Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, 565-0871, Japan.
Research Division of Environmental Technology, Osaka Research Institute of Industrial Science and Technology, 1-6-50 Morinomiya, Joto-ku, Osaka, 536-8553, Japan.
Carbohydr Polym. 2018 Nov 15;200:381-390. doi: 10.1016/j.carbpol.2018.08.016. Epub 2018 Aug 7.
Bacterial cellulose (BC) gel is synthesized by static culture process at the interface between air and medium. The solvent-exchanged BC gel is incorporated into polyacrylonitrile (PAN) copolymer solution under heating at 90 °C and subsequent cooling gives bacterial cellulose-polyacrylonitrile composite (BC-PAN) monolith. The BC-PAN monolith is carbonized at 1000 °C with physical activation in the presence of CO to obtain the activated carbon monolith, BC-PAN-AC, with large surface area and high microporosity. Unique morphologies are observed for BC gel which is propagated to the BC-PAN monolith and restored in BC-PAN-AC. The BC nanofibers remain entwined throughout the porous skeleton of the PAN backbone and the entangled structure helps in retaining the continuity of the matrix of BC-PAN-AC and reduce the grain boundary impedance for electrical conduction. Cyclic voltammetry shows that these activated carbons are good electrode materials in electric double layer capacitors (EDLC) with capability of high-speed charging and discharging.
细菌纤维素（BC）凝胶是通过在空气和培养基之间的界面进行静态培养过程合成的。溶剂交换的 BC 凝胶在 90°C 下加热加入到聚丙烯腈（PAN）共聚物溶液中，随后冷却得到细菌纤维素-聚丙烯腈复合（BC-PAN）整体。BC-PAN 整体在 1000°C 下碳化，并在 CO 的存在下进行物理活化，得到具有大表面积和高微孔率的活性炭整体，BC-PAN-AC。在 BC-PAN-AC 中，观察到独特的形态，BC 凝胶传播到 BC-PAN 整体，并在 BC-PAN-AC 中恢复。BC 纳米纤维在 PAN 主链的多孔骨架中仍然缠绕在一起，纠缠结构有助于保持 BC-PAN-AC 基质的连续性，并减少电传导的晶界阻抗。循环伏安法表明，这些活性炭在双电层电容器（EDLC）中是良好的电极材料，具有高速充电和放电的能力。
