Preparation method of fusiform silicon dioxide composite fiber

A technology of silica and composite fibers, applied in fiber processing, fiber chemical characteristics, electrospinning, etc., can solve the problems of poor interface bonding with polymer matrix, uneven distribution of inorganic phases, uneven bead size, etc. Achieve the effect of easy mass production, uniform inorganic phase distribution, and large aspect ratio

Pending Publication Date: 2022-02-08
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Technical problem: the purpose of the present invention is to overcome the deficiencies in the prior art, to provide a preparation method of spindle-shaped silica composite fiber, to solve the problems of uneven distribution of inorganic phase, poor interface bonding with polymer matrix, The problem of uneven bead size and poor shape controllability, thus broadening the application field of traditional silica fiber materials

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  • Preparation method of fusiform silicon dioxide composite fiber
  • Preparation method of fusiform silicon dioxide composite fiber
  • Preparation method of fusiform silicon dioxide composite fiber

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preparation example Construction

[0031] The preparation method of the spindle-shaped silica composite fiber of the present invention uses polymers and silica precursors as main raw materials; the silica precursors are hydrolyzed under the action of an acidic catalyst to form silica sol; silica The sol is mixed with the polymer solution to obtain a uniform and viscous mixed solution; the mixed solution is made of a smooth surface, uniform bead size, high dispersibility and good hydrophilicity by using electrospinning technology fiber; the specific steps are as follows:

[0032] (1) The polymer powder is dissolved in an organic solvent to obtain a clear, viscous polymer solution; the polymer is polyacrylonitrile (PAN), polyvinylpyrrolidone (PVP), polymethylmethacrylate One or both of (PMMA); the organic solvent is one or both of N,N-dimethylformamide, dimethylacetamide, dimethyl sulfoxide; the polymer and The mass volume ratio of organic solvent is 0.05~0.3:1g / ml;

[0033] (2) After the silica precursor is mi...

Embodiment 1

[0036] Embodiment 1: Weigh 0.2g PAN and PVP powder in glass container respectively, after adding N,N-dimethylformamide therein, stir 12h under the condition of 600rpm, the mass volume ratio that obtains polymer and organic solvent is 0.15:1g / ml PAN / PVP mixed solution; under the catalysis of 1mol / L HCl solution, hydrolyze methyl orthosilicate for 4h to obtain a uniform silica sol; pipette the silica sol with a pipette gun, Add it into the PAN / PVP mixed solution and stir it well for 2 hours to obtain PAN-PVP-SiO with a silicon dioxide content of 20%. 2 Mixture; extract PAN-PVP-SiO with a glass needle 2 For the mixed solution, set the electrostatic field voltage to 15KV, the flow rate to 1ml / h, and the distance from the tip of the glass needle tube to the receiving plate to be 15cm, so that the PAN-PVP-SiO 2 The spinning solution forms spindle-shaped fibers under the action of electrostatic field repulsion and surface tension, and is received on a receiving plate with aluminum f...

Embodiment 2

[0038] Example 2: Weigh 0.08g of PAN and PVP powder respectively in a glass container, add N,N-dimethylformamide / dimethyl sulfoxide to it, the volume ratio is 8:2, and stir at 800rpm for 24h , to obtain a PAN / PVP mixed solution with a mass volume ratio of polymer to organic solvent of 0.06:1g / ml; under the catalysis of 1mol / L HCl solution, hydrolyze methyl orthosilicate at 60°C for 2h to obtain a uniform Silica sol: pipette the silica sol with a pipette gun, add it to the PAN / PVP mixture, and stir thoroughly for 4 hours to obtain PAN-PVP-SiO with a silica content of 30%. 2 Mixture; extract PAN-PVP-SiO with a glass needle 2 For the mixed solution, set the electrostatic field voltage to 20KV, the flow rate to 1.5ml / h, and the distance from the tip of the glass needle to the receiving plate to be 13cm, so that the PAN-PVP-SiO 2 The spinning solution forms spindle-shaped fibers under the action of electrostatic field repulsion and surface tension, and is received on a receiving p...

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Abstract

The invention discloses a preparation method of a fusiform silicon dioxide composite fiber, and belongs to the field of preparation of micro-nano composite materials. A polymer and a silicon dioxide precursor are used as main raw materials, and the fusiform silicon dioxide composite fiber is prepared through a sol-gel combined electrostatic spinning technology. The method comprises the following steps: firstly, dissolving a polymer in a proper solvent to prepare a viscous solution; fully hydrolyzing the silicon dioxide precursor under an acidic condition to form clear silicon dioxide sol; mixing the sol with a polymer solution, and continuously stirring to obtain a uniform mixed solution; and preparing the obtained mixed solution into the fusiform composite fiber which is smooth in surface, uniform in bead size, high in dispersity and good in hydrophilicity by adopting an electrostatic spinning technology. The method has the advantages of simple process, good repeatability, low energy consumption and low cost, and effectively avoids the agglomeration problem of inorganic nanoparticles in the composite fiber obtained by the traditional mechanical mixing method. The composite fiber can be used as a medicine carrier, a filtering or adsorbing material in environmental treatment, a tissue engineering scaffold and the like.

Description

technical field [0001] The invention relates to the field of preparation of micro-nano composite materials, in particular to a method for preparing spindle-shaped silica composite fibers prepared by using sol-gel combined with electrospinning technology. Background technique [0002] Fiber materials have been widely used in various fields due to their advantages such as high specific surface area and high porosity. However, with the improvement of people's living standards and the rapid development of the consumer market, the performance of traditional single fiber can no longer meet the growing needs of people. The composite fibers that have appeared in recent years are favored because they combine the performance advantages of multiple materials and can effectively avoid the performance defects of a single fiber. [0003] Composite fiber refers to two or more substances, or chemical fibers made by composite spinning of substances with the same components but different pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/08D01F8/10D01F1/10D01D5/00D01D5/20
CPCD01F8/08D01F8/10D01F1/10D01D5/003D01D5/20
Inventor 滕淑华周华建王鹏
Owner CHINA UNIV OF MINING & TECH
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