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Effect of electron beam radiation on POLY(LACTIC acid) biocomposites reinforced with waste tea powder
Radiation Physics and Chemistry ( IF 2.8 ) Pub Date : 2021-06-09 , DOI: 10.1016/j.radphyschem.2021.109612
Mohammad Khalid , Chantara Thevy Ratnam , Shee Jia Wei , Mohammad Reza Ketabchi , Gunasunderi Raju , Rashmi Walvekar , Nabisab Mujawar Mubarak

Waste tea powder (WTP)/poly(lactic acid) (PLA) biocomposites were prepared using a Brabender Plastograph mixer and RAY-RAN injection moulding machine. The effect of WTP loadings (0–50 wt %) and NaOH mercerisation on the properties of WTP/PLA biocomposites were investigated. The WTP/PLA biocomposites were then subjected to electron beam irradiation to elucidate the biocomposites' radiation compatibility. The infrared spectrum of untreated and treated WTP were obtained using Fourier Transform Infrared Spectroscopy (FTIR). The results show mercerisation of WTP facilitated its dispersion, as observed under scanning electron microscopy (SEM). The biocomposite's mechanical and thermal properties were obtained using a tensile test, Izod impact test, and thermogravimetric analysis (TGA). A decreasing trend for both tensile and impact tests with increasing WTP loading regardless of NaOH mercerisation was observed. However, the tensile strength of the irradiated biocomposite samples was not significantly affected. Moreover, the thermal stability of the biocomposites was improved with mercerisation but not affected by the irradiation process. Biocomposites with 50% mercerised WTP loading showed the highest equilibrium water absorption. Studies reveal that WTP/PLA biocomposites show radiation stability at low dosages of electron beam irradiation (20 and 40 kGy), which is beneficial for food and medical packaging applications. At higher doses, it appears that the WTP/PLA biocomposites undergo predominantly radiation-induced degradation.



中文翻译:

电子束辐射对废茶粉增强聚乳酸生物复合材料的影响

使用 Brabender Plastograph 混合器和 RAY-RAN 注塑机制备废茶粉 (WTP)/聚乳酸 (PLA) 生物复合材料。研究了 WTP 负载量(0-50 重量%)和 NaOH 丝光对 WTP/PLA 生物复合材料性能的影响。然后对 WTP/PLA 生物复合材料进行电子束照射,以阐明生物复合材料的辐射相容性。使用傅立叶变换红外光谱 (FTIR) 获得未处理和处理过的 WTP 的红外光谱。结果表明,WTP 的丝光促进了其分散,如在扫描电子显微镜 (SEM) 下观察到的。使用拉伸试验、悬臂梁冲击试验和热重分析 (TGA) 获得生物复合材料的机械和热性能。观察到无论 NaOH 丝光如何,随着 WTP 负载的增加,拉伸和冲击试验均呈下降趋势。然而,辐照后的生物复合材料样品的拉伸强度没有受到显着影响。此外,丝光处理提高了生物复合材料的热稳定性,但不受辐照过程的影响。具有 50% 丝光 WTP 负载的生物复合材料显示出最高的平衡吸水率。研究表明,WTP/PLA 生物复合材料在低剂量电子束照射(20 和 40 kGy)下表现出辐射稳定性,这对食品和医疗包装应用有利。在较高剂量下,WTP/PLA 生物复合材料似乎主要经历辐射诱导的降解。辐照后的生物复合材料样品的拉伸强度没有受到显着影响。此外,丝光处理提高了生物复合材料的热稳定性,但不受辐照过程的影响。具有 50% 丝光 WTP 负载的生物复合材料显示出最高的平衡吸水率。研究表明,WTP/PLA 生物复合材料在低剂量电子束照射(20 和 40 kGy)下表现出辐射稳定性,这对食品和医疗包装应用有利。在较高剂量下,WTP/PLA 生物复合材料似乎主要经历辐射诱导的降解。辐照后的生物复合材料样品的拉伸强度没有受到显着影响。此外,丝光处理提高了生物复合材料的热稳定性,但不受辐照过程的影响。具有 50% 丝光 WTP 负载的生物复合材料显示出最高的平衡吸水率。研究表明,WTP/PLA 生物复合材料在低剂量电子束照射(20 和 40 kGy)下表现出辐射稳定性,这对食品和医疗包装应用有利。在较高剂量下,WTP/PLA 生物复合材料似乎主要经历辐射诱导的降解。具有 50% 丝光 WTP 负载的生物复合材料显示出最高的平衡吸水率。研究表明,WTP/PLA 生物复合材料在低剂量电子束照射(20 和 40 kGy)下表现出辐射稳定性,这对食品和医疗包装应用有利。在较高剂量下,WTP/PLA 生物复合材料似乎主要经历辐射诱导的降解。具有 50% 丝光 WTP 负载的生物复合材料显示出最高的平衡吸水率。研究表明,WTP/PLA 生物复合材料在低剂量电子束照射(20 和 40 kGy)下表现出辐射稳定性,这对食品和医疗包装应用有利。在较高剂量下,WTP/PLA 生物复合材料似乎主要经历辐射诱导的降解。

更新日期:2021-06-17
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