title: Intercalation and structural aspects of macroRAFT agents into MgAl layered double hydroxides.
abstract: Increasing attention has been devoted to the design of layered double hydroxide (LDH)-based hybrid materials. In this work, we demonstrate the intercalation by anion exchange process of poly(acrylic acid) (PAA) and three different hydrophilic random copolymers of acrylic acid (AA) andn-butyl acrylate (BA) with molar masses ranging from 2000 to 4200 g mol-1synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization, into LDH containing magnesium(II) and aluminium(III) intralayer cations and nitrates as counterions (MgAl-NO3LDH). At basic pH, the copolymer chains (macroRAFT agents) carry negative charges which allowed the establishment of electrostatic interactions with the LDH interlayer and their intercalation. The resulting hybrid macroRAFT/LDH materials displayed an expanded interlamellar domain compared to pristine MgAl-NO3LDH from 1.36 nm to 2.33 nm. Depending on the nature of the units involved into the macroRAFT copolymer (only AA or AA and BA), the intercalation led to monolayer or bilayer arrangements within the interlayer space. The macroRAFT intercalation and the molecular structure of the hybrid phases were further characterized by Fourier transform infrared (FTIR) and solid-state13C,1H and27Al nuclear magnetic resonance (NMR) spectroscopies to get a better description of the local structure.
authors.affiliation: Université Clermont Auvergne, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, F-63171 Aubière, France.
authors.forename: Dessislava
authors.initials: D
authors.lastname: Kostadinova
authors.affiliation: Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS 5265, Chemistry, Catalysis, Polymers and Processes (C2P2), 43 Bvd du 11 Novembre 1918, 69616 Villeurbanne, France.
authors.forename: Ana
authors.initials: A
authors.lastname: Cenacchi Pereira
authors.affiliation: Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS 5265, Chemistry, Catalysis, Polymers and Processes (C2P2), 43 Bvd du 11 Novembre 1918, 69616 Villeurbanne, France.
authors.forename: Muriel
authors.initials: M
authors.lastname: Lansalot
authors.affiliation: Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS 5265, Chemistry, Catalysis, Polymers and Processes (C2P2), 43 Bvd du 11 Novembre 1918, 69616 Villeurbanne, France.
authors.forename: Franck
authors.initials: F
authors.lastname: D'Agosto
authors.affiliation: Univ Lyon, Université Claude Bernard Lyon 1, CPE Lyon, CNRS 5265, Chemistry, Catalysis, Polymers and Processes (C2P2), 43 Bvd du 11 Novembre 1918, 69616 Villeurbanne, France.
authors.forename: Elodie
authors.initials: E
authors.lastname: Bourgeat-Lami
authors.affiliation: Université Clermont Auvergne, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, F-63171 Aubière, France.
authors.forename: Fabrice
authors.initials: F
authors.lastname: Leroux
authors.affiliation: Université Clermont Auvergne, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, F-63171 Aubière, France.
authors.forename: Christine
authors.initials: C
authors.lastname: Taviot-Guého
authors.affiliation: Institut des Matériaux Jean Rouxel (IMN) - UMR6502, 2 rue de la Houssinière, BP32229 44322 Nantes cedex 3, France.
authors.forename: Sylvian
authors.initials: S
authors.lastname: Cadars
authors.affiliation: Université Clermont Auvergne, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, F-63171 Aubière, France.
authors.forename: Vanessa
authors.initials: V
authors.lastname: Prevot
keywords: RAFT; hybrid materials; hydrophilic copolymers; intercalation; layered double hydroxides; solid-state NMR