PTFE Battery Separator Base Film 0.22μm, 47 mm Diameter, 100 Sheets

This hydrophilic PTFE membrane requires pre-wetting with ethanol or isopropanol before aqueous filtration to overcome its inherent hydrophobicity. The material exhibits broad chemical resistance across a pH range of 1-14, including strong acids and alkalis, but slight lot-to-lot variations may affect performance.

• Wettability Requirement: Hydrophobic PTFE must be pre-wetted with ethanol or isopropanol prior to use in aqueous filtration applications.
• Chemical Compatibility: The membrane is resistant to strong acids, strong alkalis, and many organic solvents across a pH range of 1-14.
• Lot Variability: Slight variations between production lots are possible, but guaranteed performance indicators comply with product specifications.

This procedure describes the pre-wetting and handling steps required to use the hydrophilic PTFE membrane for aqueous filtration. Proper pre-wetting ensures the membrane becomes fully wettable and functional for liquid processing.

Required Equipment: Ethanol or isopropanol, Filtration apparatus

1. Pre-wet the membrane
   Immerse the PTFE membrane in ethanol or isopropanol until the material becomes fully translucent and wettable.
2. Rinse with water
   Rinse the pre-wetted membrane with deionized water to remove residual alcohol before introducing the aqueous sample.
3. Load into filtration apparatus
   Place the conditioned membrane onto the filter support of the filtration apparatus, ensuring a proper seal to prevent bypass.
4. Begin filtration
   Apply the aqueous sample to the membrane and initiate filtration under the desired pressure or vacuum conditions.

This 50 mm diameter, 0.22 μm hydrophilic PTFE separator membrane offers broad chemical resistance (pH 1-14) and compatibility with organic solvents, making it suitable for battery separator and filtration applications, though it requires pre-wetting with ethanol or isopropanol for aqueous use.

Positive

• Broad chemical and pH resistance: The expanded PTFE membrane withstands strong acids, strong alkalis, and many organic solvents across a pH range of 1-14, enabling use in aggressive chemical environments common in battery and filtration research.
• Hydrophilic pre-wetted format: Supplied as a hydrophilic membrane, it is ready for aqueous filtration without additional wetting, reducing preparation time and ensuring consistent performance in aqueous-based separator applications.

Trade-offs

• Pre-wetting required for aqueous use: Despite the hydrophilic designation, the handling note specifies that hydrophobic PTFE must be pre-wetted with ethanol or isopropanol before aqueous filtration, adding a preparation step and potential for user error.
• Lot-to-lot variation possible: The product note indicates slight variations may occur between production lots, which could affect reproducibility in sensitive experiments, though performance indicators are guaranteed to meet specifications.

Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.

To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.

Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).