Malaysian Journal of Analytical Sciences Vol 22 No 5 (2018): 892 - 898

DOI: 10.17576/mjas-2018-2205-17

 

 

 

THE EFFECTS OF GLYCEROL ADDITION TO THE MECHANICAL PROPERTIES OF THERMOPLASTIC FILMS BASED ON JACKFRUIT SEED STARCH

 

(Kesan Penambahan Gliserol pada Sifat Mekanik Filem Thermoplastik Berdasarkan Kanji Biji Nangka)

 

Nur’Aishah Ahmad Shahrim*, Norshahida Sarifuddin, Hafizah Hanim Mohd Zaki, Ahmad Zahirani Ahmad Azhar

 

Department of Manufacturing and Materials Engineering,

International Islamic University Malaysia, 53100 Kuala Lumpur, Malaysia

 

*Corresponding author:  aisydahlia@gmail.com

 

 

Received: 20 July 2017; Accepted: 28 April 2018

 

 

Abstract

Thermoplastic films based on 3 wt.% jackfruit seed starch were prepared using 5 to 30 wt.% glycerol as plasticizer via solution casting method. The aim of this study is to investigate the effect of glycerol on the mechanical properties of films. According to the analysis, the optimum tensile strength of the film was obtained at 4.40 MPa, which revealed that the native starch granules were converted into a continuous phase in the presence of glycerol as indicated by scanning electron microscopy. The incorporation of glycerol in starch also showed the formation of hydrogen bond evidenced by Fourier transform infrared spectroscopy.

 

Keywords:  starch, jackfruit, glycerol, thermoplastic film

 

Abstrak

Filem thermoplastik berdasarkan 3 wt.% kanji biji nangka telah disediakan dengan menggunakan 5 ke 30 wt.% gliserol sebagai pemplastik melalui kaedah penuangan larutan. Tujuan kajian ini dijalankan adalah untuk menyiasat kesan penambahan gliserol terhadap sifat mekanik filem. Analisis kajian menunjukkan kekuatan tegangan optimum filem diperoleh pada 4.40 MPa, yang menunjukkan butir-butir kanji bertukar ke fasa berterusan dengan kehadiran gliserol seperti yang ditunjuk oleh mikroskop imbasan elektron (SEM). Penggabungan gliserol dalam kanji turut menunjukkan pembentukan ikatan hidrogen seperti yang dibuktikan oleh spektroskopi inframerah transformasi Fourier (FTIR).

 

Kata kunci:  kanji, nangka, gliserol, filem thermoplastik

 

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