Fluorinated and Fluoropolymer-Derived Photopolymers for Vat Photopolymerisation: Chemical Identity, Surface Energy, Optical-Cure Trade-Offs, Chemical Resistance, PFAS Boundaries and Qualification

Fluorinated materials offer combinations of low surface energy, solvent resistance, optical transparency, dielectric response and low friction that are attractive for microfluidics, electronics and demanding interfaces. Their established bulk-processing routes are often incompatible with vat photopolymerisation, so light-based fabrication has followed several chemically distinct strategies: direct curing of perfluoropolyether methacrylates, two-photon structuring of PFPE photoresists, dispersion and subsequent sintering of PTFE particles, vat printing of elastic fluorinated networks, post-print fluoroalkyl surface modification, photoreactive modification of existing fluoropolymers and recyclable thiol–ene fluorinated photoresists. Primary studies demonstrate viable structures and devices, but no route transfers the complete property set of PTFE or another reference fluoropolymer automatically. Optical clarity at one wavelength range does not establish cure-depth stability; a high water-contact angle does not establish surface durability or solvent resistance; immersion survival does not establish environmental-stress-crack resistance; and fluorine content does not define PFAS regulatory treatment by itself. Under the OECD 2021 structural terminology, many fluorinated monomers and polymers can fall within the broad PFAS universe, yet that classification alone does not communicate hazard, exposure, use-specific regulation or product composition. Qualification must therefore identify the fluorinated moiety and its location in the load-bearing network, control the printed state, separate surface and bulk measurements, use exact liquid and stress conditions, assess extractables and degradation products, and document fluorine mass flow at end of life. This paper supplies that framework without granting regulatory compliance, intended-use approval or chemical equivalence to a conventional fluoropolymer.

3Dresyns Engineering Review ER-104, version 0.2. Provider-neutral technical review. The deposited PDF is controlled by its exact SHA-256 in the release manifest.