802565

Aquivion^® D79-25BS

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

• Synonym(s): Aquivion^® SO₃H-form, Tetrafluoroethylene-perfluoro(3-oxa-4-pentenesulfonic acid) copolymer, Ethanesulfonic acid
• Linear Formula: (C₄HF₇O₄S .C₂F₄)_x
• UNSPSC Code: 26111700
• NACRES: NA.23

Properties

• Quality Level: 100
• form: dispersion; liquid
• eq. wt.: 790±20g/mol (SO₃H)
• contains: CF₃ polymer chain ends as stabilizer
• composition: 25% in water
• 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

Description

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

Safety Information

• Storage Class: 10 - Combustible liquids
• wgk_germany: WGK 3