Enhanced directional thermal conductivity of polylactic acid/polybutylene adipate terephthalate ternary composite filled with oriented and surface treated boron nitride |
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| Affiliation: | 1. Laboratoire des Matériaux Organiques, Faculté de Technologie, Université Abderrahmane Mira, Route de Targa Ouzemour, 06000 Bejaia, Algeria;2. CREPEC, Département de génie chimique, Polytechnique Montréal, C. P. 6079, Succ. Centre-Ville, Montréal, QC H3C 3A7, Canada;3. Université de Bretagne-Sud, Institut de Recherche Dupuy De Lôme (iRDL) CNRS, FRE 3744, B.P. 92116 - 56321 Lorient Cedex, France;1. Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;2. National Demonstration Center for Experimental Teaching of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;1. Department of Physics, National Institute of Technology, Warangal 506004, Telangana, India;2. Bhabha Atomic Research Centre, RTDD, Trombay, 400085 Mumbai, India |
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| Abstract: | A combination of solution casting and melt extrusion technique was used to fabricate Boron nitride (BN)-filled Polylactic acid (PLA)/polybutylene adipate terephthalate (PBAT) blend composites. The BN particles were surface treated with a silane coupling agent and functionalization was confirmed via spectroscopic analysis. Field emission scanning electron microscopy confirmed that the BN surface treatment improved the particle adhesion with the polymer matrices and acted as a compatibilizer for the polymers. Moreover, changes in the particle orientation in the blend composite yielded improved thermal conductivity in different directions. The inclusion of the treated BN particles enhanced the in-plane (~1.1 W m−1K−1) and through-plane (~0.8 W m−1K−1) thermal conductivity of the composites as compared to the neat PLA. In addition, the storage modulus of the composite become more than 3 GPa that is twice that of the PLA/PBAT blend with a reasonable tensile property. In general, compared with the PLA/PBAT blend, the blend composites exhibited superior thermal and mechanical properties. |
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| Keywords: | Ternary composite Anisotropy Extrusion Thermal analysis |
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