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Related Concept Videos

Cellulose and Pectic Polysaccharides01:15

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 Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth.  Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
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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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Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film
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Low-Alpha-Cellulose-Based Membranes.

Igor Makarov1, Gulbarshin Shambilova2,3, Aigul Bukanova3

  • 1A.V. Topchiev Institute of Petrochemical Synthesis RAS, Leninsky Prospect 29, 119991 Moscow, Russia.

Polymers
|March 13, 2025
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Summary
This summary is machine-generated.

This study explores using pulp cellulose for membranes, finding that lignin content influences properties like strength and dye rejection. These findings suggest potential for new cellulose-based materials.

Keywords:
N-methylmorpholine-N-oxidealpha fractionbiodegradabilitycellulosecellulosic membraneshemicellulosemorphologypermeabilitytransport properties

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Chemical Engineering

Background:

  • Cellulose production methods significantly affect its alpha fraction content.
  • Paper pulp, with less than 90% alpha fraction, differs from dissolving cellulose.
  • Cellulose satellites do not hinder concentrated N-methylmorpholine-N-oxide (NMMO) solutions.

Purpose of the Study:

  • Investigate spinning solutions from low alpha fraction cellulose (pulp cellulose).
  • Examine morphological features and rheological behavior of these solutions.
  • Explore the potential of rolling solutions to create cellulose membranes.

Main Methods:

  • Utilized X-ray diffraction, IR spectroscopy, Atomic Force Microscopy (AFM), and Scanning Electron Microscopy (SEM).
  • Analyzed the structure and morphology of membranes derived from pulp cellulose.
  • Evaluated membrane properties including strength, elastic modulus, contact angle, and dye rejection.

Main Results:

  • Membrane crystallinity varied with impurity content.
  • Films exhibited a dense texture without vacuoles.
  • Bleached hardwood sulfate cellulose yielded membranes with highest strength (5.7 MPa) and elastic modulus (6.4 GPa).
  • Higher lignin content correlated with increased contact angle (up to 48°) and enhanced rejection of anionic dyes.

Conclusions:

  • Pulp cellulose can be processed into membranes with controllable properties.
  • Lignin presence positively impacts membrane performance in dye rejection.
  • The study demonstrates potential for utilizing lower-grade cellulose in membrane fabrication.