CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Pengpeng Liu,Shu Liu,Fanglv Zhou,Yuan Lei,Lixia Bao,Yinghao Zhang,Jiefei Sui,Yifan Jia,Weibo Kong,Jiliang Wang
Harnessing both ultraviolet (UV) light energy from sunlight and the kinetic energy generated by human locomotion—such as walking and jogging—poses a significant challenge. In this study, we present a self-powered hybrid nanogenerator (hNG) that integrates a low-work function polyurethane (FPU)-coated zinc foil, a high-work function polytetrafluoroethylene (PTFE)-covered copper substrate, and an electron-supplementary layer. The synthesized FPU macromolecules exhibit electron-insulating properties while incorporating functional photoisomer and ionic liquid units. By exploiting the synergistic effects of neglected internal photoelectricity and triboelectricity, our hNG achieves impressive performance metrics: an open-circuit voltage of approximately 11 V, a short-circuit current of 130 μA, and a power density of 1 W m −2 under UV illumination at 150 µW cm −2 —similar to natural solar irradiation in Kunming—and during periodic contact-separation cycles at 5 Hz between the FPU and PTFE layers. These results significantly outperform those of traditional FPU-PTFE-based triboelectric nanogenerators. After rectification, the hNG serves as a power source for various applications, including illuminating a YNU-shaped LED strip, powering lasers, and operating a battery-free timer. Notably, outdoor tests demonstrate that the flexible hNG can activate a wireless sound transmitter, an SOS-type LED belt, and a light-and-sound alarm when exposed to direct sunlight. The self-powered sound transmitter effectively broadcasts preset SOS and coordinate signals, which can be received by a radio and displayed on a smartphone. This hybrid nanogenerator not only efficiently harvests wasted UV light energy from sunlight but also shows considerable potential for self-powered emergency rescue signaling applications.
研究领域:
材料科学
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能源技术
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Bingqian Zhao,Xiaolong He,Wenjian Li,Hang Zhang,Han Liu,Hua Qiu,Peng Gu,Kunlin Chen
Hydrogels offer significant potential for use in wearable soft electronic devices. However, their application faces considerable challenges in outdoor emergencies or extreme environments where a power supply is unavailable. In this study, multi-touch microcapsules with phase change properties were prepared by coating nanogold through silica as Pickering particles. Subsequently, the microspheres were integrated into a silicone oil-modified polyacrylate hydrogel with self-healing capabilities, resulting in the fabrication of a hydrogel strain sensor that exhibits precise self-healing and self-powered functionality. The mechanical properties of the hydrogel sensor can be modified by adjusting the polymer composition. Due to the multi-contact structure of nano-gold on the surface of microcapsules and the dynamic boronic ester bond interaction, the hydrogel sensor possesses precision self-healing capability. In addition, the hydrogel sensors demonstrate high sensitivity, which can accurately detect some subtle human motions, such as joint flexion. Importantly, the synthesized composite hydrogel exhibits self-powered performance, which could be helpful for rescue operations in outdoor or extreme environments. This study provides helpful results that can be used in the development of wearable soft electronics based on conductive hydrogels.
研究领域:
材料科学
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生物医学工程
✓ 已验证
DOI
高影响因子
FUEL
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2023
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IF 7.4
Jia Li,Zhiyuan Shen,Tao Wang,Xiaoyu Chen,Fubao Zhou
CO is an invisible killer that severely threatens the safety of trapped personnel in fire disasters. The existing CO removal approaches are passive and ineffective, which could not satisfy the emergency rescue needs. An active and synchronous CO removal approach (ASCR) based on catalytic oxidation is proposed. By spraying dry powder extinguishant and catalyst powder, the isolation layer and oxidation layer are formed on the fuel surface. CO removal is achieved by both combustion suppression and CO oxidation methods. The synthesized Co-La 0.1 catalyst exhibited superior catalytic activity, thermal stability , and selectivity, which met the application requirements of the ASCR approach. The results of lab-scall tests demonstrated that the CO concentration in the smoke flow decreased from 135 ppm to 0 ppm immediately once employing the ASCR approach. Full-scale tests in the confined tunnel further verified the practical application performance. With spraying 2 kg extinguishant and 0.9 kg catalyst powder, CO concentration increased merely by ∼ 20 ppm within 50 min, which was far lower than that without taking any disposal measures (∼800 ppm). This approach can effectively control the CO concentration below the safety threshold in fire disasters and is significant for emergency rescue.
研究领域:
消防安全
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催化
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
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2025
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IF 4
Chen Sixian,Fu Jun,Lin Qianbing,Wu Yibo,Shi Qisong
Flexible sensors, due to their unique advantages, are anticipated to find applications in electronic skin, human monitoring, human–computer interaction, and other fields. Among these, flexible strain sensors have garnered significant attention owing to their broad detection range, high sensitivity, and robust anti-interference capability. This paper presents a method for constructing a uniform conductive network within a thermoplastic polyurethane (TPU) matrix by incorporating ionic liquids (ILs) and carbon black nanoparticles (CB). The resulting flexible strain sensor exhibits sensitivities of 1.16 and 2.15 at 0–60% and 60–200% strain levels, respectively. This sensor can accurately monitor various tensile signals and demonstrates response recovery times of 130 ms and 98 ms in tensile mode, and 191 ms and 195 ms in bending mode. Its output signal remains stable after over 200 cycles of 50% strain, indicating excellent durability and stability. Finally, by encapsulating and sewing it onto clothing, it can generate SOS distress signals in two ways, making it a potential tool for emergency calls. This flexible strain sensor showcases superior performance and immense potential in the realm of wearable electronics. Graphic abstract
研究领域:
柔性电子学
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可穿戴传感器
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材料科学
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应急救援技术
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人机交互
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）