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Moisture Adsorption–Desorption Behaviour in Nanocomposite Copolymer Films

Dehumidifying air via refrigerant cooling method consumes a tremendous amount of energy. Independent humidity control systems using desiccants have been introduced to improve energy efficiency. This research aimed to find an alternative to the commonly used solid desiccant, silica gel, which has wea...

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Autores principales: Md Zulkiflie, Farah Aqilah, Muhamad Sarih, Norazilawati, Hashim, Nur Awanis, Mohd Zubir, Mohd Nashrul, Abdullah, Shekh, Mohd Amin, Aida Sabrina
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10384989/
https://www.ncbi.nlm.nih.gov/pubmed/37514388
http://dx.doi.org/10.3390/polym15142998
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author Md Zulkiflie, Farah Aqilah
Muhamad Sarih, Norazilawati
Hashim, Nur Awanis
Mohd Zubir, Mohd Nashrul
Abdullah, Shekh
Mohd Amin, Aida Sabrina
author_facet Md Zulkiflie, Farah Aqilah
Muhamad Sarih, Norazilawati
Hashim, Nur Awanis
Mohd Zubir, Mohd Nashrul
Abdullah, Shekh
Mohd Amin, Aida Sabrina
author_sort Md Zulkiflie, Farah Aqilah
collection PubMed
description Dehumidifying air via refrigerant cooling method consumes a tremendous amount of energy. Independent humidity control systems using desiccants have been introduced to improve energy efficiency. This research aimed to find an alternative to the commonly used solid desiccant, silica gel, which has weak physical adsorption properties. It also aimed to overcome the limitation of liquid desiccants that may affect indoor air quality and cause corrosion. This study reports on the synthesis of poly(vinyl alcohol-co-acrylic acid), P(VA-AA), through solution polymerisation by hydrolysing poly(vinyl acetate-co-acrylic acid), P(VAc-AA). This viable copolymer was then incorporated with graphene oxide (GO) at different concentrations (0 wt.%, 0.5 wt.%, 2 wt.% and 5 wt.%) to enhance the adsorption–desorption process. The samples were tested for their ability to adsorb moisture at different levels of relative humidity (RH) and their capability to maintain optimum sorption capacity over 10 repeated cycles. The nanocomposite film with 2% GO, P(VA-AA)/GO2, exhibited the highest moisture sorption capacity of 0.2449 g/g for 60–90% RH at 298.15 K, compared to its pristine copolymer, which could only adsorb 0.0150 g/g moisture. The nanocomposite desiccant demonstrated stable cycling stability and superior desorption in the temperature range of 318.15–338.15 K, with up to 88% moisture desorption.
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spelling pubmed-103849892023-07-30 Moisture Adsorption–Desorption Behaviour in Nanocomposite Copolymer Films Md Zulkiflie, Farah Aqilah Muhamad Sarih, Norazilawati Hashim, Nur Awanis Mohd Zubir, Mohd Nashrul Abdullah, Shekh Mohd Amin, Aida Sabrina Polymers (Basel) Article Dehumidifying air via refrigerant cooling method consumes a tremendous amount of energy. Independent humidity control systems using desiccants have been introduced to improve energy efficiency. This research aimed to find an alternative to the commonly used solid desiccant, silica gel, which has weak physical adsorption properties. It also aimed to overcome the limitation of liquid desiccants that may affect indoor air quality and cause corrosion. This study reports on the synthesis of poly(vinyl alcohol-co-acrylic acid), P(VA-AA), through solution polymerisation by hydrolysing poly(vinyl acetate-co-acrylic acid), P(VAc-AA). This viable copolymer was then incorporated with graphene oxide (GO) at different concentrations (0 wt.%, 0.5 wt.%, 2 wt.% and 5 wt.%) to enhance the adsorption–desorption process. The samples were tested for their ability to adsorb moisture at different levels of relative humidity (RH) and their capability to maintain optimum sorption capacity over 10 repeated cycles. The nanocomposite film with 2% GO, P(VA-AA)/GO2, exhibited the highest moisture sorption capacity of 0.2449 g/g for 60–90% RH at 298.15 K, compared to its pristine copolymer, which could only adsorb 0.0150 g/g moisture. The nanocomposite desiccant demonstrated stable cycling stability and superior desorption in the temperature range of 318.15–338.15 K, with up to 88% moisture desorption. MDPI 2023-07-10 /pmc/articles/PMC10384989/ /pubmed/37514388 http://dx.doi.org/10.3390/polym15142998 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Md Zulkiflie, Farah Aqilah
Muhamad Sarih, Norazilawati
Hashim, Nur Awanis
Mohd Zubir, Mohd Nashrul
Abdullah, Shekh
Mohd Amin, Aida Sabrina
Moisture Adsorption–Desorption Behaviour in Nanocomposite Copolymer Films
title Moisture Adsorption–Desorption Behaviour in Nanocomposite Copolymer Films
title_full Moisture Adsorption–Desorption Behaviour in Nanocomposite Copolymer Films
title_fullStr Moisture Adsorption–Desorption Behaviour in Nanocomposite Copolymer Films
title_full_unstemmed Moisture Adsorption–Desorption Behaviour in Nanocomposite Copolymer Films
title_short Moisture Adsorption–Desorption Behaviour in Nanocomposite Copolymer Films
title_sort moisture adsorption–desorption behaviour in nanocomposite copolymer films
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10384989/
https://www.ncbi.nlm.nih.gov/pubmed/37514388
http://dx.doi.org/10.3390/polym15142998
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