Preparation method of super-hydrophilic functional membrane

A functional membrane and superhydrophilic technology, applied in the field of functional membranes, can solve the problems of narrow response range and short duration of superhydrophilicity of thin films, and achieve simple and feasible preparation methods, good stability and high surface roughness Effect

Inactive Publication Date: 2018-11-16
陶玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the TiO prepared by this preparation method 2 The superhydrophilicity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1:

[0021] A preparation method of super-hydrophilic functional film, including modified TiO 2 Preparation of sol, SiO 2 -TiO 2 The preparation of the sol and the preparation of the super-hydrophilic functional film specifically include the following steps:

[0022] 1) Modified TiO 2 Preparation of the sol: At room temperature, mix the tetrabutyl titanate precursor, complexing agent and 2 / 3 volume of the required alcohol solution and stir for 30 min to obtain light yellow solution A, and then add 1 / 3 volume of the required alcohol solution. The alcohol solution, deionized water and non-metal dopant are mixed thoroughly, and ultrasonically dispersed to obtain solution B. Solution B is slowly added dropwise to light yellow solution A. After the addition, continue to stir for 120 minutes to obtain a light yellow uniform and transparent sol. Sealed and protected from light for 24h at room temperature to obtain modified TiO 2 Sol, prepared TiO 2 Good sol stability, obvio...

Example Embodiment

[0031] Example 2:

[0032] A preparation method of super-hydrophilic functional film, including modified TiO 2 Preparation of sol, SiO 2 -TiO 2 The preparation of the sol and the preparation of the super-hydrophilic functional film specifically include the following steps:

[0033] 1) Modified TiO 2 Preparation of the sol: At room temperature, mix the ethyl titanate precursor, complexing agent and 2 / 3 volume of the required alcohol solution and stir for 30 minutes to obtain a light yellow solution A, and then add 1 / 3 volume of the required alcohol The solution, deionized water and non-metal dopant are mixed thoroughly, and ultrasonically dispersed to obtain solution B. Solution B is slowly added dropwise to light yellow solution A. After the addition, continue to stir for 120 minutes to obtain a light yellow uniform and transparent sol, and finally room temperature Sealed and protected from light and aged for 24 hours to obtain modified TiO 2 Sol

[0034] 2) SiO 2 -TiO 2 Preparation...

Example Embodiment

[0042] Example 3:

[0043] A preparation method of super-hydrophilic functional film, including modified TiO 2 Preparation of sol, SiO 2 -TiO 2 The preparation of the sol and the preparation of the super-hydrophilic functional film specifically include the following steps:

[0044] 1) Modified TiO 2 Preparation of the sol: At room temperature, mix the tetrabutyl titanate precursor, complexing agent and 2 / 3 volume of the required alcohol solution and stir for 40 minutes to obtain a light yellow solution A, and then add 1 / 3 volume of the required alcohol solution. The alcohol solution, deionized water and non-metal dopant are mixed thoroughly, and ultrasonically dispersed to obtain solution B. Solution B is slowly added dropwise to light yellow solution A. After the addition, continue to stir for 120 minutes to obtain a light yellow uniform and transparent sol. Sealed and protected from light for 24h at room temperature to obtain modified TiO 2 Sol

[0045] 2) SiO 2 -TiO 2 Preparation...

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Abstract

The invention discloses a preparation method of a super-hydrophilic functional membrane. The preparation method comprises the following steps: firstly, taking titanate sol as a TiO2 precursor, acetylacetone as a complexing agent and a non-metal dopant as a modifier to prepare the modified TiO2 sol, then performing reflux ageing on tetraethoxysilane, KH560 solution, ethanol and deionized water to obtain SiO2 sol, then adding the prepared SiO2 sol into the modified TiO2 sol to obtain SiO2-TiO2 sol, coating the SiO2-TiO2 sol with film, and carrying out heat treatment to prepare SiO2-TiO2 super-hydrophilic functional membrane. The preparation method disclosed by the invention is simple and feasible, efficient and environment-friendly, and the reaction process is easy to control and is suitablefor industrial production; the prepared super-hydrophilic functional film is rough in microscopic surface, small in contact angle and high in hydrophilicity, the super-hydrophilicity can be respondedunder the action of visible light and can be kept for a long time under the irradiation of visible light.

Description

technical field [0001] The invention relates to the technical field of functional membranes, in particular to a preparation method of a superhydrophilic functional membrane. technical background [0002] The super-hydrophilic film will make the contact angle of small water droplets on the surface of the film close to 0° (generally up to 10°). When water touches the surface of the film, it will spread rapidly on the surface to form a uniform water film. superhydrophilic properties. With the continuous development of science and technology, super-hydrophilic films have attracted the attention of many scientific researchers because of their unique properties. At present, there are many methods for preparing super-hydrophilic films, mainly including sol-gel method, hydrothermal method, Liquid phase deposition method, self-assembly preparation method, etc., but due to the complicated preparation process and the limitation that it is not suitable for large-area film formation, su...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/14C04B35/46
CPCC04B35/14C04B35/46C04B35/62218C04B2235/3232C04B2235/3418C04B2235/656C04B2235/6567
Inventor 陶玲
Owner 陶玲
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