Department of Polymer Science and Engineering, Inha University, Incheon 22212, Republic of Korea.
Department of Polymer Science and Engineering, Inha University, Incheon 22212, Republic of Korea.
Carbohydr Polym. 2017 Jun 1;165:247-254. doi: 10.1016/j.carbpol.2017.02.037. Epub 2017 Feb 16.
As a dry-based electrorheological (ER) material, phosphate microcrystalline cellulose (MCC), which exhibits ER properties under anhydrous conditions, was fabricated by the phosphorylation of MCC particles. The MCC particles were initially synthesized by the three step preparation of an alkali treatment, bleaching, and hydrolysis of cellulose particles from rice husk. The phosphate MCC was then synthesized via the phosphoric ester reaction of urea with phosphoric acid and MCC, and its chemical characteristics were examined by energy dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy. The phosphate MCC particles were dispersed in silicone oil to produce an ER fluid (10vol%), and its chain structure was observed directly by optical microscopy. The rheological behavior of the ER fluid was tested using a rotational rheometer under a range of electric fields, showing a polarization mechanism with a slope of 2.0 for the yield stress as a function of the applied electric field strengths.
作为一种基于干燥的电流变（ER）材料，磷酸微晶纤维素（MCC）在无水条件下表现出 ER 特性，是通过 MCC 颗粒的磷酸化制备的。MCC 颗粒最初是通过从稻壳中纤维素颗粒的碱处理、漂白和水解的三步制备来合成的。然后通过磷酸脲与磷酸和 MCC 的磷酸酯反应合成磷酸 MCC，并通过能谱和傅里叶变换红外光谱对其化学特性进行了检测。将磷酸 MCC 颗粒分散在硅油中制成 ER 流体（10vol%），并通过光学显微镜直接观察其链结构。使用旋转流变仪在一系列电场下测试 ER 流体的流变行为，表现出极化机制，屈服应力作为施加电场强度的函数呈 2.0 的斜率。
