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Method for Improving the Bonding Force Between Anodized Titanium Nanotube Array Film and Titanium Substrate

A nanotube array, anodized titanium technology, applied in the field of electrochemistry, can solve problems such as improving the performance of supercapacitors hindering TNTA films, and achieve the effects of eliminating internal stress at the interface, easy operation, and improved electrochemical performance.

Active Publication Date: 2020-01-24
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the existing technology, using 100-250 μm thick titanium foil can only prepare 9.5-15.6 μm thick non-shedding TNTA film. Once the film thickness is greater, the TNTA film will spontaneously curl off from the titanium substrate, seriously At the same time, the trend of device miniaturization requires thinner titanium foil (thickness less than 20 μm), but it is impossible to prepare 9.5-15.6 μm thick titanium foil on such a thin titanium foil. exfoliated TNTA membrane

Method used

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  • Method for Improving the Bonding Force Between Anodized Titanium Nanotube Array Film and Titanium Substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The size, pretreatment and anodizing conditions of the titanium foil are the same as those in Comparative Example 1. After the anodic oxidation of the prepared TNTA film is completed, in the same electrolyte, a small current anodic oxidation post-treatment is performed, and the current density is 1mA cm -2 , the time is 5min. The thickness of the TNTA film is about 9.7 μm. Finally, the same annealing treatment as in Comparative Example 1 was carried out, and the prepared TNTA film was intact and did not fall off from the titanium substrate. The test conditions of the mechanical properties are the same as those of Comparative Example 1, and the measured shear strength is 2.54 MPa.

Embodiment 2

[0030] The size, pretreatment and anodizing conditions of the titanium foil are the same as those in Comparative Example 1. After the anodic oxidation of the prepared TNTA film is completed, in the same electrolyte, a small current anodic oxidation post-treatment is performed, and the current density is 1mA cm -2 , the time is 10min. The thickness of the TNTA film is about 9.7 μm. Finally, the same annealing treatment as in Comparative Example 1 was carried out, and the prepared TNTA film was intact and did not fall off from the titanium substrate. The test conditions of the mechanical properties are the same as those of Comparative Example 1, and the measured shear strength is 2.26MPa.

Embodiment 3

[0032]The size, pretreatment and anodizing conditions of the titanium foil are the same as those in Comparative Example 1. After the anodic oxidation of the prepared TNTA film is completed, in the same electrolyte, a small current anodic oxidation post-treatment is performed, and the current density is 1mA cm -2 , the time is 2min. The thickness of the TNTA film is about 9.7 μm. Finally, the same annealing treatment as in Comparative Example 1 was carried out, and the prepared TNTA film was intact and did not fall off from the titanium substrate. The test conditions of the mechanical properties are the same as those of Comparative Example 1, and the measured shear strength is 2.01 MPa.

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Abstract

The invention discloses a method for increasing binding force between an anodic titanium oxide nanometer tube array film and a titanium substrate. According to the method, the titanium oxide nanometertube array film is prepared by adopting a general constant-current or constant-voltage anodic oxidation method; subsequently small-current or small-voltage short-time constant-current or constant-voltage anodic oxidation treatment is carried out in the same electrolyte; finally annealing treatment is carried out; and thus the binding force between the titanium oxide nanometer tube array film andthe titanium substrate can be remarkably increased and can preferably meet the requirements of practical application. The method disclosed by the invention is simple and convenient to operate; the electrolyte needs not to be replaced; internal stress caused by over-large volume expansion and relatively poor plasticity of the metallic titanium in a growth process of an oxidation film can be effectively released; the binding force between the oxidation film and the titanium substrate is remarkably increased; and the method is also applicable to flexible thin titanium sheets.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and relates to a method for improving the binding force between an anodized titanium nanotube array film and a titanium substrate. Background technique [0002] Anodic oxide titanium nanotube arrays (anodic TiO 2 Nanotube array (TNTA for short) has the characteristics of vertically oriented structure, relatively high spatial order and controllable geometric structure. In recent years, TNTA has been widely used in many fields due to its unique physical and chemical properties, such as solar cells, supercapacitors, hydrogen production from water splitting, photocatalysis, and biomaterials. In particular, due to its high specific surface area, in-situ growth by anodic oxidation on titanium sheets, excellent electrochemical stability and wide potential window, TNTA as an electrode material for supercapacitors has attracted great attention from researchers at home and abroad. Attention has b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/26
CPCC25D11/26
Inventor 宋晔曹世凯黄文强吴丽珍朱绪飞
Owner NANJING UNIV OF SCI & TECH
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