Nano-fibers Structures Lab. Biorefinery Engineering Department, Faculty of New Technologies Engineering, Shahid Beheshti University, P.O. Box: 4781173769 Zirab, Savadkoh, Mazandaran, Iran.
Biorefinery Engineering Department, Faculty of New Technologies Engineering, Shahid Beheshti University, P.O. Box: 4781173769, Zirab, Savadkoh, Mazandaran, Iran.
Int J Biol Macromol. 2019 Aug 15;135:512-520. doi: 10.1016/j.ijbiomac.2019.05.212. Epub 2019 May 29.
The current research intended to explore the hardwood pulps capabilities to produce cellulose (CNPs) and lignocellulose nanopapers (LNPs) and feasible enhancement of their performance for possible utilization in sustainable packaging. The high-yield hardwood pulps were then bleached to show the fundamental role of residual lignin on the ultrafine fibrillation processes, structural and barrier properties of nanopapers. X-ray diffraction results demonstrated that the crystallinity and crystallite size of CNPs and LNPs were lower than the corresponding starting pulps. Field emission scanning electron microscopy analysis showed that the average nanofibril diameter of the CNPs and LNPs are 35 nm and 23 nm, respectively. Elastic modulus of LNPs was found to be 9.1 and 10.8 GPa for Chemimechanical and Neutral sulfite semichemical pulps, respectively. The semi-porous and consolidated structure of LNPs prepared from CMP fibers contributed to yield the lowest water vapor transmission rate i.e. 108 g/m.day which is promising for potential applications in packaging materials.
本研究旨在探索硬木浆粕生产纤维素纳米颗粒（CNPs）和木质纤维素纳米纸（LNPs）的能力，并可能提高其性能，以应用于可持续包装。然后对高得率硬木浆粕进行漂白，以显示残余木质素对纳米纸超微纤维化过程、结构和阻隔性能的基本作用。X 射线衍射结果表明，CNPs 和 LNPs 的结晶度和晶粒尺寸均低于相应的起始浆粕。场发射扫描电子显微镜分析表明，CNPs 和 LNPs 的平均纳米纤维直径分别为 35nm 和 23nm。中性亚硫酸盐半化学浆和化机浆制备的 LNPs 的弹性模量分别为 9.1 和 10.8GPa。由 CMP 纤维制备的 LNPs 的半多孔和固结结构导致水蒸气透过率最低，即 108g/m·天，有望在包装材料中得到潜在应用。
