Next Article in Journal
Fabrication of Robust Superhydrophobic Surfaces with Dual-Curing Siloxane Resin and Controlled Dispersion of Nanoparticles
Previous Article in Journal
Eco Friendly Approach for Synthesis, Characterization and Biological Activities of Milk Protein Stabilized Silver Nanoparticles
Article

Heterogenized Imidazolium-Based Ionic Liquids in Pebax®Rnew. Thermal, Gas Transport and Antimicrobial Properties

1
Institute on Membrane Technology, ITM-CNR (c/o University of Calabria), Via P. Bucci 17/C, 87036 Rende (CS), Italy
2
Institute of Polymers, Composites and Biomaterials, IPCB-CNR, via P. Gaifami 18, 95126 Catania, Italy
3
Institute for Microelectronics and Microsystems, IMM-CNR (c/o University of Catania), Via Santa Sofia 64, 95123 Catania, Italy
4
Department of Agriculture, Food and Environment (Di3A), University of Catania, Via Santa Sofia 100, 95123 Catania, Italy
5
Research Institute on Terrestrial Ecosystems, IRET-CNR, Via P. Castellino 111, 80131 Napoli, Italy
*
Authors to whom correspondence should be addressed.
Polymers 2020, 12(6), 1419; https://doi.org/10.3390/polym12061419
Received: 13 May 2020 / Revised: 19 June 2020 / Accepted: 23 June 2020 / Published: 25 June 2020
(This article belongs to the Section Polymer Processing and Engineering)
Imidazolium-based ionic liquids (ILs) have interesting antimicrobial activity and their inclusion in a flexible film is ideal to take advantage of their properties in practical applications. Poly(ether-block-amide) (Pebax®Rnew) films were prepared by solution casting, loading two synthetized ILs (1-hexadecyl-3-methylimidazolium dimethyl-5-sulfoisophthalate [Hdmim][DMSIP], IL1 and 1-octyloximethyl-3-methylimidazolium hexafluorophosphate [OOMmim][PF6], IL2) up to 5 wt.%. The ILs were characterized by 1H NMR and MALDI-TOF spectroscopy. The films were investigated for miscibility, morphology, wettability, spectral properties and gas transport. The films display a good thermal stability (>200 °C). Differential scanning calorimetry (DSC) proves phase separation in the blends, that is consistent with FTIR analysis and with the island-like surface morphology observed in the micrographs. Gas permeability tests revealed that the IL-loaded films are dense and poreless, keeping the selectivity of the polymer matrix with a somewhat lessened permeability owing to the impermeable ILs crystals. The film antimicrobial activity, evaluated against Gram-negative and Gram-positive bacterial strains, was correlated to the structure of the incorporated ILs. The smaller IL2 salt did not modify the hydrophobic nature of the neat polymer and was readily released from the films. Instead, IL1, having a longer alkyl chain in the cation, provided a promising antimicrobial activity with a good combination of hydrophilicity, permeability and thermal stability. View Full-Text
Keywords: imidazolium-based ionic liquids; polymeric films; antimicrobial activity; gas transport imidazolium-based ionic liquids; polymeric films; antimicrobial activity; gas transport
Show Figures

Figure 1

MDPI and ACS Style

Clarizia, G.; Bernardo, P.; Carroccio, S.C.; Ussia, M.; Restuccia, C.; Parafati, L.; Calarco, A.; Zampino, D. Heterogenized Imidazolium-Based Ionic Liquids in Pebax®Rnew. Thermal, Gas Transport and Antimicrobial Properties. Polymers 2020, 12, 1419. https://doi.org/10.3390/polym12061419

AMA Style

Clarizia G, Bernardo P, Carroccio SC, Ussia M, Restuccia C, Parafati L, Calarco A, Zampino D. Heterogenized Imidazolium-Based Ionic Liquids in Pebax®Rnew. Thermal, Gas Transport and Antimicrobial Properties. Polymers. 2020; 12(6):1419. https://doi.org/10.3390/polym12061419

Chicago/Turabian Style

Clarizia, Gabriele, Paola Bernardo, Sabrina C. Carroccio, Martina Ussia, Cristina Restuccia, Lucia Parafati, Anna Calarco, and Daniela Zampino. 2020. "Heterogenized Imidazolium-Based Ionic Liquids in Pebax®Rnew. Thermal, Gas Transport and Antimicrobial Properties" Polymers 12, no. 6: 1419. https://doi.org/10.3390/polym12061419

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop