Nanotechnology & Catalysis Research Centre (NANOCAT), Institute of Postgraduate Studies, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Nanotechnology & Catalysis Research Centre (NANOCAT), Institute of Postgraduate Studies, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Carbohydr Polym. 2016 Oct 20;151:1210-1219. doi: 10.1016/j.carbpol.2016.06.083. Epub 2016 Jun 20.
Nanocellulose was successfully isolated from Gelidium elegans red algae marine biomass. The red algae fiber was treated in three stages namely alkalization, bleaching treatment and acid hydrolysis treatment. Morphological analysis was performed by field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). TEM results revealed that the isolated nanocellulose had the average diameter and length of 21.8±11.1nm and of 547.3±23.7nm, respectively. Fourier transform infrared (FTIR) spectroscopy proved that the non-cellulosic polysaccharides components were progressively removed during the chemically treatment, and the final derived materials composed of cellulose parent molecular structure. X-ray diffraction (XRD) study showed that the crystallinity of yielded product had been improved after each successive treatments subjected to the treated fiber. The prepared nano-dimensional cellulose demonstrated a network-like structure with higher crystallinity (73%) than that of untreated fiber (33%), and possessed of good thermal stability which is suitable for nanocomposite material.
成功地从海木耳红藻海洋生物质中分离出纳米纤维素。红藻纤维经过三个阶段的处理，即碱化、漂白处理和酸水解处理。形态分析采用场发射扫描电子显微镜（FESEM）和透射电子显微镜（TEM）进行。TEM 结果表明，分离出的纳米纤维素的平均直径和长度分别为 21.8±11.1nm 和 547.3±23.7nm。傅里叶变换红外（FTIR）光谱证明，在化学处理过程中，非纤维素多糖成分逐渐被去除，最终得到的材料由纤维素母体分子结构组成。X 射线衍射（XRD）研究表明，经过连续处理后，产物的结晶度得到提高。制备的纳米纤维素具有网络状结构，结晶度（73%）高于未处理纤维（33%），具有良好的热稳定性，适合用于纳米复合材料。
