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Ionic-Liquid-Based Materials and Their Multi-functional Applications

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Materials Science".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 3793

Special Issue Editors


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Guest Editor
Centre of Chemistry, University of Minho, 4710-057 Braga, Portugal
Interests: ionic liquids; smart and multifunctional materials; polymer-based materials; materials processing; surface treatments; sensors and actuators
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
Interests: multifunctional materials; smart materials; energy storage; energy harvesting; sensors; actuators
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Considering the rapid technological developments across different areas of the Industry 4.0 and Internet of Things (IoT) paradigms, leading to an increasingly interactive and interconnected world, a new generation of advanced materials is required.

The smart and multifunctional materials field is steadily growing, with increasing impact in a significant number of application areas, such as sensors, actuators, transducers, energy harvesting and storage, among others. Among these materials, high-performance materials based on polymers and polymer-based hybrid materials are the most frequently used due to their processing versatility and tailorable response. Depending on the desired application, the development of hybrid polymer-based materials is often necessary in order to obtain the specific functionalities and characteristics of ionic liquids (ILs); these stand out due to their versatility in terms of functional responses, tuneability, and their ability to be integrated into polymer matrices.

ILs are commonly defined as salts with a melting temperature often below 100 °C, high ionic conductivity, electrochemical and thermal stability, and non-flammability. Their interesting properties permit their use in the development of ionic liquid/polymer composites. This type of material represents a novel platform for obtaining multifunctional hybrid materials that are tailored for specific, advanced applications.

In this context, this Special Issue will focus on the development of advanced polymer-based hybrid materials based on polymer matrices with different ionic liquids in order to tailor composites, blend characteristics, and functional responses for advanced applications.   

It is our pleasure to invite you to submit your original research papers or state-of-the-art reviews within the scope of this Special Issue.

Dr. Daniela M. Correia
Dr. Carlos Miguel Costa
Dr. Senentxu Lanceros-Mendez
Guest Editors

Manuscript Submission Information

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Keywords

  • hybrid materials
  • composites and blends
  • ionic liquids
  • tailoring properties
  • advanced applications

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Published Papers (2 papers)

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Research

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13 pages, 3033 KiB  
Article
New Insights into the Hygroscopic Character of Ionic Liquids: Study of Fourteen Representatives of Five Cation and Four Anion Families
by Esther Rilo, Alejandro Rosende-Pereiro, Montserrat Domínguez-Pérez, Oscar Cabeza and Luisa Segade
Int. J. Mol. Sci. 2024, 25(8), 4229; https://doi.org/10.3390/ijms25084229 - 11 Apr 2024
Viewed by 875
Abstract
Over the past three decades, the synthesis of new ionic liquids (ILs) and the expansion of their use in newer applications have grown exponentially. From the beginning of this vertiginous period, it was known that many of them were hygroscopic, which in some [...] Read more.
Over the past three decades, the synthesis of new ionic liquids (ILs) and the expansion of their use in newer applications have grown exponentially. From the beginning of this vertiginous period, it was known that many of them were hygroscopic, which in some cases limited their use or altered the value of their measured physical properties with all the problems that this entails. In an earlier article, we addressed the hygroscopic grade achieved by the ILs 1-ethyl-3-methylimidazolium chloride, 1-ethyl-3-methylimidazolium bromide, 1-ethyl-3-methylimidazolium methyl sulfate, 1-ethyl-3-methylimidazolium ethyl sulfate, 1-ethyl-3-methylpyridinium ethyl sulfate, 1-ethyl-3-methylimidazolium tosylate, 1-ethyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-dodecyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylpyridinium tetrafluoroborate, 1-butyl-1-methylpiperidinium bis(trifluoromethyl sulfonyl)imide, 1-methyl-1-propylpyrrolidinium bis(trifluoromethyl sulfonyl)imide, 1-butyl-1-methylpyrrolidinium bis(trifluoromethyl sulfonyl)imide, and methyl trioctyl ammonium bis(trifluoromethyl sulfonyl)imide. The objective was to determine the influence of the chemical nature of the compounds, exposed surface area, sample volume, agitation, and temperature. For this purpose, we exposed the samples to abrupt increases in relative humidity from 15 to 100% for days in an atmosphere chamber and then proceeded with the reverse process in a gentle manner. The results show that the sorption of water from the atmosphere depends on the nature of the IL, especially the anion, with the chloride anion being of particular importance (chloride ≫ alkyl sulfates~bromide > tosylate ≫ tetrafluoroborate). It has also been proven for the EMIM-ES and EMIM-BF4 samples that the mechanism of moisture capture is both absorption and adsorption, and that the smaller the exposed surface area, the higher the ratio of the mass of water per unit area. Full article
(This article belongs to the Special Issue Ionic-Liquid-Based Materials and Their Multi-functional Applications)
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Review

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15 pages, 660 KiB  
Review
Ionic Liquids as Designed, Multi-Functional Plasticizers for Biodegradable Polymeric Materials: A Mini-Review
by Julia L. Shamshina and Paula Berton
Int. J. Mol. Sci. 2024, 25(3), 1720; https://doi.org/10.3390/ijms25031720 - 31 Jan 2024
Cited by 7 | Viewed by 2339
Abstract
Measures to endorse the adoption of eco-friendly biodegradable plastics as a response to the scale of plastic pollution has created a demand for innovative products from materials from Nature. Ionic liquids (ILs) have the ability to disrupt the hydrogen bonding network of biopolymers, [...] Read more.
Measures to endorse the adoption of eco-friendly biodegradable plastics as a response to the scale of plastic pollution has created a demand for innovative products from materials from Nature. Ionic liquids (ILs) have the ability to disrupt the hydrogen bonding network of biopolymers, increase the mobility of biopolymer chains, reduce friction, and produce materials with various morphologies and mechanical properties. Due to these qualities, ILs are considered ideal for plasticizing biopolymers, enabling them to meet a wide range of specifications for biopolymeric materials. This mini-review discusses the effect of different IL-plasticizers on the processing, tensile strength, and elasticity of materials made from various biopolymers (e.g., starch, chitosan, alginate, cellulose), and specifically covers IL-plasticized packaging materials and materials for biomedical and electrochemical applications. Furthermore, challenges (cost, scale, and eco-friendliness) and future research directions in IL-based plasticizers for biopolymers are discussed. Full article
(This article belongs to the Special Issue Ionic-Liquid-Based Materials and Their Multi-functional Applications)
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