Plasma Treatment of Different Biodegradable Polymers: A Method to Enhance Wettability and Adhesion Properties for Use in Industrial Packaging

Plasma Pub Date : 2024-01-26 DOI:10.3390/plasma7010007

E. Vassallo, M. Pedroni, Marco Aloisio, Silvia Maria Pietralunga, Riccardo Donnini, F. Saitta, Dimitrios Fessas

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Abstract

Biodegradable polymers (poly(butylene succinate (PBS)), poly(butylene adipate terephthalate (PBAT)) and poly(lactic acid)/poly(butylene adipate terephthalate (PLA/PBAT)) blend) were treated in radiofrequency (13.56 MHz) low-pressure (10 Pa) oxygen with argon post-crosslinking plasma to enhance wettability and adhesion properties. Surface morphology and roughness modification caused by plasma exposure were observed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Surface chemical modifications of plasma-treated samples were evaluated by Fourier Transform infrared spectroscopy (FTIR). Due to the limited durability of plasma activation, the hydrophobic recovery was evaluated by water contact angle (WCA) measurements. The ageing effect was measured over 15 days in order to assess this kind of treatment as a potential industrial scalable method to increase biodegradable polymers hydrophilic properties for food packaging applications. The effects of polymer activation on its weight loss were also determined. Differential scanning calorimetry (DSC) analysis was used to study the effect of plasma treatment on the thermal properties of the polymers, while the crystallinity was investigated by X-ray diffraction (XRD).

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不同生物可降解聚合物的等离子处理：增强工业包装中的润湿性和粘合性的方法

在射频（13.56 MHz）低压（10 Pa）氧气与氩气交联后等离子体中处理可生物降解聚合物（聚丁二酸丁二醇酯（PBS）、聚己二酸丁二醇酯（PBAT）和聚乳酸/聚己二酸丁二醇酯（PLA/PBAT）混合物），以增强其润湿性和粘附性。通过扫描电子显微镜（SEM）和原子力显微镜（AFM）观察了等离子曝光引起的表面形貌和粗糙度改变。傅立叶变换红外光谱（FTIR）对等离子体处理过的样品的表面化学改性进行了评估。由于等离子活化的持久性有限，疏水性的恢复通过水接触角（WCA）测量进行评估。对 15 天的老化效果进行了测量，以评估这种处理方法是否可作为一种潜在的工业扩展方法，增加可生物降解聚合物在食品包装应用中的亲水性能。此外，还测定了聚合物活化对其失重的影响。差示扫描量热法（DSC）分析用于研究等离子处理对聚合物热性能的影响，而结晶度则通过 X 射线衍射（XRD）进行了研究。

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来源期刊

Plasma

CiteScore

2.30

自引率

0.00%

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