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

doi: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

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

School of Mechanical and Aerospace Engineering

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

70 Citations (Scopus)

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 language	English
Pages (from-to)	48-57
Number of pages	10
Journal	Thermochimica Acta
Volume	597
Early online date	17 Oct 2014
DOIs	https://doi.org/10.1016/j.tca.2014.10.007
Publication status	Published - 10 Dec 2014

Keywords

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

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Papageorgiou, G. Z., Terzopoulou, Z., Bikiaris, D., Triantafyllidis, K. S., 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, 597, 48-57. https://doi.org/10.1016/j.tca.2014.10.007

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

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",

year = "2014",

month = dec,

day = "10",

doi = "10.1016/j.tca.2014.10.007",

language = "English",

volume = "597",

pages = "48--57",

journal = "Thermochimica Acta",

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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

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

SN - 0040-6031

VL - 597

SP - 48

EP - 57

JO - Thermochimica Acta

JF - Thermochimica Acta

ER -

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

Abstract

Keywords

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