Influence of Magnetite Dispersion on Tensile Properties

Abstract:

Nanofibers have high cell affinity due to their fine structure and surface roughness, and are expected to be used as biomaterials. In particular, magnetic nanofibers containing magnetic particles are expected to be used for magnetically induced drug delivery systems and hyperthermia. However, due to the aggregation of the magnetic particles contained in the nanofibers, there is a problem that the aggregation location becomes a starting point of fracture and causes a decrease in tensile strength. In this study, to improve the dispersibility of magnetic particles in Magnetite/PLA nanofiber nonwoven fabrics for suppressing the decrease in tensile strength, magnetite is subjected to surface treatment with oleic acid or stearic acid and ultrasonic agitation. Magnetite/PLA nanofiber nonwoven fabric was prepared by the electrospinning method, and dispersion of magnetite in PLA nanofiber nonwoven fabric and tensile strength were evaluated. Magnetite dispersion was improved by the surface treatment and increasing the ultrasonic agitation time. In particular, by performing the stearic acid treatment and prolonging the ultrasonic agitation time, the magnetite dispersion tended to be improved. This treated Magnetite/PLA nanofiber nonwoven fabric showed higher tensile strength.

• Periodical: Key Engineering Materials (Volume 827)
• Pages: 190-195
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.827.190
• Online since: December 2019
• Authors: Kazuto Tanaka*, Yuta Ishii, Tsutao Katayama
• Keywords: Dispersibility, Electrospinning, Magnetite/PLA Nanofiber Nonwoven Fabric, Oleic Acid, Stearic Acid, Tensile Strength, Ultrasonic Agitation

References

[1] R. K. Singh, K. D. Patel, J. H. Lee, E. J. Lee, J. H. Kim, T. H. Kim and H. W. Kim, Potential of magnetic nanofiber scaffolds with mechanical and biological properties applicable for bone regeneration, , Plos One, vol. 9, no. 4, (2014), e91584.

DOI: 10.1371/journal.pone.0091584

[2] K. Tanaka, T. Okada and T. Katayama, Evaluation of Mechanical Properties of Magnetite/PLA Nanofibers,, Journal of the Society of Materials Science, vol. 67, no. 10, (2018), pp.911-917.

DOI: 10.2472/jsms.67.917

[3] B. Xue, Y. Jiang, F. Li, M. Xia, M. Sun, D. Liu, X. Zhang and L. Yu, Hydrophobic Modification of Dickite and Salt Spray Test Study on LLDPE/Modified Dickite Composite, Journal of Applied Polymer Science, vol.116, (2010), pp.3480-3488.

DOI: 10.1002/app.31897

[4] B. Krause, M. Mende, P. Potschke and G. Petzold, Dispersability and particle size distribution of CNTs in an aqueous surfactant dispersion as a function of ultrasonic treatment time,, CARBON, vol. 48, (2010), 2746-2754.

DOI: 10.1016/j.carbon.2010.04.002

[5] K. Nakatsuka and J. Shimoiizaka, Preparation of magnetic fluid and its application,, The Iron and Steel Institute of Japan, vol.73, no.1, (1987) pp.55-63.