resistant molecular sieve coated aluminum foil and its preparation method. Background Technology

[0002] Molecular sieves are porous solid materials with excellent molecular sieving properties, finding wide applications in catalysis, adsorption, and separation. However, molecular sieves are susceptible to corrosion and contamination, which reduces their service life and efficiency. Therefore, developing a molecular sieve coating material that effectively prevents corrosion and contamination is crucial for improving the stability and extending the service life of molecular sieves. Summary of the Invention

[0003] The purpose of this invention is to provide a corrosion-resistant and pollution-resistant molecular sieve coated aluminum foil and its preparation method, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil, wherein the molecular sieve coating material is prepared by mixing a molecular sieve with a self-made polymer material and then heat-treated to form a dense molecular sieve coating.

[0006] The preparation process of the self-made polymer material mixture is as follows:

[0007] (1) Place 4,4′-diphenylmethane diisocyanate and N,N-dimethylformamide in a reaction vessel at a mass ratio of 1:5-1:10. Stir and react for 20-30 min at a temperature of 50-60℃ and a rotation speed of 800-1000 r / min. Then add 0.5-0.8 times the mass of N,N-dimethylformamide in polypropylene glycol. Then raise the temperature to 70-80℃ and stir and react for 30-50 min. Then lower the temperature to 0-3℃. Then uniformly drop furfurylamine is added to the reaction vessel at a mass ratio of 0.2-0.3 times the mass of N,N-dimethylformamide. Then stir for 20-30 min to obtain the modified prepolymer.

[0008] (2) Mix the modified prepolymer with E51 at a mass ratio of 1:2-1:3, then add N,N′-(4,4′-methylenediphenyl)bismaleimide at a mass ratio of 0.8-1.2 times that of the modified prepolymer, then add tetraethylenepentamine at a mass ratio of 0.01-0.02 times that of the modified prepolymer, and then stir and mix for 20-30 minutes to obtain a self-made polymer material mixture.

[0009] The molecular sieve is ZSM-5 molecular sieve or Y-type molecular sieve.

[0010] A method for preparing a corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil includes the following steps:

[0011] (1) Preparation of molecular sieve coating material: Mix molecular sieve with self-made polymer material mixture and homogenize in a high-speed stirrer to prepare molecular sieve coating material.

[0012] (2) Perform aluminum foil surface treatment: including cleaning and deoxidation, to ensure the adhesion of the coating.

[0013] (3) Coat the aluminum foil surface with molecular sieve coating material and let it stand at room temperature for a period of time to allow it to dry naturally.

[0014] (4) Heat treatment: Place the aluminum foil coated with molecular sieve into an oven and bake it to form a dense molecular sieve coating.

[0015] The cleaning process includes removing surface oil and metal oxides.

[0016] The deoxidation treatment involves immersing the aluminum foil in a solution containing an acidic oxidant.

[0017] The heat treatment temperature is between 150°C and 250°C, and the time is between 30 minutes and 2 hours.

[0018] The molecular sieve in the molecular sieve coating material accounts for 10%-50% of the total mass.

[0019] In summary, due to the adoption of the above-mentioned technologies, the beneficial effects of this invention are:

[0020] In this invention, firstly, the molecular sieve coating effectively prevents corrosion of the aluminum foil surface. Due to the excellent chemical stability and corrosion resistance of molecular sieves, the molecular sieve coating applied to the aluminum foil surface can block corrosive substances from the external environment, preventing them from eroding the aluminum foil and thus extending its service life.

[0021] Secondly, the molecular sieve coating can prevent the adsorption of pollutants. The porous structure of molecular sieves has a large specific surface area and adsorption capacity, which can effectively adsorb and intercept pollutants in the air, such as harmful gases and particles. This can prevent pollutants from entering the interior of the aluminum foil, keeping the aluminum foil clean and maintaining stable quality.

[0022] In addition, molecular sieve coatings have good thermal stability and high temperature resistance, and can maintain their structural stability and functional performance in high-temperature environments, making them suitable for various high-temperature applications.

[0023] The molecular sieve coated aluminum foil of the present invention can be widely used in packaging, construction, electronics and other fields for packaging protection of food, medicine, electronic components, etc., and has important commercial and industrial value.

[0024] In summary, this invention provides a corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil and its preparation method. By forming a molecular sieve coating with excellent corrosion and pollution resistance on the surface of the aluminum foil, the service life and protective performance of the aluminum foil are effectively improved. This invention has the advantages of simple preparation, low cost, and wide application, and has broad market application prospects in related fields. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a 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 those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Example 1

[0027] A corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil, wherein the molecular sieve coating material is prepared by mixing a molecular sieve with a self-made polymer material and then heat-treated to form a dense molecular sieve coating.

[0028] The preparation process of the self-made polymer material mixture is as follows:

[0029] (1) 4,4′-diphenylmethane diisocyanate and N,N-dimethylformamide were placed in a reaction vessel at a mass ratio of 1:10. The mixture was stirred for 30 min at a temperature of 60℃ and a rotation speed of 800-1000 r / min. Then, 0.8 times the mass of N,N-dimethylformamide in polypropylene glycol was added. The temperature was then raised to 80℃ and stirred for 50 min. The temperature was then lowered to 0℃. Then, 0.2 times the mass of N,N-dimethylformamide in furfurylamine was added dropwise to the reaction vessel. The mixture was stirred for 30 min to obtain the modified prepolymer.

[0030] (2) Mix the modified prepolymer with E51 at a mass ratio of 1:3, then add N,N′-(4,4′-methylenediphenyl)bismaleimide at a mass ratio of 1.2 times that of the modified prepolymer, then add tetraethylenepentamine at a mass ratio of 0.01 times that of the modified prepolymer, and then stir and mix for 30 minutes to obtain a self-made polymer material mixture.

[0031] The molecular sieve is a Y-type molecular sieve.

[0032] A method for preparing a corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil includes the following steps:

[0033] (1) Preparation of molecular sieve coating material: Mix molecular sieve with self-made polymer material mixture and homogenize in a high-speed stirrer to prepare molecular sieve coating material.

[0034] (2) Perform aluminum foil surface treatment: including cleaning and deoxidation, to ensure the adhesion of the coating.

[0035] (3) Coat the aluminum foil surface with molecular sieve coating material and let it stand at room temperature for a period of time to allow it to dry naturally.

[0036] (4) Heat treatment: Place the aluminum foil coated with molecular sieve into an oven and bake it to form a dense molecular sieve coating.

[0037] The cleaning process includes removing surface oil and metal oxides.

[0038] The deoxidation treatment involves immersing the aluminum foil in a solution containing an acidic oxidant.

[0039] The heat treatment was performed at a temperature of 150°C for 1 hour.

[0040] The molecular sieve in the molecular sieve coating material accounts for 20% of the total mass.

[0041] Example 2

[0042] A corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil, wherein the molecular sieve coating material is prepared by mixing a molecular sieve with a self-made polymer material and then heat-treated to form a dense molecular sieve coating.

[0043] The preparation process of the self-made polymer material mixture is as follows:

[0044] (1) 4,4′-diphenylmethane diisocyanate and N,N-dimethylformamide were placed in a reaction vessel at a mass ratio of 1:6. The mixture was stirred for 30 min at a temperature of 60℃ and a rotation speed of 900 r / min. Then, 0.5 times the mass of N,N-dimethylformamide and polypropylene glycol were added. The temperature was then raised to 70℃ and stirred for 50 min. The temperature was then lowered to 3℃. Then, 0.3 times the mass of N,N-dimethylformamide and furfurylamine were added dropwise to the reaction vessel. The mixture was stirred for 30 min to obtain the modified prepolymer.

[0045] (2) Mix the modified prepolymer and E51 at a mass ratio of 1:3, then add N,N′-(4,4′-methylenediphenyl)bismaleimide at a mass ratio of 0.8 times that of the modified prepolymer, then add tetraethylenepentamine at a mass ratio of 0.02 times that of the modified prepolymer, and then stir and mix for 20 minutes to obtain a self-made polymer material mixture.

[0046] The molecular sieve is ZSM-5 molecular sieve.

[0047] A method for preparing a corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil includes the following steps:

[0048] (1) Preparation of molecular sieve coating material: Mix molecular sieve with self-made polymer material mixture and homogenize in a high-speed stirrer to prepare molecular sieve coating material.

[0049] (2) Perform aluminum foil surface treatment: including cleaning and deoxidation, to ensure the adhesion of the coating.

[0050] (3) Coat the aluminum foil surface with molecular sieve coating material and let it stand at room temperature for a period of time to allow it to dry naturally.

[0051] (4) Heat treatment: Place the aluminum foil coated with molecular sieve into an oven and bake it to form a dense molecular sieve coating.

[0052] The cleaning process includes removing surface oil and metal oxides.

[0053] The deoxidation treatment involves immersing the aluminum foil in a solution containing an acidic oxidant.

[0054] The heat treatment was performed at a temperature of 150°C for 30 minutes.

[0055] The molecular sieve in the molecular sieve coating material accounts for 50% of the total mass.

[0056] Example 3

[0057] A corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil, wherein the molecular sieve coating material is prepared by mixing a molecular sieve with a self-made polymer material and then heat-treated to form a dense molecular sieve coating.

[0058] The preparation process of the self-made polymer material mixture is as follows:

[0059] (1) 4,4′-diphenylmethane diisocyanate and N,N-dimethylformamide were placed in a reaction vessel at a mass ratio of 1:5. The mixture was stirred for 30 min at a temperature of 60℃ and a rotation speed of 1000 r / min. Then, 0.5 times the mass of N,N-dimethylformamide and polypropylene glycol were added. The temperature was then raised to 70℃ and stirred for 50 min. The temperature was then lowered to 3℃. Then, 0.3 times the mass of N,N-dimethylformamide and furfurylamine were added dropwise to the reaction vessel. The mixture was stirred for 30 min to obtain the modified prepolymer.

[0060] (2) Mix the modified prepolymer with E51 at a mass ratio of 1:3, then add N,N′-(4,4′-methylenediphenyl)bismaleimide at a mass ratio of 0.8 times that of the modified prepolymer, then add tetraethylenepentamine at a mass ratio of 0.01 times that of the modified prepolymer, and then stir and mix for 20 minutes to obtain a self-made polymer material mixture.

[0061] The molecular sieve is ZSM-5 molecular sieve.

[0062] A method for preparing a corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil includes the following steps:

[0063] (1) Preparation of molecular sieve coating material: Mix molecular sieve with self-made polymer material mixture and homogenize in a high-speed stirrer to prepare molecular sieve coating material.

[0064] (2) Perform aluminum foil surface treatment: including cleaning and deoxidation, to ensure the adhesion of the coating.

[0065] (3) Coat the aluminum foil surface with molecular sieve coating material and let it stand at room temperature for a period of time to allow it to dry naturally.

[0066] (4) Heat treatment: Place the aluminum foil coated with molecular sieve into an oven and bake it to form a dense molecular sieve coating.

[0067] The cleaning process includes removing surface oil and metal oxides.

[0068] The deoxidation treatment involves immersing the aluminum foil in a solution containing an acidic oxidant.

[0069] The heat treatment was performed at a temperature of 250°C for 2 hours.

[0070] The molecular sieve in the molecular sieve coating material accounts for 30% of the total mass.

[0071] Comparative Example 1

[0072] A corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil, wherein the molecular sieve coating material is a molecular sieve, E51 and tetraethylenepentamine mixed together and heat-treated to form a dense molecular sieve coating.

[0073] The molecular sieve is ZSM-5 molecular sieve.

[0074] A method for preparing a corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil includes the following steps:

[0075] (1) Preparation of molecular sieve coating material: Mix molecular sieve with self-made polymer material mixture and homogenize in a high-speed stirrer to prepare molecular sieve coating material.

[0076] (2) Perform aluminum foil surface treatment: including cleaning and deoxidation, to ensure the adhesion of the coating.

[0077] (3) Coat the aluminum foil surface with molecular sieve coating material and let it stand at room temperature for a period of time to allow it to dry naturally.

[0078] (4) Heat treatment: Place the aluminum foil coated with molecular sieve into an oven and bake it to form a dense molecular sieve coating.

[0079] The cleaning process includes removing surface oil and metal oxides.

[0080] The deoxidation treatment involves immersing the aluminum foil in a solution containing an acidic oxidant.

[0081] The heat treatment was performed at a temperature of 250°C for 2 hours.

[0082] The molecular sieve in the molecular sieve coating material accounts for 30% of the total mass.

[0083] Performance tests were conducted on Examples 1-3 and Comparative Example 1. The specific testing methods and results are as follows:

[0084] Salt spray test: The products of the above examples and comparative examples were cut into 100mm×50mm test pieces and placed in a constant temperature (35℃) salt spray chamber, with the salt spray deposition controlled at 2g / 80cm per hour. 2 The spray volume was continuously increased, and the time to corrosion was observed. The specific results are shown in Table 1.

[0085] Table 1

[0086]

[0087]

[0088] As can be seen from the comparison of Examples 1-3 and Comparative Examples 1-3, firstly, the molecular sieve coating can effectively prevent corrosion of the aluminum foil surface. Due to the excellent chemical stability and corrosion resistance of molecular sieves, the molecular sieve coating applied to the aluminum foil surface can block corrosive substances from the external environment, preventing them from eroding the aluminum foil and thus extending its service life.

[0089] Secondly, the molecular sieve coating can prevent the adsorption of pollutants. The porous structure of molecular sieves has a large specific surface area and adsorption capacity, which can effectively adsorb and intercept pollutants in the air, such as harmful gases and particles. This can prevent pollutants from entering the interior of the aluminum foil, keeping the aluminum foil clean and maintaining stable quality.

[0090] In addition, molecular sieve coatings have good thermal stability and high temperature resistance, and can maintain their structural stability and functional performance in high-temperature environments, making them suitable for various high-temperature applications.

[0091] The molecular sieve coated aluminum foil of the present invention can be widely used in packaging, construction, electronics and other fields for packaging protection of food, medicine, electronic components, etc., and has important commercial and industrial value.

[0092] In summary, this invention provides a corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil and its preparation method. By forming a molecular sieve coating with excellent corrosion and pollution resistance on the surface of the aluminum foil, the service life and protective performance of the aluminum foil are effectively improved. This invention has the advantages of simple preparation, low cost, and wide application, and has broad market application prospects in related fields.

[0093] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0094] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A corrosion-resistant and pollution-resistant molecular sieve-coated aluminum foil, characterized in that, The molecular sieve coating material is prepared by mixing molecular sieves with a self-made polymer material, and then heat-treated to form a dense molecular sieve coating. The preparation process of the self-made polymer material mixture is as follows: (1) Place 4,4′-diphenylmethane diisocyanate and N,N-dimethylformamide in a reaction vessel at a mass ratio of 1:5-1:

10. Stir and react for 20-30 min at a temperature of 50-60℃ and a rotation speed of 800-1000 r / min. Then add 0.5-0.8 times the mass of N,N-dimethylformamide in polypropylene glycol. Then raise the temperature to 70-80℃ and stir and react for 30-50 min. Then lower the temperature to 0-3℃. Then uniformly drop furfurylamine at 0.2-0.3 times the mass of N,N-dimethylformamide into the reaction vessel and stir for 20-30 min to obtain the modified prepolymer. (2) Mix the modified prepolymer and E51 at a mass ratio of 1:2 to 1:3, then add 0.8 to 1.2 times the mass of the modified prepolymer of N,N′-(4,4′-methylenediphenyl)bismaleimide, then add 0.01 to 0.02 times the mass of the modified prepolymer of tetraethylenepentamine, and then stir and mix for 20 to 30 minutes to obtain a self-made polymer material mixture; The molecular sieve is ZSM-5 molecular sieve or Y-type molecular sieve; The method for preparing the corrosion-resistant and pollution-resistant molecular sieve coated aluminum foil includes the following steps: (1) Preparation of molecular sieve coating material: Mix molecular sieve with self-made polymer material mixture and homogenize in a high-speed stirrer to prepare molecular sieve coating material; (2) Perform aluminum foil surface treatment: including cleaning and deoxidation treatment to ensure the adhesion of the coating; (3) Coat the aluminum foil surface with molecular sieve coating material and let it stand at room temperature for a period of time to allow it to dry naturally; (4) Heat treatment: Place the aluminum foil coated with molecular sieve into an oven and bake it to form a dense molecular sieve coating. The cleaning in step (2) includes removing surface oil and metal oxides; The deoxidation process in step (2) involves immersing the aluminum foil in a solution containing an acidic oxidant.

2. The method for preparing a corrosion-resistant and pollution-resistant molecular sieve coated aluminum foil according to claim 1, characterized in that, The heat treatment in step (4) is performed at a temperature between 150°C and 250°C for a time between 30 min and 2 h.

3. The method for preparing a corrosion-resistant and pollution-resistant molecular sieve coated aluminum foil according to claim 2, characterized in that, In step (4), the molecular sieve in the molecular sieve coating material accounts for 10%-50% of the total mass.

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