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A kind of composite photocatalytic fiber and its preparation method

A technology of composite photocatalysis and composite light, which is applied in the field of photocatalytic materials and can solve problems such as poor photocatalytic degradation effect

Active Publication Date: 2019-04-19
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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  • A kind of composite photocatalytic fiber and its preparation method
  • A kind of composite photocatalytic fiber and its preparation method
  • A kind of composite photocatalytic fiber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The invention provides a method for preparing a composite photocatalytic fiber, comprising the following steps:

[0024] Spin the composite photocatalyst and polyester polymer to obtain the precursor;

[0025] The composite photocatalyst inside the precursor is exposed to obtain a composite photocatalyst fiber.

[0026] In the invention, the composite photocatalyst and the polyester polymer are spun to obtain the raw silk. In the present invention, the polyester polymer is preferably polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, polyethylene naphthalate , polybutylene succinate, polylactic acid, polyester elastomer and polyglycolide or a mixture of several substances, specifically one, two, three, four, five one, six, seven or eight.

[0027] In the present invention, the polyester polymer is polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, A copolymer of several ...

Embodiment 1

[0077] Weigh 10 parts of composite photocatalyst (with 80% TiO 2 and 20% g-C 3 N 4 Composite) was added to 90 parts of PET polyester for melt spinning to obtain a precursor with a fiber diameter of 20 μm. Then, the precursor that takes by weighing 100g adds alkali weight reduction bath with the bath ratio of 1:30 (the concentration of sodium hydroxide is 5g / L, and the concentration of accelerator cetyltrimethylammonium bromide is 0.4g / L , water temperature 80°C) for 60 minutes, then washed with water until neutral, placed in an oven at 60°C and dried flatly to obtain a composite photocatalytic fiber. Weigh its quality, and calculate its alkali reduction rate to be 13%.

[0078] In the present invention, the composite photocatalytic fiber obtained in this embodiment is subjected to sulfaquinoxaline (SQX, the concentration is 2×10 -5 mol / L) for photocatalytic degradation experiments, the experimental results are as follows figure 1 said, figure 1 It is the photocatalytic d...

Embodiment 2

[0081] Weigh 8 parts of composite photocatalyst (with 89% TiO 2 , 10% g-C 3 N 4 Composite with 1% zinc phthalocyanine) was added into 92 parts of PBT polyester for melt spinning to obtain a precursor with a fiber diameter of 25 μm. Then, the precursor that takes by weighing 100g adds alkali weight reduction bath with the bath ratio of 1:50 (the concentration of sodium hydroxide is 8g / L, and the concentration of accelerator cetyltrimethylammonium bromide is 0.4g / L , water temperature 90°C) for 60 minutes, then washed with water until neutral, placed in an oven at 60°C and dried flatly to obtain composite photocatalytic fibers. Weigh its quality, calculate its alkali reduction rate of 25%.

[0082] The present invention tested the composite photocatalytic fiber obtained in this example according to the method of Example 1, and the test results showed that the degradation activity and cycle degradation performance of the composite photocatalytic fiber provided in this example ...

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Abstract

The invention provides a composite photocatalytic fiber and a preparation method thereof, which includes the following steps: spinning the composite photocatalyst and a polyester polymer to obtain raw fibers; and exposing the composite photocatalyst inside the raw fibers. , to obtain composite photocatalytic fibers. The invention uses polyester polymer and composite photocatalyst as raw materials. After spinning the raw materials into raw fibers, the composite photocatalyst in the raw fibers is exposed, so that the fibers have photocatalytic activity. Experimental results show that the composite photocatalytic fiber provided by the present invention has a very high degradation rate of sulfaquinoxaline and can completely degrade all sulfaquinoxaline in about 2.5 hours; with a cycle of 5 minutes, after 15 cycles Afterwards, good degradation activity can still be maintained.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a 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 substances tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/92D01F1/10D01F11/08D01D1/02B01J31/38B01J35/06A62D3/17A62D101/26A62D101/28
CPCA62D3/17D01D1/02D01F1/10D01F6/92D01F11/08B01J31/38A62D2101/26A62D2101/28B01J35/58B01J35/39
Inventor 吕汪洋王希祎李楠徐铁凤陈文兴
Owner ZHEJIANG SCI-TECH UNIV
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