Self-restoring, waterproof, tunable microstructural shape memory triboelectric nanogenerator for self-powered water temperature sensor

By Jiaqing Xiong, Hongsheng Luo, Dace Gao, Xinran Zhou, Peng Cui, Gurunathan Thangavel, Kaushik Parida, Pooi See Lee. Nano Energy, 2019

143 citations recorded by the source corpus.

Abstract The thermal induced temporal changes of microstructured shape memory polymer for self-recovery triboelectric nanogenerator can be indigenously harnessed for water energy harvesting and water temperature sensing, simultaneously. Here, tunable microarchitectures of a thermally triggered shape memory polymer are realized by electrospinning, namely mats of microfibers (MFs), microspheres (MSs), and microspheres-nanofibers (MSNFs). The tunable microarchitectured shape memory triboelectric nanogenerators (mSM-TENG) exhibit self-restoring ability in both macro shape and micro morphology, while attaining enhanced and alterable triboelectric output (∼150–320 V, ∼2.5–4 μA cm−2) due to increased frictional effects enabled by the high surface roughness. Typically, the MFs mat is realized as a skin-contact-driven shape memory TENG, serving well as wearable power source due to variable temporary shapes that are realizable under heating. At the micro level, self-restoring capability enabled by thermal stimuli renders the deformed mats capable of restoring to the original microstructures, affording the durable TENGs with prolonged lifetime. By the aid of a cellulose oleoyl ester, waterproof mat based TENGs with retentive rough surface are attainable for harvesting energy from both cold and hot water. Accordingly, a deformed waterproof TENG is found to be recoverable in shape under hot water. The gradient surface roughness delivers distinguishable triboelectric outputs during the structural recovery process, enabling a water energy harvester with sensing ability for water temperature (25 ± 5 °C to 95 °C), promising for self-powered waterproof wearable electronics and smart wastewater management system.

Subfields: Biomaterials, Biomedical Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/357f784d47419c9284c09032c304139aa803b933

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In Biomedical Engineering

1. Xinge Guo
2. Chengkuo Lee
3. Long Liu
4. Tianyiyi He
5. Feng Wen
6. Qiongfeng Shi
7. Bowei Dong
8. Jianxiong Zhu

In Polymers and Plastics

1. Chengkuo Lee
2. Xinge Guo
3. Long Liu
4. Tianyiyi He
5. Qiongfeng Shi
6. Feng Wen
7. Philippe Vachon
8. Yanqin Yang

Citations in the corpus

• Progress in TENG technology—A journey from energy harvesting to nanoenergy and nanosystem (2020, methodology): “reported a shape memory TENG based on PU as well.(322) The electrospun technique is applied in their work to fabricate PU film with microarchitectures including mats of microfibers, microspheres, and microspheres-nanofibers to increase the roughness of triboelectric materials so as to enhance the ou”