Fig. 3: The analysis of the mechanism of water absorption-induced expansion in HPH.
From: Bioinspired hydrophobic pseudo-hydrogel for programmable shape-morphing
a The expansion ratio versu time of HPH with different pore sizes. Results are expressed as the mean ± SD for independent replicates (n = 3). b The optical image of HPH with different pore sizes before and after immersed in water. c Diagram of 2D ordered porous media with triangular arrangement of holes. d Porous media are filled with various phases of fluid. e Theoretical prediction results of between pore load modulus versus pore sizes. f Theoretical prediction results of pore equivalent Young’s modulus versus pore sizes.
