A superhydrophilic tio 2 Thin film and its preparation method
A super-hydrophilic and omentum technology, applied in separation methods, chemical instruments and methods, immiscible liquid separation, etc., can solve the problem of low adhesion of crude oil, achieve stable impact resistance, good wear resistance, excellent The effect of mechanical stability
Active Publication Date: 2020-05-26
HARBIN INST OF TECH +1
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Problems solved by technology
where TiO 2 and SnO 2 The antigenic oil performance of the coating film is far superior to that of ZnO and Al 2 o 3 coating film, but TiO 2 and SnO 2 Coated polymer film has very low adhesion to crude oil in both water and air after wetting with water
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Embodiment 1
[0035] Embodiment 1: superhydrophilic TiO in the present embodiment 2 The omentum is deposited on a 400-mesh stainless steel mesh using atomic layer deposition technology, using titanium tetraisopropoxide and deionized water as precursors. 2 Thin film; Specifically, carry out according to the following steps:
[0036] Step 1. Clean the 400-mesh stainless steel mesh with absolute ethanol ultrasonically for 2 times, each time for 15 minutes, and then use N 2 Blow-dry, then oxygen plasma cleaning: first vacuumize for 5 minutes, dark purple light can be seen from the light-transmitting port, then pass in oxygen for 10 minutes, pink light appears at the light-transmitting port, then turn off the instrument, take out the substrate, and complete Pretreatment of substrate;
[0037] Step 2. Use titanium tetraisopropoxide and deionized water as the precursor, nitrogen as the carrier gas, the pressure in the reaction chamber is 0.1torr, the deposition temperature is 200°C, the temperat...
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Abstract
The invention relates to a super-hydrophilic TiO2 film and a preparation method thereof, and belongs to the technical field of oil and water separation. A net film obtained by the method has a coarsescale-shaped bionic nanometer structure, can perform high-efficiency and high-flux oil and water separation, and has high wear resistance and self-cleaning property under ultraviolet irradiation. Thesuper-hydrophilic TiO2 net film is prepared by depositing a TiO2 film on a stainless steel net by adopting an atom layer deposition technology and by taking titanium tetraisopropoxide and deionized water as precursors. Due to the scale-shaped bionic structure on the surface of the TiO2 net film, in a light oil and water mixture, oil cannot replace water to enter a structure gap after the gap of the nanometer structure is occupied by water; and separation of a heavy oil and water mixture is subjected to the joint upward action force of capillary driving pressure and capillary side wall adhesionresistance besides a stable water film, so that separation of light oil, heavy oil and water mixtures is realized.
Description
technical field [0001] The invention belongs to the technical field of oil-water separation; be specifically related to a kind of superhydrophilic TiO 2 The method of film preparation. Background technique [0002] With the continuous deepening of the industrialization process, oil spill accidents and the discharge of oily wastewater have caused serious threats to the environment and human beings. For these oil-water waste liquids, traditional treatment methods are mainly based on the principles of gravity separation, centrifugation, chemical oxidation, and bioremediation. Among them, gravity separation has low cost and wide application range, but it is often limited by filter materials or filter equipment, resulting in low separation efficiency, high energy consumption and easy to cause secondary pollution. Innovating filter equipment requires high costs, while optimizing filter materials requires low cost and strong pertinence. Therefore, super-wet filter membranes for ...
Claims
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IPC IPC(8): B01D17/022
CPCB01D17/02B01D17/0202
Inventor 李杨吴晓宏卢松涛秦伟
Owner HARBIN INST OF TECH