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Preparation method of superhydrophobic silica fiber

A silicon dioxide and super-hydrophobic technology, applied in the direction of silicon oxide and nanotechnology, can solve the problems of small diameter and poor hydrophobic performance, and achieve the effect of huge application prospects

Inactive Publication Date: 2014-06-11
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problem that the silica fiber prepared by the existing method is small in diameter, resulting in poor hydrophobic performance, and provides a method for preparing superhydrophobic silica fiber

Method used

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  • Preparation method of superhydrophobic silica fiber
  • Preparation method of superhydrophobic silica fiber
  • Preparation method of superhydrophobic silica fiber

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Experimental program
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specific Embodiment approach 1

[0023] Specific embodiment 1: In this embodiment, a method for preparing superhydrophobic silica fibers is carried out according to the following steps: 1. Under the condition that the stirring speed is 200-300rpm, the mass percentage content of 17-19mL is 2% Mix 79-81mL of ammonia water and 79-81mL of absolute ethanol evenly, after heating to 60°C, add 2.1-2.3mL of tetraethyl orthosilicate, keep the above temperature and rotation speed constant and continue the reaction for 24h, and obtain the silica seed emulsion ;

[0024] 2. Under the condition of stirring speed of 150-200rpm, add 155-165mL of absolute ethanol and 14-16mL of concentrated ammonia water into the three-necked flask and stir to mix evenly, then in the water bath temperature of 25°C, stirring speed of 150-200rpm Add 1.9~2.1mL of silica seed emulsion dropwise under the condition of 150~200rpm and continue to stir for 15~20min, and drop 440~460mL of A solution into the three-necked bottle at a speed of 0.1mL / min....

specific Embodiment approach 2

[0032] Specific embodiment 2: This embodiment differs from specific embodiment 1 in that: in step 1, 18 mL of ammonia water with a mass percentage of 2% and 80 mL of absolute ethanol are uniformly mixed. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0033] Specific embodiment three: this embodiment is different from specific embodiment one or two in that: in step one, 2.2 mL of tetraethyl orthosilicate is added. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method of superhydrophobic silica fiber, relates to a preparation method of silica fiber, and solves the problems of traditional preparation that the prepared silica fiber is low in diameter which leads to poor hydrophobicity. The preparation method comprises the steps as follows: 1. preparing silica seed emulsion; 2, preparing silica microballoon emulsion; 3, preparing silica emulsion; 4, preparing polyvinyl alcohol solution; 5, preparing spinning solution; 6, spinning through a wet spinning way so as to obtain the silica microballoon fiber; 7, knitting the silica microballoon fiber on a monocrystalline silicon wafer in a two-dimensional way; transferring same into a muffle furnace for processing, and then cooling; and 8, dipping the cooled monocrystalline silicon wafer into fluorosilane ethanol solution to obtain the superhydrophobic silica fiber. The superhydrophobic silica fiber prepared according to the method provided by the invention has a structure in combination of micron and nanometer, therefore, the superhydrophobicity can be achieved; and the superhydrophobic silica fiber can be widely applied to a plurality of water resisting devices.

Description

technical field [0001] The invention relates to a preparation method of silica fiber. Background technique [0002] Due to the surface-independent properties of superhydrophobic membranes, it has broad application prospects in national defense, daily life and many industrial fields, so its research has attracted much attention. The wettability of solid surface is one of the basic characteristics of materials, which is mainly determined by the chemical composition and microscopic geometric structure of the material surface. In general, superhydrophobic surfaces can be prepared by two methods: building rough structures on hydrophobic surfaces or modifying low surface energy substances on rough surfaces. Since the surface energy of each material is certain, it is more important to control the rough structure of the solid surface. Experiments show that the microstructure and nanostructure on the solid surface, especially the combination of micron and nanostructure, can better ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/113B82Y40/00
Inventor 孙立国常金辉赵冬梅季大千汪成
Owner HEILONGJIANG UNIV