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Related Concept Videos

Membrane Fluidity01:23

Membrane Fluidity

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Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.
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Membrane Fluidity01:26

Membrane Fluidity

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Membrane fluidity is explained by the fluid mosaic model of the cell membrane, which describes the plasma membrane structure as a mosaic of components—including phospholipids, cholesterol, proteins, and carbohydrates—that gives the membrane a fluid character.
Mosaic nature of the membrane
The mosaic characteristic of the membrane helps the plasma membrane remain fluid. The integral proteins and lipids exist as separate but loosely-attached molecules in the membrane. The membrane is...
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Detergent Purification of Membrane Proteins01:18

Detergent Purification of Membrane Proteins

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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...
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Dialysis01:15

Dialysis

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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...
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What are Membranes?01:54

What are Membranes?

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A key characteristic of life is the ability to separate the external environment from the internal space. To do this, cells have evolved semi-permeable membranes that regulate the passage of biological molecules. Additionally, the cell membrane defines a cell’s shape and interactions with the external environment. Eukaryotic cell membranes also serve to compartmentalize the internal space into organelles, including the endomembrane structures of the nucleus, endoplasmic reticulum and...
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Chromatography: Introduction01:10

Chromatography: Introduction

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Chromatography is a technique used to separate compounds based on differences of partitioning between two phases, the stationary phase and the mobile phase.
The phase in which the compounds linger or on which the compounds adsorb is called the stationary phase, whereas the mobile phase is the solvent that carries the solutes to be analyzed. In traditional column chromatography, the mixture flows through the stationary phase, and the compounds partition between the stationary and mobile phases...
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Related Experiment Video

Updated: Nov 29, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
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2D Material Based Advanced Membranes for Separations in Organic Solvents.

Xiao Sui1, Ziwen Yuan1, Yanxi Yu1

  • 1School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia.

Small (Weinheim an Der Bergstrasse, Germany)
|November 20, 2020
PubMed
Summary

Two-dimensional (2D) material membranes show promise for organic solvent separations due to their unique properties. This review highlights their current applications, design strategies, and future challenges for advanced separation technologies.

Keywords:
2D material membranesMXenescovalent organic frameworksgrapheneorganic solvent separations

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Separation Science

Background:

  • Two-dimensional (2D) materials offer unique properties for advanced membrane fabrication.
  • Existing research primarily focuses on 2D material membranes for gas and aqueous separations.
  • Emerging applications leverage 2D materials' ultrathin nature and solvent resistance for organic separations.

Purpose of the Study:

  • To provide a comprehensive overview of 2D material membranes for organic solvent separations.
  • To summarize state-of-the-art fabrication methods and performance of these membranes.
  • To identify key challenges and future research directions in this field.

Main Methods:

  • Review of existing literature on 2D material membranes.
  • Analysis of membrane fabrication techniques using graphene and non-graphene 2D materials (e.g., COFs, MXenes).
  • Examination of membrane design strategies and their impact on separation performance.

Main Results:

  • 2D material membranes, including graphene, covalent organic frameworks (COFs), and MXenes, demonstrate significant potential in organic solvent separations.
  • Various design strategies influence the permeability and selectivity of these membranes.
  • Key challenges include standardization, mechanistic understanding, and scalability.

Conclusions:

  • 2D material membranes represent a promising frontier for efficient organic solvent separations.
  • Addressing challenges in standardization, mechanism elucidation, and scalability is crucial for practical application.
  • Further research is needed to optimize performance and expand the versatility of these advanced membranes.