Skip to Content
Merck
All Photos(1)

Key Documents

802549

Sigma-Aldrich

Aquivion® D72-25BS

greener alternative

PFSA eq. wt. 720 g/mole SO3H, liquid, dispersion, 25% in water, stabilized CF3 polymer chain ends

Synonym(s):

Aquivion® SO3H-form, Tetrafluoroethylene-perfluoro(3-oxa-4-pentenesulfonic acid) copolymer, Ethanesulfonic acid

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

Linear Formula:
(C4HF7O4S .C2F4)x
UNSPSC Code:
26111700
NACRES:
NA.23
Pricing and availability is not currently available.

Quality Level

100

form

dispersion
liquid

eq. wt.

720±20g/mol (SO3H)

greener alternative product characteristics

Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.

sustainability

Greener Alternative Product

concentration

25±1 % (w/w)

density

1.14 g/mL

greener alternative category

Enabling

Looking for similar products? Visit Product Comparison Guide

Related Categories

General description

Aquivion® PFSA dispersions are derived from a short-side-chain (SSC) copolymer of Tetrafluoroethylene and Sulfonyl Fluoride Vinyl Ether (SFVE), CF2=CF2-O-(CF2)2-SO2F, industrially produced by Syensqo Group. The resulting perfluoropolymer features functional groups in their sulfonic acid form (SO3H). Aquivion® D72-25BS is a perfluorosulfonic acid (PFSA) ionomer dispersion with an Equivalent Weight (EW) of 720 g/eq. The EW of an ionomer represents the weight of the polymer required to provide 1 mole of exchangeable protons, inversely related to the ion exchange capacity (IEC). This dispersion is chemically stabilized, with a significant proportion of polymer end groups converted to an inert trifluoromethyl (CF3) configuration, enhancing the polymer′s lifetime. Aquivion® D72-25BS contains a polymer concentration of 25 wt% in a solvent system that is over 99% water and free of ethers.
We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for energy efficiency and is intended for use as Proton Exchange Membrane (PEM) Fuel Cells. Click here for more information.

Application

The superacidity of Aquivion® PFSA resins, combined with their high functional group concentration and electrochemical stability, makes them essential components in heterogeneous catalysts. Their excellent proton conductivity at low water uptake levels makes them ideal for fabricating separator membranes for proton exchange membranes (PEM) in fuel cells and water electrolyzers, either as stand-alone materials or reinforced with PTFE. Additionally, these resins are frequently used in research as ionomer binders within the catalyst layers of PEM devices and as binders for heterogeneous catalysis in carbon dioxide electrochemistry. They are also applied to the surfaces of specialty fluoropolymers to enhance wettability. Aquivion® D72-25BS, with its short side chain and moderate equivalent weight, is a promising ionomer for achieving high catalyst activity and highly conductive membranes. Ionomers with lower equivalent weights, such as D72-25BS, exhibit greater proton conductivities in electrochemical tests, making them particularly suitable for PEM fuel cells and water electrolyzers. Furthermore, D72-25BS has proven effective for heterogeneous catalysts in carbon dioxide and carbon monoxide electrochemistry, as well as in electrochemical esterifications, etherifications, acylations, and carboxylations. D72-25BS is used to create catalyst ink by dispersing the catalyst, D72-25BS resin, and various solvents, typically water and low alcohols. The ink is then mixed and homogenized, for example, by shear mixing or ultrasonication. Researchers have successfully combined D72-25BS with platinum group catalysts and transition metal catalysts for various chemical reactions due to the ionomer’s resistance to highly aggressive chemical environments, including low pH, strong oxidants, and strong reducing agents.

Features and Benefits

  • Very high concentration of functional groups for strong proton (or Na+, K+, Li+, etc.) conductivity
  • High softening point for high temperature operation well above 80 ºC
  • Strong water retention for better fuel cell operation at low-humidity conditions for membranes or catalyst inks that are utilizing this dispersion material

Legal Information

Aquivion is a registered trademark of Syensqo Group

Storage Class Code

10 - Combustible liquids

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number
MKCX0598
MKCW6137
MKCV4764
MKCR4013
MKCQ3514

Don't see the Right Version?

If you require a particular version, you can look up a specific certificate by the Lot or Batch number.

Search for a COA

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Articles

Perfluorosulfonic Acid Membranes for Fuel Cells

Advances in electrochemical water conversion and understanding PEMFC degradation drive progress in hydrogen technologies.

Perfluorosulfonic Acid Membranes for Fuel Cells

Advances in electrochemical water conversion and understanding PEMFC degradation drive progress in hydrogen technologies.

Perfluorosulfonic Acid Membranes for Fuel Cells

Advances in electrochemical water conversion and understanding PEMFC degradation drive progress in hydrogen technologies.

Perfluorosulfonic Acid Membranes for Fuel Cells

Advances in electrochemical water conversion and understanding PEMFC degradation drive progress in hydrogen technologies.

Questions

1–2 of 2 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

      Helpful?

  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

Reviews

No rating value

Active Filters

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service