Department of Materials Science and Engineering, School of Engineering and Technology, Indian Institute of Technology Patna, Patna 800013, India.
Carbohydr Polym. 2013 Feb 15;92(2):1116-23. doi: 10.1016/j.carbpol.2012.10.021. Epub 2012 Oct 17.
Bionanowhiskers were extracted from jute by acid hydrolysis. At first cellulose microfibrils were formed by alkali treatment. Addition of an acid to the microfibrils triggered the formation of cellulose nanowhiskers. These were characterized by using different techniques viz. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetry (TGA), scanning electron microscopy (SEM) and atomic force microscopy (AFM). In the FTIR study, absence of peak at 1738 cm(-1) indicated removal of hemicellulose. The rod like morphology of the nanowhiskers (length - 550±100 nm, width - 77±30 nm) was observed after 1h of acid hydrolysis, whereas further increase in time resulted in triangular shape morphology. Acid hydrolysis increased crystallinity, but decreased the temperature corresponding to major degradation (T(max)) and onset of degradation (T(i)). These bionanowhiskers might be useful as reinforcing element in nanocomposites.
生物纳米须通过酸水解从黄麻中提取。首先通过碱处理形成纤维素微纤维。向微纤维中添加酸会触发纤维素纳米须的形成。使用不同的技术对其进行了表征，例如傅里叶变换红外光谱（FTIR）、X 射线衍射（XRD）、热重分析（TGA）、扫描电子显微镜（SEM）和原子力显微镜（AFM）。在 FTIR 研究中，1738 cm(-1)处的峰缺失表明半纤维素已被去除。在酸水解 1 小时后，观察到纳米须的棒状形态（长度为 550±100nm，宽度为 77±30nm），而进一步增加时间会导致三角形形态。酸水解增加了结晶度，但降低了主要降解（T(max)）和降解起始（T(i)）对应的温度。这些生物纳米须可用作纳米复合材料中的增强元素。
