Zhai Yong-Mei, Li Wei, Chen Min-Fang, Li Yan-Kun, Wang Qi, Wang Yan-Song
School of Materials Science and Engineering, Tianjin University of Technology 391 of West Bin Shui Road, Xiqing District Tianjin 300384 China
Tianjin Key Lab for Photoelectric Materials & Devices, Tianjin University of Technology 391 of West Bin Shui Road Tianjin 300384 China.
RSC Adv. 2019 Apr 1;9(18):10159-10167. doi: 10.1039/c8ra10398d. eCollection 2019 Mar 28.
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.
镁（Mg）常被用作人体中的生物相容性可植入材料，但其腐蚀状态的实时检测尚不清楚。幸运的是，先前关于摩擦纳米发电机（TENG）作为许多领域自驱动传感器的研究已经为这个问题提出了解决方案。在这项工作中，制备了基于镁的TENG作为自驱动传感器，以检测经微弧氧化处理的镁（MAO-Mg）的相应腐蚀状态。基于镁的薄片和聚二甲基硅氧烷（PDMS）薄膜被用作摩擦电材料。在350 V - 800 Hz的镁微弧氧化（MAO）处理下，TENG的输出最佳，其开路电压、短路电流和电荷量分别为48.5 V、35.3 μA和44.2 nC，分别是未处理器件的2.42倍、3.42倍和3.27倍。此外，在模拟体液（SBF）浸泡试验中发现了线性关系，表明开路电压和短路电流的下降速率分别是MAO-Mg薄片重量减轻速率的3.48倍和2.74倍，这表明我们的传感器成功检测到了MAO-Mg的腐蚀。这项工作将为镁作为人体植入物（以及其他可植入材料）的实时检测奠定初步基础，并展示了TENG在生物医学领域的潜在新应用。
