![]() Therefore, the high-temperature carbonization of face masks can not only inactivate viruses but also be used to prepare porous carbon materials.Ĭarbonizing waste polymer materials is one of the most promising recycling methods. Face mask is mainly made of polypropylene non-woven fabric, which has a lot of fiber structure and porosity. Therefore, it is necessary to increase the added value of waste face masks through safe recycling and utilization. Moreover, face masks directly discarded into dustbins are easily utilized by illegal merchants, resulting in viral transmission. These methods require high energy cost and cause great damage to the environment. Currently, waste face masks cannot be recycled, and most of them are treated by incineration and landfill like ordinary polymer wastes. ![]() With the mass production of face masks, the proposal of waste face masks has become a major problem. According to incomplete statistics, about 1.94 trillion face masks and gloves are consumed worldwide each month. The consumption of face masks has exploded. During the epidemic, face masks became one of the essential supplies in social interactions. These findings indicate that the novel carbonization technology in this study can not only be used to obtain high-performance supercapacitor electrode materials but also provide a new idea for the recycling and utilization of wastes such as medical devices.Īt present, COVID-19 epidemic has spread worldwide, the severity of which is unprecedented. Besides, the assembled solid-state capacitor possesses a good energy density of 10.4 W h kg −1 at a power density of 600 W kg −1, and excellent cycling stability with a capacitance retention rate of 81.1% after 3000 cycles. This porous structure has a high specific capacitance, namely 328.9 F g −1 at a current density of 1 A g −1. The waste masks were first sulfonated in an autoclave, then used as carbon source and turned into a dense hollow fiber porous structure after a one-step heat treatment. This study aims to develop a new method for the safe and high-added value reuse of materials for polypropylene face masks based on carbonization of porous polymer. The spread of COVID-19 has led to an explosive increase in the number of waste polypropylene face masks worldwide, landfill and incineration of which will cause serious pollution and resource waste.
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