| 초록 |
A key requirement of the membranes of the polymersome nanoreactor is a tunable porosity that allows the transportation of reagents and products while retaining the catalysts within the compartment. Here, we report the stimuli-responsive route for controlling the permeability of the polymersomes. We self-assembled the binary blends of PEG-b-PS and PEG-b-PABB into polymersomes. Upon introduction of H2O2, the benzyl borate units in the PABB block are oxidized, resulting in the formation of water-soluble poly(acrylic acid) block. By controlling the composition of two block copolymers (BCPs), polymersomes exhibited size-selective permeability without losing the structural integrity. The phase-separation between the inert PS and the stimuli-responsive PABB blocks induced the size-selectivity. The tunable porosity was characterized by encapsulating the fluorescent dyes with different sizes. The size discrimination enabled the modular nanoreactor system to exhibit the tandem reaction. |
