Zyane Adel, Ablouh El-Houssaine, Sabbar El Mouloudi, Brouillette François, Belfkira Ahmed
Bioorganic and Macromolecular Chemistry Laboratory, Department of Chemistry, Faculty of Sciences and Technology, Cadi Ayyad University, 40000, Marrakesh, Morocco.
Center of Analysis and Characterization, Cadi Ayyad University, 40000, Marrakesh, Morocco.
Heliyon. 2020 Sep 19;6(9):e04977. doi: 10.1016/j.heliyon.2020.e04977. eCollection 2020 Sep.
In this study, various composite films were prepared by varying the amounts of long-oil Alkyd Resin (AR), Titanium Dioxide (TiO) and Microcrystalline Cellulose (MCC). The effects of each component, TiO and MCC, on the properties and microstructure of the dry film were determined by examining images obtained by scanning electron microscopy (SEM) and studying the evolution of dielectric properties, the dielectric constant and the loss factor, against frequency at room temperature. Results showed that the introduction of the TiO/MCC powder with a weight ratio larger than 1 and a volumetric pigment concentration (VPC) less than 50% allowed a better dispersion of the particles and fitted well the Linchtencker logarithmic mixing law and the Maxwell-Garnett theory. Finally, a marked improvement of the dielectric constant with respect to those of pure alkyd resin and AR/TiO composites was observed.
在本研究中，通过改变长油醇酸树脂（AR）、二氧化钛（TiO）和微晶纤维素（MCC）的用量制备了各种复合薄膜。通过扫描电子显微镜（SEM）获得的图像以及研究室温下介电性能、介电常数和损耗因子随频率的变化，确定了各组分（TiO和MCC）对干膜性能和微观结构的影响。结果表明，引入重量比大于1且体积颜料浓度（VPC）小于50%的TiO/MCC粉末可使颗粒更好地分散，并且与林琴克对数混合定律和麦克斯韦-加内特理论拟合良好。最后，观察到相对于纯醇酸树脂和AR/TiO复合材料，介电常数有显著提高。
