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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.


Tensile modulus of PLA/5EPO with various xGnP loadings.
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f7-ijms-13-10920: Tensile modulus of PLA/5EPO with various xGnP loadings.

Mentions: Tensile modulus is a common method to measure the stiffness of a material and is a quantity used to characterize materials [30]. The higher the tensile modulus, the stiffer is the material, thus more stress is required to produce a given amount of strain. Figure 7 shows tensile modulus of PLA/5EPO/xGnP nanocomposites. PLA/5EPO blend exhibited a tensile modulus value of 948 MPa. The addition of 0.3 wt% of xGnP significantly decreases the tensile modulus, and hence the stiffness. This is due to the the fact that nanoplatelets can interact after the rotary relaxation via direct contacts or bridging by polymer chains, and build a sample spanning filler network, which gives rise to the elastic response as illustrated in Figure 6c. This signifies the material is less rigid compared to PLA/5EPO blend. However, at higher xGnP concentration, the close contact between xGnP clusters can give rise to a rigid filler network, which increase the tensile modulus.


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)

Tensile modulus of PLA/5EPO with various xGnP loadings.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f7-ijms-13-10920: Tensile modulus of PLA/5EPO with various xGnP loadings.
Mentions: Tensile modulus is a common method to measure the stiffness of a material and is a quantity used to characterize materials [30]. The higher the tensile modulus, the stiffer is the material, thus more stress is required to produce a given amount of strain. Figure 7 shows tensile modulus of PLA/5EPO/xGnP nanocomposites. PLA/5EPO blend exhibited a tensile modulus value of 948 MPa. The addition of 0.3 wt% of xGnP significantly decreases the tensile modulus, and hence the stiffness. This is due to the the fact that nanoplatelets can interact after the rotary relaxation via direct contacts or bridging by polymer chains, and build a sample spanning filler network, which gives rise to the elastic response as illustrated in Figure 6c. This signifies the material is less rigid compared to PLA/5EPO blend. However, at higher xGnP concentration, the close contact between xGnP clusters can give rise to a rigid filler network, which increase the tensile modulus.

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.