与快速的应答的形状记忆能力包含 hydrogels 的多巴胺被一个一个壶方法综合。hydrogel 的暂时的形状被在 Fe 3+ 离子和儿茶酚组之间复杂的 metal-ligand 的 tris 复杂的 crosslinking 在 NaOH 答案在 20 s 以内修理,当永久形状在变化之上在 60 s 以内在 HCl 答案完全被恢复从时对 tris 复杂单音建筑群。hydrogel 显示出唯一的自发的使活动行为。没有进一步的外部力量变丑,什么时候在 HCl 答案在第一形状恢复以后再在 NaOH 答案沉浸,能自发地卷。当在 NaOH 答案沉浸时,这可能被归因于胀大和另外的 tris 复杂的 crosslinking 形成的竞争结果。另外, hydrogels 也有合适的模量,延伸比率和张力的力量。如此的 hydrogel 为设计与自发的激活调制的软致动器和机器人提供新候选人材料。
The dopamine containing hydrogels with rapid responsive shape memory capability were synthesized by a one-pot method. The temporary shape of hydrogel was fixed within 20 s in Na OH solution by the tris-complex crosslinking of metalligand complex between Fe3+ ions and catechol groups, while the permanent shape was recovered completely in HCl solution within 60 s upon the change from tris-complex to mono-complex. The hydrogel showed unique spontaneous actuation behavior. It could curl spontaneously without further external force deformation when immersed in Na OH solution again after the first shape recovery in HCl solution. This might be attributed to the competitive result of swelling and additional tris-complex crosslinking formation when immersed in Na OH solution. In addition, the hydrogels also had proper modulus, elongation ratio and tensile strength. Such hydrogel provides a new candidate material for designing soft actuators and robots modulated with spontaneous actuating.