Evaluation of the formed interface in biodegradable poly(l-lactic acid)/graphene oxide nanocomposites and the effect of nanofillers on mechanical and thermal properties

George Z. Papageorgiou, Zoe Terzopoulou, Dimitrios Bikiaris, Konstantinos S. Triantafyllidis, Evmorfia Diamanti, Dimitrios Gournis, Panagiotis Klonos, Elias Giannoulidis, Polycarpos Pissis

Research output: Contribution to journalArticle

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Abstract

Graphene oxide (GO) and graphene oxide modified with dodekylamine (org-GO) were combined with poly(l-lactic acid) (PLLA) to prepare new nanocomposites. WAXD patterns showed that in nanocomposites the GO and org-GO was exfoliated, as the characteristic peaks of the filler totally disappeared. Thermal behavior of the nanocomposites was studied with DSC and compared to that of the neat PLLA. Acceleration of crystallization was observed under isothermal or non-isothermal conditions. The org-GO showed enhanced nucleation activity, resulting in faster crystallization rates in the respective nanocomposites. No substantial change in the glass transition temperature was observed, but a lower increase in heat capacity was found in nanocomposites, in good correlation with a lower dielectric strength of the segmental relaxation associated with the glass transition. Biodegradation rates were enhanced in nanocomposites.
Original languageEnglish
Pages (from-to)48-57
Number of pages10
JournalThermochimica Acta
Volume597
Early online date17 Oct 2014
DOIs
Publication statusPublished - 10 Dec 2014

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lactic acid
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Lactic acid
Oxides
Graphene
Lactic Acid
Nanocomposites
nanocomposites
graphene
Thermodynamic properties
thermodynamic properties
mechanical properties
Mechanical properties
oxides
evaluation
Crystallization
crystallization
biodegradation
Biodegradation
fillers

Keywords

  • Biodegradation
  • Dielectric relaxation
  • Graphene oxide
  • Nanocomposites
  • Poly(l-lactic acid)
  • Thermal properties

Cite this

Papageorgiou, George Z. ; Terzopoulou, Zoe ; Bikiaris, Dimitrios ; Triantafyllidis, Konstantinos S. ; Diamanti, Evmorfia ; Gournis, Dimitrios ; Klonos, Panagiotis ; Giannoulidis, Elias ; Pissis, Polycarpos. / Evaluation of the formed interface in biodegradable poly(l-lactic acid)/graphene oxide nanocomposites and the effect of nanofillers on mechanical and thermal properties. In: Thermochimica Acta. 2014 ; Vol. 597. pp. 48-57.
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abstract = "Graphene oxide (GO) and graphene oxide modified with dodekylamine (org-GO) were combined with poly(l-lactic acid) (PLLA) to prepare new nanocomposites. WAXD patterns showed that in nanocomposites the GO and org-GO was exfoliated, as the characteristic peaks of the filler totally disappeared. Thermal behavior of the nanocomposites was studied with DSC and compared to that of the neat PLLA. Acceleration of crystallization was observed under isothermal or non-isothermal conditions. The org-GO showed enhanced nucleation activity, resulting in faster crystallization rates in the respective nanocomposites. No substantial change in the glass transition temperature was observed, but a lower increase in heat capacity was found in nanocomposites, in good correlation with a lower dielectric strength of the segmental relaxation associated with the glass transition. Biodegradation rates were enhanced in nanocomposites.",
keywords = "Biodegradation, Dielectric relaxation, Graphene oxide, Nanocomposites, Poly(l-lactic acid), Thermal properties",
author = "Papageorgiou, {George Z.} and Zoe Terzopoulou and Dimitrios Bikiaris and Triantafyllidis, {Konstantinos S.} and Evmorfia Diamanti and Dimitrios Gournis and Panagiotis Klonos and Elias Giannoulidis and Polycarpos Pissis",
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Papageorgiou, GZ, Terzopoulou, Z, Bikiaris, D, Triantafyllidis, KS, Diamanti, E, Gournis, D, Klonos, P, Giannoulidis, E & Pissis, P 2014, 'Evaluation of the formed interface in biodegradable poly(l-lactic acid)/graphene oxide nanocomposites and the effect of nanofillers on mechanical and thermal properties', Thermochimica Acta, vol. 597, pp. 48-57. https://doi.org/10.1016/j.tca.2014.10.007

Evaluation of the formed interface in biodegradable poly(l-lactic acid)/graphene oxide nanocomposites and the effect of nanofillers on mechanical and thermal properties. / Papageorgiou, George Z.; Terzopoulou, Zoe; Bikiaris, Dimitrios; Triantafyllidis, Konstantinos S.; Diamanti, Evmorfia; Gournis, Dimitrios; Klonos, Panagiotis; Giannoulidis, Elias; Pissis, Polycarpos.

In: Thermochimica Acta, Vol. 597, 10.12.2014, p. 48-57.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Evaluation of the formed interface in biodegradable poly(l-lactic acid)/graphene oxide nanocomposites and the effect of nanofillers on mechanical and thermal properties

AU - Papageorgiou, George Z.

AU - Terzopoulou, Zoe

AU - Bikiaris, Dimitrios

AU - Triantafyllidis, Konstantinos S.

AU - Diamanti, Evmorfia

AU - Gournis, Dimitrios

AU - Klonos, Panagiotis

AU - Giannoulidis, Elias

AU - Pissis, Polycarpos

PY - 2014/12/10

Y1 - 2014/12/10

N2 - Graphene oxide (GO) and graphene oxide modified with dodekylamine (org-GO) were combined with poly(l-lactic acid) (PLLA) to prepare new nanocomposites. WAXD patterns showed that in nanocomposites the GO and org-GO was exfoliated, as the characteristic peaks of the filler totally disappeared. Thermal behavior of the nanocomposites was studied with DSC and compared to that of the neat PLLA. Acceleration of crystallization was observed under isothermal or non-isothermal conditions. The org-GO showed enhanced nucleation activity, resulting in faster crystallization rates in the respective nanocomposites. No substantial change in the glass transition temperature was observed, but a lower increase in heat capacity was found in nanocomposites, in good correlation with a lower dielectric strength of the segmental relaxation associated with the glass transition. Biodegradation rates were enhanced in nanocomposites.

AB - Graphene oxide (GO) and graphene oxide modified with dodekylamine (org-GO) were combined with poly(l-lactic acid) (PLLA) to prepare new nanocomposites. WAXD patterns showed that in nanocomposites the GO and org-GO was exfoliated, as the characteristic peaks of the filler totally disappeared. Thermal behavior of the nanocomposites was studied with DSC and compared to that of the neat PLLA. Acceleration of crystallization was observed under isothermal or non-isothermal conditions. The org-GO showed enhanced nucleation activity, resulting in faster crystallization rates in the respective nanocomposites. No substantial change in the glass transition temperature was observed, but a lower increase in heat capacity was found in nanocomposites, in good correlation with a lower dielectric strength of the segmental relaxation associated with the glass transition. Biodegradation rates were enhanced in nanocomposites.

KW - Biodegradation

KW - Dielectric relaxation

KW - Graphene oxide

KW - Nanocomposites

KW - Poly(l-lactic acid)

KW - Thermal properties

U2 - 10.1016/j.tca.2014.10.007

DO - 10.1016/j.tca.2014.10.007

M3 - Article

VL - 597

SP - 48

EP - 57

JO - Thermochimica Acta

JF - Thermochimica Acta

SN - 0040-6031

ER -