Journal
JOURNAL OF MOLECULAR LIQUIDS
Volume 280, Issue -, Pages 128-134Publisher
ELSEVIER
DOI: 10.1016/j.molliq.2019.02.033
Keywords
Layered double hydroxide (LDH); Nanocomposite (NC) hydrogel; Preparation; Rheology; Adsorption
Funding
- National Natural Science Foundation of China [21502227, 21406269, 21572269]
- State Key Laboratory of Heavy Oil Processing [SLKZZ-2017009]
- Fundamental Research Funds for the Central Universities [15CX02015A, 16CX05009A]
- Shandong Provincial Key Research Program [2016GSF115032]
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Layered double hydroxide (LDH)/polyacrylamide (PAM) nanocomposite (NC) hydrogels were successfully prepared utilizing Co/Al-LDH nanosheet as inorganic crosslinker, acrylamide as monomer via in-situ free radical polymerization at room temperature in water. The Co/Al-LDH used here is freshly prepared Co/Al-LDH solution with a Tyndall phenomenon, which avoids the exfoliation and dispersion process of LDH using toxic organic solvent or modifiers. The hydrogel formation mechanism can be ascribed to the coordination and hydrogen bonding interactions between hydroxyl groups on LDH nanosheet and amide groups on acrylamide. The effect of LDH content on viscoelastic properties were studied by rheology measurement. The removal of methyl orange as a probe dye by Co/Al-LDH/PAM NC hydrogel accords with Langmuir adsorption isotherm and pseudo-second-order equation. (C) 2019 Elsevier B.V. All rights reserved.
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