The perylene bisimide derivative Paliogen Black (P-black) is proposed as a new chromogenic probe that shows visible (vis) and near-infrared (NIR) responses after mechanical solicitations of host linear low-density polyethylene (LLDPE) films. P-black is reported to display strong absorption in the vis spectrum and unusual reflective and cooling features in the NIR region. Uniaxial deformation of the 2.5, 5, and 10 wt% P-black/LLDPE films yields a dichroic absorption under polarized light with color variations attributed by the computational analysis to the distinct anisotropic behavior of the transition dipole moments of P-black chromophores. When LLDPE films are deformed, P-black aggregates reduce their size from ≈30–40 µm to ≈5–10 µm that, in turn, causes reflectivity losses of about 30–40% at the maximum elongation. This gives rise to warming of 5–6 °C of the locally oriented film placed in contact with a black substrate under the illumination with an IR lamp for 5 s. These features combined with the high sensitivity of the vis-NIR response toward mechanical solicitations render P-black as a new solution to detect uniaxial deformations of plastic films through both optical and thermal outputs.

Mechanochromic LLDPE Films Doped with NIR Reflective Paliogen Black / Micheletti, C.; Minei, P.; Carlotti, M.; Mattoli, V.; Muniz Miranda, F.; Perfetto, A.; Ciofini, I.; Adamo, C.; Ruggeri, Giacomo; Pucci, Andrea. - In: MACROMOLECULAR RAPID COMMUNICATIONS. - ISSN 1022-1336. - 42:1(2021), pp. e2000426-e2000434. [10.1002/marc.202000426]

Mechanochromic LLDPE Films Doped with NIR Reflective Paliogen Black

Muniz Miranda F.;
2021

Abstract

The perylene bisimide derivative Paliogen Black (P-black) is proposed as a new chromogenic probe that shows visible (vis) and near-infrared (NIR) responses after mechanical solicitations of host linear low-density polyethylene (LLDPE) films. P-black is reported to display strong absorption in the vis spectrum and unusual reflective and cooling features in the NIR region. Uniaxial deformation of the 2.5, 5, and 10 wt% P-black/LLDPE films yields a dichroic absorption under polarized light with color variations attributed by the computational analysis to the distinct anisotropic behavior of the transition dipole moments of P-black chromophores. When LLDPE films are deformed, P-black aggregates reduce their size from ≈30–40 µm to ≈5–10 µm that, in turn, causes reflectivity losses of about 30–40% at the maximum elongation. This gives rise to warming of 5–6 °C of the locally oriented film placed in contact with a black substrate under the illumination with an IR lamp for 5 s. These features combined with the high sensitivity of the vis-NIR response toward mechanical solicitations render P-black as a new solution to detect uniaxial deformations of plastic films through both optical and thermal outputs.
2021
42
1
e2000426
e2000434
Mechanochromic LLDPE Films Doped with NIR Reflective Paliogen Black / Micheletti, C.; Minei, P.; Carlotti, M.; Mattoli, V.; Muniz Miranda, F.; Perfetto, A.; Ciofini, I.; Adamo, C.; Ruggeri, Giacomo; Pucci, Andrea. - In: MACROMOLECULAR RAPID COMMUNICATIONS. - ISSN 1022-1336. - 42:1(2021), pp. e2000426-e2000434. [10.1002/marc.202000426]
Micheletti, C.; Minei, P.; Carlotti, M.; Mattoli, V.; Muniz Miranda, F.; Perfetto, A.; Ciofini, I.; Adamo, C.; Ruggeri, Giacomo; Pucci, Andrea...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1258579
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