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Thermo-physical behaviors of carbon nanofiber reinforced polylactic acid

Published online by Cambridge University Press:  28 February 2013

Ananta Raj Adhikari ,
Kamal Sarkar  and
Karen Lozano
Ananta Raj Adhikari
Affiliation:
Texas Center for Superconductivity, University of Houston, Houston, TX-77004
Kamal Sarkar
Affiliation:
Department of Mechanical Engineering, University of Texas-Pan American, Edinburg, TX-78541
Karen Lozano
Affiliation:
Department of Mechanical Engineering, University of Texas-Pan American, Edinburg, TX-78541
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Abstract:

Studies have demonstrated that the reinforcement of polymeric matrices using nanofiller can results with better thermo-physical properties of polymer. Carbon nanofiber (CNF) is a unique quasi-one dimensional nanostructure with large numbers of edges and defects compared to carbon nanotube (CNT). Further the availability in large quantity along with lower cost makes them an important nanomaterial for future technology. We have previously used CNF in different thermoplastic polymers. In this study CNFs were used with water soluble thermoplastic aliphatic polyster polylactic acid (PLA) and studied their thermal and mechanical properties. Thermal analysis using Thermogravimetric Analysis showed enhanced thermal stability of the polymer at higher nanotube loading (>1 wt%) and decrease of thermal stability at higher loading (>10 wt%). Crystallization thermogram of PLA was modified heavily with the addition of nanofibers changing clearly from one stage to two stage crystallization. In addition, CNF facilitates the crystallization of PLA resulting in an increase of its crystallization. The mechanical testing showed the steady increase of modulus of the composites with the nanofiber content within the range of study which can be regarded as due to the change in interface property of the composites.

Keywords

calorimetrypolymerthermogravimetric analysis (TGA)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1505: Symposium W – Carbon Nanomaterials , 2013 , mrsf12-1505-w21-03
Copyright
Copyright © Materials Research Society 2013

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