Birefringence measurements of aqueous cellulose nanocrystal (CNC) suspensions are reported. Seven suspensions with concentrations between 0.7 and 1.3% per weight are sheared in a Taylor-Couette type setting and characterized using a birefringent measurement technique based on linear polarized light and acquisition with a polarization camera. Steady state measurements with shear rates up to 31 1/s show extinction angles of 23°–40° and birefringence in the order of 1e–5. The findings demonstrate the utility of CNC suspensions for flow birefringence studies.

中文翻译：

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水性纤维素纳米晶体悬浮液的双折射特性

报告了水性纤维素纳米晶体 (CNC) 悬浮液的双折射测量。在 Taylor-Couette 型设置中剪切浓度在每重量 0.7% 和 1.3% 之间的七种悬浮液，并使用基于线性偏振光的双折射测量技术和偏振相机采集来表征。剪切速率高达 31 1/s 的稳态测量显示消光角为 23°–40°，双折射约为 1e–5。研究结果证明了 CNC 悬浮液在流动双折射研究中的实用性。