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Preparation and characterization of sugarcane bagas hemicellulosic derivatives containing quaternary ammonium groups in various media 期刊名称： e-Polymers
作者： Jun-Li, Ren,Chuan-Fu, Liu,Run-Cang, Sun,Diao, She,Jian-Chao, Liu
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庐山大厦年份： 2007年
期号： 第1期情话英语
关键词： CPVC;pipe couplings;fatigue;crack growth;temperature;frequency
制作元宵的过程摘要：To increa the solubility and produce cationic or ampholytic polymers as beater additives in papermaking from native hemicellulos, quaternization of hemicellulos were performed by reacting hemicellulos with 3-chloro-2-hydroxypropyltrimethylammonium chloride (CHMAC) and preferably with 2,3-epoxypropyltrimethylammonium chloride (ETA) in aqueous sodium hydroxide, homogenously in dimethyl sulfoxide (DMSO), and completely heterogeneously in ethanol/water, respectively. The extent of modification was measured by degree of substitution (DS), and its value of up to 0.55 can be
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controlled by adjusting the molar ratio of reagent to hydroxyl functionality in hemicellulos and the concentration of sodium hydroxide. The characterization of hemicellulosic derivatives was performed by elemental analysis, GPC, FT-IR and 13C NMR 微胖男生发型
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