Immobilization of Ionic Liquids with a New Cellulose Ester Containing Imidazolium Cation for High‐Performance CO 2 Separation Membranes

2020 ◽  
pp. 2000494
Author(s):  
Yaohui Cheng ◽  
Xin Zhang ◽  
Chunchun Yin ◽  
Jinming Zhang ◽  
Jian Yu ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
High Performance ◽  
Cellulose Ester ◽  
Imidazolium Cation ◽  
Separation Membranes

scholarly journals Theoretical and experimental comparative study of nonlinear properties of imidazolium cation based ionic liquids

2021 ◽  
Vol 328 ◽  
pp. 115391
Author(s):  
Vinícius Castro Ferreira ◽  
Letícia Zanchet ◽  
Wesley Formentin Monteiro ◽  
Letícia Guerreiro da Trindade ◽  
Michèle Oberson de Souza ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Comparative Study ◽  
Imidazolium Cation ◽  
Nonlinear Properties

Benzimidazolyl functionalized ionic liquids as an additive for high performance dye-sensitized solar cells

2011 ◽  
Vol 47 (41) ◽  
pp. 11516 ◽  
Author(s):  
Jie Zhao ◽  
Feng Yan ◽  
Lihua Qiu ◽  
Yueguang Zhang ◽  
Xiaojian Chen ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Solar Cells ◽  
High Performance ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Polyimide-Silica Hybrid Aerogels with High Mechanical Strength for Thermal Insulation Applications

2011 ◽  
Vol 1306 ◽  
Author(s):  
Wenting Dong ◽  
Wendell Rhine ◽  
Shannon White
Keyword(s):  
Thermal Conductivity ◽  
High Performance ◽  
Ambient Conditions ◽  
Separation Membranes ◽  
Low Dielectric ◽  
Aging Conditions ◽  
Hybrid Aerogels ◽  
Mechanical Strengths ◽  
The Relationship ◽  
Silica Hybrid

ABSTRACTHigh performance polyimides have been widely investigated as materials with excellent thermal, mechanical, and electronic properties due to their highly rigid structures. Aspen has developed an approach to prepare polyimide aerogels which have applications as low dielectric constant materials, separation membranes, catalyst supports and insulation materials. In this paper, we will discuss the preparation of polyimide-silica hybrid aerogel materials with good mechanical strengths and low thermal conductivities. The polyimide-silica hybrid aerogels were made by a two-step process and the materials were characterized to determine thermal conductivity and compressive strength. Results show that compressive moduli of the polyimide-silica hybrid aerogels increase dramatically with density (power law relationship). Thermal conductivity of the aerogels is dependent on the aging conditions and density, with the lowest value achieved so far being ~12 mW/m-K at ambient conditions. The relationship between aerogel density and surface area, thermal stability, porosity and morphology of the nanostructure of the polyimide-silica hybrid aerogels are also described in this paper.

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

2016 ◽  
Vol 69 (11) ◽  
pp. 1254 ◽  
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.

Aqueous Biphasic System Containing Long Chain Anion-Functionalized Ionic Liquids for High-Performance Extraction

2015 ◽  
Vol 3 (12) ◽  
pp. 3365-3372 ◽  
Author(s):  
Yuanbang Xie ◽  
Huabin Xing ◽  
Qiwei Yang ◽  
Zongbi Bao ◽  
Baogen Su ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
High Performance ◽  
Biphasic System ◽  
Aqueous Biphasic System ◽  
Aqueous Biphasic ◽  
Chain Anion ◽  
Long Chain

High-performance extraction of alkaloids using aqueous two-phase systems with ionic liquids

2010 ◽  
Vol 12 (10) ◽  
pp. 1715 ◽  
Author(s):  
Mara G. Freire ◽  
Catarina M. S. S. Neves ◽  
Isabel M. Marrucho ◽  
José N. Canongia Lopes ◽  
Luís Paulo N. Rebelo ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
High Performance ◽  
Two Phase ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

Thermally rearranged polybenzoxazoles and poly(benzoxazole-co-imide)s from ortho-hydroxyamine monomers for high performance gas separation membranes

2015 ◽  
Vol 493 ◽  
pp. 329-339 ◽  
Author(s):  
Bibiana Comesaña-Gándara ◽  
Antonio Hernández ◽  
Jose G. de la Campa ◽  
Javier de Abajo ◽  
Angel E. Lozano ◽  
...  
Keyword(s):  
Gas Separation ◽  
High Performance ◽  
Separation Membranes ◽  
Gas Separation Membranes

scholarly journals Bioinspired nano-ordered liquid membrane for precise molecular separation

2020 ◽  
Author(s):  
Haozhen Dou ◽  
Mi Xu ◽  
Baoyu Wang ◽  
Zhen Zhang ◽  
Guobin Wen ◽  
...  
Keyword(s):  
Self Assembly ◽  
High Performance ◽  
Liquid Membrane ◽  
Three Dimensional ◽  
Cellular Membrane ◽  
Liquid Structure ◽  
Long Term Stability ◽  
Separation Membranes ◽  
Molecular Separation

Abstract Cellular membranes provide ideal archetypes for molecule or ion separations with sub-angstrom scale precision, which are featured with both extremely high permeability and selectivity due to the well-defined membrane protein channels. However, the development of bioinspired membranes with artificial channels for sub-angstrom scale ethylene/ethane (0.416 nm / 0.443 nm) separation remains an uncharted territory and a significant challenge. Herein, a bioinspired nano-ordered liquid membrane is constructed by a facile ion/molecule self-assembly strategy for highly efficient ethylene/ethane separation, which mimics the structure of cellular membrane elegantly and possesses plenty of three-dimensional (3D) nanochannels. The elaborate regulation of non-covalent interactions by optimizing the ion/molecule compositions within membrane confers the nano-ordered liquid structure with interpenetrating and bi-continuous apolar domains and polar domains, which results in the formation of regular carrier wires and enormous 3D interconnected ethylene transport nanochannels. By virtue of these 3D nanochannels, the bioinspired nano-ordered liquid membrane manifests simultaneously super-high selectivity, excellent permeance and long-term stability, which exceeds previously reported ethylene/ethane separation membranes. This methodology in this work for construction of bioinspired membrane with tunable 3D nanochannels through ion/molecule self-assembly will enlighten the design and development of high-performance separation membranes for angstrom/sub-angstrom scale ion or molecule separations.

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