Modulation of Assembly and Dynamics in Colloidal Hydrogels
via Ionic Bridge from Cellulose Nanofibrils and Poly(ethylene glycol)
Jun Yang
Xueming Zhang
Mingguo Ma
Feng Xu
10.1021/acsmacrolett.5b00422.s001
https://acs.figshare.com/articles/journal_contribution/Modulation_of_Assembly_and_Dynamics_in_Colloidal_Hydrogels_via_Ionic_Bridge_from_Cellulose_Nanofibrils_and_Poly_ethylene_glycol_/2140477
The biologically inspired dynamic
materials offer principles for
designing man-made systems by using assembly approach. In this work,
the hybrid hydrogels consist of cellulose nanofibrils (CNFs) that
combine a mechanically strong skeleton with flexible PEG chains. The
distinct gel state is observed at room temperature with <i>G</i>′ > <i>G</i>″ and an order of magnitude
higher <i>G</i>′ values from 0.08 to 0.93 kPa upon
increasing CNF
concentration from 0.2 to 2 wt % at constant 2 wt % PEG. Combined
with mechanically strong CNFs and dynamic ionic bridges through amine-terminated
tetra-arm PEG adsorption to TEMPO-oxidized colloidal nanofibrils surface,
the assembled colloidal hydrogels show high modulus, reversible gel–sol
transition, and rapid self-recovery properties. It is envisioned that
simply mixing hard CNF and soft polymeric matrix would lead to a facile
method to bridge reversible dynamic bonds in a cellulose-based hybrid
network and broad cellulose applications in the preparation of high
performance supramolecular systems.
2015-08-18 00:00:00
0.93 kPa
assembly approach
nanofibrils surface
PEG chains
hydrogels show
Cellulose Nanofibrils
materials offer principles
wt
cellulose applications
cellulose nanofibrils
gel state
Colloidal Hydrogels
Ionic Bridge
performance supramolecular systems
room temperature
CNF concentration