Seminar & Colloquium
[Lecture: 11월 10일(금), 오전 10시] Prof. Robert J. Macfarlane, Massachusetts Institute of Technology(MIT)
Title
Nanocomposite Synthesis via Brush Particles
Speaker
Prof. Robert J. Macfarlane, department of Materials Science and Engineering, Massachusetts Institute of Technology(MIT)
Education
- 2013 PhD in Chemistry, Northwestern University, Evanston, IL
- 2006 MS in Inorganic Chemistry Yale University, New Haven, CT
- 2004 BA in Biochemistry, Willamette University, Salem, OR
Experience
- 2020 ~ present Massachusetts Institute of Technology, Associate Professor
- 2015 ~ 2020 Massachusetts Institute of Technology, Assistant Professor
- 2013 ~ 2015 California Institute of Technology, Kavli Postdoctoral Fellow
| Date | Friday, November 10th 2023
| Time | 10:00 ~
| Venue | 온라인(https://snu-ac-kr.zoom.us/j/7487378147?pwd=SFQwQjdIV3NLNktmaG81eUR6LzRTUT09)
ID:748 737 8147, PW:Zm6NkF
[Abstract]
Polymer nanocomposites consisting of inorganic particles embedded in a polymer matrix are attractive platforms for complex materials design. Combining the vastly different chemical and physical characteristics of these two material types allows for mechanical, chemical, electromagnetic, optical, or combinations of these properties that would not possible with either component alone. While such composites therefore offer a massive parameter space to tailor material performance, the process of designing new, useful nanocomposites is not always as straightforward as simply blending a set of nanoparticle building blocks into a soft macromolecular matrix.
The challenge in composite synthesis via mechanical mixing of particles and polymers is that uncontrolled or unfavorable interactions between the particle fillers and the surrounding polymers can cause particle aggregation, meaning that the interfaces between these components has to be carefully considered. Furthermore, many desirable properties are heavily influenced or entirely depend on the 3D organization of the particle fillers throughout the composite. Thus, there is ample opportunity for next-generation composite design to both maximize material performance, and to introduce new emergent phenomena that occur when nanoparticles are arranged in ordered arrays.
In this seminar, I will highlight our recent work exploring pathways to designing nanocomposites via the integration of supramolecular chemistry, polymer synthesis, and materials processing. Our group has established a suite of “brush particles” that are inherently composite architectures containing rigid inorganic particle cores, soft polymer brush coatings, and supramolecular binding groups that dictate interactions between the polymer and nanoparticle components. Key advancements presented will include synthesis methods to achieve macroscopically scalable composites with ~85 wt% (~60 vol%) inorganic content that remain mechanically robust and readily processible. Additionally, the first “self-assembly” method capable of scalably fabricating macroscopic, fully 3D composites consisting entirely of nanoparticle superlattice arrays will be discussed. I will outline the advancements that guide our thinking about composite synthesis, underscore key design motifs for brush particle-based nanocomposites, and detail how materials chemistry and processing permit the formation of materials with controlled hierarchical organization across 7 orders of magnitude in length scale simultaneously.
| Host | 김영은 교수(02-880-7086)