Department of Cellulose and Paper Technology, Faculty of New Technologies Engineering, Shahid Beheshti University (SBU), Mazandaran, Zirab Campus, Iran.
Department of Cellulose and Paper Technology, Faculty of New Technologies Engineering, Shahid Beheshti University (SBU), Mazandaran, Zirab Campus, Iran.
Carbohydr Polym. 2017 Feb 10;157:1883-1891. doi: 10.1016/j.carbpol.2016.11.074. Epub 2016 Nov 27.
The purpose of this study is to explore the suitability of bagasse fiber for production of Cellulose Nanofiber (CNF) and Oriented Cellulose Nanopaper (OCNP) for the first time. Different types of CNF were thus produced either mechanically by homogenization or with enzymatic pre-treatment followed by homogenization. The CNF was thereafter used for the production of nanopapers through two approaches; i) Dispersion Casting (DC) and ii) Dynamic Sheet Former (DSF). Then, the prepared nanopapers were characterized in terms of surface, structural, morphological and mechanical properties. It was found that compared to DC method, the OCNP had higher crystallinity as well as superior tensile and tear indices. The results also showed that the highest tensile strength index value of 189Nm/g was measured for the OCNP at the Machine Direction (MD).This would most probably be attributed to the presumptive anisotropic orientation of the nanofibrils due to the shearing forces induced from the DSF. These unique characteristics of the OCNP are promising for potential applications in food packaging.
本研究旨在首次探索蔗渣纤维用于生产纤维素纳米纤维（CNF）和定向纤维素纳米纸（OCNP）的适宜性。为此，我们分别通过机械均化和酶预处理后再均化两种方法制备了不同类型的 CNF。此后，我们通过两种方法，即分散浇铸（DC）和动态片形成器（DSF），将 CNF 用于纳米纸的生产。然后，我们对制备的纳米纸进行了表面、结构、形态和机械性能的表征。结果表明，与 DC 方法相比，OCNP 具有更高的结晶度以及更优的拉伸和撕裂指数。结果还表明，在机器方向（MD）上，OCNP 的拉伸强度指数值最高，达到 189Nm/g。这很可能归因于 DSF 产生的剪切力引起的纳米纤维的假定各向异性取向。OCNP 的这些独特特性有望在食品包装中得到潜在应用。
