EFFECTS OF PROCESSINGOPERATIONS ON ZETAPOTENTIAL AND CATIONICDEMAND OF PULPS

编号 zgly0000332860

文献类型 期刊论文

文献题名 EFFECTS OF PROCESSINGOPERATIONS ON ZETAPOTENTIAL AND CATIONICDEMAND OF PULPS

学科分类 220.5570;林产化学加工学

作者 NishiK.Bhardwajt  SanjayKumar  PramodK.Bajpai[ 

作者单位 ResearchEngineer＆Correspondingauthor（ScientificAssistant 

母体文献 天津科技大学学报 

年卷期 2004,19(A01)

页码 276-280

年份 2004 

分类号 TS74 

关键词 牛皮纸浆  Z电势  阳离子需求  漂白纸浆  电动学 

文摘内容 The zeta potential and cationic demands of variouskraft pulps - unbleached, bleached and beaten to dif-ferent freeness levels were determined in the labora-tory. The zeta potential of pulp where the final stagewas a lignin degrading and dissolving treatment suchas alkaline extraction or hypochlorite was lower thanthe unbleached pulp. The cationic demand of un-bleached pulp was higher compared to that ofbleached pulp. Beaten pulps showed larger cationicdemands than the unbeaten pulps, which can be at-tributed to the larger specific surface area of pulpcomponents. Fibres become increasingly electroneg-ative when beaten and therefore cationic demand ofpulps increases with beating. When the zeta potentialmethod is used with furnishes of different freeness,the linear relationship is observed. However, theslope is decreasing with the decrease in freeness ofthe pulp。