Fabrication of photochromic hydrogels using an interpenetrating chitosan network |
| |
Authors: | Geun‐Chang Ryu Ho‐Joong Kim |
| |
Affiliation: | 1. Center for Genome Engineering, Institute for Basic Science, Seoul, Korea;2. Department of Chemistry, Chosun University, Gwangju, Korea |
| |
Abstract: | The synthesis of a novel interpenetrating chitosan network post‐modified with spiropyran (SP) derivatives has been used to develop photochromic hydrogels. We have synthesized succinyl chitosan polymers containing a considerable number of both amines and carboxylic groups. Their intra/inter molecular amide coupling reactions and postmodification with SP derivatives resulted in the photochromic hydrogels functionalized with chitosan‐based interpenetrating polymer network structures. In this hydrogel system, SPs undergo reversible photoresponsive structural switching between a ring‐closed colorless SP form and a ring‐opened purple merocyanine form under specific light‐irradiation conditions. Notably, the photo‐mediated wettabilities and color intensities of the hydrogels increase by the increment in the molecular weight of SP‐functionalized chitosans. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 45120. |
| |
Keywords: | addition polymerization functionalization of polymers hydrophilic polymers monolayers and polymer brushes stimuli‐sensitive polymers |
|
|