Authors:

Ishan Gopu Nair

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About Paper:

Dehumidification technologies are used to reduce humidity in many different contexts, ranging from residential applications to industrial applications. However, conventional condensation dehumidification technologies are energy intensive as they need to go through a phase change procedure to remove moisture. Membrane-based dehumidification is considered a top alternative. In passive membrane dehumidification (PMD), dehumidification occurs solely through the water vapor pressure partial pressure differences between two flow streams and eliminates the need for energy-intensive rotary components like compressors or vacuum pumps. This provides significant savings in energy use and cost. However, for an efficient operation, a membrane with high water vapor permeance and low thermal conductivity is desired for PMD. As reduced graphene oxide (rGO) granule foam is known for its lower thermal conductivity, a support layer of polyvinylidene fluoride (PVDF) and rGO was fabricated using the casting and phase inversion method. For high vapor permeation and selective gas permeation, graphene oxide (GO) with PEBAX-1657 was used to fabricate the active layer of the membrane. The use of hydrophilic nanoparticles improves dehumidification performance when compared with a control membrane without rGO filler. These results yield positive prospects for further application of nanoparticle-enhanced membranes for passive membrane dehumidification. Keywords: [no keywords provided]

Source:

Purdue University / 2025

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Co-authors:

Ishan Gopu Nair