Enhanced Aerosol Particle Filtration Efficiency of Nonwoven Porous Cellulose Triacetate Nanofiber Mats
| Autor: | Hiroyuki Murata, Takashi Ogi, Ratna Balgis, Li Bao, Makoto Kobayashi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering technology industry and agriculture 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Article 0104 chemical sciences Aerosol law.invention lcsh:Chemistry Cellulose triacetate chemistry.chemical_compound chemistry Chemical engineering lcsh:QD1-999 law Nanofiber Nano Particle 0210 nano-technology Porosity Filtration |
| Zdroj: | ACS Omega ACS Omega, Vol 3, Iss 7, Pp 8271-8277 (2018) |
| ISSN: | 2470-1343 |
| Popis: | Aerosol particle filtration in most penetrating particle size (MPPS) region is of great challenge for conventional nonwoven filter mats. The present work, therefore, redesigns conventional filter mats by introducing porous structure. A combination of thermally induced phase separation and breath figure mechanism was employed to synthesize porous cellulose triacetate fibers, in conjunction with the volatile solvent methylene chloride. The ambient humidity, the concentration of the polyvinylpyrrolidone (PVP) secondary polymer, and the ethanol cosolvent were all adjusted to modify the Taylor cone formation, jet stability,and fiber porosity. After fiber formation, the PVP was removed to obtain a superhydrophobic material. To distinguish the effect of pores, the performance of porous and nonporous nanofibers having similar sizes was conducted. Tests were performed using various dust particle sizes, and the results show that the collection efficiency of the porous fibers, resulting from particle diffusion, inertial impaction, and interception, was improved. Interestingly, the efficiency of the porous fibers in the MPPS region was exceptionally enhanced (up to 95%), demonstrating that the presence of dynamic pores greatly contributes to particle capture. This research was supported by JSPS KAKENHI Grant-in-Aid numbers 26709061 and 16K13642 and by the Center for Functional Nano Oxides at Hiroshima University. |
| Databáze: | OpenAIRE |
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