As an important thermal management technology, radiant heating is famous for its high thermal efficiency, medium-free operation, good penetration and compatibility with different heating forms. In order to promote the sustainable development in this field, it is urgent to develop advanced infrared radiation materials. In this paper, the team of Academician Liu Zhongfan of Peking University published a paper entitled "Graphene Glass Fiber Fabric with Double Emitters for Radiation Heating" on ACS Nano. Using chemical vapor deposition (CVD), a lightweight and flexible double emitter infrared electrothermal material-Graphene Glass Fiber (GGF) was developed with graphene and glass fiber as radiation elements. Large area GGFF fabric (GGFF) shows high infrared emissivity (0.92) and thermal radiation efficiency (79.4%) independent of wavelength, ultra-fast electrothermal response (190.7cs–1at 9.30WCM–2) and uniform heating temperature. GGFF is superior to traditional alloy heating wire in radiation heating capacity, and can save energy by 33.3%. GGF can promote the development of efficient and energy-saving thermal management technology.
Graphic reading guide
Figure 1. Preparation of GGFB and GGFF by chemical vapor deposition
Figure 2. Infrared radiation characteristics of GGFF
Figure 3. Comparison of infrared radiation ability of metal resistance wire, GGFB and GGFF.
Figure 4. Infrared electrothermal performance of GGFF
summary
Light and flexible GGF, including GGFB and large area GGFF, was successfully prepared by chemical vapor deposition as an advanced composite material. The obtained GGFs combines the excellent properties of graphene and glass fiber, especially their infrared radiation characteristics. In this way, the dual emitter GGF shows tunable, wavelength-independent, high infrared emissivity and high thermal radiation efficiency, as well as ultra-fast electrothermal response and uniform heating temperature. By changing the temperature coefficient, the emission band of GGF can be adjusted to adapt to different absorption scenarios. When used as a radiant heater, GGF has better radiant heating ability than traditional alloy heating wire, saving energy >: 30%. GGFs is expected to become a new generation of lightweight, flexible and energy-saving infrared electrothermal materials, which has the potential to be widely used in thermal management.
Literature:
https://doi . org/ 10. 102 1/ACS na no . 1c 09269