OMNIPHOBIA AND ANALYTICAL CHALLENGES OF PFAS IN POLYMERS

Pallab Mandal*, Priyabrata Pattnaik, Prasenjit Swain

The unique fluid – repellent properties of modern synthetic polymers owe their existence to the physical phenomenon of omniphobicity-the simultaneous rejection of both aqueous and organic fluid phases. Per-and polyfluoroalkyl substances (PFAS) represents the chemical zenith of this attribute. Due to the extreme electronegativity and compact atomic radius of fluorine, fluorinated polymer matrices exhibit ultra-low surface free energy, exceptional thermal endurance, and profound chemical inertness. These characteristics make fluoropolymers irreplaceable across industrial processing equipment, specialized analytical tubing, and implantable biomedical devices. The very physical manifestation that makes per-and polyfluoroalkyl substances (PFAS) indispensable in polymer engineering-their profound omniphobicity-creates a severe analytical paradox during liquid chromatography-tandem mass spectrometry (LC-MS/MS) determination. The ultra-low surface free energy, amphiphilic partition coefficients, pervasive environmental presence, and chemical resistance of PFAS introduce severe hurdles throughout sample solubilisation, solid-phase extraction, fluidic transport, ionization, and mass filtering. This treatise explores the critical analytical vulnerabilities encountered when extracting and quantifying trace fluorochemicals from complex polymeric architectures under the thematic lens of omniphobic surface interactions. This paper explores the underlying molecular architecture of PFAS-driven omniphobicity, details its critical role in bio-interface engineering and leachable management, and evaluates the material science hurdles currently facing non-fluorinated alternatives.