Polymer fractionation using chromatographic column packed with novel regenerated cellulose beads modified with silane

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• 作者：Xiong ; Xiaopeng ; Zhang ; Lina ; Wang ; Yifeng
• 关键词：Regenerated cellulose ; Beads ; Silane modification ; Preparative SEC
• 刊名：Journal of Chromatography A
• 出版年：2005
• 出版时间：January 21, 2005
• 年：2005
• 卷：1063
• 期：1-2
• 页码：71-77
• 全文大小：326 K

文摘

Novel microporous beads with the particle size of about 90μm were prepared, for the first time, from cellulose and konjac glucomannan (RC/KGM3) in 1.5M NaOH/0.65M thiourea aqueous solution by emulsification method. The microporous beads were then modified with silane to avoid the adsorption of polymers containing hydroxyl groups, coded as RC/KGM3-Si. A preparative size-exclusion chromatographic (SEC) column (500mm×20mm) was packed with RC/KGM3-Si, and its exclusion limit and fractionation range of the stationary phase were, respectively, weight-average molecular masses (M_w) of 4.8×l0⁵g/mol and 5.3×l0³–4.8×l0⁵g/mol for polystyrene in tetrahydrofuran. The preparative SEC column was used to fractionate poly(?-caprolactone) (PCL, M_w