Preparation method of bi-pass large-area TiO* nanotube array film

Abstract

The invention discloses a preparation method of a bi-pass large-area TiO2 nanotube array film, which includes the following steps of: preparing a first-grade preliminary product through the anodic oxidation of a pretreated titanium sheet; obtaining a second-grade preliminary product by cleaning the first-grade product with de-ionized water, putting the first-grade product into a vessel with absolute ethyl alcohol, putting the vessel into an ultrasonic cleaner for ultrasonic vibration and causing the TiO2 nanotube array film to be separated from a pure titanium matrix; obtaining a third-grade preliminary product with a barrier layer at the bottom after cleaning the second-grade product with absolute ethyl alcohol and putting and drying the second-grade product in a threshold CO2 drying box; obtaining the finished product by putting the second-grade product into the mixed acid solution and removing the barrier layer at the bottom through acid cleaning; and cleaning, airing or drying the finished product after being put into the absolute ethyl alcohol. The preparation method is simple and convenient in technical operation and reasonable in design. The prepared bi-pass large-area smooth TiO2 nanotube array film has higher photoelectric efficiency and can be effectively applied in the fields of gas separation, drug delivery, bone fixation, and the like.

Description

technical field

[0001] The invention relates to the technical field of biochemistry, in particular to a double-pass large-area TiO 2 Preparation method of nanotube array film. Background technique

[0002] At present, most of the membranes used in the field of biochemistry to separate submicron particles are various, inhomogeneous and anisotropic membranes, which are polymerized by any one of polysulfone, polyacrylonitrile, polyamide, etc. material, or a ceramic membrane, such as: alumina (Millipore isopore or Whatmanfilters). The above membranes suffer from several bioincompatibilities: (a) wide pore size distribution; (b) membrane adhesion of various proteins and biomolecules leading to biofouling; (c) not easy to leach pollutants from polymer membranes. At present, most polymer membranes have a wide range of pore size distributions, up to 30%. Membranes prepared using the ion etching route (Millipore isopore) produced a narrower pore size distribution (±30%). However,...

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