RT Conference Proceedings
T1 Highly conductive microporous carbon fibers by electrospinning of lignin/phosphoric acid/ethanol solutions
A1 García-Mateos, Francisco José
A1 Rosas-Martínez, Juana María
A1 Ruiz-Rosas, Ramiro Rafael
A1 Rodríguez-Mirasol, José
A1 Cordero-Alcántara, Tomás
K1 Fibra de carbono
AB This contribution reports the preparation of electrospun lignin-based carbon fibers at different carbonization temperatures and the influence of heat treatments at temperatures ranging from 900 to 1600 ºC. The influence of the addition of phosphoric acid in the initial electrospinning solution on the structural ordering, electrical conductivity and porosity development of the final carbon fibers is studied in detail. Alcell lignin fibers were electrospun using a coaxial electrospinning device following the procedure previously reported by our research group. Electrospun H3PO4-lignin fibers were prepared in the same device by addition of phosphoric acid to the lignin solution using mass ratios of 0.1 and 0.3. The electrospun fibers were stabilized in air at 200 ºC, using a slow heating rate and carbonized under inert atmosphere at temperatures between 500 and 900 ºC. In addition, the fibers carbonized at 900 ºC were heat treated at temperatures between 1200 and 1600 ºC. The high temperature heat treatment removes most of the heteroatoms (O, P) for both carbon fibers. However, the surface area of the phosphorous containing carbon fibers is mostly preserved after the heat treatment, while a large porosity shrinkage is observed for the pure lignin-derived fibers. Thus, microporous carbon fibers with large electrical conductivity values have been obtained by heat treatment at 1600 ºC of P-containing electrospun carbon fibers.
YR 2019
FD 2019-11-06
LK https://hdl.handle.net/10630/18712
UL https://hdl.handle.net/10630/18712
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026