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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.


Nitrogen adsorption/desorption isotherms of graphene nanoplatelets.
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f3-ijms-13-10920: Nitrogen adsorption/desorption isotherms of graphene nanoplatelets.

Mentions: The N2 adsorption-desorption isotherm of graphene nanoplatelets is shown in Figure 3. The BET specific surface area of graphene nanoplatelets is about 226.8 m2/g compared to the graphite powder which is about 8.5 m2/g (the data was not shown). This indicates that the average particle size of graphite has been decreased. However, the specific surface area (226.8 m2/g) of the xGnP is smaller than the theoretical specific surface area of single-layer graphene sheets (2620 m2/g). A hysteresis loop in the nitrogen adsorption/desorption isotherms of graphene was also observed. The hysteresis loop resembles type H3 in IUPAC (International Union of Pure and Applied Chemistry) classification, resulting from slit-shaped pores between parallel layers [28]. xGnP are stacks of a few graphene sheets and the porosity might arise from N2 gases penetration within the inter-sheet slits. The total pore volume of xGnP is as high as 0.488 cm3/g, but the micropore volume is only 0.011 cm3/g, revealing a very low micropore content. The average pore diameter is about 1.713 nm calculated by the BET model.


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)

Nitrogen adsorption/desorption isotherms of graphene nanoplatelets.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f3-ijms-13-10920: Nitrogen adsorption/desorption isotherms of graphene nanoplatelets.
Mentions: The N2 adsorption-desorption isotherm of graphene nanoplatelets is shown in Figure 3. The BET specific surface area of graphene nanoplatelets is about 226.8 m2/g compared to the graphite powder which is about 8.5 m2/g (the data was not shown). This indicates that the average particle size of graphite has been decreased. However, the specific surface area (226.8 m2/g) of the xGnP is smaller than the theoretical specific surface area of single-layer graphene sheets (2620 m2/g). A hysteresis loop in the nitrogen adsorption/desorption isotherms of graphene was also observed. The hysteresis loop resembles type H3 in IUPAC (International Union of Pure and Applied Chemistry) classification, resulting from slit-shaped pores between parallel layers [28]. xGnP are stacks of a few graphene sheets and the porosity might arise from N2 gases penetration within the inter-sheet slits. The total pore volume of xGnP is as high as 0.488 cm3/g, but the micropore volume is only 0.011 cm3/g, revealing a very low micropore content. The average pore diameter is about 1.713 nm calculated by the BET model.

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.