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A kind of silver-plated special-shaped polyvinyl alcohol fiber, preparation method and application thereof

A technology of polyvinyl alcohol fiber and polyvinyl alcohol, applied in the direction of fiber type, fiber treatment, fiber chemical characteristics, etc., can solve the problem of low catalytic activity, achieve improved catalytic activity, small change in shear viscosity, and cross-sectional irregularity controllable effect

Active Publication Date: 2021-12-28
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of silver-plated special-shaped polyvinyl alcohol fiber, preparation method and application thereof, to solve the problem of low catalytic activity of existing fiber-loaded silver nanoparticle catalysts

Method used

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  • A kind of silver-plated special-shaped polyvinyl alcohol fiber, preparation method and application thereof
  • A kind of silver-plated special-shaped polyvinyl alcohol fiber, preparation method and application thereof
  • A kind of silver-plated special-shaped polyvinyl alcohol fiber, preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The preparation method of the silver-plated special-shaped polyvinyl alcohol fiber of the present embodiment may further comprise the steps:

[0047] (1) Immerse the profiled polyvinyl alcohol fiber into a silver nitrate solution with a concentration of 0.05g / mL for 3 minutes to obtain the profiled polyvinyl alcohol fiber fully swollen by the silver nitrate solution;

[0048] Wherein, in the preparation of the special-shaped polyvinyl alcohol fiber in step (1), the special-shaped spinneret microholes of the spinneret adopt a four-lobed shape, and its special-shape degree is 50%.

[0049] Its special-shaped polyvinyl alcohol fiber preparation comprises the following steps:

[0050] (i) Melt spinning the chemically modified polyvinyl alcohol powder on the extrusion-spinning equipment, after melt extrusion, filtration and metering, it is ejected from the special-shaped spinning micropores, and the melt is The special-shaped polyvinyl alcohol primary fiber is prepared by b...

Embodiment 2

[0058] The preparation method of the silver-plated special-shaped polyvinyl alcohol fiber of the present embodiment may further comprise the steps:

[0059] (1) Immerse the profiled polyvinyl alcohol fiber into a silver nitrate solution with a concentration of 0.1 g / mL for 30 minutes to obtain the profiled polyvinyl alcohol fiber fully swollen by the silver nitrate solution;

[0060] Wherein, in the preparation of the special-shaped polyvinyl alcohol fiber in step (1), the special-shaped spinneret microholes of the spinneret are flat and wavy, and the degree of special shape is 90%.

[0061] Its special-shaped polyvinyl alcohol fiber preparation comprises the following steps:

[0062] (i) Melt spinning the chemically modified polyvinyl alcohol powder on the extrusion-spinning equipment, after melt extrusion, filtration and metering, it is ejected from the special-shaped spinning micropores, and the melt is The special-shaped polyvinyl alcohol primary fiber is prepared by blow...

Embodiment 3

[0071] The preparation method of the silver-plated special-shaped polyvinyl alcohol fiber of the present embodiment may further comprise the steps:

[0072] (1) Dip the special-shaped polyvinyl alcohol fiber into a silver nitrate solution with a concentration of 0.5g / mL for 30 minutes to obtain a special-shaped polyvinyl alcohol fiber fully swollen by the silver nitrate solution;

[0073] Wherein, in the preparation method of the special-shaped polyvinyl alcohol fiber in step (1), the special-shaped spinning micropores of the spinneret adopt a trilobal shape, and the degree of special shape is 75%.

[0074] It includes the following steps:

[0075](i) The physically modified polyvinyl alcohol powder is melt-spun on extrusion-spinning equipment, and after melt extrusion, filtration and metering, it is ejected from the special-shaped spinning micropores, and the melt is Cooling with side air blowing in a thin stream to prepare shaped polyvinyl alcohol primary fibers; wherein, t...

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Abstract

The invention discloses a silver-plated special-shaped polyvinyl alcohol fiber, a preparation method and an application thereof, and belongs to the technical field of fiber-loaded catalysts. It comprises the following steps: immersing special-shaped polyvinyl alcohol fibers in a silver nitrate solution with a concentration of 0.05-0.5g / mL for 3-30min to obtain special-shaped polyvinyl alcohol fibers fully swollen by the silver nitrate solution; The vinyl alcohol fibers are subjected to reduction reaction after being cleaned and dried to obtain silver-plated special-shaped polyvinyl alcohol fibers. The special-shaped polyvinyl alcohol fiber adopted in the invention has high strength, large degree of special shape and good shape retention, and can improve the catalytic activity of the silver-plated special-shaped polyvinyl alcohol fiber as a catalyst.

Description

technical field [0001] The invention relates to the technical field of fiber-supported catalysts, in particular to a silver-plated special-shaped polyvinyl alcohol fiber, a preparation method and an application thereof. Background technique [0002] p-Nitrophenol wastewater is a kind of phenol wastewater, which belongs to aromatic compounds and is a kind of protoplasmic poison. It mainly comes from chemical enterprises, such as coking plants and petrochemical plants. It has strong three properties and can be biodegraded Poor properties, long-term retention in the environment, enrichment will seriously endanger human health, phenolic wastewater has been listed as one of the harmful wastewater that needs to be addressed in our country. The degradation methods of nitrophenolic wastewater mainly include physical adsorption and chemical oxidation , advanced oxidation and biodegradation. Although p-nitrophenol is one of the common refractory pollutants in industrial and agricultur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/83B01J31/06C07C213/02C07C215/76D01F6/34D01F6/14D01F6/50D01F1/10D01D5/253D01D5/12D01D10/02D06M101/24
CPCD06M11/83B01J31/06C07C213/02D01F6/34D01F6/14D01F6/50D01F1/10D01D5/253D01D5/12D01D10/02B01J2231/641D06M2101/24C07C215/76
Inventor 陈宁王萌
Owner SICHUAN UNIV
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