Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Ion Exchange01:17

Ion Exchange

1.4K
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...
1.4K
Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

1.9K
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...
1.9K
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

2.4K
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...
2.4K
Olefin Metathesis Polymerization: Overview01:13

Olefin Metathesis Polymerization: Overview

2.6K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
2.6K
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)01:16

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

3.2K
Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...
3.2K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Supramolecular Anchoring of Charge-Asymmetric COF Interfaces to Regulate Ion Rectification for Monolithic Flexible Supercapacitors.

Nano letters·2026
Same author

Molecular Tuning of Ether Cosolvent Chemistry for High-Voltage Sodium-Ion Batteries.

Journal of the American Chemical Society·2026
Same author

Proteomic maps of synapses and synaptic vesicles across the central and enteric nervous systems.

Communications biology·2026
Same author

The clinical features, pathological assessment, and prognostic analysis of autoimmune hepatitis in Chinese persons living with HIV.

BMC infectious diseases·2026
Same author

The Therapeutic Potential of Mesenchymal Stem Cells in Post-Stroke Depression.

International journal of molecular sciences·2026
Same author

Preparation, Oral SNEDDS Formulation, and In Vivo Evaluation of the HIV-1 Latency-Reversing Agent EK-16A.

Molecules (Basel, Switzerland)·2026

Related Experiment Video

Updated: Feb 27, 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

10.5K

High-Performance Semicrystalline Poly(ether ketone)-Based Proton Exchange Membrane.

Sinan Feng1,2, Jinhui Pang2, Xingwen Yu1

  • 1Materials Science & Engineering Program and Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712, United States.

ACS Applied Materials & Interfaces
|July 7, 2017
PubMed
Summary

A new semicrystalline poly(ether ketone) proton exchange membrane (semi-SPEK-x) was developed. This membrane shows low water uptake and reduced methanol permeability, enhancing direct methanol fuel cell performance.

Keywords:
fuel celllow methanol permeabilitypoly(ether ketone)proton exchange membranesemicrystalline polymers

More Related Videos

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
07:55

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device

Published on: July 20, 2021

11.9K
Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

9.0K

Related Experiment Videos

Last Updated: Feb 27, 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

10.5K
Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
07:55

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device

Published on: July 20, 2021

11.9K
Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

9.0K

Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Chemistry

Background:

  • Proton exchange membranes (PEMs) are crucial for fuel cell technology.
  • Developing PEMs with improved stability and performance is an ongoing challenge.
  • Semicrystalline polymers offer potential advantages in controlling membrane properties.

Purpose of the Study:

  • To develop a novel semicrystalline poly(ether ketone)-based proton exchange membrane (semi-SPEK-x).
  • To investigate the impact of semicrystallinity on membrane properties and direct methanol fuel cell (DMFC) performance.

Main Methods:

  • A one-step sulfonation and hydrolysis process was used to synthesize semi-SPEK-x from a poly(ether ketimine) precursor.
  • Ion-exchange capacity (IEC) was measured.
  • Water uptake, volume swelling, and methanol permeability were evaluated.
  • DMFC performance was assessed.

Main Results:

  • The synthesized semi-SPEK-x polymers exhibited ion-exchange capacities ranging from 1.49 to 2.00 mequiv g⁻¹.
  • The membranes maintained semicrystalline features in both dry and hydrated states.
  • Low water uptake and low volume swelling ratios were observed due to the semicrystalline domains.
  • Significantly reduced methanol permeability was achieved.
  • Overall performance of direct methanol fuel cells was improved.

Conclusions:

  • The novel semicrystalline poly(ether ketone) membrane (semi-SPEK-x) offers a promising alternative for fuel cell applications.
  • The inherent semicrystalline structure effectively mitigates methanol crossover while maintaining ion conductivity.
  • This approach enhances the durability and efficiency of direct methanol fuel cells.