Do Thai Anh, Nguyen Van Quyen, Nguyen Thi Minh Chau, Nguyen Thi Hang Nga, Le Thi Huong
Department of Advanced Materials Science and Nanotechnology, University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, 11307, Vietnam.
Faculty of Chemistry, University of Science, Vietnam National University, 19 Le Thanh Tong, Hoan Kiem, Hanoi, Vietnam.
Bioresour Bioprocess. 2025 Aug 22;12(1):89. doi: 10.1186/s40643-025-00920-6.
In the study, we report an effective and one-step chemical treatment for directly isolating microcrystalline cellulose (MCC) with a width of 10-50 μm and length of 100-1000 μm from various agricultural waste sources. This chemical treatment uses a peracetic acid solution combined with 2% H₂SO₄ at 80 °C for 2 h. After this one -step chemical treatment, we observed significant changes in chemical composition. For example, the cellulose percentage substantially increased across all biomass sources: from 26.73 to 55.94% for dragon fruit foliage, and from 41.26 to 64.13% for corn cob, and from 17.86 to 67.38% for banana pseudostem. Simultaneously, the lignin content decreased from 22.05 to 1.03%, 12.74 to 3.76% and 14.27 to 2.73%, respectively for dragon fruit foliage, corn cob, and banana pseudostem. XRD confirmed that the crystallinity of the bleached cellulose is high (above 65%), and elemental analysis showed the existence of only O and C elements in the bleached sample. We attributed the effectivity of our chemical treatment to the combination effect of solvent polarity, strong oxidative agent and HSO acid, which allows the removal of extractive, the lignin and partially hydrolysis hemicellulose component simultaneously at the short time. Our microcrystalline cellulose can serve as an effective matrix for gel polymer electrolytes, exhibiting good mechanical behavior and excellent electrical properties, with highest ionic conductivity of 197 mS. cm. Our study opens a new, simple path to directly isolate microcrystalline cellulose from lignocellulosic source and extend the application of microcrystalline cellulose toward the field in energy storage and conversion.
在本研究中，我们报道了一种有效且一步法的化学处理方法，可直接从各种农业废弃物来源中分离出宽度为10 - 50微米、长度为100 - 1000微米的微晶纤维素（MCC）。这种化学处理使用过氧乙酸溶液与2%的硫酸在80℃下混合2小时。经过这一步化学处理后，我们观察到化学成分发生了显著变化。例如，所有生物质来源的纤维素百分比都大幅增加：火龙果叶从26.73%增至55.94%，玉米芯从41.26%增至64.13%，香蕉假茎从17.86%增至67.38%。同时，火龙果叶、玉米芯和香蕉假茎的木质素含量分别从22.05%降至1.03%、从12.74%降至3.76%、从14.27%降至2.73%。X射线衍射证实漂白纤维素的结晶度很高（高于65%），元素分析表明漂白样品中仅存在氧和碳元素。我们将化学处理的有效性归因于溶剂极性、强氧化剂和硫酸的协同作用，这使得在短时间内能够同时去除提取物、木质素和部分水解半纤维素成分。我们的微晶纤维素可作为凝胶聚合物电解质的有效基质，表现出良好的机械性能和优异的电学性能，最高离子电导率为197 mS·cm。我们的研究开辟了一条新的、简单的途径，可直接从木质纤维素来源中分离微晶纤维素，并将微晶纤维素的应用扩展到储能和转换领域。
