Vijayakkannan K, Rajendran I
Department of Mechanical Engineering, Dr. Mahalingam College of Engineering and Technology, Pollachi, Tamilnadu 642003, India.
Department of Mechanical Engineering, Paavai Engineering College, Pachal, Tamilnadu 637018, India.
Int J Biol Macromol. 2024 Jun;269(Pt 1):131818. doi: 10.1016/j.ijbiomac.2024.131818. Epub 2024 Apr 24.
In this present work, characterize the chemical, physical, thermal and Morphological behaviour of raw and alkali-treated (NaOH 5 %,10 % & 15 %) new natural cellulose Habara plant stem fiber (HF). From the chemical analysis, the 10 % alkali-treated HF obtained cellulose (67.9 %), hemicellulose (12.7 %), lignin (11.8 %) wax (0.18 %), moisture (2.44 %) and Ash (1.21 %). Fourier Transform Infrared Spectroscopy Analysis, alkali treatment effectively eliminates hemicellulose and lignin from the surfaces of natural fiber, as seen changes in the FTIR peaks at 1730, 1480, and 1140 cm.The X-ray analysis results indicate that, there is crystalline cellulose present, with a crystallinity level of 43.87 %, and that the other components are amorphous. In addition, the thermal stability of lignocellulosic fiber up to 230 °C was observed, and the degradation steps of each major component could be identified. The 10 % alkali-treated HF provides tensile strength of 790.9 MPa, with an elongation at break of about 3.41 %. The Scanning Electron Microscope analysis showcased the morphological changes on the fiber fractured surface, diameter variation, and impurities, etc. The Atomic Force Microscopy was used to determine the surface roughness characteristics of the HF, which confirmed the possible reinforcement in the structure of the polymer matrix composite structure.
在本研究中,对天然新哈巴拉植物茎纤维(HF)及其经碱处理(5%、10%和15%的NaOH)后的纤维的化学、物理、热学和形态学行为进行了表征。化学分析表明,经10%碱处理的HF含有纤维素(67.9%)、半纤维素(12.7%)、木质素(11.8%)、蜡(0.18%)、水分(2.44%)和灰分(1.21%)。傅里叶变换红外光谱分析表明,碱处理有效地去除了天然纤维表面的半纤维素和木质素,这可从1730、1480和1140 cm处的FTIR峰变化看出。X射线分析结果表明,存在结晶纤维素,结晶度为43.87%,其他成分是无定形的。此外,观察到木质纤维素纤维在高达230°C时的热稳定性,并可确定各主要成分的降解步骤。经10%碱处理的HF的拉伸强度为790.9 MPa,断裂伸长率约为3.41%。扫描电子显微镜分析展示了纤维断裂表面的形态变化、直径变化和杂质等。原子力显微镜用于确定HF的表面粗糙度特征,这证实了在聚合物基复合材料结构中可能起到增强作用。