单位:[1]Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China[2]Huazhong Univ Sci & Technol,Tongji Hosp,Tongji Med Coll,Dept Ophthalmol,Wuhan 430074,Peoples R China眼科华中科技大学同济医学院附属同济医院[3]TuoRen Med Device Res & Dev Inst Co Ltd, Henan Key Lab Med Polymer Mat Technol & Applicat, Changyuan 453000, Henan, Peoples R China
Face masks, which serve as personal protection equipment, have become ubiquitous for combating the ongoing COVID-19. However, conventional electrostatic-based mask filters are disposable and short-term effective with high breathing resistance, causing respiratory ailments and massive consumption (129 billion monthly), intensifying global environmental pollution. In an effort to address these challenges, the introduction of a piezoelectric polymer was adopted to realize the charge-laden melt-blown via the melt-blowing method. The charge-laden melt-blown could be applied to manufacture face masks and to generate charges triggered by mechanical and acoustic energy originated from daily speaking. Through an efficient and scalable industrial melt-blown process, our charge-laden mask is capable of overcoming the inevitable electrostatic attenuation, even in a high-humidity atmosphere by long-wearing (prolonging from 4 to 72 h) and three-cycle common decontamination methods. Combined with outstanding protective properties (PM2.5 filtration efficiency >99.9%), breathability (differential pressure <17 Pa/cm(2)), and mechanical strength, the resultant charge-laden mask could enable the decreased replacement of masks, thereby lowering to 94.4% of output masks worldwide (similar to 122 billion monthly) without substituting the existing structure or assembling process.
基金:
National Natural Science Foundation Council of China [52075196]; Fundamental Research Funds for the Central Universities [2016YXZD059]