Chemical modification of cotton cellulose in supercritical carbon dioxide: Synthesis and characterization of cellulose carbamate
Chemical modification of cotton cellulose in supercritical carbon dioxide: Synthesis and characterization of cellulose carbamate
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DOI：
10.1016/j.carbpol.2006.05.010
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发表时间：
2007-01
影响因子：
11.2
通讯作者：
Cuiyu Yin;Jianbo Li;Qun Xu;Qingyan Peng;Yabei Liu;Xinyuan Shen
中科院分区：
文献类型：
--
作者：
Cuiyu Yin;Jianbo Li;Qun Xu;Qingyan Peng;Yabei Liu;Xinyuan Shen
研究了棉纤维素在超临界二氧化碳中的化学改性，成功地合成了纤维素氨基甲酸酯。与传统的氨基甲酸酯法相比，超临界法可显著提高纤维素的含氮量。讨论了浸渍压力、酯化温度和酯化时间对产物氮含量的影响。采用傅里叶变换红外光谱（FTIR）、核磁共振谱（NMR）、X射线衍射（XRD）和热重分析（TG）对改性纤维素进行了表征。此外，利用扫描电子显微镜（SEM）研究了改性纤维素纤维的表面形态。
Chemical modification of cotton cellulose in supercritical carbon dioxide has been studied and cellulose carbamate has been successfully synthesized. Compared with the conventional carbamate process, the supercritical method had remarkably increased the nitrogen content of the modified cellulose. The effects of impregnating pressure, esterification temperature and esterification time on the nitrogen content of the products were discussed. The modified cellulose was characterized by Fourier transform infrared spectroscopy (FTIR), NMR spectrometer, X-ray diffraction (XRD), and thermogravimetry (TG). In addition, the surface morphology of modified cellulose fibers was investigated using scanning electron micrographs (SEM).