期刊
ACS APPLIED MATERIALS & INTERFACES
卷 6, 期 12, 页码 9418-9425出版社
AMER CHEMICAL SOC
DOI: 10.1021/am501808h
关键词
nanofibrillated cellulose (NFC); alignment; electric field; TEMPO-mediated oxidation; extend of oxidation; rachis of palm tree; dielectric permittivity
资金
- Hassan II Academy of Science and Technology
- International Institute for Multifunctional Materials for Energy Conversion-IIMEC (Texas, USA)
- CNRST-Morocco/CNRS-France (Volubilis Project)
This work aims to study how the magnitude, frequency, and duration of an AC electric field affect the orientation of two kinds of nanofibrillated cellulose (NFC) dispersed in silicone oil that differ by their surface charge density and aspect ratio. In both cases, the electric field alignment occurs in two steps: first, the NFC makes a gyratory motion oriented by the electric field; second, NFC interacts with itself to form chains parallel to the electric field lines. It was also observed that NFC chains become thicker and longer when the duration of application of the electric field is increased. In-situ dielectric properties have shown that the dielectric constant of the medium increases in comparison to the randomly dispersed NFC (when no electric field is applied). The optimal parameters of alignment were found to be 5000 Vpp/mm and 10 kHz for a duration of 20 min for both kinds of NFC. The highest increase in dielectric constant was achieved with NFC oxidized for 5 min (NFC-O-5min) at the optimum conditions mentioned above.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据