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A kind of preparation method of polyurethane-based composite photocatalytic film

A composite photocatalysis and polyurethane technology, which is applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc., can solve the problems of poor mechanical properties, difficult recycling, and limited Application and other issues, to achieve the effect of easy recycling, uniform particle size and good stability

Active Publication Date: 2021-10-19
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silk fibroin immobilized nano-silver antibacterial powder has defects such as poor mechanical properties and difficulty in recycling, which greatly limits its application.

Method used

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  • A kind of preparation method of polyurethane-based composite photocatalytic film
  • A kind of preparation method of polyurethane-based composite photocatalytic film
  • A kind of preparation method of polyurethane-based composite photocatalytic film

Examples

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Effect test

Embodiment 1

[0042] One of the embodiments of the preparation method of a polyurethane-based composite photocatalytic membrane of the present invention comprises the following steps:

[0043] Step 1. Preparation of polyurethane solution: Weigh 16 grams of polyester thermoplastic polyurethane particles with a Shore hardness of 55A, disperse them in 84 grams of N,N-dimethylformamide solvent, stir well at room temperature, and obtain a mass fraction of 16 % polyurethane polymer solution;

[0044] Step 2, preparing the coating solution: adding silk fibroin powder with a specification of 10 μm and a solid content of 55% to the above-mentioned polyurethane polymer solution with a mass fraction of 16%, and stirring evenly to obtain a coating solution;

[0045] Step 3. Prepare the polyurethane / silk fibroin blend film: let the coating solution stand for 30 minutes, evenly coat it on the release paper after defoaming, and control the film by adjusting the thickness of the coating solution coated on ...

Embodiment 2

[0051] One of the embodiments of the preparation method of a polyurethane-based composite photocatalytic membrane of the present invention comprises the following steps:

[0052] Step 1: Preparation of polyurethane solution: Weigh 20 grams of polyester thermoplastic polyurethane particles with a Shore hardness of 65A, disperse them in 80 grams of N,N-dimethylformamide solvent, stir well at room temperature, and obtain a mass fraction of 20 % polyurethane polymer solution;

[0053] Step 2: Prepare a coating solution: add silk fibroin powder with a specification of 10 μm and a solid content of 70% to the polyurethane polymer solution with a mass fraction of 20% above, and stir evenly to obtain a coating solution;

[0054] Step 3: Prepare the polyurethane / silk fibroin blend film: let the coating solution stand for 30 minutes, quickly and evenly coat it on the release paper after defoaming, and control the thickness of the coating solution coated on the release paper by adjusting ...

Embodiment 3

[0060] One of the embodiments of the preparation method of a polyurethane-based composite photocatalytic membrane of the present invention comprises the following steps:

[0061] Step 1: Preparation of polyurethane solution: Weigh 17 grams of polyester thermoplastic polyurethane particles with a Shore hardness of 60A, disperse them in 83 grams of N,N-dimethylformamide solvent, stir well at room temperature, and obtain a mass fraction of 17 % polyurethane polymer solution;

[0062] Step 2: Prepare coating solution: add silk fibroin powder with a specification of 8 μm and a solid content of 60% to the polyurethane polymer solution with a mass fraction of 17% above, and stir evenly with a magnetic stirrer to obtain a coating solution;

[0063] Step 3: Prepare the polyurethane / silk fibroin blend film: let the coating solution stand for 30 minutes, quickly and evenly coat it on the release paper after defoaming, and control the thickness of the coating solution coated on the releas...

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Abstract

The invention discloses a preparation method of a polyurethane-based composite photocatalytic film. The polyurethane particles are fully dissolved in a solvent to obtain a polyurethane solution; silk fibroin powder is added to the polyurethane solution, stirred evenly, and defoamed to obtain a coating liquid; The coating liquid is evenly coated on the release paper, and the film is quickly immersed in the aqueous solution to solidify into a film, then take out, dry, and peel off the release paper to obtain a polyurethane / silk fibroin blend film; immerse the polyurethane / silk fibroin blend film in a silver nitrate solution Take it out after being absorbed in the middle to avoid light, then immerse it in sodium chloride solution, take out, wash, and dry to obtain the AgCl material supported by the polyurethane / silk fibroin blend film; the AgCl material supported by the polyurethane / silk fibroin blend film is irradiated under a UV lamp , the polyurethane-based composite photocatalytic film was obtained. Provide its application in degrading organic pollutants in water and sterilizing and disinfecting. The invention has the characteristics of easy availability of materials, good catalytic performance, easy recovery and no secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of organic-inorganic hybrid materials, and in particular relates to a preparation method of a polyurethane-based composite photocatalytic film. Background technique [0002] The control and regulation of environmental pollution has always been one of the major problems to be solved urgently in human society. Among many environmental pollution control technologies, traditional technologies such as carbon adsorption and air separation only transfer and dilute organic or inorganic pollutants, but do not fundamentally decompose them into non-toxic substances, and there is a great possibility of causing Secondary pollution; and the method of oxidation or ozone treatment is not only expensive but also has many side effects. Noble metal nanoparticles are used as photocatalytic materials because of their surface plasmon resonance effect, which can significantly improve the response in the visible light band and imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/30B01J35/10A01P1/00C02F1/32C02F101/34C02F101/38
CPCC02F1/32B01J31/30C02F2101/34C02F2101/38C02F2305/10B01J35/39B01J35/61
Inventor 周虎王晓虹王桃芬许建雄刘欢汤龙王思甜
Owner HUNAN UNIV OF SCI & TECH
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