Mamudu Ukashat, Kabyshev Asset, Bekmyrza Kenzhebatyr, Kuterbekov Kairat A, Baratova Aliya, Omeiza Lukman Ahmed, Lim Ren Chong
Material Analysis and Metal Testing Department, National Metallurgical Development Centre, Jos PMB 2116, Nigeria.
Faculty of Physics and Technical Sciences, L. N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan.
Molecules. 2025 Apr 5;30(7):1622. doi: 10.3390/molecules30071622.
In this study, α-cellulose was extracted from lignocellulosic simpor leaf residue as a sustainable alternative to conventional cellulose sources. The extraction process involved the removal of hemicellulose, lignin, and other phytocompounds using alkali (NaOH) treatment and bleaching with hydrogen peroxide (HO). The nanocrystalline cellulose (NCC) was isolated from α-cellulose using sulfuric acid hydrolysis treatment followed by ultrasonication. The extracted α-cellulose and isolated NCC were characterized using Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and dynamic light scattering (DLS). The obtained results confirmed that the extracted NCC exhibited characteristic cellulose functional groups and a crystallinity index of 64.7%, indicating the effective removal of amorphous regions through sulfuric acid hydrolysis. The thermal stability of the extracted cellulose increased to 332 °C due to the elimination of extractives. DLS analysis showed that the extracted NCC exhibited high colloidal stability in polar solvents, characterized by a zeta potential of -70.8 mV and an average particle size of 251.7 nm. This study highlights an environmentally friendly approach for converting low-value biomass waste into high-value cellulose materials with potential applications in sustainable packaging, biomedical applications and composite reinforcement.
在本研究中，从木质纤维素辛波叶残渣中提取了α-纤维素，作为传统纤维素来源的可持续替代物。提取过程包括使用碱（NaOH）处理去除半纤维素、木质素和其他植物化合物，并用过氧化氢（HO）进行漂白。通过硫酸水解处理，随后进行超声处理，从α-纤维素中分离出纳米晶纤维素（NCC）。使用傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、热重分析（TGA）和动态光散射（DLS）对提取的α-纤维素和分离出的NCC进行了表征。所得结果证实，提取的NCC具有特征性的纤维素官能团，结晶度指数为64.7%，表明通过硫酸水解有效去除了无定形区域。由于提取物的去除，提取的纤维素的热稳定性提高到了332℃。DLS分析表明，提取的NCC在极性溶剂中表现出高胶体稳定性，其特征在于ζ电位为-70.8 mV，平均粒径为251.7 nm。本研究突出了一种将低价值生物质废物转化为高价值纤维素材料的环保方法，这些材料在可持续包装、生物医学应用和复合材料增强方面具有潜在应用。
