Development and characterization of sugar palm starch and poly(lactic acid) bilayer films

M L Sanyang; S M Sapuan; M Jawaid; M R Ishak; J Sahari

doi:10.1016/j.carbpol.2016.03.051

Development and characterization of sugar palm starch and poly(lactic acid) bilayer films

Carbohydr Polym. 2016 Aug 1:146:36-45. doi: 10.1016/j.carbpol.2016.03.051. Epub 2016 Mar 19.

Authors

M L Sanyang¹, S M Sapuan², M Jawaid³, M R Ishak⁴, J Sahari⁵

Affiliations

¹ Green Engineering, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 Serdang UPM, Selangor, Malaysia.
² Green Engineering, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 Serdang UPM, Selangor, Malaysia; Department of Mechanical and Manufacturing Engineering, Universiti Putra Malaysia, 43400 Serdang UPM, Selangor, Malaysia; Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products, Universiti Putra Malaysia, 43400 Serdang UPM, Selangor, Malaysia. Electronic address: sapuan@upm.edu.my.
³ Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products, Universiti Putra Malaysia, 43400 Serdang UPM, Selangor, Malaysia.
⁴ Department of Aerospace Engineering, Universiti Putra Malaysia, 43400 Serdang UPM, Selangor, Malaysia.
⁵ Faculty of Science and Natural Resources, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu, 88400 Sabah, Malaysia.

PMID: 27112848
DOI: 10.1016/j.carbpol.2016.03.051

Abstract

The development and characterization of environmentally friendly bilayer films from sugar palm starch (SPS) and poly(lactic acid) (PLA) were conducted in this study. The SPS-PLA bilayer films and their individual components were characterized for their physical, mechanical, thermal and water barrier properties. Addition of 50% PLA layer onto 50% SPS layer (SPS50-PLA50) increased the tensile strength of neat SPS film from 7.74 to 13.65MPa but reduced their elongation at break from 46.66 to 15.53%. The incorporation of PLA layer significantly reduced the water vapor permeability as well as the water uptake and solubility of bilayer films which was attributed to the hydrophobic characteristic of the PLA layer. Furthermore, scanning electron microscopy (SEM) image of SPS50-PLA50 revealed lack of strong interfacial adhesion between the SPS and PLA. Overall, the incorporation of PLA layer onto SPS films enhances the suitability of SPS based films for food packaging.

Keywords: Bilayer film; Food packaging; Poly(lactic acid); Sugar palm starch.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Arecaceae / chemistry*
Food Packaging*
Polyesters / chemistry*
Polymers
Starch / chemistry*
Tensile Strength

Substances

Polyesters
Polymers
poly(lactide)
Starch