TY - JOUR
T1 - Interfacially-grafted Single Wall Carbon Nanotube / Poly (vinyl alcohol) Composite Fibers
AU - Lee, Wonjun
AU - Clancy, Adam
AU - Fernández-Toribio, Juan
AU - Anthony, David
AU - White, Edward
AU - Solano, Eduardo
AU - Leese, Hannah
AU - Vilatela, Juan
AU - Shaffer, Milo
PY - 2019/5/1
Y1 - 2019/5/1
N2 - Nanocomposites are critically influenced by interfacial interactions between the reinforcement and matrix. Polyvinyl alcohol (PVOH) of varying molecular weights were prepared and grafted-to single-walled carbon nanotubes (SWCNTs), to improve the interfacial interaction with a homopolymer PVOH matrix. Nanocomposite fibers were coagulation spun across a broad range of loading fractions, controlled by the spinning dope composition. An intermediate grafted-PVOH molecular weight (10 kDa) maximized grafting ratio, and the final composite mechanical performance; the positive effects were attributed to the increased degree of dispersion of the SWCNTs in the dope, as well as the favorable interface. The PVOH grafting increased the stability of the SWCNT loading fractions (up to 45 wt.%), offering increased strength (up to 1100 MPa) and stiffness (up to 38.5 GPa); at the same time, strain-to-failures remained high (up to 23.3%), resulting in high toughness (up to 125 J g−1).
AB - Nanocomposites are critically influenced by interfacial interactions between the reinforcement and matrix. Polyvinyl alcohol (PVOH) of varying molecular weights were prepared and grafted-to single-walled carbon nanotubes (SWCNTs), to improve the interfacial interaction with a homopolymer PVOH matrix. Nanocomposite fibers were coagulation spun across a broad range of loading fractions, controlled by the spinning dope composition. An intermediate grafted-PVOH molecular weight (10 kDa) maximized grafting ratio, and the final composite mechanical performance; the positive effects were attributed to the increased degree of dispersion of the SWCNTs in the dope, as well as the favorable interface. The PVOH grafting increased the stability of the SWCNT loading fractions (up to 45 wt.%), offering increased strength (up to 1100 MPa) and stiffness (up to 38.5 GPa); at the same time, strain-to-failures remained high (up to 23.3%), resulting in high toughness (up to 125 J g−1).
UR - http://www.scopus.com/inward/record.url?scp=85061610275&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2019.01.075
DO - 10.1016/j.carbon.2019.01.075
M3 - Article
VL - 146
SP - 162
EP - 171
JO - Carbon
JF - Carbon
SN - 0008-6223
IS - 0008-6223
ER -
