棉纤维碱法蒸煮时金属离子对纤维素聚合度的影响  

Effect of Metal Ions on the Viscosity of Cellulose in Cotton Fiber Cooking with Alkali

作　　者：汪珍珍[1] 李群[1] 牛立平[1] 

机构地区：[1]天津科技大学天津市制浆造纸重点实验室,天津300457

出　　处：《中国造纸学报》2011年第4期17-20,共4页Transactions of China Pulp and Paper

摘　　要：在不同金属离子存在的条件下,对脱脂棉纤维进行了碱法蒸煮,并测定蒸煮后棉纤维聚合度。结果表明,K+在一定程度上会促进棉浆中纤维素的降解,而Mg2+、Ca2+和Fe2+在一定程度上抑制了纤维素的降解。Similar to alkaline pulping, absorbent cotton was cooked by alkali in this experiment. This paper introduced the experiment conditions. The effect of different metal ions （ K ^＋ , Mg^2＋ , Ca^2＋ and Fe^2＋） on alkaline degradation of cellulose was studied. The copper ethylene- diamine （CED） method was used to measure the viscosity of absorbent cotton pulp, then the degree of polymerization （DP） of the cellulose was derivated. The results indicated that K ^＋promotes alkaline degradation of ceUulose in a certain degree; however, Mg^2＋, Ca^2＋ and Fe^2＋have the opposite effects on the absorbent cotton fiber.

关 键 词：纤维素 碱性降解 金属离子 碱法蒸煮 黏度 

分 类 号：TS713[轻工技术与工程—制浆造纸工程]