Highly Thermostable, Flexible, and Conductive Films Prepared from Cellulose, Graphite, and Polypyrrole Nanoparticles
Highly Thermostable, Flexible, and Conductive Films Prepared from Cellulose, Graphite, and Polypyrrole Nanoparticles
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由纤维素、石墨和聚吡咯纳米颗粒制备的高度耐热、柔性和导电薄膜
DOI：
10.1021/acsami.5b04462
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发表时间：
2015-07-22
影响因子：
9.5
通讯作者：
Sun, Runcang
中科院分区：
文献类型：
--
作者：
Chen, Jinghuan;Xu, Jikun;Sun, Runcang
本研究将石墨粉(GP)引入导电纤维素/聚吡咯(PPy)复合膜中，以提高其导电性和热稳定性。在纤维素溶解之前，将GP分散在离子液体1-丁基-3-甲基咪唑氯([Bmim]Cl)中，并在膜表面原位化学聚合制备了纤维素/GP/PPy薄膜。详细研究了复合膜的结构特征和性能。GP片层嵌入到纤维素基质中，增加了薄膜的厚度，降低了薄膜的密度，导致了力学性能的下降。然而，石墨的加入显著提高了薄膜的热稳定性，复合薄膜在焙烧后仍能基本保持原有的形状。此外，薄膜的导电性提高了7倍，具有良好的电磁干扰屏蔽效果。纤维素/GP/PPy薄膜有望在电子、雷达规避、航空航天等领域成为一种有效的轻质电磁屏蔽材料。
In this study, graphite powder (GP) was introduced into the conductive cellulose/polypyrrole (PPy) composite films to increase their conductivity and thermal stability. The GP was dispersed in ionic liquid 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) before the dissolution of cellulose, and the cellulose/GP/PPy films were prepared by in situ chemical polymerization of PPy nanoparticles on the film surface. The structural characteristics and properties of the composite films were investigated in detail. The GP flakes, which were embedded in the cellulose matrix, increased the thickness and decreased the density of the films, leading to the decrement of mechanical properties. However, the thermal stability of the films was significantly improved by the incorporation of graphite, and the composite film could even substantially maintain the original shape after being burned. In addition, the electrical conductivity of the films was increased seven times, leading to the excellent electromagnetic interference shielding effectiveness. The cellulose/GP/PPy film could be considered as a potential candidate for the effective lightweight electromagnetic interference shielding materials in electronics, radar evasion, aerospace, and other applications.