Natural super-hydrophilic porous TiO2/SiO2 composite thin film and preparation method thereof

A super-hydrophilic, composite film technology, applied in the direction of solid-state chemical plating, coating, metal material coating technology, etc., can solve the problems of unsatisfactory super-hydrophilic performance and achieve the effect of improving super-hydrophilicity

Inactive Publication Date: 2012-10-10
SOUTH CHINA UNIV OF TECH
View PDF2 Cites 59 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is in order to overcome existing TiO 2 The shortcomings of the film's unsatisfactory superhydrophilic performance under visible light conditions, and a porous TiO 2 / SiO 2 Composite film preparation method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Natural super-hydrophilic porous TiO2/SiO2 composite thin film and preparation method thereof
  • Natural super-hydrophilic porous TiO2/SiO2 composite thin film and preparation method thereof
  • Natural super-hydrophilic porous TiO2/SiO2 composite thin film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] At room temperature of 25°C, mix 10ml of tetraethyl orthosilicate and 40ml of absolute ethanol and stir for 30 minutes to make a stock solution (referred to as solution B): mix 20ml of absolute ethanol, 2.5ml of deionized water, 1ml of concentrated nitric acid (weight The fraction is about 65%, the same below) and mixed thoroughly to form a drop solution (referred to as solution A). Add solution A dropwise to solution B under strong stirring, continue to stir for 2 hours after the dropwise addition, and then seal and age for about 48 hours in the dark to form a stable SiO 2 Sol.

[0028] At room temperature of 25°C, mix 10ml of tetrabutyl titanate and 40ml of absolute ethanol and stir for 30min, then add 2ml of acetylacetone and 1.5ml of diethanolamine as a complexing agent for titanium alkoxide, fully mix all the added solutions, and prepare Make stock solution (denoted as D solution); 20ml absolute ethanol, 10ml deionized water, 1ml concentrated nitric acid are fully...

Embodiment 2

[0032] At 40°C, mix 10ml of tetraethyl orthosilicate and 40ml of absolute ethanol and stir for 30 minutes to prepare a stock solution (referred to as solution B): fully mix 20ml of absolute ethanol, 2ml of deionized water, and 0.5ml of concentrated nitric acid. Dubbed drop solution (referred to as A solution). Add solution A dropwise to solution B under strong stirring, continue to stir for 2 hours after the dropwise addition, and then seal and age for about 48 hours in the dark to form a stable SiO 2 Sol.

[0033] At 40°C, mix 10ml of tetrabutyl titanate and 40ml of absolute ethanol and stir for 30min, then add 2ml of acetylacetone and 0.5ml of ethanolamine as a complexing agent for titanium alkoxide, fully mix all the added solutions, and make a stock solution (referred to as D solution); 20ml of absolute ethanol, 10ml of deionized water, and 0.5ml of concentrated nitric acid are fully mixed to form a drop solution (referred to as C solution). Add solution C dropwise to so...

Embodiment 3

[0040] At 60°C, mix 10ml of tetraethyl orthosilicate and 30ml of absolute ethanol and stir for 30 minutes to make a stock solution (referred to as solution B): fully mix 20ml of absolute ethanol, 5ml of deionized water, and 1.5ml of concentrated nitric acid. Dubbed drop solution (referred to as A solution). Add solution A dropwise to solution B under strong stirring, continue to stir for 2 hours after the dropwise addition, and then seal and age for about 48 hours in the dark to form a stable SiO 2 Sol.

[0041] At 60°C, mix 10ml of tetrabutyl titanate and 40ml of absolute ethanol and stir for 30min, then add 2ml of acetylacetone and 4ml of triethanolamine as a complexing agent for titanium alkoxide, fully mix all the added solutions, and make a stock solution (referred to as D solution); 20ml of absolute ethanol, 10ml of deionized water, and 1.5ml of concentrated nitric acid were fully mixed to form a dropwise solution (referred to as C solution). Add solution C dropwise to...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
pore sizeaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention relates to a natural super-hydrophilic porous TiO2/SiO2 composite thin film and a preparation method thereof. The preparation method comprises the following steps of: adopting a sol-gel method and respectively taking tetrabutyl titanate and ethyl orthosilicate as precursors to prepare TiO2 sol and SiO2 sol; calculating according to the molar fraction, compounding through taking the addition quantity of the SiO2 sol as 1-50 percent of total contents of SiO2 and TiO2 to obtain TiO2/SiO2 composite sol; and coating the prepared composite sol on a substrate material, airing, calcining and cooling to obtain the super-hydrophilic thin film. The natural super-hydrophilic porous TiO2/SiO2 composite thin film and the preparation method thereof have the beneficial effects that the thin film prepared by the method has the double effects of phase separation-induced developed hole structure and SiO2 compounding, the aperture of the thin film is within the scope of 100 nm-6 mum, the thickness of the thin film is within the scope of 200 nm-20 mum, a contact angle of the surface of the thin film with water is below 5 degrees, and the self-cleaning, antifogging and antibacterial functions are optimal.

Description

technical field [0001] The invention relates to a composite film, especially a kind of natural superhydrophilic porous TiO 2 / SiO 2 Composite film and method for its preparation. Background technique [0002] superhydrophilic TiO 2 Due to their excellent optical, chemical, and hydrophilic properties, thin films have broad application potential in self-cleaning, anti-fog, antibacterial, anti-corrosion, biomedical applications, drug delivery systems, solar cells, heat transfer, etc. But since TiO 2 It has a large forbidden band width of 3.2eV, and the utilization rate of light energy is very low. Only ultraviolet light can induce TiO 2 produces superhydrophilicity, which leads to TiO 2 Thin films have yet to achieve large-scale practical applications. Currently preparing TiO 2 Thin film methods mainly include cathodic electrochemical deposition, anodic oxidation, electrospinning, hydrothermal method, chemical vapor deposition, magnetron sputtering, pulsed laser depositi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/23C04B41/85C23C20/08
Inventor 黄洪黄涛司徒粤谢德龙黄伟欣
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap