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<p>A novel nanofibrous nanocomposite coating comprised of matrix thermoplastic polyurethane (TPU) and nanofillers graphene oxide (GO) and cellulose nanocrystal (CNC) was designed and synthesized utilizing an electrospinning methodology. The nanofibers were coated onto a non-woven substrate in two different ambient conditions, high and low relative humidity, to determine changes in air filtration efficiency against sodium chloride (NaCl) particulates. The nanocomposites were also investigated to determine the effects of the nanofillers on the filtration properties of the coatings. Through experimental measurements in comparison to single fiber efficiency (SFE) analytical predictions, the coatings were found to indicate the following: (1) electrospinning depositions done at low humidity resulted in smaller fiber sizes and superior filtration efficiency for all compositions: (2) GO reduced the average fiber diameter without altering the filtration efficiency when deposited at low humidity; (3) for low humidity deposits CNC improved the filtration efficiency while not affecting the obtained fiber size; and (4) the combination of GO and CNC reduced the filtration efficiency without altering the fiber size or differential pressure.</p>

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Modeling and analysis of air filtration performance of a novel nanofiber electrospun nanocomposite filter of thermoplastic polyurethane, graphene oxide, and cellulose nanocrystal

  • 期刊论文

  • 发表日期：

    2025年3月11日

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  • Kelton C. Ireland,
  • Gobinda C. Saha,
  • Muhammad T. Afzal

摘要

A novel nanofibrous nanocomposite coating comprised of matrix thermoplastic polyurethane (TPU) and nanofillers graphene oxide (GO) and cellulose nanocrystal (CNC) was designed and synthesized utilizing an electrospinning methodology. The nanofibers were coated onto a non-woven substrate in two different ambient conditions, high and low relative humidity, to determine changes in air filtration efficiency against sodium chloride (NaCl) particulates. The nanocomposites were also investigated to determine the effects of the nanofillers on the filtration properties of the coatings. Through experimental measurements in comparison to single fiber efficiency (SFE) analytical predictions, the coatings were found to indicate the following: (1) electrospinning depositions done at low humidity resulted in smaller fiber sizes and superior filtration efficiency for all compositions: (2) GO reduced the average fiber diameter without altering the filtration efficiency when deposited at low humidity; (3) for low humidity deposits CNC improved the filtration efficiency while not affecting the obtained fiber size; and (4) the combination of GO and CNC reduced the filtration efficiency without altering the fiber size or differential pressure.