Journal
CHEMICAL ENGINEERING JOURNAL
Volume 398, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.125626
Keywords
Electrospinning; Dielectric property; Electret mechanism; Air filtration
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Funding
- National Natural Science Foundation of China [51973028, 51925302]
- Fundamental Research Funds for the Central Universities [223201900081, CUSF-DH-D-2017019]
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials [ZR1902]
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A one-step and controllable strategy to prepare all-polymer hybrid electret fibers is reported based on the coupling of polystyrene and polyvinylidene fluoride in electric response. The complementary dielectric properties between PS and PVDF generate dual-system electret charges within PS/PVDF fibers, thereby improving the electret effect. The bi-component all-polymer electret fibers show enhanced electret property and structural continuity, contributing to a N95 protective respirator with high filtration efficiency (99.752%), low air resistance (72 Pa) and long service life. The fabrication of all-polymer electret fibers solves the challenge of nanoparticle toxicity for existing polymer/nanoparticle electret fibers.
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