1 / 14

BZ and Gels

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.

gwylan
Télécharger la présentation

BZ and Gels

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. BZ and Gels Ye Zhang Bing Xu’s Group

  2. Videos of Self-oscillating Gels Self-Walking Gel

  3. Make Gel Oscillate in BZ BZ components : Oxidant Catalyst Acid H2O Malonic Acid (MA) BrO3- Ru(bpy)3 HNO3/H2SO4 Build in Self-Oscillating Gel Gel BZ oscillation

  4. Gel Types for Self-Oscillating Gel Crosslinked Thermo-sensitive Uncrosslinked Polymeric Hydrogel Nonthermo-sensitive Gel Supramolecular Hydrogel

  5. CrosslinkedThermosensitive Polymeric Self-oscillating Gels NIPAm-co-Ru(bpy)3 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).

  6. Development of Self-oscillating Gels

  7. UncrosslinkedThermosensitive Polymeric Gels Acid Free Oxidant Free poly(NIPAm-co-Ru(bpy)y-co-MAPTAC) poly(NIPAm-co-Ru(bpy)y-co-AMPS) Acid and Oxidant Free poly(NIPAm-co-Ru(bpy)y-co-AMPS-co-MAPTAC)

  8. CrosslinkedNonthermosensitive Polymeric Gels 0.5Hz 50 oC <0.2% volume change 0.03Hz 20 oC <0.5%volume change 0.003Hz 20 oC 10-20% volume change Poly(VP-co-Ru(bpy)3) NIPAm-co-Ru(bpy)3 poly-vinylpyrrolidone (PVP)

  9. 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

  10. Thermo-Sensitive Polymer Based Self-Oscillatory Materials

  11. Post Self-Assembly Crosslinkingof SupramolecularNanofbers 1 2

  12. SupramolecularHydrogel Condition Hydrogelator 4 mg Water 450 μL pH 7-8 Ru complex 0.5 mg 60X

More Related