TY - JOUR
T1 - Fabrication, characterization, and evaluation of desiccant doped hydrogel films for potential air-dehumidification applications
AU - Bhowmik, Mrinal
AU - Dharmalingam, Koodalingam
AU - Halder, Sayan
AU - Muthukumar, Palanisamy
AU - Anandalakshmi, Ramalingam
N1 - Funding Information:
The authors are very much grateful to the Engineering Section, Indian Institute of Technology Guwahati, for their financial support (Project No.: IITG/ENGG/AEE/EL81) to procure the desiccant materials. The authors would also like to thank CoE-SusPol, IIT Guwahati for their support to carry out the WVP experiments.
Funding Information:
The authors are very much grateful to the Engineering Section, Indian Institute of Technology Guwahati, for their financial support (Project No.: IITG/ENGG/AEE/EL81) to procure the desiccant materials. The authors would also like to thank CoE‐SusPol, IIT Guwahati for their support to carry out the WVP experiments.
Publisher Copyright:
© 2021 Wiley Periodicals LLC.
PY - 2022/2/10
Y1 - 2022/2/10
N2 - Temperature-independent humidity control through desiccant material provides a substantial impact on minimizing energy shortages and reduces environmental problems without compromising human thermal comfort. In the present study, desiccant (lithium bromide: calcium chloride) doped sodium carboxymethyl cellulose (NaCMC) films using citric acid as a crosslinker were developed to explore the air dehumidification and regeneration capability of films. Films were prepared at various desiccant concentrations (5%, 10%, and 20%), and were characterized using X-ray powder diffraction (XRD), thermo-gravimetric (TG), moisture absorption, and water vapor permeability (WVP) analysis. XRD analysis revealed that there were no characteristic peaks of desiccants in the film samples, which indicated that the mixing of desiccants was homogeneous in the films. Moisture absorption and TG analysis revealed that films contained 10% desiccants showed an effective instantaneous moisture-holding capacity and faster regeneration rate, respectively, compared to 5% and 20% desiccant doped hydrogel films. It was found from WVP test that increasing amount of desiccants decreased the WVP due to reduction in intermolecular space in the prepared films. Further, a comprehensive comparison was made to visualize the effectiveness of developed desiccant films. All these data recommend that the prepared desiccant doped films can be used for potential air dehumidification applications.
AB - Temperature-independent humidity control through desiccant material provides a substantial impact on minimizing energy shortages and reduces environmental problems without compromising human thermal comfort. In the present study, desiccant (lithium bromide: calcium chloride) doped sodium carboxymethyl cellulose (NaCMC) films using citric acid as a crosslinker were developed to explore the air dehumidification and regeneration capability of films. Films were prepared at various desiccant concentrations (5%, 10%, and 20%), and were characterized using X-ray powder diffraction (XRD), thermo-gravimetric (TG), moisture absorption, and water vapor permeability (WVP) analysis. XRD analysis revealed that there were no characteristic peaks of desiccants in the film samples, which indicated that the mixing of desiccants was homogeneous in the films. Moisture absorption and TG analysis revealed that films contained 10% desiccants showed an effective instantaneous moisture-holding capacity and faster regeneration rate, respectively, compared to 5% and 20% desiccant doped hydrogel films. It was found from WVP test that increasing amount of desiccants decreased the WVP due to reduction in intermolecular space in the prepared films. Further, a comprehensive comparison was made to visualize the effectiveness of developed desiccant films. All these data recommend that the prepared desiccant doped films can be used for potential air dehumidification applications.
KW - air dehumidification
KW - hydrogel films
KW - liquid desiccant (LiBr+CaCl)
KW - moisture absorption rate
KW - sodium carboxymethyl cellulose (NaCMC)
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U2 - 10.1002/app.51607
DO - 10.1002/app.51607
M3 - Article
AN - SCOPUS:85114287212
SN - 0021-8995
VL - 139
JO - Journal of Applied Polymer Science
JF - Journal of Applied Polymer Science
IS - 6
M1 - 51607
ER -