Nanocomposite of poly(L-lactic acid) with inorganic nanotubes of WS                         2

Hila Shalom; Xiao Meng Sui; Olga Elianov; Vlad Brumfeld; Rita Rosentsveig; Iddo Pinkas; Yishay Feldman; Nir Kampf; H. D. Wagner; Noa Lachman; Reshef Tenne

doi:10.3390/lubricants7030028

Nanocomposite of poly(L-lactic acid) with inorganic nanotubes of WS ₂

Hila Shalom, Xiao Meng Sui, Olga Elianov, Vlad Brumfeld, Rita Rosentsveig, Iddo Pinkas, Yishay Feldman, Nir Kampf, H. D. Wagner, Noa Lachman, Reshef Tenne

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

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.

Original language	English
Article number	28
Journal	Lubricants
Volume	7
Issue number	3
DOIs	https://doi.org/10.3390/lubricants7030028
State	Published - 2019
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2019 by the authors.

Funding

Funding: This research was supported by the KAMIN grant No. 713080 of the Israeli Innovation Authority. We acknowledge the support of the Irving and Cherna Moskowitz Center for Nano and Bio-Nano Imaging; the Perlman Family Foundation; the Kimmel Center for Nanoscale Science Grant No. 43535000350000; and the Irving and Azelle Waltcher Foundations in honor of Prof. M. Levy Grant No. 720821.

Funders	Funder number
Bio-Nano Imaging
Israeli Innovation Authority
Perlman Family Foundation
Center for Nanoscale Science and Technology	720821, 43535000350000

Keywords

Inorganic nanotubes
PLLA
Solid lubricants

Access to Document

10.3390/lubricants7030028

Cite this

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title = " Nanocomposite of poly(L-lactic acid) with inorganic nanotubes of WS 2 ",

abstract = " 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.",

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author = "Hila Shalom and Sui, {Xiao Meng} and Olga Elianov and Vlad Brumfeld and Rita Rosentsveig and Iddo Pinkas and Yishay Feldman and Nir Kampf and Wagner, {H. D.} and Noa Lachman and Reshef Tenne",

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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

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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.

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