Hafila K Z, Jumaidin R, Ilyas R A, Selamat M Z, Yusof Fahmi Asyadi Md
Fakulti Kejuruteraan Mekanikal, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia; German-Malaysian Institute, Jalan Ilmiah Taman Universiti, 43000 Kajang, Selangor, Malaysia.
Fakulti Teknologi Kejuruteraan Mekanikal dan Pembuatan, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, 76100 Durian Tunggal, Melaka, Malaysia.
Int J Biol Macromol. 2022 Jan 1;194:851-860. doi: 10.1016/j.ijbiomac.2021.11.139. Epub 2021 Nov 25.
Thermoplastic starch is a potentially sustainable and biodegradable material. However, it possesses some limitations in terms of mechanical performance and high moisture sensitivity. In this current work, the characteristics of thermoplastic cassava starch (TPCS) containing palm wax at various loading were evaluated. TPCS was prepared via hot pressing by varying the ratios of palm wax (2.5, 5, 10, and 15 wt%). Next, characterization via scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), Fourier-transform infrared spectroscopy (FT-IR), mechanical, water solubility, thickness swelling and moisture absorption tests, were conducted on the samples. The findings showed that incorporating starch-based thermoplastics with palm wax has remarkably improved mechanical characteristics of the thermoplastic blends. Besides, the morphology of the samples demonstrated irregular and rougher cleavage fracture after palm wax addition. FT-IR indicated the existence of intermolecular interaction between TPCS and palm wax with the intermolecular hydrogen bonds that existed between them. The thermal stability of TPCS has improved with rising palm wax content. The incorporation of 15 wt% palm wax resulted in the lowest moisture absorption value among the samples. Overall, the developed TPCS/palm wax with improved mechanical and moisture resistance characteristics has the potential to be used as biodegradable materials.
热塑性淀粉是一种具有潜在可持续性和可生物降解性的材料。然而，它在机械性能和高湿度敏感性方面存在一些局限性。在当前这项工作中，对含有不同负载量棕榈蜡的热塑性木薯淀粉（TPCS）的特性进行了评估。通过改变棕榈蜡的比例（2.5、5、10和15重量%），采用热压法制备了TPCS。接下来，对样品进行了扫描电子显微镜（SEM）、热重分析（TGA）、差示扫描量热法（DSC）、傅里叶变换红外光谱（FT-IR）、力学性能、水溶性、厚度膨胀和吸湿测试等表征。结果表明，将淀粉基热塑性塑料与棕榈蜡混合显著改善了热塑性共混物的机械性能。此外，样品的形态显示，添加棕榈蜡后出现了不规则且更粗糙的解理断裂。FT-IR表明TPCS与棕榈蜡之间存在分子间相互作用以及它们之间存在的分子间氢键。随着棕榈蜡含量的增加，TPCS的热稳定性有所提高。添加15重量%棕榈蜡的样品在所有样品中吸湿值最低。总体而言，所开发的具有改善的机械性能和防潮性能的TPCS/棕榈蜡有潜力用作可生物降解材料。
