Self-Healing and Multistimuli-Responsive Hydrogels Formed via a Cooperation Strategy and Their Application in Detecting Biogenic Amines.
Self-Healing and Multistimuli-Responsive Hydrogels Formed via a Cooperation Strategy and Their Application in Detecting Biogenic Amines.
复制标题
DOI：
10.1021/acsami.8b09534
复制
发表时间：
2018-07
影响因子：
9.5
通讯作者：
Liuyan Tang;Shanshan Liao;Jinqing Qu
中科院分区：
文献类型：
--
作者：
Liuyan Tang;Shanshan Liao;Jinqing Qu
本文报道了一种通过金属配体配位作用和疏水作用协同交联的新型超分子水凝胶平台。合成了水杨醛苯甲酰腙封端的聚乙二醇（2SBH-PEG），并在水溶液中形成小胶束。Ni 2+的加入使低分子量的2SBH-PEG通过金属配体配位形成金属聚合物，并导致胶束聚集，由于疏水相互作用的增强而导致凝胶化。形成的水凝胶，Ni-PEGel，表现出快速的自我修复能力和可逆的pH响应性。由于其含有金属配位键，对强竞争配体如乙二胺四乙酸（EDTA）和吡啶也很敏感。此外，当暴露于生物胺（BA）蒸气时，Ni-PEGel显示出比色变化。Ni-PEGel对BA的显色使其成为监测食品腐败的良好候选者。
We reported here a new platform of supramolecular hydrogels cross-linked by the cooperation of metal-ligand coordination and hydrophobic interaction. A salicylaldehyde benzoyl hydrazone-terminal poly(ethylene glycol) (2SBH-PEG) was synthesized and formed small micelles in an aqueous environment. Addition of Ni2+ connected the low-molecular-weight 2SBH-PEG into a metallopolymer via metal-ligand coordination and led to micelle aggregation, resulting in gelation due to the enhancement of hydrophobic interaction. The forming hydrogel, Ni-PEGel, exhibited rapid self-healing ability and reversible pH-responsive property. Because of the containing metal coordination bond, it was also sensitive to the strong competing ligands, such as ethylenediaminetetraacetic acid (EDTA) and pyridine. In addition, Ni-PEGel showed colorimetric changes when exposed to biogenic amine (BA) vapor. The color development of Ni-PEGel toward BAs makes it a good candidate in monitoring food spoilage.