摘要
针对造纸湿部系统常用助留剂阳离子聚丙烯酰胺(CPAM)在稀释过程中消耗清水量过大的问题,采用与上网浆浓度相当的阔叶木硫酸盐浆悬浮液取代清水对CPAM进行稀释,并利用旋转流变仪对所得到的CPAM-浆料体系的流变特性进行研究。结果表明,在中等转速下,所获得的CPAM-浆料混合体系的黏度随浆液浓度的增加而增加,并且出现剪切稀化现象,高转速下呈现牛顿流体的性质;温度对CPAM-浆料体系黏度的影响符合安德雷德黏度-温度曲线,随温度升高有降低趋势;稀释用浆浓度对CPAM的黏度影响较大,随浆浓的升高而升高,并且呈现假塑性流体的性质。
The replacement of fresh water by dilute furnish suspension for CPAM dilution is an important way to decrease the consumption of fresh water in paper mill. In this work, the rheological properties of cationic polyacrylamide（CPAM） diluted by hardwood kraft pulp suspensions were studied by rotational rheometer. The results showed that the apparent viscosities of CPAM-pulp suspensions increased with increase of pulp consistency at medium speed. Besides the shear thinning characteristics, CPAM-pulp suspensions showed many properties of Newtonian fluid under the high speed. And the temperature dependence of apparent viscosities obeyed the Andrade equation, as apparent viscosities of CPAM-pulp suspensions decreased with the increase of temperature. The apparent viscosities were also strongly affected by hardwood kraft pulps for dilutions, which increased with increasing pulps consistency.Tbus CPAM-pulp suspensions exhibited pseudoplastic properties.
出处
《纸和造纸》
北大核心
2010年第10期14-17,共4页
Paper and Paper Making
基金
国家自然科学基金项目(20776054)
广东省自然科学基金博士启动项目(8451064101000807)
教育部高校博士点基金新教师课题(200805611104)
广东省高等学校自然科学研究重点项目(06Z002)
制浆造纸工程国家重点实验室开放基金的资助
关键词
阳离子聚丙烯酰胺
旋转流变仪
流变特性
cationic polyacrylamide
rotaional rheometer
rheological properties
