writer：He Xiao, Chunxin Ma, Xiaoxia Le, Wei Lu, Li Wang, Patrick Theato, Tuoping Hu, Jiawei Zhang,* and Ta
keywords：multiple shape memory; chitosan; microcrystal; chain entanglement; hydrogel
source：期刊
specific source：Polymers, 2017, 9, 138
Issue time：2017年

A novel multiple shape memory hydrogel is fabricated based on two reversible physical interactions. The multiple shape memory property is endowed by a simple treatment of soaking in
NaOH or NaCl solutions to form chitosan microcrystal or chain-entanglement crosslinks as temporary junctions.