Department of Polymer Engineering, Faculty of Chemical, Universiti Teknologi Malaysia, UTM 81310 Skudai, Johor, Malaysia.
Carbohydr Polym. 2013 Oct 15;98(1):139-45. doi: 10.1016/j.carbpol.2013.05.069. Epub 2013 Jun 2.
In this work, polylactic acid (PLA) composites filled with microcrystalline cellulose (MCC) from oil palm biomass were successfully prepared through solution casting. Fourier transform infrared (FT-IR) spectroscopy indicates that there are no significant changes in the peak positions, suggesting that incorporation of MCC in PLA did not result in any significant change in chemical structure of PLA. Thermogravimetric analysis was conducted on the samples. The T50 decomposition temperature improved with addition of MCC, showing increase in thermal stability of the composites. The synthesized composites were characterized in terms of tensile properties. The Young's modulus increased by about 30%, while the tensile strength and elongation at break for composites decreased with addition of MCC. Scanning electron microscopy (SEM) of the composites fractured surface shows that the MCC remained as aggregates of crystalline cellulose. Atomic force microscopy (AFM) topographic image of the composite surfaces show clustering of MCC with uneven distribution.
在这项工作中，通过溶液浇铸成功制备了填充来自油棕生物质的微晶纤维素（MCC）的聚乳酸（PLA）复合材料。傅里叶变换红外（FT-IR）光谱表明，峰位置没有明显变化，表明 MCC 的加入并未导致 PLA 的化学结构发生任何显著变化。对样品进行了热重分析。T50 分解温度随着 MCC 的加入而提高，表明复合材料的热稳定性有所提高。合成的复合材料在拉伸性能方面进行了表征。杨氏模量增加了约 30%，而复合材料的拉伸强度和断裂伸长率随着 MCC 的加入而降低。复合材料断裂表面的扫描电子显微镜（SEM）表明，MCC 仍保持为结晶纤维素的聚集态。复合材料表面原子力显微镜（AFM）形貌图像显示 MCC 发生团聚且分布不均匀。
