采用过硫酸铵法制备的氧化纳米纤维素增强羧甲基纤维素基纳米复合材料膜的性能表征。

Characterization of carboxymethyl cellulose-based nanocomposite films reinforced with oxidized nanocellulose isolated using ammonium persulfate method.

机构信息

Department of Food Engineering and Bionanocomposite Research Institute, Mokpo National University, 61 Dorimri, Chungkyemyon, Muangun, 534-729 Jeonnam, Republic of Korea; Food Engineering and Packaging Department, Food Technology Research Institute, Agricultural Research Center, Giza, Egypt.

Center for Humanities and Sciences, and Department of Food and Nutrition, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 120-701, Republic of Korea.

出版信息

Carbohydr Polym. 2017 Oct 15;174:484-492. doi: 10.1016/j.carbpol.2017.06.121. Epub 2017 Jul 1.

DOI:10.1016/j.carbpol.2017.06.121

PMID:28821096

Abstract

Cellulose nanocrystals (CNCs) were isolated from cotton linter (CL) and microcrystalline cellulose (MCC) using an ammonium persulfate (APS) method for a simultaneous isolation and oxidation of CNCs. The CNCs were in rod-like shape with a diameter of 10.3nm and 11.4nm, a length of 120-150nm and 103-337nm, a crystallinity index of 93.5% and 79.1% for the CNC and CNC, respectively. The suspensions of oxidized CNCs were transparent and stable with the zeta potential values of -50.6mV and -46.9mV. The CNCs were uniformly distributed within the carboxymethyl cellulose (CMC) polymer matrix. The tensile strength (TS) increased by 102% and 73%, and elastic modulus (E) increased by 228% and 166% with the incorporation of at 10wt% of CNC and CNC, respectively. Conclusively, the CNC showed a more uniform particle size distribution, higher crystallinity, transparency, thermal stability, and superior mechanical strength compared with the CNC.

摘要

纤维素纳米晶体（CNC）是从棉绒（CL）和微晶纤维素（MCC）中分离出来的，使用过硫酸铵（APS）法同时分离和氧化 CNC。CNC 呈棒状，直径为 10.3nm 和 11.4nm，长度为 120-150nm 和 103-337nm，结晶度指数分别为 93.5%和 79.1%。氧化 CNC 的悬浮液透明且稳定，zeta 电位值分别为-50.6mV 和-46.9mV。CNC 在羧甲基纤维素（CMC）聚合物基质中均匀分布。当添加 10wt%的 CNC 和 CNC 时，拉伸强度（TS）分别提高了 102%和 73%，弹性模量（E）分别提高了 228%和 166%。总之，与 CNC 相比，CNC 表现出更均匀的粒径分布、更高的结晶度、透明度、热稳定性和优异的机械强度。