Laboratoire d'Ingénierie et Matériaux, Faculté des Sciences Ben M'sik, Université Hassan II de Casablanca, B.P.7955, Casablanca, Morocco.
Materials Science and Nano-engineering Department, Mohammed VI Polytechnic University, Lot 660 - Hay Moulay Rachid, 43150, Ben Guerir, Morocco.
Carbohydr Polym. 2021 Feb 1;253:117311. doi: 10.1016/j.carbpol.2020.117311. Epub 2020 Oct 25.
Currently, agriculture sector produces enormous quantity of residues, creating severe environmental problems. These agricultural residues are rich in lignocellulosic fibers, making them sustainable sources to produce high added-value materials. This investigation aims to transform the eggplant plant residue (EPR) into purified cellulose microfibers (CMF) and cellulose nanocrystals (CNC). CMF with a yield of 54 %, diameter of 13.6 μm and crystallinity of 71 % were successfully obtained from raw EPR using alkali and bleaching treatments. By subjecting CMF to phosphoric and sulfuric acid hydrolysis, phosphorylated (P-CNC) and sulfated (S-CNC) were produced. P-CNC and S-CNC exhibited an aspect ratio of 89.4 and 74.2, zeta potential value of - 39.4 and - 28.7 mV, surface charge density of 116.7 and 218.2 mmol/kg cellulose and a crystallinity of 73 % and 80 %, respectively. Herein, the obtained cellulosic structures with excellent properties could be used in various applications, such as bio-derived fillers for polymer composites development.
目前，农业领域产生了大量的残留物，造成了严重的环境问题。这些农业残留物富含木质纤维素纤维，是生产高附加值材料的可持续资源。本研究旨在将茄子植物残渣（EPR）转化为纯化的纤维素微纤维（CMF）和纤维素纳米晶体（CNC）。通过碱处理和漂白处理，从原始 EPR 中成功获得了产率为 54%、直径为 13.6μm、结晶度为 71%的 CMF。通过对 CMF 进行磷酸和硫酸水解，得到了磷酸化（P-CNC）和硫酸化（S-CNC）。P-CNC 和 S-CNC 的纵横比分别为 89.4 和 74.2，Zeta 电位值分别为-39.4 和-28.7mV，表面电荷密度分别为 116.7 和 218.2mmol/kg 纤维素，结晶度分别为 73%和 80%。在此，获得的具有优异性能的纤维素结构可用于各种应用，如生物衍生填料用于聚合物复合材料的开发。
