TY - JOUR
T1 - Nanocomposite of poly(L-lactic acid) with inorganic nanotubes of WS 2
AU - Shalom, Hila
AU - Sui, Xiao Meng
AU - Elianov, Olga
AU - Brumfeld, Vlad
AU - Rosentsveig, Rita
AU - Pinkas, Iddo
AU - Feldman, Yishay
AU - Kampf, Nir
AU - Wagner, H. D.
AU - Lachman, Noa
AU - Tenne, Reshef
N1 - Publisher Copyright:
© 2019 by the authors.
PY - 2019
Y1 - 2019
N2 - Composites of poly(L-lactic acid) (PLLA) reinforced by adding inorganic nanotubes of tungsten disulfide (INT-WS 2 ) were prepared by solvent casting. In addition to the pristine nanotubes, PLLA nanocomposites containing surface modified nanotubes were studied as well. Several surface-active agents, including polyethylene imine (PEI),were studied in this context. In addition, other biocompatible polymers, like poly D,L-lactic acid (PDLLA) and others were considered in combination with the INT-WS 2 . The nanotubes were added to the polymer in different proportions up to 3 wt %. The dispersion of the nanotubes in the nanocomposites were analyzed by several techniques, including X-ray tomography microscopy (Micro-XCT). Moreover, high-temperature rheological measurements of the molten polymer were conducted. In contrast to other nanoparticles, which lead to a considerable increase of the viscosity of the molten polymer, the WS 2 nanotubes did not affect the viscosity significantly. They did not affect the complex viscosity of the molten PLLA phase, either. The mechanical and tribological properties of the nanocomposites were found to improve considerably by adding the nanotubes. A direct correlation was observed between the dispersion of the nanotubes in the polymer matrix and its mechanical properties.
AB - Composites of poly(L-lactic acid) (PLLA) reinforced by adding inorganic nanotubes of tungsten disulfide (INT-WS 2 ) were prepared by solvent casting. In addition to the pristine nanotubes, PLLA nanocomposites containing surface modified nanotubes were studied as well. Several surface-active agents, including polyethylene imine (PEI),were studied in this context. In addition, other biocompatible polymers, like poly D,L-lactic acid (PDLLA) and others were considered in combination with the INT-WS 2 . The nanotubes were added to the polymer in different proportions up to 3 wt %. The dispersion of the nanotubes in the nanocomposites were analyzed by several techniques, including X-ray tomography microscopy (Micro-XCT). Moreover, high-temperature rheological measurements of the molten polymer were conducted. In contrast to other nanoparticles, which lead to a considerable increase of the viscosity of the molten polymer, the WS 2 nanotubes did not affect the viscosity significantly. They did not affect the complex viscosity of the molten PLLA phase, either. The mechanical and tribological properties of the nanocomposites were found to improve considerably by adding the nanotubes. A direct correlation was observed between the dispersion of the nanotubes in the polymer matrix and its mechanical properties.
KW - Inorganic nanotubes
KW - PLLA
KW - Solid lubricants
UR - http://www.scopus.com/inward/record.url?scp=85063862995&partnerID=8YFLogxK
U2 - 10.3390/lubricants7030028
DO - 10.3390/lubricants7030028
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AN - SCOPUS:85063862995
SN - 2075-4442
VL - 7
JO - Lubricants
JF - Lubricants
IS - 3
M1 - 28
ER -