Structure and performance of electroblown PVDF-based nanofibrous electret filters

Adel Al Rai, Elena Stojanovska, Gizem Fidan, Eda Yetgin, Yusuf Polat, Ali Kilic*, Ali Demir, Safak Yilmaz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Citations (Scopus)

Abstract

Poly(vinylidene fluoride) (PVDF)-based nanofibrous mats were produced via electrically assisted solution blowing (electroblowing). Morphology and filtration properties of the nanofibrous mats were investigated as a function of polymer concentration and applied voltage. The average fiber diameter was reduced from 727 ± 366 nm to 408 ± 143 nm and from 424 ± 233 nm to 328 ± 105 nm, using 16 wt% and 12 wt% concentrations, respectively, with an increase of electric voltage from 0 to 30 kV. In addition, the pore size of the mats produced from 12 wt% concentration decreases with the increase of electric voltage. Results showed that electroblown mats possess high filtration properties and performance. Enhancement of mechanical capturing efficiency is attributed to the reduction in fiber diameter and pore size. The enhancement of electrostatic capturing efficiency is thought to be from the improved electret property of the mats, which eliminates the need for a second step to polarize nanofibrous mats. As a result, both mechanical and electrostatic capture efficiency of the mats is enhanced compared to solution blown PVDF mats. The emerging electret property might be due to the accumulation of the electrostatic charges at high voltage and the enhanced polarized β phase, which is the result of the high drawing ratio applied to the polymer jet during the spinning process.

Original languageEnglish
Pages (from-to)1186-1193
Number of pages8
JournalPolymer Engineering and Science
Volume60
Issue number6
DOIs
Publication statusPublished - 1 Jun 2020

Bibliographical note

Publisher Copyright:
© 2020 Society of Plastics Engineers

Funding

This work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) (grant number 118M035) and Istanbul Development Agency (ISTKA) (grant number TR10/18/YMP/0075).

FundersFunder number
ISTKATR10/18/YMP/0075
TUBITAK118M035
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu
Istanbul Kalkinma Ajansi

    Keywords

    • electret filter
    • electroblowing
    • nanofibrous membrane

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