纤维电荷对阳离子聚电解质吸附性能的影响

The Influence of Fiber Charges on Adsorption of Cation Polyelectrolyte

关键词:  聚电解质滴定  纤维表面电荷  阳离子聚丙烯酰胺  吸附曲线  静电排斥力

Key Words:Polyelectrolyte adsorption  surface charges  CPAM  adsorption curve electrostatic repulsive force

摘要:以DQP漂白竹浆和麦草浆为原料，以CPAM作为阳离子聚电解质的模型物，以聚电解质滴定技术为研究方法，在测量纤维表面电荷和聚合物电荷密度的基础上，研究CPAM在纤维表面上的吸附量与纤维表面电荷特性的关系。结果发现，在纤维表面电荷一定的情况下聚电解质达到饱和吸附时的吸附量与纤维的表面电荷有很好的对应关系。

Abstract:It was recognized widely that the fibre charges play an important role in papermaking， which affect wet-end flocculation, dewatering, sizing as well as the properties of final products .The total charges contribute to cell wall swelling and fibers bonding. Surface charges affect the adsorption of chemical additives（e.g. retention aids and strength aids) on fibre. In this paper, DQP bleached wheat and bamboo pulps was used as material，CPAM was used as cation polyelectrolyte, the relation between fiber charges and the adsorption of CPAM on the fibers was studied by polyelectrolyte titration. The results indicated that there is a good relativity between fiber charges and the saturated adsorption amount of CPAM when fiber charges are constant.