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Graphene nanoplatelets as novel reinforcement filler in poly(lactic acid)/epoxidized palm oil green nanocomposites: mechanical properties.

Chieng BW, Ibrahim NA, Yunus WM, Hussein MZ, Giita Silverajah VS - Int J Mol Sci (2012)

Bottom Line: PLA/EPO reinforced with xGnP resulted in an increase of up to 26.5% and 60.6% in the tensile strength and elongation at break of the nanocomposites respectively, compared to PLA/EPO blend.However, incorporation of xGnP has no effect on the flexural strength and modulus.Mechanical properties of PLA were greatly improved by the addition of a small amount of graphene nanoplatelets (<1 wt%).

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia; E-Mails: mzobir@science.upm.edu.my (M.Z.H.); vsgiita@gmail.com (V.S.G.S.).

ABSTRACT
Graphene nanoplatelet (xGnP) was investigated as a novel reinforcement filler in mechanical properties for poly(lactic acid) (PLA)/epoxidized palm oil (EPO) blend. PLA/EPO/xGnP green nanocomposites were successfully prepared by melt blending method. PLA/EPO reinforced with xGnP resulted in an increase of up to 26.5% and 60.6% in the tensile strength and elongation at break of the nanocomposites respectively, compared to PLA/EPO blend. XRD pattern showed the presence of peak around 26.5° in PLA/EPO nanocomposites which corresponds to characteristic peak of graphene nanoplatelets. However, incorporation of xGnP has no effect on the flexural strength and modulus. Impact strength of PLA/5 wt% EPO improved by 73.6% with the presence of 0.5 wt% xGnP loading. Mechanical properties of PLA were greatly improved by the addition of a small amount of graphene nanoplatelets (<1 wt%).

No MeSH data available.


XRD patterns of graphene, PLA/EPO and PLA/EPO nanocomposites.
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f2-ijms-13-10920: XRD patterns of graphene, PLA/EPO and PLA/EPO nanocomposites.

Mentions: XRD is an effective method to determine whether xGnP exist as individual graphene sheets in the nanocomposites. Figure 2 shows the XRD patterns of as-received xGnP, PLA/EPO and selected PLA/EPO composite with various xGnP loading. The xGnP exhibits an intense peak at 2θ value of ~26.4°, assigned to the stacking of the single graphene layers at a distance of 0.34 nm [26]. There is no other peak observed for xGnP. On the other hand, the XRD patterns of PLA/5EPO blend and PLA/5EPO with various xGnP loadings exhibit an initial broad characteristic peak of PLA matrix at 2θ = ~16°. Notice that, there was no xGnP’s peak observed for PLA/5EPO/0.1 wt% which may be due to the low amount of ordered layer structure of xGnP. The disappearance of peak may also be due to the exfoliation and random distribution of the platelets within the polymer matrices at low loading of xGnP.


Graphene nanoplatelets as novel reinforcement filler in poly(lactic acid)/epoxidized palm oil green nanocomposites: mechanical properties.

Chieng BW, Ibrahim NA, Yunus WM, Hussein MZ, Giita Silverajah VS - Int J Mol Sci (2012)

XRD patterns of graphene, PLA/EPO and PLA/EPO nanocomposites.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC3472721&req=5

f2-ijms-13-10920: XRD patterns of graphene, PLA/EPO and PLA/EPO nanocomposites.
Mentions: XRD is an effective method to determine whether xGnP exist as individual graphene sheets in the nanocomposites. Figure 2 shows the XRD patterns of as-received xGnP, PLA/EPO and selected PLA/EPO composite with various xGnP loading. The xGnP exhibits an intense peak at 2θ value of ~26.4°, assigned to the stacking of the single graphene layers at a distance of 0.34 nm [26]. There is no other peak observed for xGnP. On the other hand, the XRD patterns of PLA/5EPO blend and PLA/5EPO with various xGnP loadings exhibit an initial broad characteristic peak of PLA matrix at 2θ = ~16°. Notice that, there was no xGnP’s peak observed for PLA/5EPO/0.1 wt% which may be due to the low amount of ordered layer structure of xGnP. The disappearance of peak may also be due to the exfoliation and random distribution of the platelets within the polymer matrices at low loading of xGnP.

Bottom Line: PLA/EPO reinforced with xGnP resulted in an increase of up to 26.5% and 60.6% in the tensile strength and elongation at break of the nanocomposites respectively, compared to PLA/EPO blend.However, incorporation of xGnP has no effect on the flexural strength and modulus.Mechanical properties of PLA were greatly improved by the addition of a small amount of graphene nanoplatelets (<1 wt%).

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia; E-Mails: mzobir@science.upm.edu.my (M.Z.H.); vsgiita@gmail.com (V.S.G.S.).

ABSTRACT
Graphene nanoplatelet (xGnP) was investigated as a novel reinforcement filler in mechanical properties for poly(lactic acid) (PLA)/epoxidized palm oil (EPO) blend. PLA/EPO/xGnP green nanocomposites were successfully prepared by melt blending method. PLA/EPO reinforced with xGnP resulted in an increase of up to 26.5% and 60.6% in the tensile strength and elongation at break of the nanocomposites respectively, compared to PLA/EPO blend. XRD pattern showed the presence of peak around 26.5° in PLA/EPO nanocomposites which corresponds to characteristic peak of graphene nanoplatelets. However, incorporation of xGnP has no effect on the flexural strength and modulus. Impact strength of PLA/5 wt% EPO improved by 73.6% with the presence of 0.5 wt% xGnP loading. Mechanical properties of PLA were greatly improved by the addition of a small amount of graphene nanoplatelets (<1 wt%).

No MeSH data available.