期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 32, 页码 27365-27373出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b09534
关键词
hydrogels; metal-ligand coordination; hydrophobic interaction; self-healing multistimuli responsive; biogenic amines; food spoilage
资金
- Natural Science Foundation of Guangdong, China [2015A030313205]
- Science and Technology Program of Guangdong Province, China [2014B090903010, 2015A010105010, 2015B090925006, 2016B090930005, 2016B030302004]
We reported here a new platform of supra molecular 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-PEGeI, 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.
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