Incorporation of Magnetite in Toughened PLA Nanocomposite: Tensile and Thermal Stability

Abstract:

In this study, liquid natural rubber (LNR) toughened polylactic acid (PLA) incorporated with magnetite (Fe₃O₄) nanocomposites were fabricated via melt-compounding in an internal mixer and followed by hot/cold pressing. The effects of ultrasonic treatment time (1-3 hours) and Fe₃O₄ (0.5-4.0 wt%) nanoparticles loading on tensile, morphology and thermal stability were investigated. Based on tensile testing results, the ultrasonication time of 1 hour was served as the most suitable treatment period to achieve the optimum distribution of Fe₃O₄ within PLA/LNR matrix. Among the investigated nanoparticles loading, 1 wt% Fe₃O₄ nanocomposite presented the highest tensile strength of 23.7 MPa, Young’s modulus of 1293.5 MPa and strain at break of 2.8%. SEM micrographs showed that the over-treated nanocomposites with 2-3 hours and over-high nanoparticles loading had resulted in the formation of clusters in the matrix. With increasing Fe₃O₄ loading, the decomposition of PLA/LNR nanocomposites was initiated earlier.

• Periodical: Materials Science Forum (Volume 1048)
• Pages: 15-20
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1048.15
• Online since: January 2022
• Authors: Ruey Shan Chen*, SAHRIM Ahmad
• Keywords: Biopolymer, Liquid Natural Rubber, Magnetic Particles, Mechanical, TGA

References

[1] M.a.A. Tarawneh, R.S. Chen, S. Hj Ahmad, M.A. Al‐Tarawni, and S. Saraireh, Hybridization of a thermoplastic natural rubber composite with multi‐walled carbon nanotubes/silicon carbide nanoparticles and the effects on morphological, thermal, and mechanical properties. Polym. Compos. 40 (2019) E695-E703.

DOI: 10.1002/pc.24959

[2] R.S. Chen, M.F.H. Mohd Ruf, D. Shahdan, and S. Ahmad, Enhanced mechanical and thermal properties of electrically conductive TPNR/GNP nanocomposites assisted with ultrasonication. PloS one. 14 (2019) e0222662.

DOI: 10.1371/journal.pone.0222662

[3] S. Krishnamoorthi, S. Nagendharan, G. Manikandan, and R. Karthikeyan, Studies on Mechanical and Thermal Bheviours of Nano Clay Filled Linear Low Density Polyethylene Composites. Int. J. Recent Technol. Eng. 8 (2019) 98-102.

[4] P. Jayakrishnan and M. Ramesan, Synthesis, characterization, electrical conductivity and material properties of magnetite/polyindole/poly (vinyl alcohol) blend nanocomposites. Journal of Inorganic and Organometallic Polymers and Materials. 27 (2017) 323-333.

DOI: 10.1007/s10904-016-0474-8

[5] D. Jiang, Y. Huan, C. Sun, C. Hu, J. Guo, J. Long, M.A. Khan, D.P. Young, and Z. Guo, Thermal, mechanical and magnetic properties of functionalized magnetite/vinyl ester nanocomposites. RSC advances. 6 (2016) 91584-91593.

DOI: 10.1039/c6ra17190g

[6] A. Maharramov, M. Ramazanov, L. Di Palma, F. Hajiyeva, H. Shirinova, and U. Hasanova, Role of structure of the Pp/magnetite nanocomposites on their thermal properties. Chem. Eng. Trans. 60 (2017) 55-60.

DOI: 10.1007/s11182-018-1253-5

[7] B. Yu, M. Wang, H. Sun, F. Zhu, J. Han, and G. Bhat, Preparation and properties of poly (lactic acid)/magnetic Fe 3 O 4 composites and nonwovens. RSC advances. 7 (2017) 41929-41935.

DOI: 10.1039/c7ra06427f

[8] D. Shahdan, S.H. Ahmad, and M.H. Flaifel. Effect of ultrasonic treatment on tensile properties of PLA/LNR/NiZn ferrite nanocomposite. in AIP Conference Proceedings. 2013. American Institute of Physics.

DOI: 10.1063/1.4858633

[9] L. Di Palma, I. Bavasso, F. Sarasini, J. Tirillò, D. Puglia, F. Dominici, L. Torre, A. Galluzzi, M. Polichetti, and M.A. Ramazanov, Effect of nano‐magnetite particle content on mechanical, thermal and magnetic properties of polypropylene composites. Polym. Compos. 39 (2018) E1742-E1750.

DOI: 10.1002/pc.24727

[10] F.D. Zailan, R.S. Chen, D. Shahdan, and S. Ahmad, Effect of conductive polyaniline in thermoplastic natural rubber blends on the mechanical, thermal stability, and electrical conductivity properties. J. Appl. Polym. Sci. 136 (2019) 47527.

DOI: 10.1002/app.47527

[11] D. Shahdan, S. Ahmad, R.S. Chen, A. Omar, F.D. Zailan, and N.A.A. Hassan, Mechanical performance, heat transfer and conduction of ultrasonication treated polyaniline bio-based blends. Int. Commun. Heat Mass Transf. 117 (2020) 104742.

DOI: 10.1016/j.icheatmasstransfer.2020.104742

[12] D. Shahdan, R.S. Chen, and S. Ahmad, Sifat Mekanik dan Terma Nanokomposit Asid Polilaktik/Cecair Getah Asli. Sains Malaysiana. 49 (2020) 2101-2111.

DOI: 10.17576/jsm-2020-4909-08