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Preparation and performance test of new hydroxyapatite-long nanowire-based flexible waterproof conductive fire-resistant paper: (a) Preparation process; (b) New flexible waterproof and conductive fire-resistant paper can work stably even under water, and the connected small lamp can be Continuous light emission; (c, d) Deicing process of new flexible waterproof and electrically conductive fire-resistant paper: (c) No DC voltage applied, (d) Application of DC voltage; (e) New type of flexible waterproof electrically conductive fire-resistant paper even when burned in fire It can work stably, and the connected small lamps can keep shining.
Due to its excellent performance, ability to adapt to physical deformation, and ease of use, flexible electronic devices and wearable electronic devices have become popular in recent years. However, conventional electronic devices are difficult to meet the requirements of flexibility and work under harsh environments, and the performance of electronic devices is easily affected by the surrounding environment. For example, metals are the first choice for conductive materials, but metals are susceptible to oxidation and corrosion, resulting in reduced performance and functional failure. Contaminants, moisture, rain, ice, and snow also affect the performance of electronic devices; in floods, high temperatures, or fires Electronic devices are easily destroyed. As a result, all-weather flexible electronic devices that can operate stably in severe environments are of interest.
Recently, the research team led by Zhu Yingjie, a researcher at the Shanghai Institute of Ceramics, Chinese Academy of Sciences, used hydroxyapatite ultra-long nanowires as the main raw material and carried electrical conductivity based on the research work of hydroxyapatite ultra-long nanowire refractory paper. Carbon black, and then coated with polydimethylsiloxane, developed a new type of hydroxyapatite ultra-long nanowire-based flexible waterproof conductive fire-retardant paper, integrated waterproof, conductive, electric heat, fire-retardant and other features , Can work in all kinds of harsh environments such as strong acid, strong alkali, high humidity, high temperature, underwater, ice and snow weather. Hydroxyapatite ultralong nanowires and conductive carbon blacks construct a multi-level rough structure, polydimethylsiloxane coating provides hydrophobicity, multi-level rough structure and hydrophobic synergy make flexible conductive paper with super-hydrophobicity The surface has water resistance, self-cleaning function and high thermal stability, and can withstand various harsh environments. More importantly, even if the new flexible waterproof and conductive fireproof paper is immersed in water, it can work stably, and the connected small lamp can continue to emit light. In addition, the new flexible conductive flame-retardant paper has an electric heating effect, and can rapidly heat up in a short period of time after being energized, which is expected to be applied to efficient and rapid deicing. The new flexible waterproof conductive fire-resistant paper has excellent high temperature resistance and fire resistance, and it can work stably even if it is burned in the fire. The connected small lamp can keep shining. Due to a variety of excellent properties, the new flexible waterproof conductive flame-retardant paper has a good application prospect in high-performance flexible electronic devices and wearable electronic devices. The relevant research results were published on ACS Applied Materials & Interfaces and applied for an invention patent.
The research was funded by the National Natural Science Foundation of China, the Shanghai Science and Technology Commission, and the Shanghai Institute of Ceramics Innovation Key Project of the Chinese Academy of Sciences.
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