배터리용 PET 파우치 인-질소계 난연 기능성 모노머

[2025 카모페어]

In this study, photocurable monomers containing phosphorus-nitrogen groups were employed alongside UV curing technology to develop flame-retardant (FR) coatings for pouch-type battery cells made from polyethylene terephthalate (PET). The three different monomers synthesized for this purpose included a phosphorus-containing urethane acrylate monomer (DUPPO), a nitrogen-phosphorus-containing urethane acrylate monomer (DA-Pi-U), and a phosphazene-containing phenyl methacrylate crosslinker (CP-PMA). These monomers, known for their flame-retardant capabilities, were used in binary and ternary coating formulations that were effectively cured via a UV-curing process. The molecular architectures of the synthesized monomers and crosslinker were verified through 1H and 31P nuclear magnetic resonance (NMR) spectroscopy. The rheological curing behavior of the coating solutions was assessed using an oscillatory rheometer. In addition, the reactivity of the FR coating system was examined via Fourier transform infrared (FT-IR) spectroscopy. The thermal and flame-retardant characteristics of the FR coatings were confirmed through multiple analytical techniques, including thermogravimetric analysis (TGA), Raman spectroscopy, limiting oxygen index (LOI), and scanning electron microscopy (SEM). To assess the mechanical integrity of the flame-retardant UV-cured films, eval‎uations of surface hardness and scratch resistance were conducted using nano-indentation (NI) and nano-scratch tester (NST) and atomic force microscopy (AFM). The investigations indicated that the ternary FR coating system incorporating CP-PMA was particularly effective, providing enhanced thermal stability, flame retardancy, crosslinking density, mechanical robustness, and flexibility. This makes it suitable for application on PET pouches.

배터리용 PET 파우치 인-질소계 난연 기능성 모노머.pdf

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