Chemistry Department, University of Engineering and Technology Lahore, Pakistan.
Chemistry Department, University of Engineering and Technology Lahore, Pakistan.
Int J Biol Macromol. 2021 Nov 30;191:964-972. doi: 10.1016/j.ijbiomac.2021.09.155. Epub 2021 Oct 1.
The incredible benefits of Alstonia scholaris are piquing researchers' attention in extracting its cellulose and utilizing it in further therapeutic applications. This study is based on cellulose extraction from its stalks and processed through chemical pre-treatments to manifest its cellulose content by using different bleaching reagents. A comparison was made on efficiencies of three reagents and it is found that the hydrogen peroxide exposed maximum cellulose than sodium hypochlorite and sodium chlorite. The experimental results revealed that A. scholaris possess 68-70% cellulose content. FTIR spectrum shows that OH- and CH- vibrations of cellulose appeared at 3320 cm & 2892 cm respectively whereas SEM images show fibrillation, rough surface, and lumens in bleached fiber that attributes to the removal of lignin and hemicelluloses and confirms cellulose extraction. The XRD pattern certifies the crystalline nature and compactness of cellulose whereas tensile properties and TGA help in understanding its flexibility, mechanical strength, and thermal stability at 370 °C respectively.
使君子科植物的惊人益处引起了研究人员的关注，他们正在从中提取纤维素，并将其应用于进一步的治疗中。本研究基于从其茎秆中提取纤维素，并通过化学预处理进行加工，以使用不同的漂白试剂来显示其纤维素含量。比较了三种试剂的效率，结果发现过氧化氢比次氯酸钠和亚氯酸钠暴露的纤维素最多。实验结果表明，使君子科植物的纤维素含量为 68-70%。FTIR 光谱显示纤维素的 OH-和 CH-振动分别出现在 3320cm 和 2892cm 处，而 SEM 图像显示漂白纤维中的纤维化、粗糙表面和腔隙，这归因于木质素和半纤维素的去除，并证实了纤维素的提取。XRD 图谱证明了纤维素的结晶性质和致密性，而拉伸性能和 TGA 有助于分别在 370°C 时了解其灵活性、机械强度和热稳定性。
