bz and gels
DESCRIPTION
BZ and Gels. Y e Zhang B ing Xu’s Group. Videos of Self-oscillating Gels. Self-Walking Gel. Make Gel Oscillate in BZ. BZ components :. Oxidant. Catalyst. Acid. H 2 O. Malonic Acid (MA). BrO 3 -. Ru(bpy) 3. HNO 3 /H 2 SO 4. Build in. Self-Oscillating Gel. Gel. BZ. - PowerPoint PPT PresentationTRANSCRIPT
BZ and GelsYe Zhang
Bing Xu’s Group
Self-Walking Gel
Videos of Self-oscillating Gels
Malonic Acid (MA)
BrO3- Ru(bpy)3 HNO3/H2SO4H2O
Oxidant Catalyst
Gel
Build in
oscillation
BZ
Acid
BZ components :
Make Gel Oscillate in BZ
Self-Oscillating Gel
Gel
Polymeric Hydrogel
Supramolecular Hydrogel
Thermo-sensitive
Nonthermo-sensitive
Crosslinked
Uncrosslinked
Gel Types for Self-Oscillating Gel
Equilibrium swelling ratio of (NIPAm-co-Ru(bpy)3) gel under different conditions of reduced Ru(II) state (in Ce(III) solution) and oxidized Ru(III) state (in Ce(IV) solution).
NIPAm-co-Ru(bpy)3
Crosslinked Thermosensitive Polymeric Self-oscillating Gels
Development of Self-oscillating Gels
poly(NIPAm-co-Ru(bpy)y-co-AMPS) poly(NIPAm-co-Ru(bpy)y-co-MAPTAC)
poly(NIPAm-co-Ru(bpy)y-co-AMPS-co-MAPTAC)
Uncrosslinked Thermosensitive Polymeric Gels
Acid Free
Oxidant Free
Acid and Oxidant Free
poly-vinylpyrrolidone (PVP)
0.5Hz 50 oC <0.2% volume change0.03Hz 20 oC <0.5%volume change
Crosslinked Nonthermosensitive Polymeric Gels
Poly(VP-co-Ru(bpy)3) NIPAm-co-Ru(bpy)3
0.003Hz 20 oC 10-20% volume change
Control of Oscillation Behavior
Size-chemical waves Vs. volume change
Concentration of MA-switch on/off oscillation
Temperature-Oscillation frequency
Light illumination-Oscillation frequency
Molecular structure of catalyst
Thermo-Sensitive Polymer Based Self-Oscillatory Materials
Post Self-Assembly Crosslinking of Supramolecular Nanofbers
1
2
ConditionHydrogelator 4 mgWater 450 μLpH 7-8Ru complex 0.5 mg
60X
Supramolecular Hydrogel