Carbon Dioxide‐Switchable Chitosan/Polymer Composite Nanogels-He Naipu

Carbon dioxide (CO₂)‐switchable composite nanogels consisting of biopolymer chitosan and synthetic polymer poly [N‐(3‐(dimethylamino) propyl) methacrylamide] are fabricated by soap‐free emulsion polymerization. Introduction of chitosan in nanogels remarkably enhances their CO₂ sensitivity. Purging with CO₂, the nanogel latex becomes clear gradually from the original creamy white. While purging with N₂, the nanogel solution returns to the original latex state.

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