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Related Concept Videos

Ion Exchange01:17

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...
High-Performance Liquid Chromatography: Elution Process01:05

High-Performance Liquid Chromatography: Elution Process

In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...
Phase I Reactions: Hydrolytic Reactions01:15

Phase I Reactions: Hydrolytic Reactions

Hydrolysis, a cornerstone of phase I biotransformation reactions, uses water to cleave chemical bonds. This process is pivotal in drug metabolism, generating more polar metabolites that can be easily excreted.
An important hydrolytic reaction is ester hydrolysis. Ester bonds, often found in prodrugs, are broken down, increasing the solubility of drugs like aspirin and lidocaine for more straightforward elimination. Amide hydrolysis is another critical reaction, targeting amide bonds prevalent...
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
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Alkynes to Aldehydes and Ketones: Acid-Catalyzed Hydration02:40

Alkynes to Aldehydes and Ketones: Acid-Catalyzed Hydration

Introduction
Analogous to alkenes, alkynes also undergo acid-catalyzed hydration. While the addition of water to an alkene gives an alcohol, hydration of alkynes produces different products such as aldehydes and ketones.

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Related Experiment Video

Updated: May 28, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

Ionic liquids as internal phase for non-aqueous polyHIPEs.

Natasha Shirshova1, Alexander Bismarck, Joachim H G Steinke

  • 1Department of Chemical Engineering, Polymer and Composite Engineering (PaCE) Group, Imperial College London, London, UK. n.shirshova@imperial.ac.uk

Macromolecular Rapid Communications
|October 14, 2011
PubMed
Summary
This summary is machine-generated.

Researchers created stable high internal phase emulsions (HIPEs) using ionic liquids, polymerizing them into polyHIPEs. These novel porous materials offer thermal stability for applications where water is unsuitable.

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Synthesis of Poly(N-isopropylacrylamide) Janus Microhydrogels for Anisotropic Thermo-responsiveness and Organophilic/Hydrophilic Loading Capability
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Last Updated: May 28, 2026

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Synthesis of Poly(N-isopropylacrylamide) Janus Microhydrogels for Anisotropic Thermo-responsiveness and Organophilic/Hydrophilic Loading Capability
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Published on: February 27, 2016

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • High internal phase emulsions (HIPEs) are versatile templates for creating porous polymers.
  • Traditional HIPE synthesis often relies on aqueous dispersed phases, limiting applications where water is chemically or physically undesirable.

Purpose of the Study:

  • To develop novel polyHIPEs using ionic liquids as the dispersed phase.
  • To investigate the properties and potential applications of these ionic liquid-derived polyHIPEs.

Main Methods:

  • Preparation of stable high internal phase emulsions (HIPEs) using 1-ethyl-3-methylimidazolium bis(trifluoromethyl-sulfonyl)imide as the dispersed phase.
  • Thermal polymerization of the HIPEs to form polyHIPEs.
  • Characterization of the resulting polyHIPEs' morphology and thermal properties.

Main Results:

  • Stable HIPEs were successfully prepared with an ionic liquid as the dispersed phase.
  • The resulting polyHIPEs exhibited similar pore morphologies to those derived from aqueous phases.
  • PolyHIPEs demonstrated a low glass transition temperature (T(g)) and excellent thermal stability above 200 °C.

Conclusions:

  • Ionic liquid-based HIPEs can be effectively polymerized into robust polyHIPEs.
  • These polyHIPEs present a viable alternative to water-based systems for creating porous materials.
  • The thermal stability and tunable properties suggest potential for advanced applications in various fields.