DuPont™ Nafion® PFSA Polymer Dispersions

Views： Added：2025-06-02

DuPont™ Nafion® PFSA Polymer Dispersions

High-Performance Proton Conductive Dispersions for Fuel Cells, Electrolysis, and Advanced Electrochemical Applications

🧾 Product Overview

DuPnt™ Nafion® PFSA polymer dispersions are advanced perfluorosulfonic acid/PTFE copolymer systems in the protonated (H⁺) form, suspended in water or alcohol-based solvents. These dispersions are chemically stabilized and available in multiple equivalent weights (EW) and polymer concentrations, designed for casting thin films, coating catalyst layers, and enhancing ionic conductivity in a wide range of electrochemical devices.

⚖ What Is Equivalent Weight (EW)?

Equivalent Weight (EW) refers to the weight of dry polymer (in grams) per mole of sulfonic acid (-SO₃H) groups. It directly affects proton conductivity, mechanical properties, and water uptake.

EW Value

Description


EW 1000	Higher acid group density → higher proton conductivity, softer membrane, higher swelling
EW 1100	Lower acid group density → better chemical/mechanical stability, lower water uptake
SCI Materials Hub ● www.scimaterials.cn

🔍 Key Differences: EW 1000 vs EW 1100

Property

EW 1000

EW 1100


Proton Conductivity	Higher	Moderate
Water Uptake	Higher (more swelling)	Lower (more stable dimensionally)
Mechanical Strength	Lower under high humidity	Better stiffness and durability
Chemical Stability	Slightly lower	Higher (especially in harsh media)
Flexibility	Softer, more elastic	Rigid and form-stable
Best Use Case	Catalyst ink, humid environments	Electrolyzers, sensors, robust membranes

📌 Nafion® PFSA Dispersion Composition and Performance (by Model)

Property

D-520 / D-521

D-2020 / D-2021


Polymer Content (wt%)	5.0 – 5.4	20.0 – 22.0
Water Content (wt%)	45 ± 3	34 ± 2
VOC Content (wt%)	50 ± 3	46 ± 2
1-Propanol Content (wt%)	48 ± 3	44 ± 2
Ethanol Content (wt%)	<4	<2
Mixed Ethers and Other VOCs (wt%)	<1	<1
Specific Gravity	0.92 – 0.94	1.01 – 1.03
Available Acid Capacity (meq/g)	>1.00 / >0.92	>1.00 / >0.92
Total Acid Capacity (meq/g)	1.03 – 1.12 / 0.95 – 1.03	1.03 – 1.12 / 0.95 – 1.03
Viscosity (cP @ 25°C, 40 sec⁻¹)	10 – 40	50 – 500

Note: 1 cP = 1 mPa·s. Slight variations exist between paired models (e.g., D-520 vs D-521) in acid capacity and formulation.

🧪 Application Areas

Application

Recommended EW

Suggested Models

Remarks


PEM Fuel Cells	EW 1000	D520 / D2020	Higher proton transport, ideal for catalyst ink & membrane casting
Electrolyzers	EW 1100	D521 / D2021	Excellent durability in strong acid/alkaline media
Ion Exchange Membranes	EW 1100	D521 / D2021	Better dimensional stability
Sensors & Microelectronics	EW 1100	D521 / D2021	Low swelling, better resolution in patterned films
Flow Batteries / Supercaps	EW 1000	D520 / D2020	Maximize ionic exchange capacity
Composite Membrane R&D	Both	All models	Select based on polymer ratio, viscosity, and substrate compatibility

📦 Packaging & Storage

Packaging Options: 1ml/bottle - 20L/bottle
Storage Conditions:
- Temperature: 0°C to 32°C (Do NOT freeze)
- Container: Glass, plastic, or stainless steel only
- Store in dry, shaded, temperature-controlled environment
Use: Stir well before use

⚠ Safety & Handling

Ensure adequate ventilation during high-temperature processing
Flammable components (propanol/ethanol) require grounded equipment to avoid static ignition
Wear gloves and eye protection
Follow DuPont Material Safety Data Sheets and safe handling guides

❗ Not for use in permanent human implantation. For other medical uses, refer to DuPont Medical Caution Statement H-50102.

📞 Contact Information

📞 Tel: +86 153-5789-9751
🌐 contact@scimaterials.cn