由于全球环境问题日益严重,例如二氧化碳排放量的增加,塑料的不当处置日益受到关注。石油来源不断减少,和污染,这就需要研究和开发可生物降解材料作为传统包装材料的替代品。本研究的目的是分析热塑性马铃薯淀粉(TPS)和聚丙交酯的可生物降解聚合物混合物的性能,(PLA),不添加和添加柠檬酸(CA)作为潜在的增容剂和增塑剂。对制备的共混物进行了全面的物理化学表征,其中包括:FTIR-ATR光谱,通过扫描电子显微镜(SEM)进行形态分析,通过差示扫描量热法(DSC)测定热和机械性能,水蒸气渗透率(WVP),以及土壤中的生物降解测试。获得的结果表明,由于添加了柠檬酸,TPS和PLA相之间的粘合性得到了改善,结构的均匀性更好,以及聚合物共混物的更大相容性,导致更好的热量,研究的可生物降解的TPS/PLA聚合物共混物的机械性能和阻隔性能。在进行了本文概述的全面研究之后,已确定添加5wt.%的柠檬酸用作有效的增容剂和增塑剂。这种补充实现了跨热量的最佳平衡,机械,形态学,和阻隔性能,同时还通过生物降解促进材料的可持续性。总之,可以说热塑性淀粉在TPS/PLA共混物中的使用加速了PLA作为可缓慢生物降解的聚合物的生物降解。虽然添加柠檬酸为TPS/PLA共混物提供了显着的优势,需要进一步的研究来优化配方和加工参数,以实现机械强度之间的理想平衡,热和阻隔性能和生物降解性。
The improper disposal of plastics is a growing concern due to increasing global environmental problems such as the rise of CO2 emissions, diminishing petroleum sources, and pollution, which necessitates the research and development of biodegradable materials as an alternative to conventional packaging materials. The purpose of this research was to analyse the properties of biodegradable polymer
blends of thermoplastic potato starch (TPS) and polylactide, (PLA) without and with the addition of citric acid (CA) as a potential compatibilizer and plasticizer. The prepared
blends were subjected to a comprehensive physicochemical characterization, which included: FTIR-ATR spectroscopy, morphological analysis by scanning electron microscopy (SEM), determination of thermal and mechanical properties by differential scanning calorimetry (DSC), water vapour permeability (WVP), as well as biodegradation testing in soil. The obtained results indicate an improvement in adhesion between the TPS and PLA phases due to the addition of citric acid, better homogeneity of the structure, and greater compatibility of the polymer
blends, leading to better thermal, mechanical and barrier properties of the studied biodegradable TPS/PLA polymer blends. After conducting the comprehensive research outlined in this paper, it has been determined that the addition of 5 wt.% of citric acid serves as an effective compatibilizer and plasticizer. This supplementation achieves an optimal equilibrium across thermal, mechanical, morphological, and barrier properties, while also promoting material sustainability through biodegradation. In conclusion, it can be stated that the use of thermoplastic starch in TPS/PLA
blends accelerates the biodegradation of PLA as a slowly biodegradable polymer. While the addition of citric acid offers significant advantages for TPS/PLA
blends, further research is needed to optimize the formulation and processing parameters to achieve the desired balance between mechanical strength, thermal and barrier properties and biodegradability.