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Tannic acid modified graphene/CNT three-dimensional conductive network for preparing high-performance transparent
Tao Wang1, Li-Chao Jing1, Qingxia Zhu1
1Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tiangong University, Tianjin 300387, China.
Journal of Colloid and Interface Science
|June 3, 2020
Summary
This study introduces eco-friendly tannic acid (TA) modified graphene and carbon nanotubes (CNTs) for transparent flexible heaters (TFHs). These nanocomposite-based TFHs show excellent performance, stability, and efficiency for various applications.
Area of Science:
- Materials Science
- Nanotechnology
- Polymer Science
Background:
- Carbon nanotubes (CNTs) and graphene are promising nanomaterials for advanced applications.
- Developing eco-friendly and efficient methods for modifying nanomaterials is crucial.
- Transparent flexible heaters (TFHs) require materials with high conductivity, transparency, and mechanical stability.
Purpose of the Study:
- To utilize tannic acid (TA) as an eco-friendly modifier for CNTs and graphene.
- To fabricate high-performance transparent flexible heaters (TFHs) using TA-functionalized nanocomposites.
- To evaluate the thermal, electrical, and mechanical properties of the fabricated TFHs.
Main Methods:
- Tannic acid (TA) was used as a non-covalent modifier for carbon nanotubes (CNTs).
- Microfluidization was employed to exfoliate graphite to graphene using TA.
- Conductive nanocomposites (TA-functionalized graphene/TA-functionalized CNT/PEDOT:PSS) were integrated into a waterborne polyurethane (WPU) film to create TFHs.
Main Results:
- The fabricated TFH film exhibited high optical transmittance (ca. 80% at 550 nm) and low sheet resistance (62.5 Ω/sq.).
- The TFH demonstrated excellent mechanical stability, maintaining performance after 1000 bending cycles.
- The TFHs reached a steady state temperature of 116 °C within 20 s at 20 V, with no degradation after repeated heating-cooling and long-term tests.
Conclusions:
- Tannic acid is an effective eco-friendly modifier for graphene and CNTs.
- The developed TA-functionalized nanocomposite-based TFHs offer high performance, durability, and thermal efficiency.
- These TFHs show significant potential for applications in defogging, smart windows, portable heating, and wearable devices.
