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    Preparation and modification of an embossed nanofibrous materials for robust filtration performance of PM0.2 removal

    Year: 2021

    Journal: J. Ind. Eng. Chem., Volume 93, JAN 25, page 339–350

    Authors: Koh, Eunjoo; Park, Hee Min; Lee, Yong Taek

    Organizations: Korea Institute for Advancement of Technology (KIAT), South Korea - Ministry of Trade, Industry, Energy (MOTIE) [N0001882]

    Keywords: 3D support pattern; Embossed nanofibrous materials; Surface area; Ionic modification; PM0.2 filtration

    This work develops an embossed nanofiber membranes (ENMs) using 3D patterns for use in air mask filtration and compares this structure with a planar nanofibrous materials (PNMs). The embossed nanofiber membrane (ENM) was prepared using a combination of 3D printing and electrospinning technologies to increase the surface area of the ENM compared to that of planar structures. The surface area of the ENM was three times higher (66 m3 g(-1)) than that of the PNM (23 m(3) g(-1)). The embossing structure depended on hole size and height of the grid in the 3D pattern. The pore size of the nanofiber membranes (NMs) was controlled to 0.2 mm to enable robust filtration of ultrafine airborne particle and smog pollutants. The polyamide 6 ENM achieved excellent filtration efficiency via corona surface ionic modification with (--CH2CHCONH2+) or anion (--NHCH2COO-). Ion-modification generated an electrostatic attraction or van der Waals force/repulsive force between pollutant particles and the NM surface. The dynamic particle barrier efficiency of ionic ENMs was evaluated by dynamic particle removal efficiency (%), penetration (%), resistance (mmH(2)O), and air permeability (m(3)/m(2)/min) tests. Well-developed pore structures and large surface area of the NM were enhanced by the embossed structure compared to that of PNM. (C) 2020 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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