Cover Image, Volume 51, Issue 2


original image

A robust sequential interpenetrating network (SeqIPN) methodology is proposed on page 363 by Ting Yang, Michael Malkoch, and Anders Hult for the fabrication of polyethylene glycol (PEG) based IPN hydrogels. By employing the highly efficient and UV initiated thiol-ene coupling chemistry, a comprehensive library of hydrogels is produced covering a broad window of swelling and mechanical properties. As a result, PEG hydrogels can accurately be fine-tuned beyond the limited boundaries of traditional single network hydrogels.