Seawater Degradable Triboelectric Nanogenerators for Blue Energy,Advanced Materials Technologies

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Seawater Degradable Triboelectric Nanogenerators for Blue Energy
Advanced Materials Technologies ( IF 6.4 ) Pub Date : 2020-07-15 , DOI: 10.1002/admt.202000455
Guangyao Chen _{1,

2} , Liang Xu _{1,

2} , Panpan Zhang ₁ , Baodong Chen _{1,

2} , Gexia Wang ₃ , Junhui Ji ₃ , Xiong Pu _{1,

2,

4} , Zhong Lin Wang _{1,

2,

5}

Affiliation

Triboelectric nanogenerators (TENG) have been proposed as the most promising technology to harvest water wave energy, i.e., the so‐called blue energy. Dielectric polymers are typically required for TENG to create static charges, which, however, may produce plastic litters to the ocean after its service. In this work, seawater degradable dielectric polymers are investigated for the applications in TENGs. A promising polymer blend (noted as PLA/PLGA), consisted from seawater‐degradation‐favorable poly(lactic‐co‐glycolic acid) (PLGA) and nonseawater‐degradable polylatic acid (PLA), shows a mild rate degradation in seawater and complete weight loss within 9 months. Furthermore, the PLA/PLGA is found to be tribo‐positive with excellent electrification properties, and is mechanically robust. Then, a hollow‐plate‐shaped seawater degradable TENG (SD‐TENG) is designed using PLA/PLGA as the electrification layer and Mg as the electrode, which demonstrates the ability to convert water wave vibration energy into electricity. This SD‐TENG demonstrates a clean approach to exploit the ocean wave energy, and may supply power for future temporary marine instruments without maintenances and environmental damages.

中文翻译：

用于蓝色能源的海水可降解摩擦电纳米发电机

摩擦电纳米发电机（TENG）已被提出为最有希望的技术来收集水波能量，即所谓的蓝色能量。TENG通常需要介电聚合物产生静电荷，但是使用后可能会向海洋产生塑料垃圾。在这项工作中，研究了海水可降解介电聚合物在TENG中的应用。一个有前途的聚合物共混物（记为PLA / PLGA），从海水中降解-有利由聚（乳酸-共乙醇酸（PLGA）和不可海水降解的聚乳酸（PLA）在海水中会缓慢降解，并在9个月内完全失重。此外，发现PLA / PLGA具有良好的带电性能，并且摩擦机械性能强。然后，以PLA / PLGA为带电层，以Mg为电极，设计了中空板状海水可降解TENG（SD-TENG），展示了将水波振动能转化为电能的能力。该SD‐TENG演示了一种利用海浪能量的清洁方法，并且可以为将来的临时性海洋仪器供电，而无需维护和环境破坏。

更新日期：2020-09-10

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