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Abstract：
The steady rheological behavior of suspensions of solid particles thickened by cellulose nanocrystals is investigated. Two different types and sizes of particles are used in the preparation of suspensions, namely, TG hollow spheres of 69 µm in Sauter mean diameter and solospheres S-32 of 14 µm in Sauter mean diameter. The nanocrystal concentration varies from 0 to 3.5 wt% and the particle concentration varies from 0 to 57.2 vol%. The influence of salt (NaCl) concentration and pH on the rheology of suspensions is also investigated. The suspensions generally exhibit shear-thinning behavior. The degree of shear-thinning is stronger in suspensions of smaller size particles. The experimental viscosity data are adequately described by a power-law model. The variations in power-law parameters (consistency index and flow behavior index) under different conditions are determined and discussed in detail.
摘要：
研究了由纤维素纳米晶体增稠的固体颗粒悬浮液的稳定流变行为。两种不同类型和大小的颗粒用于制备悬浮液，即,Sauter平均直径为69µm的TG空心球和Sauter平均直径为14µm的S-32。纳米晶体浓度在0至3.5重量%之间变化,颗粒浓度在0至57.2体积%之间变化。还研究了盐（NaCl）浓度和pH值对悬浮液流变性的影响。悬浮液通常表现出剪切稀化行为。在较小尺寸颗粒的悬浮液中,剪切稀化的程度更强。实验粘度数据由幂律模型充分描述。确定并详细讨论了不同条件下幂律参数（一致性指数和流动行为指数）的变化。
