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Method for preparing lanthanum hydroxide porous hollow nano-fiber and chain-like nano-fiber

A hollow nano, nanofiber technology, used in fiber processing, spinning solution preparation, textile and paper making, etc.

Inactive Publication Date: 2010-07-28
CHANGCHUN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the preparation of lanthanum hydroxide porous hollow nanofibers and chain nanofibers by electrospinning technology

Method used

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  • Method for preparing lanthanum hydroxide porous hollow nano-fiber and chain-like nano-fiber
  • Method for preparing lanthanum hydroxide porous hollow nano-fiber and chain-like nano-fiber
  • Method for preparing lanthanum hydroxide porous hollow nano-fiber and chain-like nano-fiber

Examples

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Embodiment 1

[0021] Example 1: Weigh a certain amount of lanthanum nitrate, dissolve it in an appropriate amount of distilled water, then weigh a certain amount of PVP and add it to the above solution, stir magnetically at room temperature for 2 hours, and let stand for 2 hours to form a spinning solution. The mass percentages of the components of the spinning solution are: lanthanum nitrate content 10%, PVP content 45%, distilled water content 45%. Add the prepared spinning solution into the liquid storage tube of the spinning device for electrospinning, the nozzle diameter is 1mm, adjust the angle between the nozzle and the horizontal plane to be 30°, apply a DC voltage of 20kV, the curing distance is 20cm, and the room temperature is 20°C , the relative humidity is 50%, and the PVP / La(NO 3 ) 3 Composite fibers. The prepared PVP / La(NO 3 ) 3 The composite fiber was heat-treated in a programmable temperature-controlled furnace with a heating rate of 2°C / min, kept at a constant temperat...

Embodiment 2

[0022] Example 2: Weigh a certain amount of lanthanum nitrate, dissolve it in an appropriate amount of distilled water, then weigh a certain amount of PVP and add it to the above solution, stir magnetically at room temperature for 4 hours, and let stand for 3 hours to form a spinning solution. The mass percentages of the components of the spinning solution are as follows: the content of lanthanum nitrate is 5%, the content of PVP is 50%, and the content of distilled water is 45%. Add the prepared spinning solution into the liquid storage tube of the spinning device for electrospinning, the nozzle diameter is 1mm, the angle between the nozzle and the horizontal plane is adjusted to 30°, a DC voltage of 25kV is applied, the curing distance is 25cm, and the room temperature is 28°C , relative humidity is 60%, get PVP / La(NO 3 ) 3 Composite fibers. The prepared PVP / La(NO 3 ) 3 The composite fiber was heat-treated in a programmable temperature-controlled furnace with a heating r...

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Abstract

The invention relates to a method for preparing lanthanum hydroxide porous hollow nano-fiber and chain-like nano-fiber, which belongs to the technical field of preparing one-dimensional inorganic nanometer materials. The method comprises: (1) a step of preparing spinning solution, which is to dissolve lanthanum nitrate and polyvinylpyrrolidone in distilled water to form spinning solution; (2) a step of preparing PVP / La(NO3)3 composite fiber, which is to adopt an electrostatic spinning technique, voltage of 20 to 25 kV, indoor temperature of 20 to 28 DEG C and relative humidity of 50 to 60 percent; (3) a step of preparing La(OH)3 porous hollow nano-fiber and chain-like nano-fiber, which is to perform heat treatment on the composite fiber. The La(OH)3 porous hollow nano-fiber consists of smaller nano-particles while the solid chain-like nano-fiber consists of bigger particles mutually connected, and the fiber is 500 to 800 nanometers in diameter and more than 100 mu m in length and belongs to the series of hexagonal crystals.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a preparation method of lanthanum hydroxide porous hollow nanofibers and chain nanofibers. Background technique [0002] Nanofiber refers to a linear material with two dimensions in the nanoscale on the three-dimensional space scale of the material, usually the radial dimension is on the order of nanometers, and the length is relatively large. Since the radial scale of nanofibers is as small as nanometers, it shows a series of characteristics, the most prominent is the large specific surface area, which increases its surface energy and activity, and then produces small size effects, surface or interface effects, and quantum size effects. , macroscopic quantum tunneling effect, etc., and therefore exhibit a series of chemical and physical (heat, light, sound, electricity, magnetism, etc.) aspects of specificity. In the prior art, there are many methods for prepar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/00D01D1/02D01D10/02D01F9/08
Inventor 董相廷王进贤刘桂霞崔启征
Owner CHANGCHUN UNIV OF SCI & TECH
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