Preparation method for organic-inorganic blend membrane

Abstract

The invention provides a preparation method for an organic-inorganic blend membrane. The preparation method comprises the following steps: adding a polyethylene glycol solution with a solid content of0.5% to 1% into a polyurethane polymer solution with a mass fraction of 10% to 18% so as to obtain a uniformly-dispersed polyethylene glycol-polyurethane solution; adding negative oxygen ion powder with a solid content of 12% to 18%; coating release paper with an organic-inorganic mixed liquid obtained in the previous step, immersing the release paper in water, and after the organic-inorganic mixed liquid is cured to form a membrane, taking the membrane out for washing and drying; immersing the obtained polyurethane-based membrane in a silver nitrate solution and carrying out lucifugal adsorption; sequentially adding a disodium hydrogen phosphate solution and cetyltrimethylammonium bromide into the silver nitrate solution and carrying out a lucifugal reaction; and taking out the polyurethane-based membrane, and performing cleaning and drying, to obtain the organic-inorganic blend membrane. The preparation method of the invention has the following characteristics: 1, the catalytic performance of a catalyst is improved, the specific surface area of the reaction is increased, reactive sites are increased, photocorrosion is reduced, and the service life of the catalyst is prolonged;and a substrate material is safe, non-toxic and environment-friendly.

Description

technical field

[0001] The invention belongs to the technical field of photocatalysts, and in particular relates to a preparation method of an organic-inorganic blend film. Background technique

[0002] The control and governance of environmental pollution is a major issue facing mankind in the 21st century. Among the many environmental pollution control technologies, photocatalysis technology is currently an attractive field in the utilization of solar energy. It is mainly used in environmental pollution control, photolysis of water to produce hydrogen, and catalytic CO 2 restore etc. Traditional photocatalysts are mainly divided into photocatalysts that respond to ultraviolet light and visible light. Among them, ultraviolet light accounts for less than 5% of sunlight, while visible light accounts for about 43% of sunlight. Therefore, the development of photocatalysts with higher visible light response has become an important research hotspot.

[0003] Ag 3 PO 4 It is ...

Examples

Embodiment 1

[0034] One of the embodiments of the preparation method of an organic-inorganic blend membrane of the present invention comprises the following steps:

[0035]Accurately weigh 15g of polyester-type thermoplastic polyurethane particles with a Shore hardness of 55A and 100g of N,N-dimethylformamide solution into a beaker, heat and stir at 40°C with a magnetic stirrer to make the polyurethane particles completely be dissolved in a solvent to obtain a polyurethane polymer solution with a mass fraction of 13%; accurately weigh 0.58g polyethylene glycol 1000 and dissolve it in 5g of N,N-dimethylformamide solution to obtain a completely dissolved polyethylene glycol alcohol solution; add the above-mentioned completely dissolved polyethylene glycol solution into the polyurethane polymer solution, and stir for 10 minutes with a magnetic stirrer to ensure that the polyethylene glycol solution is evenly dispersed in the polyurethane polymer solution; Add 15.76g negative oxygen ion powder...

Embodiment 2

[0038] One of the embodiments of the preparation method of an organic-inorganic blend membrane of the present invention comprises the following steps:

[0039] Accurately weigh 12g of polyester-type thermoplastic polyurethane particles with a Shore hardness of 60A and 108g of N,N-dimethylacetamide solution into a beaker, heat and stir at 45°C with a magnetic stirrer to make the polyurethane particles completely Dissolve in a solvent to obtain a polyurethane polymer solution with a mass fraction of 10%; accurately weigh 0.72g polyethylene glycol 1000 and dissolve it in 5g of N,N-dimethylformamide solution to obtain a completely dissolved polyethylene glycol alcohol solution; add the above-mentioned completely dissolved polyethylene glycol solution into the polyurethane polymer solution, and stir for 15 minutes with a magnetic stirrer to ensure that the polyethylene glycol solution is evenly dispersed in the polyurethane polymer solution; Add 20.46g negative oxygen ion powder in...

Embodiment 3

[0043] One of the embodiments of the preparation method of an organic-inorganic blend membrane of the present invention comprises the following steps:

[0044] Accurately weigh 13g of polyester-type thermoplastic polyurethane particles with a Shore hardness of 65A and 74g of N,N-dimethylacetamide solution into a beaker, heat and stir at 40°C with a magnetic stirrer to make the polyurethane particles completely be dissolved in a solvent to obtain a polyurethane polymer solution with a mass fraction of 15%; accurately weigh 0.84g polyethylene glycol 1000 and dissolve it in 5g of N,N-dimethylformamide solution to obtain a completely dissolved polyethylene glycol alcohol solution; add the above-mentioned completely dissolved polyethylene glycol solution into the polyurethane polymer solution, and stir for 15 minutes with a magnetic stirrer to ensure that the polyethylene glycol solution is evenly dispersed in the polyurethane polymer solution; Add 16.38g negative oxygen ion powder...

technical field

[0001] The invention belongs to the technical field of photocatalysts, and in particular relates to a preparation method of an organic-inorganic blend film. Background technique

[0002] The control and governance of environmental pollution is a major issue facing mankind in the 21st century. Among the many environmental pollution control technologies, photocatalysis technology is currently an attractive field in the utilization of solar energy. It is mainly used in environmental pollution control, photolysis of water to produce hydrogen, and catalytic CO 2 restore etc. Traditional photocatalysts are mainly divided into photocatalysts that respond to ultraviolet light and visible light. Among them, ultraviolet light accounts for less than 5% of sunlight, while visible light accounts for about 43% of sunlight. Therefore, the development of photocatalysts with higher visible light response has become an important research hotspot.

[0003] Ag 3 PO 4 It is ...

Examples

Embodiment 1

[0034] One of the embodiments of the preparation method of an organic-inorganic blend membrane of the present invention comprises the following steps:

[0035]Accurately weigh 15g of polyester-type thermoplastic polyurethane particles with a Shore hardness of 55A and 100g of N,N-dimethylformamide solution into a beaker, heat and stir at 40°C with a magnetic stirrer to make the polyurethane particles completely be dissolved in a solvent to obtain a polyurethane polymer solution with a mass fraction of 13%; accurately weigh 0.58g polyethylene glycol 1000 and dissolve it in 5g of N,N-dimethylformamide solution to obtain a completely dissolved polyethylene glycol alcohol solution; add the above-mentioned completely dissolved polyethylene glycol solution into the polyurethane polymer solution, and stir for 10 minutes with a magnetic stirrer to ensure that the polyethylene glycol solution is evenly dispersed in the polyurethane polymer solution; Add 15.76g negative oxygen ion powder...

Embodiment 2

[0038] One of the embodiments of the preparation method of an organic-inorganic blend membrane of the present invention comprises the following steps:

[0039] Accurately weigh 12g of polyester-type thermoplastic polyurethane particles with a Shore hardness of 60A and 108g of N,N-dimethylacetamide solution into a beaker, heat and stir at 45°C with a magnetic stirrer to make the polyurethane particles completely Dissolve in a solvent to obtain a polyurethane polymer solution with a mass fraction of 10%; accurately weigh 0.72g polyethylene glycol 1000 and dissolve it in 5g of N,N-dimethylformamide solution to obtain a completely dissolved polyethylene glycol alcohol solution; add the above-mentioned completely dissolved polyethylene glycol solution into the polyurethane polymer solution, and stir for 15 minutes with a magnetic stirrer to ensure that the polyethylene glycol solution is evenly dispersed in the polyurethane polymer solution; Add 20.46g negative oxygen ion powder in...

Embodiment 3

[0043] One of the embodiments of the preparation method of an organic-inorganic blend membrane of the present invention comprises the following steps:

[0044] Accurately weigh 13g of polyester-type thermoplastic polyurethane particles with a Shore hardness of 65A and 74g of N,N-dimethylacetamide solution into a beaker, heat and stir at 40°C with a magnetic stirrer to make the polyurethane particles completely be dissolved in a solvent to obtain a polyurethane polymer solution with a mass fraction of 15%; accurately weigh 0.84g polyethylene glycol 1000 and dissolve it in 5g of N,N-dimethylformamide solution to obtain a completely dissolved polyethylene glycol alcohol solution; add the above-mentioned completely dissolved polyethylene glycol solution into the polyurethane polymer solution, and stir for 15 minutes with a magnetic stirrer to ensure that the polyethylene glycol solution is evenly dispersed in the polyurethane polymer solution; Add 16.38g negative oxygen ion powder...

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