Synthesis and enhanced swelling properties of a guar gum-based superabsorbent composite by the simultaneous introduction of styrene and attapulgite |
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Authors: | Xiaoning Shi Wenbo Wang Aiqin Wang |
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Affiliation: | (1) Center of Eco-material and Green Chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People’s Republic of China;(2) Graduate University of the Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China; |
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Abstract: | In current study, a series of novel guar gum-graft-poly(sodium acrylate-co-styrene)/attapulgite (GG-g-P(NaA-co-St)/APT) superabsorbent nanocomposites were prepared by the simultaneous graft copolymerization of partially neutralized
acrylic acid (NaA), styrene (St) and attapulgite (APT) onto natural guar gum (GG), using ammonium persulfate (APS) as the
initiator and N,N'-methylene-bis-acrylamide (MBA) as the crosslinking agent. Fourier Transform Infrared (FTIR) and ultravoilet (UV) spectra confirmed that
NaA and St had been grafted onto GG backbones and APT participated in the polymerization reaction. The incorporation of St
and APT clearly improved the surface porous morphology of the composites as exhibited by Filed Emission Scanning Electron
Microscopy (FESEM). The effect of St and APT on the swelling properties and the swelling kinetics of the developed nanocomposite
was investigated. Results showed that the simultaneous incorporation of proper amount of hydrophobic co-monomer St and inorganic
nano-scale APT not only obviously enhanced the swelling capacity but highly improved the swelling rate, and the nanocomposite
showed better salt-resistant capability and excellent pH-stability in various pH solutions. |
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