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Sheath-core composite photocatalytic fiber and method for preparing same

A technology of composite photocatalysis and composite light, which is applied in the field of photocatalytic materials, can solve the problems of poor photocatalytic degradation effect, and achieve the effects of excellent photocatalytic activity, high degradation rate, and excellent catalytic stability

Inactive Publication Date: 2017-01-11
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photocatalytic fibers provided by the prior art generally have the problem of poor photocatalytic degradation effect

Method used

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  • Sheath-core composite photocatalytic fiber and method for preparing same
  • Sheath-core composite photocatalytic fiber and method for preparing same
  • Sheath-core composite photocatalytic fiber and method for preparing same

Examples

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Effect test

preparation example Construction

[0026] The invention provides a method for preparing a skin-core composite photocatalytic fiber, comprising the following steps:

[0027] Put the skin-core composite polyester fiber into the composite photocatalyst solution, and perform padding treatment;

[0028] The fibers obtained by the padding treatment are subjected to the first heat treatment and the second heat treatment in sequence to obtain skin-core composite photocatalytic fibers.

[0029] In the invention, the sheath-core composite polyester fiber is dissolved in a composite photocatalyst solution and subjected to padding treatment. In the present invention, the core-skin composite polyester fiber includes core polyester and skin polyester; the melting point of the core polyester of the core-skin composite polyester fiber is preferably 250-270°C, more preferably 255-250°C. 265°C, most preferably 258-263°C; the melting point of the skin polyester is preferably 90-180°C, more preferably 100-160°C, most preferably 1...

Embodiment 1

[0072] Get 50g of low-melting point sheath-core composite polyester fiber, the conventional polyethylene terephthalate with a core melting point of 260°C, and the low-melting polyethylene terephthalate with a cortical melting point of 130°C, the mass ratio of the cortex 50%, short fiber shape, diameter 20μm, put it into 8g / L composite photocatalyst (TiO 2 90%, g-C 3 N 4 9.5%, unsubstituted iron phthalocyanine 0.5%) aqueous solution, the bath ratio is 1:30. Adsorb the composite photocatalyst onto the fiber by three dipping and three rolling methods, then put it in a 100°C oven for pre-baking for 30 minutes, continue to heat up to 135°C, bake for 30 minutes, wait for it to cool to room temperature, wash it with water to remove the insufficient adsorption on the fiber A firm catalyst can be dried in an oven at 60°C to obtain a skin-core composite photocatalytic fiber.

[0073] In the present invention, the skin-core composite photocatalytic fiber obtained in this embodiment is...

Embodiment 2

[0076] Weigh 100g of low-melting point sheath-core composite polyester fiber, the conventional polyethylene terephthalate with a core melting point of 260°C, the low-melting polyethylene terephthalate with a cortical melting point of 110°C, and the mass of the cortex Ratio is 60%, filament shape, diameter is 25 μm, put it into 5g / L composite photocatalyst (TiO 2 85%, g-C 3 N 4 15%) aqueous solution, bath ratio 1:40. The composite photocatalyst is adsorbed on the fiber by the method of three dipping and three rolling, and then put it in an oven at 80°C for pre-baking for 30 minutes, then continue to heat up to 110°C, bake for 40 minutes, wait for it to cool to room temperature, wash it with water to remove the insufficient adsorption on the fiber A firm catalyst can be dried in an oven at 60°C to obtain a skin-core composite photocatalytic fiber.

[0077] The present invention detects the skin-core composite photocatalytic fiber obtained in this example according to the meth...

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Abstract

The invention provides a sheath-core composite photocatalytic fiber and a method for preparing the same. The method includes steps of placing sheath-core composite polyester fibers in composite photocatalyst solution and carrying out padding treatment on the sheath-core composite polyester fibers; sequentially carrying out first heat treatment and second heat treatment on fibers obtained by means of padding treatment so as to obtain the sheath-core composite photocatalytic fiber. The sheath-core composite photocatalytic fiber and the method have the advantages that composite photocatalysts can be firmly attached onto the sheath-core composite polyester fibers by the aid of the padding treatment, polyester of core layers can have certain viscosity after the fibers are subjected to the first heat treatment and the second heat treatment, and accordingly excellent adhesion effects can be realized for the composite photocatalysts; as shown by experimental results, the sheath-core composite photocatalytic fiber is high in sulfadiazine degradation rate, and all sulfadiazine can be degraded by the sheath-core composite photocatalytic fiber in 5 hours approximately; the sulfadiazine degradation activity of the sheath-core composite photocatalytic fiber is hardly changed after the sheath-core composite photocatalytic fiber is reused by 20 times, and accordingly the sheath-core composite photocatalytic fiber is excellent in photocatalytic stability.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a skin-core composite photocatalytic fiber and a preparation method thereof. Background technique [0002] Photocatalytic oxidation is a relatively efficient and energy-saving method for degrading pollutants. By using sunlight, pollutants can be completely and effectively degraded. Photocatalytic materials are catalyzed by converting the light energy existing in nature into the energy required for chemical reactions under the irradiation of light, so that the surrounding oxygen and water molecules are excited into free negative ions with great oxidative power, and they do not change themselves. A substance that promotes a chemical reaction. [0003] Photocatalytic materials have antibacterial, air purification, deodorizing, mildew-proof, algae-proof, anti-fouling and self-cleaning functions, and can decompose almost all organic substances and some inorganic subs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J27/24B01J35/06D06M11/46D06M11/73D06M13/503C02F1/30D06M101/32C02F101/38
CPCD06M11/46D06M11/73D06M13/503C02F1/30B01J27/24B01J31/38D06M2101/32C02F2101/40C02F2305/10B01J35/58B01J35/39
Inventor 吕汪洋王希袆李楠徐铁凤陈文兴
Owner ZHEJIANG SCI-TECH UNIV
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