Fig. 3: Spatially confined phenolic groups reduce water uptake.
From: Ultrastrong underwater adhesion on diverse substrates using non-canonical phenolic groups
a Comparison between water uptake of P(2HS26%-co-S74%), P(2HS11%-co-S89%) and P(5HS11%-co-S89%) via QCM. The results represent the mean ± s.d. (n = 3). b Surface contact angle images of fractured aluminum surfaces containing P(5HS11%-co-S89%) and P(2HS26%-co-S74%) in air and in water. c SEM images of fractured aluminum surfaces containing P(5HS11%-co-S89%) (left, red) and P(2HS26%-co-S74%) (right, yellow). d Proposed mechanism of water-shielding at the interface between the substrate and polymers. e XPS spectra of fractured aluminum surfaces containing P(4HS9%-co-S91%) and P(5HS11%-co-S89%).
