Diamond, Dermot

Ziółkowski, Bartosz

English

Irish Universities

Magnetic ionogels for fluid handling in microfluidic devices

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UNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE Magnetic ionogels for fluid handling in microfluidic devicesBartosz Ziółkowski13.06.2012Montecatini, ItalyUNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE Outline1. The need for stimuli responsive materials in microfluidics2. Ionogels3. Magnetic ionogels4. Future work5. ConclusionsPage 2 of  22UNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE • Autonomous sensor platforms for water quality are available• High cost, high maintenance, high power usage• Evolutionary engineering approach• Revolutionary materials reserach1. The need for stimuli responsive materials in microfluidicsPage 3 of  22UNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE What are ILs?:- Organic salts- Negligible vapour pressure- High thermal stability- Tunable properties- Some are liquid at room temperature- Some are liquid at room temperaturePage 4 of  22SO3[P6,6,6,14][dbsa][P6,6,6,14][Cl] [P6,6,6,14][DCA][P6,6,6,14][Tos]SO3[P1,4,4,4][Tos]UNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE Recipe for ionogel:1 mole of N-isopropylacrylamide0.05 mole of N,N’-bisacrylamide0.02 mole of 2,2’-dimethoxyphenylacetophenoneStir together with ionic liquid and expose to UV light for 30 minPage 5 of  222. IonogelsDryingSoaking (H2O)12mm15mmH2COHNCH3CH3CH3OOCH3OSample abbreviationIL(1.2 mL)NIPAM [mmol]MBIS[mmol]DMPA[mmol]P-Cl [P6,6,6,14][Cl] 3.53 - 0.07xP-Cl [P6,6,6,14][Cl] 3.53 0.18 0.07P-DCA [P6,6,6,14][DCA] 3.53 - 0.07xP-DCA [P6,6,6,14][DCA] 3.53 0.18 0.07P-Tos [P6,6,6,14][Tos] 3.53 - 0.07xP-Tos [P6,6,6,14][Tos] 3.53 0.18 0.07Pi-Tos [P1,4,4,4][Tos] 3.53 - 0.07xPi-Tos [P1,4,4,4][Tos] 3.53 0.18 0.07P-dbsa [P6,6,6,14][dbsa] 3.53 - 0.07xP-dbsa [P6,6,6,14][dbsa] 3.53 0.18 0.07UNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE Methods used:Page 6 of  22UV- curing rheometry Custom made DSC chamber and UV-LED array2. IonogelsUNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE 3. Magnetic ionogels:OR + OR(3-mercaptopropyl)trimethoxysilaneAllyltrimethoxysilaneFe3O4Fe3O4SiO2Fe3O4SiO2Particle preparationPage 12 of  22UNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE Fe3O4Fe3O4Fe3O4Fe3O4Fe3O4Fe3O4Bare particlesVSCoated particlespNIPAMgel matrixFe3O4Fe3O4Fe3O4Page 13 of  223. Magnetic ionogels:Particle preparationUNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE 3. Magnetic ionogels:Table 1. Dynamic light scattering analysis of functionalised nanoparticles. Their sizes and size distributions.MPTMS@F3O4 ATMS@Fe3O4DLS intensity peak [nm]261 172PDI [nm] 108 70TEM picture of the magnetic nanoparticles coated with MPTMS (left) & ATMS (right)Left: bare Fe3O4 in acetone Right: MPTMS coated Fe3O4 in acetonePage 14 of  22Particle preparationUNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE Left: bare Fe3O4 Middle: MPTMS coated Fe3O4 Right: ATMS coated Fe3O4(20%wt in all)3. Magnetic ionogels: Analysis of ionogels[P6,6,6,14][DCA] - pNIPAM ionogels polymerised with: Page 15 of  22UNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE [P6,6,6,14][DCA] - pNIPAM ionogel polymerised with bare Fe3O4Left: 25%Fe, 14%P Right: 1%Fe, 27%PBare particles phase-separate in the final materialPage 17 of  223. Magnetic ionogels: Analysis of ionogelsUNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE [P6,6,6,14][DCA] - pNIPAM ionogel polymerised with ATMS coated Fe3O4Left: 25%Fe, 14%P Right: 36%Fe, 6%PCoated particles do not phase separatePage 18 of  223. Magnetic ionogels: Analysis of ionogelsUNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE Page 19 of  223. Magnetic ionogels: ActuationUNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE • Spectroscopic analysis of IL-polymer and IL-monomer interactions•Optimisation of the organosilicon coating process of magnetite• Magnetic analysis of ionogels to determine their susceptibility to magnetic fields• Integrating this composite material into microfluidic manifolds and demonstrating a working valve and/or a working pump• Oscillating magnetic field actuation• Permanent  magnet actuation4. Future workPage 20 of  22UNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE 5. ConclusionsStimulus responsive materials can revolutionise autonomous sensor platformsIonogels – functional polymeric sponges filled with a non-volatile ILILs significantly impact the ionogel’s curing speed and stiffnessMagnetic particles provide an attractive, non-invasive actuation methodMagnetic nanoparticles can be coated with polymer linker organosilicon groups- Increased ionogel durability- Increased compatibility between the polymer and the particles- Reversible bending in non-uniform magnetic fields achievedPage 21 of  22UNIVERSITY COLLEGE DUBLIN    DUBLIN CITY UNIVERSITY    TYNDALL NATIONAL INSTITUTE Page 22 of  22AcknowledgementsDr. Kevin Fraser Dr. Robert Byrne Dr. Fernando Benito-LopezProf. Dermot Diamond Katrin BleekDr. Christina Günter Prof. Andreas Taubert • German Research Council DFG grant TA571/9-1• FP7 ATWARM grant (Marie Curie ITN, No. 238273).

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Magnetic ionogels for fluid handling in microfluidic devices

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