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Related Concept Videos

Optimizing Chromatographic Separations01:15

Optimizing Chromatographic Separations

Optimizing chromatographic separations is crucial for obtaining clean separations in a minimum amount of time. Optimization is required for several factors, including kinetic effects related to band broadening, plate height, capacity factor, and separation factor.
Band broadening refers to spreading solute bands as they travel through the column. This broadening can impact resolution. Plate height (H) represents the length required for one theoretical plate. A lower plate height corresponds to...
Detergent Purification of Membrane Proteins01:18

Detergent Purification of Membrane Proteins

Detergents are used to purify the integral proteins of the membrane. The hydrophobic portion of the detergent can replace membrane phospholipids while solubilizing the membrane proteins. When detergent monomers reach a specific concentration in a solution called critical micelle concentration (CMC), they form micelles. Above CMC, the concentration of the detergent monomers remains in equilibrium with the micelle. The number of detergent monomers present in the CMC varies for each detergent, and...
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...
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.
In HPLC, two phases play a critical role in the separation process:
Dialysis01:15

Dialysis

Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...
Supercritical Fluid Chromatography01:18

Supercritical Fluid Chromatography

Supercritical fluid chromatography (SFC) provides a beneficial substitute for gas chromatography (GC) and liquid chromatography (LC) for certain samples because it merges the top attributes of both techniques. SFC allows the separation and analysis of compounds that GC or LC does not easily manage. These compounds are traditionally nonvolatile or thermally unstable, making GC unsuitable and lacking functional groups required for HPLC analysis.
SFC utilizes a supercritical fluid mobile phase,...

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Updated: Jun 16, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

Closed-Loop Chemically Recyclable Separation Membranes With Superior Pervaporation Performance.

Yan Zhuang1, Jia Chen2, Qixin Ren1

  • 1State Key Laboratory of Green Biomanufacturing, National Energy R&D Center for Biorefinery, Beijing University of Chemical Technology, Beijing, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|June 15, 2026
PubMed
Summary
This summary is machine-generated.

This study introduces a novel, light-triggered recyclable membrane made from polydimethylsiloxane (PDMS). This innovative material offers superior ethanol recovery and self-healing properties, addressing end-of-life disposal issues in membrane technology.

Keywords:
closed‐loop chemical recyclingdynamic chemistrypervaporationseparation membranessolid‐liquid conversion

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Last Updated: Jun 16, 2026

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

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Published on: August 16, 2018

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination
09:39

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO2/Si/SiO2 Wafers for Green Desalination

Published on: March 1, 2020

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Membrane technology is an energy-saving separation process with a low carbon footprint.
  • However, the end-of-life disposal of polymer membranes presents significant environmental challenges.
  • Developing sustainable and recyclable membranes is crucial for advancing separation technologies.

Purpose of the Study:

  • To design and fabricate a closed-loop recyclable separation membrane with enhanced performance.
  • To address the issue of end-of-life disposal in polymer membranes.
  • To create a dynamic polydimethylsiloxane (PDMS) network enabling facile recycling and self-healing.

Main Methods:

  • A dynamic PDMS network was constructed using [4 + 4] photodimerization of anthracene-grafted PDMS under 365-nm UV light.
  • The crosslinked membranes were deconstructed into linear polymers using 254-nm UV light at ambient temperature.
  • Pervaporation performance and recycling efficiency were evaluated for ethanol recovery.

Main Results:

  • The facile deconstruction process was completed within 35 minutes.
  • Recycling demonstrated efficient PDMS network reconstruction with 92.6% conversion of anthracene groups in 10 minutes.
  • The membrane achieved a high pervaporation separation index of 13,285 for ethanol recovery, surpassing existing PDMS membranes.
  • The recycled membrane maintained performance over five cycles and exhibited self-healing capabilities.

Conclusions:

  • A light-triggered, closed-loop recyclable PDMS membrane with superior pervaporation performance and self-healing properties was successfully developed.
  • The proposed design offers a scalable and sustainable solution for membrane technology, adaptable to various separation applications.
  • This approach mitigates environmental concerns associated with membrane disposal while enhancing separation efficiency.