Theoretical analysis of centrifugal dewatering of superabsorbent hydrogels using Terzaghi–Voigt combined model

This paper presents results of experimental work carried out to study the centrifugal dewatering behaviors of superabsorbent hydrogels. Taking the creep deformation of the hydrogels into consideration and assuming that the mechanical properties of gel network can be represented by Terzaghi–Voigt c...

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Main Authors:	Jami, Mohammed Saedi, Iwata, Masashi
Format:	Article
Language:	English
Published:	Elsevier 2007
Subjects:	TP155 Chemical engineering
Online Access:	http://irep.iium.edu.my/40896/ http://irep.iium.edu.my/40896/ http://irep.iium.edu.my/40896/ http://irep.iium.edu.my/40896/1/CDS_ge_publishedl.pdf

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spelling	iium-408962015-03-05T07:57:17Z http://irep.iium.edu.my/40896/ Theoretical analysis of centrifugal dewatering of superabsorbent hydrogels using Terzaghi–Voigt combined model Jami, Mohammed Saedi Iwata, Masashi TP155 Chemical engineering This paper presents results of experimental work carried out to study the centrifugal dewatering behaviors of superabsorbent hydrogels. Taking the creep deformation of the hydrogels into consideration and assuming that the mechanical properties of gel network can be represented by Terzaghi–Voigt combined model, the basic differential equation expressing the centrifugal dewatering of superabsorbent hydrogels is solved. The progress of centrifugal dewatering is represented by an average consolidation ratio Uc as in mechanical expression. The agreement between calculated and experimental Uc is satisfactory when the creep deformation of the material is considered. Consistent with mechanical expression and electroosmotic dewatering, as the driving force for centrifugal dewatering increases, the modified consolidation coefficient of the hydrogel network Ce also increases. Effectiveness of centrifugal dewatering, expressed as a relative difference between the initial void ratio and final void ratio, increases with the rotational speed. For a given rotational speed, the final void ratio remains constant regardless of the initial weight of the gel. On the other hand, as the rotational speed of the centrifuge gets higher, the final void ratio decreases for all initial weights of the gel investigated in the current study. The magnitude of creep deformation B depends upon the amount of initial weight of the hydrogel. For a given rotational speed of the centrifuge, the magnitude of creep deformation becomes larger as the initial amount of hydrogel is increased. � 2007 Elsevier Ltd. All rights reserved. Elsevier 2007-10-06 Article PeerReviewed application/pdf en http://irep.iium.edu.my/40896/1/CDS_ge_publishedl.pdf Jami, Mohammed Saedi and Iwata, Masashi (2007) Theoretical analysis of centrifugal dewatering of superabsorbent hydrogels using Terzaghi–Voigt combined model. European Polymer Journal, 43 (12). pp. 5026-5033. ISSN 0014-3057 http://www.sciencedirect.com/science/article/pii/S0014305707005319 10.1016/j.eurpolymj.2007.10.002
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TP155 Chemical engineering
spellingShingle	TP155 Chemical engineering Jami, Mohammed Saedi Iwata, Masashi Theoretical analysis of centrifugal dewatering of superabsorbent hydrogels using Terzaghi–Voigt combined model
description	This paper presents results of experimental work carried out to study the centrifugal dewatering behaviors of superabsorbent hydrogels. Taking the creep deformation of the hydrogels into consideration and assuming that the mechanical properties of gel network can be represented by Terzaghi–Voigt combined model, the basic differential equation expressing the centrifugal dewatering of superabsorbent hydrogels is solved. The progress of centrifugal dewatering is represented by an average consolidation ratio Uc as in mechanical expression. The agreement between calculated and experimental Uc is satisfactory when the creep deformation of the material is considered. Consistent with mechanical expression and electroosmotic dewatering, as the driving force for centrifugal dewatering increases, the modified consolidation coefficient of the hydrogel network Ce also increases. Effectiveness of centrifugal dewatering, expressed as a relative difference between the initial void ratio and final void ratio, increases with the rotational speed. For a given rotational speed, the final void ratio remains constant regardless of the initial weight of the gel. On the other hand, as the rotational speed of the centrifuge gets higher, the final void ratio decreases for all initial weights of the gel investigated in the current study. The magnitude of creep deformation B depends upon the amount of initial weight of the hydrogel. For a given rotational speed of the centrifuge, the magnitude of creep deformation becomes larger as the initial amount of hydrogel is increased. � 2007 Elsevier Ltd. All rights reserved.
format	Article
author	Jami, Mohammed Saedi Iwata, Masashi
author_facet	Jami, Mohammed Saedi Iwata, Masashi
author_sort	Jami, Mohammed Saedi
title	Theoretical analysis of centrifugal dewatering of superabsorbent hydrogels using Terzaghi–Voigt combined model
title_short	Theoretical analysis of centrifugal dewatering of superabsorbent hydrogels using Terzaghi–Voigt combined model
title_full	Theoretical analysis of centrifugal dewatering of superabsorbent hydrogels using Terzaghi–Voigt combined model
title_fullStr	Theoretical analysis of centrifugal dewatering of superabsorbent hydrogels using Terzaghi–Voigt combined model
title_full_unstemmed	Theoretical analysis of centrifugal dewatering of superabsorbent hydrogels using Terzaghi–Voigt combined model
title_sort	theoretical analysis of centrifugal dewatering of superabsorbent hydrogels using terzaghi–voigt combined model
publisher	Elsevier
publishDate	2007
url	http://irep.iium.edu.my/40896/ http://irep.iium.edu.my/40896/ http://irep.iium.edu.my/40896/ http://irep.iium.edu.my/40896/1/CDS_ge_publishedl.pdf
first_indexed	2023-09-18T20:58:36Z
last_indexed	2023-09-18T20:58:36Z
_version_	1777410471377240064

Theoretical analysis of centrifugal dewatering of superabsorbent hydrogels using Terzaghi–Voigt combined model

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