具有增强介电性能的柔性再生纤维素/聚吡咯复合薄膜。
Flexible regenerated cellulose/polypyrrole composite films with enhanced dielectric properties.
机构信息
Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin-22, India; Federal Institute of Science and Technology, Hormis Nagar, Angamaly, Kerala, India.
School of Chemical Sciences, MG University, Kottayam, Kerala, India.
出版信息
Carbohydr Polym. 2017 Feb 10;157:1024-1032. doi: 10.1016/j.carbpol.2016.10.065. Epub 2016 Oct 21.
Flexible regenerated cellulose/polypyrrole (RC-PPy) conductive composite films were prepared by insitu polymerization of pyrrole on regenerated cellulose (RC) matrix using ammonium persulphate as oxidant. FTIR, XPS and XRD analysis of RC-PPy composite films revealed strong interaction between polypyrrole (PPy) and RC matrix. XRD results indicated that crystalline structure of RC matrix remains intact even after composite formation. SEM micrographs revealed the formation of a continuous conductive network of PPy particles in the RC matrix, leading to significant improvement in electrical and dielectric properties. The electrical conductivity of RC-PPy composites with 12wt% of PPy was 3.2×10S/cm, which is approximately seven fold higher than that of RC. Composites showed high dielectric constant and low dielectric loss values, which is essential in capacitor application.
柔性再生纤维素/聚吡咯（RC-PPy）导电复合膜是通过在再生纤维素（RC）基体上原位聚合吡咯，使用过硫酸铵作为氧化剂制备的。RC-PPy 复合膜的 FTIR、XPS 和 XRD 分析表明，聚吡咯（PPy）与 RC 基体之间存在强烈相互作用。XRD 结果表明，即使在形成复合材料后，RC 基体的结晶结构仍然保持完整。SEM 显微照片显示，在 RC 基体中形成了 PPy 颗粒的连续导电网络，从而显著提高了电导率和介电性能。在 PPy 含量为 12wt%的 RC-PPy 复合材料的电导率为 3.2×10S/cm，约为 RC 的 7 倍。该复合材料具有高介电常数和低介电损耗值，这在电容器应用中是必不可少的。
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