A self-powered triboelectric nanosensor for detecting the corrosion state of magnesium treated by micro-arc oxidation

Magnesium (Mg) is frequently used as a biocompatible implantable material in the human body, but real-time detection of its corrosion state is not well understood. Fortunately, previous studies of triboelectric nanogenerators (TENG) as self-driven sensors in many fields have proposed solutions for t...

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Bibliographic Details
Published in:RSC advances 2019-01, Vol.9 (18), p.10159-10167
Main Authors: Zhai, Yong-Mei, Li, Wei, Chen, Min-Fang, Li, Yan-Kun, Wang, Qi, Wang, Yan-Song
Format: Article
Language:English
Subjects:
Biocompatibility
Biomedical materials
Body fluids
Chemistry
Corrosion
Electric power generation
Human body
Immersion tests (corrosion)
In vitro methods and tests
Magnesium
Nanogenerators
Nanosensors
Oxidation
Polydimethylsiloxane
Real time
Sensors
Sheets
Silicone resins
Surgical implants
Weight reduction
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Summary:Magnesium (Mg) is frequently used as a biocompatible implantable material in the human body, but real-time detection of its corrosion state is not well understood. Fortunately, previous studies of triboelectric nanogenerators (TENG) as self-driven sensors in many fields have proposed solutions for this problem. In this work, Mg-based TENG was prepared as a self-driven sensor to detect the corresponding corrosion state of Mg treated by micro-arc oxidation (MAO-Mg). Mg-based sheets and polydimethylsiloxane (PDMS) film were used as triboelectric materials. The output of TENG was optimal under 350 V-800 Hz micro-arc oxidation (MAO) treatment of Mg, and the , and were 48.5 V, 35.3 μA and 44.2 nC, which were respectively 2.42, 3.42 and 3.27 times that of the untreated devices. Moreover, a linear relationship was found in simulated body fluid (SBF) immersion tests, showing that the rates of decrease in and were respectively 3.48 and 2.74 times the weight reduction rates of MAO-Mg sheets, indicating that our sensors successfully detected the corrosion of MAO-Mg. This work will lay a preliminary foundation for real-time detection of Mg as an implant in the human body (as do other implantable materials), and demonstrates a potential new application for TENG in the biomedical field.
ISSN:2046-2069
2046-2069
DOI:10.1039/c8ra10398d