10.1021/acsmacrolett.5b00422.s001 Jun Yang Jun Yang Xueming Zhang Xueming Zhang Mingguo Ma Mingguo Ma Feng Xu Feng Xu Modulation of Assembly and Dynamics in Colloidal Hydrogels via Ionic Bridge from Cellulose Nanofibrils and Poly(ethylene glycol) American Chemical Society 2015 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 2015-08-18 00:00:00 Journal contribution 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.