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
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100 μG
₩870,769
About This Item
Linear Formula:
(C4HF7O4S .C2F4)x
UNSPSC Code:
26111700
NACRES:
NA.23
Recommended Products
Quality Level
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
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sustainability
Greener Alternative Product
concentration
25±1 % (w/w)
density
1.14 g/mL
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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This Item | 1.02765 | 310433 | 1.02766 |
|---|---|---|---|
| form solid | form solid | form needles | form solid |
| assay (oxygen demand as CuO)- ≥ 55.0 % | assay (oxygen demand as CuO): -≥ 55.0 % | assay - | assay ≥99.0% (complexometric) |
| mp 1300 °C | mp 1300 °C | mp - | mp 1326 °C (decomposition) |
| density 6.2 g/cm3 at 20 °C | density 6.2 g/cm3 at 20 °C | density - | density 6.48 g/cm3 at 25 °C |
| cation traces C: ≤0.002%, N: ≤0.002% | cation traces C: ≤0.002%, N: ≤0.002% | cation traces C: ≤0.002%, N: ≤0.002% | cation traces C: ≤0.01%, Ca: ≤0.01%, Cr: ≤0.05%, Fe: ≤0.05%, K: ≤0.02%, N: ≤0.002%, Na: ≤0.05%, Pb: ≤0.05%, excess alkali:, passes test |
| weight =79.54 g/mol | weight =79.54 g/mol | weight - | weight - |
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Storage Class Code
10 - Combustible liquids
WGK
WGK 3
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Protocols
Enzymatic Assay of Fructose-6-Phosphate Kinase Pyrophosphate Dependent
Clotilde LowKam et al.
The Journal of biological chemistry, 285(27), 21143-21152 (2010-04-30)
Tagatose-1,6-bisphosphate aldolase from Streptococcus pyogenes is a class I aldolase that exhibits a remarkable lack of chiral discrimination with respect to the configuration of hydroxyl groups at both C3 and C4 positions. The enzyme catalyzes the reversible cleavage of four
Bang Shen et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(9), 3567-3572 (2014-02-20)
Gliding motility and host-cell invasion by apicomplexan parasites depend on cell-surface adhesins that are translocated via an actin-myosin motor beneath the membrane. The current model posits that fructose-1,6-bisphosphate aldolase (ALD) provides a critical link between the cytoplasmic tails of transmembrane
Tiia Kittilä et al.
Chembiochem : a European journal of chemical biology, 17(7), 576-584 (2016-01-12)
Nonribosomal peptide synthetases (NRPSs) produce many important and structurally complex natural products. Because of their architectures, reprogramming NRPSs has long been attempted to access new bioactive compounds. However, detailed characterization of NRPS catalysis and substrate selectivity by adenylation (A) domains