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

A nanotube array, large-area technology, applied in the field of biochemistry, can solve problems such as difficult control of pore structure and arrangement, narrow pore size distribution, and achieve high photoelectric conversion efficiency, good biocompatibility, and preparation technology. Easy to use effect

Active Publication Date: 2009-10-07
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

By testing the conductivity of water pressure and comparing with the hollow fiber polymer dialysis membrane, the research on the potential application of the nanoporous AAO sheet membrane found that although the AAO membrane has a high number of pores, that is, the pore density (>10 10 hole / cm 2 ), but the pore size distribution range is narrow (generally greater than 40nm), and the structure and arrangement of the pores are difficult to control

Method used

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

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Embodiment 1

[0022] Such as figure 1 As shown, the double-pass large-area TiO described in the present invention 2 A method for preparing a nanotube array film, comprising the following steps:

[0023] Step 1, anodic oxidation is carried out to the pretreated pure titanium sheet, and it comprises the following steps:

[0024] (1) Pretreatment of pure titanium sheet: the oxide layer on the surface of the pure titanium sheet to be treated is removed by conventional mechanical processing. The pure titanium sheet is a flat sheet with a thickness of 0.1-0.5 mm. In this step, the pretreated pure titanium sheet is a rectangular sheet. After removing the oxide layer on the surface of the pure titanium sheet to be treated, the treated pure titanium sheet is ultrasonically cleaned with deionized water, ethanol and acetone in sequence by an ultrasonic cleaner and dried in an oven.

[0025] In this example, the industrial pure titanium sheet is mechanically polished with 600# and 1000# water abrasi...

Embodiment 2

[0037] In this embodiment, the pure titanium sheet pretreated in step (2) is a rectangular sheet with a size of 100 mm×26 mm×0.3 mm. In step (3), when the pretreated pure titanium sheet is placed in the electrolytic solution for electrolytic oxidation reaction, the stainless steel foil electrode is used as the cathode, the voltage of the DC power supply used is 70V, and the oxidation temperature is 10-70°C. The time is 30h. When performing ultrasonic oscillation in step 2, the oscillation time is 0.2h. When the mixed acid solution is used to remove the barrier layer in step 4, the acidification time is 0.3-0.5 h. In this embodiment, the rest of the process steps and process parameters are the same as those in Example 1.

Embodiment 3

[0039] In this embodiment, the anhydrous organic solvent for preparing the electrolyte solution in step (1) is ethylene glycol, and the solute is NH 4 F, and the volume ratio of ethylene glycol and water is 97:3, NH 4 The mass ratio of F to the prepared electrolyte is 1.0%. The pretreated pure titanium sheet in step (2) is a rectangular sheet with a size of 100mm×26mm×0.3mm. In step (3), when the pretreated pure titanium sheet is placed in the electrolyte for electrolytic oxidation reaction, the stainless steel foil electrode is used as the cathode, the voltage of the DC power supply used is 30V, the oxidation temperature is room temperature, and the oxidation time is 70h . When performing ultrasonic oscillation in step 2, the oscillation time is 0.2h. When the mixed acid solution is used to remove the barrier layer in step 4, the acidification time is 0.4-0.5 h. In this embodiment, the rest of the process steps and process parameters are the same as those in Example 1.

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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,...

Claims

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Application Information

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IPC IPC(8): C25D11/26
Inventor 李广忠张健张文彦康新婷李亚宁
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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