Yaisun Supitcha, Trongsatitkul Tatiya
School of Polymer Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
Center for Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok 10330, Thailand.
Polymers (Basel). 2023 Oct 16;15(20):4106. doi: 10.3390/polym15204106.
In this study, we utilized a hybridization approach for two different fibers to overcome the drawbacks of single-fiber-reinforced PLA composites. Coir fiber and bamboo leaf fiber were used as reinforcing natural fibers as their properties complement one another. Additionally, we combined thermal annealing with hybridization techniques to further improve the overall properties of the composites. The results showed that the hybridization of BF: CF with a ratio of 1:2 gave PLA-based hybrid composites optimal mechanical and thermal properties. Furthermore, the improvement in the thermal stability of hybrid composites, attributable to an increase in crystallinity, was a result of thermal annealing. The improvement in HDT in annealed 1BF:2CF hybrid composite was about 13.76% higher than that of the neat PLA. Annealing of the composites led to increased crystallinity, which was confirmed using differential scanning calorimetry (DSC). The synergistic effect of hybridization and annealing, leading to the improvement in the thermal properties, opened up the possibilities for the use of PLA-based composites. In this study, we demonstrated that a combined technique can be utilized as a strategy for improving the properties of 100% biocomposites and help overcome some limitations of the use of PLA in many applications.
在本研究中，我们采用了一种针对两种不同纤维的杂交方法，以克服单纤维增强聚乳酸（PLA）复合材料的缺点。椰壳纤维和竹叶纤维被用作增强天然纤维，因为它们的性能互补。此外，我们将热退火与杂交技术相结合，以进一步改善复合材料的整体性能。结果表明，椰壳纤维（CF）与竹叶纤维（BF）比例为1:2的杂交赋予了基于PLA的杂交复合材料最佳的机械和热性能。此外，由于结晶度增加，杂交复合材料热稳定性的提高是热退火的结果。经退火处理的1BF:2CF杂交复合材料的热变形温度（HDT）比纯PLA提高了约13.76%。使用差示扫描量热法（DSC）证实，复合材料的退火导致结晶度增加。杂交和退火的协同效应导致热性能的改善，为基于PLA的复合材料的使用开辟了可能性。在本研究中，我们证明了一种组合技术可作为一种改善100%生物复合材料性能的策略，并有助于克服PLA在许多应用中使用的一些局限性。
