Power generation yarn woven into "energy coat" can also generate electricity in liquid
Donghua University announced on February 21 that the research team of Professor Wang Hongzhi of the school made new progress in the field of wearable energy. Internationally renowned academic journal "Nature Communications" (Nature Communications).
The research team believes that fibers, yarns, and fabrics will become a new generation of power generation carriers. However, mature power generation technologies, such as photovoltaics, thermoelectrics, piezoelectric / triboelectrics, etc., still have challenges in combining with clothing materials and the textile industry. At present, energy textiles are difficult to produce on a large scale, the performance of energy devices is susceptible to environmental humidity, and there is still a lack of technology that uses a single yarn to generate electricity. The development of "energy clothing" still has a long way to go.
With the rapid development of wearable electronic devices, the public's demand for wearable energy is gradually increasing. Due to the limitations of traditional batteries, such as lack of flexibility, non-stretchability, and difficulty in weaving, flexible portable energy materials and devices have received a lot of attention. At present, most researches on wearable power sources have shown "wearing" forms of energy devices, which are mainly used as accessories for clothing and still lack wearing comfort. In contrast, the clothing body is a ready-made physical carrier and is a more ideal platform for wearable function integration.
The research team of Donghua University has made new progress on this basis.
The researchers used industrial-grade spinning equipment to achieve continuous and large-scale production of stretchable triboelectric yarns. This type of power generating yarn is composed of a highly elastic polymer material (rubber) and spiral metal fibers. These two types of intrinsic elastomer and non-intrinsic elastomer are combined into one by the design of the sheath-core structure, and have a coordinated strain behavior. Under the strains of stretching, bending, and twisting, the power generating yarn transfers electrons between the two internal materials, which can generate milliwatt output power.
Spinning process and physical photos of generating yarn
The researchers deeply explored the single-electrode potential well model of metal / amorphous polymer contact / separation, and found that the amorphous polymer not only serves as an isolation layer to prevent the field potential in the yarn from being eliminated by the external ambient atmosphere (gas, water, etc.), and its interface The induced charge of the electric field can be coupled with the molecules of the external atmosphere. In this study, the hypothesis of the potential / polarization coupling effect of the friction power generation device was first proposed. With the help of special sheath-core structure design and coupled-gain generator system, the power generating yarn reported in this study can self-generate without the aid of interaction with other objects, and can be applied to different atmospheres and even liquids.
Single-electrode potential well model and coupling gain generator mechanism
The researchers used an industrial-grade weaving machine to weave the power generation yarn to obtain an elastic power generation fabric, which also has the ability to work amphibiously. The power generation yarn can also be woven together with other commercially available fibers such as nylon fiber and polyacrylonitrile fiber, etc. The vapor permeability, comfort and power generation of the textile can be effectively controlled. The researchers wore "energy clothes" made of power-generating fabrics and demonstrated their functions such as charging lithium batteries for electronic devices, driving wireless signal transmission systems, and capturing human body movement postures.
Power generation fabric weaving process and wearable application demonstration
The research work has been strongly supported by funds such as the cross-disciplinary key project of basic scientific research business expenses of the central colleges and universities, the Young Talent Support Project of the China Association for Science and Technology, and the inspirational plan of Donghua University.
Elevator Door System Parts,Door Machine Frequency Converte,Belt Pulley
Suzhou FUJI Precision Elevator Co.,Ltd , https://www.profuji.com