Photocatalyst supported micro-nano-composite fiber material loaded and preparation method thereof

A photocatalyst, micro-nano composite technology, applied in chemical instruments and methods, physical/chemical process catalysts, fiber types, etc., can solve the problems of small specific surface area, poor pollutant adsorption capacity, etc., achieve good flexibility and avoid secondary Pollution, Ease of Recycling Effects

Active Publication Date: 2019-01-04
NANTONG TEXTILE & SILK IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned carriers have shortcomings such as small specific surface area and poor adsorption capacity for pollutants.

Method used

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  • Photocatalyst supported micro-nano-composite fiber material loaded and preparation method thereof
  • Photocatalyst supported micro-nano-composite fiber material loaded and preparation method thereof
  • Photocatalyst supported micro-nano-composite fiber material loaded and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a method for preparing a photocatalyst-loaded micro-nano composite fiber material, as follows:

[0026] Preparation of polyacrylonitrile micron fibers: Pour 10 g of polyacrylonitrile, 40 mL of dimethyl sulfoxide and 0.8 mL of water into a three-necked flask, and stir at room temperature to make it fully swell. Then heat and stir at 40° C. for 3 hours to fully dissolve the polyacrylonitrile, and put it into a vacuum drying oven at 60° C. for vacuum degassing treatment. Take the above spinning solution, and prepare polyacrylonitrile micron fiber through wet spinning device, spinning process: spinning temperature: 40 ℃; pressure: 0.2 MPa; inner diameter of spinning hole: 0.5 mm; coagulation bath: N,N- The mixture of dimethylformamide and water (Vol DMF : Vol H2O = 3:1). Finally, heat stretching treatment at 150 °C is carried out.

[0027] In-situ polymerization of conductive polymer polyaniline on the surface of polyacrylonitrile microfibers: ...

Embodiment 2

[0035] Preparation of polyimide micron fibers: 3.204 g of 4,4’-diaminodiphenyl ether and 0.433 g of p-phenylenediamine were poured into a three-neck flask, placed in an ice-water bath (0 °C), and nitrogen gas was passed for 2 h. Then, 4.450 g of pyromellitic dianhydride was added into the three-necked flask three times at equal intervals of half an hour. After reacting for 2 hours, 1.021 g of acetic anhydride and 0.791 g of pyridine were slowly added dropwise. After reacting for 2 h, the mixed solution was subjected to vacuum degassing treatment in a vacuum oven at 60 °C, and it was used as the spinning solution. The above spinning solution was taken, and polyimide fibers were prepared by a self-made wet spinning device. The spinning process: spinning temperature: 50°C; pressure: 0.2 MPa; inner diameter of the spinning hole: 0.5 mm; Water mixture (Vol methanol : Vol H2O =7:3). Finally, heat stretching treatment at 300 °C is carried out.

[0036] In-situ polymerization of ...

Embodiment 3

[0042] Preparation of polyvinyl alcohol microfibers: Pour 10 g of PVA, 39 mL of dimethyl sulfoxide and 13 mL of water into a three-neck flask, and stir continuously at 90 °C for 4 h until completely dissolved to obtain a uniform and transparent PVA solution, and then Let stand for 2 h to defoam. The above spinning solution was taken, and polyvinyl alcohol fibers were prepared by a self-made wet spinning device. The spinning process: spinning temperature: 50 °C; pressure: 0.2 MPa; inner diameter of spinning holes: 0.5 mm; coagulation bath: methanol. Finally, heat stretching treatment at 200 °C is carried out.

[0043] In-situ polymerization of conductive polymer polyaniline on the surface of polyvinyl alcohol microfibers: put a certain length of polyvinyl alcohol microfibers into a mixture of aniline (1.86 g), polyvinylpyrrolidone (2.08 g) and 40 mL of hydrochloric acid, 30 Minutes later, a mixture of ammonium persulfate (2.28 g) and 20 mL of hydrochloric acid was added, and r...

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Abstract

The invention discloses a photocatalyst supported micro-nano-composite fiber material loaded and a preparation method thereof. According to the method, a polyacrylonitrile micron fiber is prepared bythe aid of a wet spinning process, conductive high-molecular polymer polyaniline is grown on the surface of the polyacrylonitrile micron fiber in an in-situ polymerization manner, and a polyacrylonitrile nano-fiber with a photocatalyst precursor covers the conductive high-molecular polymer polyaniline by an electrostatic spinning process to form the micro-nano-composite fiber material with photocatalysis capability of visible-light response. The micro-nano-composite fiber material loaded the photocatalyst has the advantages that specific surface area is large, pollutants are highly adsorbed and can be degraded under visible light and the like. A photocatalyst composite fiber solves the problems that a powder photocatalyst is difficultly recycled, a flexible photocatalyst carrier is poor instrength, cannot be woven and the like. Application fields of the material are widened.

Description

technical field [0001] The invention relates to a functional composite material, in particular to a photocatalyst-loaded micro-nano composite fiber material and a preparation method thereof, belonging to the technical field of composite material photocatalysis. Background technique [0002] With the rapid development of the economy and the continuous growth of the population, the problems of global environmental pollution and increasing demand for energy supply have become increasingly prominent. According to statistics, factories discharge about 30 to 40 billion tons of pollutants into global waters every year, including sewage containing excessive heavy metals, toxic solvents and other wastes, causing serious environmental pollution. Sustainable development has become the path that modern society must choose . On the one hand, as a renewable energy source, solar energy has the characteristics of abundant resources, cleanness, and low cost. It can be used for free without ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J31/38B01J35/06B01J35/10D01F6/18D06M15/61D06M11/22D01F6/78D01F6/54D01F6/14D06M101/28D06M101/30D06M101/24
CPCB01J31/26B01J31/38B01J35/004B01J35/06B01J35/1004D01F6/14D01F6/18D01F6/54D01F6/78D06M11/22D06M15/61D06M2101/24D06M2101/28D06M2101/30
Inventor 秦传香郭晓飞朱明玥
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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