材料科学
超声
色散(光学)
溶剂
聚合物
化学工程
纳米复合材料
纤维素
动态光散射
纳米晶
二甲基甲酰胺
水分
高分子化学
纳米颗粒
复合材料
有机化学
纳米技术
化学
物理
光学
工程类
作者
Huibin Chang,Jeffrey Luo,Amir A. Bakhtiary Davijani,An-Ting Chien,Po-Hsiang Wang,H. Clive Liu,Satish Kumar
标识
DOI:10.1021/acsami.6b00094
摘要
Good dispersion of cellulose nanocrystals (CNCs) in the polymer matrix is one of the key factors to obtaining good properties in the resulting nanocomposites. However, the preparation of individually dispersed CNCs in solvents or in polymer matrices has been a challenge. In this study, individually dispersed wood-based CNCs have been successfully prepared in solvents, including dimethylformamide (DMF), H2O, and a mixture of H2O/DMF, by sonication of moisture-containing CNCs. The CNCs dispersions were characterized by dynamic light scattering (DLS). It is found that CNCs containing above about 3.8 wt % moisture is critical for achieving individually dispersed CNC in solvents. Hydrodynamic radius (Rh) of CNCs is smaller in H2O/DMF co-solvent mixture than that in pure DMF or in pure H2O under same sonication treatment conditions. Experimental results have been corroborated using molecular simulation study.
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