Green Engineering, Institute of Advanced Technology, Universiti Putra Malaysia, 43400 Serdang UPM, Selangor, Malaysia.
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.
Carbohydr Polym. 2016 Aug 1;146:36-45. doi: 10.1016/j.carbpol.2016.03.051. Epub 2016 Mar 19.
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.
本研究制备了由糖棕淀粉（SPS）和聚乳酸（PLA）组成的环保双层薄膜，并对其进行了性能研究。对 SPS-PLA 双层薄膜及其各层组分的物理、机械、热学和阻水性进行了表征。在 50%SPS 层中添加 50%PLA 层（SPS50-PLA50），可将纯 SPS 薄膜的拉伸强度从 7.74MPa 提高到 13.65MPa，但断裂伸长率从 46.66%降低至 15.53%。PLA 层的加入显著降低了双层薄膜的水蒸气透过率、吸水率和溶解度，这归因于 PLA 层的疏水性。此外，SPS50-PLA50 的扫描电子显微镜（SEM）图像表明 SPS 和 PLA 之间缺乏强界面附着力。总的来说，在 SPS 薄膜中加入 PLA 层提高了基于 SPS 的薄膜在食品包装方面的适用性。
