Tomography of Electrospun Carbon Nanotube Polymeric Blends by Focus Ion Beam: Alignment and Phase Separation Analysis from Multicontrast Electron Imaging
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In: Macromolecular Materials and Engineering, Vol. 302, No. 8, 1600479, 08.2017.
Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Tomography of Electrospun Carbon Nanotube Polymeric Blends by Focus Ion Beam
T2 - Alignment and Phase Separation Analysis from Multicontrast Electron Imaging
AU - Campo, Eva
AU - Yates, Douglas
AU - Berson, Benjamin
AU - Rojas, Wudmir
AU - Winter, Allen
AU - Ananth, Mohan
AU - Santiago-Aviles, Jorge J.
AU - Terentjev, Eugene M.
PY - 2017/8
Y1 - 2017/8
N2 - Multimodal focused ion beam (FIB) imaging on a polydimethylsiloxane/poly(methyl methacrylate) (PMMA)/multiwall carbon nanotube (MWCNT) electrospun composite has been applied to discriminate the phase-separated polymer blend and identify MWCNT fillers. Upon tomographic reconstruction, this discrimination has been possible through both atomic number and voltage contrast, the latter being enabled by preferential MWCNT segregation to PMMA. This study suggests that electrospinning could be affecting not only MWCNT alignment but also phase separation dynamics of immiscible polymers, yielding a porous structure throughout the fibers. This work opens the door to correlative materials science in polymer nanocomposites through FIB tomography, where voltage contrast is a main actor.
AB - Multimodal focused ion beam (FIB) imaging on a polydimethylsiloxane/poly(methyl methacrylate) (PMMA)/multiwall carbon nanotube (MWCNT) electrospun composite has been applied to discriminate the phase-separated polymer blend and identify MWCNT fillers. Upon tomographic reconstruction, this discrimination has been possible through both atomic number and voltage contrast, the latter being enabled by preferential MWCNT segregation to PMMA. This study suggests that electrospinning could be affecting not only MWCNT alignment but also phase separation dynamics of immiscible polymers, yielding a porous structure throughout the fibers. This work opens the door to correlative materials science in polymer nanocomposites through FIB tomography, where voltage contrast is a main actor.
U2 - 10.1002/mame.201600479
DO - 10.1002/mame.201600479
M3 - Article
VL - 302
JO - Macromolecular Materials and Engineering
JF - Macromolecular Materials and Engineering
SN - 1438-7492
IS - 8
M1 - 1600479
ER -