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  • Mar
    1

    ChBE Seminar Series, Dr. Amanda Marciel

    McCormick-Chemical and Biological Engineering

    8:45 AM L361, Technological Institute

    EVENT DETAILS

    Amanda Marciel

    Title:
    Structure and Rheology of Polyelectrolyte Complex Coacervates

    Polyelectrolyte complexes are highly tunable materials that span from low-viscosity liquids (coacervates) to high-modulus solids with high water content, making them attractive as surface coating, membrane purification and bioadhesive materials. However, most of their properties and their effects with salt, pH, polymer ratio and temperature have only been qualitatively described. Here, we present a scattering investigation of the structure and chain conformations, and rheological properties of polyelectrolyte complex (PEC) coacervates comprising model polyelectrolytes. Systematic studies using small-angle X-ray scattering (SAXS) of the structure and chain behavior in liquid PEC coacervates revealed a physical description of these materials as strongly screened semidilute solutions of polyelectrolytes comprising oppositely charged chains. At the same time, solid PECs were found to be composed of hydrogen-bonding driven stiff ladder-like structures with large correlation lengths. While the liquid complexes behaved akin to semidilute polyelectrolyte solutions upon addition of salt, the solids were largely unaffected by it. Terminal relaxations of the chains in PEC coacervates were explored by rheology measurements. Excellent superposition of the dynamic moduli data was achieved by a time-salt superposition, although with the shift factors varying more strongly than previously reported with increasing salt concentration.

    Bio:

    Amanda Marciel is currently a postdoctoral fellow at the Institute for Molecular Engineering (IME) at The University of Chicago working with Professor Matthew Tirrell studying the physical properties of polyelectrolyte complexes. In 2015, Amanda completed her PhD with Professor Charles Schroeder at the University of Illinois at Urbana-Champaign where she developed a synthetic platform to precisely control polymer microstructure and implemented a microfluidic strategy to drive assembly of complex polymer architectures for biomedical and electronics applications.

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    TIME Thursday, March 1, 2018 at 8:45 AM - 10:00 AM

    LOCATION L361, Technological Institute    map it

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    CONTACT Cody Jarrett    cody.jarrett@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering

  • May
    1

    BTP Seminar Series: Jorge Vazquez Anderson, Boston Consulting Group

    McCormick-Chemical and Biological Engineering (ChBE)

    4:30 PM

    EVENT DETAILS

    TIME Wednesday, May 1, 2024 at 4:30 PM - 5:30 PM

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    CONTACT Will Chaussee    william.chaussee@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • May
    2

    ChBE Seminar Series: "Interfacial colloidal interactions, dynamics, and assembly: from biomembranes to ordered 2D materials" - Peter Beltramo, University of Massachusetts

    McCormick-Chemical and Biological Engineering (ChBE)

    9:30 AM LR4, Technological Institute

    EVENT DETAILS

    TIME Thursday, May 2, 2024 at 9:30 AM - 10:45 AM

    LOCATION LR4, Technological Institute    map it

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    CONTACT Olivia Wise    olivia.wise@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • May
    8

    Extending Care: A Conversation about Conservation and Futurity

    Block Museum of Art

    6:00 PM Block Museum of Art, Mary and Leigh

    EVENT DETAILSmore info

    TIME Wednesday, May 8, 2024 at 6:00 PM - 7:30 PM

    LOCATION Block Museum of Art, Mary and Leigh    map it

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    CONTACT Block Museum of Art    block-museum@northwestern.edu EMAIL

    CALENDAR Block Museum of Art

  • May
    9

    ChBE Seminar Series: Influence of visible photons on catalytic reactions at metal nanoparticle surfaces - Phillip Christopher, University of California, Santa Barbara

    McCormick-Chemical and Biological Engineering (ChBE)

    9:30 AM LR4, Technological Institute

    EVENT DETAILS

    TIME Thursday, May 9, 2024 at 9:30 AM - 10:45 AM

    LOCATION LR4, Technological Institute    map it

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    CONTACT Olivia Wise    olivia.wise@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • May
    16

    35th Annual Hugh M. Hulburt Memorial Lecture: "Adsorption Thermodynamics for Process Simulation" - Chau-Chyun Chen, Texas Tech University

    McCormick-Chemical and Biological Engineering (ChBE)

    9:30 AM LR4 (M113), Technological Institute

    EVENT DETAILS

    TIME Thursday, May 16, 2024 at 9:30 AM - 10:45 AM

    LOCATION LR4 (M113), Technological Institute    map it

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    CONTACT Jennifer Young    jennifer.young@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • May
    23

    ChBE Seminar Series: ARDEI Annual Lecture - "Restructuring the STEM Pipeline: Dismantling Stereotypes and Microaggressions in STEM to Build Networks of Belonging and Support" - Christine Reyna, DePaul University

    McCormick-Chemical and Biological Engineering (ChBE)

    9:30 AM LR4, Technological Institute

    EVENT DETAILS

    TIME Thursday, May 23, 2024 at 9:30 AM - 10:45 AM

    LOCATION LR4, Technological Institute    map it

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    CONTACT Olivia Wise    olivia.wise@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • May
    30

    ChBE Seminar Series: Ruihan Li and Kunhuan Liu, Student Seminars

    McCormick-Chemical and Biological Engineering (ChBE)

    9:30 AM LR4, Technological Institute

    EVENT DETAILS

    TIME Thursday, May 30, 2024 at 9:30 AM - 10:45 AM

    LOCATION LR4, Technological Institute    map it

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    CONTACT Olivia Wise    olivia.wise@northwestern.edu EMAIL

    CALENDAR McCormick-Chemical and Biological Engineering (ChBE)

  • Jun
    10

    Northwestern Engineering PhD Hooding and Master's Degree Recognition Ceremony

    McCormick School of Engineering and Applied Science

    9:00 AM Welsh-Ryan Arena

    EVENT DETAILSmore info

    TIME Monday, June 10, 2024 at 9:00 AM - 11:00 AM

    LOCATION Welsh-Ryan Arena   

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    CONTACT Amy Pokrass    amy.pokrass@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Jun
    10

    Northwestern Engineering Undergraduate Convocation

    McCormick School of Engineering and Applied Science

    2:00 PM Welsh-Ryan Arena

    EVENT DETAILSmore info

    TIME Monday, June 10, 2024 at 2:00 PM - 4:00 PM

    LOCATION Welsh-Ryan Arena   

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    CONTACT Amy Pokrass    amy.pokrass@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science

  • Aug
    14

    Undergraduate Quantum Summer School

    McCormick School of Engineering and Applied Science

    All Day Ford Motor Company Engineering Design Center

    EVENT DETAILSmore info

    TIME Wednesday, August 14, 2024

    LOCATION Ford Motor Company Engineering Design Center    map it

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    CONTACT Dongyang Li    lidongyang@northwestern.edu EMAIL

    CALENDAR McCormick School of Engineering and Applied Science