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Related Concept Videos

Ion Exchange01:17

Ion Exchange

1.1K
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...
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Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

1.5K
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
1.5K
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

1.8K
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...
1.8K
Dialysis01:15

Dialysis

1.6K
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...
1.6K
Chemiosmosis and ATP Synthesis01:22

Chemiosmosis and ATP Synthesis

1.7K
The electron transport chain is a critical component of cellular respiration, occurring in the inner mitochondrial membrane. It facilitates the transfer of high-energy electrons from reduced cofactors NADH and FADH₂ to molecular oxygen, the final electron acceptor. This transfer of electrons through a series of protein complexes is tightly coupled to the translocation of protons across the membrane, generating a proton gradient essential for ATP synthesis.Electron Flow and Proton...
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Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
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CytroCell@Nafion: Enhanced Proton Exchange Membranes.

Daria Talarico1, Enrica Fontananova1, Teresa Sibillano2

  • 1Istituto per la Tecnologia delle Membrane CNR Rende (CS) Italy.

Global Challenges (Hoboken, NJ)
|December 15, 2025
PubMed
Summary
This summary is machine-generated.

Lemon nanocellulose enhances Nafion proton exchange membranes (PEMs) for fuel cells. Adding 10% CytroCell improved conductivity and flexibility, offering a promising biobased alternative for clean energy technologies.

Keywords:
CytroCellNafionnanocelluloseproton exchange membranewater electrolysis

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Science

Background:

  • Proton exchange membranes (PEMs) are crucial for fuel cells and electrolyzers.
  • Nafion is a widely used perfluorosulfonic acid ionomer in PEMs.
  • Developing sustainable and high-performance membrane materials is an ongoing research area.

Purpose of the Study:

  • To investigate lemon-derived CytroCell nanocellulose as a biobased filler for Nafion.
  • To prepare and characterize CytroCell@Nafion composite membranes.
  • To evaluate the impact of CytroCell on membrane properties, including proton conductivity and mechanical performance.

Main Methods:

  • Composite membranes were fabricated using a casting and solvent evaporation technique.
  • Varying concentrations of CytroCell (up to 20 wt.%) were incorporated into a Nafion ionomer solution.
  • Proton conductivity, flexibility, and ductility of the composite membranes were assessed.

Main Results:

  • CytroCell@Nafion composite membranes exhibited molecular-scale homogeneity.
  • Optimal proton conductivity was achieved with 10 wt.% CytroCell loading.
  • The composite membranes demonstrated enhanced flexibility and ductility compared to pristine Nafion.

Conclusions:

  • Lemon CytroCell nanocellulose is a viable biobased filler for enhancing Nafion-based PEMs.
  • The optimized composite membrane shows potential for improved performance in fuel cell and electrolyzer applications.
  • Further investigation into long-term operational stability is warranted to confirm applicability in devices.