氧化降解法制备纳米纤维素的特性分析-《西北林学院学报》

文章信息/Info

Title:: Analysis of the Characteristic for the Cellulose Nanocrystals Prepared with Oxidative Degradation

作者:: 王晓宇¹; 张洋^1*; 江华²; 王超¹; 宋宇轩¹; 周兆兵¹; （1.南京林业大学材料科学与工程学院，江苏南京 210037；2.南京林业大学化学工程学院，江苏南京 210037）

Author(s):: WANG Xiao-yu¹; ZHANG Yang^1*; JIANG Hua²; WANG Chao¹; SONG Yu-xuan¹; ZHOU Zhao-bing¹; (1.College of Materials Science and Engineering,Nanjing Forestry University,Nanjing,Jiangsu 210037,China;2.College of Chemical Engineering,Nanjing Forestry University,Nanjing,Jiangsu 210037,China)

Keywords:: nanocrystals; oxidative degradation; ammonium persulfate; preparation; nanomaterials

摘要:: 利用过硫酸铵分别氧化降解微晶纤维素和纸浆制得纳米纤维素(Cellulose Nanocrystals,CNCs)，采用透射电子显微镜（TEM）、马尔文粒径仪、傅利叶红外光谱仪（FITR）和X-射线衍射仪(XRD)对所制备的CNCs的微观形貌、谱学性能及晶型结构进行表征分析。结果表明：过硫酸铵氧化微晶纤维素制备的CNCs的形态呈短棒状，直径分布为5~20 nm，其在1 731 cm^-1附近出现了羧基中C=O特征峰，XRD衍射图谱表明其纤维结构仍为纤维素I_β；过硫酸铵氧化纸浆制备的CNCs，直径分布为10~35 nm，长径比为11~30，与原料纸浆相比，在3 420、2 900、1 430、1 162、1 112 cm^-1和898 cm^-1对应的纤维素特征峰强度明显增强，在1 731 cm^-1附近出现了羧基中C=O特征峰，其XRD衍射图谱也表明纤维仍属于纤维素I_β。CNCs悬浮液胶体呈淡蓝色，随着浓度的增加，粘度不断增大，分散稳定性较好。

Abstract:: CNCs were prepared with ammonium persulfate (APS) by oxidative degradation of microcrystalline cellulose (MCC) and the pulp respectively.Characterize the microstructure,morphology and spectrum properties of the CNCs with the help of transmission electron microscopy (TEM),melvin particle size instrument,Fourier transform infrared (FITR) and X-ray diffraction (XRD).The results showed that the prepared CNCs from MCCs were short-rod like,approximately in the range of 5-20 nm in diameter,the results of FITR showed the basic structure of cellulose and at 1 731 cm^-1 appeared the peak of C=O.The XRD diffraction pattern showed that the structure of the CNCs were still cellulose I；the diameter of CNCs prepared from pulp was approximately in the range of 10-35 nm and its length to diameter ratio was in the range of 11 and 30,stronger peak of celluloseappeared at 3 420,1 430,2 900,1 112,1 162 cm^-1,and 898 cm^-1 comparing with the raw material and also appeared the peak of C=O at 1 731 cm^-1.The XRD diffraction pattern showed that CNCs belongto cellulose Ieither; CNC was scattered evenly andits suspension colloid was pale blue,and with the increase of concentration,the viscosity became higher and its dispersing stability was better.