Polylactic Acid/Calcium Stearate Hydrocharging Melt-Blown Nonwoven Fabrics for Respirator Applications

Non-biodegradable polypropylene, which poses a serious threat to the environment, is most utilized material in air filtration systems. Moreover, under conditions of high temperature and humidity, electrostatic charge melt-blown nonwoven fabrics treated with traditional corona electrets will quickly dissipate. Here, biodegradable polylactic acid, calcium stearate, an innovative hydrocharging technique are reported develop environmentally friendly acid/calcium stearate stability. Compared acid fabrics, crystallization structure storage have been greatly improved due presence stearate. In PM0.3, it exhibited efficiency (96.78%), low pressure drop (65.20 Pa), good quality factor (0.053 Pa–1), can meet N95 respirator standard. Furthermore, worth mentioning that performance remained at level (>95.00%) after 2 months. Importantly, based on test analysis surface potential, crystallization, distribution, we proposed plausible generation stable mechanisms. It demonstrated more potential for electret smart respirators as further possible step research field.