Technology — Sepion

Why Sepion Works Differently

Redefining molecular transport across every industry

Standard polymers are flexible: when coated from solution, their chains pack randomly and collapse into dense, amorphous films.

Sepion’s polymers are constructed with a rigid and angular backbone, so they physically cannot pack densely. The result is a self-assembled porous film with nanoscale size selectivity, made using conventional polymer coating equipment.

Standard polymer vs Sepion polymer — single chain, solution coating, and final film morphology side by side

0.5–4 nm Pores
Tunable pore size for molecular and ionic selectivity.
Hydrocarbon Feedstocks
Built from simple inputs for scalable polymer production.
Solvent & Electrolyte Compatibility
Stable across aggressive liquid chemistries.
>300°C Stability
Thermal durability for demanding operating environments.
No Glass Transition
A broad processing window without conventional softening limits.

How It Works

At its core, Sepion’s platform reshapes how ions and molecules move through a membrane.

Sepion’s platform delivers tunable, precise separations at the molecular scale across applications.

About Us

1
Molecular Architecture
The polymer structure is engineered to create precise nanoscale pathways.
2
Controlled Transport
These pathways allow selected species to pass efficiently while blocking unwanted species.
3
Better System Performance
The result is improved system-level efficiency and durability.