Journal
CARBOHYDRATE POLYMERS
Volume 111, Issue -, Pages 463-468Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2014.04.031
Keywords
Xanthan gum; Loess; Composite superabsorbent; Water absorbency; Swelling-deswelling
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Funding
- National Science Foundation of China [21164009]
- Ministry of Education Chang jiang Scholars and Innovative Research Team [IRT1177]
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A new, low-cost, and eco-friendly organic inorganic composite superabsorbent was successfully synthesized in aqueous solution by polymerization xanthan gum (XG), neutralized acrylic acid (AA) and loess using ammonium persulfate (APS) as initiator and N,N-methylenebisacrylamide (MBA) as crosslinker. Structure and morphological characterizations of the composite superabsorbent were investigated by Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The loess content, pH values, surfactants, salts and temperature which could affect the swelling and water-retention capabilities of the composite superabsorbent were investigated. The composite superabsorbent exhibits excellent water absorbency (610 g/g in distilled water), pH-stability (pH 5-10), and higher swelling capacity in anionic surfactant solution; on the other hand, the composite superabsorbent can be used for removing multivalent metal ions. (C) 2014 Elsevier Ltd. All rights reserved.
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