Rational design of high-performance soluble intrinsic black polyimide with full absorption of visible light

An Intrinsic Photothermal Supramolecular Hydrogel with Robust Mechanical Strength and NIR‐Responsive Shape Memory

“…As depicted in Figure S2 (Supporting Information), the hydrogel color transitioned from light yellow to dark black with an escalating BQDO content, potentially resulting in enhanced photothermal efficiency. [32] The presence of three types of noncovalent interactions, including robust hydrogen bonding interactions among IU moieties, weak hydrogen bonding interactions involving carbamate groups, and 𝜋-𝜋 stacking (Figure 1b), enabled the formed hydrogels with promising mechanical properties, and a strip of the hydrogel (40 mm × 4 mm × 0.3 mm) could successfully lift 1 kg weight without fracture (Figure 1c). Moreover, owing to the existence of BQDO, the temperature of the hydrogel could be rapidly increased by around 30 °C upon the irradiation of NIR for ≈1.5 min (Figure 1d).…”