【摘要】 涂料中加入羧甲基纤维素(CMC)会影响颜料/胶粘剂粒子的絮聚程度及流变性,主要原因是高岭土吸附CMC导致涂料胶体结合力的改变;含CMC的涂料能提高其保水性能和控制涂料流变性。在低剪切速率范围内(10-1～102s-1),含CMC的涂料为剪切稀化流体,可用Casson模型作为浓涂料悬浮液的本构方程。用吸收值表征涂料的保水性能,随CMC加入量的增加保水性能变好。更多还原

【Abstract】 Paper coating color is a poly-dispersing suspension system consisting of kaolin clay,calcium carbonate and latex.The adsorption of CMC onto clay results in the change of the binding force of the binders therefore will affect the extent of flocculation and rheology of pigment/binder particles.CMC can greatly improve water retention and rheology control.Under low shear(10 -1 ～10 2 s -1 ),CMC-latex coatings belong to shear-thinning fluids,and Casson model can be regarded as the constitutive equation for higher consistency coating suspensions.Water holding characteristic can be described with absorption value,and water escaping characteristic of coatings will decrease with the increase of CMC,but water holding characteristic will ascend.更多还原