Nanotech 2010

Hybrid Poly(L-Lactide) (PLA) Nanofibers Incorporating POSS-Modified Multiwalled Carbon Nanotubes Prepared by Electrospinning

K-O Kim, I. Jeong, B-S Kim, Y-A Kim, I-S Kim
Shinshu University, JP

Keywords: hybrid materials, nanostructure, carbon nanotubes


Organic–inorganic hybrid composites have attracted considerable attention because of their distinctive physical and chemical properties. Specifically, the multiwalled carbon nanotube (MWNT)-polymer composites among them has expected when uniform dispersion of the MWNTs in the polymer matrix is achieved without their aggregations. Consequently, a strong MWNT/polymer matrix interaction is needed. Recently, the MWNT was successfully functionalized with aminopropylisooctyl-polyhedral oligosilsesquioxane (POSS) by reacting the amine groups in POSS with the MWNTs functionalized with –COCl groups, and it was reported that a more uniform and fine dispersion of MWNTs was achieved throughout the polymer matrix after functionalization due to the strong interfacial adhesion between the MWNTs and the polymer matrix. There have been less studied on unique micristructure and properties of electrospun nanofibers incorporating POSS hybrids. In this work, we attempt to modify the MWNTs with POSS for well-dispersion of the MWNTs in the poly(lactic acid) (PLA) matrix and prepare electrospun poly(lactic acid) (PLA) hybrid fibers, which have the biodegradability, biocompatibility, and good mechanical strength and shape-memory effect, incorporating POSS-modified MWNTs. In addition, we may expect that POSS covers/cures the functionalized MWNTs with lowered mechanical properties due to an acid-treatment of original MWNTs, and then may strength the mechanical properties.
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