Sultana Sabiha, Imran Sohail, Naveed Amir, Hussain Sardar, Khattak Rozina, Shah Luqman Ali, Rehan Kamran, Rehan Imran, Rehman Mujeeb Ur, Hashmat Uzma, Haider Farzana
Department of Chemistry, Islamia College University, Peshawar, 25120, Pakistan.
Renewable Energy, Penryn Campus, University of Exeter, TR10 2FE, United Kingdom.
Heliyon. 2024 Mar 25;10(7):e28290. doi: 10.1016/j.heliyon.2024.e28290. eCollection 2024 Apr 15.
In this work there was investigated the synergistic effect of the nanomaterials-the Montmorillonite (MMT) and the vanadium pentoxide (VO) on the polyvinyl alcohol (PVA)/starch composite. The composite films were prepared by the solvent casting method. The characterization of the composites showed that the addition of the MMT and the VO to PVA/starch composite decreased the water solubility and water absorption capacity of the film. Both of the reinforcement materials enriched values of thermal conductivity and thermal stability of the composite. The TG/DTA and universal testing machine (UTM) analysis exhibited that MMT and VO augmented the thermal robustness and tensile strength of composites and decreased the strain to break. It was also observed that greater MMT concentration accelerates mechanical strength deterioration of the film owing to agglomeration. The scanning electron microscopy (SEM) analysis reflected great change in the surface morphology of the films in the presence and absence of MMT and VO. This was due to the interaction amid constituents of the composite. The chemical interaction between the PVA, Starch, MMT and the VO was also established via Fourier-transform infrared spectroscopy (FTIR) analysis, which revealed fluctuations in the absorbance position and intensity of the PVA/Starch. Antimicrobial activities against seven different cultures of bacteria (both-gram positive and -negative) and one fungus (), exposed that antimicrobial performance of the PVA amplified upon addition of the starch, MMT and VO, making these composites prospective candidates for the biodegradable packaging materials.
在这项工作中，研究了纳米材料蒙脱石（MMT）和五氧化二钒（VO）对聚乙烯醇（PVA）/淀粉复合材料的协同作用。通过溶液浇铸法制备了复合薄膜。复合材料的表征表明，向PVA/淀粉复合材料中添加MMT和VO降低了薄膜的水溶性和吸水能力。两种增强材料都提高了复合材料的热导率和热稳定性。热重/差示热分析（TG/DTA）和万能试验机（UTM）分析表明，MMT和VO提高了复合材料的热稳定性和拉伸强度，并降低了断裂应变。还观察到，较高的MMT浓度由于团聚加速了薄膜的机械强度劣化。扫描电子显微镜（SEM）分析反映了在有和没有MMT和VO的情况下薄膜表面形态的巨大变化。这是由于复合材料成分之间的相互作用。通过傅里叶变换红外光谱（FTIR）分析也确定了PVA、淀粉、MMT和VO之间的化学相互作用，该分析揭示了PVA/淀粉吸光度位置和强度的波动。对七种不同细菌培养物（革兰氏阳性和阴性）和一种真菌的抗菌活性表明，添加淀粉、MMT和VO后PVA的抗菌性能增强，使这些复合材料成为可生物降解包装材料的潜在候选材料。
