Fish-inspired anti-icing hydrogel sensors with low-temperature adhesion and toughness,Journal of Materials Chemistry A

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Fish-inspired anti-icing hydrogel sensors with low-temperature adhesion and toughness
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-04-20 , DOI: 10.1039/d0ta02370a
Jiajun Xu _{1,

2,

3,

4,

5} , Rining Jing _{1,

2,

3,

4,

5} , Xiuyan Ren _{1,

2,

3,

4,

5} , Guanghui Gao _{1,

2,

3,

4,

5}

Affiliation

Breaking through the conventional way of conferring anti-icing ability on hydrogels with addition of organic solvents or inorganic salts, here a novel anti-icing hydrogel with toughness, adhesiveness and high transparency was successfully fabricated by introducing antifreeze protein (AFPS, inspired by fish) into a chemical crosslinking network copolymerized with acrylamide and 2-acrylamide-2-methylpropanesulfonic acid. The hydrogel exhibited surprising stretchability (up to 2400% tensile strain), high transparency (over 90% transmittance) and outstanding reversible adhesive performance bonding to different materials and even human skin. Meanwhile, the inhibition of ice crystal growth based on AFPS molecules also conferred anti-icing ability on the hydrogels, so that the toughness and adhesiveness of the hydrogels remained stable at −10 °C. Additionally, the existence of sulfonic groups also endowed the hydrogels with deformation sensitivity to act as strain or pressure sensors to accurately monitor human motions and even subtle physiological signals. Therefore, the novel anti-icing strategy would provide new insight for a new generation of hydrogel sensors.

中文翻译：

以鱼为灵感的防冰水凝胶传感器，具有低温附着力和韧性

突破了通过添加有机溶剂或无机盐赋予水凝胶防冰能力的常规方法，在此通过引入防冻蛋白（AFPS，受鱼类启发）成功制备了具有韧性，粘性和高透明度的新型防冰水凝胶。形成与丙烯酰胺和2-丙烯酰胺-2-甲基丙烷磺酸共聚的化学交联网络。水凝胶表现出令人惊讶的可拉伸性（高达2400％的拉伸应变），高透明度（超过90％的透射率）以及出色的可逆粘合性能，可粘合到不同的材料甚至人类皮肤上。同时，基于AFPS分子的冰晶生长的抑制还赋予水凝胶抗冰能力，使得水凝胶的韧性和粘附性在-10℃下保持稳定。此外，磺酸基团的存在还使水凝胶具有变形敏感性，可以用作应变或压力传感器，以准确监测人体运动甚至微妙的生理信号。因此，新颖的防冰策略将为新一代水凝胶传感器提供新的见解。

更新日期：2020-04-20

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