Soft nanoconfinement of ionic liquids in lyotropic liquid crystals

Alireza Bandegi; Maria Marquez Garcia; Jose L. Bañuelos; Millicent A. Firestone; Reza Foudazi

doi:10.1039/d1sm00796c

Soft nanoconfinement of ionic liquids in lyotropic liquid crystals

Alireza Bandegi
, Maria Marquez Garcia
, Jose L. Bañuelos
, Millicent A. Firestone
, Reza Foudazi

Los Alamos National Laboratory

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Nanoconfinement of ionic liquids (ILs) influences their physicochemical properties. In this study, we investigate the effect of soft nanoconfinement imposed by lyotropic liquid crystals (LLCs) on ILs. The LLC ion gels are obtained through self-assembly of a short chain block copolymer (BCP) of polyethylene-block-poly(ethylene oxide), PE-b-PEO, in ILs. The effect of confinement on the interaction of ions with PEO is investigated through electrochemical impedance spectroscopy (EIS) and carbon dioxide (CO₂) absorption measurements. The results show that the synergistic effect on the CO₂absorption capacity of LLC ion gels takes place as a result of confinement. Formation of IL pathways through the LLC increases the CO₂solubility, absorption capacity, and absorption rate. Increasing the concentration of block copolymer in the LLC structure enhances the dissociation of ILs and consequently lowers CO₂absorption. Therefore, the competing effects of confinement and IL-PEO interaction control the properties of LLC ion gels.

Original language	English
Pages (from-to)	8118-8129
Number of pages	12
Journal	Soft Matter
Volume	17
Issue number	35
DOIs	https://doi.org/10.1039/d1sm00796c
State	Published - Sep 21 2021

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title = "Soft nanoconfinement of ionic liquids in lyotropic liquid crystals",

abstract = "Nanoconfinement of ionic liquids (ILs) influences their physicochemical properties. In this study, we investigate the effect of soft nanoconfinement imposed by lyotropic liquid crystals (LLCs) on ILs. The LLC ion gels are obtained through self-assembly of a short chain block copolymer (BCP) of polyethylene-block-poly(ethylene oxide), PE-b-PEO, in ILs. The effect of confinement on the interaction of ions with PEO is investigated through electrochemical impedance spectroscopy (EIS) and carbon dioxide (CO2) absorption measurements. The results show that the synergistic effect on the CO2absorption capacity of LLC ion gels takes place as a result of confinement. Formation of IL pathways through the LLC increases the CO2solubility, absorption capacity, and absorption rate. Increasing the concentration of block copolymer in the LLC structure enhances the dissociation of ILs and consequently lowers CO2absorption. Therefore, the competing effects of confinement and IL-PEO interaction control the properties of LLC ion gels.",

author = "Alireza Bandegi and \{Marquez Garcia\}, Maria and Ba{\~n}uelos, \{Jose L.\} and Firestone, \{Millicent A.\} and Reza Foudazi",

year = "2021",

month = sep,

day = "21",

doi = "10.1039/d1sm00796c",

language = "English",

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pages = "8118--8129",

journal = "Soft Matter",

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publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Soft nanoconfinement of ionic liquids in lyotropic liquid crystals

AU - Bandegi, Alireza

AU - Marquez Garcia, Maria

AU - Bañuelos, Jose L.

AU - Firestone, Millicent A.

AU - Foudazi, Reza

PY - 2021/9/21

Y1 - 2021/9/21

N2 - Nanoconfinement of ionic liquids (ILs) influences their physicochemical properties. In this study, we investigate the effect of soft nanoconfinement imposed by lyotropic liquid crystals (LLCs) on ILs. The LLC ion gels are obtained through self-assembly of a short chain block copolymer (BCP) of polyethylene-block-poly(ethylene oxide), PE-b-PEO, in ILs. The effect of confinement on the interaction of ions with PEO is investigated through electrochemical impedance spectroscopy (EIS) and carbon dioxide (CO2) absorption measurements. The results show that the synergistic effect on the CO2absorption capacity of LLC ion gels takes place as a result of confinement. Formation of IL pathways through the LLC increases the CO2solubility, absorption capacity, and absorption rate. Increasing the concentration of block copolymer in the LLC structure enhances the dissociation of ILs and consequently lowers CO2absorption. Therefore, the competing effects of confinement and IL-PEO interaction control the properties of LLC ion gels.

AB - Nanoconfinement of ionic liquids (ILs) influences their physicochemical properties. In this study, we investigate the effect of soft nanoconfinement imposed by lyotropic liquid crystals (LLCs) on ILs. The LLC ion gels are obtained through self-assembly of a short chain block copolymer (BCP) of polyethylene-block-poly(ethylene oxide), PE-b-PEO, in ILs. The effect of confinement on the interaction of ions with PEO is investigated through electrochemical impedance spectroscopy (EIS) and carbon dioxide (CO2) absorption measurements. The results show that the synergistic effect on the CO2absorption capacity of LLC ion gels takes place as a result of confinement. Formation of IL pathways through the LLC increases the CO2solubility, absorption capacity, and absorption rate. Increasing the concentration of block copolymer in the LLC structure enhances the dissociation of ILs and consequently lowers CO2absorption. Therefore, the competing effects of confinement and IL-PEO interaction control the properties of LLC ion gels.

UR - https://www.scopus.com/pages/publications/85114597928

U2 - 10.1039/d1sm00796c

DO - 10.1039/d1sm00796c

M3 - Article

SN - 1744-683X

VL - 17

SP - 8118

EP - 8129

JO - Soft Matter

JF - Soft Matter

IS - 35

ER -

Soft nanoconfinement of ionic liquids in lyotropic liquid crystals

Abstract

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