title: Sulfonated Polymerized Ionic Liquid Block Copolymers.
abstract: The successful synthesis of a new diblock copolymer, referred to as sulfonated polymerized ionic liquid (PIL) block copolymer, poly(SS-Li-b-AEBIm-TFSI), is reported, which contains both sulfonated blocks (sulfonated styrene: SS) and PIL blocks (1-[(2-acryloyloxy)ethyl]-3-butylimidazolium: AEBIm) with both mobile cations (lithium: Li(+) ) and mobile anions (bis(trifluoromethylsulfonyl)imide: TFSI(-) ). Synthesis consists of polymerization via reversible addition-fragmentation chain transfer, followed by post-functionalization reactions to covalently attach the imidazolium cations and sulfonic acid anions to their respective blocks, followed by ion exchange metathesis resulting in mobile Li(+) cations and mobile TFSI(-) anions. Solid-state films containing 1 m Li-TFSI salt dissolved in ionic liquid result in an ion conductivity of >1.5 mS cm(-1) at 70 °C, where small-angle X-ray scattering data indicate a weakly ordered microphase-separated morphology. These results demonstrate a new ion-conducting block copolymer containing both mobile cations and mobile anions.
authors.affiliation: Department of Chemical Engineering, Texas A & M University, College Station, TX, 77843, USA.
authors.forename: Kelly M
authors.initials: KM
authors.lastname: Meek
authors.affiliation: Department of Chemical Engineering, Texas A & M University, College Station, TX, 77843, USA.
authors.forename: Yossef A
authors.initials: YA
authors.lastname: Elabd
mesh_terms: D052578:Ionic Liquids / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D013451:Sulfonic Acids / Q000737:chemistry*
chemical_list: D052578:Ionic Liquids; D011108:Polymers; D013451:Sulfonic Acids
keywords: block copolymers; ionic liquids; membranes; polymer electrolytes; sulfonation