66. [Polymer] Salt-inactive hydrophobic association hydrogels with fatigue resistant and self-healing properties
writer：Jiajun Xu, Xiuyan Ren, Guanghui Gao
keywords：Hydrophobic association hydrogel Anionic surfactant Amphoteric surfactant Fatigue resistant Self-healing
source：期刊
Issue time：2018年
Traditional hydrophobic association (HA) hydrogels can obtain excellent mechanical properties in the
presence of anionic surfactants. However, such surfactants are sensitive to salt solutions, resulting in
large fluctuation of mechanical properties for hydrogels. Here, a combined surfactant consisting of
anionic surfactants (sodium dodecyl sulfate, SDS) and amphoteric surfactants (dodecyl dimethyl betaine,
BS-12) was successfully introduced into HA hydrogels as stable physical crosslinking points. The resulting
SDS/BS-12-HA hydrogels exhibited high tensile stress up to about 700 kPa. Moreover, the hydrogels
demonstrated salt-inactive, self-healing and fatigue resistance properties owing to their unique dynamic
and reversible physical crosslinking structure. Therefore, it''''s envisioned that this work may open a new
method to develop a soft salt-inactive material with stable and excellent mechanical properties for
extending the application range of hydrogels.