Department of Fiber System Engineering, Dankook University, Jukjeon-dong, Yongin, Gyeonggi-do, Republic of Korea.
Department of Fiber System Engineering, Dankook University, Jukjeon-dong, Yongin, Gyeonggi-do, Republic of Korea.
Carbohydr Polym. 2016 Oct 20;151:119-129. doi: 10.1016/j.carbpol.2016.05.059. Epub 2016 May 19.
We prepared cellulose nanocrystal (CNC)/carboxymethyl cellulose (CMC) suspensions and nanocomposites and carried out rheological analysis of the all-cellulose samples. Morphological observation of the prepared CNCs was conducted using transmission electron microscopy (TEM) and atomic force microscopy (AFM). The electrokinetic characteristic of the CNCs was evaluated from zeta potential measurement. A simple shear test, an oscillatory shear test, and dynamic mechanical analysis (DMA) were carried out, and their results were compared. The findings revealed that the greater shear-thinning behavior and more solid-like rheological behavior were observed with an increase in the content of CNCs embedded in both the suspensions and nanocomposites. In addition, the viscoelastic properties acquired in different experimental modes (i.e., shear and extension) were compared from a rheological perspective.
我们制备了纤维素纳米晶体（CNC）/羧甲基纤维素（CMC）悬浮液和纳米复合材料，并对全纤维素样品进行了流变分析。使用透射电子显微镜（TEM）和原子力显微镜（AFM）对制备的 CNC 进行了形态观察。通过zeta 电位测量评估了 CNC 的电动特性。进行了简单剪切试验、振荡剪切试验和动态力学分析（DMA），并对其结果进行了比较。结果表明，随着悬浮液和纳米复合材料中嵌入的 CNC 含量的增加，观察到更大的剪切稀化行为和更类似固体的流变行为。此外，从流变学的角度比较了不同实验模式（即剪切和拉伸）获得的粘弹性性质。
