Method for preparing nanometer titanium dioxide super-hydrophobic film

A nano-titanium dioxide and super-hydrophobic technology is applied in the field of preparation of super-hydrophobic films, which can solve the problems of difficult and large-scale manufacturing, harsh experimental conditions, and high manufacturing costs, and achieves high stability, good acid and alkali resistance, and low preparation costs. Effect

Inactive Publication Date: 2015-08-05
TIANJIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

However, most of these methods have high production costs, complicated processes, and harsh experime

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  • Method for preparing nanometer titanium dioxide super-hydrophobic film
  • Method for preparing nanometer titanium dioxide super-hydrophobic film
  • Method for preparing nanometer titanium dioxide super-hydrophobic film

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Embodiment

[0024] A preparation method of nano titanium dioxide superhydrophobic film, the steps are as follows:

[0025] 1. Preparation of hydrophobic nano-titanium dioxide: Hydrothermal method is used to prepare nano-titanium dioxide. Based on hydrolysis reaction, titanium tetra-n-propoxide that undergoes hydrolysis reaction under natural conditions is selected as the titanium source, and the crystal form is obtained by controlling the reaction conditions. Good nano-titanium dioxide is used to prepare composite materials, the steps are as follows:

[0026] 1) Inject 20mL of ultrapure water and 0.2mL of tert-butylamine into the lining of a polytetrafluoroethylene reactor successively to obtain an aqueous phase; mix 20mL, 5mL of oleic acid and 0.35mL of titanium tetra-n-propoxide evenly to obtain an oil phase; The oil phase is introduced into the lining of the polytetrafluoroethylene reactor, and mixed with the water phase to obtain a mixed solution;

[0027] 2) Put the polytetrafluoroe...

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Abstract

Disclosed is a method for preparing a nanometer titanium dioxide super-hydrophobic film. Nanometer titanium dioxide is prepared by a hydrothermal method, on basis of hydrolysis reaction, titanium n-propoxide with hydrolysis reaction under natural conditions is selected as a titanium source, nanometer titanium dioxide with good crystal form is obtained through controlling of reaction conditions and used for preparing a composite material, anatase-type crystal form is used for preparing a super-hydrophobic thin film, and then the super-hydrophobic thin film is formed after modification by low surface energy substance stearic acid. The method for preparing the nanometer titanium dioxide super-hydrophobic film has the advantages that the method is low in preparation costs, simple and rapid, a contact angle of the prepared super-hydrophobic film is water contact angle of hydrophobic nanometer titanium dioxide, which is 95.3 degrees, rolling angle is 0-4 degrees, grain size of nanometer titanium dioxide is about 7nm, grain dispersibility and stability are good, effects are still good though the nanometer titanium dioxide super-hydrophobic film is put in air for a period of time, acidic and alkali resistance is good, and the nanometer titanium dioxide super-hydrophobic film can be used for resisting water, freezing and metallic corrosion.

Description

technical field [0001] The invention relates to the preparation of a super-hydrophobic film, in particular to a preparation method of a nano-titanium dioxide super-hydrophobic film. Background technique [0002] In recent years, with extensive research on wettability, people have realized that superhydrophobic membranes have huge potential applications in self-cleaning, microfluidic systems and special separations, so the preparation of superhydrophobic membranes has also become the focus of attention. . According to the classical Young's equation, the surface energy directly determines the wettability of the surface. To improve the hydrophobicity, the surface energy of the surface substance must be reduced as much as possible. Although low surface energy substances can enhance the hydrophobicity of the membrane surface, it still cannot exceed 120°. On the other hand, the rough surface structure is also closely related to the hydrophobicity of the membrane. Therefore, redu...

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Application Information

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IPC IPC(8): C03C17/23
Inventor 魏臻周余飞时旷怡张志梅刘学文
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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