Author, as appears in the article.: Zare A; Pascual-Jose B; De la Flor S; Ribes-Greus A; Montané X; Reina JA; Giamberini M
Department: Enginyeria Mecànica Enginyeria Química Química Analítica i Química Orgànica
URV's Author/s: De la Flor Lopez, Silvia / Giamberini, Marta / Montané Montané, Xavier / Reina Lozano, José Antonio / Zare, Alireza
Keywords: Wettability Transport properties Self-assembly Scanning electron microscopy Positive ions Polyepichlorohydrin Poly(epichlorohydrin-co-ethylene oxide) Methanol permeability Methanol Membranes Membrane transport Membrane orientation Membrane characterization Liquid-crystalline polymers Linear sweep voltammetry Field emission microscopes Ethylene oxides Ethylene Dynamic mechanical thermal analysis Dielectric thermal analysis Dendrons Crystalline polymeric wires Contact angle Cation-transport membranes Cation-exchange membrane Cation transports Cation exchange membranes wires wettability water tapered mesogenic groups self-assembly selective proton transport relaxation orientation methanol permeability membrane orientation linear sweep voltammetry ion-conducting membranes fuel-cells family ethylene-oxide dynamic mechanical thermal analysis dielectric thermal analysis design derivatives dendrons cation-transport membranes cation-exchange membrane
Abstract: Dendronized polyethers give rise to columnar LC structures which can successfully act as cation transport materials. Therefore, we prepared two different materials, based on Poly(epichlorohydrin-co-ethylene oxide) (PECH-co-EO) grafted with methyl 3,4,5-tris[4-(n-dodecan-1-yloxy)benzyloxy] benzoate, containing 20% or 40% modified units, respectively. The obtained polymers were characterized by differential scanning calorimetry (DSC), X-ray diffraction and optical microscopy between crossed polars (POM) and compared to the unmodified PECH-co-EO. In order to reach efficient transport properties, homeotropically oriented membranes were prepared by a fine-tuned thermal annealing treatment and were subsequently investigated by dynamic mechanical thermal analysis (DMTA) and dielectric thermal analysis (DETA). We found that the presence of the dendrons induces a main chain partial crystallization of the polyether chain and coherently increases the polymer Tg. This effect is more evident in the oriented membranes. As for copolymer orientation upon annealing, the cooling rate and the annealing temperature were the most crucial factors. DMTA and DETA confirmed that grafting with the dendron strongly hinders copolymer motions, but did not show great differences between unoriented and oriented membranes, regardless of the amount of dendrons.
Thematic Areas: Polymers and plastics Polymer science Odontología General chemistry Farmacia Engenharias ii Ciências biológicas ii Chemistry (miscellaneous) Chemistry (all) Biotecnología Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: xavier.montane@urv.cat alireza.zare@urv.cat marta.giamberini@urv.cat joseantonio.reina@urv.cat silvia.delaflor@urv.cat
Author identifier: 0000-0002-1426-239X 0000-0002-6981-8914 0000-0001-8278-3552 0000-0002-9245-4135 0000-0002-6851-1371
Record's date: 2024-07-27
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://www.mdpi.com/2073-4360/13/20/3532
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Polymers. 13 (20): 3532-
APA: Zare A; Pascual-Jose B; De la Flor S; Ribes-Greus A; Montané X; Reina JA; Giamberini M (2021). Membranes for cation transport based on dendronized poly(Epichlorohydrin-co-ethylene oxide). part 1: The effect of dendron amount and column orientation on copolymer mobility. Polymers, 13(20), 3532-. DOI: 10.3390/polym13203532
Article's DOI: 10.3390/polym13203532
Entity: Universitat Rovira i Virgili
Journal publication year: 2021
Publication Type: Journal Publications
Repositori URV