Visually and Infrared Transparent Poly(oxalamide) Films with Mechanical Toughness AITranslate

Basic Information:

DOI：https://doi.org/10.1021/acsapm.2c00571

Chinese Library Classification Number:

Citation Information:

The growing maturity and sophistication of autonomous vehicles incorporate increasing numbers of sensors to produce multiple data streams detailing vehicle surroundings. As part of the continuous and reliable transmission of data, protection of lenses and windows for sensors from environmental damage is necessary across bands including visible (400–750 nm), near IR (0.75 to 1.5 μm), and thermal wavelengths (8–15 μm). Here, we report a cross-linked poly(oxalamide) based on aliphatic amine monomers and dioxalate species, resulting in transparency in both visible (400–750 nm) and multiple IR bands (0.75–1.5 μm, 3.5–5.5 μm, and 8–12 μm). Mechanical toughness (ε = ∼200%, σ = 35 MPa) and network resiliency toward fluids and thermal exposure are reflective of the cross-linked network and contribute to durability and the potential to protect brittle substrates. This was demonstrated by casting free-standing films bonded onto a germanium window using the identical poly(oxalamide) resin as an adhesive. Imaging through a thermal IR camera with the coated window before and after exposure to an abrasive sand stream showed the ability to protect the underlying substrate and maintain image quality while the unprotected window was severely degraded.