机械浆长纤维阳离子化及其性能的研究  

Cationization of TMP Long Fibres and its Properties

作　　者：毛连山[1] 刘桂南[2] Claude Daneault Francois Brouillette 

机构地区：[1]南京林业大学化工学院,江苏南京210037 [2]加拿大魁北克大学三河分校制浆造纸研究中心

出　　处：《中国造纸学报》2008年第2期79-84,共6页Transactions of China Pulp and Paper

摘　　要：通过中心复合设计优化了2,3-环氧丙基三甲基氯化铵(EPTMAC)与机械浆纤维接枝反心的工艺条件,同时研究了阳离子机械浆对纤维羧基和磺酸基、纸张性能和细小纤维留着的影响。研究结果表明,当浆浓11%、反心温度36℃、反应时间30 min、NaOH和EPTMAC的用量分别为9.1 mmol/g和36.3 mmol/g时,浆纤维的阳离子表面电荷密度为1597 mmol/kg,在反应体系中EPT- MAC的用量和反应温度是重要的影响因素。但是阳离子化反应使得浆纤维的羧基和磺酸基含量下降,当浆纤维的阳离子表面电荷密度提高到1600 mmol/kg时,羧基和磺酸基分别从98.3 mmol/kg和49.8 mmol/kg下降到23.6 mmol/kg和12.2 mmol/kg,导致浆纤维间结合力下降,成纸强度降低。添加10%电荷密度小于330 mmol/kg阳离子浆于未处理的原浆中,不仅能够有效地提高机械浆对细小组分的留着,而且能提高纸张的强度。The technical conditions of grafting mechanical fibres with 2,3-epoxypropyltrimethyl ammonium chloride （EPTMAC） were optimized by Central Composite Designs（CCD） , the effects of cationic mechanical fibres on carboxyl and sulphonic group contents of fibres, paper properties and fines retention were investigated. It was found that when reaction temperature was 36℃, reaction time was 30 min, the amount of NaOH and EPTMAC was 9.1 mmol/g and 36.3 mmol/g respectively, the surfaee charge density of mechanical fibres was 1597 mmol/kg, and the dosage of EPTMAC and reaction temperature were of particular significance in generating cationic surface charge. However, the eationization of fibres reduced the c.ontent of carboxyl and sulfonic group, when the cationic charge density increased by 1600 mmol/ kg, the content of carboxyl and sulfonic dropped to 23.6 mmol/kg and 12.2 mmol/kg from 98.3 mmol/kg and 49.8 mmol/kg respectively, as a consequence, decreased inter-fibre bonding potential and the strength of paper. However, there would be helped improve the retention of fines in the mechanical pulp as well as the strength of paper when the cationized fibres which the cationic charge density was less than 330 mmol/kg was added into the untreated pulp.

关 键 词：2 3-环氧丙基三甲基氯化铵 机械浆 表面电荷密度 纸张性能 细小纤维留着 

分 类 号：TS75[轻工技术与工程—制浆造纸工程]