.png){kind=icon}
.png){kind=icon}
Return
Structurally Switchable Hydrogels with Multifunctions Enabled by Controlled Catenated Junctions
.png){kind=icon}
PRE
AI
DOI：10.1021/acs.macromol.3c01434.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
In the present work, the topological hydrogels are prepared through cross-linking Tetra-PEG chains using catenated junctions of bis-(phenanthroline) complexed by metal ions. The catenated junctions are either interlocked through metal-ligand coordination, unlocked through demetalation, or relocked through remetalation. Once unlocked, the cross-links become slidable, thereby leading to a reduction of the elasticity, and the degree of reduction depends on the detailed topological structure, particularly the number of network defects. The mechanical properties of the prepared Tetra-PEG can be tuned by changing either the species of the metal ions or the pH values. In comparison, for the linear PEG precursor, the gel-to-sol transition occurs upon demetalation that leads to the formation of linear chains (i.e., precursor chains connected by the catenated junctions). The paradigm described in this work offers a synthetic approach to the hydrogels with varied cross-links.
Keywords:
ETHOXYLATED URETHANE HEUR
HIGH-STRENGTH HYDROGEL
ASSOCIATING POLYMERS
RHEOLOGY
BEHAVIOR
GEL
Journal
IF:
5.2
Papers:
3.7W
Citations:
9.4W