Rasheed Masrat, Jawaid Mohammad, Parveez Bisma, Hussain Bhat Aamir, Alamery Salman
Laboratory of Biocomposite Technology, Institute of Tropical Forestry and Forest Products (INTROP), Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia.
Kulliyan of Engineering (KOE), Islamic International University Malaysia, Gombak 53100, Kuala Lumpur, Malaysia.
Polymers (Basel). 2021 Feb 1;13(3):465. doi: 10.3390/polym13030465.
The present study aims to develop a biodegradable polymer blend that is environmentally friendly and has comparable tensile and thermal properties with synthetic plastics. In this work, microcrystalline cellulose (MCC) extracted from bamboo-chips-reinforced poly (lactic acid) (PLA) and poly (butylene succinate) (PBS) blend composites were fabricated by melt-mixing at 180 °C and then hot pressing at 180 °C. PBS and MCC (0.5, 1, 1.5 wt%) were added to improve the brittle nature of PLA. Field emission scanning electron microscopy (FESEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscope (FTIR), thermogravimetric analysis (TGA), differential thermogravimetry (DTG), differential scanning calorimetry (DSC)), and universal testing machine were used to analyze morphology, crystallinity, physiochemical, thermal, and tensile properties, respectively. The thermal stability of the PLA-PBS blends enhanced on addition of MCC up to 1wt % due to their uniform dispersion in the polymer matrix. Tensile properties declined on addition of PBS and increased with MCC above (0.5 wt%) however except elongation at break increased on addition of PBS then decreased insignificantly on addition of MCC. Thus, PBS and MCC addition in PLA matrix decreases the brittleness, making it a potential contender that could be considered to replace plastics that are used for food packaging.
本研究旨在开发一种可生物降解的聚合物共混物，该共混物对环境友好，并且具有与合成塑料相当的拉伸性能和热性能。在这项工作中，通过在180°C下熔融混合，然后在180°C下热压，制备了从竹片增强聚乳酸（PLA）和聚丁二酸丁二醇酯（PBS）共混复合材料中提取的微晶纤维素（MCC）。添加PBS和MCC（0.5、1、1.5 wt%）以改善PLA的脆性。使用场发射扫描电子显微镜（FESEM）、扫描电子显微镜（SEM）、X射线衍射（XRD）、傅里叶变换红外光谱仪（FTIR）、热重分析（TGA）、微商热重分析（DTG）、差示扫描量热法（DSC）和万能试验机分别分析形态、结晶度、物理化学、热和拉伸性能。由于MCC在聚合物基体中均匀分散，PLA-PBS共混物中添加高达1wt%的MCC时热稳定性增强。添加PBS时拉伸性能下降，添加高于0.5 wt%的MCC时拉伸性能增加，然而，除了添加PBS时断裂伸长率增加，添加MCC时断裂伸长率略有下降。因此，在PLA基体中添加PBS和MCC可降低脆性，使其成为一种有潜力的竞争者，可被考虑用于替代食品包装用塑料。
