Polymerized Ionic Liquids with Polythiophene Backbones: Self-Assembly, Thermal Properties, and Ion Conduction

Here we introduce the synthesis and thermal properties of a series of sophisticated imidazolium ionenes with alternating amide-amide or amide-imide backbone functionality, and investigate the structural effects of mono(imidazolium) and unprecedented tris(imidazolium) ionic liquids (ILs) in these ionenes. The new set of poly(amide-amide) (PAA) and poly(amide-imide) (PAI) ionenes represent the intersection of conventional high-performance polymers with the ionene archetype–presenting polymers with alternating functional and ionic elements precisely sequenced along the backbone. The effects of polymer composition on the thermal properties and morphology were analyzed. Five distinct polymer backbones were synthesized and combined with a stoichiometric equivalent of the IL 1-benzyl-3-methylimidazolium bistriflimide ([Bnmim][Tf2N]), which were studied to probe the self-assembly, structuring, and contributions of intermolecular forces when IL is added. Furthermore, three polyamide (PA) or polyimide (PI) ionenes with simpler xylyl linkages were interfaced with [Bnmim][Tf2N] as well as a novel amide-linked tris(imidazolium) IL, to demonstrate the structural changes imparted by the inclusion of functional, ionic additives dispersed within the ionene matrix. This work highlights the possibilities for utilizing concepts from small molecules which exhibit supramolecular self-assembly to guide creative design and manipulate the structuring of ionenes.

Download Full-text

Influence of ionic liquids on mechanical and thermal properties of polyethylene from renewable resources

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-020-10489-1 ◽

2021 ◽

Author(s):

Ewa Rudnik ◽

Magdalena Węgrzyn ◽

Bożena Kukfisz ◽

Renata Kamocka-Bronisz

Keyword(s):

Ionic Liquids ◽

Thermal Properties ◽

Renewable Resources ◽

Mechanical And Thermal Properties

Download Full-text

Aggregation Behaviours of Surface-Active Ionic Liquids 1-Alkyl-3-methylimidazolium Bis(2-ethylhexyl)sulfosuccinate

Australian Journal of Chemistry ◽

10.1071/ch16122 ◽

2016 ◽

Vol 69 (11) ◽

pp. 1254 ◽

Cited By ~ 5

Author(s):

Jiequn Wu ◽

Tianxiang Yin ◽

Shaoxiong Shi ◽

Weiguo Shen

Keyword(s):

Ionic Liquids ◽

Self Assembly ◽

Alkyl Chain ◽

Systematic Investigation ◽

Bulk Solution ◽

Free Energies ◽

Imidazolium Cation ◽

Structure Transition ◽

Surface Active ◽

Counter Ion Binding

The systematic investigation of the aggregation behaviours of newly synthesised surface-active ionic liquids 1-alkyl-3-methylimidazolium bis(2-ethylhexyl)sulfosuccinate ([Cnmim][AOT], n = 2, 3, 5, 6, 7) by various techniques is reported. The critical aggregation concentrations (CACs) and the standard Gibbs free energies of aggregation () were determined from measurements on conductivity, fluorescence, and surface tension, which suggested a stronger self-assembly ability in the bulk solution for [Cnmim][AOT] surfactants with longer alkyl chain cations. An interesting structure transition driven by the penetration of the imidazolium cation into the aggregate when n > 4 was found by analysis of the variations of the values of CAC, , the degree of counter ion binding (β), and the micropolarity (I1/I3) immediately after the CAC with changing alkyl chain length of the imidazolium cation, which was further confirmed by 1H NMR measurements.

Download Full-text