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Journal Article 4

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2009 1

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Separations 2

Functional capsules 1

Host–guest complexation 1

Ion-exchange membranes 1

Molecular-recognizable nanogels 1

Organic micro-pollutants 1

Selectivity 1

chiral ionic liquids 1

compact processes 1

equations of state 1

hydrophilicity 1

membrane separations 1

modification 1

poly(aryl sulfone) 1

separations 1

thermodynamic properties 1

water treatment 1

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Advancing ion-exchange membranes to ion-selective membranes: principles, status, and opportunities

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 2, doi: 10.1007/s11783-023-1625-0

Abstract:

● IEM ion/ion selectivities of charge, valence, & specific ion are critically assessed.

Keywords： Ion-exchange membranes     Selectivity     Separations    

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Hydrophilic modification of poly(aryl sulfone) membrane materials toward highly-efficient environmental remediation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 5,   Pages 614-633 doi: 10.1007/s11705-021-2115-1

Abstract: Poly(aryl sulfone) as a typical membrane material has been widely used due to excellent mechanical, chemical and thermal stability. However, the inherent hydrophobicity of poly(aryl sulfone) based membranes bears with the fouling issue during applications, which makes the membrane tending to adsorb contaminants on the surface so as to result in decreased separation performance and lifetime. In this critical review, we give a comprehensive overview on characterizations of hydrophilic membrane and diverse hydrophilic modification approaches of poly(aryl sulfone) membranes, predominantly including bulky, blending and surface modification technology. The discussions on the different modification methods have been provided in-depth. Besides, focusing on modification methods and performance of modified membranes, the related mechanisms for the performance enhancement are discussed too. At last, the perspectives are provided to guide the future directions to develop novel technology to manipulate the hydrophilicity of poly(aryl sulfone) membranes toward diverse practical and multi-functional applications.

Keywords： poly(aryl sulfone)     membrane separations     modification     hydrophilicity     water treatment    

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Measurement and correlation of supercritical CO

Hiroshi MACHIDA, Ryosuke TAGUCHI, Yoshiyuki SATO, Louw J. FLOURUSSE, Cor J. PETERS, Richard L. SMITH

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 1,   Pages 12-19 doi: 10.1007/s11705-009-0151-3

Abstract: Ionicliquids combined with supercritical fluid technology hold great promise as working solvents for developing compact processes. Ionic liquids, which are organic molten salts, typically have extremely low volatility and high functionality, but possess high viscosities, surface tensions and low diffusion coefficients, which can limit their applicability. CO , on the other hand, especially in its supercritical state, is a green solvent that can be used advantageously when combined with the ionic liquid to provide viscosity and surface tension reduction and to promote mass transfer. The solubility of CO in the ionic liquid is key to estimating the important physical properties that include partition coefficients, viscosities, densities, interfacial tensions, thermal conductivities and heat capacities needed in contactor design. In this work, we examine a subset of available high pressure pure component ionic liquid PVT data and high pressure CO - ionic liquid solubility data and report new correlations for CO -ionic liquid systems with equations of state that have some industrial applications including: (1) general, (2) fuel desulfurization, (3) CO capture, and (4) chiral separation. New measurements of solubility data for the CO and 1-butyl-3-methylimidazolium octyl sulfate, [bmim][OcSO ] system are reported and correlated. In the correlation of the CO ionic liquid phase behavior, the Peng-Robinson and the Sanchez-Lacombe equations of state were considered and are compared. It is shown that excellent correlation of CO solubility can be obtained with either equation and they share some common characteristics regarding interaction parameters. In the Sanchez-Lacombe equation, parameters that are derived from the supercritical region were found to be important for obtaining good correlation of the CO -ionic liquid solubility data.

Keywords： compact processes     chiral ionic liquids     separations     thermodynamic properties     equations of state    

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Functional Capsules Encapsulating Molecular-Recognizable Nanogels for Facile Removal of Organic Micro-Pollutants from Water Article

Wen-Ying Liu, Xiao-Jie Ju, Xing-Qun Pu, Quan-Wei Cai, Yu-Qiong Liu, Zhuang Liu, Wei Wang, Rui Xie, Liang-Yin Chu

Engineering 2021, Volume 7, Issue 5,   Pages 636-646 doi: 10.1016/j.eng.2021.02.007

Abstract:

A novel method has been successfully developed for the facile and efficient removal of organic micropollutants (OMP) from water based on novel functional capsules encapsulating molecular-recognizable nanogels. The functional capsules are composed of ultrathin calcium alginate (Ca-Alg) hydrogel shells as semipermeable membranes and encapsulated poly(N-isopropylacrylamide-co-acrylic acid-g-mono-
(6-ethanediamine-6-deoxy)-β-cyclodextrin) (PNCD) nanogels with β-cyclodextrin (CD) moieties as OMP capturers. The semipermeable membranes of the capsules enable the free transfer of OMP and water molecules across the capsule shells, but confine the encapsulated PNCD nanogels within the capsules. Bisphenol A (BPA), an endocrine-disrupting chemical that is released from many plastic water containers, was chosen as a model OMP molecule in this study. Based on the host–guest recognition complexation, the CD moieties in the PNCD nanogels can efficiently capture BPA molecules. Thus, the facile and efficient removal of BPA from water can be achieved by immersing the proposed functional capsules into BPAcontaining aqueous solutions and then simply removing them, which is easily done due to the capsules’ characteristically large size of up to several millimeters. The kinetics of adsorption of BPA molecules by the capsules is well described by a pseudo-second-order kinetic model, and the isothermal adsorption thermodynamics align well with the Freundlich and Langmuir isothermal adsorption models. The regeneration of capsules can be achieved simply by washing them with water at temperatures above the volume phase transition temperature of the PNCD nanogels. Thus, the proposed functional capsules encapsulating molecular-recognizable nanogels provide a novel strategy for the facile and efficient removal of OMP from water.

Keywords： Functional capsules     Molecular-recognizable nanogels     Organic micro-pollutants     Host–guest complexation     Separations    

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Title Author Date Type Operation

Advancing ion-exchange membranes to ion-selective membranes: principles, status, and opportunities

Journal Article

Hydrophilic modification of poly(aryl sulfone) membrane materials toward highly-efficient environmental remediation

Journal Article

Measurement and correlation of supercritical CO

Hiroshi MACHIDA, Ryosuke TAGUCHI, Yoshiyuki SATO, Louw J. FLOURUSSE, Cor J. PETERS, Richard L. SMITH

Journal Article

Functional Capsules Encapsulating Molecular-Recognizable Nanogels for Facile Removal of Organic Micro-Pollutants from Water

Wen-Ying Liu, Xiao-Jie Ju, Xing-Qun Pu, Quan-Wei Cai, Yu-Qiong Liu, Zhuang Liu, Wei Wang, Rui Xie, Liang-Yin Chu

Journal Article