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Aramid Nanofiber Templated In Situ SNAr Polymerization for Maximizing the Performance of All-Organic Nanocomposites
journal contribution
posted on 2020-03-26, 15:45 authored by Seul-A Park, Youngho Eom, Hyeonyeol Jeon, Jun Mo Koo, Taehyung Kim, Jaemin Jeon, Moon Jeong Park, Sung Yeon Hwang, Byeong-Su Kim, Dongyeop X. Oh, Jeyoung ParkThe
performance limits of conventional super engineering plastics with
inorganic nanofillers are surpassed by all-organic nanocomposites
prepared via in situ SNAr polymerization of polysulfone
(PSU) in the presence of a highly dispersed aramid nanofiber (ANF)
solution. The latter is directly used, bypassing the energy-consuming,
nanostructure-damaging workup process. Using only a 0.15 wt % nanofiller,
the all-organic nanocomposite shows an ultimate tensile strength 1.6×
higher and 3.4× tougher than neat PSU and its blending counterpart
due to the mutually interactive filler and maximally homogenized matrix.
The exceptional toughness of the ANF/PSU nanocomposite originates
from the grafted PSU on the surface of ANF; it drives stress-delocalized
deformation, as revealed by stress-absorbable viscoelastic behavior
and ductile elongation of materials. This material is a promising
candidate for use as a filler-interactive, high-performance nanocomposite.
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All-Organic Nanocompositesperformance limitsall-organic nanocompositenanofillernanostructure-damaging workup processAramid Nanofiber Templatedengineering plasticsductile elongationmaterialaramid nanofiberSitu S N Ar PolymerizationANFdrives stress-delocalized deformationall-organic nanocompositesS N Ar polymerizationPSU
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