Nanocrystalline metal oxide array with under-oil super-hydrophobicity and super-hydrophilicity reversible transition function and preparation method thereof

Abstract

The invention discloses a nanocrystalline metal oxide array with an under-oil super-hydrophobicity and super-hydrophilicity reversible transition function and a preparation method thereof. The static contact angle under the oil phase is larger than 150 degrees after the nanocrystalline metal oxide array is subjected to thermal treatment at the temperature ranging from 120 DEG C to 350 DEG C for 1 h to 4 h, and the nanocrystalline metal oxide array has super-hydrophobicity performance; the static contact angle of water under the oil phase is smaller than 10 degrees after the nanocrystalline metal oxide array is irradiated under ultraviolet light for 1 h to 2 h, the nanocrystalline metal oxide array has super-hydrophilicity performance, and the conversion from super-hydrophobicity to super-hydrophilicity is achieved; and after heating recovery is conducted for 1.5 h to 3 h at the temperature ranging from 100 DEG C to 150 DEG C, the static contact angle of water under the oil phase recovers to 150 degrees or above, the nanocrystalline metal oxide array has super-hydrophobicity performance, and the reversible conversion from super-hydrophilicity to super-hydrophobicity is achieved. According to the method, the nanocrystalline metal oxide array is prepared through an existing mature and simple method and is subjected to the processes of thermal treatment, ultraviolet irradiation and heating recovery, the function of reversible conversion from super-hydrophobicity to super-hydrophilicity under different oil phase complex environments is achieved, and therefore the application range of nanotube array intelligent conversion is widened, and important application prospects are achieved.

Description

technical field [0001] The invention relates to a nanometer metal oxide array with superhydrophobic and superhydrophilic reversible transformation functions in an oil phase environment and a preparation method thereof. Background technique [0002] In recent years, nanoarrays with such reversible surface wettability transitions by such external stimuli have attracted much attention due to their potential applications in various fields. Semiconductor oxides, due to their high band gap, can be widely used in the fields of optoelectronics, photocatalysis and wettability, and have been widely studied by scholars. In 1997, TiO was first reported 2 Nanoparticles have the function of reversible transformation from hydrophobic to superhydrophilic in air, and some scholars have successfully realized the reversible transformation from superhydrophobic to superhydrophilic in air by using ZnO nanorod arrays. However, there are few studies on the realization of the reversible transform...

AI Technical Summary

Problems solved by technology

However, there is still little research on the realization of the reversible transformation of the existing semiconductor nano-metal oxide arrays from superhydrophobic to superhydrophilic.

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