School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA.
Carbohydr Res. 2010 Jan 26;345(2):284-90. doi: 10.1016/j.carres.2009.09.037. Epub 2009 Oct 20.
Water-soluble sulfonated cellulose (SC) samples were synthesized by oxidizing hardwood kraft pulp with sodium periodate followed by the sulfonation reaction with sodium bisulfite. Six levels of oxidation/sulfonation were obtained by using different mmols (0.93-4.67) of periodate per gram of pulp. The aldehyde and sulfonic acid contents, surface morphology, and water solubility property of these treated fibers were characterized. It was found that carbonyl group content increased with the periodate charge and so did the sulfonic acid content in subsequent sulfonation step. Scanning electron microscopy images showed a significant change in surface morphology of the sulfonated samples. Solubility of sulfonated cellulose in water was determined from (1)H NMR spectra and a solubility of 28.57 g/L was found when cellulose was oxidized with 4.67 mmol periodate per gram cellulose followed by the sulfonation reaction.
水溶性磺化纤维素（SC）样品是通过用过氧化氢钠氧化硬木硫酸盐浆，然后用亚硫酸氢钠进行磺化反应合成的。通过使用不同的过氧化物摩尔数（0.93-4.67）每克纸浆，得到了六个氧化/磺化水平。对这些处理过的纤维的醛基和磺酸基含量、表面形态和水溶性进行了表征。结果表明，羰基含量随过氧化物用量的增加而增加，随后磺化步骤中的磺酸基含量也随之增加。扫描电子显微镜图像显示磺化样品的表面形态发生了显著变化。通过（1）H NMR 光谱测定磺化纤维素在水中的溶解度，当纤维素用 4.67 mmol 每克纤维素的过氧化物氧化后，再进行磺化反应，得到 28.57 g/L 的溶解度。
