Barbash V A, Yaschenko O V, Alushkin S V, Kondratyuk A S, Posudievsky O Y, Koshechko V G
National Technical University of Ukraine "Kyiv Polytechnic Institute", Prospect Peremogy 37, Kyiv, 03056, Ukraine.
L.V. Pisarzhevsky Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, Prospect Nauki 31, Kyiv, 03028, Ukraine.
Nanoscale Res Lett. 2016 Dec;11(1):410. doi: 10.1186/s11671-016-1632-1. Epub 2016 Sep 20.
The development of the nanomaterials with the advanced functional characteristics is a challenging task because of the growing demand in the market of the optoelectronic devices, biodegradable plastics, and materials for energy saving and energy storage. Nanocellulose is comprised of the nanosized cellulose particles, properties of which depend on characteristics of plant raw materials as well as methods of nanocellulose preparation. In this study, the effect of the mechanochemical treatment of bleached softwood sulfate pulp on the optical and mechanical properties of nanocellulose films was assessed. It was established that the method of the subsequent grinding, acid hydrolysis and ultrasound treatment of cellulose generated films with the significant transparency in the visible spectral range (up to 78 % at 600 nm), high Young's modulus (up to 8.8 GPa), and tensile strength (up to 88 MPa) with increased ordering of the packing of the cellulose macromolecules. Morphological characterization was done using the dynamic light scattering (DLS) analyzer and transmission electron microscopy (TEM). The nanocellulose particles had an average diameter of 15-30 nm and a high aspect ratio in the range 120-150. The crystallinity was increased with successive treatments as shown by the X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analysis. The thermal degradation behavior of cellulose samples was explored by thermal gravimetric analysis (TGA).
由于市场对光电器件、可生物降解塑料以及节能和储能材料的需求不断增长，开发具有先进功能特性的纳米材料是一项具有挑战性的任务。纳米纤维素由纳米级纤维素颗粒组成，其性能取决于植物原料的特性以及纳米纤维素的制备方法。在本研究中，评估了漂白针叶木硫酸盐浆的机械化学处理对纳米纤维素膜光学和机械性能的影响。结果表明，通过对纤维素进行后续研磨、酸水解和超声处理的方法，所制备的薄膜在可见光谱范围内具有显著的透明度（在600nm处高达78%）、高杨氏模量（高达8.8GPa）和拉伸强度（高达88MPa），且纤维素大分子的堆积有序性增加。使用动态光散射（DLS）分析仪和透射电子显微镜（TEM）进行形态表征。纳米纤维素颗粒的平均直径为15 - 30nm，长径比在120 - 150范围内。通过X射线衍射（XRD）和傅里叶变换红外光谱（FTIR）分析表明，随着连续处理，结晶度增加。通过热重分析（TGA）研究了纤维素样品的热降解行为。
