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802565

Aquivion® D79-25BS

liquid, dispersion, 25% in water, PFSA eq. wt. 790 g/mole SO3H, contains CF3 polymer chain ends as stabilizer

Sustainability features

Synonym(s):

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

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Size/SKUAvailabilityPrice
25 mL

Available to ship TODAYfromMILWAUKEE

$462.00
250 mL

Available to ship TODAYfromMILWAUKEE

$2,870.00

About This Item

Linear Formula:
(C4HF7O4S .C2F4)x
NACRES:
NA.23
UNSPSC Code:
26111700

$462.00

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Quality Segment

form

dispersion, liquid

eq. wt.

790±20g/mol (SO3H)

contains

CF3 polymer chain ends as stabilizer

composition

25% in water

sustainability

Sustainability features

concentration

25±1 % (w/w)

density

1.14 g/mL

application(s)

PEM fuel cells
hydrogen and fuel cell

greener alternative category

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® D79-25BS is a perfluorosulfonic acid (PFSA) ionomer dispersion with an Equivalent Weight (EW) of 790 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® D79-25BS 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, along with their high functional group concentration and electrochemical stability, makes them essential components in heterogeneous catalysts. Because of their excellent proton conductivity at low water uptake, these resins are used frequently in research as ionomer binders within the catalyst layers of proton exchange membranes (PEM) for fuel cells and water electrolyzers. Additionally, these resins are utilized in the fabrication of separator membranes (PEMs), either as stand-alone materials or reinforced with PTFE. They are also applied to the surfaces of specialty fluoropolymers to enhance wettability. Aquivion® D79-25BS, characterized by its short side chain and moderate equivalent weight, is a promising ionomer for achieving high catalyst activity. Ionomers with lower equivalent weights, such as D79-25BS, exhibit greater proton conductivities in electrochemical tests. This makes D79-25BS particularly suitable for use in PEM fuel cells and water electrolyzers. Additionally, it has proven to be an effective ionomer for heterogeneous catalysts in carbon dioxide and carbon monoxide electrochemistry. Researchers have successfully combined D79-25BS with platinum group catalysts and transition metal catalysts for various chemical reactions, owing 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

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Aquivion® D79-25BS liquid, dispersion, 25% in water, PFSA eq. wt. 790 g/mole SO3H, contains CF3 polymer chain ends as stabilizer

Sigma-Aldrich

802565

Aquivion® D79-25BS

Aquivion® D72-25BS PFSA eq. wt. 720 g/mole SO3H, liquid, dispersion, 25% in water, stabilized CF3 polymer chain ends

Sigma-Aldrich

802549

Aquivion® D72-25BS

Sigma-Aldrich

Sigma-Aldrich

802557

Aquivion® D98-25BS

Aquivion® D87-28BS liquid, dispersion, 28% in water, PFSA eq. wt. 870 g/mole SO3H

Sigma-Aldrich

802654

Aquivion® D87-28BS

description

liquid, dispersion, 25% in water, PFSA eq. wt. 790 g/mole SO3H, contains CF3 polymer chain ends as stabilizer

description

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

description

liquid, dispersion, 25% in water, PFSA eq. wt. 980 g/mole SO3H, contains CF3 polymer chain ends as stabilizer

description

liquid, dispersion, 28% in water, PFSA eq. wt. 870 g/mole SO3H

Quality Level

100

Quality Level

100

Quality Level

100

Quality Level

100

application(s)

PEM fuel cells
hydrogen and fuel cell

application(s)

PEM fuel cells
hydrogen and fuel cell

application(s)

PEM fuel cells
hydrogen and fuel cell

application(s)

PEM fuel cells
hydrogen and fuel cell

form

dispersion, liquid

form

liquid, dispersion

form

liquid, dispersion

form

liquid, dispersion

contains

CF3 polymer chain ends as stabilizer

contains

-

contains

CF3 polymer chain ends as stabilizer

contains

-

composition

25% in water

composition

-

composition

25% in water

composition

28% in water

greener alternative product characteristics

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

greener alternative product characteristics

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

greener alternative product characteristics

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

greener alternative product characteristics

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

Storage Class

10 - Combustible liquids

WGK

WGK 3

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Questions

1–3 of 3 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/418/501/product-dating-information-06-25-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?

  3. Can I know the ionic conductivity of Aquivion® D79-25BS? If possible, I would like to know the ionic conductivity at different temperatures.

    1 answer

    1. Ionic conductivity is not determined during the quality control process for this product.

      Helpful?

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