72. [Carbohydrate Polymers] Tough, adhesive and conductive polysaccharide hydrogels mediated by ferric solution
writer：Jiajun Xu, Rining Jin, Lijie Duan, Xiuyan Ren, Guanghui Gao
keywords：Hydrogel Polysaccharide Tough and adhesive Coordination interaction
source：期刊
Issue time：2019年
In general, chitosan should be dissolved in strong acidic media (such as acetic acid) before it could be applied as
hydrogels. However, it was found that chitosan could also be dissolved in the ferric solution to form ferricchitosan
complex via coordination interaction. Subsequently, the ferric-chitosan complex was successfully introduced
into the hydrogel system to obtain tough, adhesive and conductive chitosan-polyacrylamide double
network (CS-PAAm DN) hydrogels. Surprisingly, CS-PAAm DN hydrogel could repeatedly adhere to various solid
materials and biological tissues through physical interactions. The maximum peeling force was 256 N/m on the
aluminum surface. Moreover, the hydrogel exhibited adequate mechanical performance (135 kPa, 2332%). And
the introduction of ferric chloride could also endow the hydrogel with conductive performance. As a result, the
strategy based on tough, adhesive and conductive polysaccharide hydrogels mediated by ferric solution would
broaden the path to fabricate a new generation of soft materials for wide applications.