Vu An Nang, Nguyen Long Hoang, Tran Ha-Chi V, Yoshimura Kimio, Tran Tap Duy, Van Le Hieu, Nguyen Ngoc-Uyen T
Faculty of Materials Science and Technology, University of Science, VNU-HCM 700000 Vietnam
Vietnam National University Ho Chi Minh City 700000 Vietnam.
RSC Adv. 2024 Jan 9;14(3):2048-2060. doi: 10.1039/d3ra06724f. eCollection 2024 Jan 3.
Cellulose derived from biomass is a renewable resource with numerous applications. Using formic/peroxyformic acid at atmospheric pressure, cellulose nanocrystals (CNC) were isolated from rice husk (RH) in this study. This method was an excellent way to get rid of lignin and hemicelluloses from RH. The cellulose was subsequently acid hydrolyzed by HSO (64%) for 30 minutes at 45 °C. The chemical and microstructure analysis showed that the lignin and hemicellulose contents of raw RH had been eliminated, and the crystallinity content of CNC was 67.16%. According to transmission electron microscopy (TEM) morphological analysis, CNC measured 19 ± 3.3 nm in diameter, 195 ± 24 nm in length, and 10.2 ± 6.8 in aspect ratio. The thermal stability of RH and CNC was also investigated using thermogravimetric analysis (TGA). These encouraging findings demonstrated the potential for reusing RH agricultural waste to create CNC and include nanocomposites as a reinforcing material.
源自生物质的纤维素是一种具有多种用途的可再生资源。本研究在常压下使用甲酸/过氧甲酸从稻壳（RH）中分离出纤维素纳米晶体（CNC）。该方法是去除稻壳中木质素和半纤维素的绝佳途径。随后，纤维素在45°C下用64%的硫酸进行酸水解30分钟。化学和微观结构分析表明，原始稻壳中的木质素和半纤维素含量已被去除，CNC的结晶度含量为67.16%。根据透射电子显微镜（TEM）形态分析，CNC的直径为19±3.3纳米，长度为195±24纳米，长径比为10.2±6.8。还使用热重分析（TGA）研究了稻壳和CNC的热稳定性。这些令人鼓舞的发现证明了将稻壳农业废弃物再利用以制造CNC并将其作为增强材料纳入纳米复合材料的潜力。
