ABSTRACT

Carpenter waste has been used as a raw material for synthesizing microcrystalline cellulose through various chemical pre-treatment process sequences. Carpenter waste treated with 10% (w/v) sodium hydroxide followed by various concentration of sodium chlorite (0.5%, 0.7%, and 1.0%) treatment has resulted in substantial loss in weight. The synthesized microcrystalline cellulose has been characterized by different instrumental analysis. FT-IR data showed the successful removal of hemicellulose and lignin from the carpenter waste after various chemical treatments. Wide-angle X-ray diffraction analysis is done to measure the crystallinity index and crystal size of the synthesized microcrystalline cellulose. The microcrystalline cellulose produced under different concentrations of sodium chlorite exhibits crystallinity index in the range of 67.56 to 68.85 and calculated average crystal size within the range of 6.47–6.60 nm. The calculated average particle size of microcrystalline cellulose ranges from 96.42 to 437.83 nm depending on the treatment conditions. Higher concentration of sodium chlorite treatment has led to lowering the particle size. Scanning Electron Microscopic image of microcrystalline cellulose shows curled and soft-flat shaped with rough pits and fibrillated network structure. Field Emission Scanning Electron Microscopic analysis reveals the cylindrical rod-shaped morphology and porous structure of the synthesized microcrystalline cellulose from carpenter waste.

摘要

木匠废料已被用作通过各种化学预处理工艺序列合成微晶纤维素的原料。用 10% (w/v) 氢氧化钠处理木工废料，然后用不同浓度的亚氯酸钠（0.5%、0.7% 和 1.0%）处理导致重量显着减少。合成的微晶纤维素已通过不同的仪器分析进行了表征。FT-IR 数据显示，经过各种化学处理后，木匠废料中的半纤维素和木质素被成功去除。进行广角X射线衍射分析以测量合成的微晶纤维素的结晶度指数和晶体尺寸。在不同浓度亚氯酸钠下生产的微晶纤维素的结晶度指数在67.56~68之间。85 和计算的平均晶体尺寸在 6.47-6.60 nm 范围内。微晶纤维素的计算平均粒径范围为 96.42 至 437.83 nm，具体取决于处理条件。较高浓度的亚氯酸钠处理导致粒径降低。微晶纤维素的扫描电子显微镜图像显示卷曲和软扁的形状，具有粗糙的凹坑和原纤化的网络结构。场发射扫描电子显微镜分析揭示了从木工废料中合成的微晶纤维素的圆柱形棒状形态和多孔结构。较高浓度的亚氯酸钠处理导致粒径降低。微晶纤维素的扫描电子显微镜图像显示卷曲和软扁的形状，具有粗糙的凹坑和原纤化的网络结构。场发射扫描电子显微镜分析揭示了从木工废料中合成的微晶纤维素的圆柱形棒状形态和多孔结构。较高浓度的亚氯酸钠处理导致粒径降低。微晶纤维素的扫描电子显微镜图像显示卷曲和软扁的形状，具有粗糙的凹坑和原纤化的网络结构。场发射扫描电子显微镜分析揭示了从木工废料中合成的微晶纤维素的圆柱形棒状形态和多孔结构。