Synergistic antibacterial performance of rosemarinic acid - graphene oxide in electrospun polylactic acid membranes for air filtration

JOURNAL OF POLYMER RESEARCH(2023)

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摘要
Polylactic acid (PLA) is a kind of widely used, biodegradable, biomass polymer material, and the PLA fibrous material with high antibacterial efficiency has attracted more and more attention. In this article, the electrospinning (e-spinning) technique was employed to fabricate PLA nanofiber membrane and by adding the reducing natural rosmarinic acid (RosA) and graphene oxide (GO) into the e-spinning solution, it was found that RosA and GO reacted to a certain extent, which led to a stable e-spinning solution system. After carried out e-spinning, the as-prepared fiber of PLA/Rosa0.1/GO was thinner in average diameter, 520 nm, lower than those of pure PLA or PLA/RosA. The strength of the fibrous membrane was enhanced, reaching 2.4 times of pure PLA one, and its water contact angle decreased from 137° to 123°. At the same time, the as-obtained membrane of PLA/Rosa0.1/GO had high porosity (82.8%) and filtration efficiency (91.0%), with high QF value of 0.077 Pa -1 . More importantly, due to the synergy of RosA and GO, the antibacterial efficiency has been greatly improved. This electrospun nanofiber membrane has promising applications in personal protective equipment and air filtration industry.
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关键词
Electrospinning, Rosemarinic acid, Graphene oxide, synergetic antibacterial, Air filtration
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