Crystallographic Investigation of PVA@PLA Nanocomposite Film by X-ray Diffraction: Insight from High Resolution TEM
Md. Mazedul Haque Sachchu, Fahim Khandokar Anik, Shanawaz Ahmed, Sahil Aman, Upoma Podder, Nafis Rahman Sayeem, Md. Tarikul Islam, Md. Ashikur Rahaman, Jhalok Hossain, Mst Mustari Khatun, Md. Ashraful Alam
Journal of Engineering Research and Reports · pp. 310–327 · Published 7 Mar 2025
10.9734/jerr/2025/v27i31436Abstract
PLA-PVA films have desirable unique, unparalleled properties such as good oxygen and moisture barrier, excellent mechanical strength and low toxicity. The biodegradability of PLA and PVA offers a sustainable alternative to traditional plastic packaging. The PLA-PVA film stacking technology and its potential benefits for sustainable packaging. The XRD pattern of PVA exhibited sharp diffraction peaks at 20.0 ° and 41.0 °, reflecting its semi-crystalline nature, with the peak at 20.0 ° where a main diffraction of PLA was found around 16.5 °. PVA generally crystallizes in the monoclinic unit cell with dimensions of a= 7.81 Å, b= 2.52 Å, c= 5.51 Å, and α=γ= 90.0 °, and β= 91.70 °. PLA depicted semi-crystalline synthetic polymer with α form which most stable polymorph with shape an orthorhombic unit cell. Taking two typical spacing showed in 0.40 ± 0.02 nm and 0.26 ± 0.03 nm acquired from HR-TEM interface accord with (200) and (002) Miller indices of PVA. The HR-TEM images also computed the d-spacing of PLA 0.340 nm with respective fringe. SEM is used to obtain the morphology such a nanostructure PVA-PLA composite materials. The size, shape, purity, surface morphology and distribution of PLA-PVA composite were explored by SEM. The research explores the structure and properties of biodegradable PVA-PLA nanocomposite films using XRD, SEM and HR-TEM. The findings reveal how these materials can be made stronger and more sustainable, making them ideal for eco-friendly packaging.
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