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Super water absorbing polymeric gel from chitosan, citric acid and urea: Synthesis and mechanism of water absorption
Abathodharanan Narayanan,
Published in Elsevier Ltd
2018
PMID: 29661303
Volume: 191
   
Pages: 152 - 160
Abstract
A new superabsorbent with maximum water absorption capacity of ∼1250 g/g is prepared by hydrothermal synthesis from sustainable and biodegradable resources such as chitosan, citric acid and urea (denoted as ‘CHCAUR’). CHCAUR is characterized extensively by various analytical techniques such as PXRD, SSNMR, FTIR, and TGA. Pure and saline water absorption study showed that CHCAUR could be a better adsorbent compared to the super absorbent polymer (SAP) used in commercial diaper material. The mechanism of water absorption is shown to arise out of a combination of electrostatic attraction of water to the ionic crosslinks and the presence of macropores as well as undulated surface due to the formation of nanofibrous bundles. When applied to soil CHCAUR was found to decrease water evaporation rate significantly. © 2018
About the journal
JournalData powered by TypesetCarbohydrate Polymers
PublisherData powered by TypesetElsevier Ltd
ISSN01448617
Open AccessNo
Concepts (20)
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    Chitin
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    Chitosan
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    Citric acid
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    Crosslinking
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    Driers (materials)
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    Hydrothermal synthesis
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    Metabolism
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    Nitrogen compounds
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    Polymers
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    SALINE WATER
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    Urea
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    Electrostatic attractions
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    IONIC CROSS-LINKS
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    Macroporous polymers
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    SUPER ABSORBENT
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    SUPERABSORBENT POLYMER
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    WATER ABSORPTION CAPACITY
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    WATER EVAPORATION
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    Water retention
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    Water absorption