Abstract

Rapid development of flexible electronics has raised the demand for renewable conductive materials. Biomass-derived cellulose fibers (CFs) are very promising candidates due to their outstanding advantages. In this paper, flexible, lightweight and freestanding biomaterial with high electrical conductivity was prepared via in situ chemical polymerization process using 3,4-ethylenedioxythiophene (EDOT) and CFs. In order to improve the performance of PEDOT/CFs, novel combined small-sized anion doping agents, sulphosalicylic acid (SSA) and sodium benzenesulfonate (SBS), were adopted to construct a well-organized conducting layer. The obtained PEDOT layer possessed good crystallinity and high doping level and was uniformly coated onto the surface of CFs through the dopant-dependent interface. The PEDOT:SSA-SBS/CFs exhibited electrical conductivity as high as 472 S/m and the mass loading was up to 1.92 mg/cm². Moreover, the flexible biomaterial displayed favorable electrochemical stability. Hence, the results presented here provide a new way to produce highly conducting and flexible biomaterial.

Graphic abstract

摘要

柔性电子的快速发展提高了对可再生导电材料的需求。生物质纤维素纤维（CFs）由于其突出的优势而成为非常有前途的候选材料。本文采用3,4-乙撑二氧噻吩（EDOT）和CFs通过原位化学聚合工艺制备了具有高电导率的柔性，轻便，独立的生物材料。为了提高PEDOT / CFs的性能，采用新型的组合型小型阴离子掺杂剂磺基水杨酸（SSA）和苯磺酸钠（SBS）来构建结构合理的导电层。所获得的PEDOT层具有良好的结晶度和高掺杂水平，并且通过依赖于掺杂剂的界面均匀地涂覆在CF的表面上。PEDOT：²。此外，柔性生物材料显示出良好的电化学稳定性。因此，这里提出的结果提供了一种生产高导电性和柔性生物材料的新方法。

图形摘要