RESEARCH / TESTING USE ONLY. NOT CERTIFIED OR APPROVED FOR CONSUMER OR REGULATED APPLICATIONS
This listing is for (1) composite cation exchange membrane sheet, letter size (11 in x 8.5 in). The membrane is a thick, PVC-based composite with fiberglass reinforcement. Due to the fiberglass mix, it is mostly rigid and typically measures ~0.5 to 3 mm thick (variation expected).
Cutting / handling
Edges should be cut carefully to prevent fraying. Use sharp, quality scissors/box cutter knife and handle the cut edge gently. Avoid tearing or aggressive bending.
Mounting / sealing options
Because the membrane is PVC-based, it can be mounted using methods and materials compatible with PVC, including:
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Bonding to a PVC frame using compatible adhesives/bonding methods (recommended “safe default” for most builds)
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Gasket + compression
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Hot glue, silicone, and other sealants can work, but use caution: ensure compatibility with your electrolyte and any acids/solvents in your system, and avoid overheating/deforming the membrane.
Operating envelope (experimental)
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Temperature: recommended below 60°C (PVC-based composite).
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pH / pressure: not rated / unknown. This membrane is sold strictly for experimental research, and the Buyer is responsible for determining compatibility and safe operating limits for their specific chemistry and setup.
Conditioning / first use
The membrane may require initial conditioning (“polarization”) to reach stable performance:
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Soak in your intended conductive solution prior to first use.
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Allow current to run through the membrane; in some cases, a higher-than-normal operating voltage may be used briefly to help polarize/condition (user discretion and responsibility, reduce voltage over time or use a fixed amperage power supply).
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Recommended current density: 50 to 200 mA/cm², depending on solution conductivity and cell design. Performance and optimal settings vary by electrolyte, geometry, temperature, and operating conditions.
Shipping / storage (IMPORTANT)
Membranes ship hydrated in a wet sealed bag. Keep sealed until ready to use. The membrane can be gently patted dry with a paper towel for handling and sealing, but:
DO NOT ALLOW THE MEMBRANE TO FULLY DRY. Full drying can permanently damage the membrane, causing shrinkage and cracking. Store sealed and hydrated when not in use. Avoid freezing.
Research disclaimer / liability notice
This membrane is provided as-is for research, development, educational, or industrial evaluation only. It is not certified, accredited, or approved for potable water, food contact, medical, life-safety, consumer, or regulatory-compliance applications. The Buyer is solely responsible for safe handling, installation, compatibility testing, operating parameters (including chemical exposure, temperature, pH, and pressure), and lawful use and disposal. No guarantees are made regarding performance, results, durability, or fitness for any particular purpose.
