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Modular Synthesis of Thermosensitive P(NIPAAm‐ co ‐HEMA)/ β ‐CD Based Hydrogels via Click Chemistry
Author(s) -
Xu XiaoDing,
Chen ChangSheng,
Lu Bo,
Wang ZongChun,
Cheng SiXue,
Zhang XianZheng,
Zhuo RenXi
Publication year - 2009
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200800671
Subject(s) - self healing hydrogels , click chemistry , swelling , polymer , alkyne , azide , polymer chemistry , cycloaddition , kinetics , chemistry , chemical engineering , materials science , catalysis , organic chemistry , composite material , physics , quantum mechanics , engineering
Two kinds of representative polymers, poly( N ‐isopropylacrylamide) (PNIPAAm) and β ‐cyclodextrin ( β ‐CD) were selected and modified with azide and alkyne fucntional groups, respectively. When the solutions of these two modified polymers were mixed together, a cross‐linking reaction, a type of Huisgen's 1,3‐dipolar azide‐alkyne cycloaddition, occurred in the presence of Cu(I) catalyst. The strategy described here provides several advantages for the hydrogel formation including mild reaction conditions and controllable gelation rate. The resulted hydrogels were studied in terms of scanning electric microscopy (SEM), equilibrium swelling ratio and swelling/shrinking kinetics. The data obtained demonstrated the hydrogels had a porous structure as well as favorable thermosensitivity.