MJAS Vol 27 No 1 (2023)

Malaysian Journal of Analytical Sciences, Vol 27 No 1 (2023): 63 - 73

THE EFFECT OF NANOFILLERS ON THE FUNCTIONAL PROPERTIES OF PLA AND CHITOSAN BASED FILM

(Kesan Pengisian Nano Kepada Sifat Filem yang Berasaskan Asid Polilatik dan Kitosan)

Raja Hasnida Raja Hashim^1*, Ahmad Anas Nagoor Gunny^1,2, Sam Sung Ting¹,

Nor Helya Iman Kamaludim¹, Subash C. B. Gopinath^2,3

¹Faculty of Chemical Engineering Technology,

Universiti Malaysia Perlis, Kompleks Pusat Pengajian Jejawi 3,

Kawasan Perindustrian Jejawi, 02600, Arau, Perlis, Malaysia

² Centre of Excellence for Biomass Utilization,

Faculty of Chemical Engineering Technology,

Universiti Malaysia Perlis, 02600, Arau, Perlis, Malaysia

³Institute of Nano Electronic Engineering,

Universiti Malaysia, Perlis, 01000 Kangar, Perlis, Malaysia

^*Corresponding author: ahmadanas@unimap.edu.my

Received: 20 September 2021; Accepted: 13 September 2022; Published: 22 February 2023

Abstract

The aim of this study was to develop poly (lactic acid) and chitosan-based films and to examine the effect of cellulose nanocrystal (CNC) as nanofillers on the properties of the films. The biofilms were prepared by solvent casting method. The physical and mechanical properties of the resulting films were examined. SEM analysis showed that the surface of PLA/Cs films smoother when 1% and 2 % of CNC were added. The results for percent of water absorption of the films increased with increasing amount of CNC in PLA/Chitosan matrix. Tensile test results indicated higher TS value by incorporation of 2% of CNC. However, the PLA/Chitosan-CNC films at 3% and 4% CNC concentration exhibited a decreased TS value. PLA/Chitosan films were improved with the addition of a small amount of CNC resulting in PLA nanocomposite, which will be further evaluated for fruit packaging applications. The data obtained through this research could contribute to the establishment of a biofilms with improved the physical and mechanical properties promising significant advantages in term of longer storage life, maintaining safety, and keeping quality of a product especially in fruit packaging.

Keywords: polylactic acid, chitosan, cellulose nanocrystal, films, packaging

Abstrak

Tujuan kajian ini adalah untuk membuat filem berasaskan poli (asid laktik) dan kitosan dan mengkaji kesan kristal nano selulosa (CNC) sebagai pengisi nano pada sifat filem. Biofilm tersebut disiapkan dengan kaedah tuangan pelarut. Sifat fizikal dan mekanikal filem yang dihasilkan diperiksa. Analisis SEM menunjukkan bahawa permukaan filem PLA/Cs lebih licin apabila 1% dan 2 % CNC ditambah.Selanjutnya, peratus penyerapan air filem meningkat dengan peningkatan jumlah CNC dalam matriks PLA/ kitosan. Hasil ujian tegangan menunjukkan nilai TS yang lebih tinggi dengan memasukkan 2% CNC. Walau bagaimanapun, filem PLA / Chitosan-CNC pada kepekatan CNC 3% dan 4% menunjukkan penurunan nilai TS. Filem PLA / kitosan ditambah baik dengan penambahan sejumlah kecil CNC yang menghasilkan nanokomposit PLA, yang akan dinilai lebih lanjut untuk aplikasi pembungkusan buah. Data yang diperoleh melalui penyelidikan ini dapat menyumbang pada pembentukan biofilm dengan peningkatan sifat sifat fizikal dan mekanikal yang lebih baik yang menjanjikan kelebihan yang ketara dari segi jangka hayat penyimpanan yang lebih lama, mengekalkan keselamatan, dan mengekalkan kualiti produk terutamanya dalam pembungkusan buah-buahan

Kata kunci: asid polilaktik, kitosan, selulosa nanokristal, filem, pembungkusan

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