Influence of Ultrasonication Treatment on Mechanical, Optical, and Physiochemical Properties of Polyvinyl-alcohol/cornstarch Biocomposite Thin Films

IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY ECS Journal of Solid State Science and Technology Pub Date : 2024-05-14 DOI:10.1149/2162-8777/ad458e
Abdul Rauf Jamali, Asif Ahmed Shaikh and Ali Dad Chandio
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Abstract

Over the past few decades, Polyvinyl-alcohol (PVOH)/cornstarch (CS)-based composite thin films have garnered significant interest due to their enhanced properties. Synthesis of such films relies heavily on depolymerization reactions within the solution of the PVOH/CS blends. Understanding how depolymerization affects the crystal structure and properties of these films is crucial for further improvement. This study aims to evaluate the depolymerization effects of crosslinked PVOH incorporated with CS as filler materials (with an 80:20 mass ratio) using ultrasonication at various time intervals while maintaining a constant frequency of 25 KHz. The prepared solution is then cast into thin films using blade coating. Comparative analyses were then conducted between samples subjected to ultrasonication (treated) and without ultrasonication (untreated) to assess their properties based on structural physical, mechanical, optical, and aspects of biodegradability . The investigation revealed significant changes in crystal structure and lattice strains following ultrasonication of the PVOH/CS solution when compared to untreated PVOH/CS samples. Importantly, longer ultrasonication times correlated with increased tensile strength. Additionally, the treated samples led to improvements in thin film transparency and a notable decrease in absorbance. These changes were attributed to the mechanical depolymerization induced by ultrasonication, aligning the thin films with the necessary properties for food packaging applications.
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超声处理对聚乙烯醇/玉米淀粉生物复合薄膜机械、光学和理化特性的影响
在过去几十年中,聚乙烯醇(PVOH)/玉米淀粉(CS)基复合薄膜因其增强的性能而备受关注。此类薄膜的合成在很大程度上依赖于 PVOH/CS 混合物溶液中的解聚反应。了解解聚如何影响这些薄膜的晶体结构和性能对于进一步改进至关重要。本研究旨在评估以 CS 作为填充材料(质量比为 80:20)的交联 PVOH 的解聚效果,采用不同时间间隔的超声处理,同时保持 25 KHz 的恒定频率。然后使用刀片涂层将制备好的溶液浇铸成薄膜。然后对经过超声处理(处理过的)和未经过超声处理(未处理过的)的样品进行比较分析,以评估它们在结构物理、机械、光学和生物降解性等方面的特性。调查显示,与未处理的 PVOH/CS 样品相比,超声处理 PVOH/CS 溶液后晶体结构和晶格应变发生了显著变化。重要的是,超声处理时间越长,拉伸强度越高。此外,经过处理的样品还提高了薄膜的透明度,并显著降低了吸光度。这些变化都归因于超声诱导的机械解聚,使薄膜具备了食品包装应用所需的性能。
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来源期刊
ECS Journal of Solid State Science and Technology
ECS Journal of Solid State Science and Technology MATERIALS SCIENCE, MULTIDISCIPLINARY-PHYSICS, APPLIED
CiteScore
4.50
自引率
13.60%
发文量
455
期刊介绍: The ECS Journal of Solid State Science and Technology (JSS) was launched in 2012, and publishes outstanding research covering fundamental and applied areas of solid state science and technology, including experimental and theoretical aspects of the chemistry and physics of materials and devices. JSS has five topical interest areas: carbon nanostructures and devices dielectric science and materials electronic materials and processing electronic and photonic devices and systems luminescence and display materials, devices and processing.
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