Malaysian Journal of Analytical Sciences Vol 20 No 5 (2016): 1084 - 1089

DOI: http://dx.doi.org/10.17576/mjas-2016-2005-13

 

 

 

EFFECT OF MULTI WALLED CARBON NANOTUBES ON THERMAL CONDUCTIVITY OF POLYLACTIC ACID NANOCOMPOSITE

 

(Kesan Penambahan Nanotiub Karbon Berbilang Dinding Ke Atas Kekonduksian Terma Polilaktik Asid Nanokomposit)

 

Adilah Mat Ali1, Sahrim Hj Ahmad1*, Mou’ad A.Tarawneh2

 

1School of Applied Physics, Faculty of Science and Technology,

Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia

2Department of Physics, Collage of Science,

Al-Hussein Bin Talal University, P.O. Box 20, Ma’an, Jordan

 

*Corresponding author: sahrim@ukm.edu.my

 

 

Received: 10 June 2015; Accepted: 21 July 2016

 

 

Abstract

Multi walled carbon nanotubes (MWCNT) hold the increasing interest in many different fields. To employ MWCNT as an effective reinforcement in order to enhance the thermal conductivity of polylactic acid (PLA) modified with liquid natural rubber (LNR), proper dispersion and appropriate interfacial adhesion between MWCNT and PLA/LNR have to be guaranteed. This paper used ultrasonic technique as the method to help to improve the dispersion of MWCNT in PLA/LNR matrix. The result shown that the sample with 3.5 wt.% of MWCNT provided higher thermal conductivity which is believe to be the optimum loading due to better dispersion of MWCNT in PLA/LNR matrix. The 4 wt.% of MWCNT shows decreasing of thermal conductivity due to the presence of agglomeration of MWCNT. The results confirmed by Scanning Electron Microscopy (SEM) micrograph. Fourier Transform Infrared (FTIR) spectra shown that there were no chemical changes happen.

 

Keywords:  polylactic acid, multi-walled carbon nanotubes, thermal conductivity, nanocomposites, ultrasonic

 

Abstrak

Tiub karbon berbilang dinding (MWCNT) telah menarik minat dalam pelbagai bidang yang berbeza. Bagi memastikan MWCNT dapat digunakan secara berkesan sebagai agen pengukuh dalam peningkatan kekonduksian terma polilaktik asid (PLA)/ cecair getah asli (LNR) nanokomposit, serakan dan lekatan antara muka yang sempurna dan baik di antara MWCNT dan PLA/LNR adalah di antara aspek yang perlu diberi perhatian. Di dalam kertas ini, teknik ultrasonik telah digunakan bagi memastikan membantu penyerakan MWCNT di dalam PLA/LNR matrik. Keputusan menunjukkan sampel yang mengandungi 3.5 wt% MWCNT menghasilkan kekonduksian terma yang tertinggi dengan pencapaian nilai kandungan optima disebabkan oleh serakan yang baik di dalam PLA/LNR matrik. Pada kandungan MWCNT 4 wt%, kekonduksian terma menunjukkan penurunan disebabkan oleh gumpalan MWCNT. Keputusan disahkan oleh Imbasan Elektron Microskopi (SEM) mikrograf. Spektra Fourier Transform Inframerah Spektroskopi (FTIR) pula menunjukkan tiada perubahan kimia yang berlaku.

 

Kata kunci:  polilaktik asid, tiub karbon berbilang dinding, kekonduksian terma, nanokomposit, ultrasonik

 

References

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