Synthesis and characterization of bacterial cellulose sulfates using a SO3/pyridine complex in DMAc/LiC1
Synthesis and characterization of bacterial cellulose sulfates using a SO3/pyridine complex in DMAc/LiC1
复制标题
使用 SO3/吡啶复合物在 DMAc/LiC1 中合成和表征细菌纤维素硫酸盐
DOI：
10.1016/j.carbpol.2013.09.068
复制
发表时间：
2014-01-30
影响因子：
11.2
通讯作者：
Qin, Jinming
中科院分区：
文献类型：
--
作者：
Qin, Ziyu;Ji, Li;Qin, Jinming
通过细菌纤维素 (BC) 与 SO3/吡啶 (Py) 复合物在二甲基乙酰胺/氯化锂溶液中均匀硫酸化，制备了各种细菌纤维素硫酸钠 (SBCS)。使用傅里叶变换红外光谱、X射线衍射（XRD）、碳核磁共振光谱、凝胶渗透色谱、元素分析和热重分析对SBCS进行了表征。利用多种条件（包括不同量的 SO3/Py、温度和反应时间）来获得 DS 值范围为 0.10 至 1.50 的 SBCS。 XRD 图谱表明 SBCS 具有纤维素 II 类似物多晶型结构。研究了BC和微晶纤维素(MC)在各自反应中的差异。在硫酸化和解聚过程中，BC 比 MC 更具反应性。对于 BC 和 MC，C OH 的反应性顺序为 C6 > C2 > C3。 DS 值>0.31 的硫酸纤维素可溶于去离子水。 (C) 2013 Elsevier Ltd. 保留所有权利。
Various sodium bacterial cellulose sulfates (SBCS) were prepared via the homogeneous sulfation of bacterial cellulose (BC) with a SO3/pyridine (Py) complex in a dimethyl acetamide/lithium chloride solution. The SBCSs were characterized using Fourier transform infrared spectroscopy, X-ray diffraction (XRD), carbon nuclear magnetic resonance spectroscopy, gel permeation chromatography, elemental analyses, and thermal gravimetric analyses. A variety of conditions (including various amounts of SO3/Py, temperatures, and reaction times) were utilized to obtain SBCSs with DS values that ranged from 0.10 to 1.50. The XRD profiles indicated that the SBCSs had a cellulose II analog polymorphous structure. The differences between BC and microcrystalline cellulose (MC) were studied in their respective reactions. BC is more reactive than MC in both the sulfation and depolymerization processes. The order of reactivity for C OH is C6 > C2 > C3 for both BC and MC. Cellulose sulfates with DS values >0.31 were soluble in deionized water. (C) 2013 Elsevier Ltd. All rights reserved.